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Hi all got a 2.5 sti block and was going to run that with my sti version 5 heads . What put me off was the matching of head to block and compression ratios etc . Now thinking more along the route of using the crank and rods from the 2.5 in my 2.0 block . My goal is 400BHP so the 2.5 sti crank and rods should be good for that . My question is what pistons will i need ? Also i assume the same thickness headgasket as currently used will suffice ?
v5 heads work very well with 2.5 block. For the cost i'd closed deck convert the block and put a decent set of rods in it or you will regret not doing them later.
Hi all got a 2.5 sti block and was going to run that with my sti version 5 heads . What put me off was the matching of head to block and compression ratios etc . Now thinking more along the route of using the crank and rods from the 2.5 in my 2.0 block . My goal is 400BHP so the 2.5 sti crank and rods should be good for that . My question is what pistons will i need ? Also i assume the same thickness headgasket as currently used will suffice ?
I would ring one of the engine builders like Andy Williams , or engine tuner etc an get some advice as they know exactly wats required to suit your build . costs nothing for advice from the professionals
Wouldn't you need custom pistons to get the right height with 2.5 rods? In essence you're trying to build a 2.1 stroker engine hence best buying the correct parts off the shelf
Wouldn't you need custom pistons to get the right height with 2.5 rods? In essence you're trying to build a 2.1 stroker engine hence best buying the correct parts off the shelf
Just need to pick the right ones, off the shelf mahle power pack will do the job
Cheers Mick do you mean 2.5 rods or 2.0 rods ? Any idea on part numbers ?
the 2.5 and 2.0 turbo rods are the same length @ 130.48mm centre to center.
Bolt type rods are stronger than the earlier nut type rods.
The 4032 grade mahle stroker pistons are SUB193642/16 for 92.50mm
The higher grade 2618 for extreme applications are SUB193642P16 for 92.50mm
2.5 crank and rods in 2.0 block . What pistons ?
