needing more info on 285lr hr13 cam
Thread Starter
On The Tree
Joined: Jan 2013
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needing more info on 285lr hr13 cam 1989 mustang. im running a 285lr hr13 comp cam in my 5.3 with PRC dual spring rated up to .650 lift and 7.400 comp cam chromoly pushrods. virgin 706 heads. 3200 circle d stall. level 3 4l60e build. 2.5 inch H-pipe with flowmaster 40s dumped before the axle.
I can't seem to get it to idle properly. my tuner says to open the throttle blade to about 5% so that it can idle but then others tell me that the tuner needs to control the idle.
I can't seem to get it to idle properly. my tuner says to open the throttle blade to about 5% so that it can idle but then others tell me that the tuner needs to control the idle.
Thread Starter
On The Tree
Joined: Jan 2013
Posts: 135
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Correct me if i'm wrong but i was also suggested to move the MAF as far away as possible from the TB. I have it bolted on directly to the TB right now.
That cam has 13* overlap, it's not going to be very driveable. And your 3200 TC is to low, you need a 4000 stall. What's the idle speed at? As it needs to be 950-1000 rpm.
Good luck tuning that one. I took out a 234/242 114 cam that had 10* overlap because I got tired of the low rpm/light throttle surge/fishbite. Since I have a manual trans, it would be less noticeable with a auto trans. I now have a 234/242/117+2 cam that has 4* overlap. The car drives 10x better, still has stupid bottom end, and gained mid range to top end power due to the earlier exhaust valve opening. I like my car again.
Russ Kemp
Good luck tuning that one. I took out a 234/242 114 cam that had 10* overlap because I got tired of the low rpm/light throttle surge/fishbite. Since I have a manual trans, it would be less noticeable with a auto trans. I now have a 234/242/117+2 cam that has 4* overlap. The car drives 10x better, still has stupid bottom end, and gained mid range to top end power due to the earlier exhaust valve opening. I like my car again.
Russ Kemp
