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Engine performance gain

This is a discussion on Engine performance gain within the Small Block forums, part of the Performance category; How much HP am I looking at when I put vortec heads, edl performer Rpm, lunati 262/268 over stock?...

  1. #1
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    Engine performance gain


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    How much HP am I looking at when I put vortec heads, edl performer Rpm, lunati 262/268 over stock?

  2. #2
    Registered User Doober's Avatar
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    Re: Engine performance gain

    No idea...

    What are you putting it on?

    What is the stock HP rating of whatever you're putting it on?

    What vehicle?

    What gearing?

    What trans?

    What size tires?

    Roundabout guess on the combination you listed is probably 325-345hp on a 350 depending on compression ratio.

    '92 Sierra (TBI 383/Vortecs/Comp 08-412-8/EBL/4L60/3.08s), '78 Malibu (Vortec'd 350/4-speed/2.29s), '87 Pontiac Fiero GT (2.8 v6/5-speed)


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    Registered User Rally Smith's Avatar
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    Re: Engine performance gain

    What gearing?

    What trans?

    What size tires?

    Non of these factors have any bearing on how much HP the engine will make.

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    Registered User Doober's Avatar
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    Re: Engine performance gain

    Nope.

    It will allow an informed decision to be made. If you throw an engine with a 2,500-6,500 powerband into a 5,000lb. truck with a 3.42 rear, stock stall converter, and 35" tires it will be an absolute dog everywhere you go, granted the cam isn't very big.

    '92 Sierra (TBI 383/Vortecs/Comp 08-412-8/EBL/4L60/3.08s), '78 Malibu (Vortec'd 350/4-speed/2.29s), '87 Pontiac Fiero GT (2.8 v6/5-speed)


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    Registered User Rally Smith's Avatar
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    Re: Engine performance gain

    Doesn't answer his question though. He wanted to know the power question, not the best performance question.

  6. #6
    Large Marge sent me SUBURBIAN's Avatar
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    Re: Engine performance gain

    Regardless, the OP has not provided nearly enough information to intelligently answer his question with any such reply containing merit, "Mr. Smith". This is the point Doober was trying to illustrate, that the OP should provide more information if he wants help with this matter.
    Last edited by SUBURBIAN; 03-23-2012 at 11:23 AM.
    1996 GMC K1500 SUBURBAN SLE
    355" L31 : DELPHI MPFI : 2.25" THRUSH DUALS : RCX SUSPENSION LIFT : RCX STEERING STABILIZER : RCX 2.2 SHOCKS : MOOG EVERYTHING : SMITTYBILT NERF BARS : OPEN GT4'S : DICK CEPEK DC2'S : 295/65/18 DURATRACS

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    Registered User Doober's Avatar
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    Re: Engine performance gain

    If nobody mentions it he may never know. Based off the information he gave he was given more or less the same amount of info back. He didn't specify if it was a '67 pickup with a 283, a '75 with a 400, a '95 with a 305, etc... there's no way of knowing WHAT he has so the only thing one can do is ASSume and make an educated guess at what he may have.

    *DERP*

    I can only type so fast on my phone.
    Last edited by Doober; 03-23-2012 at 11:26 AM.

    '92 Sierra (TBI 383/Vortecs/Comp 08-412-8/EBL/4L60/3.08s), '78 Malibu (Vortec'd 350/4-speed/2.29s), '87 Pontiac Fiero GT (2.8 v6/5-speed)


  8. #8
    Habitual Troublemaker cancritter's Avatar
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    Re: Engine performance gain

    not a expert on cams but that one looks huge..not something ld want in a daily driver...may be vacum issues(brake issues)..if that cam is as big as l think it is may wana add a aftermarket elec vacum pump....most here are running cams around the 207-234 range,,that cam you have would be something ld expect to see on a drag car ect im thinkin..then of course if thats what your buildin go for it
    [Stole/FOUND 13/03/08 :O)
    91GM 4x4 excb 5.7 @ 40 over, Westers,Eld 3704.Lunati Trickflow 195 @1.6 RR,Walpro 190/overbuilt 700r4 /TCS TC,4.10/tru trac,14 blt,Hooker LT,areofilter,Extreme TBI.MSD.AGR still adding
    07/ 6.7 Cummins..truck included
    70 fury 3
    71 sport fury GT

  9. #9
    Registered User Doober's Avatar
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    Re: Engine performance gain

    It's he advertised duration, not the .050" figures. If it's the cam I'm thinking it should make for a decent running engine, just need to make sure the rest of the drivetrain is set up properly.
    http://www.summitracing.com/parts/LUN-60102

    That's the only SBC Lunati cam with a 262/268 duration.

    '92 Sierra (TBI 383/Vortecs/Comp 08-412-8/EBL/4L60/3.08s), '78 Malibu (Vortec'd 350/4-speed/2.29s), '87 Pontiac Fiero GT (2.8 v6/5-speed)


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    Re: Engine performance gain

    It's in a c1500 shortbed, with stock flat top pistons, 3.42 posi rear end. 22's are the wheels, automatic th400.

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    Re: Engine performance gain

    350 v8.

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