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Thoughts on First mods to High mileage 01 Z28

This is a discussion on Thoughts on First mods to High mileage 01 Z28 within the Internal Engine forums, part of the LSx Technical Help Section category; My first Planned mods to a totally stone stock LS1 are an intake, 1.8 rrs (new comp cams ones? saw ...

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    Thoughts on First mods to High mileage 01 Z28

    My first Planned mods to a totally stone stock LS1 are an intake, 1.8 rrs (new comp cams ones? saw them in gmhtp) replacement valve springs and possibly a very very mild cam in the near future. the motor has 115k miles on it anything I should be aware of?

    I have a few questions on other mods.. does mezzier have an ewp for the ls1?
    are there underdrive pullies?

    Would any of you reccomend either of those?
    Last mods will hopefully be a set of longtubes with a new exhaust. Any brand of longtubes not liked on the forums?

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    Member c5z28's Avatar
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    Money better spent in other areas. First off 1.7 rockers if you absolutley must. Water pump like your underdrive pulley lets the car get to the powerband faster but you will only see minimal gains in performance especially if your not rolling w/ the heads and cam.
    Slp sucks and everything else is fine-some have even gotten the cheapo stainless ebay headers. As long as the motor was taken care of a cam won't hurt the motor, more of a problem for the rearend's
    Money for the water pump and underdrive pulley is your money for a complete cam swap (cam springs pushrods) anywhere from 30rwhp on up w/ headers.

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    Quote Originally Posted by Dr.Crash View Post
    my rear is holding up ok....... for now
    Your rearend is supported by a jackstand- i'll race you from a dig to 50mph
    oh and go to bed

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    Thanks guys. I'll pass on the waterpump and pullies for sure. I was thinking to go with 1.8 roler rockers and fresh valve springs just to make sure when I rev her out I'm not floating anything. Plus I believe the 1.8s should add just about 5-10 hp at least.

    Stock rockers are roller tip 1.7 right? or full roller?

    does my 01 have the ls6 manifold ?

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    Quote Originally Posted by 5abivt View Post
    Thanks guys. I'll pass on the waterpump and pullies for sure. I was thinking to go with 1.8 roler rockers and fresh valve springs just to make sure when I rev her out I'm not floating anything. Plus I believe the 1.8s should add just about 5-10 hp at least.

    Stock rockers are roller tip 1.7 right? or full roller?

    does my 01 have the ls6 manifold ?
    Stock rockers are 1.7 roller fulcrum (not roller tip) and your `01 does have an LS6 intake.

    If your planning a cam at all I would save the cash on the 1.8 rockers and do the cam, matched springs, new pushrods and put the rocker money towards a tune.
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    I was thinking to do the rockers first I will definitely want them if I do a cam or more mods in the future. the motor has 118k miles so I am already planning a very mild stroker rebuild perhaps next summer so maybe the cam can wait. I have just heard some horror stories over the years and many people preaching that the stock rockers are just not reliable with cams or strokers.

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    Quote Originally Posted by c5z28 View Post
    Your rearend is supported by a jackstand- i'll race you from a dig to 50mph
    oh and go to bed
    I'll have you know that I have been driving my car for the last two days. Still wanna race? LOL and hey your still up too. Don't give me shit.

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    TJEA Retirement Home Dr.Crash's Avatar
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    Quote Originally Posted by 5abivt View Post
    I was thinking to do the rockers first I will definitely want them if I do a cam or more mods in the future. the motor has 118k miles so I am already planning a very mild stroker rebuild perhaps next summer so maybe the cam can wait. I have just heard some horror stories over the years and many people preaching that the stock rockers are just not reliable with cams or strokers.
    Hey the stock rockers really are just fine. I'm running them and I'm not even close to stock.

