Well made it up to the dyno Friday night. Didn’t go as good as I thought. I started off by on the way to the dyno my car developed a new vibration. Of course it ended up being a u joint. So after putting two new u joints in, on the dyno we went.
After a few pulls and doing a little air fuel tuning I was only at about 340 RWHP. I should be between 400 and 500. My car is 87 turbo t. Some things I have done to it is Walbor fuel pump & hot wiring kit, Blue top inj., adjustable fuel regulator, PT51 turbo with 2800 to 3000 stall, 3 in down pipe running with open collector, stock heads that have been ported big, comp cam 212/212 cam, K&N, Jay Carter 100 Octane race chip, running 21 to 22 pounds off boost.
On Sat. we ran it again, but we were at about 390 RWHP. My problem is that the Hp and Trq are climbing and all of a sudent they drop like a ton of ••••. They don’t just smooth out. We think its some thing to do with the timing. Like it get to a point and then the computer tells it retard the timing. It s not the chip because we tried about four other chips and they all did the same thing. We tried unplugging the knock sensor which didn’t change a thing (didn’t even throw a engine light). And we plug the vacuum line that goes the map sensor , nothing changed. If any one has any ideas please help. I’m going back to the dyno next weekend. I’m having a guy come up with a lab top to see if he can help.
After a few pulls and doing a little air fuel tuning I was only at about 340 RWHP. I should be between 400 and 500. My car is 87 turbo t. Some things I have done to it is Walbor fuel pump & hot wiring kit, Blue top inj., adjustable fuel regulator, PT51 turbo with 2800 to 3000 stall, 3 in down pipe running with open collector, stock heads that have been ported big, comp cam 212/212 cam, K&N, Jay Carter 100 Octane race chip, running 21 to 22 pounds off boost.
On Sat. we ran it again, but we were at about 390 RWHP. My problem is that the Hp and Trq are climbing and all of a sudent they drop like a ton of ••••. They don’t just smooth out. We think its some thing to do with the timing. Like it get to a point and then the computer tells it retard the timing. It s not the chip because we tried about four other chips and they all did the same thing. We tried unplugging the knock sensor which didn’t change a thing (didn’t even throw a engine light). And we plug the vacuum line that goes the map sensor , nothing changed. If any one has any ideas please help. I’m going back to the dyno next weekend. I’m having a guy come up with a lab top to see if he can help.
so assuming that i add 4 more psi 2 more degress of timing it should have made more power and torque but it didn't.
