With this set-up how much Psi can I run with my current 550cc injectors
06-19-2011, 02:58 AM
#1
With this set-up how much Psi can I run with my current 550cc injectors
I only plan on running high psi for about 2-3 days and about 5 straight line runs
94 Motor Balanced and Blueprinted
JE Custom Turbo Pistons with 9:1 Compression & 1mm Overbore
Crower H Rods
All ARP Bolts (every thing)
Ported & Polished Head
1mm Oversized Valves Black Nitrate Coated
Bronze valve guild's
HKS Cams, HKS Cam Gears
FMIV Turbo Manifold
Garret Double bearing turbo gt3071r 4" inlet polished
Custom down pipe 3" manderal bent with Vband
External .Tail wastegate
Custom Front Mount Intercooler with HKS Core
Tial Blow Off Valve
Ported & Polished Intake Manifold
Koyo Racing Radiator
Dual fan's 12's
Vishnu Fuel Rail
550cc Injectors Rc injector's
255 Walboro Fuel Pump
Link Engine Management System w/ Laptop Hookup
Custom 3” Exhaust with vibrant muffler
94 Motor Balanced and Blueprinted
JE Custom Turbo Pistons with 9:1 Compression & 1mm Overbore
Crower H Rods
All ARP Bolts (every thing)
Ported & Polished Head
1mm Oversized Valves Black Nitrate Coated
Bronze valve guild's
HKS Cams, HKS Cam Gears
FMIV Turbo Manifold
Garret Double bearing turbo gt3071r 4" inlet polished
Custom down pipe 3" manderal bent with Vband
External .Tail wastegate
Custom Front Mount Intercooler with HKS Core
Tial Blow Off Valve
Ported & Polished Intake Manifold
Koyo Racing Radiator
Dual fan's 12's
Vishnu Fuel Rail
550cc Injectors Rc injector's
255 Walboro Fuel Pump
Link Engine Management System w/ Laptop Hookup
Custom 3” Exhaust with vibrant muffler
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06-19-2011, 03:08 AM
#2
I don't see an afpr on that list. And with all the increased flow of the reworked head/cams + that big of a turbo my answer would be: NOT a lot. Under 15 that's for sure.
Lots of variables are involved as well, so don't expect a precise answer. In fact, don't expect anything even remotely precise.
Lots of variables are involved as well, so don't expect a precise answer. In fact, don't expect anything even remotely precise.
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06-19-2011, 03:11 AM
#4
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You'll tap the 550s out at ~300-310whp, which will probably be around 14psi with that setup. Be careful, use a wideband.
edit: I don't see a wideband. I'll guarantee that you weren't running 19psi safely from a 3071R on 550s at stock fuel pressure. Forged pistons don't give you immunity from being stupid with the tune - it just means the mistake takes longer to show up, and more money to correct afterwards.
edit: I don't see a wideband. I'll guarantee that you weren't running 19psi safely from a 3071R on 550s at stock fuel pressure. Forged pistons don't give you immunity from being stupid with the tune - it just means the mistake takes longer to show up, and more money to correct afterwards.
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06-19-2011, 03:26 AM
#7
I don't see an afpr on that list. And with all the increased flow of the reworked head/cams + that big of a turbo my answer would be: NOT a lot. Under 15 that's for sure.
Lots of variables are involved as well, so don't expect a precise answer. In fact, don't expect anything even remotely precise.
Lots of variables are involved as well, so don't expect a precise answer. In fact, don't expect anything even remotely precise.
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06-19-2011, 03:32 AM
#8
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Don't touch the AFPR, don't touch the boost, don't touch a damn thing. Set it back exactly like your tuner set it, and just drive it. If you want more power, you need more injector and a new tune - you cannot just crank up the boost without compensating for it in the tune.
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06-19-2011, 08:12 AM
#12
Cpt. Slow
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People have argued anywhere from high 10's to mid 12's for good afr under boost.
Guys, not to scare him, but wasn't he at 90% with his injectors party because of his stock fuel pressure? Wouldn't his Afpr change the equation and lower it?
But don't forget what sav said, 90% is already too high for comfort.
Guys, not to scare him, but wasn't he at 90% with his injectors party because of his stock fuel pressure? Wouldn't his Afpr change the equation and lower it?
But don't forget what sav said, 90% is already too high for comfort.
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06-19-2011, 01:31 PM
#16
Take the car to a compitent tuner and have them tune the car to more boost pressure while also increasing the base fuel pressure. It's not just fuel you should be worried about. It's not as simple as turning up the afpr and running mire boost. Your motor will blow up. Unless the csr is tuned for 19 psi DO NOT run thamuch pressure again. Simply turnig up the base pressure will make your whole map richer causing it to run like poo. If you turn up the pressure you need a re tune.
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06-19-2011, 09:01 PM
#19
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Take the car to a compitent tuner and have them tune the car to more boost pressure while also increasing the base fuel pressure. It's not just fuel you should be worried about. It's not as simple as turning up the afpr and running mire boost. Your motor will blow up. Unless the csr is tuned for 19 psi DO NOT run thamuch pressure again. Simply turnig up the base pressure will make your whole map richer causing it to run like poo. If you turn up the pressure you need a re tune.
Just run more boost and make that turbo happy!!! that is how you win
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