"LeMons" Opel Manta turbo system, now slated for street use. - Page 3
OpelGT.com is the premier Opel GT Forum on the internet. Registered Users do not see the above ads.
Page 3 of 6 FirstFirst 123456 LastLast
Results 41 to 60 of 110
Like Tree56Likes

Thread: "LeMons" Opel Manta turbo system, now slated for street use.

  1. #41
    Opeler
    Join Date
    Jun 2006
    Location
    N.H
    Posts
    150
    Downloads
    0
    Uploads
    0

    Lemons car

    So are we going to use your set up?I understand if you don't want to.The choice is yours,

    As of now we have you ,me ,Beau,Brent and the Funcks on the drives list.Duane said he may also be up for it.

    I think we have everything we need,Fuel cell from Amy's car,her extra seat.I have two stock motors both in good shap.both flat tops.Trailing arms with hime joints,welded 3.67 rear end,Extra sway bars ,ect.

    The only thing left is wheels and tires.I think we can find some miata wheels,we need 6 ,and them some Dunlops .205-50-15

    Strange question,what's your wast and inseam? I'm looking at weather or not we need to make the seat adjustable.

    Beau said he needs a weekend to finish the cage.Ive got some more tubing for the front of the car.

    Did I miss anything?

  2. Remove Advertisements
    OpelGT.com
    Advertisements
     

  3. #42
    Project 1450 supporter... Site Supporter My location RallyBob's Avatar
    Join Date
    Mar 2002
    Location
    Spofford, NH
    Posts
    12,474
    Real Name
    Bob Legere
    Downloads
    0
    Uploads
    0
    Quote Originally Posted by itb gt View Post
    So are we going to use your set up?I understand if you don't want to.The choice is yours,

    As of now we have you ,me ,Beau,Brent and the Funcks on the drives list.Duane said he may also be up for it.

    I think we have everything we need,Fuel cell from Amy's car,her extra seat.I have two stock motors both in good shap.both flat tops.Trailing arms with hime joints,welded 3.67 rear end,Extra sway bars ,ect.

    The only thing left is wheels and tires.I think we can find some miata wheels,we need 6 ,and them some Dunlops .205-50-15

    Strange question,what's your wast and inseam? I'm looking at weather or not we need to make the seat adjustable.

    Beau said he needs a weekend to finish the cage.Ive got some more tubing for the front of the car.

    Did I miss anything?
    The cylinder head and ceramic coatings certainly put us over the cost limits. I just wanna see it run in my street car! Afterwards, maybe I'll just build another turbo header. Only another day's work. No limits there

    36" waist, 34" inseam.
    My Flickr photos.
    C.R.L. 9/22/69 - 12/8/99, J.M.L. 3/3/43 - 6/15/04, D.M.L. 9/19/50 - 6/23/10
    E.G. Sauer 2/26/66 - 2/18/10. Rest in peace big guy...

    '70 GT 'Bonnie', '71 Ascona 4-dr turbo - winter beater, '71 Ascona 4-dr 'Turd' - rallycar, '72 Manta Rallye - hillclimb car, '72 Ascona wagon - 'Red', '72 Manta - caged street car, '73 Manta Luxus, '73 Ascona 2-dr, '74 Ascona 2-dr - Project X, '74 Manta Luxus - factory sunroof, '74 Manta ITB racecar, '75 Manta, '75 Sportwagon, '75 Manta - racecar

  4. #43
    Opeler
    Join Date
    Jun 2006
    Location
    N.H
    Posts
    150
    Downloads
    0
    Uploads
    0

    Lemons

    That's what I thought,the car was free,50 for the parts car.So we have 450 to play with.

    The BS penalty is 1 lap per 10$ I think.

    Sounds like the seat will work.

  5. Remove Advertisements
    OpelGT.com
    Advertisements
     

  6. #44
    Senior Member My location anastosmotors's Avatar
    Join Date
    Apr 2003
    Location
    Kenosha, WI
    Posts
    774
    Real Name
    Pete Anastopoulos
    Downloads
    0
    Uploads
    0
    Is racing seat part of safety parts? I think does not count as lemon $$.

