Forced Induction Superchargers | Turbochargers | Intercoolers

Twin 6765s too big for my setup?

Thread Tools
 
Search this Thread
 
Old Jun 21, 2016 | 09:08 PM
  #1  
Gripenfelter's Avatar
Thread Starter
TECH Enthusiast
20 Year Member
Liked
Loved
Community Favorite
iTrader: (1)
 
Joined: Oct 2002
Posts: 523
Likes: 58
From: Winnipeg, Manitoba, Canada
Default Twin 6765s too big for my setup?

My engine builder suggested 6765s for my stock displacement LQ9 but my friends are saying there will be too much lag. Turbos from VS racing.

Should I go smaller?

LQ9 with LSA heads. 900 rwhp.
Reply
Old Jun 21, 2016 | 11:26 PM
  #2  
Gripenfelter's Avatar
Thread Starter
TECH Enthusiast
20 Year Member
Liked
Loved
Community Favorite
iTrader: (1)
 
Joined: Oct 2002
Posts: 523
Likes: 58
From: Winnipeg, Manitoba, Canada
Default

Also looking at the Borg S366?
Reply
Old Jun 22, 2016 | 07:06 AM
  #3  
dburt86's Avatar
TECH Regular
iTrader: (2)
 
Joined: Jun 2015
Posts: 498
Likes: 1
From: CT
Default

i run 66/64 ebay turbos on my stock lq4 and it does well. Full boost by 3700ish on a roll in. 3200 if im on antilag

Im t56
Reply
Old Jun 22, 2016 | 02:10 PM
  #4  
Turbo LS1 SS's Avatar
10 Second Club
iTrader: (7)
 
Joined: Mar 2005
Posts: 1,159
Likes: 0
From: Buffalo
Default

Sounds like you need some new friends! You're good.
Reply
Old Jun 22, 2016 | 02:15 PM
  #5  
Gripenfelter's Avatar
Thread Starter
TECH Enthusiast
20 Year Member
Liked
Loved
Community Favorite
iTrader: (1)
 
Joined: Oct 2002
Posts: 523
Likes: 58
From: Winnipeg, Manitoba, Canada
Default

Thanks. You're right, I don't need that kind of negativity in my life lol.
Reply
Old Jun 22, 2016 | 03:30 PM
  #6  
Hi-Po's Avatar
TECH Enthusiast
iTrader: (4)
 
Joined: Nov 2005
Posts: 712
Likes: 0
From: Florida
Default

If you're an auto, definitely nothing to worry about.
Reply
Old Jun 23, 2016 | 10:18 AM
  #7  
toytech93's Avatar
Launching!
iTrader: (2)
 
Joined: Aug 2010
Posts: 260
Likes: 0
From: wilson,nc
Default

I thought vs racing didn't sell a 6765s. They list a 7665 though.
Reply
Old Jun 23, 2016 | 10:24 AM
  #8  
Gripenfelter's Avatar
Thread Starter
TECH Enthusiast
20 Year Member
Liked
Loved
Community Favorite
iTrader: (1)
 
Joined: Oct 2002
Posts: 523
Likes: 58
From: Winnipeg, Manitoba, Canada
Default

Originally Posted by toytech93
I thought vs racing didn't sell a 6765s. They list a 7665 though.
Message Viren Singh on Facebook.

Him and Bret Bauer actually recommended the Borg S366 to me now anyways so I'll use those for my twin setup.

I'll do a proper build thread once I get some parts delivered next month.
Reply
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

 Verdad Gallardo
story-1

6 Common C5 Corvette Failures and What's Involved In Repairing Them

 Pouria Savadkouei
story-2

Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

 Verdad Gallardo
story-3

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-4

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-5

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
story-6

Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

 Verdad Gallardo
story-7

Awesome K5 Blazer Restomod Comes With C7 Corvette Power

 Verdad Gallardo
story-8

10 Camaros You Should Never Buy

 
story-9

10 LS Engine Myths That Refuse to Die

 Verdad Gallardo
Old Jun 23, 2016 | 02:17 PM
  #9  
cajundragger's Avatar
TECH Apprentice
iTrader: (2)
 
Joined: Jan 2007
Posts: 345
Likes: 0
Default

I been shooting for 1000chp on a 388ci and AGP pointed me in the direction of their s256s.

crazy difference in turbo size vs similar power goals.
Reply
Old Jun 23, 2016 | 03:24 PM
  #10  
Gripenfelter's Avatar
Thread Starter
TECH Enthusiast
20 Year Member
Liked
Loved
Community Favorite
iTrader: (1)
 
Joined: Oct 2002
Posts: 523
Likes: 58
From: Winnipeg, Manitoba, Canada
Default

Originally Posted by cajundragger
I been shooting for 1000chp on a 388ci and AGP pointed me in the direction of their s256s.

crazy difference in turbo size vs similar power goals.
Are you doing twins? What is the lag like?
Reply
Old Jun 23, 2016 | 05:23 PM
  #11  
roastin240's Avatar
TECH Resident
10 Year Member
iTrader: (13)
 
Joined: Apr 2011
Posts: 911
Likes: 4
From: Melbourne, FL
Default

How are people liking the BW knock off turbos? Are they performing as well as a genuine BW performance wise?
Reply
Old Jun 24, 2016 | 02:06 AM
  #12  
stevieturbo's Avatar
9 Second Club
 
Joined: Nov 2003
Posts: 13,616
Likes: 185
From: Norn Iron
Default

S366's would be very big and laggy for only 900hp, unless you're a 427 or near.
Reply
Old Jun 24, 2016 | 07:12 AM
  #13  
cajundragger's Avatar
TECH Apprentice
iTrader: (2)
 
Joined: Jan 2007
Posts: 345
Likes: 0
Default

Originally Posted by Gripenfelter
Are you doing twins? What is the lag like?
yes twins. I won't find out for a while. I haven't order the turbos yet and the car is a minimum 1 year from driving.
Reply
Old Jun 24, 2016 | 07:18 AM
  #14  
cajundragger's Avatar
TECH Apprentice
iTrader: (2)
 
Joined: Jan 2007
Posts: 345
Likes: 0
Default

you're in the 55lb/min air flow per turbo realm.

