Edelbrock's LT1 / LT4 intake
Thread Starter
Race Director
Joined: Feb 2001
Posts: 13,913
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From: Manassas VA
NoVa Events Coordinator
St. Jude Donor '14
Edelbrock's LT1 / LT4 intake
Looks like they are getting close to release!
here are the install instructions with information about the intakes. Enjoy!
http://www.edelbrock.com/automotive_.../7000/7109.pdf
Hope this isn't a dupe.
here are the install instructions with information about the intakes. Enjoy!
http://www.edelbrock.com/automotive_.../7000/7109.pdf
Hope this isn't a dupe.
Thread Starter
Race Director
Joined: Feb 2001
Posts: 13,913
Likes: 101
From: Manassas VA
NoVa Events Coordinator
St. Jude Donor '14
Originally Posted by Strick
With the supply of LT4 intakes getting smaller, this might be the way to go if upgrading a LT1 to a LT4. Will continue to 
Le Mans Master
Joined: Aug 2004
Posts: 5,141
Likes: 7
From: Metairie Louisiana
So does anyone want to guess how much of a gain will be had from the LT4 intake, heads, TB, and cam on a mostly stock LT1? What about just the new intake? Will they be powder coated? How much longer before the intake will be released?
Thanks
Thanks
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Team Owner
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From: Boston, Dallas, Detroit, SoCal, back to Boston MA
I wonder what the runner length is?
EGR SYSTEMS: The Performer RPM Air-Gap LT1/LT4 intake manifolds are intended as a direct functionally identical replacement for their O.E.M. counterparts. All exhaust emissions or emissions related stock components are intended to be retained and functional.
Le Mans Master
Joined: Jul 2000
Posts: 5,012
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From: OKC OK
Originally Posted by Bluewasp
it will be the only way!
Last edited by LT4POWR; Sep 4, 2006 at 06:18 PM.
Safety Car
Joined: Sep 2000
Posts: 3,524
Likes: 4
From: Hinckley Ohio
Originally Posted by LT4POWR
Actually the OEM LT1 intake can be welded & ported to work w/ LT4 type heads. I would be very surprised if this intake made any more power than OEM. The "Air Gap" reduces the aleady lacking plenum volume. I you ask me Edelbrock really missed the mark with this one...I think there is a good size market for decently priced cast bolt-on performance (not factory repacement) LTx intakes. Look at what the Ford 5.0 guys have to choose from.
Hope they provide some kind of before/after dyno.....
I also wonder if they match the ...000777 LT4 intake gasket....which is what a lot of us have had our heads port matched to..
Pro
Joined: Mar 2001
Posts: 699
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From: Camp Hill PA
Originally Posted by Bluewasp
someone told me edelbrock made the LT1/LT4 intake for GM. Anyone know this to be fact?
Intermediate
Joined: Mar 2004
Posts: 26
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Y'all need to get your story straight. 
The only reason why the original manifold died back in the mid 90's was not from the lack of demands or some backdoor agreement with GM, but because they could not successfully cast the intakes on a repeated basis. It was a manufacturing failure.
Today we have wonderful 3-D CAD systems being used with stereolithography to work out the manufacturing bugs before the components are even cast.
The problem with the original LT1 or LT4 intakes is not with the volume flow, bit it's short runners. TPI we too long, Gen II were to short and Gen III were just right. Just like Goldilock and the 3 bears.
The lack of runners hurt the low and mid range torque. Any apprecible increase can easily add another 45 to 55 ft-# of torque between 3200-4200 rpm, while not losing out in the HP category till 5300-5700 rpm.
The only reason why the original manifold died back in the mid 90's was not from the lack of demands or some backdoor agreement with GM, but because they could not successfully cast the intakes on a repeated basis. It was a manufacturing failure.
Today we have wonderful 3-D CAD systems being used with stereolithography to work out the manufacturing bugs before the components are even cast.
The problem with the original LT1 or LT4 intakes is not with the volume flow, bit it's short runners. TPI we too long, Gen II were to short and Gen III were just right. Just like Goldilock and the 3 bears.
The lack of runners hurt the low and mid range torque. Any apprecible increase can easily add another 45 to 55 ft-# of torque between 3200-4200 rpm, while not losing out in the HP category till 5300-5700 rpm.
Safety Car
Joined: Dec 2002
Posts: 3,655
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From: Charleston SC
The instructions have been out for over a year and I called them back in Feb of this year and they stated the intake was still under development; my guess is it will never be built. There was a pretty long post on this back several months ago and a link to the same sheet posted here was available then. I hope it does get built but am not holding my breath
Le Mans Master
Joined: Aug 2004
Posts: 5,141
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From: Metairie Louisiana
Originally Posted by fredk
It is advertised in a perf. mag. that I just picked up yesterday. One for the LT1 and one for the LT4. It's in GM High Tech Performance.
Fred
Fred
