Stroker crank

[Scott205]

stroker crank questions

Since it will probably be a year until i start rebuilding my engine, thought i would ask a few questions. Why the 3500 crank? and are you sure any good machine shop would know what to do, what should i ask for? What about the 3900 crank? anything different about the 2.8 and 3.2L DOHC engines in the CTS and other various worldwide GM cars?

thanks

[Superdave]

I recently looked into having my extra 3400 crank welded and offset ground. The shop was sure that he could get me up past 3.5l. He wasn't sure about the clearance for the crank in the block tho.. things would probably have to be altered a little. It can be done though... A buddy just upstroked a 4.3 S10 quite a bit, the engine hasn't been started yet but with all the work he put into it they're expecting 350-400 HP N/A

[SappySE107]

The 3500 crank is forged steel and heavy as hell. I don't remember seeing any numbers on the crank though. The 3500 block is notched for the connecting rods so I would expect to look into that area for block mods. If you have a pushrod, just use a 3500 block. 3900/3500 based on 3900 are longer blocks so the crank and cam and intakes and such won't work.

Not sure on the new DOHC stuff though but I doubt any of that swaps either. Hard to find anything cheap to experiment when it comes to the newer engines. The 3500 non VVT is actually decently priced for what it is.

I would take my crank in to be redone and all, but I want to use my 3500 block entirely so it won't be getting any of that done. At most I could have the rod journals redone to stroke it and use different rods. However, the stock 3500 rods are really nice as it sits and the rod/stroke ratio is 1.78 vs 1.72 for the gen 3 motors.