22 replies to this topic

[0100]

What do you guys suggest for a starting point for fuel pressure on a 99?

I just installed an AFR gauge and know I have to go off of those numbers but just wanted to know first what number I should start at.

I am at the track right now and will be fine tuning it tomorrow.

What does a stock 99 pressure run?

Thanks!

[mdavis]

I've heard 52-54 is a safe range for pressure. I have mine set there on the advice from others on this site.

[Ron Alan]

Don't quote me but i think stock is right around 60...the above mentioned number is also what I've read

[Jim Drago]

52/54 is normal. You may end up between 48/56 depending on fuel and conditions.

[FlyByYou]

Are you using the one that goes back to the tank?

[MPR22]

In my experience it is not a set it and forget it device. It seems to be temperature sensitive. I have usd both wheeler and. Diesel storm systems.

[Danny Steyn]

This year has produced some interesting data for us. Last year we ran in the 49 - 53 range depending on track and ambient conditions.

Going to the smaller restrict or this year we anticipated that we would need to reduce the FP to get the right AFR. In fact we have observed just the opposite. This year we are running around 55 - 58 psi. Not sure what the explanation is. This gives us an AFR starting at 13.5 at around 3500 rpm (where we start our dyno pulls), dropping down to around 12.2 at 6900 rpm. Anything leaner than that we seem to sacrifice too much torque.

Interested to know what others are seeing I the AFR range.

[Andrew Charbonneau]

This year has produced some interesting data for us. Last year we ran in the 49 - 53 range depending on track and ambient conditions.

Going to the smaller restrict or this year we anticipated that we would need to reduce the FP to get the right AFR. In fact we have observed just the opposite. This year we are running around 55 - 58 psi. Not sure what the explanation is. This gives us an AFR starting at 13.5 at around 3500 rpm (where we start our dyno pulls), dropping down to around 12.2 at 6900 rpm. Anything leaner than that we seem to sacrifice too much torque.

Interested to know what others are seeing I the AFR range.

In my opinion danny a think your tire pressure is the culprit that sright line speed will make changes lol

[FTodaro]

In the early races this year when it was cool Road Atlanta in March for example, I was running 49 or so. now that the temps are going up I will likly have to richen it up some. I have my Air fuel plugged into the traqmate data so I can monitor it. As the temps go up so should the fuel mixture.

[Michael Novak]

In the early races this year when it was cool Road Atlanta in March for example, I was running 49 or so. now that the temps are going up I will likly have to richen it up some. I have my Air fuel plugged into the traqmate data so I can monitor it. As the temps go up so should the fuel mixture.

. Frank it is ther other way around ....

[FlyByYou]

In my opinion danny a think your tire pressure is the culprit that sright line speed will make changes lol

Hey its Von Crack Head off his meds...lol Why do you always have something stupid to say... Oh I know it is what it is. I still want to find you a legal rental car for you to race to show me your skills...lol

What do you do for a living? Do you watch cartoons all day? I though you are Pro Racer.

Gary

[Andrew Charbonneau]

TRY TO UNDERSTAND THIS
[/quote ok gary here we go its you and I
Frist I would like to quote you You said That the tech gusy were paid off by the front runners like myself andrew fudge charbonneau were cheating.
.
second I did finsih highschool and two years of collage decided to open my own busness at the age of 24 will send you that fact not gowing to grad school on mommy and daddys penny
which is ok if there doing it for there children not some snot nose like your self who complains about everythinhg.By the way do you know what a numismatist is bet you dont
I also went back to school last year for auction licence bye the way school was not easy moved from germany never picked up the english language that easy because i have a severe case of dislexia ant turet you fudge asshole sorry that just come out you pile off shit dirt bag sorry agian .

third you dont get the point here they cheated and I called you out just like you called the front runners out.

fouth last year i finished 5th at the runnoffs the car stayed in the shed all day and passed everything I finished second you putz sorry tutret

five how old are you to let a five year old pull you out like i did you must be very short and my have napolean complex not sure

six my comments to you were just you did not do you homework call me a cheater thats funny i will drive any car that you bring and i will spot the driver you choose five horsepower
ps it has to besome one you likes you

seven i dont want worship not a religous man but if care to kiss my feet thats fine

eight by the way worked two years at the buckdent school as an instuctor fo 12 year old ball playes trying to help ernie jr understand what is out there in racing yes people like me and alos people like his father who not JUST SAY SOORY FOLLOW MY FIRST POST YOU MIGHT GET IT YOU POMPAS ASS.

NINE IF I SPELLED SOMTHING WRONG IM SORRY YOU DUMB NO THINKING STUPID LAWYER

[Andrew Charbonneau]

i am sorry get it

[FlyByYou]

You need help...lol

[Muda]

AC - Don't know why you even acknowledge that troll.

[High Chair]

AC - Don't know why you even acknowledge that troll.

I have to agree with Muda.

[Andrew Charbonneau]

AC - Don't know why you even acknowledge that troll.

I GUESS YOUR RIGHT BUT WHAT IS RIGHT IN DANNYS WORDS IM PROTECTING THE CLASS .

AND I WILL BE HERE FOR AWHILE BECAUSE I LOVE THE CLASS

AND I LOVE TO RACE

SORRY IM TOOO OLD FOR THE BIG TIMES MAYBE IN ANOTHER LIFE.

[Andrew Charbonneau]

You need help...lol

GOT YOU BABE

[0100]

Thanks guys for the quick help yesterday. I ended up setting it at 52 and it seemed to be giving me a good AFR reading but sunday was 4 race sessions and I wasn't really paying attention to the AFR to be honest. Now I need a data logger... or maybe I will remove my ballast and put my 5 year old in the passenger seat with a pad and pencil.

[Ron Alan]

Hey its Von Crack Head off his meds...lol Why do you always have something stupid to say... Oh I know it is what it is. I still want to find you a legal rental car for you to race to show me your skills...lol

What do you do for a living? Do you watch cartoons all day? I though you are Pro Racer.

Gary

We don't need a lecture on forum decorum...with all due respect DS. Guys like this just need to be quietly bounced. We all know AC and JT schtick...all in good fun and tolerable. This guy has no business being here...ads zero to anything he has posted to and is not who he says he is or what. Really mods?? Is he, MOOVN and EF the same person?