LT1 383 stroker HP numbers
11-08-2017, 12:41 AM
#21
A cam that I had early success with in my 96 Impala and later in a '95 Caprice.......was a high-lift Comp Cams 224*/230* with 114* LSA and 4* advance. The lift was .605"/.622" with 1.6 roller rockers so you'll want a set of springs that's good to .650".
Int. Lobe #3192
Exh. Lobe #3194
This cam will have just 2* overlap. Jeezus.....if a tuner can't get you passing tune with this cam, they ain't worth a crap.
With 3.73 gears, my stroked Impala was VERY responsive right off throttle!
Never had either car dyno'ed, but my 4200 LB, '96 Impala ran low-12's with that cam and was an outstanding highway car...... Cam ran very clean with a slight lope at idle.
Best of luck with whatever you go with!
KW
11-08-2017, 10:27 PM
#22
Thank you for sharing your combination and testimony. I'm sad to hear that I can't manage at least 400 foot pounds of torque with a 383 stroker engine. That's a major disappointment. I could care less about the the horsepower, as torque is needed to move this beast of a car.
11-08-2017, 11:27 PM
#23
With the 224*/230* you'll get damn close.....close enough that you wouldn't know the difference, seat-of-your-pants.
But hell man.....don't worry about chasing numbers; it's results that you want. I mean.....if it's torque you're after, build a truck engine that's all low-RPM torque and no high-RPM power......like a diesel engine.
Oh yeah......from a 'been-there, done-that' perspective, you don't need 400tq to get the car moving.
My rule of thumb.....make HP with your engine, multiply your torque with the drive train! The 3.73 gears you're looking at, along with a good 3000 to 3600 stall torque converter is REALLY what you want.....to get the car moving!
KW
11-09-2017, 05:30 AM
#24
I don't know where this thread took a left turn with people thinking 400 ft-lbs is difficult with a stroker ??
You must be kidding. My 350 made 386 ft-lbs SAE to the wheels. I'd put money to a Hotcam in a 383 making 400 to the wheels. If you come up short, something is wrong with the build or the tune. Doing 400 with a cam like KW used is a slam dunk, and probably more emissions friendly than the Hotcam.
You must be kidding. My 350 made 386 ft-lbs SAE to the wheels. I'd put money to a Hotcam in a 383 making 400 to the wheels. If you come up short, something is wrong with the build or the tune. Doing 400 with a cam like KW used is a slam dunk, and probably more emissions friendly than the Hotcam.
11-09-2017, 09:19 AM
#25
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Well another option if you want to go real conservative on the cam is a LPE 211/219. It will idle stock, but a friend of mine who had one on his 383 with MTI heads made 390rwhp and 410rwtq and that was with the same tune he had when the motor had a cc306. Guaranteed to pass emissions and have stump pulling torque. Only catch is no lope.
11-09-2017, 12:53 PM
#26
I don't know where this thread took a left turn with people thinking 400 ft-lbs is difficult with a stroker ??
You must be kidding. My 350 made 386 ft-lbs SAE to the wheels. I'd put money to a Hotcam in a 383 making 400 to the wheels. If you come up short, something is wrong with the build or the tune. Doing 400 with a cam like KW used is a slam dunk, and probably more emissions friendly than the Hotcam.
You must be kidding. My 350 made 386 ft-lbs SAE to the wheels. I'd put money to a Hotcam in a 383 making 400 to the wheels. If you come up short, something is wrong with the build or the tune. Doing 400 with a cam like KW used is a slam dunk, and probably more emissions friendly than the Hotcam.
But, I listed and respect all other comments, input, discussions and experience.
11-09-2017, 12:59 PM
#27
Well another option if you want to go real conservative on the cam is a LPE 211/219. It will idle stock, but a friend of mine who had one on his 383 with MTI heads made 390rwhp and 410rwtq and that was with the same tune he had when the motor had a cc306. Guaranteed to pass emissions and have stump pulling torque. Only catch is no lope.
