FMS LT1 Results
Originally Posted by Elysian
Convert some 12 or 15 degree gen 1 cylinder heads over to reverse cooling. Get a custom intake. You could easily hit 500rwhp NA. It's all in the heads.
Launching!
Joined: Jul 2003
Posts: 204
Likes: 0
From: MI
There is some welding involved, drilling some new coolant passages, etc. It has been done before and I'm sure some of the better race shops could fix you up (LS1speed, APE, More Performance, etc). As far as price, I wouldn't want to say. You figure you'll have the price of the bare heads (which are substantially cheaper for SBCI than for SBC II or III). You'll have the price you would pay for porting them anyway. On top of that, you'll have whatever the price of converting them would be. DART, Trickflow, etc, makes some SBCI street heads that flow 325cfm @ 0.600 right out of the box. You could probably get another 20-30cfm with a full hand port and 5-angle valve job. For an all out performance motor, it seems like it would be worth it.
Thread Starter
On The Tree
iTrader: (1)
Joined: Mar 2004
Posts: 115
Likes: 0
From: Futral Motorsports
Well seeing how your on this subject about old school heads i have a set of PRO-ACTION 220s for sell bare out the box 64cc,flow around 275 out the box(will flow just to see)and have not been converted yet! 850.00 plus shipping and will convert for x-amount of dollars!You can reply here or e-mail me at telly@futralmotorsports.com, THANKS TELLY
Thread Starter
On The Tree
iTrader: (1)
Joined: Mar 2004
Posts: 115
Likes: 0
From: Futral Motorsports
Originally Posted by Gripenfelter
I put out 426rwhp with a LE2 (Joe O.) cam and Lloyd Elliott heads. 
I'll post a video next month when I get a better tune.
I'll post a video next month when I get a better tune.
With what kind of setup!
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Originally Posted by Gripenfelter
I put out 426rwhp with a LE2 (Joe O.) cam and Lloyd Elliott heads.
I'll post a video next month when I get a better tune.
I'll post a video next month when I get a better tune.
Why ain't you over on the Speed Density board more often???
TECH Resident
Joined: Jun 2004
Posts: 840
Likes: 0
Originally Posted by Elysian
Convert some 12 or 15 degree gen 1 cylinder heads over to reverse cooling. Get a custom intake. You could easily hit 500rwhp NA. It's all in the heads.
Just get these and nip at the heels of their flow without radical mods to fit. Well you'd just need to do a raised runner intake and I'm sure TPIS can do it.
http://www.airflowresearch.com/pages/215sbc_rr_lt1.htm
I have seen 525 at the crank with just ported stock heads and a tame (for a stroker) 225 at .050 cam..... and a TPIS intake mani...
I don't know that it is that hard of a goal to hit to justify going to 12, 15 or 18 degree heads and the increased expense they bring not including the modification....
Now those ARAO 32valve heads moded to fit an LT1 would be a sight to see....
Launching!
Joined: Jul 2003
Posts: 204
Likes: 0
From: MI
Originally Posted by V8_DSM_V8again
I have seen 525 at the crank with just ported stock heads and a tame (for a stroker) 225 at .050 cam..... and a TPIS intake mani...
I don't know that it is that hard of a goal to hit to justify going to 12, 15 or 18 degree heads and the increased expense they bring not including the modification....
I don't know that it is that hard of a goal to hit to justify going to 12, 15 or 18 degree heads and the increased expense they bring not including the modification....
On The Tree
Joined: Jan 2004
Posts: 188
Likes: 0
From: Houston/ Austin, TX
Big Cube LT1 + SBC heads + Single plane intake + carb = 
LS1 dominates LT1 for the most part on the street, but when you get good head work done on an LT1, then it levels the playing field ALOT.
LS1 dominates LT1 for the most part on the street, but when you get good head work done on an LT1, then it levels the playing field ALOT.
Sorry I never responded back to this thread.
The dyno I was using apparently wasn't calibrated so it didn't put out 426rwhp. I made a second run a few days later and it said 326rwhp LOL. So I guess they're having some issues with their dyno lol.
I have a 383 with Long Tube headers, 3200 stall, and true duals. I jumped on a superflow dyno recently and made 390rwhp with a bad opti. The dyno guys said if it weren't for the dip in the graph caused by the opti the numbers would have been somewhere north of 400rwhp. Not bad for an automatic with a 3200 stall.
I recently ran 12.11@116mph with a 1.868 60 foot. It was raining and I was running rich.
http://members.shaw.ca/daddyc00l/gimli.wmv
http://members.shaw.ca/lt1z28/Gripslip1.jpg (results printed one on top of the other...idiots)
The dyno I was using apparently wasn't calibrated so it didn't put out 426rwhp. I made a second run a few days later and it said 326rwhp LOL. So I guess they're having some issues with their dyno lol.
I have a 383 with Long Tube headers, 3200 stall, and true duals. I jumped on a superflow dyno recently and made 390rwhp with a bad opti. The dyno guys said if it weren't for the dip in the graph caused by the opti the numbers would have been somewhere north of 400rwhp. Not bad for an automatic with a 3200 stall.