    Pete
    * * * * * * * * * * * * * *
    Pete Anastopoulos
    www.anastosmotors.com
    anastosmotors@wi.rr.com* * * * * * * * * * * * * *

  7. #45
    Opeler
    Join Date
    Jun 2006
    Location
    N.H
    Posts
    150
    Downloads
    0
    Uploads
    0

    Lemons

    No the seat is not part of the 500$,but it needs to fit all drivers.I have a bunch but my daughters will work best for all drivers.

  8. #46
    Project 1450 supporter... Site Supporter My location RallyBob's Avatar
    Join Date
    Mar 2002
    Location
    Spofford, NH
    Posts
    12,474
    Real Name
    Bob Legere
    Downloads
    0
    Uploads
    0
    LeMons rules are kinda funny. No more than $500 for the car and all performance enhancements.

    However there's no limit to safety equipment. So theoretically you could put in a TIG welded FIA style cage in there, a $2000 carbon FIA seat, a $1500 fuel cell, etc.

    You could drop $10-12k in safety stuff if you so desired.
    My Flickr photos.
    C.R.L. 9/22/69 - 12/8/99, J.M.L. 3/3/43 - 6/15/04, D.M.L. 9/19/50 - 6/23/10
    E.G. Sauer 2/26/66 - 2/18/10. Rest in peace big guy...

    '70 GT 'Bonnie', '71 Ascona 4-dr turbo - winter beater, '71 Ascona 4-dr 'Turd' - rallycar, '72 Manta Rallye - hillclimb car, '72 Ascona wagon - 'Red', '72 Manta - caged street car, '73 Manta Luxus, '73 Ascona 2-dr, '74 Ascona 2-dr - Project X, '74 Manta Luxus - factory sunroof, '74 Manta ITB racecar, '75 Manta, '75 Sportwagon, '75 Manta - racecar

  9. #47
    Project 1450 supporter... Site Supporter My location RallyBob's Avatar
    Join Date
    Mar 2002
    Location
    Spofford, NH
    Posts
    12,474
    Real Name
    Bob Legere
    Downloads
    0
    Uploads
    0
    I've had a few PM's about this project regarding its status. Nothing to report however. I probably won't get a chance to work on it until next month. I'm pretty much tapped out financially from my vacation in New Hampshire, and I need to order abrasives to complete the cylinder head porting. Updates as they occur...
    My Flickr photos.
    C.R.L. 9/22/69 - 12/8/99, J.M.L. 3/3/43 - 6/15/04, D.M.L. 9/19/50 - 6/23/10
    E.G. Sauer 2/26/66 - 2/18/10. Rest in peace big guy...

    '70 GT 'Bonnie', '71 Ascona 4-dr turbo - winter beater, '71 Ascona 4-dr 'Turd' - rallycar, '72 Manta Rallye - hillclimb car, '72 Ascona wagon - 'Red', '72 Manta - caged street car, '73 Manta Luxus, '73 Ascona 2-dr, '74 Ascona 2-dr - Project X, '74 Manta Luxus - factory sunroof, '74 Manta ITB racecar, '75 Manta, '75 Sportwagon, '75 Manta - racecar

  10. #48
    3000 Post Club My location m610's Avatar
    Join Date
    May 2010
    Location
    Davis, CA USA
    Posts
    3,029
    Real Name
    Mike Meier
    Downloads
    1
    Uploads
    0
    Quote Originally Posted by RallyBob View Post
    LeMons rules are kinda funny. No more than $500 for the car and all performance enhancements.

    However there's no limit to safety equipment. So theoretically you could put in a TIG welded FIA style cage in there, a $2000 carbon FIA seat, a $1500 fuel cell, etc.

    You could drop $10-12k in safety stuff if you so desired.
    Safety also includes wheels, tires, ball joints, brakes, tie rod ends, and anything back of the fuel pump to and including the tank. Also, driver comfort and information (seat, cool shirt/seat, fancy-ass instrument panel, on-board cappuccino maker) are off-budget.

    They also let you replace the exhaust since most of the exhausts on these old cars are rusted out and about to fall off.

    But, while you might make it through tech inspection with a $20,000 car, you then need to get through BS inspection, and there the rules, if there are any, are very different. That inspection is more about the "spirit of LeMons".

