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Kadett A/B Please post technical questions in the appropriate Technical Forum, unless it is very specific to the Kadett A or Kadett B.

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Old 11-29-2007   #1 (permalink)
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Unanswered: It lives...!

After close to two years of off-and-on tinkering in the driveway the '71 Kadett is close to being roadworthy...just in time for winter. A few weeks ago I replaced the original Solex with a new Weber 32/36 DGEV, and improved the engine performance dramatically. I know some people here swear by a well tuned Solex over a Weber, but I deemed mine toast and went with the Weber. It eliminated the small coolant lines from the original water choke and cleaned up the engine bay nicely.

After the install, the engine was a bit lumpy at first but smoothed out once it warmed up. It was slow to warm up though and after pulling the radiator cap found the thermostat was stuck in the open position. I broke a thermostat bolt trying to remove it but a new theomostat, gasket and bolt set are on the way from OGTS.

Last weekend I installed a new Pertronix electronic ignition and Flamethrower coil. I found the original points to be toast and the wire to the condenser was frayed. That was the likely culprit to the lumpy idle and less than optimum performance. The Pertronix install was painless and straightforward and now the engine is amazingly smooth and quiet. I guess i shouldn't be too suprised since it has only 26k original miles. Braking was less than stellar even after replacing the 3 rubber lines so I bled the brakes for a second time using a pressure bleeder from Bavarian Autosport (from by BMW days) and was suprised to see such contaminated fluid come out of each wheel. I guess I didn't do such a good job bleeding the first time. The braking (in a long gravel driveway) was firm and solid.

The final round of work before registration and inspection includes replacing the thermostat, replacing the drive belt, replacing the sealed beam headlights with Hella H4 halogens, getting other lights and bulbs in order and adjusting the kickdown cable. After a few easy shakedown miles i'll bring it back home to replace the oil (that may have been compromised by a rich running Solex) and perhaps the rear end and transmission fluids since, although they're fresh, could stir up contaminants since the car hasn't been on the road in 6 years. Next year I plan to have some minor body work done and repaint it the original Jade Green with Rallye side and hood stripes and halogen driving lamps. Perhaps a 4- or 5-speed tranny and 14" wheels will soon follow.

Sorry for the long post. I plan to create a blog documenting the progress in greater (excruciating) detail.

Last edited by tekenaar; 11-29-2007 at 01:00 PM.
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Old 11-29-2007   #2 (permalink)
'72 Opel GT (Sara)
 
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Garage
Cool - can't wait to see the pix - congratulations!

Matt
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'72 Opel GT (Fireglow Orange)

Third Owner, Purchased in 1986
Current Status: Fully Restored
Major Mods: Weber Carb, High Compression Pistons, Electronic Ignition, XM Radio / CD, ADDCO Front / Rear Anti-Sway-Bars, Custom CAI

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Old 11-29-2007   #3 (permalink)
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Exclamation SOB Webers . . . rejetting!

Originally Posted by roundl View Post
After close to two years of off-and-on tinkering in the driveway the '71 Kadett is close to being roadworthy...just in time for winter. A few weeks ago I replaced the original Solex with a new Weber 32/36 DGEV, and improved the engine performance dramatically. I know some people here swear by a well tuned Solex . . .

. . . I plan to create a blog documenting the progress in greater (excruciating) detail.
. . . sounds like you're well on your way to reliabilty, always a good thing. Quick question about your new Weber though, is it a "straight out of the box" carb? . . . i.e. untuned (jetted) for your particular engine?

"SOB" Webers are way rich for our engines and can be significantly improved by rejetting . . . don't even have to remove the carb from your manifold to do it!
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1960: '61 Rekord PII 1.7 3S 3.9 '69 Kadett LS 'sprint' 1.9 3A 3.18
1970: '70 GT 1.9 4S 3.44 '72 GT 2.2SSD 5S 3.44 '72 GT 2.4FI 5S 3.44P
'73 GT 1.9FI 4S 3.44 '75 1900 1.9FI 4S 3.44
1980: '85 Bitter SC 3.9FI 5S 3.44P
2000: '09 Solstice GXP Coupe 2.0 SIDI VVT Turbo 5S 3.73P
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Old 11-29-2007   #4 (permalink)
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Weber carb jetting

Good question on the Weber jets. I reviewed extensively the jetting threads on this site to make sure i was getting what i needed and it ran the way it should. I can't remember the jet sizes off hand but I purchased the carb though carbs unlimited (i believe...i was looking at several suppliers based on advise from some on this site) with the proper jets. I told them my application and they seemed to know it.
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Old 11-29-2007   #5 (permalink)
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Thumbs down About dealer Opel jetting claims!

Originally Posted by roundl View Post
Good question on the Weber jets. I reviewed extensively the jetting threads on this site to make sure i was getting what i needed and it ran the way it should. I can't remember the jet sizes off hand but I purchased the carb though carbs unlimited (i believe...i was looking at several suppliers based on advise from some on this site) with the proper jets. I told them my application and they seemed to know it.
. . . yeah, and Racetep says that too, but, in actual practice, their jetting has still shown too rich evenso. I don't trust any Weber dealer's claims for "correct" jetting on Opel CIH engines . . . they're not the same as BMW fours, most often used as reference!

Only way to be sure is to look . . . always a good practice anyway!
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1960: '61 Rekord PII 1.7 3S 3.9 '69 Kadett LS 'sprint' 1.9 3A 3.18
1970: '70 GT 1.9 4S 3.44 '72 GT 2.2SSD 5S 3.44 '72 GT 2.4FI 5S 3.44P
'73 GT 1.9FI 4S 3.44 '75 1900 1.9FI 4S 3.44
1980: '85 Bitter SC 3.9FI 5S 3.44P
2000: '09 Solstice GXP Coupe 2.0 SIDI VVT Turbo 5S 3.73P
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