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Old 10-04-2012, 05:27 PM   #1
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Performance mods

Is there a post of mods that up the HP on stock ZL1s?
Something like a list and what you gain in HP. Thanks
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Old 10-04-2012, 05:42 PM   #2
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there are some threads about different vendors builds and what they got out of them. below seem like some of the ~numbers I have seen.

~20-30hp cai and tune
~80hp upper pulley cai tune
ported snout ~15-20hp I think (usually done with other mods)
ported tb 10-15hp I think. (usually done with other mods)
headers ~30hp (I have read you can loose a lb of boost so you are not going to net that without replacing the lost boost.)
cam ~30+hp
heads ~30+hp
then lower pullie can be thrown int he mix as well. 15-16lbs seems to be the most i see people run "safely" according to the larger tuners.

If any body see's any error's in my number feel free to point them out as I did not stay in a holiday in express last night.

the most I have seen people throwing around I think on stock bottom ends is like ~700-750whp range.
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Old 10-04-2012, 05:50 PM   #3
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Many posts like this. Hog is about right.
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Old 10-04-2012, 06:01 PM   #4
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Many posts like this. Hog is about right.
I'd agree, seems to be right on par
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Old 10-04-2012, 08:24 PM   #5
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Thank you,
What may help me is a company I can be directed to, or a catalog?
I would like to see parts I can buy, I have worked for Chevy many years back in the 70 s
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Old 10-04-2012, 08:37 PM   #6
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Heres the thread...
http://www.camaro5.com/forums/forumdisplay.php?f=145

Those doing mod's post the results. Many reputable sources are doing so here.
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Old 10-04-2012, 08:41 PM   #7
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Quote:
Originally Posted by hognutz View Post
there are some threads about different vendors builds and what they got out of them. below seem like some of the ~numbers I have seen.

~20-30hp cai and tune
~80hp upper pulley cai tune
ported snout ~15-20hp I think (usually done with other mods)
ported tb 10-15hp I think. (usually done with other mods)
headers ~30hp (I have read you can loose a lb of boost so you are not going to net that without replacing the lost boost.)
cam ~30+hp
heads ~30+hp
then lower pullie can be thrown int he mix as well. 15-16lbs seems to be the most i see people run "safely" according to the larger tuners.

If any body see's any error's in my number feel free to point them out as I did not stay in a holiday in express last night.

the most I have seen people throwing around I think on stock bottom ends is like ~700-750whp range.
If you lose boost with headers, you don't need to up the boost to net the gain. You're just getting that power without having to spin the blower as fast and needing extra cooling... I think
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Old 10-04-2012, 09:43 PM   #8
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If you lose boost with headers, you don't need to up the boost to net the gain. You're just getting that power without having to spin the blower as fast and needing extra cooling... I think
Boost = HP you lose a pound you are not making as much power as you would have. Headers alone might only get 15-20hp because of the boost you lost. $1500 is an expensive 15-20hp.
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Old 10-04-2012, 09:47 PM   #9
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Here is mine and what my mods got me. Different from what's being said here, a little.

http://www.camaro5.com/forums/showth...8&goto=newpost
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Old 10-04-2012, 09:50 PM   #10
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Originally Posted by Skylane765 View Post
Thank you,
What may help me is a company I can be directed to, or a catalog?
I would like to see parts I can buy, I have worked for Chevy many years back in the 70 s
Lots of vendors use lingenfelter pullies. There are tons of intake manufacures. kdi and adm come to mind on porting work.

In my mind I am leaning towards ported snout(has to come off for upper pulley), ported or new tb, cai, tune. Injectors if the max out.

I was going to do headers but then you need lower pulley most likely which requires balancer as well.

600-625whp is where I will quit. Otherwise my wife will star acting like a vag1na about the car being to scary to drive.
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Old 10-04-2012, 10:41 PM   #11
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Thank you guys
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Old 10-05-2012, 07:21 AM   #12
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Check Lingenfelters website!
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Old 10-05-2012, 07:39 AM   #13
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Quote:
Originally Posted by hognutz View Post
there are some threads about different vendors builds and what they got out of them. below seem like some of the ~numbers I have seen.

~20-30hp cai and tune
~80hp upper pulley cai tune
ported snout ~15-20hp I think (usually done with other mods)
ported tb 10-15hp I think. (usually done with other mods)
headers ~30hp (I have read you can loose a lb of boost so you are not going to net that without replacing the lost boost.)
cam ~30+hp
heads ~30+hp
then lower pullie can be thrown int he mix as well. 15-16lbs seems to be the most i see people run "safely" according to the larger tuners.

If any body see's any error's in my number feel free to point them out as I did not stay in a holiday in express last night.

the most I have seen people throwing around I think on stock bottom ends is like ~700-750whp range.
I did all the above, delete the heads and add a full Supercharger port, brings you to 700. Motor seems to easily handle it. I wouldn't go anymore, though. Your tires wouldn't last a month!
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Old 10-05-2012, 07:44 AM   #14
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Originally Posted by hognutz View Post
Lots of vendors use lingenfelter pullies. There are tons of intake manufacures. kdi and adm come to mind on porting work.

