When I first started dragging my 87 LX,I went from a 14.20 first pass to a 13.56 with out changing a thing. I learned to drive the car. Played with shift points,launch rpm to see what it liked. Set of slicks and the car ran 13.20. So,years ago a buddy did a HCI swap on his lx,and the car just wasnt running the numbers it should. He wanted me to drive it,and I warned him I would not be nice to it. I got in,set the seat up so I wasn't gangster leaning and proceeded to rip off a pass that was 6TENTHS faster than he ever went. Driving skill can make a BIG difference in the times a car will run.
Horse Power Gains?
- Thread starter 93gtmustang
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- Oct 21, 2006
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I just got my car back. I sold it back in 2016 for my daughters college payments. So I'm not throwing a bunch of stuff at it. Yes I do know that the injectors don't make more power. Never dyno, or computer tune. I raced in Pro E.T bracket racing alot for 7 years. It's not that important to me to run in the 12's, it is bracket racing. It's how good you are, not how fast. It would be cool to get into the 12's, I wouldn't complain. The car would always run 13.1 to 13.3 depending on conditions, no matter what you did to it . Launch, shift point etc... The person I bought it back from put skinnys on the front, and got rid of the full exhaust. The exhaust is no cats now, just h-pipe to slp mufflers. So it will probably pick up some from when I had it. I threw my piles of time slips out when I sold it. I think there's an old one on here I'll try to find it. I totally agree. I'm not throwing a bunch of parts and money into it. That was what my original question was about. The guy at the track saying F-cam, 30#injectors, track heat intake is going to give me these big gains. I don't believe it.
I'm just going to have fun racing with it for a few years the way it is. When the time comes to go faster, it will be a totally different engine build, C-4 trans. High 10 second to mid 11 car. Thanks!
- Oct 21, 2006
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I use to launch at about 4500 rpm. shift light set 5600 rpm . trap rpm was higher than 5600. not sure exact number . shift light would come on before the finish line. guesiing 5800-5900?
- Oct 21, 2006
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- Oct 21, 2006
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OK. Here's a time slip I found on here from 2007. I believe the rings had finally started to seat in the new crate motor I had bought.
Reaction........ .094
60'................ 1.889
330'.............. 5.531
MPH1............81.73
660'.............. 8.581
1000'.............. 11.204
MPH2............ 102.19
1320'............ 13.417
From then on. I would dial 13.2-13.3 range. Thats what it always ran. Full interior car, no weight reduction.
Reaction........ .094
60'................ 1.889
330'.............. 5.531
MPH1............81.73
660'.............. 8.581
1000'.............. 11.204
MPH2............ 102.19
1320'............ 13.417
From then on. I would dial 13.2-13.3 range. Thats what it always ran. Full interior car, no weight reduction.
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- Oct 21, 2006
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1/4 Mile ET Calculator (robrobinette.com)
So this is pretty cool !!!
I did 3250 vehicle weight, 345 horse power flywheel.
I should be 12.94 e.t. for the quarter mile. It also says trap mph 111 mph. My car will never trap that mph with the 4:30 gears in the rear.
So this is pretty cool !!!
I did 3250 vehicle weight, 345 horse power flywheel.
I should be 12.94 e.t. for the quarter mile. It also says trap mph 111 mph. My car will never trap that mph with the 4:30 gears in the rear.
- Oct 21, 2006
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Yes pretty much. 26x9.5 Hoosier Quick Time Pro Bias slick for dot racing. Yeah thats an old time slip. It was when I had 3:73 gears. It bogged bad. When I switch to 4:30 gear it would 60 ft 1.76 to 1.8.
I skimmed through this thread and probably missed some stuff but....
The only thing I'd add to this combo is boost, fuel, and tune. {Any} amount of boost is going to make this combo say hello. Yeah, the B-cam is a bit out of date but responds very well to boost.
It would probably scare the
of you until you got the suspension reeled in. 
- Oct 21, 2006
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Thanks! I've looked into superchargers for sure! How could the stock bottom end take was my concern.I skimmed through this thread and probably missed some stuff but....
The only thing I'd add to this combo is boost, fuel, and tune. {Any} amount of boost is going to make this combo say hello. Yeah, the B-cam is a bit out of date but responds very well to boost.
It would probably scare the
I think a kit from Vortec averages for about $3500.00. I think I can get a beefed up Ford Racing or Dart 347 bottom end for that price. And then supercharge that latter on! Well thats a little ways down the road!
That's certainly an option, however, the SC can be used on either/both.
400+ RWHP in these little cars will take you some time and money to get under control chassis/suspension-wise.
You’re 15-2000 shy of a dart or boss short block. Things aren’t cheap these days
- Oct 21, 2006
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I must have been living in a cave! $5100.00 for the Boss short block. It use to be $3500.00
Maybe a 4.10 gear would get you through the traps at a slightly lower rpm to where you're still pulling in 4th gear and trap in the low-mid 5k rpm range? I doubt you're still accelerating much at 5,800 rpms.
- Oct 21, 2006
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I had 3:73's which worked great with the original T-5 transmission( 3:35 first gear) I then got a T-5z because the other transmission had issues. The T-5z has a 2:95 first gear and it bogged bad. I was going to go with the 4:10's, but my mechanic said I really wouldn't feel the difference. And to go with the 4:30's that I have now, and if they were to tall of a ratio, I could run a taller tire to compensate. He was a former drag racer. I wish he was still in business. He use to give such great prices on any work on the car. Looking ahead, I would eventually like to get c-clip eliminators, spool, and at that time, I would have 4:10's put in.
Thank you!
- Oct 21, 2006
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Did 2 runs last weekend trying to be consistent, not for fastest run, for up coming bracket racing events.
My tach will give me peak rpm. It was 6200 and 6250 rpm. Close to the fuel shut off.
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- Oct 21, 2006
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Boostedpimp
Dirt-Old 20+Year Member
You should be in the 12's now and the combo your fellow racer mentioned probably wouldn't gain you anything over your current setup. What rear tires? play with the tire pressure a bit, unbolt one side of your front swaybar for more weight transfer while at the track and practice.
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