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> Fuel Pressure Regulator, PSI setting ?????
post Aug 16, 2003 - 4:25 PM
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3TST



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OK, I'm in the process of installing my aftermarket fuel pressure regulator.
Installation seems pretty straight forward.
However, when I come to set it what PSI can I go to?
The manual states between 38-44 PSI as standard.
Can I increase the PSI over 44, if so to what PSI?

Also, what PSI can the standard Fuel Pump cope with?

Any help would be greatly appreciated.

BTW: I have a '97 ST with standard injectors, an Injen IS2040 intake, Denso Idridium spark plugs and Magnecor KV85 spark plug wires.
 
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post Aug 18, 2003 - 8:28 PM
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west_minist



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QUOTE (SpedToe169 @ Aug 17, 2003 - 10:46 PM)
QUOTE (west_minist @ Aug 17, 2003 - 2:33 PM)
QUOTE (vphmc @ Aug 17, 2003 - 12:34 PM)
West_minist thanks for the info.

I think I'll start at 40 PSI considering I have an intake on (increased air flow).
Then, after I have everything I want installed, I'll get the car dynoed and play around with the pressure to see what the best setup is.

Get a Autometer A/F Ratio meter.

That will help you. You do not really have to dyno to feel the results. Test driving and drving behind your car will let you know.

Expect some back firing, but not way too much where gas will be wasted.

I look this. smile.gif

That is totally incorrect. You absolutely CANNOT tune a car properly by the seat of your pants. Don't even bother trying, you'll just mess it up. The autometer a/f gage is also NOT A TUNING TOOL. You can't use a narrow band O2 sensor to accurately tune the a/f ratio due to the sensors non-linearity. Get the car built, get it running and drive it carefully to a dyno that has a WIDEBAND O2 sensor. There you will be able to correctly and safely tune your car. That is the only way to do it right and its well worth the couple hundred bucks it will cost.


I love that word "absolutely"

Why spend that moeny with other mods are needed. Set a basic psi with the autometer help and then go for a full tune on the dyno.

But in no means a dyno is needed.

I know that there are not linear and will not operate properly at 100% throttle.

I am aware of wide band o2 sensors.

The aim here is to get to sterio. and be alittle rich, but not too rich and never be to lean

Even if 100% rich, so what! mad.gif

All that will happen is black smoke, hard starts, and lost of HP & Tq and most of all, wastage of gas.

My advice also to him is to check his mileage and see if your o2 sensor will need replacing. This will take full advantage in this first step of tuning.

This post has been edited by west_minist: Aug 18, 2003 - 8:39 PM

Posts in this topic
- 3TST   Fuel Pressure Regulator   Aug 16, 2003 - 4:25 PM
- - west_minist   I think the standard psi is 35+. You can set to a...   Aug 16, 2003 - 4:46 PM
- - 3TST   West_minist thanks for the info. I think I'll...   Aug 17, 2003 - 12:34 PM
- - ToYCeLi8   I'm getting a SAFC II for my st-185 swap. What...   Aug 17, 2003 - 1:09 PM
- - 97sccelica   QUOTE (ToYCeLi8 @ Aug 17, 2003 - 11:09 AM) I'm...   Aug 17, 2003 - 2:12 PM
- - ToYCeLi8   QUOTE (97sccelica @ Aug 17, 2003 - 12:12 PM) QUOTE...   Aug 17, 2003 - 2:24 PM
- - Lar-   QUOTE (vphmc @ Aug 16, 2003 - 9:25 PM) OK, I'm...   Aug 17, 2003 - 2:33 PM
- - Lar-   QUOTE (ToYCeLi8 @ Aug 17, 2003 - 7:24 PM) I won...   Aug 17, 2003 - 2:38 PM
- - west_minist   QUOTE (vphmc @ Aug 17, 2003 - 12:34 PM) West_...   Aug 17, 2003 - 4:33 PM
- - 3TST   In order to play it safe, I'm going to initial...   Aug 17, 2003 - 7:36 PM
- - SpedToe169   QUOTE (west_minist @ Aug 17, 2003 - 2:33 PM)Q...   Aug 17, 2003 - 10:46 PM
- - 3TST   Thanks for the advice. I installed my Cosmos Raci...   Aug 18, 2003 - 6:15 PM
- - west_minist   QUOTE (SpedToe169 @ Aug 17, 2003 - 10:46 PM) ...   Aug 18, 2003 - 8:28 PM
- - SpedToe169   QUOTE (west_minist @ Aug 18, 2003 - 6:28 PM)I...   Aug 18, 2003 - 10:45 PM
- - snadman   Toyceli8, don't bother with the SAFC2. How abo...   Aug 19, 2003 - 12:36 AM
- - 3TST   One very very basic thing that has been overlooked...   Aug 19, 2003 - 5:08 AM
- - west_minist   I believe unlike you, he is not going to be racing...   Aug 19, 2003 - 6:51 AM
- - ToYCeLi8   QUOTE (snadman @ Aug 18, 2003 - 10:36 PM) Toyceli8...   Aug 19, 2003 - 3:16 PM
- - west_minist   It replaces your ECU and offer you flexibility in ...   Aug 19, 2003 - 4:26 PM
- - 98celica3   if anyone needs a FPR let me know. i have one with...   Aug 19, 2003 - 9:34 PM
- - trouble_st   QUOTE (ToYCeLi8 @ Aug 19, 2003 - 12:16 PM)QUO...   Aug 20, 2003 - 2:30 AM
- - Silver94CelicaOwner   While we're on the topic of fuel pressure regu...   Aug 20, 2003 - 1:45 PM
- - west_minist   QUOTE (Silver94CelicaOwner @ Aug 20, 2003 - 1:45 P...   Aug 20, 2003 - 3:30 PM
- - FallenHero   Stand alone systems just cost so much... If I were...   Aug 20, 2003 - 7:28 PM
- - Silver94CelicaOwner   So what exactly will a fuel pressure regulator do ...   Aug 21, 2003 - 1:04 AM
- - 3TST   The AFPR (Adjustable Fuel Pressure Regulator), as ...   Aug 23, 2003 - 6:01 AM
- - Silver94CelicaOwner   Thanks vphmc, thats the kind of response i was hop...   Aug 23, 2003 - 6:51 PM
- - 3TST   This is where I would start ... First of all, you ...   Aug 24, 2003 - 3:27 PM


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