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Old Oct 30, 2010 | 06:03 PM
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Default gains from stroking

just curious as to what you gain HP wise going from 347 to 383 mod for mod what will you pick up??
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Old Oct 30, 2010 | 06:38 PM
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Depends what ur changing Just CI , I whould say a well speced 383 will make 30 to 40 more rwhp then a 346
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Old Oct 31, 2010 | 05:36 PM
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what about torque numbers about the same difference or higher yet?
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Old Oct 31, 2010 | 06:44 PM
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If you're already getting a peak hp lower than your rev limit, you won't make more peak hp USING THE SAME PARTS. You will make the same power, but shift the power curve to a lower rpm range. If you up the head/cam intake package to suit the extra cubes, you can keep the same basic power curve, but stronger overall.

The extra compression that can come from stroking it would help power, however.

Torque numbers follow the same stuff as the hp, depends if you're matching parts for the extra cubes.

If you like where your power is, but want more overall, cam it with the extra stroke. Heads too if $$ lets you.
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Old Oct 31, 2010 | 07:03 PM
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well i have already got the parts i guess
TSP 383 stroker kit balanced 11.25:1
Fast 90/90 setup
PRC 5.3L stage 2.5 heads. had them ported to get rid of reverse flow numbers...now they actually flow what they are suppose to after 300-400 dolars of porting
MS4 cam
Kooks 1 3/4" LTS
not sure where this setup will put me but hoping to get around 430RWHP with an A4

Last edited by little_chewy_69; Nov 3, 2010 at 05:41 PM.
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Old Oct 31, 2010 | 07:53 PM
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with the right converter you mite see 480/470 hp/tq.I'm concerned about your converter,does it have a adapter ring on the front?if so get a different converter.
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Old Oct 31, 2010 | 09:29 PM
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leaving a lot of potential on the table with that garbage TCI converter, no offense.
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Old Oct 31, 2010 | 11:20 PM
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That sounds like a good setup that 383 should do good with that ms4 cam.
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Old Nov 1, 2010 | 02:55 PM
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Originally Posted by little_chewy_69
well i have already got the parts i guess
TSP 383 stroker kit balanced 11.25:1
Fast 90/90 setup
PRC 5.3L stage 2.5 heads. had them ported to get rid of reverse flow numbers
MS4 cam
Kooks 1 3/4" LTS
not sure where this setup will put me but hoping to get around 430RWHP with an A4
you'll get more than that..I have those heads and a fast 90 with 232/238 cam in a 4400 stall and make a lil over 430rwhp
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Old Nov 1, 2010 | 07:09 PM
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My boys 383ci makes 500hp near 470tq,m6 car. Close to stock weight runs 10's n/a
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Old Nov 1, 2010 | 07:14 PM
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6.0 370 > ls1 383 because of the larger 4" bore, would look into building a lq4/9
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Old Nov 2, 2010 | 10:45 AM
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Post numbers when you get that setup in I was really curious about the ms4 in a ls1 stroker combo
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Old Nov 2, 2010 | 11:06 AM
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Originally Posted by garygnu
with the right converter you mite see 480/470 hp/tq.I'm concerned about your converter,does it have a adapter ring on the front?if so get a different converter.
My converter has a ring around it, is that a bad thing? i was wondering about that.
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Old Nov 3, 2010 | 01:20 PM
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Originally Posted by garygnu
with the right converter you mite see 480/470 hp/tq.I'm concerned about your converter,does it have a adapter ring on the front?if so get a different converter.
well i kind of planned on replacing the converter when i get the tranny rebuilt in the spring im sure it will stall to about 4500-5000 because i think it's specced for mildly modified at 3500. but what is the deal with the adapter ring what happens if it has one???
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Old Nov 3, 2010 | 01:30 PM
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Originally Posted by reeperz28
Post numbers when you get that setup in I was really curious about the ms4 in a ls1 stroker combo
i am too i guess but by the time it's all said and done it will be about a month before i have some graphs in front of me. Im not doing this myself so a lot of talking on the phone to be on the same page as him. still waiting to get the bottom end together and heads on so i can order pushrods
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Old Nov 3, 2010 | 01:37 PM
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Here is my 393 (3.9x4.1)
https://ls1tech.com/forums/dynamomet...acing-cam.html
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Old Nov 3, 2010 | 03:28 PM
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Originally Posted by NoGamesLS1
thanks for the insight pretty close to my build a little less cam a little better head minus the m6 so i would guess i should be be somewhere around 470 rwhp at best
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Old Nov 3, 2010 | 04:46 PM
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Originally Posted by 180ls1
6.0 370 > ls1 383 because of the larger 4" bore, would look into building a lq4/9
^this
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Old Nov 3, 2010 | 05:21 PM
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to answer that yeah i looked into building a 408 but im not gonna chuck this project that i have about 5 grand in and start over sorry i don't have that kind of money to waste. i thought i had a block and rotating assembly for 2 grand but he acted pretty shady and didn't seem like the type of person i like to deal with. and that discouraged me a little so i just said the hell with it a 383 will get me where i want to be. i have to stop somewhere because im not sticking 10 grand in a motor. another reason is my intake is cathederal port and i think i want to leave it that way. in all reality the cost difference is really just buying the block kits are the same. then i would get ragged on for having a set of 5.3's on it. sorry im not trying to come off as a dick.

Last edited by little_chewy_69; Nov 3, 2010 at 05:28 PM.
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Old Nov 3, 2010 | 07:11 PM
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Originally Posted by little_chewy_69
i am too i guess but by the time it's all said and done it will be about a month before i have some graphs in front of me. Im not doing this myself so a lot of talking on the phone to be on the same page as him. still waiting to get the bottom end together and heads on so i can order pushrods
hmm confused to whom is him ha dont matter here is one of my threads from the other day thats how i got my block just waiting for the money to allow for stroker kit and the un enending list of parts to support it. hope the build goes good.

https://ls1tech.com/forums/generatio...cast-iron.html
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