Precision Pt6765sp Billet turbo questions
04-14-2010, 02:41 PM
#1
On The Tree
Thread Starter
iTrader: (3)
Join Date: Mar 2010
Location: Calgary, Alberta
Posts: 121
Likes: 0
Received 0 Likes
on
0 Posts
Precision Pt6765sp Billet turbo questions Never really heard much about these turbos. I have been calling around today and been pointed in there direction by a couple sales people. My goals are:
5.3 block punched out to a 5.7 running a 6200-6500 redline making about 650-700whp (with a little room to grow). From reading compressor maps it seems a gt4294 or gt4502 would be a good sized turbo, but when talking with a couple people on the phone have been pointed in the direction of either a GT4094rs or a Precision 6765. And been told anything GTK is trash and old technology.... I am also wanting spool around 3500-3800 RPM.
Looks like lots of guys here are running t70, mp70 or t76 turbos, what is a good value for power turbo?
-Garrett
5.3 block punched out to a 5.7 running a 6200-6500 redline making about 650-700whp (with a little room to grow). From reading compressor maps it seems a gt4294 or gt4502 would be a good sized turbo, but when talking with a couple people on the phone have been pointed in the direction of either a GT4094rs or a Precision 6765. And been told anything GTK is trash and old technology.... I am also wanting spool around 3500-3800 RPM.
Looks like lots of guys here are running t70, mp70 or t76 turbos, what is a good value for power turbo?
-Garrett
04-14-2010, 06:32 PM
#3
Imo many "sales people" don't really know there product and will steer you in the wrong direction.
5.7l and 67mm will make it tough to hit your goals. A 6765 has a smallish turbine wheel for 5.7l (65mm) even supra guys are switching to 1.15 a/r turbine housings with that turbo. a gt4294 is still a 67mm turbo, the hot side is better sized for your situation, but still far from ideal. A gt4094r is about the worse choice of the group, they look ok on paper but they spool slow and just don't make the power they should and cost a lot. gt4502 is more hotside than you need for 700hp Imo. A gt4202 would be ok, but there are physically large and don't seem to out perform T or TC turbos. GTK's are trash huh? Overpriced yes, All the turbonetics T7x or TC7x turbos you see making good power here are basically a journal bearing GTK with out the turbine coating, and fancy anti surge housing. Based on the trash talking GTK's and the turbos that people have recommended for you must be talking to import (or 4cyl stuff) shops.
The most common way the get where you want to go in the ls world is going to be a TC76 with a .96 ar hot side. (or a GTK1000 lol) it will spool plenty fast and make great power. plus the price is reasonable. if you have to have a billet wheel because cast is old technology and trash,
get a pt7675 billet (I asked my self the same thing when I bought my last set of turbos, in the end the there were cast wheel turbos that would do exactly what I want for cheaper with a better warranty)
5.7l and 67mm will make it tough to hit your goals. A 6765 has a smallish turbine wheel for 5.7l (65mm) even supra guys are switching to 1.15 a/r turbine housings with that turbo. a gt4294 is still a 67mm turbo, the hot side is better sized for your situation, but still far from ideal. A gt4094r is about the worse choice of the group, they look ok on paper but they spool slow and just don't make the power they should and cost a lot. gt4502 is more hotside than you need for 700hp Imo. A gt4202 would be ok, but there are physically large and don't seem to out perform T or TC turbos. GTK's are trash huh? Overpriced yes, All the turbonetics T7x or TC7x turbos you see making good power here are basically a journal bearing GTK with out the turbine coating, and fancy anti surge housing. Based on the trash talking GTK's and the turbos that people have recommended for you must be talking to import (or 4cyl stuff) shops.
The most common way the get where you want to go in the ls world is going to be a TC76 with a .96 ar hot side. (or a GTK1000 lol) it will spool plenty fast and make great power. plus the price is reasonable. if you have to have a billet wheel because cast is old technology and trash,
get a pt7675 billet (I asked my self the same thing when I bought my last set of turbos, in the end the there were cast wheel turbos that would do exactly what I want for cheaper with a better warranty) Last edited by Professor_speed; 04-14-2010 at 06:45 PM.
04-14-2010, 10:26 PM
#4
On The Tree
Thread Starter
iTrader: (3)
Join Date: Mar 2010
Location: Calgary, Alberta
Posts: 121
Likes: 0
Received 0 Likes
on
0 Posts
I looking to get a fairly well priced turbo that will perform well. I am not looking to spend 2 grand on a turbo for a car that will drive 3k miles this year and maybe get the setup changed for next year. I'll take a look at the TC76 and that PT7675. Looks like the modular turbo website has some pretty good pricing. What are someother turbos that guys on this site are running? (singles)
-Garrett
-Garrett
04-14-2010, 10:27 PM
#5
i'm running a TC78, theres a guy on here (skinnies) running a tc78 on his 5.3 and he loves it. He went 9s in an rx7 w/ it. Spools insanely quick, etc. heres his car
http://www.youtube.com/watch?v=27Miy_Vf_9Q
http://www.youtube.com/watch?v=27Miy_Vf_9Q
04-14-2010, 10:43 PM
#6
On The Tree
Thread Starter
iTrader: (3)
Join Date: Mar 2010
Location: Calgary, Alberta
Posts: 121
Likes: 0
Received 0 Likes
on
0 Posts
Well it looks like that spooled just right 
I assume he is running automatic... what is his user name?
-Garrett
EDIT: wait, sounds like he might have downshifted....
I assume he is running automatic... what is his user name?-Garrett
EDIT: wait, sounds like he might have downshifted....
04-15-2010, 09:41 AM
#7
Launching!
Join Date: Oct 2005
Location: Northern Chicago
Posts: 240
Likes: 0
Received 0 Likes
on
0 Posts
On that size motor go with a 4202.
The billet 67's kick *** but are a tad small. The 6765 turbine is pretty small for those cubes, 6768 would be better suited.
The billet 67's kick *** but are a tad small. The 6765 turbine is pretty small for those cubes, 6768 would be better suited.
Trending Topics
04-15-2010, 12:18 PM
#9
On The Tree
Thread Starter
iTrader: (3)
Join Date: Mar 2010
Location: Calgary, Alberta
Posts: 121
Likes: 0
Received 0 Likes
on
0 Posts
just talked to forcedperformance and they recommended a t78 tubing, and it's bb for only $1400. Pretty sure I will order that when I get home to m visa. Any thoughts?
04-15-2010, 12:20 PM
#10
you can also get a .96 t4 backhousing on the 67billet. I stand in favor to the PTE Billtet turbos. Just cause its small does not mean anything. If it makes the power in a 4 or 8cly its still the same. I would take a Precision turbo anyday over a Turbonetics turbo...
04-15-2010, 10:31 PM
#14
you can also get a .96 t4 backhousing on the 67billet. I stand in favor to the PTE Billtet turbos. Just cause its small does not mean anything. If it makes the power in a 4 or 8cly its still the same. I would take a Precision turbo anyday over a Turbonetics turbo...
04-17-2010, 11:39 PM
#17
2-300 RPM difference...not work 300 bucks to me. Add 2 degrees timing in the out of boost RPMs and make up for it anyways.
