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Ls1 383 stroker question

This is a discussion on Ls1 383 stroker question within the Internal Engine forums, part of the LSx Technical Help Section category; I am building a 99 ls1 383 stroker with Magic Stick V.4 239/242, .649"/.609" camshaft. I wanted to know what ...

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    1999 Z28 408 Stroker M6

    Ls1 383 stroker question


    I am building a 99 ls1 383 stroker with Magic Stick V.4 239/242, .649"/.609" camshaft. I wanted to know what horsepower to expect if i ran stock heads intake etc. And what you think I would run if I go a diffrent route same camshaft with Patriot Performance GM LS Series Stage II Cylinder Heads 67cc Chamber, 213cc Intake Runner, and LS6 intake. Thanks, I just wanted to wiegh the diffrence.

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    Senior Member Sleeper101's Avatar
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    Im fixing to start on my stroker too, would like to know the numbers you get?

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    Quote Originally Posted by Sleeper101 View Post
    Im fixing to start on my stroker too, would like to know the numbers you get?
    I will definatley hit you up. I just yesterday talked to a machine shop man up here in colorado and he said he built a 98 ls1 383 stroker and ran a comp cam, fast 90/90, 5.3 ls1 heads(which he told me to up the compression) and dynoed 350 hp and 390 trq. so i kinda was skeptical, and asked him if he dyno tuned the car and he said he hasnt dyno tuned it yet.

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    Senior Member Sleeper101's Avatar
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    I have heard from the machine shop I use and some family members, If you change the cam you absolutly have to reprogram the ECU, It will not run on a cam bigger than stock, also the program is 400$ plus tuning. So thats why im sticking to stock cam till I have the funds to upgrade the ecu,cam and heads all at the same time.

    My machine shop said they can built a 383 stroker, with a good cam upgrade, stock heads worked, ported/ polished, titanium springs,retainer, headers, just basic bolt on's and it dynoed at 365WHP tuned and got 26mpg.

    SO Its not going to be hard getting the power, but getting the ECU to like the power will be the hard part. Damn electronics are expensive!!!!!

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    Quote Originally Posted by Sleeper101 View Post
    I have heard from the machine shop I use and some family members, If you change the cam you absolutly have to reprogram the ECU, It will not run on a cam bigger than stock, also the program is 400$ plus tuning. So thats why im sticking to stock cam till I have the funds to upgrade the ecu,cam and heads all at the same time.

    My machine shop said they can built a 383 stroker, with a good cam upgrade, stock heads worked, ported/ polished, titanium springs,retainer, headers, just basic bolt on's and it dynoed at 365WHP tuned and got 26mpg.

    SO Its not going to be hard getting the power, but getting the ECU to like the power will be the hard part. Damn electronics are expensive!!!!!
    Im not woried about the ecu i have all of that covered. I have a progammer out here i use and he said it wouldnt be a problem. But yea i knew for sure it would need some computer mods. But with all good mods tuning is needed.

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    Hmmm. I don't know how well those heads flow, so I'm not sure what to tell you. 350/390 is horrible...I would stay away from that shop unless they have a valid explanation.
    I'm running a 244 cam in my 383 with some TEA 5.3s. I just got a new SD tune and am at 455rwhp/455rwtq, but we think the LS6 intake is costing some HP up top. I'd bet a ported FAST 90 would be worth 30rwhp. My combo is pretty mild, all things considered. Some 383s are well above 500rwhp.

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    Quote Originally Posted by danziger View Post
    Hmmm. I don't know how well those heads flow, so I'm not sure what to tell you. 350/390 is horrible...I would stay away from that shop unless they have a valid explanation.
    I'm running a 244 cam in my 383 with some TEA 5.3s. I just got a new SD tune and am at 455rwhp/455rwtq, but we think the LS6 intake is costing some HP up top. I'd bet a ported FAST 90 would be worth 30rwhp. My combo is pretty mild, all things considered. Some 383s are well above 500rwhp.
    thanks for the reply i appreciate the info, i am out here in colorado so we do struggle a little bit with the alltitude from time to time.lol. it sucks but what can you do? I do know people that have told me they have made easy 400 plus horsepower with the devils. And that those numbers were low to them also. I have heard great things about the fast 90 and many people out here at bandimere speedway are using them. the numbers you have mentioned would be plenty fine with me. I would definatley be happy with those numbers in my f body

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    Senior Member Sleeper101's Avatar
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    The setup were building is a 383 stroker bottom end and the top end, intake, heads, cam etc will have to stay stock due to working on a tight budget, 2000$, main goal is to just get the car back on the street and do bolt on's later. Current motor spun all the main bearings so it trashed the crank.

