whats slowing me down?

9

92streetstang

Founding Member

Jun 25, 2002

64

0

6

Apr 17, 2006

#1

• Apr 17, 2006

• #1

I'm wondering were I'm loosing the most power in my setup. I have a GT-40 crate motor with the B303. I have a TFS track heat intake,80mm MAF,24lb injectors,kirban fuel pressure reg. Just installed the intake and I'm not feeling nearly the power gain I expected. I know my stock fuel pump and tb are hurting me but anyone have an idea of how much.

 

whtpny

New Member

Dec 8, 2002

338

0

0

Spokane WA.

Apr 18, 2006

#2

• Apr 18, 2006

• #2

I am sure the stock throttle body is not helping for sure. Especially with the 80mm MAF and the bottle neck to the TB. I would change that and get it dynoed as well. Check and adjust timing maybe? Fuel pressure settings?

 

9

92streetstang

Founding Member

Jun 25, 2002

64

0

6

Apr 18, 2006

#3

• Apr 18, 2006

• #3

Fuel pressure is at about 39 and timing I need to recheck, but was at 14*.

 

W

WLDHRSE

Founding Member

Mar 11, 2001

701

1

19

Elkton, MD

Apr 18, 2006

#4

• Apr 18, 2006

• #4

What kind of 80mm MAF? If C&L borrow a Pro-M 75mm and see what happens.

 

9

92streetstang

Founding Member

Jun 25, 2002

64

0

6

Apr 18, 2006

#5

• Apr 18, 2006

• #5

I have a Pro M already

 

W

WLDHRSE

Founding Member

Mar 11, 2001

701

1

19

Elkton, MD

Apr 18, 2006

#6

• Apr 18, 2006

• #6

Was the intake the only thing installed at this time?

I'm thinking two things about your combo, maybe,
MAF too big, TB too small, together I would think that could cause an issue.

 

DMAN302

My mom says thanks for the pearl necklace.

Nov 8, 2003

2,120

2

59

windsor, Canada

Apr 18, 2006

#7

• Apr 18, 2006

• #7

Should feel pretty solid upper midrange power...is the car AOD? FP and timing look good..that combo should lay down in the 260range. I would pull the codes to see if anything is out of commision.

 

9

92streetstang

Founding Member

Jun 25, 2002

64

0

6

Apr 18, 2006

#8

• Apr 18, 2006

• #8

yes with this install intake was the only thing i installed. how likely is it that i'm starving it of fuel with a stock pump? and not aod its a 5 spd

 

L

luckythirteen13

New Member

Jul 19, 2005

648

0

0

Anaheim, CA

Apr 18, 2006

#9

• Apr 18, 2006

• #9

i guarrenty its your stock fuel pump. youve maxed it out. i had heads and intake on my car with 24# injectors running the stock cam and fuel pump when i got my wide band kit. made a pass down the track and got an afr of 26:1 i added more fuel pressure and afr got a little better. i went so fast as to be running 60psi fuel pressure at idle with vacuum off and it was still about 18:1. thats when i realized that at idle the stock fuel pump could make plenty of pressure but at wot it couldnt keep up and fuel pressure dropped. if you have h/c/i your fuel pump is even worse off then mine was. put in a 255lph pump in the tank and lowered my fuel pressure back to normal and afr was great and it made a ton more power.
get a new fuel pump!!!

 

9

92streetstang

Founding Member

Jun 25, 2002

64

0

6

Apr 19, 2006

#10

• Apr 19, 2006

• #10

ok man sounds good i've already got a pump and tb coming figured what the hell might as well have them. wanting to add a supercharger in the near future anyway. i did find that the timing was off 8* so i set it at 14*. did seem to help my low end. any other suggestions? I also need to get an electric fan cars starting to warm up with upgrades, whats a good fair price fan ?