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Old Aug 15, 2009 | 07:34 AM
  #61  
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Originally Posted by Frans96ss
Not true. People have done back to back test and the 1 7/8 actually out performed it down low and up high.
Did anyone come up with the link with this back to back test results?

On this list of mods.....it will be interesting to here the results..I might what to copy it...if that's allowed.

Oh, one more thing, if you are paying a premium for the LS7 lifters over NEW from GM stock LS1 or LS2 lifters, buy the LS1's. They're all the same lifter now, no difference.

Last edited by Eric D; Aug 15, 2009 at 07:38 AM.
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Old Aug 15, 2009 | 10:51 PM
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Originally Posted by AU N EGL
Not going to matter. Once your get this installed and tuned, your right foot will be on the floor. So I would say 5-6 ,mpg
Well I hope it's not that bad.

Anyone with a H/C setup? If so whats your average MPG for daily driving city/highway?

Also still waiting to hear on the clearance issue. Is there one or not? Kinda confused on this point.

Thanks!
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Old Aug 17, 2009 | 08:58 AM
  #63  
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*bump*

I really want to know about the clearance issue. Is 59cc to much?

And gas mileage would be nice if people could post some average mpg for daily drivers with h/c

Not stomping on it either just regular daily driving mpgs.

Last edited by 0Stealth0; Aug 17, 2009 at 01:54 PM.
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Old Aug 18, 2009 | 09:02 AM
  #64  
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Originally Posted by 0Stealth0
*bump*

I really want to know about the clearance issue. Is 59cc to much?

And gas mileage would be nice if people could post some average mpg for daily drivers with h/c

Not stomping on it either just regular daily driving mpgs.
Not sure in the clearance issues. You would probably want to check PVC regardless. If you need more room just flycut the pistons.

My H/C would average 23-24MPH(6 speed w/ 4.10s) Would get as high as 27 on the highway.
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Old Aug 18, 2009 | 10:07 AM
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Originally Posted by nickolbag
Not sure in the clearance issues. You would probably want to check PVC regardless. If you need more room just flycut the pistons.

My H/C would average 23-24MPH(6 speed w/ 4.10s) Would get as high as 27 on the highway.
Wow that's actually better then what I average now on a stock motor. My average is around 18-19mpg but I think that either the MAF needs cleaned or the filter does or just a good tune up needs performed (which I will do when I install the H/C setup )

Do you need to remove the pistons to have them flycut or can someone come out and do it while they are in the block? And does this make them "weaker"?

Thanks!
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Old Aug 18, 2009 | 10:31 AM
  #66  
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Originally Posted by 0Stealth0
*bump*

I really want to know about the clearance issue. Is 59cc to much?

And gas mileage would be nice if people could post some average mpg for daily drivers with h/c

Not stomping on it either just regular daily driving mpgs.
ok i have an 01 z with a 4.00 stroker kit / cnc head / comp cam 605 / 609 112 lsa.. car is making 542 rwhp and 496 torque..

i dont get no more than 9-10 mpg..
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Old Aug 18, 2009 | 10:38 AM
  #67  
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Originally Posted by 0Stealth0
Do you need to remove the pistons to have them flycut or can someone come out and do it while they are in the block? And does this make them "weaker"?
No you don't have to remove the pistons. They can be cut in the block. Yes they make them weaker. Just don't take out to much material and on a H/C car it wouldn't be a problem.
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Old Aug 18, 2009 | 11:15 AM
  #68  
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Originally Posted by blakvette
ok i have an 01 z with a 4.00 stroker kit / cnc head / comp cam 605 / 609 112 lsa.. car is making 542 rwhp and 496 torque..

i dont get no more than 9-10 mpg..
Thats all in the tune. Our 8 second C6Z06 get 24 mpg.
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Old Aug 18, 2009 | 01:44 PM
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Originally Posted by Frans96ss
Thats all in the tune. Our 8 second C6Z06 get 24 mpg.
You think you can get that kinda setup with my H/C package?

If so I am coming to you when I get this setup so you can tune it up good
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Old Aug 18, 2009 | 01:53 PM
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Originally Posted by 0Stealth0
You think you can get that kinda setup with my H/C package?

If so I am coming to you when I get this setup so you can tune it up good
Any decent tuner can get you that MPG on a H/C setup.
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Old Aug 19, 2009 | 09:50 PM
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Sounds great then

I have another question. If the heads are milled and lower cc then the stock heads will the fast intake manifold align to the heads without any problem? My neighbor said something about it may not line up because the heads would be closer to the block.

Thanks.
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