OK, track #'s- time to evaluate!
 

i finally went to track this year in my new to me 90 stang. here are some times i rean. i ran a total of 9 times!!! POOR CAR!
Anyways, I got progressively better with 1/4 mile times as well as launches and mph. here a re a few from worst to best.

14.2
101
2.1

14.0
102
2.2

13.9
102
2.2

13.8
103
2.2

13.5
103
2.1

13.6
103
2.1

13.5
103
2.0

13.7
103
2.1

each take off i spun a little in first and second. more so in first. I shifted quickly from 1 through third and power shifted into 4th each time. the first slow times, i did not bring the rpm's up at all, and spun like crazy. i played with it a little and found that i could bring the rpm's up to about 2 grand and drop the clutch. those were my quickest 60' times. these are on regular street tires with less pressure in them. Now my question is! HOW CAN I GET CONSISTENTLY 13.4 TIMES AND A BEST OF 13.2?? THIS IS WHAT THE CAR HAS DONE BEFORE I BOUGHT IT. ANY THOUGHT ON LAUNCHING TECHNIQUES AND SHIFTING, AND MYTIMES? THANKS!

JIM

drag radials...

how low did you go with the pressure? most street tires will cup in the middle if you go to low.. less tread on the ground..

man, buy an 8.5 slick, and drop the clutch about 5k, your problems will be over, and you will be in the 12's.:p
unless you would rather play around on radials and end up buying expensive control arms that dont even help much?

imo dr's arent worth a dang, all mine did was not hook, break my wallet, and went bald extremely quick.

A set of 26x8.5 m/t's were better investment than dr's.
just make sure your t-5 is in decent shape. i can run a 13.4 on big fat dr's, but whats the point when i can go 13.0 on a little slick?
ok i'll shut up....

tire pressure was at 26 psi. the guy before me ran those times on these street tires. thats why im wondering what i can do to get better times. i started to figure it out towards the end, but i didnt want to keep ragging on her. i plan to buy drag radials my next set of tires in the rear. i dont want slicks cause then i will have to change them all the time and i dont drag too much at the track, just there to have fun and get as low as possible, AND beat my friends 98 z28;)

The previous owner could have had better track conditions when he ran that.
Yea swapping tires is a pain, luckily i can just drive straight to the track on slicks:D (4-5 mi. trip)
you will have to play with timing too, my car runs great advanced to 16, some like 14*, if you can, get the track guys to pour down some vht traction compound, i cut a 1.9 60' on 225 radials, one, and only one time..... heh.
a 1.9 for you would mean real low 13

Tuning, tweaking, and PRACTICE will get you your 13.2's, IMO it's there already, you just have to squeeze it out!

could be a few things. was he using same tires thats on car now?? same weather conditions?? what was you shifting at??
With the mods you have mph should be 104-107 range. did you let car cool of any after you made a run?? air the fronts up to 35-40 psi for less rolloing resistance. what was your 1/8 mile times and mph?? might take you a lil time to see what will work with the car. your in the 13.5's so your close!

he used the same tires that are on the car now. my 1/8 mile time and mph for the 13.5's were 8.8 at 82 and 8.7 at 81. i was shifting from first to 2nd right before red line. the rest i believe i was just past the yellow range. i emailed the previous owner and asked him when he shifted. he told me right after he redlined! maybe i should try that, but i thought i could get VALVE FLOAT? or something. good idea?

I can tell ya all about valve float, if your going to the redline dont worry about that. your 1/8th mph is good, i gone 8.3 1/8th @ 82 mph with slicks, im touching 12's with granny gears in the rear.

[QUOTE]Originally posted by 1jimmy__d
he used the same tires that are on the car now. my 1/8 mile time and mph for the 13.5's were 8.8 at 82 and 8.7 at 81. i was shifting from first to 2nd right before red line. the rest i believe i was just past the yellow range. i emailed the previous owner and asked him when he shifted. he told me right after he redlined! maybe i should try that, but i thought i could get VALVE FLOAT? or something. good idea?

where are you located ?? might help to know the weather conditions. your mph isn't showing alot of hp. even with bad traction you should still make decent mph.

im in ny and it was about 65 degrees out. he lives in new jersey. the car did not sit at all in between the runs i made. i kept the temp no higher than 190 during the wait between runs as well. do you think if i let it cool down in between it will makea difference. the best he has run is a 13.2 at 105- he is very adimant about that as well. he ran 13.4 consistently:(

Keep going higher with the shift point. The valvesprings on the holley heads should be able to handle 6200rpms at least but watch out for the 6250 stock rev limiter. I've got a best of 13.32@105.1 and I needed to go to 6200 rpms to get that MPH (then again, my car is carbureted so my powerband is likely higher). If I drop my shift point to 6000 rpm, my mph drops to less than 103 and at 5800 I get about 102mph.

what happens if i hit the rev limiter? so, maybe i wasnt bringing it up high enough rpm wise. what exactly is short shifting, and do you think it will help me with my times? thanks for all replies. so far i am going to put more pressure in my front tires, keep my rears at 26 psi, and bring rpms up to a little over 6. any other thoughts? how about rpms when taking off. thanks

The rev limiter cuts off fuel momentarily at that rpm making the car fall on its face, ususally blowng your run. Short shifting is when you shift too early, it usually will blow your run too..
Shift it at 6000 and see what happens.