Great info...thanks...
11-10-2017, 10:13 AM
#29
11-19-2017, 07:31 AM
#30
"A cam that I had early success with in my 96 Impala and later in a '95 Caprice.......was a high-lift Comp Cams 224*/230* with 114* LSA and 4* advance. The lift was .605"/.622" with 1.6 roller rockers so you'll want a set of springs that's good to .650".
Int. Lobe #3192
Exh. Lobe #3194"
What RPM were you shifting that at?
Int. Lobe #3192
Exh. Lobe #3194"
What RPM were you shifting that at?
11-19-2017, 10:19 AM
#32
FormerVendor
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Calif Smog Law Hi ALL, I too am in CA with NO smog tested REQUIRED for my newer 2007 Escalade, etc. (The Law)
There ARE counties in CA with NO Smog Test Requirement, just an address to send the sticker is needed.
Lance
There ARE counties in CA with NO Smog Test Requirement, just an address to send the sticker is needed.
Lance
11-21-2017, 04:42 AM
#34
Back to the original post, a 383 can make as little as 330rwhp, or as much as 500 depending on heads, cam, compression and rpm. The scat cast crank mentioned is better than an eagle cast, but not as good as forged. Guys have taken a scat cast to 400-450rwhp just fine at 6500rpm, but there still is risk. A snapped crank can ruin your day, but a scat cast can survive a basic, budget 400rwhp combo just fine. A basic combo would be something like LE2s and a 230ish/236ish cam and shift at 6500, making around 400-420 to the tires, and near 400 rwtq through an m6. An m6 only eats around 12% drivetrain losses, an a4 eats around 18-20%, so crossing that 400rwtq number could just depend on your trans. AI200s and a bigger cam can make 420-460rwhp, spinning to the pcm limit of 7000. Step up to an aftermarket casting and the ceiling rises a little, but it's extremely uncommon for someone to crest 500rwhp on a normal 383. A 355 with a stock crank and forged rods and pistons is cheaper and stronger than a cast crank 383, and will make close to the same power on a basic setup. A stock unported head, hotcam, 10:1 magazine build (common for shops that build only sbcs) might only make 330rwhp, since they don't understand how an lt1 is 10.4:1 stock, lt4 is 10.8:1 stock, and should be aiming for 11-11.5:1 at least. it doesn't take 500rwhp to run 10s, guys have run high to mid 10s on 420rwhp on basic 383s pretty regularly.
11-21-2017, 03:14 PM
#35
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I made 445rwhp with my 389" LE Trick flows, custom cam and all the bolt ons! Was 11.25:1 compression, ported LT1 intake modified LS style lid system, through an m6 and 9-inch rear.
Car recently made 550 rwhp on a 100 shot - haven't gone higher on the dyno since I need a larger fuel system. I'm planning on a twin in tank set-up this winter and a 200 shot
Andy
Car recently made 550 rwhp on a 100 shot - haven't gone higher on the dyno since I need a larger fuel system. I'm planning on a twin in tank set-up this winter and a 200 shot
Andy
11-21-2017, 09:23 PM
#36
11 Second Club
Nice car
11-24-2017, 11:15 PM
#38
I made 445rwhp with my 389" LE Trick flows, custom cam and all the bolt ons! Was 11.25:1 compression, ported LT1 intake modified LS style lid system, through an m6 and 9-inch rear.
Car recently made 550 rwhp on a 100 shot - haven't gone higher on the dyno since I need a larger fuel system. I'm planning on a twin in tank set-up this winter and a 200 shot
Andy
Car recently made 550 rwhp on a 100 shot - haven't gone higher on the dyno since I need a larger fuel system. I'm planning on a twin in tank set-up this winter and a 200 shot
Andy
Are your heads the TFS 21* heads?
11-30-2017, 11:00 AM
#40
