hahahaahaha I went to the track today!!!

SO I went to the track for the first time ever today I didnt do to great i ran a 17.58 booooo! I still had my 20s on so could that made a difference? what are your quarter times?

Yes a taller tire will slow your times down because effectively what you're doing is changing the gear ratio (which directly affects acceleration) a taller tire is just like putting in a numerically smaller gear set although it isn't going to affect it very much. This is all assuming that your 20" tires are taller than the stock tire/wheel combo.

I ran a 16 something with mine last time I took it to race. As long as your tires are the same size as they were with the 15's than it wont change anything. But if they are bigger/smaller it will make a dif.

That and the fact that those 20's probably weight a TON. Put the stock wheels on there next time you go you'll probably shave almost half a second off that time.

Mine will never SEE a quarter mile track or any other track for that matter. It wasnt meant for racing and definitely wasn't set up for it. I have a basic baseline model... so I know better. At least I can make her LOOK real good by the time I'm done!!

LOL nice noel!

how did you launch it? Throttle stab? RPM's up? It makes a difference how you launch 'er.

my reaction time was a 2.45 I dont know if thats good but it was my first time. its an auto so i just stompped it

AHAHAHAHAHA!!!! dude what the hell lol. but u gotta get that R/T down to about 1.9 - 1.8 lol. but if u put back on ur stock wheels ur times will get better.

You should be able to get better than that. You go when the last amber light turns off, not when the green lights up.

Now another thing to launch an auto is to load up the torque converter. Left foot on the brake, right foot on the gas up to around 1500rpm. You don't want to do this while you are waiting for the other guy to stage. Only once the other guy has staged. You'll put a lot of heat into your transmission by doing this which is why I wouldn't suggest it unless you are really into racing. And I definitely wouldn't do it without an external transmission oil cooler.

Yup right around 1500 is the prime spot here. I played around with it a bit tonight you can get it all the way up to 2400 RPMs but 1500 is about prime. Really throws you back with the tourqe when you launch it. 2400 just burns rubber and is hard on your tranny. Now I know and I won't launch her again untill and if she ever see's the track

My reaction times are always between .005-.10 in my PGT. How was your 60'?

Splat, they don't know any better, their calling 60's R/T, although from the sound of it it just may BE their Reaction time! ROTFLMAO.

Your times are GREATLY affected by your 20's the diameter reduced your effective rear gear ratio. 17's are about right for what you did.

If your tempted to race it again:
1) Put it in DRIVE!, not OD, putting it in OD strains the tranny in a bad way.
2) Leave at 15-1700 RPM, any more isn't going to help.
3) If it's stock or nearly stock just let it shift for itself, GM engineers aren't stupid, it will shift at 5000 just about the optimum shift point.

I've run 2, a 2002 Xtreme stock and a 2000. Both 60's around 2.50 and did 11.50 in the 1/8th. The 2000 has a cheap cold air with cone filter, 180 degree thermostat and Flowmaster 40 with 2 and a half pipes (stock is 2 and a 1/4). the best it's done is 11.20 @ 63 cool engine cool air (night).

If you think your thrown back in the seat launching one of these try any car with a V8 engine sometime!. WOW!. My wifes 454 Monte Carlo race car does 1.60 shorts, my 85 Vette does 1.75's. My Blazer runs 60's the same as my tow vehicle. a decent 60 on a typical muscle car is around 2.00

*combining consecutive posts*

Oh, it's a black 2000 Blazer 2x2 SS, runs around the Buffalo area in the summer. License plate is "FOOTBRKR", for a reason.


*EDIT: swartlkk* - Combined consecutive posts.  Please use the Edit function to add additional information to your post if another member has yet to reply.

quote:

ORIGINAL: 2000BlazerSS
putting it in OD strains the tranny in a bad way.

I'm curious as to what you mean by this?