Your trap speed isnt too great for your mods especially considering you are on street tires.

Throw on some slicks launch at 5000 rpms shift at a hair over 6000 and I bet you will run 12.90's @104mph.

ill try it again on street tires. he is very adiment about running 13.2 at 105 best time and 13.4 consistently! maybe i will need to cool down between runs!

with nitrous now!
 

OK, I have nitrous installed now and went to the track last night again! Talk to me about how I can get tot he 12's. I am surprised at the times I pulled off with the nitrous! not much better as you will see. I sprayed most of the time after second gear, some towards the end of second gear. Brought the rpms up to 2 grand and dropped the clutch, power shifted 3rd to 4th each time. I ran street tires again with regular pressure in them. didnt know if there was an air pump close by. Didnt let the car cool down until after the 4th run or so. Here are my times;
** TEMP, 67, humidity, close to 100**

60' 2.2
1/8 8.9 85mph
1/4 13.4 111 mph

60' 2.1
1/8 8.9 86 mph
1/4 13.3 112 mph

60' 2.1
1/8 8.8 85 mph
1/4 13.3 112

60' 2.1
1/8 8.7 86 mph
1/4 13.2 112 mph

RT .721
60' 2.09
1/8 8.8 85 mph
1/4 13.3 110 mph

OK, I know Dr's would help a lot, but I thought I would be able to hit high very low 13's, high 12's on street tires. Any suggestions??? Thanks

Jim

Here is a suggestion. Quit spinning your money away and buy some damn slicks:rolleyes:

Nitrous and street tires equals stang into guard rail I have seen it many times. A new vette smacked the rail 2 weeks ago.

Your trap speed on the juice is good for a 12 flat. So quit racing on street tires and get some slicks then go bust off a 12 flat.

After you get some slicks and launch at 5000 rpms and hit the spray off the line you will be thinking why in the hell was I even messing around with the street tires.

Your 60 foot times are KILLING your ET's. GET SLICKS! ~Brian

could i use the nitrous with DR's off the line? how much would DR's help? i still thought i would be able to get 12's on street tires:mad: i am going to buy Dr's next, what do you think i will run with DR's?

You got 2 options, Nitto's and BFG's. The BFG's are going to hook better but tread life is terrible for street use. Then there's the Nitto 555R. With either tire you're going to have to heat them up really good, the Nitto's MUST be really hot to hook good. End result, if I were you I'd get another set of rear rims and get some MT's and be done with it. Just out of curiousity, what tire are you running now? ~Brian

245/50/16 bf goodrich g-force. what numbers can i see with those DR's you mentioned! what do they "typically" drop in tenths 1/4 mile times to?

drag radials
 

Hey Jim. Your mph is looking pretty strong. But man you need to hook up. Like Dark_5.0 said...& I'm speaking from experience here...launching at 5000rpms with slicks and the nitrous on from a dead stop will make you think you strapped a frickin jet to the back of your car! Seriously. :D My best 60ft. time with an 8.5in. slick is 1.6. So just imagine the potential your car has once you lower that 60ft. time. Drag radials will improve your times a lot. They are usually good for 3-4 tenths off of your quarter mile. Slicks will knock off more like a half a second. If you do a decent burnout you could probably launch at around 3000-3500rpms with the drag radials and it should hook. I'm still a fan of slicks though. Nothing beats them....or MT Streets. They are basically a slick with a few grooves down the middle. I run drag radials on the street and slicks at the track. It only takes about 10 minutes to jack up the car and swap tires. Let us know what you end up with.

Simi-

i think i am going to get DR's when these go completely bald! Any idea how much horsepower my car has with/without nitrous based on my times and mph??

OH, I saw a kid who had a 90 gt with 145000 miles on it completely stock. he is running a 125 dry shot of nitrous and hitting 13.4's on street tires!! think i can put the 125 (fogger) in my car with my set up? Just wondering:D

What pistons do you have?

6.400 pushrods?? is that what your looking for? im not sure:D

Speed-pro, TRW, SRP, JE, Keith Black? Ring any bells?

