Go Back   LS1TECH > LS1-LS2-LS3-LS6-LS7 PERFORMANCE > Forced Induction
Sign in using an external account
Register Forgot Password?
Search

Forced Induction
Superchargers | Turbochargers | Intercoolers
Sponsored by
RPM Motorsports

Welcome to LS1Tech.com!
Welcome to LS1Tech.com.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, join LS1Tech.com today!


Reply
 
Thread Tools Search this Thread
Old 10-28-2013, 06:53 PM   #1
Staging Lane
Garage is empty, add now
 
Trader Rating: 4
Join Date: Nov 2005
Location: San Francisco, CA
Posts: 87
Default How far will a 7675 go on a 6.0?

I have a late model stock LQ4 that I'd like to run to the edge and am thinking the CEA 7675 I have might not get me into the 800+ range through a 4l80. Just curious how much further I would get with this turbo setup on a 5.3 instead. I really don't want to change to another turbo since it's packaged tight and I don't want to cut everything apart. If I went with the 5.3, it would be an L33 so I would get the added bonus of 80lbs off the nose.

Also, any input on what the out of boost torque difference will be between a 6.0 and a 5.3? I know LS1NOVA made the switch, perhaps he would be willing to chime in? I am using a stock converter, so it will likely be more noticeable than most setups. This is a 90% street, 5% drag race and 5% auto-X deal. Running E85.
__________________
1967 Camaro - JY LQ4/4L80e, PT7675, TU1 cam.
tiznodd is offline   Reply With Quote
Old 10-28-2013, 07:16 PM   #2
9 Second Truck Club
Garage is empty, add now
 
stock48's Avatar
 
Trader Rating: 16
Join Date: Sep 2006
Location: Colorado Springs, Co/ Central, Ca
Posts: 3,566
Default

It should get you there long as you don't go overboard on the cam. Too much cam will kill it. They will make enough to go 160 mph at ~ 3000 lbs.
__________________

-03 GMC 4x4, lQ4, JFR Triple 12 cam, KBRacing 76mm, 80E/Yank Py3400. 9.73/139mph, 4850 lbs.

-1972 Nova Street car, Factory short block 6.0L, 317 Heads, JFR 218 cam, S476/T4 street cruiser. 8.39/164 mph, Glide, Yank EL3400, 3300 lbs, foot brake.
stock48 is offline   Reply With Quote
Old 10-28-2013, 07:30 PM   #3
Staging Lane
Garage is empty, add now
 
Trader Rating: 4
Join Date: Nov 2005
Location: San Francisco, CA
Posts: 87
Default

Meaning my current LQ4 will get me there? Is the TU1 (225/225) too much cam? What spooked me was seeing your S475 poop out at 16psi. It's somewhat similar to the 7675 from what I can tell. That's what had me thinking the 5.3 would be a better match.

Quote:
Originally Posted by stock48 View Post
It should get you there long as you don't go overboard on the cam. Too much cam will kill it. They will make enough to go 160 mph at ~ 3000 lbs.
__________________
1967 Camaro - JY LQ4/4L80e, PT7675, TU1 cam.
tiznodd is offline   Reply With Quote
Old 10-28-2013, 07:38 PM   #4
9 Second Truck Club
Garage is empty, add now
 
stock48's Avatar
 
Trader Rating: 16
Join Date: Sep 2006
Location: Colorado Springs, Co/ Central, Ca
Posts: 3,566
Default

Quote:
Originally Posted by tiznodd View Post
Meaning my current LQ4 will get me there? Is the TU1 (225/225) too much cam? What spooked me was seeing your S475 poop out at 16psi. It's somewhat similar to the 7675 from what I can tell. That's what had me thinking the 5.3 would be a better match.
I ment the lq4 and 76/75. The cam might get some reversion but I would
Try it first.

My S475 would make over 20 psi but car didn't pick up any in the 1/8 past 17 psi. I did find the turbine all chewed up from pieces from my flex joint that blew apart prior to track outting. I have since repaired turbo and it is on truck pulling hard to 18 psi.
__________________

-03 GMC 4x4, lQ4, JFR Triple 12 cam, KBRacing 76mm, 80E/Yank Py3400. 9.73/139mph, 4850 lbs.

