? hp output of lsx carberated race w/ls 7 heads - LS1TECH - Camaro and Firebird Forum Discussion



Carbureted LSX Forum Carburetors | Carbed Intakes | Carb Tuning Tips for LSX Enthusiasts

? hp output of lsx carberated race w/ls 7 heads

Reply
 
Thread Tools Search this Thread
Old 12-02-2017, 02:30 PM   #1
Registered User
Thread Starter
 
Join Date: Dec 2017
Posts: 3
Default ? hp output of lsx carberated race w/ls 7 heads

wanting to build lsx 427cu or bigger to replace my 525 cu bbc, what kind of power can be made for 427 - 480 cu in with carb, dom. on gas or alky
top3598 is offline   Reply With Quote
Old 12-02-2017, 04:29 PM   #2
TECH Junkie
 
Join Date: Jun 2016
Posts: 3,164
Default

Based upon the info given, quite a bit!
G Atsma is offline   Reply With Quote
Old 12-02-2017, 04:34 PM   #3
Old School Heavy
iTrader: (16)
 
speedtigger's Avatar
 
Join Date: May 2010
Location: Florida
Posts: 8,684
Default

It just depends on your budget and any other practicsl limitations your application might have. Dart built a 400" LS that made 1166 hp at 10,300 RPM.
speedtigger is offline   Reply With Quote
Old 12-03-2017, 05:51 AM   #4
10 Second Club
 
Doug G's Avatar
 
Join Date: Aug 2010
Location: Harford Co. Maryland
Posts: 3,598
Default

What HP is the BBC that's getting replaced ?
What HP you looking to build ?

Seeing some of the builds on here, I don't think you'll need that many inches
Doug G is offline   Reply With Quote
Old 12-03-2017, 11:10 AM   #5
On The Tree
iTrader: (3)
 
axe murderer's Avatar
 
Join Date: Jan 2012
Posts: 106
Default

axe murderer is offline   Reply With Quote
Old 12-03-2017, 02:05 PM   #6
Old School Heavy
iTrader: (16)
 
speedtigger's Avatar
 
Join Date: May 2010
Location: Florida
Posts: 8,684
Default

Quote:
Originally Posted by axe murderer View Post
That article seems to be tragically short of details.
speedtigger is offline   Reply With Quote
Old 12-03-2017, 07:05 PM   #7
Registered User
Thread Starter
 
Join Date: Dec 2017
Posts: 3
Default

thanks speedtigger, yes the budget will allow alot but not looking for that much, have picked up lsx short deck block and set of used ls7 heads complete for pennies,
i'm a old school t/s racer and sold my 632 and build 525 for daughter to continue bracket or heads up racing, so have little experiance in ls stuff, we made around 800 hp on 525 but if i can make or even more with the lsx stuff , it removes alot of weight from frt of car.
so my questions and i know it so broad on how much power can be made with the ls stuff [ without breaking the bank, or just keep bbc in it and sell ls parts] and what type of rotating assm. would be need and suggestions on cam shaft, manifold for carburated deal. any help would be appreciated
top3598 is offline   Reply With Quote
Old 12-03-2017, 07:22 PM   #8
Registered User
Thread Starter
 
Join Date: Dec 2017
Posts: 3
Default

thanks axe murderer for video, sounds very good
have cast lsx short deck , and complete ls7 heads, was told 800 is fairly easy to make with ls stuff and carburated, just looking for some information and guidance what it takes to build that type of hp.
camming and whos and what manifold work best or sending one to be ported also
compression ratio
appreciate your responce
top3598 is offline   Reply With Quote
Old 12-04-2017, 12:03 AM   #9
TECH Fanatic
 
Join Date: Aug 2009
Location: Coast of San Mateo County Between Pacifica & HMB
Posts: 1,246
Default

Custom Cam Motion LLSR,
CID Intake (Carb)
Two places to start.
Compression depends on fuel obviously, (E85 or Race Fuel)
NAVYBLUE210 is offline   Reply With Quote
Old 12-04-2017, 10:52 AM   #10
LS1Tech Sponsor
 
Join Date: Jan 2009
Location: Santa Ana, CA. USA
Posts: 1,447
Default GMPP Intake + Wegner Water Pump

Hi 3598, I work with Carl Wegner, with MY reports of 650-700 HP as common depending on Cam Duration/Compression.

I have stock of the GMPP LS-7 Intake Manifold.
I have stock of the Wegner Water Pump "pictured".
I have stock of MY IGN-8 Ignition with GEN-IV coils OR IGN-1A coils.

I would fit one of my 4.10" forged crankshaft, forged rod, forged piston assemblies.

I would fit a Crower Cams SOLID roller AND fit Lash Caps to the exhaust
valves now allowing Lash Adjustment with OEM LS-7 rocker arms updated with CHE's.

Lance
Pantera EFI is offline   Reply With Quote
Old 12-04-2017, 10:57 AM   #11
LS1Tech Sponsor
 
CAMMOTION PERF's Avatar
 
Join Date: Dec 2014
Posts: 359
Default

Quote:
Originally Posted by top3598 View Post
thanks speedtigger, yes the budget will allow alot but not looking for that much, have picked up lsx short deck block and set of used ls7 heads complete for pennies,
i'm a old school t/s racer and sold my 632 and build 525 for daughter to continue bracket or heads up racing, so have little experiance in ls stuff, we made around 800 hp on 525 but if i can make or even more with the lsx stuff , it removes alot of weight from frt of car.
so my questions and i know it so broad on how much power can be made with the ls stuff [ without breaking the bank, or just keep bbc in it and sell ls parts] and what type of rotating assm. would be need and suggestions on cam shaft, manifold for carburated deal. any help would be appreciated
I think a 13.5:1 440" engine is a perfectly reasonable combo cost wise. Throw on some cutting edge LS7 heads and intake and you can make 800 for sure.

My personal street car engine made over 700 HP on pump gas and I drive it all over town. So, 800 for a racecar won't be a problem.

We can certainly help you with your camshaft once you get your heads and intake selected. Just reach out to me when you are ready!

~Steven
__________________


The Switch Is On To Cam Motion!
40 years of Championship Winning Experience Superior 8620 Steel Camshaft Cores Quiet, Smooth & Powerful Lobe Design Virtually Unlimited Lift and Duration Combinations Finish Polished For Quiet Operation Cam Doctor Printout With All Cams
The Industry's Best Customer Service

www.CamMotion.com ☎ 225-926-6110 Like Us On Facebook!
CAMMOTION PERF is offline   Reply With Quote
Old 12-04-2017, 01:43 PM   #12
On The Tree
iTrader: (3)
 
axe murderer's Avatar
 
Join Date: Jan 2012
Posts: 106
Default

Quote:
Originally Posted by speedtigger View Post
That article seems to be tragically short of details.
I think it was originally in Circle Track but is now on Hot Rod's site, 3 part series but still seems like they lost some in the site move.
http://www.hotrod.com/articles/next-...n-race-engine/
http://www.circletrack.com/enginetec..._build_part_2/
http://www.circletrack.com/enginetec..._build_part_3/
axe murderer is offline   Reply With Quote
Old 12-07-2017, 07:26 AM   #13
In-Zane Moderator
iTrader: (25)
 
ZONES89RS's Avatar
 
Join Date: Jan 2007
Location: Conroe, Texas
Posts: 11,718
Default

427 cubes, a nice CNC program on LS7 castings, solid roller with compression should see 850 without trying.
ZONES89RS is offline   Reply With Quote
Reply


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 Off
Refbacks are Off



All times are GMT -5. The time now is 03:18 AM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: