goshawk23

ok, i know a while back there was a post about all the intakes going head to head. truck, ls1, ls6 and fast. i think they finished in that order.

i know the ls1 intake isn't as good as the ls6 but they are cheap and can be had at any moment.

why are they so bad for the truck motors. i do understand the bottom end torque isn't going to be there with normal everyday driving. but with a 3200 stall that stalls higher than rated and a rear end with 4.10 gears, i don't see how it would hurt you at the track or when you are racing. when you launch on that stall and gear ratio you are in the middle of the powerband. i'm not talking about towing and all that where you need the tq really low. just at the track. wouldn't this intake be better for track use than the truck intake? dyno sheets i have looked at seem as though the truck intake starts falling off at 350 hp. shouldn't this intake help get the same trucks upwards or 375 or more? lets discuss..

Sport Side

iTrader: (6)

I was actually thinking of trying the same thing for a couple of reasons.

1.I've seen quite a few setups peaking @ 5500-rpm w/ the truck intake and I'm certain that the LS1 can create a 6000-rpm peak.

2. It's cheap and a step towards the LS6/FAST swap I'll later on make.

3. Should be a fairly easy swap, especially with the earlier, non-electric controlled throttle-bodies.

4. It'll be interesting??? LOL

goshawk23

i keep talking this over with a few other members on here and we can't come up with a single reason not to do it or why it won't work. i know yelo has it or has had it on an engine. he did say the bottom end was down on tq. which to me is ok cause i know i have traction problems now. a little less tq might not be so bad. plus if it flows past the truck intake then it should pick way up when the truck intake is falling off. but with gears and a stall what you lose on the normal drive shouldn't be that bad at the track especially when you rev to 6500 rpm or more.

Sport Side

iTrader: (6)

RPM is power 'if' you are capable of making it. In this case, I'd think so.
I agree too. If you have the typical 4.10 gear/3000+tc setup, a 10/15tq hit below 3000-rpm wont kill your 60'.
Just guessing however. Results will tell the truth.

bluecajun5.3

iTrader: (31)

if you think about it, for all the money your going to spend to relocate everything and fabing up stuff to make it work, i don't think it's worth it for the gains to be made out of it. thats what is holding me back from the swap. not worried about lowend b/c i have more than enough already. hopefully someone comes out with a manifold/tb combo that works well with these 5.3 that's a direct swap... just my $.02...

goshawk23

agreed. if it cost 300 bucks or more to do the swap then to me it isn't worth it.

BenKey

iTrader: (1)

Not sure on the cable throttle versions, but I would rather go with the vette LS2. It's a 90mm setup and use the stock 90mm tb with it. The LS2 didn't do so well compared to the LS6, but I think better than the LS1 and it has the 90 inlet. Maybe I'm wrong here?

mattrem

iTrader: (7)

I hope to have some answers soon, I have the 78mm FAST sitting here waiting to be installed. Just working on a few other things also.

I did it cause its the last thing for the motor for the me, after this I am done.
Me and Kano made the same power with the same heads and a dfferent cam.

moregrip

iTrader: (8)

Richard from WCCH did some flow testing on a stock truck manifold, he can shed some light on this discussion

mattrem

iTrader: (7)

I think some of the lowend loss was from runner length, but the runners are 262mm on the truck and 263mm on the LS6.