LSXS10

iTrader: (37)

Ok guys, here goes. Ive talked to 3 people and gave them the exact same specs and Got three wayyyy differnt cam specs. Here are the specs and what i intend to do..
Iron block 4.030 bore
Eagle 4.00 crank
Bme aluminum 6.100 rods
Wiesco K464f3 L92 "-3cc small dome"
comp. is going to be 11.3:1
Ported L92 heads milled .020
GMPP carb intake
950 HP carb
1 7/8 long tubes
Powerglide
9.5' conv. stalls close to 4000
4.10 gear
275 drag radial
3300# race #
This will be an N2O motor with "2" .053 jets. It is for a heads up radial tire class. I am not concerned with street manners. I just need a all out cam, ET. is my only goal. The only thing i want to do is stay at .625 lift or less. All i have left to buy for this motor is cam and valvetrain. What do you guys think? stay with the small dur. or get wild with it, One company told me a 260 /268@ 50 with a 114ls. I just think that is to much for the l92 heads. Is there anyone running a combo close to this that is making power? if so let me know. Thanks, Heath...

toneloc60

iTrader: (7)

please do a search on spec'ing cams. It always gets ugly.

ZFSix

iTrader: (14)

No reason why it should get ugly. This is an open forum and he's asking for help on his specific combo. Why would it get ugly?

edcmat-l1

iTrader: (10)

If you keep it mild, it'll be a dog.
With that intake, and those heads, on a smaller motor, you need to wing that thing to make any power.
Solid roller 625/625 248/254 on a 112+2. That would get you close.
And spin the **** out of it.
If you really wanted to make some power, up the compression, and run more cam.
This is a totally different set up than a L76 intake, and shouldnt be treated or cammed like one.
If you want a mild cammed, street freindly set up, ditch the intake and carb and go EFI with a L76. Otherwise, with what you got, cammin it like one wont do anything but make it a dog.

Ryne @ CMS

iTrader: (10)

great advice

edcmat-l1

iTrader: (10)

Thanks Ryne.
And holy ****, I just noticed its an aluminum rod motor. If you dont set that thing up to spin 8000 rpm, you've pissed away money on the rods.

toneloc60

iTrader: (7)

The reason I said it gets ugly is that there are a lot of people who think they know what's best and just start spitting out cam specs. When, in truth, every engine is different and every combo needs something suited to it.

The best thing anyone building an engine can do is call an engine designer and get a custom grind for their setup. My custom grind only cost about $30 more than an off the shelf cam. Call Crane, Comp, Isky, Lunati or any good builder. I've heard Patrick G knows what he's doing. I've also heard some good things about Speedinc's custom grinds.

LSXS10

iTrader: (37)

Here is the deal. I did a search on this and read for about 2 days. Most all of these were for dd cars or they were worried about street manners, As i said before im lookin to get all i can out of this combo. its not a driver at all the most i may have to do is a 30 mile cruise for a street legal class or the LSX cruise in a couple months. I do think a smallish cam will hurt the perfomance but the 260/268 just seems a little iffie. I have been thinking about a 248/260@50 625/625 on a 112ls HR. I think it does need alot of split for the amount of n2o im using and the best i can tell they dont need as much ls as a cathedral head. Does anyone know who can hit this cam the first time? I dont have the time or money to do cam after cam swaps. I see alot of these guys spinning these motors to 7500 without issue with HR cams Do you think it needs to be a solid? Most of what i have read leads me to beleive that a solid is not needed. My goal is to put 700-800 to the wheels thru the powerglide and 9inch and this is on roughly a 300 shot. Help me out guys , who do i need to talk to???

00cls1camaross

iTrader: (10)

patrick g or predator z both spec cams....

toneloc60

iTrader: (7)

Here's my combo and cam specs. It made 743.8 hp and 634 tq at the flywheel NA at 6700. It is also built for N2O but I haven't got the car all the way together and have no nitrous system for it yet. Hopefully this will give you an idea of what you'll need to reach your goals. I just don't know how much help it'll be with us running different heads.

My guess, however, is 1 7/8 headers aren't going to give you quite enough flow for your goals on N2O. And, it looks like you're shooting a little high on the CFM for the carb. At 6900 mine was only drawing 827 CFM. Yours will be less at the same RPM due to you having less cubes.

LSX 441ci 11:1 cr
6.125" Lunati Pro Billet Rods
4.125" Compstar Callies crank
4.125" custom Wiseco pistons for nitrous
Meziere street version w/p
LS7 heads ported and polished with Del West Ti intake and sodium filled exhaust valves
LS7 carb intake
950 Quick Fuel Technologies carb modified for E85
MSD coils and wires
Harland Sharp custom made roller tip rockers (still 1.8:1)
Melling high pressure and high volume oil pump
Kook's 2" primary headers w/LS7 flange and 3 1/2 collectors
MSD ingnition controller for LS2
Cloyes double roller timing set
Custom Comp Cam: (Everything is based on 1.7:1 rockers, I have 1.8:1)
Gross valve lift Intake .623 Exhaust .623
Duration Intake 254 Exhaust 266
112 Intake center line
114 lobe separation

Here's a link to the dyno sheet: https://ls1tech.com/forums/attachmen...2&d=1215064534

NemeSS

iTrader: (127)

Contact Pat G with all your specs.
he will set you up right, for 30$ he will spec a cam to suit your needs.
the cam is then ground by CC thru TR

LSXS10

iTrader: (37)

That is a very stout combo

The 950 is going to be a lil much but i already have it and a 750. I will probly get another carb after i get it up and going may even crank it on the 750. I am also runnin a 6010 that i forgot to mention. Who did your cam? Sounds like they did a good job..

LSXS10

iTrader: (37)

Do you have a # to contact him at??? He works at TR i assume??

Patrick G

iTrader: (14)

I am a consultant for Thunder Racing. If you'd like me to spec you a custom cam, just click the cam help link in my signature and follow the instructions.

toneloc60

iTrader: (7)

An engine designer at Comp did it.

3timeracin

iTrader: (15)

I dont work for comp or thunder but did work for west tech and tested about 800+ engines in the last 3 years. I am tesing on my own now and have been getting deep on the l92 stuff with 4 cars going now. tuning has been a nightmare as I am not a great tuner.

I would try something like this 240/252 on a 112 installed on a 108ic

when you are done paying to get some other recomendations lets see how close I am ?

I KNOW OF 3 CARS RUNNING THIS CAM 246/260 111LS WITH 416 AND RUNNING HIGH NINES NA AT 3200LBS AND 4.11 GEARS ?

LSXS10

iTrader: (37)

That is who told me the 260/268 114ls cam. I just have to ???? it.

LSXS10

iTrader: (37)

How many of the L92 cams have you done that are not for a dd. What kind if results and numbers have they produced?

9secondsflat

how long will those rods last before you get some stretch?

LSXS10

iTrader: (37)

We have run these rods all over the street and been 3+ seasons with them and no problems That is a BME rod , i dont know on any others....