Car is getting slower in 1/4 - Page 2 - MustangForums.com



4.6L General Discussion This section is for non-tech specific information pertaining to 4.6L (Modular) Mustangs built from 1996 to 2004.

Reply
 
 
 
Thread Tools Search this Thread
Old 06-26-2011, 10:07 AM   #11
uberstang1
Chupacabra
 
uberstang1's Avatar
 
Join Date: Jul 2004
Location: wilkes-barre PA
Posts: 9,612
Default

Quote:
Originally Posted by Repzard View Post
Decent numbers Bramas, what are you running for gears ?
I beleive hes running 4.30s
uberstang1 is offline   Reply With Quote
Old 06-26-2011, 10:20 AM   #12
mustangmancp
5th Gear Member
 
mustangmancp's Avatar
 
Join Date: Apr 2006
Location: Missouri
Posts: 4,503
Default

Id have to say its weather...your 60fts were similar in two of your runs..so you can't really count that
mustangmancp is offline   Reply With Quote
Old 06-26-2011, 12:45 PM   #13
TRUEBLUE3934
4th Gear Member
 
Join Date: Sep 2009
Location: NC
Posts: 1,481
Default

Hmmm...
The thing that stands out to me are your 1/8 and 1/4 trap speeds. You are picking up 26mph on the back end, which is a lot. The 1/8 traps are low for a car trapping 107 in the 1/4. This indicates to me that you could trap even higher in the 1/4 with a better 1/8 pass. I'm wondering if your shifting is a factor...
TRUEBLUE3934 is offline   Reply With Quote
Old 06-26-2011, 01:13 PM   #14
turbo232
4th Gear Member
 
turbo232's Avatar
 
Join Date: Mar 2010
Location: GA
Posts: 1,187
Default

Quote:
Originally Posted by TRUEBLUE3934 View Post
Hmmm...
The thing that stands out to me are your 1/8 and 1/4 trap speeds. You are picking up 26mph on the back end, which is a lot. The 1/8 traps are low for a car trapping 107 in the 1/4. This indicates to me that you could trap even higher in the 1/4 with a better 1/8 pass. I'm wondering if your shifting is a factor...
well, in the video he is spinning a little from first to second. that will slow you down.
turbo232 is offline   Reply With Quote
Old 06-26-2011, 02:58 PM   #15
tim2002gt
3rd Gear Member
 
tim2002gt's Avatar
 
Join Date: Aug 2007
Location: Tulsa, OK
Posts: 670
Default

Quote:
Originally Posted by turbo232 View Post
well, in the video he is spinning a little from first to second. that will slow you down.
x2

Your losing alot of momentum when you spin early in the run. When I used to run Nitto dr's I would spin alot on the 1-2 and 2-3 shifts. I switched to MT dr's and my et's dropped .2-.3 consistently with no other changes.

edit: I should add that my 60' times also improved, but even on my runs where my 60' times were the same as with the Nitto's my 1/4 et still improved by .2-.3

Last edited by tim2002gt; 06-26-2011 at 03:02 PM.
tim2002gt is offline   Reply With Quote
Old 06-26-2011, 04:03 PM   #16
Jay-rod427
3rd Gear Member
 
Jay-rod427's Avatar
 
Join Date: Mar 2010
Location: KS
Posts: 555
Default

Have you changed your shift rpm? I know on my car any thing over 5600 and it picks up MPH, but loses ET. I have tried several times even on the same day back to back passes.
Jay-rod427 is offline   Reply With Quote
Old 06-26-2011, 04:18 PM   #17
GTtony
1st Gear Member
 
GTtony's Avatar
 
Join Date: Oct 2008
Location: CA
Posts: 120
Default

Mabey U got fatterer over winter break. LMFAO...

Ive been avg 10 lbs a year since ive been married. Now im like 6'0 250lbs.
GTtony is offline   Reply With Quote
Old 06-26-2011, 06:20 PM   #18
Moonshine
5th Gear Member
 
Moonshine's Avatar
 
Join Date: Nov 2008
Location: Wa
Posts: 2,284
Default

Sounds like you've beat your clutch to shat and it's not biting as hard as it once was.

Just kinda sounds....slippy... Idk.
Moonshine is offline   Reply With Quote
Old 06-26-2011, 06:44 PM   #19
TRUEBLUE3934
4th Gear Member
 
Join Date: Sep 2009
Location: NC
Posts: 1,481
Default

A little wheel spin can negatively effect your ET, but can actually increase your trap speeds. I guess the question there is how much wheel spin is he experiencing?

No question in my mind that he can trap 108-109mph with a better 1/8 pass. I agree that ET Street Radials are superior in grip to Nittos. A good DR is a very good way to address excessive wheel spin.
TRUEBLUE3934 is offline   Reply With Quote
Old 06-26-2011, 07:57 PM   #20
BraMas
5th Gear Member
Thread Starter
 
BraMas's Avatar
 
Join Date: Jun 2005
Location: Holland, MI
Posts: 4,634
Default

I think it is my 1/8 mile also that is killing me. And my clutch is on it's way out maybe it is slipping in the lower gears and once it stops slipping after the 1/8 it is able to push me into the 107 traps. I did spin a little on me take off and 2nd gear change but I don't think enough to real kill my time plus my 60ft isn't that bad for being on street tires
BraMas is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
07 GT weird windoww issue duffman668 General Tech 2 08-26-2015 05:46 PM
Hesitation after replacing radiator DrunknRuckus 4.6L (1996-2004 Modular) Mustang 5 08-23-2015 11:05 AM
Dyno 1/4 mile estimates vs. real world? kdryan The Racers Bench 3 08-22-2015 03:14 PM
Groaning noise coming from rear when turning right 92 5.0stang 5.0L (1979-1995) Mustang 4 08-13-2015 07:46 AM
FORD FRENZY!!! Milan Dragway-September 12th Milan Dragway Members Rides and Car Show Section 0 08-12-2015 04:43 PM


Tags
12s, 14, 18, 1995, 87, beat, car, edge, forums, gt, mustang, slow, slower, time, trapping

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump


All times are GMT -5. The time now is 06:30 PM.