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testing for knock

9

96brougham13

New member
i need to test my new modded 1997 gtp for knock to see if its actually running this 3.0" sc pulley right.

not sure whats exactly done but..

very large cam
3" exhaust
headers
3.0" pulley
some sort of pcm tune
valve train to match cam
larger injectors not sure on # (how can i determine what injectors i have?)

trying to figure out what has been done and if its going to blow.

how can i test for kr without spending a fortune. does caspers knock gauge work. I would like to really know numbers tho not just a couple led lights.

If anyone lives around the st. cloud MN area with a scanner that would be pretty cool but seems far fetched
 


Im with ya man, I bought one from the dealership and thought it was stock besides the CAI. Thats not the case. It has been modded. Im wondering how to find out about the internals as well, like cam, rockers, shift kit. How can you tell without ripping it apart?
 
KeithGTP03 said:
Im with ya man, I bought one from the dealership and thought it was stock besides the CAI. Thats not the case. It has been modded. Im wondering how to find out about the internals as well, like cam, rockers, shift kit. How can you tell without ripping it apart?
Click to expand...

you dont.
 
mnclubgp.com should have a few people near you with scanners or know the history of the car if it was purchased in mn.
 


KeithGTP03 said:
Im with ya man, I bought one from the dealership and thought it was stock besides the CAI. Thats not the case. It has been modded. Im wondering how to find out about the internals as well, like cam, rockers, shift kit. How can you tell without ripping it apart?
Click to expand...

Upgraded rockers minus modded 1.9's you can tell by taking off the oil cap and looking at them. A cam will idle rougher than stock...even a VS feels like a misfire.
 
thanks for the info.

nascartech...was his car black with tan interior with larger drilled rotors up front? I bought it form a guy in duluth and im not sure who he bought it from but thats who did all the work.

you can tell right away it has quite a lot of cam lift. I know the pcm has been tuned too cause the fans stay on for a min. or so after you shut off the car
 
ya i have the numbers. its a custom ground cam from comp cams. Intake lift is .556 and exhaust lift is .564. i do have some other numbers too.
 


ya im not sure he just said it was custom ground from comp cams. Grind # GM38 3314/3315 HR113.0. All i really want to do is get it scanned for knock to make sure everything is good
 


i do have 2 bigger pulleys a 3.2 and a 3.4 i think. I just going to try and get my uncle to barrow his scan tool from the shop he works at.
 
if its got the headers,cam, and bigger injecters than the 3.0 should be fine since you said it had some kind of tune on it... if its nocking its very little...
 
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