BlackonBlack89
SHO Member
Some do things the right way and some dont. Running a big pump and using an upgrade fpr is the right way
400ft-lbs of torque?
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89 and 90 SHO's had a resistor that cut voltage to the fuel pump at light loads. So if you have an 89 or 90 and are using a larger pump, you will generally be okay. Even later years without the resistor can get around using an aftermarket FPR, but as has been explained, it will cause problems.
Art5
Active Member
ok, so nobody rreally talks about failure without using aftermarket FPR then. Can you put same resistor used on 89,90 SHOs into Gen 2?Does that make sense at all?
and again, if I understand right in our cars fuel system has small path to get to cylinders for anything over 300+ HP, but still don't understand how With this turbo setup there is no problem.
I'm not really trying to save a buck , I just want to understand these things more to see what to do with my ideas about the car.
and again, if I understand right in our cars fuel system has small path to get to cylinders for anything over 300+ HP, but still don't understand how With this turbo setup there is no problem.
I'm not really trying to save a buck , I just want to understand these things more to see what to do with my ideas about the car.
What year is this turbo car? 89 or 90? Also, you are making the assumption that it has zero problems. If it is using a larger than normal pump, and has a stock FPR, and is not an 89 or 90 with the resistor, in time, it will have fuel pressure issues. Easiest/safest/best way to solve those problems for all time is to get a quality aftermarket FPR.
SHOtime2511
CGP
Any 89-95 SHO can get away with a 155lph pump on the stock regulator with no issues.
A 155 is plenty for lower boost.
A 155 is plenty for lower boost.
Art5
Active Member
what exatly do you mean by lower boost?
Think in terms of HP. A 155lph (41gph) pump, feeding 36lb/hr injectors (approx 6 gal per hour per injector, or 36 gal per hour for 6), can support up to 350chp with the injectors at a safe 80% duty cycle.
Art5
Active Member
OH, that i know. I thought maybe you meant something else .
Wow. Just came back to this one...
The fuel pressure creep can also be addressed in the tuning...for those that can do it.
With our SCT our tuning, we can stop the computer from learning idle fuel trims and f'n up the program.
Both the white car and the green car are '91's with a 255lph in the tank and stock FPR's(and now the blue 95 ATX - Next is the white V-8 car - stay tuned). Proper tuning, no issues.
The fuel pressure creep can also be addressed in the tuning...for those that can do it.
With our SCT our tuning, we can stop the computer from learning idle fuel trims and f'n up the program.
Both the white car and the green car are '91's with a 255lph in the tank and stock FPR's(and now the blue 95 ATX - Next is the white V-8 car - stay tuned). Proper tuning, no issues.
SinisterSHO
Rust free
DeaconBlue
SHO Member
Why would you even try to do this when it is 100% effective by simply installing an aftermarket FPR kit from SHO NUT Performance? Why?!?
Cause he's got super sick skillz dawg
If it ain't broke, don't fix it.
Why spend the $$ if it's not necessary?
It also detracts from the Sleeper aspect of the underhood impression.
DeaconBlue
SHO Member
You mean to tell me that you pride yourself on being to fabricate custom pieces/parts that hides everything else with this setup, yet you can't seem to realize the logic nor find a way to hide a much superior and more reliable mechanical method that truly addresses the root cause and actually solves the issue - which by the way would also make tuning the engine much simpler as well ?!?
Sounds more like a "not invented here" syndrome to me.
Sounds more like a "not invented here" syndrome to me.
RonPorter
SHO Club of America
Eh, probably the same reason I was gonna spend $200/wheel to widen slicers out to 7.5"......
There certainly is nothing wrong with putting it on, I simply don't feel it is necessary when the issue can be fixed with proper tuning.
Tell you what. I recommend that you can put it on your car.
It's entirely up to you, Sir. If you want it on your car, by all means, lets support Josh and his invations in the SHO community. In my kits, it is not required and I don't include it.
All though I haven't checked in the last 15min, this is still a free country...despite our president's and our congress' best efforts.
If people did not spend money unnecessarily, you would not be building FI SHO's. The few dollars that a quality FPR adds to a $6-7000 project is hardly reason to discourage a customer from getting one.
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93rev2sev
SHO Member
If that was the cause for his line of "thought", wouldn't he have installed the FPR AND tuned out the cause of the idle creep?
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Shoaz
Studly dood
On the other hand, having the proper FPR for the application avoids having to band-aid around it by getting hokey with the tune. Leaving the maximum degrees of freedom in the tune for things that are actually tune related (rather than working around having the wrong FPR) seems a lot cleaner to me.
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