JustenGT8
New Member
- Messages
- 2,432
- Location
- Canberra, Australia
My UZ's boost limit - 700hp!!!!!
Well as some of you know i have been looking to add to the current boost i run (13psi).
I hit the dyno for some proper tuning but the initial road tests were a bit interesting.
I can hit 15+psi in a blink bit 15 seems to be the limit of decent running as at this level it develops an obvious miss.
It's not det so could ignition break down but as i was running a 1.1mm gap on 13psi no probs and have now closed down to 0.8mm i don't think so. I actually think the issue is the soft valve springs not holding the higher boost.
Hopefully the dyno will shed more light but if it is the valve springs then only way i'll get m ore hp is a leaner tune and more ignition advance....stay tuned i guess.
Well as some of you know i have been looking to add to the current boost i run (13psi).
I hit the dyno for some proper tuning but the initial road tests were a bit interesting.
I can hit 15+psi in a blink bit 15 seems to be the limit of decent running as at this level it develops an obvious miss.
It's not det so could ignition break down but as i was running a 1.1mm gap on 13psi no probs and have now closed down to 0.8mm i don't think so. I actually think the issue is the soft valve springs not holding the higher boost.
Hopefully the dyno will shed more light but if it is the valve springs then only way i'll get m ore hp is a leaner tune and more ignition advance....stay tuned i guess.