    I would be tickled pink to get anything over 350WHP with the stroker and stock setup but more than likely not going to happen.

    I'm running a 244 cam in my 383 with some TEA 5.3s. I just got a new SD tune and am at 455rwhp/455rwtq, but we think the LS6 intake is costing some HP up top. I'd bet a ported FAST 90 would be worth 30rwhp. My combo is pretty mild, all things considered. Some 383s are well above 500rwhp.
    Thats awesome man, good numbers.

    I hope to be making that someday.

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    Quote Originally Posted by 99Ls1fever View Post
    I will definatley hit you up. I just yesterday talked to a machine shop man up here in colorado and he said he built a 98 ls1 383 stroker and ran a comp cam, fast 90/90, 5.3 ls1 heads(which he told me to up the compression) and dynoed 350 hp and 390 trq. so i kinda was skeptical, and asked him if he dyno tuned the car and he said he hasnt dyno tuned it yet.
    Is he here in Greeley? I might be looking for someone to build up my block when I tear down my car this winter.

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    Quote Originally Posted by DanWS6 View Post
    Is he here in Greeley? I might be looking for someone to build up my block when I tear down my car this winter.
    Yea, I live up here in greeley. I also work down at bandimere dor the past three years. So, i think and I guess the more I am down there the more i meet people who are the heads of our sponser companies. And I meet Jack Bowers Who is the head sponser for our racing engines. And, I took a day up off to go up to Ft.Collins to his shop which is bowers racing engines. And his man focus is camaro's and LS1, LT1, and while i was there he had three ls1 strokers he was building, and i got a chance to talk with him. Before this I called around to see how much some one would charge me to put a set of eibach drop springs on my camaro. Every one was over $125 an hour for shop rates. I called Jack and his shop hours our $75 an hour and I was impressed with him and I am a machanic at Ghent in Greeley. He has a machine shop where i am getting my block done at. I am going to assembly the short block and take it to him. But I have put ALOT OF TIME in calling around shops in northern colorado for pricing on headers install or camshaft install and everyone in my opinion was jerking me. But he was really striaght forward and even let me cruise his shop and check out some of the race cars he had on lifts while he was working on my camaro. So, he probabley will be doing the rest of the work for me.

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    Cool. I'll just need to have the short block assembled for me. I plan on putting the rest of it together.

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    Senior Member Zboner's Avatar
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    dude honestly i think if your putting stock heads and intake on a 383 your wasiting your money to be honest, my friend did a 383 with the 90/90, 5.3's

    this might help you out some here is his entire mod list.

    and on a conservite tune they made 490 rwhp through a 12 bolt and some 315's out back. and that was at 12* of timing, they are hoping for about 550 NA, and with the N20 some 700's


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    Quote Originally Posted by DanWS6 View Post
    Cool. I'll just need to have the short block assembled for me. I plan on putting the rest of it together.
    to get the short block installed is easy if you buy the stroker kit. The kit through jegs and or summit is around $2,300 and comes with all thebearings and new pistions, rods, crank, rod bearings, its the whole package. But you will have to have your block machined for connecting rod clearance.

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    honestly i think if your putting stock heads and intake on a 383 your wasiting your money to be honest, my friend did a 383 with the 90/90, 5.3's

    this might help you out some here is his entire mod list.

    and on a conservite tune they made 490 rwhp through a 12 bolt and some 315's out back. and that was at 12* of timing, they are hoping for about 550 NA, and with the N20 some 700's
    • Accel 44# Fuel Injectors
    • Aeromotive Fuel Injected Bypass Regulator
    • ARP Head Stud Kit
    • ARP Main Stud Kit
    • ARP Rod Bolts
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    • Clevite 77 Rod Bearings
    • CompCams 1.7:1 ProMag Rocker Arms
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    • CompCams Double Roller Adjustable Timing Chain
    • CompCams R-Series Lifters
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    • Eagle Forged 6.200" Rods
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    [LIST][*]Taylor Thundervolt 11mm Wires
    First off your friend must have one hell of a car and some deep pockets, I fully agree if you dropped that much money into an engine you would be stacked. What is the diffrence between running 5.3 heads and 5.7 heads just the compression rate right? I would like to keep it where it can be ran on the street and your buddys car to me seems like it would have to run on 98 octane or more. that is extremley hard to find here in colorado for a car that is in the summer daliy driver. I am very impressed with his car. Did you find a LS1 rebuild manual out there? cause i have heard diffrent things about tourqe settings on heads and rods and mains. thanks for the wisdom drop.

