has anyone done or have thought about boring out there gtp
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09-22-2009
has anyone done or have thought about boring out there gtp
09-22-2009
I don't think that you can bore the motors out a whole lot. There is a 4.2L stroker kit out there somewhere, mostly in Australia I think.
Originally Posted by TLSheff
09-22-2009
Yup...it bores it to 4.25 liters...but the kit is somewhere in the neighborhood of nearly 4 grand. You can do DIY turbo build for less than that...OR...probably a solid low 12 sec M90'ed car.
09-22-2009
I thought it was like 4.6l, but either way its way to much money for what little gains you get.
09-22-2009
just did a quick google search and found this, they start at like $2600, and go to 3000+
Swan Racing Service 3
09-22-2009
ok thanks, only reason i ask is because at we school we got to the chapter of cams and pistons and all that and we had to solve equations for boring a 5.0 mustang so i thought bout our cars
09-25-2009
Can't...I tried...head pattern is different.
09-26-2009
what about a 4.3 crank in a 3.8???
09-26-2009
Completely different motor, 4.3 is based off the 350, the 3.8 is it's own beast.
Originally Posted by TLSheff
09-26-2009
im saying to use the 4.3.
09-26-2009
How much fabrication, if any, would be needed to put a 4.3 in?
09-26-2009
about as much fabrication as it would be to bore out a 3.8 to a 4.2 block. probably less because motor mounts are easy.
09-26-2009
Not sure if it helps any, but mine's bored .020" over, and I don't think there was much of a difference between that and stock size. Of course, I can't really tell that well, because I raised the compression to 9.5:1 as well as fully rebuilt and balanced the motor.
So, unless you're planning on changing to a set of aftermarket pistons and doing a full rebuild, I don't think it's worth it just for the slightly increased displacement.
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