LT1 383 Stroker HP Question!!!!!!!
06-17-2015, 11:48 PM
#1
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LT1 383 Stroker HP Question!!!!!!! Okay i have a 96 lt1 that is a 383 stroker has ported stock heads, comp cam 280/290, ported intake, roller rockers, 58mm bbk throttle body, headers, 3 inch exhaust straight pipes, trans has been rebuilt stronger, has a nice shift kit 2500 stall and 3.73 gears. What kind of hp am i looking at so far?
Last edited by 98LT1423; 06-18-2015 at 12:00 AM.
06-18-2015, 12:42 AM
#2
Okay i have a 96 lt1 that is a 383 stroker has ported stock heads, comp cam 280/290, ported intake, roller rockers, 58mm bbk throttle body, headers, 3 inch exhaust straight pipes, trans has been rebuilt stronger, has a nice shift kit 2500 stall and 3.73 gears. What kind of hp am i looking at so far?
Who did the heads, what did they flow, how much lift on the cam, what size headers, what brand stall, what diameter stall, what size rockers, etc?
06-18-2015, 06:19 AM
#3
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^^ This, you left out a lot of very important information. Even then, it's only a guess. Dynos don't all read the same either. Taking it to a track would tell the real story. Also, that stall is WAY small for that setup.
06-18-2015, 06:54 AM
#4
What crank? Eagle cast? Who tuned it? What did it trap at the track with what race weight?
Too often people come on here after completing their builds looking for high fives, when had they come here first we could have helped make it right. Post your FULL build sheet, then we can make a guess or suggest changes.
Too often people come on here after completing their builds looking for high fives, when had they come here first we could have helped make it right. Post your FULL build sheet, then we can make a guess or suggest changes.
Last edited by bufmatmuslepants; 06-18-2015 at 07:08 AM.
06-18-2015, 11:06 PM
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All you other guys that replied thanks for your input but i did put the cam specs and who did my heads or what brands i have dosent have anything to do with hp whats done is done a brand is not gonna make a difference in hp. It will make a difference in how long **** is gonna last but hp not at all. Thanks anyways.
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06-18-2015, 11:35 PM
#8
All you other guys that replied thanks for your input but i did put the cam specs and who did my heads or what brands i have dosent have anything to do with hp whats done is done a brand is not gonna make a difference in hp. It will make a difference in how long **** is gonna last but hp not at all. Thanks anyways.
So we know it's a 383 with a shelf cam and heads that could've been worked by anyone... even a 10 year old. If you want any helpful input you need to include the details listed in post #2, they will dictate power. You neglected to tell us all of these important things which suggests that the parts were poorly matched to begin with.
None of this has anything to do with brand loyalty.
06-18-2015, 11:57 PM
#9
06-19-2015, 12:02 AM
#10
And my prediction? 580 at the wheels.
06-19-2015, 01:40 AM
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06-19-2015, 06:42 AM
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06-19-2015, 06:46 AM
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All you other guys that replied thanks for your input but i did put the cam specs and who did my heads or what brands i have dosent have anything to do with hp whats done is done a brand is not gonna make a difference in hp. It will make a difference in how long **** is gonna last but hp not at all. Thanks anyways.
Last edited by 93M6Formula; 06-19-2015 at 06:56 AM.
06-19-2015, 07:09 AM
#15
OP, were not trying to scare you away, but you need some thick skin and an open mind or you'll never get out of the internet alive. There's no brand loyalty here, none of us profit from what you buy, your success or your failure, we just like keeping the hobby and the platform alive. If you come in here with crazy expectations just looking for high fives and praise, you are going to get your feelings hurt.
You are not going to make 500 at the tires. Not happening. I'm assuming you mean a comp 280xfi cam, which is 230/236 on a 113 lsa, not a cam for 500rwhp. If your heads are just port matched, or a half *** port job from a local guy who doesn't know lt1s, your not going to get over 400 at the tires. If your motor was built by someone who doesn't know that lt1s can handle 11.5-12:1 on pump gas, you might have less than stock 10.4:1 compression, and not be over 350rwhp. If its not tuned, could be less than 300.
