bifster

I currently have an LS6 intake is there any benefit to going to the ls2 intake other than the bigger 90mm tb? Is there a huge difference for the 800 dollar difference between the fast and the ls2?

c0ncEpT

iTrader: (4)

You cannot run an LS2 intake on an LS1. Thats the difference

bifster

with the addition of ls2 heads you can... correct?

and if ls2 heads are the same as ls6 heads whats the difference

SweetS10V8

iTrader: (4)

100% incorrect. You can run an LS2 intake on an LS1, you just need a 90mm throttle body.

Anyways the LS2 is a downgrade from your LS6, The FAST would be an upgrade. Your in the middle right now.

Yes!!

c0ncEpT

iTrader: (4)

Yeah my bad I was thinking LS7 intake for some reason.

Johnnystock

iTrader: (6)

100% correct

Johnnystock

iTrader: (6)

you need injectors adapters to run the LS2 and a ported version of the LS2 could be superior to the LS6 but not many proof lying around. The best thing that could happened to us LS1 guys is a 92mm LS6...wont happen

massls1guy

iTrader: (9)

The OP has an LS1 engine from a 2002 Z28. He says the engine has no mods. The fast intake won't give you a good gain. Don't put on a fast until you at least have all the bolt on mods and a cam.

And FYI, Sweet's dyno graph is a 6.0 LS engine, not a 5.7 like the LS1. His dyno graph is comparing the LS2 and the fast. So you probably won't see gains like his if you swap your LS6 for a fast, especially with your current mods.

SweetS10V8

iTrader: (4)

I think I personally went over that when I explained to him.
Then I specifically re-quoted, just so there was no confusion, "Is the FAST worth $800 over the LS2 intake." And I posted a dyno of an LS2 intake vs a FAST intake. Thats what he asked for!

Power gains are relative too, you seem to imagine there is a huge difference between a 5.7L and 6.0L. Its not really that different. If a 6.0L picks up 21hp, a 5.7 would most likely gain 17hp (ish).

I post to help people with their questions, even if they are the samequestions...over..and over...and over again. And everytime its a FAST LSX related question I always wonder how long it will be until you see it and again try to discredit good data.

massls1guy

iTrader: (9)

I disagree about that gain on a stock LS1. And you're missing the point. Your engine is different than these LS1 guys in several ways:
- displacement (as you said)
- stock intake manifold
- cylinder heads (241 vs LQ9 -> 243 ports with a bigger chamber)

So it's not really comparing apples to apples.

And bolting a fast intake onto a stock 2002 LS1 doesn't give much gain at all.


You present the data as if it is relevant to the LS1. I don't think it is.

If someone asks if bolting a fast onto a stock LQ9 will give a good gain you have the perfect data for them.

teke184

iTrader: (5)

got a dyno graph go show it?
track times?

while i don't think there are huge gains to be had, i think it will still make power.
and whether its worth the added cost is TOTALLY up to the buyer.

if he's planning cam or h/c down the road, and wants to tinker with the engine as it is now...why not get the fast.


i say do it....and post dyno results

massls1guy

iTrader: (9)

No, no.
But from reading a lot of posts I think the gains will be pretty small.

As you know the 2002 has an LS6 intake from the factory. The fast will probably gain a few HP in the upper RPM, might lose a few at other RPM.

I agree completely.

What mods to get is a personal choice of course, different for everyone. Getting a fast as the 1st mod on a stock LS1 engine isn't a great choice if you want to see gains before you upgrade H/C. If anyone just wants to tinker or even just likes the look of it that's cool, get the fast.

To the OP I say don't do it until you have all the bolt on's and a cam and/or heads.

bifster

wow yah ok guys haha didnt want to start a fight!! thanks for the input i do understand 317 heads are identical to 243's with added chamber volume thats is the reason i have a set for my ls1. anyways thanks for the info basically i wont bother getting an intake till its actually my limiting problem as i know the ls6 intake is a well manufactured piece. thanks again!