Jdawson38995

There are no Dynos within 100 miles of me...so does anyone know about what output this setup should make.....

Bored to 355
Cc503 cam
1.5rrs
Flow master cat back
Kn cold air intake
3k stall
Programmed computer

NewOrleansLT1

335rwhp MAX

VAformula

iTrader: (8)

320- 330 rwhp sounds reasonable

nitrous2fast

iTrader: (2)

300 hp??

bufmatmuslepants

iTrader: (3)

Who did your "programmed computer", and what's your compression ratio? That chokemaster catback and stock manifolds is costing you a bit. I guess 300 if its tuned properly, 270 if just a handheld tuner.

93M6Formula

Need more info than that but with what we know and assume, 320 HP max.

Jdawson38995

"I guess 300 if its tuned properly, 270 if just a handheld tuner."

I hate to be combative.....but it's 285 stock....I highly doubt it lost 15hp after adding the mods...

jewbacca

iTrader: (5)

... 285 flywheel vs rear wheel horse power. Do you want estimates on flywheel or rear wheel? While LT1's were usually under rated a bit, you weren't making 285 at the wheels stock. And in reality, depending on where your tune came from (handheld vs mail order), there could be a chance you didn't see a gain at all. Like bufmatmuslepants said, if it was a hand held expect around 270-280 at the wheels. If you got a proper mail order tune you could probably see around 300. If you get some real exhaust (long tubes and a cut out if you like the flowmaster sound) I would expect 330. Not sure why you went with 1.5 rockers. 1.6 would have benefited that cam a LOT more.

bufmatmuslepants

iTrader: (3)

All numbers are rear wheel. Stock you may have had 230-240 rwhp since your auto, 270 is realistic possibly optimistic if you used a handheld tuner through an exhaust that flows less than stock on 1.5 rockers which make the 503 not that big on a rebuild with low compression pistons. If you have 12:1 compression, longtubes, a cutout, and a dyno tune you could be near 340, but based on your posts, ill stick with 270 rwhp, 320 flywheel.

jewbacca

iTrader: (5)

It'd be interesting to see what slugs they threw in there for the rebuild. Who knows, maybe he's running a higher compression (doubt it).

Jdawson, with proper bolt-ons (long tubes, cutout, CAI (which you have), and a solid tune) you can see as high as 290 at the wheels (if you're lucky). Add the 503 (which has seen great gains on stock heads, though with 1.6 rockers) and you could see some GREAT gains. I can't remember who, but I thought I read about a guy hitting 340-350 with the 503 (don't quote me on that though). Was there a particular reason you went with the 1.5's? If you're upgrading to RR I really don't know why you would opt for 1.5's. Plenty of people have seen great gains with stock cams switching to 1.6's.

KW Baraka

iTrader: (7)

With stock heads through a 4L60E and no headers?

I'm gonna say 270 to 280 HP through the wheels.......

KW

KW Baraka

iTrader: (7)

If that was with stock heads, I wouldn't believe those claims.....not for a minute.

KW

jewbacca

iTrader: (5)

Look around a bit then, might open your eyes...

KW Baraka

iTrader: (7)

I repeat: "If that was with stock heads, I wouldn't believe those claims.....not for a minute."

KW

jewbacca

iTrader: (5)

Guess you're just the expert then. Look around and you'll see plenty of people making 340-350 HP on a well tuned stock headed cc503 (especially through an M6, but there are plenty of locked auto's getting right in there as well). The 503 is one of the best cams for stock heads.

https://ls1tech.com/forums/lt1-lt4-m...ing-cc503.html

93 LT1 Vette

295 to 305hp. Add Lt's and cutout 320.

myltwon

iTrader: (1)

I made 325rwhp with lt's, 1.6rrs, cc503, and 3k stall.

Whether or not you have headers, what compression you're at, and how good your tuner is will determine whether you fall above or below that.

Puck

iTrader: (17)

Brand stall will also make a big difference on RWHP through an auto as well. Some are terribly parasitic.

FWIW on my stock cube build with a 227int cam thats a bit bigger then the 503(plus 1.6s instead of 1.5s so it was even bigger then your 503/1.5rr setup), I only made 345 through a 3200 stall with ported heads and almost all supporting mods - thinner head gaskets, longtubes, 3" true duals, intake, valve springs, 1.6rrs, dyno tune, etc. Only HP mods I was missing was an EWP and UD pulley.

I don't see 330 on stock heads, auto, smaller cam, no longtubes, mail order...maybe 300-310 tops. Show me a 350 rwhp stock headed 503 car and I'll show you a happy dyno .

sweetbmxrider

iTrader: (13)

Go race it.

Catmaigne

iTrader: (6)

There are too many factors to consider so bitching over power estimates is pointless. Some cars make more and some make less, it's depends on how well your mods match up. Unfortunately, it doesn't sound like your setup is optimal for making the most power so I'd assume you're going to be disappointed.

Is your compression ratio stock or higher?
Install a full exhaust (Long tubes, ORY)
Ditch the Blowmaster for a real 3" catback
Upgrade to 1.6rr, more lift will help you
Do you have good valve springs?
Stock water pump or EWP?
How good is your tune? Is the knock module stock (because it could hurt you)?

Correct that stuff and you'll be in the 330 range