Full Performance

[GTOJAY]

Hey guys,
My import VR4 should be with me in a couple of days. Is there anyway of telling that she is running at full performance? Not having driven a car thats 0-60 in 5secs, i wouldn't really know if she was only at half throttle. Any tests or tricks of the trade...measuring 1/4 mile and see if it willl cover it in around 14 secs??

[Igovert500]

Measure the compression, dyno it, run hte quarter in about 13.6ish. (Although that can be different depending on your reaction time, altitude, weather...) First time I took it to the track I ran 14.1 for 5 or 6 runs, before I finally got a good launch and good reaction time to coincide. Then I got a 13.59 But if you really think its not performing correctly get it checked out by a mechanic, give it a tuneup

[Sweet Stealth]

Go out and mash the gas.. If it seems slow, there is something wrong..

What yr is it? Any mods at all??

Igovert500. Why were you concerned with the reaction time as far as your 1/4mile time??? The reaction time isnt figured into your ET..

[Igovert500]

I've heard that before
and it confuses me, because I am almost 99% sure it is. I race at ATCO in NJ. And I'm pretty sure it is. I mean my first 2 times I boged on the launches, then I had 2 good launches with reaction times around .8 And my time was 14.1
Then I got a good run where I had the same launch and shifting as the previous 2, yet my reaction time was .3 and I ran a 13.59
I launched at around 4500 on the last 3, and had clean quick shifts, nothing changed other then my reaction time so I am fairly confident it is included.
You're the second person that has said that it doesn't count, and I've heard people say it is included. So I dunno. I was just always under the impression that it was

[ikOnone]

yea, i would agree, dyno, comp. test, or 1/4 mile trials would be the best way. 91-93 = 300 hp (220ish to the wheels) and 2nd gen = 320hp (240ish to the wheels) assuming they are stock. also first gens should runa bout 13.9-14.2 trapping at about 99 mph and 2nd gens should run 13.5 - 13.8 trapping in the 102ish range. this is assuming a good launch which might take parctice (good launch is less than 1.9 sec 60').

igovert, yeah, i have allways heard that reaction time makes no difference. acctually, i have seen cars that do not go intentionally when the light turns green (next to a much more powerful/dangerous car and want to give it space) and then after they do launch they get the same et and traps that they would otherwise. i think either you are going to a screwy track or you are thinking about 60' times maybe?

[Igovert500]

I'll have to check my slips again, (i hope i still have them all) to compare the 60'
I doubt the track is screwy, it's a pretty nice one, ATCO raceway.
Figuratively then, what would account for the difference? I attributed it to the reaction time, because the discrepancies were about even (half a second). I mean as far as I remember the launches and shifting were the same. Maybe I just shifted/launched slightly faster the last time...?
well thanx for the clarification.

[ikOnone]

with the exception of a missed/really bad shift, it is all in the 60' from what i hear. you got me stumped???

[Sweet Stealth]

If your 60ft is better your ET will be better by more generally..

Like say your 60ft was 1.9 and ran 14sec, then you cut a 1.7, its very possible to get say a 13.6 then..

Tracks ive been to never include the reaction time. Some people think it matters but it really doesnt.

Hell I ran a 13.1 with a 2.5second reaction time.. I sure the hell know my car cant run 11seconds.. I just sat at the line, made sure my RPMS were where I wanted and that..

[BB1970]

I did 1/4 mile last sunday and my reaction time was included. wish it wasn't!

[Sweet Stealth]

Originally Posted by BB1970

I did 1/4 mile last sunday and my reaction time was included. wish it wasn't!

Are you sure man??? Can u post up the slip or the #'s from it.. As far as I know the reaction time is never included in the 1/4 time. But I dont know everything. Just everywhere ive been doesnt include the reaction time (only been to 2 tracks though)

As far as I know the only way reaction time will matter is in a straight up race. If both cars get the green at the same time. Say you both run 14seconds and the other guy has like .5 second better reaction he will beat you to the finish line by .5 seconds.. But still both have a 14second 1/4 mile. Theorectically anyway.. Thats the only way ive heard that it matters.. Looking around on different forums online, I always see people say "if I had a better reaction time I would run faster" then everyone else posts and they say it doesnt matter in your ET.

