A4 block bored .60 Over

[Lyncher]

Stroked/Turbo A4 block bored .60 Over..timebomb?

Hi, I am looking at a 1990 gt with an A4 block that has been bored .60 over. First could someone please tell me what the displacement is? I have interest in this mustang mainly because of the A4 block, it is very clean and repainted, but I have a couple concerns. I plan on running the Hellion turbo kit and stroking the motor. Is it still possible to stroke a motor that has been bored .60 over, and would it still be reliable? And also...would the stroked motor beable to withstand the t76 turbo at a fairly high boost without risk of cracking. I am looking for about 700rwhp...so will the block be ok or is there a risk of cracking it. TO my understanding an A4 block can take as much as 1600 hp but I was unsure what the reprecutions(spelling?) would be after stroking and boring. Hopefully that wasnt too confusing lol thanks a lot in advance !

 

[txstang84]

a 0.060" over 302 will yield 310ci. Last time I read the A4's boring limit is 0.060" though...you could potentially stroke it out, but the A4 is basically a better Boss 302 block and not quite as good as the R302. yes, it has the thicker oil pan rails, and 4 bolt caps on 2,3, and 4, but if it's already punched out, I wouldn't go any farther with it.

 

[Lyncher]

a 0.060" over 302 will yield 310ci. Last time I read the A4's boring limit is 0.060" though...you could potentially stroke it out, but the A4 is basically a better Boss 302 block and not quite as good as the R302. yes, it has the thicker oil pan rails, and 4 bolt caps on 2,3, and 4, but if it's already punched out, I wouldn't go any farther with it.

I am a litle confused with your wording but....I do not want to bore it anymore..I just want to stroke it then turbo at about 12 psi

 

[txstang84]

lol, what part doesn't make sense?

I'd say you'd probably be ok, just ck the wall thickness on the bores. but there are probably people in here that have run A4's in the past that would be a better source of info

 

[Lyncher]

lol, what part doesn't make sense?

I'd say you'd probably be ok, just ck the wall thickness on the bores. but there are probably people in here that have run A4's in the past that would be a better source of info

lol idk i read it now it it seems just fine..i probably just had my head up my ass b4 lol...hopefully some of those people will help me out here

thanks for your help though

 

[txstang84]

I'm betting Rick91Gt would be a great source for that info-from my understanding, he builds alot of race motors...

 

[Lyncher]

alright thanks...hopefully he will chime in...if not i can always pm him