Reply With QuoteHad a feeling this was going to come up again and some of my response is “been here before”.
Blue/black motor would be better than a red 202 as you pickup a 12 port head as opposed to the red “Siamese ports”. In performance the 12 port would be the better as it would be more efficient and more tuned to performance. A quarter of the reason a 3.3Ltr blue against a 202 red makes more power. Can’t easily swap blue head onto red block as some of the water galleries don’t line up, that’s not to say it can’t be/hasn’t been done.
Second thing is dual throat Rochester carby as opposed to the standard single throat stromie. Rochester is the designed for both power and economy, stromie is one or the other. I like the Rochester on the basis I can set everything I want, mixture, air speed, base idle, choke, idle up and yet its just as simple to work on as the stromie.
Third is the exhaust. Blue motors had twin headers that work quite well at making the exhaust system work more efficiently. Except they have this valve setup in the manifolds to help the engine warm up faster which usually seizes in the closed position strangling the poor thing. Some people ditch the factory stuff for aftermarket pipes and claim some improvement. The old 202 was stuck with the single outlet exhaust which could prove quite of a limiting factor. Twin headers is nothing new, the 186S had them and I think the one before did too (186X2 ?) though they had twin carbies, they were quite toey engines.
Lastly is the ignition. Pointless distributor. This is what caught me before. The stator (coil of wire inside the dizzy part of the pickup) on the blue dizzy had a tendency to break. As a “fix” I thought Holden moved the pickup to the flywheel in an effort to make it more reliable. So I’ve dusted off the commodore service manual and flicked through…. The carby motors had the EST module, that used a speed sensor (crank angle) mounted above the flywheel and three timing pins on the flywheel in collaboration with other engine monitored characteristics, governing ignition timing. That’s why some people suggest that the black dizzy is not able to be retro fitted.
HOWEVER the EFI versions had the stand alone system like the blue motors. The EST gets removed and EFI plugged in and ignition timing returns to the blue solid state system. So you can use a black motor dizzy if you want, just make sure which one it is before you buy it. If you want to check Gregory’s VK service and repair manual, number 222. pp173~177 and p234 in the supplement shows both respective.
Andrew you can make your 202 go better by doing what I did to my 186. Stick all the black motor stuff on your red block. I’ve only electronic ignition left to add but I like the old points system for simplicity and don’t need any more power as it breaks the gearbox enough as is. :roll:
Tech sites....... no... but a guy I know is an engine reco. He helped me with my wild creation so if you need help is only a local phone call away.
Perhaps websearch ?
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