T72bb Vs Gtq70/71
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Mease Performance
Performance Fabrication/Supporting Vendor
- Joined
- Nov 22, 2002
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- 688
sheesh!
why is someone always trying to doubt others results....every setup is different, I know for a fact that the GT turbos are a ton more efficient than the older wheels....who really gives a poop! (LOL)
why is someone always trying to doubt others results....every setup is different, I know for a fact that the GT turbos are a ton more efficient than the older wheels....who really gives a poop! (LOL)
Not meaning to highjack the thread but we know how hard it is to get a hold of Keith
Keith the dp is great. Had to fight a little to get that jersey pipe in there but it was worth it. Definite difference but no updated times being as I'm rebuilding alot of the car again. I'll send you some pictures of the car and install.
-Jay
Keith the dp is great. Had to fight a little to get that jersey pipe in there but it was worth it. Definite difference but no updated times being as I'm rebuilding alot of the car again. I'll send you some pictures of the car and install.
-Jay
Mease Performance
Performance Fabrication/Supporting Vendor
- Joined
- Nov 22, 2002
- Messages
- 688
Originally posted by 1of1035
Not meaning to highjack the thread but we know how hard it is to get a hold of Keith
Keith the dp is great. Had to fight a little to get that jersey pipe in there but it was worth it. Definite difference but no updated times being as I'm rebuilding alot of the car again. I'll send you some pictures of the car and install.
-Jay
Man, this one almost takes out the best of the post whores....nazis, whatever they are
Of course its gonna fight ya....name says it all: Jersey!!!
Originally posted by GNSCOTT
I'll back it up with some dough..I'll bring the 70bb and some dial calipers. we'll break em down measure em up and dyno run em on the same car. I'll bet some special people wouldn't like their turbos measured.
i just cant understand wtf this statment has to do with anything on this thread.
GNVYUS 1
Well-Known Member
- Joined
- Dec 15, 2002
- Messages
- 4,364
Here are some turbo flows along with a conversion for (lbs/min) to cfm.
cfm x .069 = lbs/min ( lbs/min ) / .069 = cfm
T64 = 65 lbs/min ( 942 cfm )
T66 = 72 lbs/min ( 1043 cfm )
T70 = 84 lbs/min ( 1217 cfm )
T72 = 88 lbs/min ( 1275 cfm )
T76 = 93 lbs/min ( 1347 cfm )
I could not find either a cfm # or a ( lbs/min ) # on the new turbos. Find those numbers and the questions start getting answered.
10SV6, to go from a T64 to a 71GTQ is a HUGE jump. The fact you needed 500 rpm more stall ( which a 3700 stall is low for this turbo ) should give you an idea of how large the wheels are over the 64. It will murder a T64 wheel and should only go on cars looking to run mid 9's. Your buddy ran a 10.6 best before, the 71GTQ was not the right turbo for his stock block.
Bamfords 9.57 run was on a 70GTQ.
Cramer ran a PT70 with a P trim to 9.96, that should give you an idea of how far apart these new GTQ turbos are as both drivers can tune their cars.
cfm x .069 = lbs/min ( lbs/min ) / .069 = cfm
T64 = 65 lbs/min ( 942 cfm )
T66 = 72 lbs/min ( 1043 cfm )
T70 = 84 lbs/min ( 1217 cfm )
T72 = 88 lbs/min ( 1275 cfm )
T76 = 93 lbs/min ( 1347 cfm )
I could not find either a cfm # or a ( lbs/min ) # on the new turbos. Find those numbers and the questions start getting answered.
10SV6, to go from a T64 to a 71GTQ is a HUGE jump. The fact you needed 500 rpm more stall ( which a 3700 stall is low for this turbo ) should give you an idea of how large the wheels are over the 64. It will murder a T64 wheel and should only go on cars looking to run mid 9's. Your buddy ran a 10.6 best before, the 71GTQ was not the right turbo for his stock block.
Bamfords 9.57 run was on a 70GTQ.
Cramer ran a PT70 with a P trim to 9.96, that should give you an idea of how far apart these new GTQ turbos are as both drivers can tune their cars.
On D!cks car, Was it making EXACTLY the same amount of boost with both turbos?
Just curious
Otto
Also on a different note, I went to NED (new England dragway)And my first pass was a 11.20 @ 122.1, Just retunes the fast and went 10.47 @ 131.84 on the next pass with nothing but a VE table change Thats almost 10MPH!! with a bit of tuning, Needlass to say the tuning was way off on the pass before.
Just curious
Otto
Also on a different note, I went to NED (new England dragway)And my first pass was a 11.20 @ 122.1, Just retunes the fast and went 10.47 @ 131.84 on the next pass with nothing but a VE table change Thats almost 10MPH!! with a bit of tuning, Needlass to say the tuning was way off on the pass before.
It just goes to show that a turbo on a given motor at a given boost is going to go exactly the same as another turbo unless the turbo being replaced is putting more heat into the intake charge. That's a law of physics. The only thing that might possibly change this is if the new turbo lowered the back pressure in the manifolds, lowering pumping losses.
As for Cramer, how fast would he have gone with a Qtrim exhaust wheel? Isn't Roy and Laz still using a standard T70 type turbo ?
one more comparison.
At the 03 nats Dave had this GTQ turbo on his car before qualifing. he did not quite have his combo dialed in and he was running 9.90 @ 138+. Durring tech the turbo was deemed illegal because of it's availability. dave removed it and put on a regular 70Q trim. this made him loose about 2 tenths and at least 3 mph.
this was on the same day with the same weather conditions.
At the 03 nats Dave had this GTQ turbo on his car before qualifing. he did not quite have his combo dialed in and he was running 9.90 @ 138+. Durring tech the turbo was deemed illegal because of it's availability. dave removed it and put on a regular 70Q trim. this made him loose about 2 tenths and at least 3 mph.
this was on the same day with the same weather conditions.
