Interesting to see so many stock cube guys running such large cams...Mine is not an "off-the-shelf" which is good since the car itself isn't being built that way.
EDC 231/242 .6307"/.6222" 114*LSA 111*ICL

 

PLEASE TELL ME THAT YOU CAN NOT FIT THAT IN A STOCK CUBE ENGINE

 

Thats the cam in my 408 Motor, in my stock cube 346 I have this cam:

FMS 255/261 .731/.738 108 LSA

I went 10.11 NA with my 346 motor and I run 9.6x NA with my 408.

Interesting comparison:

MOTOR: FMS 346cid LS1 (Stock LS1 Block)
RWHP: 485ish
BEST ET: 10.11 @ 133 MPH
RACE WEIGHT: 3250

Same car..

MOTOR: FMS 408cid LS1 (Stock 6.0 Iron Block)
RWHP: 585ish
BEST ET: 9.68 @ 139 MPH
RACE WEIGHT: 3350

With the 408 the car is 100# heavier also, its a no brainer the 408 is MORE FUN!!

Right now I'm beginning another FMS motor project, I'll post more when I get some decisions finalized.

Lee

 

The question is why would you want to. You'd have to run 15 to 1 compression and about 9000 rpm or so with that cam for it to work in a 346/347. That and you would have to have super huge valve reliefs. Of course you would already have them I guess because of the 9000rpm short block you would have to assemble for this to work. Please post your results if you do this, should be real funny.

 

FEAR THE LS1, are you using Meaux heads? Also, are you using an lsx style intake, sheet metal, or single plain. Also, what tb?

 

can someone tell me which is easier on valves/springs the F13 with the 112 or the 114 and why thanks
jason

 

On the 346, I have:

FAST LSX 90mm intake, FAST 90mm TB
FMS/Meaux Heads, they are LS6 heads with 2.055/1.60 valves
I used K-motion double springs and T&D shaft rockers
I shift the motor at 7400 rpm and trap at 7400
Drive train is a TH400 with a TCI 5k Stall, Moser 12 bolt and 4.56 Gears, MT 30x10.5x15 Tires

Everything on my current setup is exactly the same except I changed the short block to a 408 iron block with a bigger cam. I still use the same intake/heads/valve train/drive train etc.. I did have TCI tighten the converter and I also put in bigger valves for the 408 2.08 valves now.

I will be going to a sheetmetal intake on my next motor, I believe as does Allan that my current 408 can't get enought air through the LSX90.

 

Thunder TR236 comes to mind as being pretty large..

TR236
236/230 .599/.573 112 lsa

 

I thought the G5X3 was .600/.600? That's how it was listed in one of the offices..but on the duration it said "Perfect"..so who knows..

 

Cool deal. I sold my fast 90 combo, I meant returned, for a single plain gmpp which I will use a 4 barrel tb with because the lsx style manifolds don't hold air flow at higher valve lifts .600" and up. I bet you will fly with that change (sheetmetal intake I mean).

 

I had and just sold a custom Cam Motion Hyd. Cam 243/250 .598 602 on a 114 or somthing liek that .

 

dude post a sound clip!
I can't even begin to imagine how hard that must sound in real life

 

Alright guys need help, buying a 99 trans am and trying to figure out how much power this set up would have. Guy saids 430 to 450 to the wheels on a mail order tune... It's a stock lq4 with prc stage 2.5 heads Vic jr intake with 43lbs injectors and nick Williams throttle body t56 new ls6 clutch and McLeod flywheel, the cam is a 323/234 598/598 on a 110lsa and the mail in tune. Do you think it actually has 450 ish to the wheels? And capable of more with a dyno tune? Thanks

 

You DO realize you are posting on a 12-year-old thread??

 

I realized after I posted it haha

 

This thread is so old that cam technology has actually changed since then lol. I know its an honest mistake, just giving you a hard time Dbar34 lol

 

Ya never know, someone might still help you...

 

I know right lol, yeah hci is already helping me on a different thread

 

Good, that is what these forums are all about! ;-)

 

here's for another oldie-bump:
BTR 231/248 .617"/.595" 120°+5 in my LS1