A follow up to my original post...http://www.turbobuick.com/forums/ti...1049-what-would-cause-my-trap-speed-drop.html
Figured tonight I'd head to the track, reduce some fuel (falls on it's face at the line) and see if I couldn't perhaps do a little better than before.
Not this time.
First run out was 12.90 at 105.59 mph. Poor 2.02 60 ft. No spinning off the line. All I did before I made this initial run was change the 1st gear fuel setting on the powerlogger (I have the TT 5.7 chip and the latest version of the powerlogger) and change 1st gear fueling from the default 128 to 126.
Next try was to reduce fuel down to 124 on the second parameter. Lined up at the tree. Clicked off a 13.25 at 105.58 mph with a 2.37 60 ft. I don't know what the hell happened here.
Anyways back to the pits, dropped the WOT gear down to 127 from 128, lined up at the tree. now the damn thing won't hold boost at the line for some reason a.k.a. I brake boost to 10 psi at the tree and the rear brakes can't hold it so it pushes thru the tree. Yes I do have a working line lock and was using it all night. only managed to squeak out a 13.24 at 105.22 mph on a ****ty 2.32 60 ft.
At first I thought maybe the brakes not being able to hold meant I was making a little more power than before, but the trap speed proved me wrong.
Ok so now I decide to drop the tire psi in the M/T ET drag radials from 17 down to 15 hoping for better traction. Well all be darned if I didn't run a 13.11 at...wait...104 mph....
And with a 2.13 60 ft. Damn.
Ok so it's an 85 degree day, I decide to give the car a 1 hr cool down and watch. Some of the others weren't running so well, then it cooled off some and the times started getting better. So after an hr. it's all nice and cool and I go to make another pass, thinking maybe the trap speed will pick up and maybe the e.t. will lower, nope, still in the 105 mph range, only managed to belt out a 13.16 on yet another craptastic 2.19 60 ft.
Now if you want to know, my best pass last summer was 12.61 at 109 on a 2.00 60 ft. So why it's worse now, gets me. I didn't see any crax in the headers, but can you always see crax in the headers with the naked eye? I checked my powerlogger files but it seems (to me) that I'm still running pig rich on launch albeit pulling fuel on 1st gear only and WOT all gears. I have the alky knob set at 6 like I've been told to do, and I've not messed with the pac box at all, Razor said leave the damn thing alone, so the alky turns on initially at 7 psi and on full at 12 psi.
I know my converter is probably really holding me back, but I've read where people made their D5's work with the turbo I have. Engine was rebuilt not by me but someone before Richie Kibler had it, I'm almost sure the valve springs are right. It's not doing any valve float that I can tell.
I'm not sure where else to go from here. I guess I need to ditch the converter and get something that will stall a little higher? Because obviously my attempts at reducing fuel in attempt for better launch, as I have been told will help, have not helped at all.
But anyways it's a real disappointment. Don't think I'm going to bother going back anytime soon, not until i can get this sorted out first. It's even worse I had a co worker there taping it/taking pics. Was hoping I could have a good vid of the car pulling a good time. Well he did get my 12.90 pass but really, that's not worthy of mentioning IMO.
And then on the way home the power steering pump started making a god awful whining noise like it's dying everytime you turn a corner or apply the hydroboost. There's fluid in the reservoir albeit bubbly and somehow the **** made it's way all over the firewall, left control arm, the right side of the master cylinder, there's none on the headers probably b/c that **** was burned off.
Oh well, enough of my venting. I'll leave you with a copy of the time slips. I'll post the powerlogger files shortly.
Figured tonight I'd head to the track, reduce some fuel (falls on it's face at the line) and see if I couldn't perhaps do a little better than before.
Not this time.
First run out was 12.90 at 105.59 mph. Poor 2.02 60 ft. No spinning off the line. All I did before I made this initial run was change the 1st gear fuel setting on the powerlogger (I have the TT 5.7 chip and the latest version of the powerlogger) and change 1st gear fueling from the default 128 to 126.
Next try was to reduce fuel down to 124 on the second parameter. Lined up at the tree. Clicked off a 13.25 at 105.58 mph with a 2.37 60 ft. I don't know what the hell happened here.
Anyways back to the pits, dropped the WOT gear down to 127 from 128, lined up at the tree. now the damn thing won't hold boost at the line for some reason a.k.a. I brake boost to 10 psi at the tree and the rear brakes can't hold it so it pushes thru the tree. Yes I do have a working line lock and was using it all night. only managed to squeak out a 13.24 at 105.22 mph on a ****ty 2.32 60 ft.
At first I thought maybe the brakes not being able to hold meant I was making a little more power than before, but the trap speed proved me wrong.
Ok so now I decide to drop the tire psi in the M/T ET drag radials from 17 down to 15 hoping for better traction. Well all be darned if I didn't run a 13.11 at...wait...104 mph....
And with a 2.13 60 ft. Damn. Ok so it's an 85 degree day, I decide to give the car a 1 hr cool down and watch. Some of the others weren't running so well, then it cooled off some and the times started getting better. So after an hr. it's all nice and cool and I go to make another pass, thinking maybe the trap speed will pick up and maybe the e.t. will lower, nope, still in the 105 mph range, only managed to belt out a 13.16 on yet another craptastic 2.19 60 ft.
Now if you want to know, my best pass last summer was 12.61 at 109 on a 2.00 60 ft. So why it's worse now, gets me. I didn't see any crax in the headers, but can you always see crax in the headers with the naked eye? I checked my powerlogger files but it seems (to me) that I'm still running pig rich on launch albeit pulling fuel on 1st gear only and WOT all gears. I have the alky knob set at 6 like I've been told to do, and I've not messed with the pac box at all, Razor said leave the damn thing alone, so the alky turns on initially at 7 psi and on full at 12 psi.
I know my converter is probably really holding me back, but I've read where people made their D5's work with the turbo I have. Engine was rebuilt not by me but someone before Richie Kibler had it, I'm almost sure the valve springs are right. It's not doing any valve float that I can tell.
I'm not sure where else to go from here. I guess I need to ditch the converter and get something that will stall a little higher? Because obviously my attempts at reducing fuel in attempt for better launch, as I have been told will help, have not helped at all.
But anyways it's a real disappointment. Don't think I'm going to bother going back anytime soon, not until i can get this sorted out first. It's even worse I had a co worker there taping it/taking pics. Was hoping I could have a good vid of the car pulling a good time. Well he did get my 12.90 pass but really, that's not worthy of mentioning IMO.
And then on the way home the power steering pump started making a god awful whining noise like it's dying everytime you turn a corner or apply the hydroboost. There's fluid in the reservoir albeit bubbly and somehow the **** made it's way all over the firewall, left control arm, the right side of the master cylinder, there's none on the headers probably b/c that **** was burned off.
Oh well, enough of my venting. I'll leave you with a copy of the time slips. I'll post the powerlogger files shortly.