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    Here this thread should help w/ your rocker setup question.
    http://www.ls1tech.com/forums/genera...8-rockers.html
    Again here is the electric water pump and rockers
    http://store.summitracing.com/egnsea...838996&NeXID=5
    though they did not have the right size you could expect to pay $380 for these new
    http://store.summitracing.com/egnsea...115+4294745456
    underdrive pulley
    http://kentucky-speed.com/9802-fbody...a128577f0f2015
    $620+380+200=$1200 us dollars I can only imagine what it costs for you. If you knew you were going to spend this you have more than enough for a head and cam swap. Or just do the cam swap
    cam=300 pushrods=100 valvesprings=200 oil pump=185timing chain=50
    hurts when you see the #'s before you huh?

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    Actually, there was a post in AAG about a month or two ago. The guy's friend owned a dyno and they dynoed after every mod to his car. The best bang for the buck on his set up was the Underdrive Pulley. His car gained 12.9 rwhp and around 18 ft-lbs of torque. They were all done on the same dyno with little variences to weather and humidity. I wish I could dig up the post but it was AWESOME. Showed every mod all the way to full bolt ons with a dyno after every one to show progress.
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    Quote Originally Posted by c5z28 View Post
    Here this thread should help w/ your rocker setup question.
    http://www.ls1tech.com/forums/genera...8-rockers.html
    Again here is the electric water pump and rockers
    http://store.summitracing.com/egnsea...838996&NeXID=5
    though they did not have the right size you could expect to pay $380 for these new
    http://store.summitracing.com/egnsea...115+4294745456
    underdrive pulley
    http://kentucky-speed.com/9802-fbody...a128577f0f2015
    $620+380+200=$1200 us dollars I can only imagine what it costs for you. If you knew you were going to spend this you have more than enough for a head and cam swap. Or just do the cam swap
    cam=300 pushrods=100 valvesprings=200 oil pump=185timing chain=50
    hurts when you see the #'s before you huh?


    like a boy scout......... always prepared.

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    Quote Originally Posted by blackSS01 View Post
    Actually, there was a post in AAG about a month or two ago. The guy's friend owned a dyno and they dynoed after every mod to his car. The best bang for the buck on his set up was the Underdrive Pulley. His car gained 12.9 rwhp and around 18 ft-lbs of torque. They were all done on the same dyno with little variences to weather and humidity. I wish I could dig up the post but it was AWESOME. Showed every mod all the way to full bolt ons with a dyno after every one to show progress.
    Plenty of others showing little or no gains just like your $600 water pump

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    TJEA Retirement Home Dr.Crash's Avatar
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    Quote Originally Posted by c5z28 View Post
    Plenty of others showing little or no gains just like your $600 water pump

    isnt it past your bed time?

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    TJEA Retirement Home Dr.Crash's Avatar
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    oh and i LOVE my UD pulley!!!

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    Quote Originally Posted by Dr.Crash View Post
    oh and i LOVE my UD pulley!!!
    If I wate 2 weeks to jerk off I like it just that much more. I'm sure that's pretty close to the time you wated for your ud pulley right?

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    Some one correct me if I am wrong, but should't his first mod be LT headers! I would think he would gain the most from them, expecially being that he is going to to do all those other mods also.
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    Quote Originally Posted by Dr.Crash View Post
    like a boy scout......... always prepared.
    Quote Originally Posted by c5z28 View Post
    Plenty of others showing little or no gains just like your $600 water pump
    Quote Originally Posted by Dr.Crash View Post
    isnt it past your bed time?
    Quote Originally Posted by Dr.Crash View Post
    oh and i LOVE my UD pulley!!!
    Quote Originally Posted by c5z28 View Post
    If I wate 2 weeks to jerk off I like it just that much more. I'm sure that's pretty close to the time you wated for your ud pulley right?
    Nice to see someone else acts like Dr. Crash and I do!

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    GM High Tech Performance (last month) has a write up on wakin up a tired LS1. The mentioned roller 1.8's ....
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    I don't sell out! blackSS01's Avatar
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    Quote Originally Posted by c5z28 View Post
    Plenty of others showing little or no gains just like your $600 water pump
    Actually, I am going to respectively disagree on this. EWP has shown to help out quite a bit. Will it add as much power as LT's........no, but when squeezing every bit of power out it helps. That and running the motor much cooler which increases engine life.

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