  11. #49
    Project 1450 supporter... Site Supporter My location RallyBob's Avatar
    Join Date
    Mar 2002
    Location
    Spofford, NH
    Posts
    12,474
    Real Name
    Bob Legere
    Downloads
    0
    Uploads
    0
    Well, I found a box with a few leftover used cartridge rolls and sanding discs. Not enough to finish the head, but maybe enough to polish the combustion chambers.



    Last edited by RallyBob; 07-16-2014 at 12:07 PM. Reason: changed photo links
    opelman4u likes this.
    My Flickr photos.
    C.R.L. 9/22/69 - 12/8/99, J.M.L. 3/3/43 - 6/15/04, D.M.L. 9/19/50 - 6/23/10
    E.G. Sauer 2/26/66 - 2/18/10. Rest in peace big guy...

    '70 GT 'Bonnie', '71 Ascona 4-dr turbo - winter beater, '71 Ascona 4-dr 'Turd' - rallycar, '72 Manta Rallye - hillclimb car, '72 Ascona wagon - 'Red', '72 Manta - caged street car, '73 Manta Luxus, '73 Ascona 2-dr, '74 Ascona 2-dr - Project X, '74 Manta Luxus - factory sunroof, '74 Manta ITB racecar, '75 Manta, '75 Sportwagon, '75 Manta - racecar

  12. #50
    Opeler
    Join Date
    Apr 2013
    Location
    Buffalo
    Posts
    3
    Downloads
    0
    Uploads
    0
    Bob,

    Are you going to run a cam with a 110 lsa? If so, I would advise against that. Most of my experience is with American V8s and JDMs turbo set-ups. Many years of engine work on them, and found a much wider LSA is better for a turbo powered cars. Not sure if you have looked into this issue?

  13. #51
    Project 1450 supporter... Site Supporter My location RallyBob's Avatar
    Join Date
    Mar 2002
    Location
    Spofford, NH
    Posts
    12,474
    Real Name
    Bob Legere
    Downloads
    0
    Uploads
    0
    Quote Originally Posted by SkylineUSA View Post
    Bob,

    Are you going to run a cam with a 110 lsa? If so, I would advise against that. Most of my experience is with American V8s and JDMs turbo set-ups. Many years of engine work on them, and found a much wider LSA is better for a turbo powered cars. Not sure if you have looked into this issue?
    Yes I am. I'm using what I have. Keep in mind the duration of this cam is very modest: only 224 degrees @ .050". That's 4 degrees of overlap @ .050". A stock Opel cam has an LSA OF 110.5 degrees.

    A typical Opel " racing" turbo cam will have an LSA of 115 degrees, but 254 @ .050", giving 24 degrees of overlap at .050".

    Not an issue really. Most American V8's run much wider LSA angles on stock cams. As do many JDM engines (stock SR20 is 114 degrees for example).
    My Flickr photos.
    C.R.L. 9/22/69 - 12/8/99, J.M.L. 3/3/43 - 6/15/04, D.M.L. 9/19/50 - 6/23/10
    E.G. Sauer 2/26/66 - 2/18/10. Rest in peace big guy...

    '70 GT 'Bonnie', '71 Ascona 4-dr turbo - winter beater, '71 Ascona 4-dr 'Turd' - rallycar, '72 Manta Rallye - hillclimb car, '72 Ascona wagon - 'Red', '72 Manta - caged street car, '73 Manta Luxus, '73 Ascona 2-dr, '74 Ascona 2-dr - Project X, '74 Manta Luxus - factory sunroof, '74 Manta ITB racecar, '75 Manta, '75 Sportwagon, '75 Manta - racecar

  14. #52
    Opeler
    Join Date
    Apr 2013
    Location
    Buffalo
    Posts
    3
    Downloads
    0
    Uploads
    0
    Bob,

    Would you happen to know the stock 1.9 cam timing events? Agreed the overlap plays a much greater part in spool time than just looking at the LSA
    .
    Last edited by SkylineUSA; 08-29-2014 at 10:24 AM.

  15. #53
    Project 1450 supporter... Site Supporter My location RallyBob's Avatar
    Join Date
    Mar 2002
    Location
    Spofford, NH
    Posts
    12,474
    Real Name
    Bob Legere
    Downloads
    0
    Uploads
    0
    Quote Originally Posted by SkylineUSA View Post
    Bob,

    Would you happen to know the stock 1.9 cam timing events? Agreed the overlap plays a much greater part in spool time than just looking at the LSA
    .
    I know the cam timing specs of both the OEM hydraulic and solid cams. But I don't list them here for the benefit of racers who run stock classes. If the specs are in print, the rule makers can find them!

