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well i went to the track friday night after installing 4.10s and truetrack from 3.23s and the best i got with the 3.23s was 15.6 and now with the 4.10s was a 15.5 is this right? and also when it hits 3rd at about 84mph it starts to vibirate whats going on?
Pinion angle might be off, or gears might set differently. Send me your 1/4 mile info and I will get you on the list
What are the 60' and 18th mile times?
hmmm... idk but i did a 15.6 with my stock gears and longtubes and tune....no stall or cam...im getting 4.10's next month... hope I see a little more than that.....Good luck on figuring it out!
Did you run the 15.6 in good weather? I have seen times drop by as much as a full second between the 105* Texas heat and a nice 50* night with low humidity.
The vibration thing is a huge issue. I know it killed me and my 60' times. I'm still chasing down a vibration in my driveline at about 5-10 mph. It has cost me some pretty good times. I'm trapping as high as 81.x but only cutting 2.15-2.20 60' times even with 26" ET Streets and a ss3600 torque converter.
Yeah, I would guess pinion angle. What was your trap speed?Quote:
Originally Posted by duckysbht
EDIT: BTW the dubs arent helping you any. My 04 with a stock stall, 4.10's, headers, exhaust, and cam ran a 14.7 @ 97. So I would guess the wheels are killing you. And who tuned it?
ya this texas heat currently is killer... made a friends 400hp supra run 14.1's
my truck ran 15 flats when ive seen people with my setup run mid 14s or low 14s
OMG what was your trap speed and 60 ft?Quote:
Originally Posted by Faze2183
my 60ft with 3.23s was 2.4 1/8 ET was 10.1 at 69mph 1/4 was 15.6 at 89mph and with the 4.10s my best was 60ft 2.3 1/8 9.9 at 70mph 1/4 15.5 at 86mph.both times its probly been in the uper 80's degrees. and as far as the vibirations is that because the driveshaft is spinning a lot faster then it used too? thanks for all the input so far.
60 ft is the main culprit, but you should be in the mid 90's mph for your 1/4.Quote:
Originally Posted by Oldblue5.3
The vibration is probably the pinion angle. When you installed the new gears maybe the pinion angle was off a bit. Or maybe the gears werent set up right. You need a live tune. And runs without dubs. that weather is not that bad.
next time you race, Brake stall at the line and spin the tires a tad when you take off. IMO its better to spin out of the hole than to bog. With the stock stall your bogging.
with your mods, your ET and MPH are off.
Who tuned the truck?
Agree.
The minimal gain in short times is probably better leverage of the gears vs. worse traction but laying over up top is a problem as is the vibration.
Where are you shifting it?
Ditch the double dueces......
Have u got a tune, man w/ that cam, stall & gear u should putting down some good times. I'm running a LS1 218/500 cam w/ stock trans and convertor w/ 373's. and Running mid 14's on motor..
the cam and stall were installed by texas speed and performance the gears i installed myself but it was all tuned by texas speed i dont know really when it shifts but i know when it hit 3rd it starts to vibrate i think its rite at 80mph. do yall think the times and the vibration have to do wit the gears?
if you're in third gear at 80, what rpm are you at? That is the RPM you need to have the driveshaft balanced at. If your local shop can't do it, find one that can. Also, see how much slip yoke engagement you have. Your slip yoke should not have more than 1" of slide before it bottoms out, otherwise it can wobble on the splines and cause an imbalance. Also be sure your tires are balanced at the speed in question, if possible. Most shops don't have adjustable speed balancers for tires.
Mine shifts to 3rd at 5900 near 80 and I have about the same height tire combo so it's close to what it should be.
I ran 15.88 with just shorties, cai, catback and fast flash programmer.. I have the same cam, stall & gears as you do now, will be getting times soon and will let you know how I do..
sorry bout the bad luck man, real quick how long did you drive on those new gears before hittin the track and how long before you went and hammered on it?, suprised this hasnt been asked yet.
I put about 100 miles before I hit the track and gave it about 5 heat cycles before I got on it
but still took it easy
ok, thats what i was wondering.
For once, it's the tune causing everything:lol:
J/K. I don't know jack crap... don't listen to a word I say
definately sounds like a driveline component, Now that its spinning faster its noticeable to where before it wasn't. X2 take it out and get it balanced..
i went from 3:07s to 4:56s same drop kit same everything started getting NASTY vibrations at 80mph. put a 4 degree pinion shim in due to my flip kit i can do about 115 or so now before its a problem it has something to do with the pinion angle im guessing for you as well. i think the change in the speed of the driveshaft rotation makes it really noticeable that the pinion is off. my vibrations are nasty nast nasty scares me pretty good.Quote:
Originally Posted by Oldblue5.3
1 would go with a 3400 multi disk vigilante restall and get a built drive shaft with the pinion angle done to the truck and change the 22s for something lighter.good luck bro.
i dont really have a drop kit on it except for the shackles i put on it when it was new and i just recently did all these mods so i really dont have the mulla to change out anything.but just asking what is the differance between that stall and the one i have except the stall speed?
First of all... Scrap the 22's and you'll see a considerable time difference. They probably weight 100 lbs a peice. you have to think about the rotating weight on wheels and tires. Also, How loose is the stall you have now??? How many rpms can you foot brake your stall to now/what do the rpms flash to without foot braking? Good luck man keep us posted
if i brake stall it goes to 2800 rpm i have'nt seen were it flashes too when i just punch it.as far as the 22s go they way 87lbs and the stalk steel ones 77lbs
were your before times on your lighter wheel/tire setup? or were both runs on the 22's?
both runs were on my 22s i wanted too put slicks on the stalk ones but i think i need to look into a lighter set.
Hate to burst your bubble but all I did was .2 better with the same swap. I too was dissapointed but thats about the diff I got. And ditch the 22's for al. rims and slicks and watch the times drop! :)
that vibration needs to be addressed before anything else tho, or you WILL be spending more mulla