gt40r on built b20vtec needs more power
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i have a built b20vtec with a garrett gt40r turbo and i made 420hp and 300tq on 21 lbs on a mustang dyno today. i wanna know why the turbo stops making power after 7000. the turbo has a .95 t4 ar. and i am running skunk2 pro2 cams. with like 9.1 compression. i am aiming for 500hp. is this a common thing with this turbo. boost doesnt fall but power does. please please PLEASE HELP ASAP. THANKS |
Re: gt40r on built b20vtec needs more power
Originally Posted by lamonte619
(Post 5472642)
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i have a built b20vtec with a garrett gt40r turbo and i made 420hp and 300tq on 21 lbs on a mustang dyno today. i wanna know why the turbo stops making power after 7000. the turbo has a .95 t4 ar. and i am running skunk2 pro2 cams. with like 9.1 compression. i am aiming for 500hp. is this a common thing with this turbo. boost doesnt fall but power does. please please PLEASE HELP ASAP. THANKS |
Re: gt40r on built b20vtec needs more power
Originally Posted by lamonte619
(Post 5472642)
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i have a built b20vtec with a garrett gt40r turbo and i made 420hp and 300tq on 21 lbs on a mustang dyno today. i wanna know why the turbo stops making power after 7000. the turbo has a .95 t4 ar. and i am running skunk2 pro2 cams. with like 9.1 compression. i am aiming for 500hp. is this a common thing with this turbo. boost doesnt fall but power does. please please PLEASE HELP ASAP. THANKS |
Re: gt40r on built b20vtec needs more power
Originally Posted by WALL-E
(Post 5472711)
You should be making 4xxwhp on 12-14lbs with that set-up. Id get that thing to Matt Shue asap, he will surely get 600+ out of the thing if the fueling is there.
OP Whyd you decide to go with pro 2s instead of pro 1s? I made 524whp on 18psi and 630wp on 25psi on a 35r with ctrs so something is def wrong with your setup |
Re: gt40r on built b20vtec needs more power
I made 411 on a T4T67 at 15 lbs. I would think that with you setup you should make over 500, depending on the fuel system.
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Re: gt40r on built b20vtec needs more power
yea thanks guys for telling me u make good power but u have WAY different turbos and im really trying to find out if my turbo or cams are too big. maybe a smaller hotside or some thing. i went with pro 2 cause i got them at a nice deal brand new. but would trade for pro1 cams
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Re: gt40r on built b20vtec needs more power
Originally Posted by wright
(Post 5472823)
I made 411 on a T4T67 at 15 lbs. I would think that with you setup you should make over 500, depending on the fuel system.
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Re: gt40r on built b20vtec needs more power
Originally Posted by lamonte619
(Post 5473369)
yea thanks guys for telling me u make good power but u have WAY different turbos and im really trying to find out if my turbo or cams are too big. maybe a smaller hotside or some thing. i went with pro 2 cause i got them at a nice deal brand new. but would trade for pro1 cams
I think that we are all trying to say that you have something going on that needs to be looked at. I made 845 with a S372 at 24-28 lbs and OE Honda cams. Like said let another tuner look at it. |
Re: gt40r on built b20vtec needs more power
Yeah, there has to be a bottleneck somewhere with that amount of power from a GT40R.
What's the full engine and exhaust setup? |
Re: gt40r on built b20vtec needs more power
contact shad. @ accuracy automotive
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