    The aftermarket cam has more duration and overlap than the OEM cams, measured at .050" tappet rise. But ironically the OEM cams have more seat-to-seat duration than the aftermarket cam, therefore more overlap measured seat-to-seat. The stock solid lifter cam is 310 degrees advertised duration! My aftermarket cam is 280 degrees advertised.
    My Flickr photos.
    C.R.L. 9/22/69 - 12/8/99, J.M.L. 3/3/43 - 6/15/04, D.M.L. 9/19/50 - 6/23/10
    E.G. Sauer 2/26/66 - 2/18/10. Rest in peace big guy...

    '70 GT 'Bonnie', '71 Ascona 4-dr turbo - winter beater, '71 Ascona 4-dr 'Turd' - rallycar, '72 Manta Rallye - hillclimb car, '72 Ascona wagon - 'Red', '72 Manta - caged street car, '73 Manta Luxus, '73 Ascona 2-dr, '74 Ascona 2-dr - Project X, '74 Manta Luxus - factory sunroof, '74 Manta ITB racecar, '75 Manta, '75 Sportwagon, '75 Manta - racecar

  16. #54
    7,000 Post Club My location wrench459's Avatar
    Join Date
    Jul 2005
    Location
    Milner, GA.
    Posts
    11,298
    Real Name
    Dan
    Downloads
    12
    Uploads
    0
    You know I've cussed the Opel engineers over many of there designs(electrical mostly)
    the one thing that they did do right is the camshaft!
    That sucker is very versatile to say the least.
    Supercharger..no problem
    Nitrous.. again no problem
    Turbo.. a walk in the park

    Si vis pacem, para bellum "If you want peace, prepare for war"

  17. #55
    Opeler
    Join Date
    Apr 2013
    Location
    Buffalo
    Posts
    3
    Downloads
    0
    Uploads
    0
    Quote Originally Posted by RallyBob View Post
    I know the cam timing specs of both the OEM hydraulic and solid cams. But I don't list them here for the benefit of racers who run stock classes. If the specs are in print, the rule makers can find them!

    The aftermarket cam has more duration and overlap than the OEM cams, measured at .050" tappet rise. But ironically the OEM cams have more seat-to-seat duration than the aftermarket cam, therefore more overlap measured seat-to-seat. The stock solid lifter cam is 310 degrees advertised duration! My aftermarket cam is 280 degrees advertised.
    Bob,

    Understand, thanks. I guess I'll breakout the ol' degree wheel, and dial indicator

  18. #56
    Project 1450 supporter... Site Supporter My location RallyBob's Avatar
    Join Date
    Mar 2002
    Location
    Spofford, NH
    Posts
    12,474
    Real Name
    Bob Legere
    Downloads
    0
    Uploads
    0
    Quote Originally Posted by SkylineUSA View Post
    Bob,

    Understand, thanks. I guess I'll breakout the ol' degree wheel, and dial indicator
    Expect a factory hydraulic to be under 200 @ .050".

    A factory solid has more than 200 @ .050", and is a split duration cam (more exhaust duration than intake duration).

    Hydraulics have more valve lift than the solid cams, especially when valve lash is considered.

    Opel rocker ratios can throw you off. They are typically rated at 1.5:1, but in fact, they are variable geometry due to the sliding tip that fits into the lifter top. So between 1.41-1.47 is more like it. Receeded valves (sunk into the head) lessen the ratio, as do smaller base circle (reground) camshafts. Ideally a shorter valve, and a bigger base circle will net the highest rocker ratio.
    My Flickr photos.
    C.R.L. 9/22/69 - 12/8/99, J.M.L. 3/3/43 - 6/15/04, D.M.L. 9/19/50 - 6/23/10
    E.G. Sauer 2/26/66 - 2/18/10. Rest in peace big guy...

