Seeking Some Intake Insight
Seeking Some Intake Insight So I bought an LQ4 off a buddy and I'm stuck trying to figure out a good intake for my engine. I'm guessing the truck intake may be a little restrictive up top, however this engine will mainly be on the street and I may end up liking the down low torque output. I'm basically shooting for a well rounded engine and looking for around 430-450 at the flywheel. Would an LS1 intake offer much improvement? There seem to be some decent deals on these.
Engine build so far:
228r cam, Comp 918 springs
LQ9 pistons with LS2 rods
LS2 timing chain
Stock 317 heads with 3 angle valve job
Will likely be running shorty 1-5/8" headers
Engine build so far:
228r cam, Comp 918 springs
LQ9 pistons with LS2 rods
LS2 timing chain
Stock 317 heads with 3 angle valve job
Will likely be running shorty 1-5/8" headers
Last edited by Triaxle; Mar 14, 2010 at 06:35 PM.
first off, what vehicle is it going in? the truck intake wont fit under the F-body cowl. im sure you could modify the cowl to fit, but in the end it wouldnt be worth it. plus it looks hideious.
an LS1 intake would be a step in the wrong direction. switching from the truck intake to an LS1 intake will do nothing but take away from your low end torque. i suggest an LS6 intake or if you have the money a FAST 102. also, remember, a car intake, (LS1, LS6 FAST...etc wont fit with truck front accessories. the idler pulley or tensioner, (i cant remember which) will be in the way of the TB.
an LS1 intake would be a step in the wrong direction. switching from the truck intake to an LS1 intake will do nothing but take away from your low end torque. i suggest an LS6 intake or if you have the money a FAST 102. also, remember, a car intake, (LS1, LS6 FAST...etc wont fit with truck front accessories. the idler pulley or tensioner, (i cant remember which) will be in the way of the TB.
The engine is going in a custom project so the intake size isn't too important. I was unaware of the differences in accessories, but I'm guessing a car accessory kit would bolt right on? The Fast intakes seem pretty nice like you said, but they're a little more than I want to spend at this time. I assume an LS6 intake would give up some down low as well but, would be a nice gain overall? And would the LS6 intake fit my truck throttle body?
IIRC the "lose torque down low" is more myth than truth unless you mean idle to 2500rpm or so
get a ls6 intake and car accessories or the kit to reroute the belt to get it out of the way, check out the hybrid section here for more info and details
get a ls6 intake and car accessories or the kit to reroute the belt to get it out of the way, check out the hybrid section here for more info and details
Yea I was afraid the truck intake was gonna run out of breath before my cam can peak. I'm thinking 430-450 horse is probably out of reach for me right now but an intake upgrade is an easy mod down the road. Thanks for the replies
acually, dyno tests have shown the truck intake to peak higher than the LS1 intake because of the longer runners and more plenum volume. IMO, the LS6 intake is the best of both worlds. if your running a cam that doesnt peak till after 6k rpm's, the LS6 intake will be a restriction.
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acually, dyno tests have shown the truck intake to peak higher than the LS1 intake because of the longer runners and more plenum volume. IMO, the LS6 intake is the best of both worlds. if your running a cam that doesnt peak till after 6k rpm's, the LS6 intake will be a restriction.
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Verdad Gallardo ill have to do some searching. i think it was in an article of GMHTP...
anyways, i have an MS4 that peaks at 6500 and still pulls hard to 7200, but the LS6 intake i had was choking it pretty good after 6k.
anyways, i have an MS4 that peaks at 6500 and still pulls hard to 7200, but the LS6 intake i had was choking it pretty good after 6k.
Alright I found some good info on the different intakes. You were right on about the ls1 vs truck manifold, but the truck manifold does level off around 5,000 rpm. So will my 6000+ rpm peaking cam just be choked with this intake, or might it help compensate for the intake at high rpm?
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I have it on my 408 stroker in my 04 GTO...it will not clear the hood on the GT0 without a scoop, and will not clear the cowl on an F-body without notching. It seems to have really tamed down my cam at and around idle (238/242 .595/.595 112lsa) idles great at 950 rpms.
I have hptuners and have been street tuning it sofar so no dyno numbers or track times yet. Weather and work permiting I hope to hit the track this weekend coming up
Overal I like it, but during the build I did hog the runners out to match my ported heads.
Also new its about the same price as a used ls6 intake
I have hptuners and have been street tuning it sofar so no dyno numbers or track times yet. Weather and work permiting I hope to hit the track this weekend coming up
Overal I like it, but during the build I did hog the runners out to match my ported heads.
Also new its about the same price as a used ls6 intake