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post #1 of 15 (permalink) Old 06-08-2016, 06:57 AM Thread Starter
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Compression Specs for LAP 2.2 Ecotec?

I'm getting pretty close to pulling the trigger on a supercharger kit, but want to check compression first. I've been Googling this for a while, but I've found varying answers between 120 psi all the way up to 225 psi. Does anyone know what the "perfect/factory" range is, and the "still healthy" range is?


Trying to get all the "tags" for anyone trying to Google this info in the future:
2.2l LAP Ecotec Compression specs specifications


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post #2 of 15 (permalink) Old 06-09-2016, 09:35 AM Thread Starter
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I found a thread on a Chevy HHR forum that claims between 155 and 180 psi and no more than a 70% variation between the highest and lowest cylinders for the 2.0/2.2/2.4 Ecotec engines.

Anyone know where to find GM's specs?

Chevy HHR Source


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post #3 of 15 (permalink) Old 06-09-2016, 02:43 PM
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Seems rather low ? Wouldn't 200-210 PSI be the norm ?
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post #4 of 15 (permalink) Old 06-09-2016, 02:46 PM Thread Starter
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Well, after doing more research, I realized that it's dependent on your elevation. The higher the elevation, the lower the PSI, soooooo, I don't know how you'd make a standard "200 psi is the correct number." This makes me think it's more about the difference across cylinders rather than the actual psi reading.

I saw a video of a guy testing a Cobalt who hit like 200 or 210 psi, but I have no idea if he was at sea level, or thousands of feet above it.


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post #5 of 15 (permalink) Old 06-10-2016, 08:57 AM
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I know that my old Civic with a D16Y7 got 190PSI across the board when I tested it, and a friend of mine with a Civic Si-R with a B16B got 210PSI which he says is basically the textbook specs.

We're at 120ft ASL if that matters.
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post #6 of 15 (permalink) Old 06-10-2016, 09:24 AM
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Somewhere around 180-200+ is probably in the perfectly fine range. Mainly, they just want to all be about the same.

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post #7 of 15 (permalink) Old 06-10-2016, 05:58 PM Thread Starter
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I'm at 1200 feet above sea level and got just a hair over 180 across the board. Might be 1 or 2 psi difference between the highest and lowest, so it's looking good!

Gonna get the SC kit tomorrow after I throw some cash in the bank. Sold my GTX 980 Ti for $475, for a $25 profit. Prepping for a GTX 1070 next month, but the timing works out well for having enough cash to get the kit!


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post #8 of 15 (permalink) Old 06-10-2016, 11:47 PM
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Quote:
Originally Posted by Parthros View Post
I'm at 1200 feet above sea level and got just a hair over 180 across the board. Might be 1 or 2 psi difference between the highest and lowest, so it's looking good!

Gonna get the SC kit tomorrow after I throw some cash in the bank. Sold my GTX 980 Ti for $475, for a $25 profit. Prepping for a GTX 1070 next month, but the timing works out well for having enough cash to get the kit!
You'll make money on that transaction anyway - the GTX 10XX series is cheaper and better at the same time.

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post #9 of 15 (permalink) Old 06-11-2016, 05:39 PM Thread Starter
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I had the EVGA GTX 980 Ti SC which actually performs better than the reference 1070, but I doubt I'll even notice the difference.

Shoot, the fact that it's max power draw is 100 watts less than the 980 Ti is reason enough for me to upgrade. I got lucky making $25 on selling my Ti, and it'll be nice to have a cooler, more power efficient card.


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post #10 of 15 (permalink) Old 06-12-2016, 03:45 AM
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Or join the good side of the Force and go AMD ;)

The RX 400 series is looking amazing so far ! Can't wait to upgrade my R9 290 :D

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