Heh, that's nothing. I ran my car 33 times at a 4 and a half hour test & tune (Gateway Rocks!). I wasn't worried about cooling my car for the best times. I was just working on my technique and reaction times. I got the third best reaction time of the evening at .004 (After green). Not to mention my newfound confidence in my ability :)

Oh, back to the beating up of your car. Don't worry, if you're on street tires you're not hurting anything too much. Now dumping the clutch at 5k with drag slicks like these clowns are suggesting? Now THAT would make me cringe, Tremec TKO and all! That's just asking to twist a 28 spline into putty.


Speaking of numbers to evaluate. I have a personal best of 14.53 at 99.33mph!! With a trap speed like that you'd think I'd be running 13s! How stubborn are these SN95s anyways?

I'm not quite running a drag suspension with blue tokicos and Steeda sport springs, but still. My best 60' is 2.25 and that run ended up being 14.69 @98.67.

My shifts points are around 5000 because on a dyno run I was making peak power at 4800, on a flakey ignition wire, which I have replaced. My rear tire pressure was 32. Does anyone have any advice for me?

well i know your 60 foot time needs to come down to 2.1 or so. mine are at least that:p

anyways, i am not sure what kind i have. i bought the car as is and it doesnt say in the paperwork i have. if it is something that comes with the holley II kit, then it is probably standard like the opther ones. if not, then i dont have a clue! sorry. what would that help tell you anyways?

any ideas on horsepower with and without nitrous anyone? thanks

jim

just out of curiosity what injectors are you running, as far as the drag radial the 15 inch i have gone high 1.6 60's on a decent track, i have a friend on 17's who cuts consistent high 1.8 low 1.9's with the 275 nittos. it's all in what you prefer. get the car to do what you want on motor then spray it. just my .02

the humidity is killing you... try it with cool dry air..
do you have a bottle pressure guage and a warmer for it? with it being cool out, the pressure might have been low too...

i have 30# injectors and i have a bottle warmer for it, but no gauge. i want 12's with this bit*% on street tires!!!

What tires and tire pressure are you running, Jimmy?

I have Michelin XGT Z4s at 35psi front and 32psi rear. My NON drag suspension isn't helping me, either. Tokico blues and steeda sport springs.

My father in law use to say "Want in one hand and sh** in the other and see which fills up first"
Dude you went from 14.2 to 13.5 thats 7 tenths of a second without changing anything but driving technique ... what does that tell you ???? Practice Practice Practice Practice ... The guy you bought the car from was probably a better driver than you are right now. You want to go to the track first time out and drive like John Force and it just don't work that way! Practice !!!
;) :D

Adam94GT- He is getting advise from people that actually run 12's not clowns. I have over 100 hard launches on my stock axles with no problems.

1jimmy_d- Spraying nitrous on street tires is pretty dumb. Like I said I have seen alot of cars kiss the guard rail doing this. You really should at least use drag radials.

There is a guy that used to frequent this site named Skyman that ran a 13.7 on street tires and mid 12's on slicks.

ok, drag radials it is then:( 245/50/16 g-force tires is what i have now. i do need to learn how to drive it better, maybe i will try slipping the clutch out slowly from about 2500 or so. any thoughts of me throwing the fogger for a 125 shot? think my car can handle it the way it is set up now? OF COURSE I will have the Dr's first:cool:

So THAT's why you beat my 60' times Jimmy. I have all-season tires. hah

launching
 

Adam94GT-
:D That's funny that you call us "clowns" when some of us are running 12s & 11s with slicks on stock axles. Your 14 second timeslips have hardly given you the experience needed to know how stout the '87-'93 Mustang trannys & rearends actually are.
Eventually I may upgrade...but I have no reason to yet. I have well over a 100 launches on 8.5in. drag slicks launching at 6000rpm on motor (any lower makes me bog after the initial launch) and 5000rpms on a 150shot of nitrous. This is all with a stock T5, stock axles with an Auburn. Don't knock it until you try it man. Slicks can really make your car come alive and help get you consistent track times. And you don't need a Tremec trans. just to throw a sticky tire on your car. :rolleyes: :p

jimmy
 

Hey Jim. I answered your post in the Power Adders form about that 125 shot you are thinking about. Definitely get some stickier tires before you even think of upgrading to a bigger shot of the juice. Keep us posted.

If you can promise me my 99mph trap speed car with 28spline axles can stand up to 5k rpm launches on DRs then maybe I'll just try it. ;)

trap speed
 

Not to sound like a punk...but 99mph trap speed isn't anything remarkable. It's not like you are pushing 400+ horsepower or anything. Look at the times and trap speeds in my sig. I average about 106mph trap speeds on motor. Around 116mph on the juice...stock axles on slicks. I've been beating on my car for years now. No problems yet...knock on wood. ;) :D
But seriously...you could really benefit from some slicks. With the power you are putting out there would be no reason to worry about breaking your axles, tranny or diff. Believe me, I know a ton of guys with Mustangs pushing way more power than you still running stock axles on slicks. Just ask around next time you are at the track.

Cool thanks bud. I had underestimated stock axles.