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R33 Boost Spiking

Jezzza

By Jezzza,
in General Automotive Discussion

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Jezzza Enthusiast

Jezzza

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Hey guys

My mate is having an issue with his R33 4door GTST. Currently he is running a stock turbo, i/c, etc etc on a RB25. He has a 3inch dump with full 3inch exhaust.

He is curious why it isnt spiking above 7psi? With the exhaust being 3inch should he get more than 7psi without a boost controller/bleed valve?

His mate has the same car with same setup but with a bolt-on front mount and his goes to 11psi without a boost controller/bleed valve.. just curious why his isn't spiking..

Cheers

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Jezzza Enthusiast

Jezzza

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the actual dump is 3 inchs but it had ridges in it they have been grinded out so in a sense its been high flowed.

it also has no cat conveter in the car i dont no whether thats going to make a differance.

cheers for your help

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