Posted By: gj69charger
I lost a second. - 06/16/09 08:14 PM
Somewhere I lost a second in my 1/4 mile times. I've always run 10.80s and now I'm running 11.80s-12.00s. I’m lost a tenth in my 60ft., a half in the 1/8 and a second in the ¼. I initially thought it was from an E85 conversion I did this year. However when I switched back it still ran the same. Motor runs fine, checked compression and it’s good. I had some work done on the rear end, but doesn’t seem to be binding. The only thing left is the trans. Any ideas would be greatly appreciated. Greg
Posted By: hugo
Re: I lost a second. - 06/16/09 08:33 PM
Its probably your trans or converter going out.
Posted By: emarine01
Re: I lost a second. - 06/16/09 08:35 PM
Wow tuff question on where to start
check gear ratio maybe someone else is running your gear set
Posted By: MR_P_BODY
Re: I lost a second. - 06/16/09 08:45 PM
Does the converter still flash the same?
Posted By: cgall
Re: I lost a second. - 06/16/09 09:09 PM
Check plugs, wires, and dist. cap. Check rotor button. Test fuel pump volume. If all is well, pull front cover and check cam timing. You are losing ET all the way down the track.
Posted By: moparmxz
Re: I lost a second. - 06/16/09 09:28 PM
Another vote for the converter.
Posted By: BradH
Re: I lost a second. - 06/16/09 09:32 PM
Another vote for the converter.
If it's a flat-tappet cam, I'd check that to make sure you're not losing lobes.
Posted By: marvo451
Re: I lost a second. - 06/16/09 09:42 PM
Converter, drop the transmission pan and I bet it looks like a junk metal sale.
Posted By: Barnstorm
Re: I lost a second. - 06/16/09 10:31 PM
Do the EZ stuff first. Make sure the brakes are not dragging. Wierd gremlins breed in the off season.
Posted By: deaks
Re: I lost a second. - 06/16/09 11:34 PM
What happens to the converter internally when it starts to fail.
Mick
Posted By: Mopar_Ray
Re: I lost a second. - 06/17/09 01:24 AM
Rookie question, have you checked electrical stuff? rotor and cap? MI winters gotta be hard on that stuff.
Posted By: Dodgem
Re: I lost a second. - 06/17/09 02:22 AM
I was once off 7 tenths in the spring and forgot I had backed timing off for cool fall air street driving. was at 29 back to 38 and it went from 12.2 to 11.5.
Just this week I tried throttle stopping to the twelves went back to full throttle and 11.21 [Edited by Moparts - Keep it clean]?? oh timing went from 35 to 40 and 10.82!!
It happens
backing plates on rear axles rotating and binding up the brakes?
Posted By: racerb440
Re: I lost a second. - 06/17/09 03:15 AM
I had the same problem once. Secondaries on carb didn't open, and car lost 1.2 seconds in quarter.
Posted By: rebel
Re: I lost a second. - 06/17/09 07:36 AM
i'm with the valve spring guessing crowd, mainly because i've been there & done that.
Posted By: MAVERICKSHEMI
Re: I lost a second. - 06/17/09 07:46 AM
i'm with the valve spring also
Posted By: boscosis
Re: I lost a second. - 06/17/09 11:36 AM
This is embarassing but we've smoked the tranny three times in a car before we finally figured out that the cooler was plugged. It behaved like you're describing. The motor sounded great and pulled clean; it just took forever to reach shift points and ran about a second slower than it should have. On the jackstands prior to running it would shift fine. A few seconds after launch it would fill the car with burnt clutch smell. However the fluid always smelled and looked fine.
Just a thought.
Posted By: KMPX2
Re: I lost a second. - 06/17/09 11:54 AM
How old are your slicks? Maybe time for new ones.
Posted By: JAKE68
Re: I lost a second. - 06/23/09 08:11 PM
I believe we found the problem. Leak down showed that #5 cyl had 80% past the intake valve. Also that the valve springs where way down for his set up.So I guess heads come off.
so i'll ask a really stupid question. Did you check to make sure you are getting WOT with the pedal to the floor?
It wasent even close 
and to make things worse it was 4 wheel drive 
I lost more than a second, it was a week end 