-1972 Nova Street car, Factory short block 6.0L, 317 Heads, JFR 218 cam, S476/T4 street cruiser. 8.39/164 mph, Glide, Yank EL3400, 3300 lbs, foot brake.
stock48 is offline   Reply With Quote
Old 10-28-2013, 07:43 PM   #5
Man-Crush Warning
Garage is empty, add now
 
Shownomercy's Avatar
 
Trader Rating: 1
Join Date: Jun 2009
Posts: 1,281
Default

Mine just did 733ft/lb on 10psi.
Shownomercy is offline   Reply With Quote
Old 10-28-2013, 07:55 PM   #6
Staging Lane
Garage is empty, add now
 
Anti_Venom99's Avatar
 
Trader Rating: 1
Join Date: Jul 2011
Posts: 65
Default

I would also like to know! My setup will be done soon and I am a stock bottom LS2 with 317 heads, a 228/228 .588/.588 114 turbo cam, and the PT7675 CEA, on e85. I also have a 6 speed. I am hoping for 800whp... no idea what my torque will be lol

But it should be done in December so we will see!
__________________

99 C5 LS2 Single turbo-in progress
DD-04 SRT4, built, baby turbo, pump gas-4xxwhp/tq
Anti_Venom99 is offline   Reply With Quote
Old 10-28-2013, 08:19 PM   #7
TECH Enthusiast
Garage is empty, add now
 
jrpimp00's Avatar
 
Trader Rating: 14
Join Date: Jan 2004
Location: Fayetteville, NC
Posts: 613
Send a message via AIM to jrpimp00 Send a message via Yahoo to jrpimp00
Default

Mine made just under 700 on 12 psi with a 224R 114lsa
__________________

1998 Trans Am
ATK 408, s480, Huron Speed front mount, Tick Specd Cam, Moser 9", Tuned by RPM, 819 RWHP @ 12.5 PSI.
jrpimp00 is offline   Reply With Quote
Old 10-28-2013, 08:38 PM   #8
Staging Lane
Garage is empty, add now
 
Trader Rating: 4
Join Date: Nov 2005
Location: San Francisco, CA
Posts: 87
Default

Quote:
Originally Posted by jrpimp00 View Post
Mine made just under 700 on 12 psi with a 224R 114lsa
It looks like you've got a bigger exhaust housing on your Turbonetics. I'm concerned the .96 I have will hit a wall sooner than I'm hoping for. They do great in the mid-boost range.

I want to make sure my #3500 setup can run mid-140 mph at the track.

Thanks everyone for the input so far.
__________________
1967 Camaro - JY LQ4/4L80e, PT7675, TU1 cam.
tiznodd is offline   Reply With Quote
Old 10-28-2013, 08:41 PM   #9
Staging Lane
Garage is empty, add now
 
Trader Rating: 4
Join Date: Nov 2005
Location: San Francisco, CA
Posts: 87
Default

Quote:
Originally Posted by stock48 View Post
I ment the lq4 and 76/75. The cam might get some reversion but I would
Try it first.

My S475 would make over 20 psi but car didn't pick up any in the 1/8 past 17 psi. I did find the turbine all chewed up from pieces from my flex joint that blew apart prior to track outting. I have since repaired turbo and it is on truck pulling hard to 18 psi.
How much less do you think the S475 is making than the GT76 you were running? If I recall, you were making 900 on a Dynojet with the Garrett.
__________________
1967 Camaro - JY LQ4/4L80e, PT7675, TU1 cam.
tiznodd is offline   Reply With Quote
Old 10-28-2013, 09:28 PM   #10
9 Second Truck Club
Garage is empty, add now
 
stock48's Avatar
 
Trader Rating: 16
Join Date: Sep 2006
Location: Colorado Springs, Co/ Central, Ca
Posts: 3,566
Default

Quote:
Originally Posted by tiznodd View Post
How much less do you think the S475 is making than the GT76 you were running? If I recall, you were making 900 on a Dynojet with the Garrett.
Im not sure but the GT76 definitely made more power. I think truck will go bottom 10's maybe scrape a 9.9 in mid 130's with the S475. Gt76 was 900 unlocked sae numbers. Was like 936 locked iirc.
__________________

-03 GMC 4x4, lQ4, JFR Triple 12 cam, KBRacing 76mm, 80E/Yank Py3400. 9.73/139mph, 4850 lbs.

-1972 Nova Street car, Factory short block 6.0L, 317 Heads, JFR 218 cam, S476/T4 street cruiser. 8.39/164 mph, Glide, Yank EL3400, 3300 lbs, foot brake.
stock48 is offline   Reply With Quote
Old 10-28-2013, 09:43 PM   #11
Teching In
2001 Pontiac Trans Am
 
Trader Rating: 0
Join Date: Aug 2010
Location: Bismarck, North Dakota
Posts: 15
Default pt7875 gts

