Quote:
Originally Posted by ProwlerGT
So it is only the pistons and the flow passages in the heads that are responsible for the compression differences in the two engines - otherwise the engines are the same (aside from the engine mount bracket too)?
LOL - Sorry, but which of you is right? One says rods are different vs same etc... for other parts too? HUHH?  
Rotating assemblies? Meaning pulleys or what else?
I don't know.... perhaps this is from inexperience, but it would seem to me swapping in an already ready to go TT engine would be a hell of a lot easier/cheaper than modifying and upgrading every single part on an NA engine to make it a TT converted. From what I've read the consensus pretty much is that you are better off just buying a stock VR4 and modding it vs converting to a TT from NA due to cost/labor. |
It would be cheaper to just buy all the tt conversion stuff and use your current engine than buying a different engine and then all the tt stuff with it... Sure it'd be easier to just swap in a full TT engine, but its more expensive bc of the cost of the new engine.
Do a search for block differences or tt versus na block.
There are more differences than the ones i listed.
All NA's are 2 bolt, 93+ TT's are 4 bolt
TT's have oil squirters
91-92 have cast cranks, 93+ have forged, regardless of tt or na
Rods are the same
TT has 8:1 pistons, NA 10:1 (which account for CR differences)
TT heads flow better than NA ones
TT cams are different than NA
Valves and associated hardware are the same
Front mount bracket is different on a TT
Water housing on TT has coolant ports for the turbos, however both bolt up the same.