FAST Intakes - Options
Discussion
I've been looking at the FAST intakes, there seem to be a couple of options notibly on trottle body size 92mm or 102mm. I was wondering who is using a FAST intake and what sorts of benefits they gained from using one? I'm just information gathering at the moment as I don't really know much about them.
This thread is perfect timing as I'm looking into this myself to complete the work on my car. As far as I can see, the 102mm is the only one they do now - the 90/92mm is an older model. To my mind it seems expensive for what it is but from what I can see it's the only intake option for our cars at the moment. There is the MSD one that I'm looking into but from what I've read it doesn't fit too well (requires modifications to the water pump). Also looking at the list price it's not much cheaper than the FAST which is established and has proven gains.
I'll sit and watch this thread with interest.
I'll sit and watch this thread with interest.
300bhp/ton said:
Have a look here:
http://www.pistonheads.com/gassing/topic.asp?h=0&a...
Can't argue with that really, it presents a lot of the options!http://www.pistonheads.com/gassing/topic.asp?h=0&a...
It's correct to say that they only do the 102 now. I am using one and currently still have a normal LS2 throttle body. Stock fuel rails worked fine with it too.
One thing you do need to do is remove the rear engine lifting eye, as the manifold fouls that. The bolts for this are a bit of a b
d to get to on our cars, and mine were done up pretty tight, so I would recommend removing that first before you touch anything else when you come to do the install.The install other than that couldn't be simpler
The stock LS2 manifold is the worst of the LS series by all accounts, so we are at least in the position to gain the most from just a manifold swap.
As far as downsides, other than the cost (I got mine second hand unused from a forum member, very lucky!) the material doesn't absorb as much noise so you get a bit more of the 'sewing machine' sound, although it's only really noticeable when you're stood in front of it with the bonnet up, and they already sound like a sewing machine anyway!
Would suggest a remap at some point if doing the swap, so that adds to the expense too.
Driving it back to back after the swap, it felt like it really picked up from about 4k onwards, suddenly felt a lot more urgent (not quite VTEC yo, but you get the idea!)
SturdyHSV said:
Can't argue with that really, it presents a lot of the options!
It's correct to say that they only do the 102 now. I am using one and currently still have a normal LS2 throttle body. Stock fuel rails worked fine with it too.
One thing you do need to do is remove the rear engine lifting eye, as the manifold fouls that. The bolts for this are a bit of a bd to get to on our cars, and mine were done up pretty tight, so I would recommend removing that first before you touch anything else when you come to do the install.
The install other than that couldn't be simpler
The stock LS2 manifold is the worst of the LS series by all accounts, so we are at least in the position to gain the most from just a manifold swap.
As far as downsides, other than the cost (I got mine second hand unused from a forum member, very lucky!) the material doesn't absorb as much noise so you get a bit more of the 'sewing machine' sound, although it's only really noticeable when you're stood in front of it with the bonnet up, and they already sound like a sewing machine anyway!
Would suggest a remap at some point if doing the swap, so that adds to the expense too.
Driving it back to back after the swap, it felt like it really picked up from about 4k onwards, suddenly felt a lot more urgent (not quite VTEC yo, but you get the idea!)
Thanks for this info. Did you get a power reading and see what gains you got at all?It's correct to say that they only do the 102 now. I am using one and currently still have a normal LS2 throttle body. Stock fuel rails worked fine with it too.
One thing you do need to do is remove the rear engine lifting eye, as the manifold fouls that. The bolts for this are a bit of a b
d to get to on our cars, and mine were done up pretty tight, so I would recommend removing that first before you touch anything else when you come to do the install.The install other than that couldn't be simpler
The stock LS2 manifold is the worst of the LS series by all accounts, so we are at least in the position to gain the most from just a manifold swap.
As far as downsides, other than the cost (I got mine second hand unused from a forum member, very lucky!) the material doesn't absorb as much noise so you get a bit more of the 'sewing machine' sound, although it's only really noticeable when you're stood in front of it with the bonnet up, and they already sound like a sewing machine anyway!
Would suggest a remap at some point if doing the swap, so that adds to the expense too.
Driving it back to back after the swap, it felt like it really picked up from about 4k onwards, suddenly felt a lot more urgent (not quite VTEC yo, but you get the idea!)
300bhp/ton said:
Have a look here:
http://www.pistonheads.com/gassing/topic.asp?h=0&a...
This is excellent info, thanks http://www.pistonheads.com/gassing/topic.asp?h=0&a...
Looks like you have an LS2 Monaro, so you should swap your heads for GM CNC ported LS3 heads before selling your LS2 heads to an LS1 owner. Then you can buy an LS3 port FAST intake. Add a street friendly cam and decent headers and you'll be kicking out plenty of emissions friendly power.
ArnieVXR said:
Looks like you have an LS2 Monaro, so you should swap your heads for GM CNC ported LS3 heads before selling your LS2 heads to an LS1 owner. Then you can buy an LS3 port FAST intake. Add a street friendly cam and decent headers and you'll be kicking out plenty of emissions friendly power.
Are these the fellas your thinking of?http://www.ebay.com.au/itm/Chev-LS3-GM-Performance...
Yanayaya said:
They're the heads I was on about. Bought mine from the U.S. for a very good price. These are excellent heads. You'll need some stock rockers (and maybe a trunnion upgrade kit).Yanayaya said:
ArnieVXR said:
Looks like you have an LS2 Monaro, so you should swap your heads for GM CNC ported LS3 heads before selling your LS2 heads to an LS1 owner. Then you can buy an LS3 port FAST intake. Add a street friendly cam and decent headers and you'll be kicking out plenty of emissions friendly power.
Are these the fellas your thinking of?http://www.ebay.com.au/itm/Chev-LS3-GM-Performance...
http://www.jegs.com/i/Chevrolet-Performance/809/19...
Edited by MyM8V8 on Thursday 27th August 16:36
MyM8V8 said:
Or for a little more money you could have LS9 CNC heads with titanium valves:
http://www.jegs.com/i/Chevrolet-Performance/809/19...
Intersting, what are the performance differences there?http://www.jegs.com/i/Chevrolet-Performance/809/19...
Edited by MyM8V8 on Thursday 27th August 16:36
Also this begs the question (forgive the ignorance lol) what is wrong with the LS2 heads? or is the upgrade suggestion simply to install a better FAST intake?
I think in general some will say the square port heads flow better than the older cathedral heads.
So if thinking of buying both heads and intake...it could make sense to change both to the newer setup at the same tme
Not sure if the square ports really do outperform the cathedrals though ?
So if thinking of buying both heads and intake...it could make sense to change both to the newer setup at the same tme
Not sure if the square ports really do outperform the cathedrals though ?
Yanayaya said:
Intersting, what are the performance differences there?
Also this begs the question (forgive the ignorance lol) what is wrong with the LS2 heads? or is the upgrade suggestion simply to install a better FAST intake?
I'm running LS2 heads on an LS1 as a small upgrade...if I had the option of LS3(+) bits I'd have gone that way...just a case of later is usually better, and OE LS3 bits are cheap for how good they are.Also this begs the question (forgive the ignorance lol) what is wrong with the LS2 heads? or is the upgrade suggestion simply to install a better FAST intake?
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