ls1, high compression plus boost? - Yellow Bullet Forums

Go Back   Yellow Bullet Forums > Technical Section > LSX, Mod Motor and Gen III Hemi Tech

Reply
 
Thread Tools Display Modes
Old 06-16-2012, 04:05 PM   #1
mark21742
Senior Member
Smoked another BBC
 
mark21742's Avatar
 
Join Date: May 2012
Location: Mercersburg PA
Posts: 1,281
Default ls1, high compression plus boost?

You guys on here seam to be doing a lot of insane out of the box stuff and making crazy power so I want to get your thoughts, opinions and ideas on this.

I'm building a tube chassis 04 GTO that I plan on having weigh in at 2,500-2,700 lbs, tubbed widebody, 3 speed manual.

I need to have it run on 92-93 pump gas and handle daily driving on the street if o get the urge to take it back and forth to work on nice days.

Current setup is
fully forged 408 lq4/9 iron block
Ported/milled 241s with 57cc chambers
Ported Edelbrock proflo xt
90mm FAST tb
Comp cams 255/263 .624/.624 115 lsa cam
Running 12.5:1 scr, and 8.22:1 dcr on 92-93 pump gas, 27 degrees timing and zero knock.
just over 650 rwhp currently with fuel cut set at 8,000 rpms

I'm looking at the possiblility of boosting it and building the setup with lag in it by either using two large turbos, or a bov of some type to keep it at 0 or close boost until it is up past 4,000 plus rpm where knock is harder to have occur.

Any thoughts, ideas or opinions? What kind of power could I make and what kind of boost?

Thank you
Mark
mark21742 is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 06-16-2012, 07:32 PM   #2
edcmat-l1
Senior Member
Smoked another BBC
 
Join Date: Nov 2009
Posts: 2,080
Default Re: ls1, high compression plus boost?

Good luck with that. You'll never keep the heads on it.
__________________
EFI SPECIALIST
Tuning, Advanced diagnostics, Emissions
HPTuners, EFIlive, Tunercat, Edit, SCT, Diablosport, Cobb, ECUFlash, WinOLS
Tuning all GMs, Ford, Mopar, Nissan GT-Rs, Evos, WRXs, Euros
ONLINE STORE COMING SOON!
edcmat-l1 is offline   Reply With Quote
Old 06-16-2012, 07:38 PM   #3
edcmat-l1
Senior Member
Smoked another BBC
 
Join Date: Nov 2009
Posts: 2,080
Default Re: ls1, high compression plus boost?

Quote:
Originally Posted by mark21742 View Post
You guys on here seam to be doing a lot of insane out of the box stuff and making crazy power so I want to get your thoughts, opinions and ideas on this.

I'm building a tube chassis 04 GTO that I plan on having weigh in at 2,500-2,700 lbs, tubbed widebody, 3 speed manual.

I need to have it run on 92-93 pump gas and handle daily driving on the street if o get the urge to take it back and forth to work on nice days.

Current setup is
fully forged 408 lq4/9 iron block
Ported/milled 241s with 57cc chambers
Ported Edelbrock proflo xt
90mm FAST tb
Comp cams 255/263 .624/.624 115 lsa cam
Running 12.5:1 scr, and 8.22:1 dcr on 92-93 pump gas, 27 degrees timing and zero knock.
just over 650 rwhp currently with fuel cut set at 8,000 rpms

I'm looking at the possiblility of boosting it and building the setup with lag in it by either using two large turbos, or a bov of some type to keep it at 0 or close boost until it is up past 4,000 plus rpm where knock is harder to have occur.

Any thoughts, ideas or opinions? What kind of power could I make and what kind of boost?

