2017 ZL1 Compression Test

LiqTenExp · 04-09-2023, 03:26 PM

Hey,

I try to do a compression test at the beginning of the season and appear to have pretty good results for a 6 year old car that has been modified for 5 years (250+ whp).

The min to max was within 3-4% across the cylinders and values that make sense for an LT4 with stock compression ratio (even with a cam). This was done hot after completely warming the car to a stabilized 200°F EOT, testing ended around 170°F at the completion of test.

Was considering either a built bottom end or upgrading the 2300 to 2650, looks like that latter wouldn't be a bad idea based on results.

Joshinator99 · 04-09-2023, 05:02 PM

Quote:

Originally Posted by LiqTenExp

Hey,

I try to do a compression test at the beginning of the season and appear to have pretty good results for a 6 year old car that has been modified for 5 years (250+ whp).

The min to max was within 3-4% across the cylinders and values that make sense for an LT4 with stock compression ratio (even with a cam). This was done hot after completely warming the car to a stabilized 200°F EOT, testing ended around 170°F at the completion of test.

Was considering either a built bottom end or upgrading the 2300 to 2650, looks like that latter wouldn't be a bad idea based on results.

Those results looks really good to me! Guess you’re not abusing it enough.

LiqTenExp · 04-09-2023, 05:05 PM

Quote:

Originally Posted by Joshinator99

Those results looks really good to me! Guess you’re not abusing it enough.

How's that 3.0 whipple? I'm concerned with the quality of whipple vs. magnuson and haven't done enough research on 3.0 whipple vs 2650 results.

*radz28* · 04-10-2023, 09:08 AM

It's my understanding those are good numbers. TURN THE WICK UP!!!

Joshinator99 · 04-10-2023, 12:04 PM

Quote:

Originally Posted by LiqTenExp

How's that 3.0 whipple? I'm concerned with the quality of whipple vs. magnuson and haven't done enough research on 3.0 whipple vs 2650 results.

It looks nice sitting on my motor…

Hoping to button up the details (Katech designing TB plate for 112mm TB, Smoothboost bracket prototype, etc) soon and get in a dyno before end of the month.

04-09-2023, 03:26 PM	#1
LiqTenExp Drives: 2017 ZL1 Join Date: Jan 2017 Location: NJ Posts: 905	2017 ZL1 Compression Test Hey, I try to do a compression test at the beginning of the season and appear to have pretty good results for a 6 year old car that has been modified for 5 years (250+ whp). The min to max was within 3-4% across the cylinders and values that make sense for an LT4 with stock compression ratio (even with a cam). This was done hot after completely warming the car to a stabilized 200°F EOT, testing ended around 170°F at the completion of test. Was considering either a built bottom end or upgrading the 2300 to 2650, looks like that latter wouldn't be a bad idea based on results. Attached Images __________________ 2017 Camaro ZL1 Coupe M6 (847whp Dynojet on 93)

04-10-2023, 09:08 AM	#4
radz28 Petro-sexual Drives: Ultra-Grin Join Date: Oct 2006 Location: Crazy Coast Posts: 15,201 View My Garage	It's my understanding those are good numbers. TURN THE WICK UP!!! __________________ '20 ZL1 Black "Fury" A10, PDR, Exposed CF Extractor Magnuson Magnum DI TVS2650R // RFBG // Soler 103 // TooHighPSI Port Injection // THPSI Billet Lid // FF // Katech Drop-In // PLM Heat Exchanger // ZLE Cradle bushings // BMR Chassis-Suspension Stuff // aFe Bars // Diode Dynamics LEDs // ACS Composites Guards // CF Dash // Aeroforce // tint // other stuffs

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