440ci! LS7! Now you're getting expensive.Originally Posted by DBTBSS
I knew someone would come back with that one! I think it would actually have to be a 15.4:1CR
I'm looking for 750 ft/lb of torque with this set-up. I want to get it real bad and I think I can with the right cam and a real good tune.
I mean, I'm making 350HP on a 5.3L with a cam and LT's. Take a 6.7L with a big ole bumpstick and all the air I can scavenge. I might make it... but, if at first you don't succeed, SUPERCHARGE!
Eric "The" Pyles
14.06 @ 96mph / 9.02 @ 79mph
302 RWHP/298 RWTQ
By the time you build that 6.7L to a high compression and NOT EVEN HAVE 650hp/tq... Take it back apart and lower the compression and add the supercharger... You could have just bought a 440 LS7 and had some money left over to put towards a tranny.
30' Ford Model A Tudor Sedan - Custom chassis - Big bore LS2 - twin B76's - Glide - 9" w/ 3.07 gears - 30" DR tire - 2k lbs cruiser
Oh, the tranny's taken care of... it's the next step (before the engine) and will be a stage 4 4L80E from FLT.By the time you build that 6.7L to a high compression and NOT EVEN HAVE 650hp/tq... Take it back apart and lower the compression and add the supercharger... You could have just bought a 440 LS7 and had some money left over to put towards a tranny.
You're right... but say I spend 11k on a LS7 instead of 9,600 on a 6.7L and make right at 700 hp but end up wanting more. Putting the SC on a LS7 would require the same amount of work and possibly more expensive parts.
It's a proccess. I'm gonna be happy with an N/A 6.7L I think... but if I'm not, there's always the next step.
Eric "The" Pyles
14.06 @ 96mph / 9.02 @ 79mph
302 RWHP/298 RWTQ
11K for a LS7?Your talking complete right? (tranny, fuel pump,etc.) 700hp is not going to be street able nor efficient, N/A w/6.7L. Plan on rebuilding that motor every year. There's no replacement for displacement. More cubes will = more hp, less stress on internals, and more HP/TQ. I would have a 402 in mine already but I saw the light and proof.
30' Ford Model A Tudor Sedan - Custom chassis - Big bore LS2 - twin B76's - Glide - 9" w/ 3.07 gears - 30" DR tire - 2k lbs cruiser
I'll get 600Hp out of the 6.7L and be happy for a bit... then when I get restless and want something to do, I'll put a supercharger on it.11K for a LS7?
Eric "The" Pyles
14.06 @ 96mph / 9.02 @ 79mph
302 RWHP/298 RWTQ
Don't be afraid to spend money on good heads. I got exactly what I paid for.
See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709
haha picky ass arent you! but yea im in complete agreement. 15.4:1 and a steady diet of 106, maybe a pill or too and you should get 700 out of a 6.7
02 Sierra... motorless for now.
02 SS.. stock bottom 4.8, 241's, 224-220/116+4, 918's and pushrods, front mount turbonetics 78mm, HKS GTII, TiAL, eBoost2, Yank PT3600, Performabuilt 60e, solid motor mounts. Tuned by me with HP Pro and LM2/AFX
Very True! Have you thought about the ported L92's, Greg? SS Killer; If I were you, with what you want to do, wouldn't even consider the 5.3L heads. With 600 HP, your biggest concern is going to be putting that to the pavement and going some where. L92's are cheap and there will be SC's that will mount on top soon with as many LS3's around now.Don't be afraid to spend money on good heads. I got exactly what I paid for.
Last edited by PurpleMinivan; 03-27-2008 at 07:13 PM.
30' Ford Model A Tudor Sedan - Custom chassis - Big bore LS2 - twin B76's - Glide - 9" w/ 3.07 gears - 30" DR tire - 2k lbs cruiser
Remember the L92 heads wont fit on a 5.3 block bore is 2 small!!!
Read it again... he's talking about a 6.0L I would hope, cause you can't bore a 5.3L to a 6.7 without paper thin walls.
30' Ford Model A Tudor Sedan - Custom chassis - Big bore LS2 - twin B76's - Glide - 9" w/ 3.07 gears - 30" DR tire - 2k lbs cruiser
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