GT42 vs GT45 vs 76GTS
11-16-2005, 05:29 PM
#21
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Kyle, the T6 flange will have very little effect on total output. At the point we are getting to with these units, the turbine wheel simply can not flow anymore air. No matter what size housing you put on a turbo or flange the exhaust still has to be reduced to flow through it. A/R and flange size will only change a setup so much...then their is a point of diminishing return either way you go (ala smaller A/R or bigger A/R).
Jose
Jose
11-16-2005, 05:41 PM
#23
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Yeah....the ITS 80 combo would be awesome if the blade was a little larger and compressor cover bigger. Would be hard to beat it then.
Jose
Jose
11-16-2005, 05:41 PM
#24
Originally Posted by JZ 97 SS 1500
hehe, sorry, but it doesn't. The compressor cover is smaller then the 76GTS. The R-trim wheel though flows more then a S-trim wheel even though its smaller, but its also laggier due to the trim being 100. Their is alot more to this then meets the eye.
Jose
Jose
11-16-2005, 05:46 PM
#25
Originally Posted by smokinHawk
mightymouse switched from a its80 to some 76mm turbo by turbo people and picked up some HP
11-16-2005, 05:49 PM
#26
Originally Posted by JZ 97 SS 1500
Yeah....the ITS 80 combo would be awesome if the blade was a little larger and compressor cover bigger. Would be hard to beat it then.
Jose
Jose
11-16-2005, 05:50 PM
#27
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Originally Posted by KissMySSo1
hehe, sorry, but it does. I dunno where you get your info but the compressor cover on the GT80R is bigger then 76GTS. The 80 smokes the 76.
Jose
11-16-2005, 06:23 PM
#28
Originally Posted by JZ 97 SS 1500
Check out some of the guys on turbomustangs.... This has been reviewed a few times. The 80 made less power then the 76GTS on their setups.
Jose
Jose
11-17-2005, 06:24 AM
#31
Originally Posted by KissMySSo1
Actually he didn't pick up any power. He lost power. All he gained was a little bit of spool. He's running a shitload more boost then he did with the 80 and makes the same power.. If he was making the same boost with the 80 he would be alot better off.
think the turbo was a turbonetics modifed by turbopeople (not sure MM knew exactly what was done to the 76 either)
but on the same w2w short block
he made 836/842 at 20psi, runing out of steam as he couldnt get more then 20psi https://ls1tech.com/forums/forced-induction/228083-w2w-6-0-first-dyno-836-842-a.html
on the T76 he made 906/975 pushing it to 23psi
https://ls1tech.com/forums/forced-induction/296452-overboost-906rwhp-975rwtq.html
the 80 just couldnt put out the boost of the 76 it seems.
11-17-2005, 08:49 AM
#32
Well i will be sure to post up how mine does with my GT42-76 and im pretty sure im going to max it...... i do plan on stepping up to the 80mm wheel Jose now had for the GT42..... If it will fit and we will know soon i might even step up to the 82mm wheel.... when then can compare......
Id like to know what Smokin asked you to begin with... what did your 76 max out at?? the 80 now???
Kyle
Id like to know what Smokin asked you to begin with... what did your 76 max out at?? the 80 now???
Kyle
11-17-2005, 01:21 PM
#33
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There is one guy on turbomustangs who went 9.40 on a weak pass with a Master Power GT45 on 20 psi.....
So I think that turbo on the right setup is capable..but everytime I see someone with bad results, it seems to be on a 400"+ cube motor and runs out of steam early.
I paid $550 brand new for my GT45 so i think its a KILLER budget deal.
So I think that turbo on the right setup is capable..but everytime I see someone with bad results, it seems to be on a 400"+ cube motor and runs out of steam early.
I paid $550 brand new for my GT45 so i think its a KILLER budget deal.
11-17-2005, 02:47 PM
#34
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The GT45 is questionable. We had one on a customers 383 SBC, and the turbo would not make more then 15psi and would not make more then 600rwhp through a 4L80E. On a small cube motor I see it making more power indeed, but the compressor is just very small. With a 76mm upgrade though, they become monsters.
Jose
Jose
11-17-2005, 02:54 PM
#35
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Originally Posted by black_z
How much to the rear wheels is a GT42-70 capable of making without running it inefficiently? Wont a larger turbo be running more efficient at the same power level with lower air temps, at the sacrifice of a little more lag? It seems that the 74 or 76 would work just fine with a stock LS1 and leave more room to grow.
