I am nearing the end of the 1.9 to 2.4 conversion (I hope).
If you do go this route I do happen to have a lot of the parts that one might need to do this. Like dual springs, rings, titanium retainers, pistons, valves etc because most of the places I bought things sold the stuff in sets of eight so I have 4 of everything left over.
I will sell mine for exactly 1/2 of what I paid, which would be cost. However if you want to get your own that is all fine too. Here are the pistons that I am using and where to get them.
My valves are Chevy .184 and .150ies, rings molly, I think the springs are Chevy parts too. Email me if you want [email protected]
On the other hand all the engine parts are at the machine shop except the crank which that should be coming soon from welding and offsetting way up in Detroit. If you wait a bit I will be able to tell you if this all works when undertaken by a clueless duffer like me and not a professional like Bob who knows what he is doing as it is second nature to him.
I guess it depends on who does it too. I am sure Rodgers Opel engineering could make you one up or OpelGTsource.
Having someone who doesn’t know Opels means you end up like me reading out of a manual and quoting posts from this board as you tell a machine shop “how to put in a cam” or “how to put a head” on because you will have too. The shop won’t like you reading to them out of a book “cause they know Chevy’s” and when they treat it like a Chevy they will put things together wrong. It is really tough to tell a professional to “watch out for spring float” if you have no idea what that is in the first place.
Unless you know what you are doing and know the Opel engine yourself (unlike me) you will have to visit your shop week in and week out till you make friends with them. Take them a case of beer and sit down and make them read Bob’s stuff and some of the posts here or from the yahoo group where they talk about what happens to engines that are not put together right…. Make sure the person you tell is the one who will be putting it together and not the kid in the back or better give the kid a copy of the stuff to read too cause there is a far better chance that a kid will read it. Give the kid one six pack if 21.
I am doing this way simply because (sadly) I am not overly affluent and it seems to be the most cost effective way of doing this. Just buying a 2.4 would be far easier but I think I will have an equally good engine with a ported head and welded up reground cannon intakes (finished today! Thanks again for the tip Bob) and dual Weber 40dcoes for less than the cost of a used 2.4 from Opel Gt Source. That said there are many parts that opelgtsource can get you that you don't have to buy eight of and I have gotten many things from them like rod bolts, gaskets sets, bearings etc.
This way is far cheaper monetarily but there is lots and lots more worry and if you are doing this one pay check at a time like me maybe the worry may not be worth the hassle.
If my engine works in real life and not just on paper I will gather up all the parts and receipts and sell them.