I believe a 58/57 precision is 60lb/min. 67/65s look like 90+ from what I can find. That's way too much IMO.
Reply
Old Jun 24, 2016 | 09:35 AM
  #15  
Gripenfelter's Avatar
Thread Starter
TECH Enthusiast
20 Year Member
Liked
Loved
Community Favorite
iTrader: (1)
 
Joined: Oct 2002
Posts: 523
Likes: 58
From: Winnipeg, Manitoba, Canada
Default

Originally Posted by stevieturbo
S366's would be very big and laggy for only 900hp, unless you're a 427 or near.
I'm a 370 ci.

If I blow it up I'll go bigger next time. Just looking for 900 rwhp for now to get my feet wet.

Last setup was 422 rwhp NA.
Reply
Old Jun 24, 2016 | 09:58 AM
  #16  
Gripenfelter's Avatar
Thread Starter
TECH Enthusiast
20 Year Member
Liked
Loved
Community Favorite
iTrader: (1)
 
Joined: Oct 2002
Posts: 523
Likes: 58
From: Winnipeg, Manitoba, Canada
Default

Originally Posted by cajundragger
you're in the 55lb/min air flow per turbo realm.

I believe a 58/57 precision is 60lb/min. 67/65s look like 90+ from what I can find. That's way too much IMO.
What about a Borg Warner S 363? It's supposed to spool faster.
Reply
Old Jun 24, 2016 | 03:44 PM
  #17  
cajundragger's Avatar
TECH Apprentice
iTrader: (2)
 
Joined: Jan 2007
Posts: 345
Likes: 0
Default

s363 looks to comfortably be a 65 lb/min compressor. plenty of head room thats for sure.

TBH, your power goals aren't super high for twins. You really don't need much turbo.

I'm going borgs for the efficiency and lower IATs(hopefully). You may get some knock offs and run them until you build a bigger motor.
Reply
Old Jun 30, 2016 | 11:54 PM
  #18  
Gripenfelter's Avatar
Thread Starter
TECH Enthusiast
20 Year Member
Liked
Loved
Community Favorite
iTrader: (1)
 
Joined: Oct 2002
Posts: 523
Likes: 58
From: Winnipeg, Manitoba, Canada
Default

Went with twin FMW 62 76/68 .88ar t4 turbos with a billet wheel from Borg. The S363's had a 90 degree outlet that wouldn't have worked with my setup unless I were to cut it off and re-weld it. Didn't want to do that.
Reply
Old Jul 1, 2016 | 05:25 AM
  #19  
stevieturbo's Avatar
9 Second Club
 
Joined: Nov 2003
Posts: 13,616
Likes: 185
From: Norn Iron
Default

you can get 363's with the normal straight discharge.

But FMW's will be a better option anyway.
Reply
Old Jul 1, 2016 | 04:46 PM
  #20  
CALL911's Avatar
TECH Addict
iTrader: (17)
 
Joined: Feb 2006
Posts: 2,940
Likes: 2
From: IN
Default

If you are considering Borg Warner, you may want to speak to Little John at LilJohnPerformance.

I am running a Borg Warner S484 I got from him and just did 1,008 RWHP on a 21 year old LT1, and with the race V2 cover I start making boost at 2100 RPM. For the power it makes and the lack of turbo lag, it has been an amazing turbo.
Reply




All times are GMT -5. The time now is 04:45 PM.

story-0
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Slideshow: This heavily modified 1971 Camaro mixes classic muscle car styling with a fifth-generation Camaro interior and modern LS3 power.

By Verdad Gallardo | 2026-05-12 18:06:42


VIEW MORE
story-1
6 Common C5 Corvette Failures and What's Involved In Repairing Them

Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.

By Pouria Savadkouei | 2026-05-07 18:44:57


VIEW MORE
story-2
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.

By Verdad Gallardo | 2026-04-21 13:57:02


VIEW MORE
story-3
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...

By Pouria Savadkouei | 2026-04-16 10:05:15


VIEW MORE
story-4
Top 10 Most Powerful Chevy Trucks Ever Made!

Slideshow: Top ten most powerful Chevy trucks ever made

By | 2026-03-25 09:22:26


VIEW MORE
story-5
Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Slideshow: Hennessey has turned the Silverado ZR2 into a 700-hp off-road monster with supercharged V8 power and a limited production run.

By Verdad Gallardo | 2026-03-24 18:57:52


VIEW MORE
story-6
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.

By Verdad Gallardo | 2026-03-23 18:53:41


VIEW MORE
story-7
Awesome K5 Blazer Restomod Comes With C7 Corvette Power

Slideshow: A heavily reworked 1972 K5 Blazer swaps its off-road roots for a low-slung street-focused build with modern V8 power.

By Verdad Gallardo | 2026-03-09 18:08:45


VIEW MORE
story-8
10 Camaros You Should Never Buy

Slideshow: There are thousands of used Camaros on the market but we think you should avoid these 10

By | 2026-02-17 17:09:30


VIEW MORE
story-9
10 LS Engine Myths That Refuse to Die

Slideshows: Which one of these myths do you believe?

By Verdad Gallardo | 2026-01-28 18:10:11


VIEW MORE