Jose
11-17-2005, 04:26 PM
#36
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I can put up with a little bit of lag (traction control 
) I will just have to give you a call when im ready to order Jose. Do you offer package deals if I order multiple parts at the same time?
) I will just have to give you a call when im ready to order Jose. Do you offer package deals if I order multiple parts at the same time?
11-17-2005, 11:13 PM
#37
I didn't max out either. But when both turbos were set at the same boost level the 80 made more power everytime. The more boost i would run the more the power diffrence would increase. I can't max them out yet due to lack of injector and engine management. There are 80mm supra cars out there making over 1000rwhp as well as 76gts coming close. Now as for MM and his setup thinking he maxed out the two turbos. His car doesn't make any power because he's afraid to run the boost it will take. His tuning also sucks thats why it blows up all the time. That is why his car is an embarrassment to turbo cars all over the world.
11-18-2005, 05:36 AM
#38
Originally Posted by KissMySSo1
I didn't max out either. But when both turbos were set at the same boost level the 80 made more power everytime. The more boost i would run the more the power diffrence would increase. I can't max them out yet due to lack of injector and engine management. There are 80mm supra cars out there making over 1000rwhp as well as 76gts coming close. Now as for MM and his setup thinking he maxed out the two turbos. His car doesn't make any power because he's afraid to run the boost it will take. His tuning also sucks thats why it blows up all the time. That is why his car is an embarrassment to turbo cars all over the world.
are you being sarcastic with Dave's car.the first sign of maxing out a turbo is cranking it up all the way and not getting anymore boost.
by you making more power with the 80 over the 76 only tells that your in a better effiecency range for that amount of airflow, not the fact that the turbo will make more power (peak or a different section on the map)
over 900rwhp an embarrisment, give me a break.
11-18-2005, 07:34 AM
#39
Originally Posted by smokinHawk
are you being sarcastic with Dave's car.the first sign of maxing out a turbo is cranking it up all the way and not getting anymore boost.
by you making more power with the 80 over the 76 only tells that your in a better effiecency range for that amount of airflow, not the fact that the turbo will make more power (peak or a different section on the map)
over 900rwhp an embarrisment, give me a break.
with ya there buddy.......
Lack of engine managment............... with so many people making over 800rwhp on a stock PCM with a 3 bar MAP tune.......
Thats how mine wll be...
Davids problem as will anyone else who trys pump 93 and high boost is the same problem....... many have said not to do it..l even with Meth.... all the what if's.... and one of the what if's happened.... that is all.....
Can you run a 9 sec pass in your 6 speed car?????
Kyle
11-18-2005, 09:37 AM
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I have had the MP GT45 and now have a Precision T76.
1) The GT45 is about 12lbs heavier that the T76.
2) The GT45 is 1/4 bigger in size than the T76.
3) The GT45 is rated at 1000hp from them...how..it has a 69mm wheel..Might as well call it a T70.
4) The T76 will make 1000fwhp.........
5) Boost rpm is the same on both turbos, around 3400rpm's with 383ci's.
To me if you are looking at making more than 700fwhp the GT45 should be left out of the picture..... Unless there is some testing done on the new wheels that Jose is making to show the HP potential. I think boost rpm will be higher with the GT45-76.... But I am an idiot so who knows.
At 14 psi the the two are the same... if that matters to you.
Hell, I could almost put twin 76's where I had the GT45. But my block would not like it.
Talking smack about MM is not cool.
1) The GT45 is about 12lbs heavier that the T76.
2) The GT45 is 1/4 bigger in size than the T76.
3) The GT45 is rated at 1000hp from them...how..it has a 69mm wheel..Might as well call it a T70.
4) The T76 will make 1000fwhp.........
5) Boost rpm is the same on both turbos, around 3400rpm's with 383ci's.
To me if you are looking at making more than 700fwhp the GT45 should be left out of the picture..... Unless there is some testing done on the new wheels that Jose is making to show the HP potential. I think boost rpm will be higher with the GT45-76.... But I am an idiot so who knows.
At 14 psi the the two are the same... if that matters to you.
Hell, I could almost put twin 76's where I had the GT45. But my block would not like it.
Talking smack about MM is not cool.
Last edited by Lethal Injection; 11-18-2005 at 09:43 AM.