Generation IV External Engine LS2 | LS3 | LS7 | L92 | Bolt-Ons | Intakes | Exhaust | Ignition | Accessories
Sponsored by:
Sponsored by:

L76 vs FAST 90/90

Thread Tools
 
Search this Thread
 
Old Mar 13, 2007 | 02:52 AM
  #1  
transamman400's Avatar
Thread Starter
Launching!
iTrader: (1)
 
Joined: Mar 2004
Posts: 260
Likes: 0
From: Devils Lake, ND
Default L76 vs FAST 90/90

simple question...what is the best possible intake i could buy for my 98 m6 TA. from what ive read these two are the best. right now my car makes approximately about 430 rwhp and am looking to make 450 rwhp AND torque. set up is:

Agostino Heads 296cfm @ .600 intake & 234 @ .600, Comp Cam XE-R 236/236 @.50 .602/.602 @.50 110LS, LS6 Intake, Ported TB, 30lb inj, Whisper Lid, Fast Toys Ramair, March underdrive pullies, Comp R lifters, Flowtech Longtubes, X-Pipe, Dynomax bullets dump @ axle 3.42s
Reply
Old Mar 13, 2007 | 03:00 AM
  #2  
Quickin's Avatar
TECH Veteran
 
Joined: Dec 2001
Posts: 4,117
Likes: 0
From: Ft. Lauderdale, FL, USA
Default

Originally Posted by transamman400
simple question...what is the best possible intake i could buy for my 98 m6 TA. from what ive read these two are the best. right now my car makes approximately about 430 rwhp and am looking to make 450 rwhp AND torque. set up is:

Agostino Heads 296cfm @ .600 intake & 234 @ .600, Comp Cam XE-R 236/236 @.50 .602/.602 @.50 110LS, LS6 Intake, Ported TB, 30lb inj, Whisper Lid, Fast Toys Ramair, March underdrive pullies, Comp R lifters, Flowtech Longtubes, X-Pipe, Dynomax bullets dump @ axle 3.42s
Don't think you'll make 20 RWHP with either intake, unless you have a big cube engine. Maybe close.
Reply
Old Mar 13, 2007 | 09:54 AM
  #3  
SideStep's Avatar
TECH Fanatic
20 Year Member
 
Joined: Mar 2003
Posts: 1,946
Likes: 1
Default

Originally Posted by transamman400
simple question...what is the best possible intake i could buy for my 98 m6 TA. from what ive read these two are the best. right now my car makes approximately about 430 rwhp and am looking to make 450 rwhp AND torque. set up is:

Agostino Heads 296cfm @ .600 intake & 234 @ .600, Comp Cam XE-R 236/236 @.50 .602/.602 @.50 110LS, LS6 Intake, Ported TB, 30lb inj, Whisper Lid, Fast Toys Ramair, March underdrive pullies, Comp R lifters, Flowtech Longtubes, X-Pipe, Dynomax bullets dump @ axle 3.42s
Are you changing heads also??? The L76 intake runners are square (rectangle) not cathedral, if I remember right...

Reply
Old Mar 13, 2007 | 10:09 AM
  #4  
2c5s's Avatar
10 Second Club
20 Year Member
iTrader: (11)
 
Joined: Sep 2003
Posts: 1,676
Likes: 0
From: Murrieta Ca.
Default

Originally Posted by SideStep
Are you changing heads also??? The L76 intake runners are square (rectangle) not cathedral, if I remember right...


Correct, the L76 works on L92 heads, not traditional LS1 cathedral port heads. That's strange, calling a LS1 traditional!
Reply
Old Mar 13, 2007 | 10:09 AM
  #5  
slt200mph's Avatar
TECH Senior Member
20 Year Member
iTrader: (42)
 
Joined: Jul 2003
Posts: 7,067
Likes: 9
From: HOT'LANA, GAWJA
Default

That is not the correct intake for your heads .. the FAST 90/90 combo if it is ported will get you 20-30 hp depending on the motor. See Ron @ Vengeance for a ported FAST 90 intake..
Reply
Old Mar 13, 2007 | 07:16 PM
  #6  
mike c.'s Avatar
10 Second Club
iTrader: (1)
 