    '70 GT 'Bonnie', '71 Ascona 4-dr turbo - winter beater, '71 Ascona 4-dr 'Turd' - rallycar, '72 Manta Rallye - hillclimb car, '72 Ascona wagon - 'Red', '72 Manta - caged street car, '73 Manta Luxus, '73 Ascona 2-dr, '74 Ascona 2-dr - Project X, '74 Manta Luxus - factory sunroof, '74 Manta ITB racecar, '75 Manta, '75 Sportwagon, '75 Manta - racecar

  19. #57
    Project 1450 supporter... Site Supporter My location RallyBob's Avatar
    Join Date
    Mar 2002
    Location
    Spofford, NH
    Posts
    12,474
    Real Name
    Bob Legere
    Downloads
    0
    Uploads
    0
    I can't believe it's been over 6 weeks since I've worked on this thing! Well, I guess other projects got in the way, and I needed to order three grits of cartridge rolls which I was fresh out of. They aren't cheap, cost me $75!

    Today I worked on the exhaust ports of the head. They were previously ported, but not polished. I got them all polished with 80 grit rolls, and then with 180 grit rolls. Good enough for a street engine!

    After polishing the ports, I hand lapped the exhaust valves into the exhaust seats.

    No time to work on the intake ports today, but at least now the chambers are done, and the exhaust ports are done. I will probably need a day or two off to let my hands recover anyway before finishing the intake ports, and then finally cleaning, flow testing, and assembling the head.

    View from the chamber side looking into the exhaust bowl.




    From outside the port:







    I'm predicting 93-95 cfm on the exhaust ports, and 115-117 cfm on the intake ports, based on other heads I've done this way (admittedly not for a long time though). A stock 1.9 is 88 cfm on the intake ports, and 67 cfm on the exhaust ports. I guess we'll see.
    My Flickr photos.
    C.R.L. 9/22/69 - 12/8/99, J.M.L. 3/3/43 - 6/15/04, D.M.L. 9/19/50 - 6/23/10
    E.G. Sauer 2/26/66 - 2/18/10. Rest in peace big guy...

    '70 GT 'Bonnie', '71 Ascona 4-dr turbo - winter beater, '71 Ascona 4-dr 'Turd' - rallycar, '72 Manta Rallye - hillclimb car, '72 Ascona wagon - 'Red', '72 Manta - caged street car, '73 Manta Luxus, '73 Ascona 2-dr, '74 Ascona 2-dr - Project X, '74 Manta Luxus - factory sunroof, '74 Manta ITB racecar, '75 Manta, '75 Sportwagon, '75 Manta - racecar

  20. #58
    Project 1450 supporter... Site Supporter My location RallyBob's Avatar
    Join Date
    Mar 2002
    Location
    Spofford, NH
    Posts
    12,474
    Real Name
    Bob Legere
    Downloads
    0
    Uploads
    0
    Today, despite the miserable 89 degrees air temp I managed to finish the cylinder head porting for this project. Actually, all that remained was for the intake ports to be polished, and for the intake valve seats to be lapped in. Nothing like donning ear, eye, and breathing protection on a hot day, and sweating so much that every piece of sandpaper grit and iron dust sticks to your skin. Oh joy....

    Intake ports were polished with 40 grit cartridge rolls, as smooth intake ports tend to let the fuel settle out of the incoming air/fuel mix.




    Finally, the completed headwork!







    My Flickr photos.
    C.R.L. 9/22/69 - 12/8/99, J.M.L. 3/3/43 - 6/15/04, D.M.L. 9/19/50 - 6/23/10
    E.G. Sauer 2/26/66 - 2/18/10. Rest in peace big guy...

    '70 GT 'Bonnie', '71 Ascona 4-dr turbo - winter beater, '71 Ascona 4-dr 'Turd' - rallycar, '72 Manta Rallye - hillclimb car, '72 Ascona wagon - 'Red', '72 Manta - caged street car, '73 Manta Luxus, '73 Ascona 2-dr, '74 Ascona 2-dr - Project X, '74 Manta Luxus - factory sunroof, '74 Manta ITB racecar, '75 Manta, '75 Sportwagon, '75 Manta - racecar

  21. #59
    Project 1450 supporter... Site Supporter My location RallyBob's Avatar
    Join Date
    Mar 2002
    Location
    Spofford, NH
    Posts
    12,474
    Real Name
    Bob Legere
    Downloads
    0
    Uploads
    0
    A couple of more shots:





    Then I threw the head on my flowbench for testing. I was, to be honest, a bit disappointed. Granted, I haven't done any 'double apple' porting to a 1.72" valved head in a while. I also didn't really enlarge the ports either, I just worked the bowls and guide areas mostly. I also tested cylinder #1, which has the worst intake and exhaust flow of a 1.9 head. And it was hot in my shop today, about 90 degrees. I did not correct my flow bench figures for air temperature. Or maybe I'm just getting old....






