I need some help determining possible causes for detonation that is occurring.
I have an 87 GN and when I bought the car it was completely stock except for the air filter and exhaust. I hooked up a scan master and noticed that I could never go past 3/4 throttle without the scan master showing some knock. (Max 12.9 deg) So i tried not build any boost while I was driving.
NOW,
I just got done installing a walbro pump w/ hotwire kit, 42lb injectors W/ matched chip and an adjustable FPR all from turbo tweak. I also installed the RJC power plate hoping that all of this would fix my original problem.
Took it for a ride after setting the fuel pressure to 43lbs with the line off which dropped to 39lbs with the line on. Was able to go WOT until about around 50 mph and then you could hear it start to detonate all of a sudden. Got off the gas asap. Scanmaster showed 19.9 degrees.
I use Sunoco 93 and the chip is programmed for 93 as well as matched with the new injectors. Don't really have any of the other scan master readings but can get them. Just let me know which readings are needed. Any tips or help solving this problem would be great. I don't plan to be racing this car or doing that much more modifying, but need it to run 100%
Thanks!
-Mike
I have an 87 GN and when I bought the car it was completely stock except for the air filter and exhaust. I hooked up a scan master and noticed that I could never go past 3/4 throttle without the scan master showing some knock. (Max 12.9 deg) So i tried not build any boost while I was driving.
NOW,
I just got done installing a walbro pump w/ hotwire kit, 42lb injectors W/ matched chip and an adjustable FPR all from turbo tweak. I also installed the RJC power plate hoping that all of this would fix my original problem.
Took it for a ride after setting the fuel pressure to 43lbs with the line off which dropped to 39lbs with the line on. Was able to go WOT until about around 50 mph and then you could hear it start to detonate all of a sudden. Got off the gas asap. Scanmaster showed 19.9 degrees.
I use Sunoco 93 and the chip is programmed for 93 as well as matched with the new injectors. Don't really have any of the other scan master readings but can get them. Just let me know which readings are needed. Any tips or help solving this problem would be great. I don't plan to be racing this car or doing that much more modifying, but need it to run 100%
Thanks!
-Mike