Joined: Mar 2002
Posts: 4,031
Likes: 2
From: mi
Default

i gained 23hp(stang dyno) from a only a mild clean up port on my fast 90mm on a 346ci motor..
Reply
Old Mar 14, 2007 | 02:16 PM
  #7  
Jefro6996's Avatar
TECH Enthusiast
iTrader: (21)
 
Joined: Apr 2004
Posts: 528
Likes: 0
From: Macomb, MI
Default

Did you do the port yourself on your fast 90 or did you have someone port it for a 23hp gain??
Reply
Old Mar 14, 2007 | 02:18 PM
  #8  
MrDude_1's Avatar
TECH Junkie
20 Year Member
Photogenic
Photoriffic
Shutterbug
iTrader: (4)
 
Joined: Feb 2002
Posts: 3,368
Likes: 5
From: Charleston, SC
Default

well, one intake fits, the other one requires heads that dont fit on what im assuming is still an LS1 shortblock... so you dont really have a choice... 90/90 or keep your current LS6.
Reply
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?

 Pouria Savadkouei
story-1

Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine

 Verdad Gallardo
story-2

7 Most Reliable High-Performance Engines GM Has Ever Built

 Verdad Gallardo
story-3

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

 Verdad Gallardo
story-4

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

 Pouria Savadkouei
story-5

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

 Verdad Gallardo
story-6

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-7

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-8

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
story-9

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

 Verdad Gallardo
Old Mar 14, 2007 | 05:34 PM
  #9  
Hard Core Z28's Avatar
TECH Regular
 
Joined: Feb 2004
Posts: 450
Likes: 0
From: Over Here and Over There
Default

The fast 90 is designed better, but if you are running a L92 head then the fast wont work for you.
Reply
Old Mar 14, 2007 | 05:38 PM
  #10  
mike c.'s Avatar
10 Second Club
iTrader: (1)
 
Joined: Mar 2002
Posts: 4,031
Likes: 2
From: mi
Default

JEFOR6996-i did it my self w/a dremmel tool. i only cleaned up the area where that lip is in the lower runners. i then hand smoothed it w/fine sand paper. it was easy,but i took my time so not to take off too much and ruin it.
Reply
Old Mar 14, 2007 | 07:17 PM
  #11  
Jefro6996's Avatar
TECH Enthusiast
iTrader: (21)
 
Joined: Apr 2004
Posts: 528
Likes: 0
From: Macomb, MI
Default

I just put my fast 90 on and saw how there is a lip on thre runner. I thought about doing it but got lazy and just threw it on. Next time i get bored ill probably do the same thing. thanks for the info.
Reply
Old Mar 25, 2007 | 12:33 AM
  #12  
NemesisC5's Avatar
TECH Resident
 
Joined: Jan 2007
Posts: 751
Likes: 0
From: Texas
Default

Reply
Old Mar 25, 2007 | 05:30 PM
  #13  
pdd's Avatar
pdd
TECH Veteran
iTrader: (3)
 
Joined: Aug 2003
Posts: 4,156
Likes: 0
From: dudley mass
Default

Originally Posted by mike c.
i gained 23hp(stang dyno) from a only a mild clean up port on my fast 90mm on a 346ci motor..
thats a great gain bro!!
Reply




All times are GMT -5. The time now is 12:47 PM.

story-0
Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?

Slideshow: We take a close look at the ONE and Artidiag 800BT2 diagnostic tools from Topdon and the reasons to buy one over the other.

By Pouria Savadkouei | 2026-05-28 11:05:11


VIEW MORE
story-1
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine

Slideshow: The controversial Ferrari F6 swaps its original flat-12 for a Corvette Z06-derived LT4 V8 and sends power to four rear wheels through a custom-built drivetrain.

By Verdad Gallardo | 2026-05-26 18:23:54


VIEW MORE
story-2
7 Most Reliable High-Performance Engines GM Has Ever Built

Slideshow:These GM engines didn't just make huge power, they survived abuse, boost, track days, and six-digit mileage with a reputation for refusing to quit.

By Verdad Gallardo | 2026-05-21 16:45:27


VIEW MORE
story-3
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-4
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-5
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-6
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-7
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-8
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-9
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