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Stock ls1 head vs 5.3

This is a discussion on Stock ls1 head vs 5.3 within the Internal Engine forums, part of the LSx Technical Help Section category; Okay I am wondering. Does a 5.3 head flow better then the head I already have on my car its ...

  1. #1
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    1998 Z-28 A4

    Stock ls1 head vs 5.3

    Okay I am wondering. Does a 5.3 head flow better then the head I already have on my car its a 98 Z-28. I plan on gettting a set of heads that came off a truck that is ported and wanted to know would it be worth the swap. Also what will be a good cam I want to spray 100- 150 shot wet. Ima thinking I can go ten's easy with all the bolton's and the head & cam swap.

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    Senior Member Zboner's Avatar
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    10's is not easy by any means

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    Member zmg00camaross's Avatar
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    pewter
    2000 camaro ss

    5.3 heads when ported and milled flow good and bump compression. I think heads and cam and spray will get you there. Just have to have correct suspension, tires and size, a 12 bolt or 9 inch with proper gears and the list goes on. For
    A real 10
    Second car

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    Senior Member Zboner's Avatar
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    this is true if you dont have the suspesion you will never get there

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    do you plan on running high octane unleaded with the nos ?you don't want to much compression only running pump gas when spraying.

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    Yea I am going to run race gas when on the spray @ least 110 or 112.

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    🤔 11s. blackbirdbrain89's Avatar
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    for one 112 lsa cams have been know fore the best power.... and u can run 12-1 on 93 with a good tune... but not if ur going to spray at the same time....

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    Veteran Hi-Po's Avatar
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    Quote Originally Posted by blackbirdbrain89 View Post
    for one 112 lsa cams have been know fore the best power.... and u can run 12-1 on 93 with a good tune... but not if ur going to spray at the same time....
    Where did you pull that from?

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    Quote Originally Posted by Hi-Po View Post
    Where did you pull that from?
    I have a 385ci small block in my nova with 13-1 compression with a loose converter and run on pump gas all day long

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    Quote Originally Posted by VOODOOII View Post
    I have a 385ci small block in my nova with 13-1 compression with a loose converter and run on pump gas all day long
    I was commenting on a comical, very vague post. Dont know whos post your directing that to.

    Looks like I totally goofed up and got a 114. Dang.

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    1998 Z-28 A4

    What would be a good cam for my stock motor with stock heads. I want to run on motor for awhile.

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    Have you guys seen some good dyno & 1/4 mile times with the 5.3 heads and a cam on nos and motor. What's the best you have seen with a bolt-on car with just cam and cam & nos stock heads and bottem end.

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    how much will you be paying for these 5.3 heads?

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    Don't no yet how much are a set of ported 5.3 heads worth?

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    ive seen them on ebay before for around $600. I have some that are still bolted to the block, that are not ported. They are numbered 799. If i dont use them, im gonna sell them
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    cutting and welding mark21742's Avatar
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    Quote Originally Posted by HitManLs1 View Post
    Have you guys seen some good dyno & 1/4 mile times with the 5.3 heads and a cam on nos and motor. What's the best you have seen with a bolt-on car with just cam and cam & nos stock heads and bottem end.
    Bills98TA on here ran 10.81 with a 1.4 60' this past weekend and he is still working on his tune......24x/ 25x cam 5.3 heads 14:1 commpression and a 150 shot through an a4, 4:10 moser 9" rear and drag radials.......but he has all the suspension goodies and uses his wheelie bar when he launches

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    Member zmg00camaross's Avatar
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    What is a 24x/25x cam and what engine that's a lot of compression sorry for a little jacking of the tread

  18. #18
    cutting and welding mark21742's Avatar
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    Quote Originally Posted by zmg00camaross View Post
    What is a 24x/25x cam and what engine that's a lot of compression sorry for a little jacking of the tread
    I just can remeber the exact size the cam is, its huge for a stock cube ls1. 259/252 .607 lift 112 lsa (i just went back and checked on the size)
    he is running domed pistons and a 4,600 stall.....drag only car, its not driven on the street......runs 114 unleaded
    Last edited by mark21742; 07-02-2009 at 12:12 AM. Reason: cam size

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    O OK hey Mark do you know any guys who run in the 10's on motor with head & cam? That can be driven daily.

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    Member zmg00camaross's Avatar
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    Quote Originally Posted by mark21742 View Post
    I just can remeber the exact size the cam is, its huge for a stock cube ls1. I think 248/254 .609 lift 112 lsa (i think that is the size)
    he is running domed pistons and a 4,600 stall.....drag only car, its not driven on the street......runs 114 unleaded
    Well that helps I knew it had to be on race fuel with that compression.

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