    Still.....it should be better! My target of 115-117 CFM on the intake was not met. I only got 109 CFM, and it flatlined early. It was the same from .425" lift to .550" lift. The cam I will be using is .432" lift BTW. The exhaust port flowed 92 CFM, and I had hoped for/predicted 93-95 CFM. So I was pretty close there.

    In the scheme of things, it's much better than an OEM 1.9 head. In fact it's nearly identical to a stock 2.4 head at 110 CFM intake/93 CFM exhaust, and that head has MUCH bigger ports, and in fact has much larger valves too. The 1.9 also hits these numbers nearly .100" sooner in valve lift than the 2.4.

    So is it good? It's good enough. Now I need to find those titanium retainers I put aside for this head, clean the head, assemble it, paint it, and bolt it onto the shortblock. Then finish my test stand and fire the sucker up.
    guyopel, wrench459, ggl and 2 others like this.
    My Flickr photos.
    C.R.L. 9/22/69 - 12/8/99, J.M.L. 3/3/43 - 6/15/04, D.M.L. 9/19/50 - 6/23/10
    E.G. Sauer 2/26/66 - 2/18/10. Rest in peace big guy...

    '70 GT 'Bonnie', '71 Ascona 4-dr turbo - winter beater, '71 Ascona 4-dr 'Turd' - rallycar, '72 Manta Rallye - hillclimb car, '72 Ascona wagon - 'Red', '72 Manta - caged street car, '73 Manta Luxus, '73 Ascona 2-dr, '74 Ascona 2-dr - Project X, '74 Manta Luxus - factory sunroof, '74 Manta ITB racecar, '75 Manta, '75 Sportwagon, '75 Manta - racecar

  22. #60
    7,000 Post Club My location wrench459's Avatar
    Join Date
    Jul 2005
    Location
    Milner, GA.
    Posts
    11,298
    Real Name
    Dan
    Downloads
    12
    Uploads
    0
    Quote Originally Posted by RallyBob View Post
    ...
    In the scheme of things, it's much better than an OEM 1.9 head. In fact it's nearly identical to a stock 2.4 head at 110 CFM intake/93 CFM exhaust, and that head has MUCH bigger ports, and in fact has much larger valves too. The 1.9 also hits these numbers nearly .100" sooner in valve lift than the 2.4.
    ..
    Bob does the both the intake and exhaust flow more .100 earlier?
    I would think that exhaust flow is more important with a turbo setup.
    The double-a$$ intakes will also help with fuel distribution issues.

    Oh and the video rocks that you uploaded 3 hrs ago on another site.
    Only 12 seconds long.. but it gets the point across
    Last edited by wrench459; 09-06-2014 at 08:50 PM.

    Si vis pacem, para bellum "If you want peace, prepare for war"

Page 3 of 6 FirstFirst 123456 LastLast

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

    Similar Threads

    1. Opel GT "Breadvan" WINS class at LeMons AutoBahn!!
      By m610 in forum Opel GT - 24 Hours of LeMons
      Replies: 11
      Last Post: 06-13-2013, 01:53 PM
    2. Retro-Opel "C" Manta?
      By 2 Fast 4 U in forum Opels in the Media
      Replies: 4
      Last Post: 04-21-2010, 04:40 PM
    3. "No slip" pulley system
      By Phoenix in forum General Discussions
      Replies: 7
      Last Post: 08-28-2007, 01:08 PM
    4. 2.3 turbo ford opel gt for sale (Was "Oh Mommy, that's fast")
      By jvandyke in forum Engine Swap Forum
      Replies: 48
      Last Post: 12-19-2006, 03:16 PM

    Bookmarks

    Posting Permissions

    • You may not post new threads
    • You may not post replies
    • You may not post attachments
    • You may not edit your posts
    •