Thank you
Mark
Sounds like a total bullshit post. You got a dyno graph? 3 speed manual? 650 HP at the wheels? Out of a 408 with 241s? Yeah, total bullshit.
__________________
EFI SPECIALIST
Tuning, Advanced diagnostics, Emissions
HPTuners, EFIlive, Tunercat, Edit, SCT, Diablosport, Cobb, ECUFlash, WinOLS
Tuning all GMs, Ford, Mopar, Nissan GT-Rs, Evos, WRXs, Euros
ONLINE STORE COMING SOON!
edcmat-l1 is offline   Reply With Quote
Old 06-16-2012, 08:51 PM   #4
Shum
Senior Member
Smoked another BBC
 
Join Date: Dec 2008
Location: Kentucky
Posts: 1,948
Default Re: ls1, high compression plus boost?

Maybe he meant manual valve body? 650 to the tire with that setup is far fetched though unless its on a 150-200 shot..

FWIW we just put my old stock cube nitrous motor in my car with my turbo setup on it and it done pretty well. It's 11.5: 1 with Absolute speed stg. 2.5 heads. We used my turbo cam out of the 6.0 that was in it before we streched the stock rod journals. Here's a comparison in the 2 setups.

Stock LS2 w/l92's made 964 rwhp @ 17psi
11.5: 1 347" w/ ported 853' s made 923rwhp @ 19psi

Same tranny and converter in both setups. Glide and Edge converter that was setup for my old nitrous setup.

The LS2 setup didnt live long enough to make any passes but the 347 went 5.75@124 and 8.92@159 with a crappy 1.40 60' a few weeks ago. That was on 16psi.

FWIW I am running e85 and have an a2w setup on it too.

No issues with lifting the heads thus far... Oh, the LS2 setup only had arp head bolts too, no studs. Still never pushed a drop! GM mls gaskets ftw!
__________________
TUNED BY BLUECAT
99 Z28- 347- Turbo - E85

Last edited by Shum; 06-16-2012 at 08:53 PM.
Shum is offline   Reply With Quote
Old 06-16-2012, 10:55 PM   #5
Widow_Maker
Chupa Cabra
Smoked Another SBC
 
Widow_Maker's Avatar
 
Join Date: Jul 2011
Location: Mcleansville, NC
Posts: 9,335
Default Re: ls1, high compression plus boost?

Is it a Liberty or Jericho transmission? He did say big tire car ed which leads me to think that it's got a g-force or liberty "manual" trans in it.
__________________
RTCTTFMF!!!



Tick Performance
Mount Airy, NC
336.719.0599 Martin
Widow_Maker is offline   Reply With Quote
Old 06-16-2012, 11:16 PM   #6
biggreen1
Junior Member
Launchin
 
biggreen1's Avatar
 
Join Date: Sep 2010
Posts: 329
Default Re: ls1, high compression plus boost?

What he said.^^^^^
__________________


410LSX Vortech xb105
PB:4.97@143 on 275's 3350lbs.
biggreen1 is offline   Reply With Quote
Old 06-16-2012, 11:18 PM   #7
edcmat-l1
Senior Member
Smoked another BBC
 
Join Date: Nov 2009
Posts: 2,080
Default Re: ls1, high compression plus boost?

Quote:
Originally Posted by Widow_Maker View Post
Is it a Liberty or Jericho transmission? He did say big tire car ed which leads me to think that it's got a g-force or liberty "manual" trans in it.
Yeah, OK, maybe. I'll give ya that. But 650 rwhp out of a 408 with 241s?
__________________
EFI SPECIALIST
Tuning, Advanced diagnostics, Emissions
HPTuners, EFIlive, Tunercat, Edit, SCT, Diablosport, Cobb, ECUFlash, WinOLS
Tuning all GMs, Ford, Mopar, Nissan GT-Rs, Evos, WRXs, Euros
ONLINE STORE COMING SOON!
edcmat-l1 is offline   Reply With Quote
Old 06-17-2012, 02:04 AM   #8
Shum
Senior Member
Smoked another BBC
 
Join Date: Dec 2008
Location: Kentucky
Posts: 1,948
Default Re: ls1, high compression plus boost?

