Need Boost Advice

CDUB13

New Member

Aug 19, 2013

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Aug 19, 2013

#1

• Aug 19, 2013

• #1

I have 99 GT with a Vortech S Trim Charger running 6psi. The car only has 58k miles and has been sitting for some time now. Might have put 200 miles on it in 8 months. It's time for a tune and I have been thinking it's time to upgrade to #39 cobra injectors and changing the pully to run 8psi. The car has 3" Pro Chamber H-Pipe and 3" Flowmasters. Is it worth the time, $ and strain on my stock motor?

 

Last edited: Aug 19, 2013

D

Deleted member 38176

Aug 19, 2013

#2

• Aug 19, 2013

• #2

What are you #'s and ET's on the current setup?

 

CDUB13

New Member

Aug 19, 2013

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Aug 19, 2013

#3

• Aug 19, 2013

• #3

No clue. Car hasn't been to the track or on a dyno in 10 years. It feels like it is cutting in and out when I get on it in 4th and 5th. Taking it to Houston Performance this week. Just trying to figure out if spending the extra $600 to upgrade the injectors and pully is worth it. The car has been boosted for 12 years without a problem. I just figured if I ever was going to make more power, now is the time to do it while installing the new tune. I'm guessing 320-350 hp with the new tune at 6psi and maybe 350-370hp on 8psi. Just based on what I have read.

 

flstang65

10 Year Member

Dec 6, 2007

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SE Georgia

Aug 19, 2013

#4

• Aug 19, 2013

• #4

I would go with 42# and a fuel pump

 

D

Deleted member 38176

Aug 19, 2013

#5

• Aug 19, 2013

• #5

Flstang brings up a good point. What does your fuel system consist of? I definitely wouldn't run 8psi on the stock pump and I'd go no smaller than 42# injectors

 

CDUB13

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Aug 19, 2013

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Aug 20, 2013

#6

• Aug 20, 2013

• #6

I should probably just leave it the way it is and get the new tune. Have any of you had any experience with Houston Performance?

 

flstang65

10 Year Member

Dec 6, 2007

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SE Georgia

Aug 21, 2013

#7

• Aug 21, 2013

• #7

You can always have a little bit bigger injector and fuel pump than what you need and write the tune accordingly. My take on it is, id rather have something a little more than what I need and have it work efficiently rather than have something maxed out(I know that is not always the case though). On the flip side, you will have a better base to build on later.

 

CDUB13

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Aug 19, 2013

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Aug 21, 2013

#8

• Aug 21, 2013

• #8

Agreed. I am upgrading the fuel pump and injectors Friday. Going up to 8psi as well.

 

D

Deleted member 38176

Aug 22, 2013

#9

• Aug 22, 2013

• #9

CDUB13 said:

Agreed. I am upgrading the fuel pump and injectors Friday. Going up to 8psi as well.

Click to expand...

Glad to hear it. The fuel upgrades will most likely solve your cutting-out issues at higher RPMS. What fuel pump did you decide to go with?

 

CDUB13

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Aug 19, 2013

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Aug 22, 2013

#10

• Aug 22, 2013

• #10

Walbro, because of the price.