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Originally Posted by howslowcanyougo
You saying a 7 bolt can go to 36 psi and 450 HP or just up to 18 psi?
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You could probably do 36psi on a 7-bolt, if you put in some ARP head studs. You can't judge things by psi, how much actual power it makes, how high you are reving the motor and the amount of knock/detonation are much more important than the actual boost being run. Barton made 450whp on his stock internal 7-bolt. The record on a stock internal 7-bolt is around 550whp. The main limitation on the 7-bolts is the smaller rods, even though they seem to be about the same size at the EVO 8 rods and people are pushing 500whp on those.
The 6-bolts have much larger rods stock. I don't know how much they handle, but Andy Nash on here ran in the mid 500s at the wheels for a long time with his factory internal 6-bolt.
If you do a 2.4l, you would be putting aftermarket parts in it anyways.
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