Pontiac GTO Forum banner

1 - 20 of 31 Posts

·
Registered
Joined
·
78 Posts
Discussion Starter #1
ok at the strip last night, got my drag radials on finally, other then that im a bone stock 05, but from what i understand i should be in high 8's, heres my bests of the night
all of my runs of the night looked something like this, 9.2s everytime, n e ideas?
any help would be appreciated
-thnx

reaction---0.519
60 ft---2.246
MPH---78.39
ET---9.236


reaction---0.542
60ft---2.229
MPH---78.39
ET---9.248
 

·
Registered
Joined
·
3,445 Posts
On street tires you should be low 2.0x. The .2 that you are over that translates to .4 in the 1/4. I'm not sure, but I think the lower time in the 1/8 will buy you .3. that would get the 8's you want. With DR's you should at least get high 1.8x and that would get you mid 8's.
 

·
Registered
Joined
·
78 Posts
Discussion Starter #5
i have the dr's now, i cant get a better 60ft.. n e suggestions, im lettin clutch out at 4,000 to launch without even breaking tread, any advie on 60ft PLEASE?
 

·
Registered
Joined
·
700 Posts
Simply improving your reaction time would get you into the 8s. :)
The pros say that they think of each light on the tree as "coming on", "on" and "going off", so they have three stages per each stage that a "normal" person sees. If you cut your reaction time down to about 0.250, then you're in the 8s. From there, improve your 60-foot time to get down into the mid-low 8s. Launching these cars does take a fair amount of finesse, even with drag tires.
 

·
Registered
Joined
·
13 Posts
Are you at high altitude?
I have an 05 A4 and get 8.6 to 8.8 at 83 to 84
MPH. That is at sea level though and stock tires and all.
Oh and you don't break the beems till ya start moving so a 5 second reaction time want net you any better or worse times.

Jeff
 

·
Registered
Joined
·
700 Posts
Jeff, are you certain of that? When I was at the track the first time, I wasn't told that I'd be running alone, so I was waiting for the next guy to pull up (and not paying attention to the lights), by the time I noticed it was green, several seconds had gone by and my time was 18 seconds (this was in a 1994 Trans Am that ran pretty consistent 14.1-14.4). I'm not calling you a liar by any means, but do you know if any tracks use different timing methods than the track you run? I could be really wrong though. hehe
:willy:
 

·
Registered
Joined
·
78 Posts
Discussion Starter #9
well, ok so R/T is anuther improvement but my R/Ts r still ok i think. my 60fts r bad though. whats the key or in general to getting good 60ft times in these cars, i live in san diego as of the altitude question.
 

·
Registered
Joined
·
700 Posts
A higher gear ratio may help, by allowing you to get into your peak powerband a bit sooner. If you're not breaking the tires loose launching from 4000 RPM, I'm quite impressed, even WITH drag slicks. Mine woulda gone positively crazy if I launched at such a high RPM. hehe
 

·
Registered
Joined
·
13 Posts
baron_iv said:
Jeff, are you certain of that? :willy:
Pretty sure of that.
I run a Grand National and usually sit a couple of seconds after the other car while I'M building boost and I can Still run most of em down.:D
 

·
Registered
Joined
·
700 Posts
Interesting. The method you explain would be the logical way for them to do the test/tune days, but it would add a level of difficulty for the professionals if their time was determined by the tree instead of whenever they move. Next time I go to the track, I'll ask what method they use here. I don't get to go often, it's 2 hours away and only open part of the year.
 

·
Registered
Joined
·
78 Posts
Discussion Starter #15
any 60ft help suggestions, and the local track i believe here is on how fast you move
 

·
Registered
Joined
·
700 Posts
A rear-end swap to 4.xx gears would help you get to your peak powerband sooner, which should have some effect on your 60' time. Other than that, you should probably launch from different RPMs to see which one gives you the best time. Any way you can make more low-end torque or get into your powerband sooner would help your 60' time. Making sure that you don't have any wheelspin (which doesn't seem to be a problem for you) is also key to getting a decent 60' time.
I'm sure there'll be others who have some better suggestions than mine, this place is a wealth of knowledge.
 

·
Registered
Joined
·
4 Posts
Your sixty foot time is whats killing your i/8th mile time. Reaction time has nothing to do with it because the clock doesn't start until your front wheels break the beam.
 

·
Registered
Joined
·
358 Posts
hotrod37 said:
Your sixty foot time is whats killing your i/8th mile time. Reaction time has nothing to do with it because the clock doesn't start until your front wheels break the beam.
Exactly true.

Reduce rear tire pressure to about 20-22 lbs., tach it up to around 2300-2400 rpms, when the last light drops, nail the gas. If it starts to spin, feather the throttle.

Most of all just practice!:cheers
 

·
Registered
Joined
·
1,356 Posts
Well since you are running Dr's the method of launch changes from what I currently do. However, my suggestion would be to find out where your traction point is. Practice with it when the tires are good and warmed up. Get them in the water box and then try launching at different RPM's. A 4000 RPM launch seems like too much in my opinion, but I have never used DR's.


Personally I would think the ideal launch for your would be around 3000 rpm's.
 
1 - 20 of 31 Posts
Top