I got a ws6 lq9 402 hci rear mount pt7875 .96 ar. On 14 psi made 700whp 723wtq max power at 5300rpm max torque 4700rpm only revving to 6100rpm cuz backpreasure becomes an issue from what I see after 14psi with a 7675 or 7875 on a 402,408. I was down to 630ish whp at 6500 rpm and at 6100rpm where I shift I'm still around 670whp so your rpm work range is lower rpm which for a dd 700whp ws6 is amazing. Tons of torque very quick but still I plan to switch to bw s475 with 96mn turbine 88mm exit on turbine with 1.32 t6 with a quick spool valve. Full boost comes around 3500rpm with my setup now with pt7875 gts. n should be 3000rpm or less with the bw and qsv
__________________
2000 Firebird Formula ls1
SLP Lt's SLP cat-less y, SLP lm1, K&N FIPK, TUNE
Krenz is offline   Reply With Quote
Old 10-28-2013, 10:32 PM   #12
Staging Lane
Garage is empty, add now
 
Anti_Venom99's Avatar
 
Trader Rating: 1
Join Date: Jul 2011
Posts: 65
Default

Quote:
Originally Posted by Krenz View Post
I got a ws6 lq9 402 hci rear mount pt7875 .96 ar. On 14 psi made 700whp 723wtq max power at 5300rpm max torque 4700rpm only revving to 6100rpm cuz backpreasure becomes an issue from what I see after 14psi with a 7675 or 7875 on a 402,408. I was down to 630ish whp at 6500 rpm and at 6100rpm where I shift I'm still around 670whp so your rpm work range is lower rpm which for a dd 700whp ws6 is amazing. Tons of torque very quick but still I plan to switch to bw s475 with 96mn turbine 88mm exit on turbine with 1.32 t6 with a quick spool valve. Full boost comes around 3500rpm with my setup now with pt7875 gts. n should be 3000rpm or less with the bw and qsv
You have way to big of a motor to be running a 76 man... An s480 is where you need to go
__________________

99 C5 LS2 Single turbo-in progress
DD-04 SRT4, built, baby turbo, pump gas-4xxwhp/tq
Anti_Venom99 is offline   Reply With Quote
Old 10-29-2013, 07:46 AM   #13
9 Second Club
Garage is empty, add now
 
RedRocketZ28's Avatar
 
Trader Rating: 14
Join Date: Jan 2005
Location: Des Moines, IA
Posts: 1,545
Default

The turbo would definitely be more efficient on the 5.3 but will work nicely on the 6.0. I have a similar setup, LQ4, TU1, 7875, 4L80e, E85. I ran 9.9 @ 140 with a 3400-3500 race weight on 14 psi. Trapped 142 on 16 psi and when tried to go to 18-19 psi the charge pipe blew off. I imagine it would have gone 144-145 on that pass. Dyno shows power dropping off around 5700 rpm, but screams all the way there. I think a cam change would help it pull harder up top.

The turbo doesn't really like being pushed that hard on the LQ4 though. I don't think 800 rwhp will be possible with it through a 4L80e. On 16 psi I made 677 rwhp. The Precision units do seem to make more power than the new Turbonetics units however.

I am making the switch to a S480 and have a feeling I will be kicking myself later. My current setup is a blast to drive on the street. I guess we will see what happens in the spring.
__________________

2001 Z28 1SC - LQ4 l Tick Cam l S480 l 4L80E l Circle D l 9 Inch l E85
9.921 @ 140.43 - Old setup - SOLD
1995 Mustang GT - Turbo LS build coming soon...
RedRocketZ28 is offline   Reply With Quote
Old 10-29-2013, 08:14 AM   #14
Teching In
2001 Pontiac Trans Am
 
Trader Rating: 0
Join Date: Aug 2010
Location: Bismarck, North Dakota
Posts: 15
Default turbo

I know right!!!! I want an s480 with 96mm turbine and quick spool valve so bad!!!! Lol gonna be a winter project this year. Current setup is a blast on the street and I purchased the car built like this. Works good but can be improved for sure
__________________
2000 Firebird Formula ls1
SLP Lt's SLP cat-less y, SLP lm1, K&N FIPK, TUNE
Krenz is offline   Reply With Quote
Old 10-29-2013, 08:52 AM   #15
TECH Resident
2009 BMW 3-Series
 
willizm's Avatar
 
Trader Rating: 9
Join Date: Apr 2009
Location: Joliet,IL and Las Vegas 50/50
Posts: 954
Default

I'm pushing about 15psi and made 735whp and 920wtq on a mustang dyno unlocked converter. I ran out of injector or we would have pushed it harder. Forged ls1, tu1 cam, 317 heads, 9.5:1 cr, e85, proYank converter, 4l80e, pt7675. I only ran it on spring pressure(10psi) and went 10.4@135mph. Car was breaking up on higher boost passes so had to switch out plugs. All is right as rain so hoping to get some 9's next time out.

