ls2 intake on a ls1
ls2 intake on a ls1 ok I have an extra ls2 intake from my gto laying around. I'm putting a cam and bolt ons on my friends SS while he is gone on deployment. He was wanting a LS6 intake for it. I got to thinking to my knowledge a LS2 intake is basically a LS6 intake with a 90mm opening, correct? So it will fit a ls1 right? I just wanted to make sure the LS2 didn't need a wider intake due to different deck height and such. like the ford 302, 351. I'm 99% sure it will fit but just wanted to make sure. yes I know the map sensor is on the front of ls2 intake
i would check myself but the heads aren't back on the motor yet.
i would check myself but the heads aren't back on the motor yet.
Last edited by lt1formula2000; Oct 23, 2007 at 08:33 AM.
I believe the Ls6 flows a little better anyway.
Don't think its worth the install, unless you port the Ls2.
A friend of mine and a member of the forum MattD has this set up and had it ported.
Don't think its worth the install, unless you port the Ls2.
A friend of mine and a member of the forum MattD has this set up and had it ported.
well it's going on a 98 car so it should be a step up from the ls1 intake on it. plus I it's free. My friend plans to go with a FAST 90 in the future just not know. this way he will already have a 90mm throttle body.
u can get different fuel rails like fast rails and a few others, if u use the ls2 fuel rail and the ls1 injectors, u have to put spacers and longer bolts between the intake and fuel rail. if u use the ls2 injecters, u have to change the injector pigtails or buy the ktech adaptor harness. on my friends l92 H/c setup, i went to the hardware store and bought brass pipe(can't remember the size) and used throttle body bolts cuz they're longer. i'm pretty sure k-tech sells the injector o rings and the spacers in a kit. also u have to mode the throttle bracket depending on which TB you buy
i only seen one test and it was on a 98 car with a small cam/stock heads. with heads and a bigger cam and ls2 intake is a cheaper fast 90/90
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Verdad Gallardo This may be a dumb question but, do any sponsers sell stock LS2 intakes and throttle bodies? I checked some with no luck. I am considering going with a ported LS2 setup instead of the fast 90/90, anybody done this? Or is it worth it to pay up the the fast?
lsx performance parts sells them!!!!!! check out my sig
Don't do it! I have a Hot Rod mag where they tested four intakes on a truck 6.0. The truck manifold flowed better than the LS2. They lost 9hp when they changed to the LS2. They gained when they went with the LS6. The stock LS1 manifold flows better than the LS2, supposedly because they changed the way they molded it for lower production costs.
Ray
Ray
Basically, the LS2 intake is just the LS1 intake with a bigger snout. No difference in HP. Waste of time. Pay attention and read around some before you guys chime in that it's a great idea. This has been common knowledge for months.
On The Tree
Joined: Aug 2007
Posts: 125
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I agree. Notice how no one does this swap? If it were as good as an LS6 or even more unimaginable a FAST, then why wouldn't anyone be doing this? That would also mean that FAST would stop selling their piece for 750 bucks because GM makes a totally cheaper version of the same thing all original. Yeah, it doesn't make since at all. I wouldn't do anything til' I got some solid flow charts for that intake, and even then, I would probably still port the crap out of it. If it's 275CFM or better then it's probably worth your time.
A ported Fast only flows 278cfm with a 330cfm head attached. As for the LS2 being junk, not so. Matt D has a ported one on his SI car and it does quite well. The problem with an out of the box LS2, wich is maybe 5rwhp less than a LS6 is the runner openings protrude into the air stream and where the runners meet the heads there is a large restriction that needs to be ported. There is a great article on TPIS's website about intake testing. As hot the Hot Rod article it's all messed up, do you really thing a 6.0L truck manifold outflows a LS6? Check out LS2portworks page or talk to Vengence. The LS2 is not junk.
Thanks for the good info. Looks like it will be the LS6 of fast.
Last edited by ONEBADWS6; Oct 25, 2007 at 02:59 PM.
Ha, I love it when you tell about your experience with something and people just ignore you and listen to the people with no experience at all. Then again, all of this information is already available (and more) just by doing a search.
Jon
Jon
Yeah because I don't know how to make power with a LS1 right lol.