twin gt42 76mm
09-10-2007, 08:18 PM
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twin gt42 76mm what would a twin gt42 76mm turbo set up be capable of?
I know one is good for the 1100hp mark, but if you were running a 383ci 9:1 motor and looking to put out about the 1200 to 1500hp, and you already have one gt4276, it would be cheaper than buying a single turbo that will produce that kind of hp. I'm already going to redo the hot pipes when I get a new turbo anyway. What do you thing would be the problems?
I know one is good for the 1100hp mark, but if you were running a 383ci 9:1 motor and looking to put out about the 1200 to 1500hp, and you already have one gt4276, it would be cheaper than buying a single turbo that will produce that kind of hp. I'm already going to redo the hot pipes when I get a new turbo anyway. What do you thing would be the problems?
09-11-2007, 01:43 AM
#3
acordding to this guy 1008rwhp on a 402! 
http://www.baldturbofreak.com
you should beable to make ALOT more than that if you could keep the heads on the block! i know nelson racing use T72s and they make over 1500bhp (crank) on a 427 SBC. also i think the larger GT42 are known as GT4202's. these are the 1100bhp units.
Chris.
http://www.baldturbofreak.com
you should beable to make ALOT more than that if you could keep the heads on the block! i know nelson racing use T72s and they make over 1500bhp (crank) on a 427 SBC. also i think the larger GT42 are known as GT4202's. these are the 1100bhp units.
Chris.
09-11-2007, 02:32 AM
#4
you won't get anywhere near 1100 out of a single 4276, been there done that.
Twins, without question.
we've got a car at the shop with a pair of the 70mm GT42's on a 38X LS motor, been 140 MPH in the 1/8 on a 28" radial. Less than stellar passes, not like it really matters
Twins, without question.
we've got a car at the shop with a pair of the 70mm GT42's on a 38X LS motor, been 140 MPH in the 1/8 on a 28" radial. Less than stellar passes, not like it really matters
09-11-2007, 06:37 AM
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Originally Posted by Z8'S
I have a pair of them on my LT1 I'll let you know soon. 
Originally Posted by y2khawk
you won't get anywhere near 1100 out of a single 4276, been there done that.
Originally Posted by Websy21
Ya, you would have to go twins or a big *** single would do it too
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09-11-2007, 10:15 AM
#9
Originally Posted by nick97ta
what would a twin gt42 76mm turbo set up be capable of?
I know one is good for the 1100hp mark, but if you were running a 383ci 9:1 motor and looking to put out about the 1200 to 1500hp, and you already have one gt4276, it would be cheaper than buying a single turbo that will produce that kind of hp. I'm already going to redo the hot pipes when I get a new turbo anyway. What do you thing would be the problems?
I know one is good for the 1100hp mark, but if you were running a 383ci 9:1 motor and looking to put out about the 1200 to 1500hp, and you already have one gt4276, it would be cheaper than buying a single turbo that will produce that kind of hp. I'm already going to redo the hot pipes when I get a new turbo anyway. What do you thing would be the problems?
09-11-2007, 05:32 PM
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Originally Posted by RealQuick
Nick, you giving up already on the single kit?
Originally Posted by DrTurbo
You'll need more then one of those as mentioned to make 1100hp on a 383. Its all about efficiency when it comes to turbocharging. Just cause its rated 1100hp, doesn't mean it will make it.
09-11-2007, 06:57 PM
#12
Originally Posted by chuntington101
acordding to this guy 1008rwhp on a 402!
http://www.baldturbofreak.com
you should beable to make ALOT more than that if you could keep the heads on the block! i know nelson racing use T72s and they make over 1500bhp (crank) on a 427 SBC. also i think the larger GT42 are known as GT4202's. these are the 1100bhp units.
Chris.
http://www.baldturbofreak.com
you should beable to make ALOT more than that if you could keep the heads on the block! i know nelson racing use T72s and they make over 1500bhp (crank) on a 427 SBC. also i think the larger GT42 are known as GT4202's. these are the 1100bhp units.
Chris.
09-12-2007, 06:01 AM
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Originally Posted by John Wilde
Chow's motor made 1850ish on Duttweiler's dyno.
This is with twin GT42/74Rs on ~390ci.
There was more left in the combination.
This is with twin GT42/74Rs on ~390ci.
There was more left in the combination.
One may not be enough for what I want, but two will be more than I need or can handle. the motor that I'm going to build will probably only handle 1200 fwhp, but I would have plenty of turbo left.