FWIW i'm happy with this turbo and will push it to the max once I up my fueling this winter.
__________________
2013 f150 EcoBoost FX4 | Mods = *cough*
2010 Escalade Premium | Mods = Urban Assault Vehicle Enhancements
2001 Trans Am WS6 | Mods = PT7675 CEA, Forged LS1, Jakes 4l80e stage5 trans, FIC2000's, s60 rearend, etc on e85 "pump" gas.
Old numbers:735whp and 920wtq - 15psi and 15*
New numbers: ???whp and ???wtq - 22psi and 18*
Tuned by Straightline Performance.
willizm is offline   Reply With Quote
Old 10-29-2013, 01:04 PM   #16
9 Second Club
Garage is empty, add now
 
NicD's Avatar
 
Trader Rating: 7
Join Date: Nov 2001
Location: Chandler, AZ
Posts: 1,831
Default

Closest comparison I can make is my 5.7L with a 76GTS which is similar although the 7675 with a billet wheel will have a bit of an advantage but the turbine is still the choke point. My combo is done at 800 rwhp through a TH400 and more cubes will knock that down just a bit. I would run the 6.0L vs the 5.3L hands down given your 90% street with a stock converter application.
__________________

2000 Turbo Camaro | 2004 TT GTO | 09.5 TVS G8 GXP | 09 G8 GT | 1994 GT - The LS-stang
NicD is offline   Reply With Quote
Old 10-29-2013, 01:40 PM   #17
On The Tree
1999 Pontiac Trans Am
 
Mrmooney's Avatar
 
Trader Rating: 9
Join Date: Sep 2012
Location: Rio Rancho, NM
Posts: 177
Default

I'm making 700wrhp through a 5.3 th400 7675 and its having backpressure issues, I'm going to try swapping out cam as I believe for my combo it's not right, but 7675 on a 6.0 I think would be too small and you would have even more backpressure issues.
I am also at a much higher elevation of 5600+ feet above sea level so that could be it also.
__________________
If it ain't broke fix it till it is!!!!!
Mrmooney is offline   Reply With Quote
Old 10-29-2013, 01:46 PM   #18
Moderator
Garage is empty, add now
 
Trader Rating: 2
Join Date: Aug 2008
Posts: 3,984
Default

you see the guy with the notch mustang and a built 5.3 (347 cubes) going approx 8.5 @ 160+ with a 7675?

about that far hahah
denmah is offline   Reply With Quote
Old 10-29-2013, 03:39 PM   #19
Staging Lane
Garage is empty, add now
 
Trader Rating: 4
Join Date: Nov 2005
Location: San Francisco, CA
Posts: 87
Default

Quote:
Originally Posted by denmah View Post
you see the guy with the notch mustang and a built 5.3 (347 cubes) going approx 8.5 @ 160+ with a 7675?

about that far hahah
Lol. It seems everyone with a fox is running 8's these days. I've got a 3500lb pig to push down the track. No doubt that car is making some serious power though.

The responses seem mixed. If I come across a good deal on an L33 I'll go that route, otherwise I'll just use the LQ4 I've got.
__________________
1967 Camaro - JY LQ4/4L80e, PT7675, TU1 cam.
tiznodd is offline   Reply With Quote
Old 10-29-2013, 03:43 PM   #20
Staging Lane
Garage is empty, add now
 
Trader Rating: 4
Join Date: Nov 2005
Location: San Francisco, CA
Posts: 87
Default

Quote:
Originally Posted by NicD View Post
I would run the 6.0L vs the 5.3L hands down given your 90% street with a stock converter application.
Yeah, the stock converter thing is something the 6.0 has going for it. The 5.3 might suck out of boost. As of now I can at least break the tires loose from a stop without spooling it on the brakes.
__________________
1967 Camaro - JY LQ4/4L80e, PT7675, TU1 cam.
tiznodd is offline   Reply With Quote
Old 10-29-2013, 03:43 PM
LS1Tech
Pontiac Firebird




Paid Advertisement
Reply

Tags
53, 53l, 60, 75mm, 7675, 7875, backpressure, cam, dyno, lq4, ls1tech, ls3, max, power, turbo


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
5.3 pt7675 running a tu2 cam???? 831jd Forced Induction 1 04-25-2014 02:15 AM
S480 t4 vs pt7675 831jd Forced Induction 11 01-04-2014 08:45 AM
Size comparison: TC76 vs. PTE 7675 DavidPHumes Forced Induction 21 10-15-2012 01:05 PM
Help! Turbo sizing for 5.3 - Specs inside 98CamZ28 Forced Induction 7 05-09-2012 01:47 PM
S480 vs 7675 pte Transam Rocket Forced Induction 11 02-17-2012 08:51 PM



All times are GMT -5. The time now is 08:42 PM.


Powered by vBulletin® Version 3.8.7 AC1
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Advertising - Terms of Service - Privacy Statement - JOBS
Emails & Contact Details