FAST intake manifolds
Thread Starter
Staging Lane
Joined: Nov 2001
Posts: 68
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From: Sydney, Australia
FAST intake manifolds Hi ,
I've just had a 427 CID motor completed and have been testing intake manifolds looking for more horsepower and / or tractability.
A custom sheet metal plenum and velocity stack arrangement was disappointing (runner length was too short for such a slow spinning motor...peak power is at 5,600 rpm). This manifold made an added 20 horses but killed torque down low. Needed a hight reving motor to capitalise on it's ability to move air). The build is using a fairly mild cam considering displacement (low 24x/24x @ .580 lift with tight lobe centres).
I've elected to keep a port shaped LS6 manifold for now as it makes better power under the curve.
I am now interested in the range of FAST manifolds. These look to have a better (longer) length runner and can be ported and shaper easily....might be good for some added horses without hollowing out the 'middle' of the power and torque curves.
Anyone here had a play with these on a 'big-banger' yet?.....if so, how did it perform? There's a trade show in Indy soon and I'd like to get one brought home for me .... if someone can tell me if it's worth getting.
I've just had a 427 CID motor completed and have been testing intake manifolds looking for more horsepower and / or tractability.
A custom sheet metal plenum and velocity stack arrangement was disappointing (runner length was too short for such a slow spinning motor...peak power is at 5,600 rpm). This manifold made an added 20 horses but killed torque down low. Needed a hight reving motor to capitalise on it's ability to move air). The build is using a fairly mild cam considering displacement (low 24x/24x @ .580 lift with tight lobe centres).
I've elected to keep a port shaped LS6 manifold for now as it makes better power under the curve.
I am now interested in the range of FAST manifolds. These look to have a better (longer) length runner and can be ported and shaper easily....might be good for some added horses without hollowing out the 'middle' of the power and torque curves.
Anyone here had a play with these on a 'big-banger' yet?.....if so, how did it perform? There's a trade show in Indy soon and I'd like to get one brought home for me .... if someone can tell me if it's worth getting.
Last edited by 8POTS; Nov 23, 2003 at 03:46 AM.
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The new single plane GMPP intake will be the ticket for max power. It's comes out in 04 and I have contacts that have the pre-production piece in hand. It's designed for using a carb or port fuel injection with a TB.
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Originally Posted by 99 Black Bird T/A
The new single plane GMPP intake will be the ticket for max power. It's comes out in 04 and I have contacts that have the pre-production piece in hand. It's designed for using a carb or port fuel injection with a TB.
TECH Regular
Joined: Nov 2001
Posts: 470
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From: Plano, Tx.
Launching!
Joined: May 2003
Posts: 200
Likes: 0
Originally Posted by Cobraeater
We have a custom sheetmetal intake for the bigbore motors. I have listed specs and info in the external and sponsor sections. It will be exactly what you are looking for. Give me a call and I can work something out for you.
Nate
Nate
And yes, the FAST is a massive upgrade over the LS1's stock intake manifold. Although, it depends on what other mods you have done to the car and what you consider "a whole lot of hp".
Did you guys seriously just dig up an 8 yr old post??
Check this out.
https://ls1tech.com/forums/search.php
Check this out.
https://ls1tech.com/forums/search.php