The circuits in a 200r4, 700r4 and 460's when in overdrive are different than if left in drive. That's not me that's GM and any tranny rebuilder who knows his stuff. The same thing goes if your towing, they RECOMMEND that you tow in drive NOT OD because it's easier on the internals. One of the magazines this month or last did a big article on the OD transmissions and mentions it too. It has to do with what circuits are open and what planatary's are in operation.
PS: The transmissions can be modified to strengthen this so OD isn't a weak link, but it costs $$$$ and is un-needed for our cars and MOST modified ones, you can get everything you need "racing" in the first 3 gears. Look at the rpm when you got thru the traps in the 1/4 mile, if it's under 5500 RPM you have no need for that 4th shift.
PPS: Don't beat on a GM OD when in OD, again, don't believe  me, talk to a tranny shop about what planatary's are in use in OD, it's a weak part of the tranny.

*combining consecutive posts*

Oh, I race a 1985 Corvette that has 3.42's and runs low 13's in the 1/4. It's got 50,000 miles on the STOCK 700r4. It's spent it's entire life being driven back and forth to the drag strip. It's always been raced in drive, NEVER OD. And it's never been apart...........................yet. A tranny man can tell more about this.


*EDIT: swartlkk* Combining consecutive posts.  Please use the Edit function to add additional information to your post if another member has yet to reply.

Hmm...  Well, if you never get into 4th gear, then this will not be a problem.  I can see when/if the trans gets to a sufficient enough speed for the PCM to command it to shift into 4th, however, the position of the gear selector doesn't change how the transmission shifts at WOT in other gears... 

I cannot seem to find any decisive answer as to when 4th gear engages at WOT when in OD and I don't go fast enough in my Bravada to find this out, but the other gears are unaffected, strength wise, by where the gear selector is.  In the 1/4 mile, you may experience premature 4th gear shifts which are a bad thing simply from a lost time standpoint and the fact that the 4th gear shift at WOT is forced at a lower RPM than the other gears. 

In my Bonneville I race in 3rd simply because I lose so much time when the darn thing decides to shift into 4th gear at around 85mph if left in OD, not for fear of breaking anything.  I lose around 0.4 seconds if left in OD.  Only problem with that is, if I get that car to trap higher than 98mph sometime in the future, I need to have the 3rd gear speed limiter removed.  Right now it will top out at only 98mph in 3rd.

*EDIT* - fixing stupid spelling errors...

quote:

The circuits in a 200r4, 700r4 and 460's when in overdrive are different than if left in drive. That's not me that's GM and any tranny rebuilder who knows his stuff. The same thing goes if your towing, they RECOMMEND that you tow in drive NOT OD because it's easier on the internals. One of the magazines this month or last did a big article on the OD transmissions and mentions it too. It has to do with what circuits are open and what planatary's are in operation.

The manual shift shaft has nothing to do with the the internal operation of any gearsets, with the exception of preventing a 4th gear shift of course.  You have been misinformed my friend.  I will say that driving in OD all the time will reduce the lifespan of the transmission due to exessive heat in OD.  I only use OD when I am driving above 55 mph, but most OD transmissions won't shift into 4th until around 55 mph anyway.

2.45 reaction is terrible ................. but i have a blazer with a carburated 350 after i gett the timing checked i will take it to  the track it is gonna be a beast at the strip

quote:

ORIGINAL: blazerxtreme1

my reaction time was a 2.45 I dont know if thats good but it was my first time. its an auto so i just stompped it

2.45 reaction time is horrible. What were you doing, takeing a nap?  The closer to 0 the better.

quote:

ORIGINAL: blazerxtreme1

my reaction time was a 2.45 I dont know if thats good ... its an auto so i just stompped it

I realize this is an old thread, but this is possibly the funniest thing I have seen on the computer. Ever.

Reaction time has nothing to do with your 1/4 time :)

quote:

ORIGINAL: 95Blzr

Reaction time has nothing to do with your 1/4 time :)

 
What?

Reaction time is everything in heads up drag racing!  You win based off of ET + reaction time.  If you have a super short ET, but sleep at the tree, you''ll lose.

Now, if you are only ET racing, then reaction time means nothing and you can leave whenever you wish after the green is lit.