Have a car with an Iron Duke or Tech 4 that's being a pain in the butt? You want your car to go faster and need advice or help? Today is your lucky day! Iron Duke club is for all owners of Duke/Tech 4 powered autos and we will try to help out if we can.
Start with the S-10 block. They're stronger. You will have to address detonation as well. the Duke is prone to it any way. The turbo will only make it worse.
Ok thanks for the info. I had forgot I'd joined and posted that message! It's sad that these are so weak compared to the V6 engines. You can boost them hard
Check out this link: http://ironduke7.tripod.com/IronDuke.htm It tells the difference in the duke motors that were were built, like the marine block or postal
... The stock crank will fly apart at 150hp, its trash. A marine 3.0 crank(with some machining, although I dont think it will work in a FWD) will hold up to