OK guys- The dual turbo 350 project is gaining steam,,, maybe even heading for the home-stretch. I need an absolute 100% answer on this one, no guessing. I do know for a fact that 3.8 pistons will physically fit into the 350, so assuming the aftermarket forged turbo slugs will fit is a natural. But I need a difinative answer on compression ratio I'll end up with. What are the differences on the compression height of the two pistons? Ultimately, what I'll need is somewhere between 7.5 to 8:1 compression without the piston sitting a mile down in the hole, messing up quench and all. Will the 3.8 pistons give me what I need? or am I doomed to lay out mountains of cash for full customs? The turbos wll be Garrett T-04's, and the cam will be a crower 292/304. Induction will be via a pair of holly 600's Naturally, the block will be O-ringed, but I'm looking for advice on head gaskets. Hey JB, if your reading this, shoot me a PM about the forged rods you were working on a while back... Prices still up close to $1000??? May also be looking at a set of heads like Ron's from you.... Or maybe a little milder... Dont need extreme breathing with forced induction :Smarty: After I finish this, the new single plane intake is next :TU:
Jiminy Christmas guys !! Take a few moments and order some parts catalogs. Call or e-mail Federal-mogul, Comp, whoever, intead of all this guessing. From Federal-Mogul's X-3009, 1996 catalog: The 231-turbo H521NP (hyper) piston has a comp dist of 1.800" and a dish vol of 24cc. The 231-turbo L2481F (forged) piston has a comp dist of 1.825" and a dish vol of 24.5cc. The 350 10:1 L2343F (forged) piston has a comp dist of 1.852" and a dish vol of 8.4cc. The 350 8:1 H644P has a comp dist of 1.80" and the 9.5:1 H522P has a comp dist of 1.855.
Thanks guys. The intake is a complete cistom piece. I started out wanting a long runner ram style with an integrated inercooler, but it was just too much work, ended up with a sheet metal single plane.
3.8 turbo piston in 350: Remember the 350's parent was a 300 which used the same piston as the old odd-fire 225 V6. There was no turbo piston that I know of for that engine. When the 231 V6 changed to even-fire the rods were paired on the same throw. This meant that something had to be offset, I think it was the location in the piston where the rod connects. I am sure that the rod its self was not off-set one end to other. A look at V6 and V8 would show the difference. Diver
i have attahced the info I have from the turbo pistons I just bought. I only spent a little bit of $ to get these so I have nothing to loose! Thanks fo the concerna dn info though. Attached info:
