Tyler Stipe
New Member
- Joined
- Apr 21, 2017
I've searched all over for ideas and answers on fixing my KR. Cruising it seems just fine, but if I just barely let off the gas, it seems to get some KR, but if I fully let off the gas it jumps to 0 KR.
Also, during boost, I'm getting some serious amounts of KR. I'm running 93 octane with royal purple octane booster, was trying to make sure it wasn't because of low octane, still does it.
Video examples:
This has both deceleration and boost KR
This has just the deceleration KR
Please excuse the crappy video quality, as I was trying to drive and record at the same time.
Here is a list of the mods the previous owner did:
I've had the car about a month now and I've replaced or installed:
Fixed/Repaired shotty/half assed work the previous owner did, finding new stuff every day to fix/repair.
I am not hearing any kind of audible knock. I did just last week put on the 4" single exhaust with Magnaflow straight through muffler. Since then, at about 0 boost, roughly, the car starts vibrating, higher into boost it goes away.
Based on the video, am I running too rich and possibly getting rich knock? Is it most likely false knock from something? It's driving me nuts, I've been looking all over for something possibly banging on the engine somewhere. Downpipe is not hitting anything, plenty of clearance.
I do have a brand new knock sensor in my possession, I have not installed it yet, as I've been reading it's a pain to torque correctly with the engine in the car.
Any suggestions or help would be much appreciated.
I will continue to browse google and these forums for possible solutions.
Thanks!
Also, during boost, I'm getting some serious amounts of KR. I'm running 93 octane with royal purple octane booster, was trying to make sure it wasn't because of low octane, still does it.
Video examples:
This has both deceleration and boost KR
This has just the deceleration KR
Please excuse the crappy video quality, as I was trying to drive and record at the same time.
Here is a list of the mods the previous owner did:
- Stock 109 block with forged Speed Pro pistons,
- shot-peened rods,
- stock crankshaft,
- steel center main caps.
- Fully balanced and blueprinted by Wildcat performance in Adel Georgia. Factory cylinder heads with 2.02/1.55 valves and light port and bowl work. Autolite 23 spark plugs gapped at .035. Precision Turbo 6766 journal bearing turbocharger.
- GN1 headers and 3.5 inch down pipe. Tubular upper control arms to clear the down pipe.
- LS1 starter.
- 3 inch front mount intercooler
- LS1 MAF and translator.
- Turbotweak chip with Power Logger. Custom 235mm billet 3500 stall single disc lock-up torque converter built by Greg Chomos.
- Turbo Buick to 4L80E adapter. Full billet 4l80E trans built by Kris at CK performance transmissions.
- TCI transmission controller.
- Custom 3 inch steel balanced driveshaft with 1350 u-joints.
- Forged pinion yoke.
- Strange 31 spline axles with full spool and c-clip eliminators.
- 5/8" wheel studs. ARP hardware throughout.
- TA cover with girdle.
- Adjustable upper control arms with solid lowers. ATR rear sway bar.
- Racetronix full kit with twin Aeromotive 340 pumps and new high flow sending unit.
- Setup for the second fuel pump to come on at 15 lbs of boost.
- 42lb injectors.
- Bailey engineering 2-step.
- Devils Own Alcohol injection. AEM Truboost boost controller.
- Autometer wideband O2 gauge.
- Caspers knock gauge.
- Custom 1 piece front chin spoiler. Competition Engineering 3 way adjustable front shocks.
- QA1 15 way adjustable rear shocks.
- Weld Alumastars on the front with Holeshot rears.
I've had the car about a month now and I've replaced or installed:
- TR6 + Coil/Wires from Bob
- Scanmaster G
- Brand New MAF Sensor
- 4" Exhaust
- NKG Plugs, now gapped at .25
- New Rear Coil Springs
Fixed/Repaired shotty/half assed work the previous owner did, finding new stuff every day to fix/repair.
I am not hearing any kind of audible knock. I did just last week put on the 4" single exhaust with Magnaflow straight through muffler. Since then, at about 0 boost, roughly, the car starts vibrating, higher into boost it goes away.
Based on the video, am I running too rich and possibly getting rich knock? Is it most likely false knock from something? It's driving me nuts, I've been looking all over for something possibly banging on the engine somewhere. Downpipe is not hitting anything, plenty of clearance.
I do have a brand new knock sensor in my possession, I have not installed it yet, as I've been reading it's a pain to torque correctly with the engine in the car.
Any suggestions or help would be much appreciated.
I will continue to browse google and these forums for possible solutions.
Thanks!
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