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    Senior Member Zboner's Avatar
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    Quote Originally Posted by 99Ls1fever View Post
    [list][*]Taylor Thundervolt 11mm Wires
    First off your friend must have one hell of a car and some deep pockets, I fully agree if you dropped that much money into an engine you would be stacked. What is the diffrence between running 5.3 heads and 5.7 heads just the compression rate right? I would like to keep it where it can be ran on the street and your buddys car to me seems like it would have to run on 98 octane or more. that is extremley hard to find here in colorado for a car that is in the summer daliy driver. I am very impressed with his car. Did you find a LS1 rebuild manual out there? cause i have heard diffrent things about tourqe settings on heads and rods and mains. thanks for the wisdom drop.


    it runs on 93 or 92, you can tune it to run on that, i believer after all was said and done he spent like 10k on the motor, me personally would of went with a blower. the guy who built it owns his own shop here in Cincinnati. and worked as a corvette tech at GM for quite some time, and can pretty much tune anything honestly. his car is a weekend car it runs fine on the street

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    Quote Originally Posted by Zboner View Post
    it runs on 93 or 92, you can tune it to run on that, i believer after all was said and done he spent like 10k on the motor, me personally would of went with a blower. the guy who built it owns his own shop here in Cincinnati. and worked as a corvette tech at GM for quite some time, and can pretty much tune anything honestly. his car is a weekend car it runs fine on the street
    I agree there is better ways to spend $10k like stroker heads and cam super charger, procharger, or free horsepower through STS kit. Personally I want stroker, heads, cam and some type of forced induction. I personally am a big fan of the sts kit which is a turbo and is free horsepower off the exhaust and is not belt driven from the crank. But that is just me. That could all happen and still be close to $10k and have alot more horsepower for your buck.Out here in colorado we are starved for oxygen anyways.So, there are a handfull of camaro's that probabley get the air they need. Thanks for the hit back

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    Quote Originally Posted by 99Ls1fever View Post
    to get the short block installed is easy if you buy the stroker kit. The kit through jegs and or summit is around $2,300 and comes with all thebearings and new pistions, rods, crank, rod bearings, its the whole package. But you will have to have your block machined for connecting rod clearance.
    I'll take a look at their rotating assemblies. I was planning to piece together the forged parts myself though. Need to build up the block to handle the boost I'm throwing at it.

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    Quote Originally Posted by DanWS6 View Post
    I'll take a look at their rotating assemblies. I was planning to piece together the forged parts myself though. Need to build up the block to handle the boost I'm throwing at it.
    What boost are you throwing at it? I am very interested in forced induction, but i was definatley more interested in the sts turbo system because it is free horsepower from the exshaust instead of belt driven from the crank which in my opnion steals hp. just woundering. thanks

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    Quote Originally Posted by 99Ls1fever View Post
    What boost are you throwing at it? I am very interested in forced induction, but i was definatley more interested in the sts turbo system because it is free horsepower from the exshaust instead of belt driven from the crank which in my opnion steals hp. just woundering. thanks
    I saw about 11 pounds. Stock block... ran a 12.19 @ 114 at bandimere. I'm burning lots of oil now and we figure my rings are shot.

    I'm not a fan of having a turbo sitting in an easy spot where it can get stolen. Also the extra piping, etc would just be a pain to route back up to the engine.

    With a forged block and good blower cam I will easily get my 11.50 next year.

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    Quote Originally Posted by DanWS6 View Post
    I saw about 11 pounds. Stock block... ran a 12.19 @ 114 at bandimere. I'm burning lots of oil now and we figure my rings are shot.

    I'm not a fan of having a turbo sitting in an easy spot where it can get stolen. Also the extra piping, etc would just be a pain to route back up to the engine.

    With a forged block and good blower cam I will easily get my 11.50 next year.
    How often are you at bandimere? And what car do you have? I Have worked at Bandimere for the past three years. I work the starting line and the water box, I am sure i have seen you run. that is a hell of a lot of boost to be running on a stock bottom end. But, my car never sets out where a turbo could be stolen or anything. But, i do see alot of sts systems at badimere. and there is a z06 that has that kit that flat flys...

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