Mr.Bu

or at least point me in the right direction? LQ4 with ls3 heads and carbed GMPP intake. Keeping it around 10.5 comp pump gas street motor that I'd like to see at least 500hp out of at the flywheel. Springs on the heads are currently good to .600 lift.

topbrent

iTrader: (1)

Many good posts on this exact subject to search.

You need to give the particulars of your combo.
Weight, trans, converter, rear gear, tire size, intended useage, ect.

As a starting point for discussion, the GMPP ASA Hot cam is easy on parts, works with your LS3 springs and will get you the HP number you are after. The ASA cam makes a genuine 525hp in the LS376/515 & CT525 crate motors on reasonably conservative tunes.
- 12480110 GMPP ASA Hot Cam Specs: .525/.525 226/236 110LSA

However quick call to one of the cam gurus for a custom cam spec'ed for your car would most likely beat the ASA cam in all areas.
EPS, PatG, Rapid Motorsports, Texas Speed, Bullet cams, cam motion.

speedtigger

iTrader: (16)

I would look at 3 pedals set up. He has a really nice looking Comp Cam 227/235 and his car makes big power. Well over 500 HP and I don't think it is too radical at all.

Mr.Bu

I've spent hours upon hours doing research as I am new to LS stuff and have probly prevented numerous threads by spending all that time reading. It just gets old reading through 15 page threads to finally find an answer, sometimes it is just easier to ask.

Maybe I missed it but haven't seen too many 500fwhp with GM's hot cam? I know CC made something like 480? Not to mention I've read that LS3's are weak on the exhaust side so why not have a cam with more lift on exh? Duration seems good though.


I asked how to get 500 flywheelhp, not how to get a certain E.T. Why do you need to know my rear gear, convertor, weight etc???

Mr.Bu

Thank you, beautiful car btw.

speedtigger

iTrader: (16)

I can speak to why the question needs to be asked. My car is a prime example. I am making over 500 at the flywheel. My cam is small (222/224 .566/.568). My car runs hard and is quick (see my signature). My car weighs 3700 with me in it, has 3.90 gears and a 3000 converter. If I go to a bigger cam, I will need more converter or it will be a pig off the line. However, if my car was lighter, I could get away with more cam. If my car was heavier, I might not go for a bigger cam unless I chose a more aggressive rear gear. People want to help you get a successful strong running combination. If you just want a horsepower figure you can brag about over a beer, that is one thing. But, if you want a car that gets it done, then you have to build a combination.

Also, if you haven't bought the GMPP intake yet, you might consider the Victor Jr.. I have read a few testimonials that say it is a faster intake than the GMPP.

Mr.Bu

I already bought the GMPP intake.

but ok for ***** and giggles, turbo400 all steel 68 chevelle 4.10 gears. Just curious, how do you figure out which convertor to choose without a hp and tq# first? Which is the reason I asked about a cam to put me in a hp neighborhood in the first place.

Mr.Bu

on a 275/60 dr, almost forgot. I've heard that carbed motors like a shorter lsa 110-112 but reading 3pedals 114 carbed combo seems to love it. Not to mention the closest comp cam specs I could find to his was this one

http://rpmspeed.com/ls1-comp-cams-ls...0c2e02d821e757

and it says it's made for cathedral port heads for a 5.3? lol Now I'm even more confused as to why it would work so good with a 6.0/l92 combo???

speedtigger

iTrader: (16)

I think it is still true that they like the narrower lobe centers compared to long runner EFI engines, but that does not mean that it won't run on 114 or even 116 for that matter. It just means it might run a little faster on 112 or 110. There is also another general rule to throw into the mix. Stick shift cars will prefer a wider LSA compared to an automatic. 3Pedals, well has 3 pedals LOL.

As far as which converter without knowing horsepower and torque, I guess a lot of us consider them all simultaneously on a new build. Do you have performance goals such as quarter mile times or such?

One other thing, 3Pedals cam has over .600" lift. But, Lunati has a cam that is 227/233 on 113 with .588 lift. You could ask them to grind that on 110 LSA for you. I am thinking that cam would be great with a 3,500-4,000 stall. Or you could step up to their 232/238 with .600" lift and go with a 4,000-4,500 stall converter. Either of those set up should get you low 11s.

Mr.Bu

As long as it runs around mid 11's, pump gas 93ocatane, and can go for 4 hour cruises any day of the week without problems, I'm happy.

Hate to bug you but can't find either of those cams on lunatis website?

http://www.lunatipower.com/Category.aspx?id=60

speedtigger

iTrader: (16)

The times you see in my signature are with CNC ported LS6 heads which will flow similar to your L92s. I have a very small cam (222/224 .566/.568 on 112) and a 3000 converter. You car should weigh about the same as mine I would think (3500). I would bet that 227/233 with a >3500 converter will at least run 3 tenths faster.

I drive my car 4 to 5 times per week and today I drove 140 miles round trip to Bradenton Motorsports and ran five 11 second passes. Does that qualify? Of course I have overdrive so that made it nice.