I know for sure at the tracks I went to it doesnt count.. Like I said I ran a 13.1 with a 2.5second reaction time(waiting, cause I was learning how to launch) and I know dam well my car doesnt run 10 seconds..

[Igovert500]

Ok, I managed to find one of my timeslips under the seat...its the embarrasing one...my first. So not too much flaming

here's what it includes:
R/T .389
60' 2.361
330 6.208
1/8 9.355
mph 78.01
990 11.986
1/4 14.336
mph 99.27

So don't laugh too much, it was my first time. And as you can see on my 60' I boged on the launch and it sucked. But the first stat included was the R/T. The next few runs I got my launches to get better, but kept focusing on them and not the light...so my R/Ts went up to to .8, and I was running 14.1 for 2 or so runs. Then paired a good launch with the .3 R/T again, and got a 13.59, so that is where my confusion arose. I assume I just calmed down and my launching just got better as time went on. I wish I could find the other time slips to compare the 60's, but I musta vacuumed them up. I will run again...then we shall see. But thanks for all the corrections.

[Sweet Stealth]

Ya that seems right.. If you got even a 2.0 60ft or less then 13.6 is very possible..

From what ive seen if you cut the 60ft down by say .1seconds, usually your total time will go down about .15. So if you went 2.3 and then went 1.9 60ft. You could aprox get .6 +/_ off of your total time..

That is just kind of a good general idea but not 100% accurate. Like for me I kept on cutting 1.9-2.0 60fts and running 13.0-13.2. Finally cut a decent(not great yet) 1.874 60ft and ran a 12.9

[BB1970]

Originally Posted by Sweet Stealth

Are you sure man??? Can u post up the slip or the #'s from it.. As far as I know the reaction time is never included in the 1/4 time. But I dont know everything. Just everywhere ive been doesnt include the reaction time (only been to 2 tracks though)

As far as I know the only way reaction time will matter is in a straight up race. If both cars get the green at the same time. Say you both run 14seconds and the other guy has like .5 second better reaction he will beat you to the finish line by .5 seconds.. But still both have a 14second 1/4 mile. Theorectically anyway.. Thats the only way ive heard that it matters.. Looking around on different forums online, I always see people say "if I had a better reaction time I would run faster" then everyone else posts and they say it doesnt matter in your ET.

I know for sure at the tracks I went to it doesnt count.. Like I said I ran a 13.1 with a 2.5second reaction time(waiting, cause I was learning how to launch) and I know dam well my car doesnt run 10 seconds..

stealth i still dont understand how the reaction time doesnt count in the run, i thought that was what it was all about beating the other car you are against to the line. (in my case an impretza who smoked his clutch he he )
here it is

reaction 1.258
60ft 2.123
330ft 5.910
1/8 9.100
1000ft 11.832
1/4 14.253

please note it was my first time ever down the strip so no sarcasm please!!!!!!

[Sweet Stealth]

The way it works is your ET doesnt start till you move.. Depending on the light system (tree) there are 2 different setups I believe.. I think one is .5reation is perfect and the other is 0.00 reaction.

Not sure if you have any mods on your car.. But with your ET if you cut a decent 60ft you could run mid-upper 13's. Now if you get your reaction time down to .5 you will still run the mid-upper 13s.

Unless the tracks ive been to and hear people talk about are screwy .

Im like 99% positive that no track counts reaction time in your ET.. The reaction time is a big factor in who wins the race, just not in your ET..

Both people should leave on the light, say u stick around checking your hair or something. The other person has you in reaction time, so he is infront of you.. But he tripped the light so his 1/4mile time started before you left the line. So then u go. Your time starts.. so if say he had a 1sec reaction time. You had a 2 second reaction time.. BOth cars are identical(arguement sake) same 60ft everything.. He would beat you to the end of the 1/4mile 1st. By a second.. But you both would have identical times..

When you are talking NHRA 5 second cars then it is almost the deciding factor.. They all sometimes run within .1 seconds of each other, so if someone cuts a better light, they usually have the advantage and lots of times win..

Does that make sense?? Im trying to explain it the best I can, but maybe im not doing a good job..

[BB1970]

i got you now,
thanks for clearing that up man.

im running again in may so i will try that.

cheers