I recently ran 12.11@116mph with a 1.868 60 foot. It was raining and I was running rich.
http://members.shaw.ca/daddyc00l/gimli.wmv
http://members.shaw.ca/lt1z28/Gripslip1.jpg (results printed one on top of the other...idiots)
Originally Posted by Gripenfelter
Sorry I never responded back to this thread.
The dyno I was using apparently wasn't calibrated so it didn't put out 426rwhp. I made a second run a few days later and it said 326rwhp LOL. So I guess they're having some issues with their dyno lol.
I have a 383 with Long Tube headers, 3200 stall, and true duals. I jumped on a superflow dyno recently and made 390rwhp with a bad opti. The dyno guys said if it weren't for the dip in the graph caused by the opti the numbers would have been somewhere north of 400rwhp. Not bad for an automatic with a 3200 stall.
I recently ran 12.11@116mph with a 1.868 60 foot. It was raining and I was running rich.
http://members.shaw.ca/daddyc00l/gimli.wmv
http://members.shaw.ca/lt1z28/Gripslip1.jpg (results printed one on top of the other...idiots)
The dyno I was using apparently wasn't calibrated so it didn't put out 426rwhp. I made a second run a few days later and it said 326rwhp LOL. So I guess they're having some issues with their dyno lol.
I have a 383 with Long Tube headers, 3200 stall, and true duals. I jumped on a superflow dyno recently and made 390rwhp with a bad opti. The dyno guys said if it weren't for the dip in the graph caused by the opti the numbers would have been somewhere north of 400rwhp. Not bad for an automatic with a 3200 stall.
I recently ran 12.11@116mph with a 1.868 60 foot. It was raining and I was running rich.
http://members.shaw.ca/daddyc00l/gimli.wmv
http://members.shaw.ca/lt1z28/Gripslip1.jpg (results printed one on top of the other...idiots)
Teching In
Joined: Dec 2002
Posts: 22
Likes: 0
From: Oklahoma
could I use the same cam as telly without having my heads ported right now?
I plan to get them ported this winter or maybe sooner I have an extra set soon so i'll be able to have the stock ones on while I have the other set ported so I was wondering if it will make decent power with just this godzilla cam and no headwork yet...
thanks, Zac
I plan to get them ported this winter or maybe sooner I have an extra set soon so i'll be able to have the stock ones on while I have the other set ported so I was wondering if it will make decent power with just this godzilla cam and no headwork yet...
thanks, Zac
Originally Posted by Elysian
With a stroker all bets are off. I'm sure with a 396, a decent cam and some tuning, 500rwhp is cake. I was interested in hitting 500+rwhp with a stock cubic inch motor. At most, a rebuild (355).
In your opinion, can it be done with a hydraulic roller cam? I have heard of several instances of 383 and 396 strokers with 500 RWHP with solid roller setups, but I haven't seen anyone above 470 RWHP using a hydraulic roller cam. Seems you would need to spin the engine well beyond the valve float threshold to get those numbers. Any thoughts?
Launching!
Joined: Jul 2003
Posts: 204
Likes: 0
From: MI
Originally Posted by METALBEAST
In your opinion, can it be done with a hydraulic roller cam? I have heard of several instances of 383 and 396 strokers with 500 RWHP with solid roller setups, but I haven't seen anyone above 470 RWHP using a hydraulic roller cam. Seems you would need to spin the engine well beyond the valve float threshold to get those numbers. Any thoughts?
TECH Fanatic
Joined: Oct 2003
Posts: 1,101
Likes: 0
bring up an old post but i forgot to post my times and dyno number.
ran a 11.72 @ 117.5 and dynoed 396 and 365 torque... with my car missing right at the peak hp so im sure it would of made over 400
i only made it out to the track once before i fried my clutch so im sure theirs more in it.
thats up from my 388 and 356 torque of the 306 cam. my best was an 11.82 @ 115 with it.
now if i could just figure out why my car misses.
ran a 11.72 @ 117.5 and dynoed 396 and 365 torque... with my car missing right at the peak hp so im sure it would of made over 400
i only made it out to the track once before i fried my clutch so im sure theirs more in it.
thats up from my 388 and 356 torque of the 306 cam. my best was an 11.82 @ 115 with it.
now if i could just figure out why my car misses.
Teching In
Joined: Dec 2002
Posts: 22
Likes: 0
From: Oklahoma
Originally Posted by blkchevyz
bring up an old post but i forgot to post my times and dyno number.
ran a 11.72 @ 117.5 and dynoed 396 and 365 torque... with my car missing right at the peak hp so im sure it would of made over 400
i only made it out to the track once before i fried my clutch so im sure theirs more in it.
thats up from my 388 and 356 torque of the 306 cam. my best was an 11.82 @ 115 with it.
now if i could just figure out why my car misses.
ran a 11.72 @ 117.5 and dynoed 396 and 365 torque... with my car missing right at the peak hp so im sure it would of made over 400
i only made it out to the track once before i fried my clutch so im sure theirs more in it.
thats up from my 388 and 356 torque of the 306 cam. my best was an 11.82 @ 115 with it.
now if i could just figure out why my car misses.