In my mind I am leaning towards ported snout(has to come off for upper pulley), ported or new tb, cai, tune. Injectors if the max out.

I was going to do headers but then you need lower pulley most likely which requires balancer as well.

600-625whp is where I will quit. Otherwise my wife will star acting like a vag1na about the car being to scary to drive.
My wife drove mine the other day, she did fine. It's all in the throttle control. Engine doesn't boost unless you throttle it hard. She keeps I't in the vacum, drives stock. When I drive it I can't keep the rear end in line with the front!
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Old 10-05-2012, 08:19 AM   #15
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The good thing about these cars is that you really don't have to touch the exhaust because its already bada$$
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Old 10-05-2012, 09:34 AM   #16
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If the boost goes down due to freeing up the exhaust you have gained power. The cylinder is emptying further due and is then being filled with more unburnt fresh charge even though the final pressure is less. Prior to freeing up the exhaust more burnt charge was remaining in the cylinder and then the cylinder was being filled on top of that. A secondary benefit of freeing up the exhaust is that with the lower final pressure the heat produced by the compression in the blower is also less resulting in a denser charge. Keep in mind that the blower in both cases is flowing approximately the same volume. Reducing restriction upstream of the blower results in more boost pressure (the blower flows more), reducing restriction after the cylinder results lower boost pressure but a more complete cylinder charge.
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Old 10-05-2012, 10:02 AM   #17
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My wife drove mine the other day, she did fine. It's all in the throttle control. Engine doesn't boost unless you throttle it hard. She keeps I't in the vacum, drives stock. When I drive it I can't keep the rear end in line with the front!
well the story is with our Z06 she had a couple "close calls". in or 08 C6 coupe she felt more in control. since the ZL1 is more like the 08 in that area she doen't want me to mess with it.

My wife has a lead foot so if the throttle is there she will use it. my analogy is she is like cheap lawnmower two speeds turtle or rabit. I think the traction control works better on this car that my Z06 I don't think it will be an issue.

I still think she is being a puss and will just continue to insult her manhood till she drops it.
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Old 10-05-2012, 11:44 AM   #18
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Boost = HP you lose a pound you are not making as much power as you would have. Headers alone might only get 15-20hp because of the boost you lost. $1500 is an expensive 15-20hp.
Be careful there. I honestly don't know about this particular car, but it is ultimately about power UNDER the curve. Headers usually change your torque curve significantly. So while HP may not go up much, the power under the curve will. And that is what gets you down the track.

A great example of this was the Terminator Cobras. That car gained about 5hp with headers so all those gay boy dyno racers didn't do them and they struggled to get out of the 12s with 450rwhp(typical bolt on mods). I knew two guys that did the typical boltons AND headers and they were well into the 11s.

Just something to think about!
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Old 10-05-2012, 06:04 PM   #19
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Originally Posted by Enough View Post
If the boost goes down due to freeing up the exhaust you have gained power. The cylinder is emptying further due and is then being filled with more unburnt fresh charge even though the final pressure is less. Prior to freeing up the exhaust more burnt charge was remaining in the cylinder and then the cylinder was being filled on top of that. A secondary benefit of freeing up the exhaust is that with the lower final pressure the heat produced by the compression in the blower is also less resulting in a denser charge. Keep in mind that the blower in both cases is flowing approximately the same volume. Reducing restriction upstream of the blower results in more boost pressure (the blower flows more), reducing restriction after the cylinder results lower boost pressure but a more complete cylinder charge.
What is being done when you free up the blower? Are you saying the intake is ported or the output is ported under the blower?
So if I put headers on, what would need to be done on the intake side? Can anything be bolted on? Yes heads can, but I do not want to go that far.
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Old 10-05-2012, 06:06 PM   #20
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Quote:
Originally Posted by hognutz View Post
Lots of vendors use lingenfelter pullies. There are tons of intake manufacures. kdi and adm come to mind on porting work.

In my mind I am leaning towards ported snout(has to come off for upper pulley), ported or new tb, cai, tune. Injectors if the max out.

I was going to do headers but then you need lower pulley most likely which requires balancer as well.

600-625whp is where I will quit. Otherwise my wife will star acting like a vag1na about the car being to scary to drive.
looks like I want to do what you are thinking of doing.
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Old 10-05-2012, 08:29 PM   #21
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What is being done when you free up the blower? Are you saying the intake is ported or the output is ported under the blower?
So if I put headers on, what would need to be done on the intake side? Can anything be bolted on? Yes heads can, but I do not want to go that far.
Free-er flowing air intake/filter, larger throttle body and porting the front side of the blower. You can put headers on without doing anything to the intake side.
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