Gains from 75mm TB and new upper intake plenum on 99 GT?

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ThrowedOff

New Member

Nov 16, 2006

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Nov 29, 2006

#1

• Nov 29, 2006

• #1

I am considering purchasing a 75mm TB and an upper intake plenum for my 99 GT, and was wondering what kind of hp/tq gains I could expect if I were to do so... The car is stock except for CAI and flowmaster mufflers for now.

Also, what kind of additional gains would I see from adding a TB spacer + intake spacer to the above combo?

Right now I'm looking to spend $300 or so on something, and it looks like I can get all 4 of these for under $300. It seems that this would give me pretty good bang for my buck so to speak, considering it's price, but perhaps you guys have some better suggestions?

 

TrueBlue03

Member

Dec 9, 2003

372

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Bay Area, CA

Nov 29, 2006

#2

• Nov 29, 2006

• #2

i dont know the exact hp, but you definitely feel the TB & Plenum above 3500 rpms

thats a good deal. Take it!

 

myponyrocks

I have more billet on the Stang than most women ha

Apr 18, 2004

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Nov 29, 2006

#3

• Nov 29, 2006

• #3

I'd pass on the intake spacer, just my opinion.

you can expect any where from 6-12 hp gains in the band and at the wheels assuming. What brand?


*EDIT* Oh and the most important part... improved throttle response

 

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bluextc

New Member

Feb 12, 2006

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South Jersey

Nov 29, 2006

#4

• Nov 29, 2006

• #4

I added the tb/plenum and xcal 2 all at the same time so I can't single out the tb/plenum, but I can tell you there was a significant difference when I did it.

 

sgarlic

Founding Member

Apr 21, 2001

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Nov 30, 2006

#5

• Nov 30, 2006

• #5

I noticed a nice gain when I put the 70mm Accufab combo on in the higher RPM range. I'll get it redyno'd one of these days.

 

Jsun3701

New Member

Dec 10, 2004

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Virginia

Nov 30, 2006

#6

• Nov 30, 2006

• #6

Just like they said, you will notice it around 3-4k, I have that set up right now. But dont get the spacer, it doesn't fit with the BBK plenum I have. I would think it may be the same for you.

 

twogts4us

15 Year Member

Apr 1, 2004

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Dunedin, FL

Nov 30, 2006

#7

• Nov 30, 2006

• #7

sgarlic said:

I noticed a nice gain when I put the 70mm Accufab combo on in the higher RPM range. I'll get it redyno'd one of these days.

Click to expand...

Same here - at 3K + RPMs, it just seems to find new life and pulls noticably better.

 

HoustonGT

Gilded Gelding

Apr 6, 2003

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Houston

Nov 30, 2006

#8

• Nov 30, 2006

• #8

Hmmm, interesting. This makes we want to dig into the S/C fund and get a plenum and TB...After all, it's a supporting mod for the supercharger anyways

 

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bluextc

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Feb 12, 2006

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South Jersey

Nov 30, 2006

#9

• Nov 30, 2006

• #9

HoustonGT said:

Hmmm, interesting. This makes we want to dig into the S/C fund and get a plenum and TB...After all, it's a supporting mod for the supercharger anyways

Click to expand...

Do it! Add a little fun while you wait for the s/c!

 

HoustonGT

Gilded Gelding

Apr 6, 2003

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Houston

Nov 30, 2006

#10

• Nov 30, 2006

• #10

bluextc said:

Do it! Add a little fun while you wait for the s/c!

Click to expand...

Well, if i run a 13.4 hopefully tomorrow, then MAYBE with Drag Radials on 15" wheels and with the Plenum/75mm TB Combo, i'll POSSIBLY have a freak chance of 13.0 or 12.9....That would be