12 second pass (other thread got me thinking)??

[bn69stang]

Well i think the gears will help you , and you could do some research on your leaf springs if they are a 4 leaf pack go to a 5 leaf pack with the mid eye . Mid eye will drop the rear of the car approx 1 inch , will help with weight transfer and maybe look at the shelby under rider traction bars , they re retro looking and really work for both traction and wheel hop . And 3.89 or 4.11 would work well with your stuff , and remember the 68 1/2 cj mustangs ran in the 13 s , lighter car and different trans gear .. and you need to check fuel pressure for sure , and maybe even look at the sock on your fuel pick up/ float make sure it s 3/8 inch and not clogged at all ..Bud

[Ratbird]

When I had a 390 in my 59 T-bird it got axle wrap bad, especially when I power shifted 2nd gear. I took the springs off and had a shop in Albuquerque re-tension them and add a leaf. Sits nice and level now. Haven't had a problem since. I'm not sure if that saved me any weight though, going with traction bars might have been lighter.
It gave me a little higher stance in the back too. From what you guys are saying that's not a good thing?

In April I plan to take it to the Albuq. dragway and see what it runs. Most likely be a big learning curve for me. I'll try to post a video of a test run in the next couple of weeks.

Dave J 

[My427stang]

Chilly, I think you need gear and traction to get it a little faster

I believe that T10 is a 2.64 1st x 3.50 = 9.25:1 SLR

For what its worth, I run 2.87 x 4.11 = 11.79 SLR and I probably wouldnt go under 11-ish.

That's 27% more gear in 1st gear.  if you had it, odds are the one legger would just smoke the tires, but with traction it'd get out of the hole and run through 2nd a lot quicker

Needless to say if it's taller than that, it's even worse.

I bet a set of 3.89s or 4.10s, with a posi and a set of Traction Masters would really make it jump even with the small cam

[chilly460]

Thanks again all for the info.  I originally had 3.00s in it and the jump to 3.50 made a huge difference, imagine 4.10s would be another big gain.   I do drive it quite a bit though, hesitant to run the steep gear, but may talk myself into it. 

I did put an extra leaf in it out of a spare Galaxie leaf pack and clamped it in the front of the spring, still get a ton of wrap.  I'll probably just put slapper bars on it for now. 

Lots to think about, easy to go down the path of changing a bunch of crap on this car and still have a car that will get destroyed by stock late models and kill the driveability....

Ross, found reference that it's a 2.36 first, even worse.....

[fairlaniac]

      I was just wondering where the fe reunion will be held in April , I'm a big fe fan and if at all possible would love to go

Beaver Springs Dragway - Beaver Springs, PA April 25 & 26. See here for more info http://www.fairlanet.com

We hope to see you there!

[chilly460]

Revisiting this old thread, tail between legs 

Car ran 92mph, missed third, passenger in car, shifting at 5500rpm.  Not very good data, too many variables. 

I put a 4.10 open rear in it and slapper bars, it does NOT spin on the street, or at the track...with the open gear.  Sad.  I basically slipped it a little then nailed it, and it fell on it's face, 2.5 60ft.  It pulls fine if you punch it at 2000rpm, first thought is my pump shot is way off.  Feels a little flat up top, better than it was.  I will say, feels MUCH better with the 4.10s as you'd expect it to. 

So, it's a turd right now.  Have three day weekend coming up.  I can't trust my wideband right now, so unfortunately that's out.  Going to try:

1) Blue cam on primary side
2) Blue cam on secondary if it likes it on primary
3) Run fuel pressure gauge to windshield
4) Put 2* more timing initial

Just seat of pants for now, called local dyno guy that I like and he was booked, will see him soon.   

[jayb]

Seems like first time out its always like that.  I think you're probably right about the pump shot.  A little carb tuning will make a world of difference.

[fastback 427]

First time out with a new combo doesn't mean much to me, like you said too many variables. There's an easy half second to be had in the 60 ft with a tune and better technique. Also MPH seems a little low to me. 100 would be closer to where your at. Fuel pressure gauge is a good idea. Keep playing with the tune and something will turn up. First time I took my stang to the track I ran a 9.30 1/8 mile. Got beat by a Jr. Dragster. Haha. No traction at all. Damn near hit the cone at the end. It took a couple years, gears, cal-tracs,  fuel system and some tuning to drop it over 2 seconds. My bud Josh has a pro street 69 montego with a very mild 351 c. First time out ran 9.80. With gears, 4500 stall and lots of tuning he runs 7.80 at 86. 1/4 mile is 12.09 at 109. Don't be disappointed till you get the issues ironed out, good luck!

[chilly460]

Thanks, I knew there would be teething problems so this is just part of the process.  I agree with you, think the combo is capable of 100mph trap.  I wish I had traction problems at this point

It's just a street car so to be honest, not so much concerned with ETs as just getting it to feel strong throughout the powerband right now.  I will start working through systematically this weekend and report back, good info from you guys so far is appreciated. 

[Ratbird]

I can relate, same thing happened to me on my first trip to the track.
I will say that going from a close ratio to a wide ratio (with a David Kee kit) made a huge difference in my hole shot. Your SLR of 9.7 is probably hurting you as much as anything.   

[chilly460]

I'd love to do same but it's a T10.  I am mulling over putting a 5spd in it over the winter which would be a big improvement at launch, not to mention cruise. 

For now, try to improve what I have and see how she does.

[Ratbird]

Ah, that's right. I forgot that.
Wish I would have done it your way and gone with the 5 speed also - I would saved a lot of money over the way I'm going.

dave

[chilly460]

Alright, start of baseline today.  Drove it around, car pulls clean at part throttle normal driving, any rpm...it'll pull 1500rpm in fourth without bucking.  However, if you go WOT in 1st or 2nd, it doesn't pop or bog really, it's just "flat" feeling, doesn't wind up...but then it's like a light switch at 3000rpm, it changes tone, and takes off. 

So, I'm waiting for it to cool a bit.  Just to check, I'm going to get a static CR reading.  Then thinking lighter advance spring as it comes in around 2800rpm, which jives with where it starts running better?  I'm going to mess with squirter since it's easy, but it doesn't really bog or pop, so I don't necessarily see this as the issue. 

Could be power valve?  Seems that could be why it picks up at 3000rpm when velocity picks up and it starts pulling more through main circuit? 

Will get some data and check back in. 

[chilly460]

Cylinders 1-4 show 165psi or so with engine warm, cranking three revolutions, throttle open.  If I keep cranking, 180psi or so.  Doing research now, but with some research seems ok for a 9.5:1 nominal, 270H (106lca) setup? 

[bartlett]

Imo if your going to drag race and or play with jetting/ squirters sizes ect buy a lc-1 / air fuel gauge kit .... there like $150 and will make your life WAY better.....