GT-40 intake on stock motor, more power?

yelowjaket · 02-18-2003, 01:38 PM

I'm going to have to replace my intake gaskets on my stock 5.0, and i figured what the hell, if i'm goin to take it off i might as well as buy a better intake. I have a BBK 65mm throttle body, will that and a GT-40 intake make any difference any performance on an otherwise stock engine? I do have BBK exhaust and Flowmasters but everything else is stock as far as induction. So will i be wasting my money?

chuck88 · 02-18-2003, 04:40 PM

I have an 88GT with GT40 intake (lower is Ported). I recommend the intake especially if you plan on heads or blower in the future.

OK that said, here is the negatives I have had.
As soon as I installed the intake I discovered:
a wicked surging idle
had a backfiring problem (thought I sloved it by adding more fuel to the mix)
Poor gas mileage
a loss of torque
stalling when hot in toll booths

I recently got it dyno tuned (240 hp, 300 lbs of torque) and the surging idle is gone, the torque is back, & so is the back firing (my tuner thinks I may have a sensor problem).

Now I do not have mass air and I am in the process of bringing it back to the tuner (to solve the back firing problem). I am also considering heads, cam and a mass air conversion.

Yes I would recommend a GT40 intake.

Chuck 88

yelowjaket · 02-19-2003, 01:38 PM

alright, thanks for your opinion on the intake. i've got one question for you. you said you lost some torque, how did you get it back? some simple tuning?

Ackbar00 · 02-20-2003, 12:14 PM

If you are going to buy a new intake, dont get a GT-40. They are like 600$ new. You can get a TrickFlow TrackHeat of Edelbrock Performer for around 350$ and have money left over for pullys and such. Now dont get me wrong(I had a GT-40) its a good intake, just not 600$ new good. I bought mine used for 250$. Just a thought.

drudis · 02-20-2003, 04:15 PM

Years ago I did the Cobra intake. Looked at the GT40, but it is too big on a stock motor. I was _very_ pleased with 237rwhp on the dyno.

chuck88 · 02-20-2003, 07:00 PM

Yellow jacket asked:

alright, thanks for your opinion on the intake. i've got one question for you. you said you lost some torque, how did you get it back? some simple tuning?

__________________
I had it dyno tuned they deserve the credit for getting my torque back

chuck 88

02-18-2003, 01:38 PM	#1
yelowjaket Registered Member Join Date: Aug 2002 Location: Phoenix, AZ-USA Posts: 114	GT-40 intake on stock motor, more power? I'm going to have to replace my intake gaskets on my stock 5.0, and i figured what the hell, if i'm goin to take it off i might as well as buy a better intake. I have a BBK 65mm throttle body, will that and a GT-40 intake make any difference any performance on an otherwise stock engine? I do have BBK exhaust and Flowmasters but everything else is stock as far as induction. So will i be wasting my money? __________________ 90redGT -Flowmaster mufflers -BBK 2.5" H-Pipe w/cats -BBK equal length shorty headers -K&N -BBK 65mm Throttle Body -Edelbrock performer 5.0 intake -3.73 gears

02-18-2003, 04:40 PM	#2
chuck88 Registered Member Join Date: May 1999 Location: Wood Ridge NJ USA Posts: 341	I have an 88GT with GT40 intake (lower is Ported). I recommend the intake especially if you plan on heads or blower in the future. OK that said, here is the negatives I have had. As soon as I installed the intake I discovered: a wicked surging idle had a backfiring problem (thought I sloved it by adding more fuel to the mix) Poor gas mileage a loss of torque stalling when hot in toll booths I recently got it dyno tuned (240 hp, 300 lbs of torque) and the surging idle is gone, the torque is back, & so is the back firing (my tuner thinks I may have a sensor problem). Now I do not have mass air and I am in the process of bringing it back to the tuner (to solve the back firing problem). I am also considering heads, cam and a mass air conversion. Yes I would recommend a GT40 intake. Chuck 88 __________________ So what if its "midlife crisis". Wife, 2 kids, busy job, "fixer upper" house, and I still have time for the Mustang!!! I Love my kids!!!

02-19-2003, 01:38 PM	#3
yelowjaket Registered Member Join Date: Aug 2002 Location: Phoenix, AZ-USA Posts: 114	thanks for your opinion alright, thanks for your opinion on the intake. i've got one question for you. you said you lost some torque, how did you get it back? some simple tuning? __________________ 90redGT -Flowmaster mufflers -BBK 2.5" H-Pipe w/cats -BBK equal length shorty headers -K&N -BBK 65mm Throttle Body -Edelbrock performer 5.0 intake -3.73 gears

02-20-2003, 12:14 PM	#4
Ackbar00 Rebel Fleet Commander Join Date: Oct 2001 Location: Huber Heights, OH Posts: 1,003	If you are going to buy a new intake, dont get a GT-40. They are like 600$ new. You can get a TrickFlow TrackHeat of Edelbrock Performer for around 350$ and have money left over for pullys and such. Now dont get me wrong(I had a GT-40) its a good intake, just not 600$ new good. I bought mine used for 250$. Just a thought. __________________ 1993 Mustang GT, PTK w/ T-64 - My Cardomain Webpage 11.25@123.5 on only 8 psi. 10.84@121 on only 1 headgasket "The Truth is, Your the Weak, and I am the Tyranny of Evil Men!"

02-20-2003, 04:15 PM	#5
drudis Moderator Join Date: Dec 1999 Location: Livonia, MI, USA Posts: 1,194	Years ago I did the Cobra intake. Looked at the GT40, but it is too big on a stock motor. I was _very_ pleased with 237rwhp on the dyno. __________________ Darius Rudis, Moderator Corner Carvers Delight 1989 Mustang LX - Open Track Car http://www.dariusrudis.com

02-20-2003, 07:00 PM	#6
chuck88 Registered Member Join Date: May 1999 Location: Wood Ridge NJ USA Posts: 341	Yellow jacket asked: alright, thanks for your opinion on the intake. i've got one question for you. you said you lost some torque, how did you get it back? some simple tuning? __________________ I had it dyno tuned they deserve the credit for getting my torque back chuck 88 __________________ So what if its "midlife crisis". Wife, 2 kids, busy job, "fixer upper" house, and I still have time for the Mustang!!! I Love my kids!!!

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