And if its an eagle cast crank, the Chinese POS that alot of guys on this forum have had snap in their motors, taking them out before 2000 miles, your not going anywhere.
You are not going to make 500 at the tires. Not happening. I'm assuming you mean a comp 280xfi cam, which is 230/236 on a 113 lsa, not a cam for 500rwhp. If your heads are just port matched, or a half *** port job from a local guy who doesn't know lt1s, your not going to get over 400 at the tires. If your motor was built by someone who doesn't know that lt1s can handle 11.5-12:1 on pump gas, you might have less than stock 10.4:1 compression, and not be over 350rwhp. If its not tuned, could be less than 300.
And if its an eagle cast crank, the Chinese POS that alot of guys on this forum have had snap in their motors, taking them out before 2000 miles, your not going anywhere.
06-19-2015, 07:51 AM
#16
The fact the owner lists advertized duration, displacement, and 2500 stall without listing .050" duration, lift/LSA etc. SCREAMS this whole thing was spec'd by someone without a clue.
Ignorantly built 383s examples can be as low as stock HP, actually been done by an 18yo kid that was here a few years ago, well built 383s hydraulic cam, ported stock heads examples can go over 450rwhp.
The range of actual examples seen on this forum literally ranges from 220-450+rwhp.
Things like advertized duration and 2500 stall say you aren't educated enough to even get to the 400rwhp number most folks expect from a 350 with heads and cam. Displacement isn't the answer most think it is, if the extra cubes can't breath(heads and cam) then they can't make power.
Quality of head porting is HUGE, ported heads can be anything from ruined to adding 100hp.
Advertized duration is vague at best, lazy low lift lobes might be down 15hp vs. something more modern and if you had some dimwit spec it at 114lsa or something rather than 108-110 it wont make the torque it could have.
NOBODY with half a clue would have told you 2500stall.
You probably trusted Comp or Summit's tech line both of which are terrible.
With the list of everything else it is very easy to worry about the tranny build quality as well, there are a LOT of shops that make this tranny weaker even while pretending to make it stronger, and any shop that was happy to put in a 2500stall probably falls into this category.
Asking questions FIRST is far more effective than asking "how great am I?" after making a whole slew of mistakes we see over and over and over again. It is way too common for folks to do a bad build then come and ask how great it will be. We don't want to tell you you did little right, we would all rather tell you how to do it right first. Those of us who have built cars have made mistakes, like using the crappy local tranny shop and will gladly help the next guy get it right the first time. That is what forums should be for.
Ignorantly built 383s examples can be as low as stock HP, actually been done by an 18yo kid that was here a few years ago, well built 383s hydraulic cam, ported stock heads examples can go over 450rwhp.
The range of actual examples seen on this forum literally ranges from 220-450+rwhp.
Things like advertized duration and 2500 stall say you aren't educated enough to even get to the 400rwhp number most folks expect from a 350 with heads and cam. Displacement isn't the answer most think it is, if the extra cubes can't breath(heads and cam) then they can't make power.
Quality of head porting is HUGE, ported heads can be anything from ruined to adding 100hp.
Advertized duration is vague at best, lazy low lift lobes might be down 15hp vs. something more modern and if you had some dimwit spec it at 114lsa or something rather than 108-110 it wont make the torque it could have.
NOBODY with half a clue would have told you 2500stall.
You probably trusted Comp or Summit's tech line both of which are terrible.
With the list of everything else it is very easy to worry about the tranny build quality as well, there are a LOT of shops that make this tranny weaker even while pretending to make it stronger, and any shop that was happy to put in a 2500stall probably falls into this category.
Asking questions FIRST is far more effective than asking "how great am I?" after making a whole slew of mistakes we see over and over and over again. It is way too common for folks to do a bad build then come and ask how great it will be. We don't want to tell you you did little right, we would all rather tell you how to do it right first. Those of us who have built cars have made mistakes, like using the crappy local tranny shop and will gladly help the next guy get it right the first time. That is what forums should be for.
06-19-2015, 11:25 PM
#18
omg I was thinking the same thing when I first responded.