He said "he's building....." A tube chassis, bla, bla, bla...
__________________
TUNED BY BLUECAT
99 Z28- 347- Turbo - E85
Shum is offline   Reply With Quote
Old 06-17-2012, 07:34 PM   #9
pebbs2010
Junior Member
Burnout box
 
Join Date: May 2012
Posts: 1
Default Re: ls1, high compression plus boost?

I know he asked for opinions and all but you don't need to bash on his car I've been here with him through the build and I can vouche for him so if someone can answer the boost question if you can.
pebbs2010 is offline   Reply With Quote
Old 06-17-2012, 08:56 PM   #10
turboberserker
Junior Member
Spooled up
 
turboberserker's Avatar
 
Join Date: Nov 2011
Posts: 243
Default Re: ls1, high compression plus boost?

at 12.5:1 scr, there's not much room for boost with 93.
turboberserker is offline   Reply With Quote
Old 06-17-2012, 09:47 PM   #11
koolrayz
Moderator
Smoked another BBC
 
koolrayz's Avatar
 
Join Date: Sep 2008
Location: Mansfield Ohio
Posts: 2,538
Default Re: ls1, high compression plus boost?

You never stated what your goals were?
I wouldnt think you could put much boost to a setup like that on pump gas.
It really is a guess as your setup is so missmatched. You really should consider spraying that setup untill you can afford to do a boosted setup correctly.
__________________
1998 Camaro X275 ERL motor, Midwest Chassis Suspension, Garrett 88mm turbo, AEICNC, Design Engineering, Wiseco, Shearer fabrications, Driveshaft shop, All Pro heads, RPM transmission, PTP performance, Big Stuff 3
Like WWW.facebook.com/koolrayzracing

koolrayz is offline   Reply With Quote
Old 06-17-2012, 10:05 PM   #12
Corn_Fed
Junior Member
Spooled up
 
Join Date: Feb 2012
Posts: 149
Default Re: ls1, high compression plus boost?

i wouldnt waste my time especially when there is such a big ls market. Why not part out this build and do a more boost friendly build, id put some nitrous on it and call it a day if ya wanna stay with that compression.
Corn_Fed is offline   Reply With Quote
Old 06-17-2012, 10:37 PM   #13
ShorTuning
LSXTTFMF
Pullin gears
 
Join Date: Feb 2010
Location: Danville, KY
Posts: 887
Default Re: ls1, high compression plus boost?

I'd pull the shitty heads and put a larger chamber head on it to get the compression back down a touch and slap a T6 91mm turbo on it with some E85. You're wasting your time with those heads and compression on pump gas with boost.
__________________
James Short
ShorTuning is offline   Reply With Quote
Old 06-17-2012, 11:17 PM   #14
Pro Stock John
Senior Member
Smoked Another SBC
 
Pro Stock John's Avatar
 
Join Date: Sep 2007
Location: Chicago, IL
Posts: 8,363
Default Re: ls1, high compression plus boost?

Alchohol?
__________________
LSX Record List:http://www.planetlsx.com/forums/showthread.php?t=5431
Pro Stock John is offline   Reply With Quote
Old 06-17-2012, 11:55 PM   #15
Preacher's Kid
Senior Member
Smoked another BBC
 
Preacher's Kid's Avatar
 
Join Date: May 2005
Location: MD
Posts: 2,382
Default Re: ls1, high compression plus boost?

shum, does the 347 have head studs now? i'm looking to do something similar. 370", ported 243's, 11.5:1 scr, wanting to do a single on e85...
__________________
Matt

6.0/t56 thirdgen....10.48 @ 131.8
"Like" MotorManiaTV on Facebook!
Preacher's Kid is offline   Reply With Quote
Reply

Thread Tools
Display Modes

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



All times are GMT -4. The time now is 08:06 AM.


Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Garage Plus vBulletin Plugins by Drive Thru Online, Inc.
Resources saved on this page: MySQL 3.08%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Yellow Bullet LLC