Need feedback on my plans
#1
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Join Date: May 2005
Location: California
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Car: 1991 Z28 Camaro
Engine: 5.7L V8
Transmission: auto
Need feedback on my plans
Hi everyone.
I have a 1991 5.7 that I am needing to do some work on. It's got a lot of miles, but I think the low end is OK- I'm planning to do a leakdown test on each cylinder to gauge things first.
As long as that is OK, my plans are as follows:
Swap out the intake for a polished rebuilt replacement. While I am doing that, I will extrude hone the lower manifold. Since I am planning to rebuild the heads, I want to extrude home those, do a valve job and mate them up with a set of Dyno Don headers.
I know that there are all sorts of options; Stealth Ram, Super Ram, Dodge Ram, LA Rams, LS swap, twin turbo LS7. But I am just looking to get the old girl back to a peppy stock condition with a LITTLE improvement.
Given that a) I am staying with the stock intake and heads, b) I am in California so need to stay smog legal and c) I don't want some lumpy idle dragster- I want a smooth running driver that will get up and go when I stomp on it, I have a few questions:
1) will adding some Scorpion 1.6 rockers help, hurt?
2) since I will change out the timing chain, is a cam upgrade worth doing and if so, what one and how will it effect the driveability?
3) is a cam needed to make the rockers worthwhile?
4) what kind of horsepower improvement can I reasonably expect from what I have planned?
5) does any of this require a chip or reprogram- something that is WAY out of my league?
Any feedback is GREATLY appreciated!
I have a 1991 5.7 that I am needing to do some work on. It's got a lot of miles, but I think the low end is OK- I'm planning to do a leakdown test on each cylinder to gauge things first.
As long as that is OK, my plans are as follows:
Swap out the intake for a polished rebuilt replacement. While I am doing that, I will extrude hone the lower manifold. Since I am planning to rebuild the heads, I want to extrude home those, do a valve job and mate them up with a set of Dyno Don headers.
I know that there are all sorts of options; Stealth Ram, Super Ram, Dodge Ram, LA Rams, LS swap, twin turbo LS7. But I am just looking to get the old girl back to a peppy stock condition with a LITTLE improvement.
Given that a) I am staying with the stock intake and heads, b) I am in California so need to stay smog legal and c) I don't want some lumpy idle dragster- I want a smooth running driver that will get up and go when I stomp on it, I have a few questions:
1) will adding some Scorpion 1.6 rockers help, hurt?
2) since I will change out the timing chain, is a cam upgrade worth doing and if so, what one and how will it effect the driveability?
3) is a cam needed to make the rockers worthwhile?
4) what kind of horsepower improvement can I reasonably expect from what I have planned?
5) does any of this require a chip or reprogram- something that is WAY out of my league?
Any feedback is GREATLY appreciated!
#5
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iTrader: (2)
Re: Need feedback on my plans
Though extrude / honed is expensive, finding an aftermarket base is now also expensive... A few years ago a guy was dropping about 20 of them for $150 each new, now they go for upwards of $750 on ebay... they are getting harder to find...
If you're going all that route / expense / (extrude honed stock heads), with aftermarket cam and rockers, I would put the $$$ towards some aftermarket heads that will support the high lift...
If you're going all that route / expense / (extrude honed stock heads), with aftermarket cam and rockers, I would put the $$$ towards some aftermarket heads that will support the high lift...
#6
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iTrader: (92)
Re: Need feedback on my plans
https://m.ebay.com/itm/TPI-lower-man...YAAOSwrslabTDi
Here’s a extruded intake, you can get a aftermarket used base for the same pricing range.
Here’s a extruded intake, you can get a aftermarket used base for the same pricing range.
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