LS1 intake vs LS6 Intake

Reply Subscribe

Thread Tools

Search this Thread

Apr 12, 2007 | 10:11 PM

thels1kid

Thread Starter

Heel & Toe

Joined: Mar 2007

Posts: 16

Likes: 0

From: Columbia South Carolina

LS1 intake vs LS6 Intake

I have a 98 LS1. Pretty peaked without major work about 396hp at the wheels, I want to change My intake manifold for a LS6. Will that do much for me and is there a down fall? Or will it work at all.

Apr 12, 2007 | 10:19 PM

cruisemon

Melting Slicks

Joined: May 2000

Posts: 2,498

Likes: 4

From: Brentwood TN

Quote:

Originally Posted by thels1kid

I have a 98 LS1. Pretty peaked without major work about 396hp at the wheels, I want to change My intake manifold for a LS6. Will that do much for me and is there a down fall? Or will it work at all.

Dude - 396 ponies says you probably have added a cam and/or maybe done a little head work, maybe long tube headers. If that is the case, the LS6 PLUS a good tune should help put the number on the other side of 400.

Charlie

Apr 12, 2007 | 10:25 PM

SLPRC5

Le Mans Master

Joined: Aug 2003

Posts: 9,298

Likes: 4

From: American Canyon Lethal Injection

Quote:

Originally Posted by cruisemon

or a very rare '98. Which brand dyno was used?
Yes the LS6 intake is a very good mod..go for it

Apr 12, 2007 | 10:31 PM

Tigershark3

Melting Slicks

Joined: Aug 2005

Posts: 2,996

Likes: 61

From: Fort Wayne IN

"396 RWHP without major work" Doubt it. It would help if you filled out your profile.

Apr 12, 2007 | 10:31 PM

Lynch Z06

Pro

Joined: Apr 2006

Posts: 565

Likes: 74

From: Houston Texas

I've got one for sale....if you want one.

Apr 12, 2007 | 10:39 PM

2000whitec5

Burning Brakes

Joined: Feb 2006

Posts: 917

Likes: 0

From: 10.54 @ 129 346 N/A A4 Record 9.78 @ 139+ on 150 shot

I went from the ls1 to the fast 90/90 set up picked up 25rwhp and 20tq
when my car was cam only... my friend with a simalar set up went with ls6 and picked up 12/10

Apr 12, 2007 | 11:24 PM

STLKillerC5

Pro

Joined: May 2006

Posts: 593

Likes: 12

From: Maryland Heights MO

LS6 intake should get you an extra 12-15 RWHP. The question is..is that small gain really worth the $500 for the intake and more $$$ for a tune?? I would save my money if I were you.

Apr 12, 2007 | 11:30 PM

vetterlatethannever

Race Director

Joined: Dec 2003

Posts: 12,599

Likes: 1

From: Texas

On my car which has cam, L/T headers, intake and U/D pulley the LS6 netted me 4.54 RWHP. Same day, same dyno. MTI forgot to install it with my other mods so they installed and dyno'd it immediately after. Didn't pick up the 12-15 they said it would.......

Should get you to 400 though.

Corvette Stories

The Best of Corvette for Corvette Enthusiasts

5 Best & 5 Most Overrated Corvette Track Packages of All Time!

Joe Kucinski

Every 2027 Corvette Engine Explained

Joe Kucinski

Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette

Verdad Gallardo

10 Ugly Corvettes That We Still Kinda Love

Joe Kucinski

Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

Brett Foote

10 Things Every Corvette Owner Needs (2026 Edition)

Michael S. Palmer

8 Most "Only Corvette Owners Understand" Quirks and Problems

Pouria Savadkouei

10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years

Joe Kucinski

How Much Horsepower Every Corvette Engine "LOST" in 1972

Joe Kucinski

Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

Michael S. Palmer

Apr 12, 2007 | 11:53 PM

IFLUBYU

Drifting

Joined: May 2003

Posts: 1,715

Likes: 1

From: cAshburn VA

Quote:

Originally Posted by vetterlatethannever

Should get you to 400 though.

Maybe a few over, worth it in my view, very easily done.

You will need a coolant tube bypass kit, the LS6 intake does not have space underneath for the coolant tube.

