How much Boost is safe on a stock engine.
#1
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From what I have seen and read 12 psi is completely fine on a stock engine and really if you want anymore power you have to get forged pistons and rods. Can a stock engine handle like 15 psi? If it can how well can it handle it. If you run 8 or 12 psi usually then boost up to 15 sometimes would it hurt?
#8
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This was on the same fuel setup I have now, minus the 330's...I was running 270's from a KA24DE. Engine was perfect until the day it died, still had 170-165-170-170 compression across the board ( 3 days before the engine blew ). If it wasnt for that 25psi spike in 4th gear I think that little 1.6L may still be kicking.
#11
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Combination of 2 turbos...one was a T3 S60 48/60. The other was a T04E 40 trim .48 stage 3 turbine. I ran the S60 for 1 1/2 years and the 40 trim for 6 months or so. I also ran a Greddy before that @ 15psi. Mind you I bought a lot of race gas to run these pressures...but thats when it was 3.30 at the pump. I ran 12psi 1/2 the time and 18psi the other 1/2 of the time.
18psi, stock ecu, stock engine, 270cc injs...You don't really like to play by the rules, do you?
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#19
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Very interesting, and tempting. Unfortunately I will run out of injector by about 14-15psi. I'd love to pick up some 650cc's and a 3071R and some WI an see how far I could take the stock 1.6 on pump gas.
18psi, stock ecu, stock engine, 270cc injs...You don't really like to play by the rules, do you?![bow down](https://www.miataturbo.net/images/smilies/bowdown.gif)
18psi, stock ecu, stock engine, 270cc injs...You don't really like to play by the rules, do you?
![bow down](https://www.miataturbo.net/images/smilies/bowdown.gif)
![Biggthumpup](https://www.miataturbo.net/images/smilies/biggthumpup.gif)