Apr 12, 2007 | 11:54 PM

#10

nitrojunky

Burning Brakes

Joined: Sep 2001

Posts: 893

Likes: 38

From: ATX

Quote:

Originally Posted by STLKillerC5

LS6 intake should get you an extra 12-15 RWHP. The question is..is that small gain really worth the $500 for the intake and more $$$ for a tune?? I would save my money if I were you.

Mine was right at $300.

Apr 12, 2007 | 11:55 PM

#11

madmatt9471

Team Owner

Joined: May 2006

Posts: 21,473

Likes: 356

From: Palmdale, Ca----- 2009 Cyber Gray 4LT A6 F55 452 RWHP 422 RWTQ- RIP 1998 C5 734 RWHP & 585 RWTQ-----

Quote:

Originally Posted by cruisemon

YUP! Over 400HP would be what the doctor ordered along with the prescribed LS6 manifold.

I also just seen one for sale in the for sale section!

Check these out!
http://www.tpis.com/plog/index.php?o...Id=14&blogId=1

http://www.ls1howto.com/index.php?article=5

These give you some before and after numbers to look at too!

Thanks,Matt

Apr 12, 2007 | 11:56 PM

#12

mvvette97

Melting Slicks

Joined: May 2005

Posts: 3,394

Likes: 12

From: Leon Iowa

St. Jude Donor '06-'07-'08-'09

Quote:

Originally Posted by IFLUBYU

Maybe a few over, worth it in my view, very easily done.

You will need a coolant tube bypass kit, the LS6 intake does not have space underneath for the coolant tube.

He could also just grind the fins down on the bottom of the intake. I did it that way with no problem

Apr 13, 2007 | 07:46 AM

#13

99 vett babycar

Melting Slicks

Joined: Dec 2003

Posts: 2,857

Likes: 2

From: pawleys island sc

Quote:

Originally Posted by mvvette97

He could also just grind the fins down on the bottom of the intake. I did it that way with no problem

Apr 13, 2007 | 10:09 AM

#14

madmatt9471

Team Owner

Joined: May 2006

Posts: 21,473

Likes: 356

From: Palmdale, Ca----- 2009 Cyber Gray 4LT A6 F55 452 RWHP 422 RWTQ- RIP 1998 C5 734 RWHP & 585 RWTQ-----

Quote:

Originally Posted by mvvette97

He could also just grind the fins down on the bottom of the intake. I did it that way with no problem

Don't do that unless you are very skilled! If you do you can very very easily take off too much material and put a hole in the bottom of the manifold

IT IS NOT RECOMMENDED TO GRIND THE BOTTOM OF THE LS6 MAIFOLD!

It is only about $60.00 for the two plugs for the rear and the bypass tube! It is simpler and safer to do! You will also save much time doing it this way!

Perhaps do a post to see everyone's who's done a LS6 manifold swap what they would do!

You got my vote here for the bypass kit!

If you need the GM part numbers for the plugs and bypass tube let me know!

Thanks,Matt

Apr 13, 2007 | 10:15 AM

#15

kilrb

Pro

Joined: Jan 2005

Posts: 559

Likes: 1

From: Lenexa Kansas

Quote:

Originally Posted by Tigershark3

"396 RWHP without major work" Doubt it. It would help if you filled out your profile.

You don't get to 396 with minor mods.

Apr 13, 2007 | 10:21 AM

#16

cruisemon

Melting Slicks

Joined: May 2000

Posts: 2,498

Likes: 4

From: Brentwood TN

Quote:

Originally Posted by kilrb

You don't get to 396 with minor mods.

I don't know man. I heard about a guy who put one of those J.C. Whitney water vapor things and two of the fuel line magnets on '77 L48 and the horsepower went up from 148 to 152 with no other changes. And for the skeptics, that was on a for real dyno. Plus it was on that alt.auto.corvette newsgroup so you know it has to be documented and true.

Charlie

Apr 13, 2007 | 04:17 PM

#17

AU N EGL

Team Owner

Joined: Sep 2003

Posts: 43,084

Likes: 33

From: Raleigh / Rolesville NC

Quote:

Originally Posted by Tigershark3

"396 RWHP without major work" Doubt it. It would help if you filled out your profile.

especially in a 98.

a 2002 and newer LS6 with a tune only can get 370-375+/- rwhp and with 100 octane up to 385 rwhp

This is what the SCCA T1 race vettes run.

or do you mean 296 rwhp ?? 1998 had 345 fwhp x .85 = 293 rwhp

Last edited by AU N EGL; Apr 13, 2007 at 04:19 PM.