higher rpm but same et

Ive been running 11.60s at 7000 rpm at trap.last weekend out if no where rpm is at 7500+ but mph is up about 1 mph but..et at every point 60 ft same..1\8 mile same..ran a 2 day race 11.66-68 et every time then round 3 went 11.80 on 11.66 dial at 7500+ rpm..any ideas ..tranny is a c4 with a 9.5 inch 4500 converter..footbrake to 3800..

Im Thinking high gear is going away

something is.....how's the fluid look?

look in the pan...

Could be the direct clutch pack? As said above, drop the pan.

Had pan off few weeks ago..fluid was clean ..not burnt but seemed to be lot of sluge looking stuff in pan..its still clean on dip stick

How old is the converter and was it installed new or used ? what are the rpm's going to from first to second ?

Have you noticed any problems going to reverse ? Direct clutch drum is used for reverse and 3rd gear.

Last how old is trans and what condition was it in ( new or used ) when installed ?

Its broke.

Pull it and fix it,...  

dkp

Both tranny and converter are new 80 passes or so..it does have a tranny brake but is hardly used not any issues going in reverse seems fine..

First to second is 7000 rpm

johndickjr wrote:First to second is 7000 rpm

If rpms have gone up thru all gear shifts and no reverse issuses or third gear flare!? I would look at converter and pump check fluid PSI ?

It dont flare 1-2 ..think it has been from 2-3..60ft is same(except last pass)1\8 time was same.. 1\4 mile was same but at 7500 not the normal 7000.. ill just pull it..its a pain in butt.hav to pull motor to get tranny out

johndickjr wrote:It dont flare 1-2 ..think it has been from 2-3..60ft is same(except last pass)1\8 time was same.. 1\4 mile was same but at 7500 not the normal 7000.. ill just pull it..its a pain in butt.hav to pull motor to get tranny out

If it is the direct clutch burned up with that few of passes then I would check.

Direct clutch pack clearance and set it to .050 to .060
these clutches if set to tight will drag and burn up quickly and if set to loose will slip and burn up.
do not use smooth thin clutches in this drum .
I recomend using the waffle style .078 clutches and steels 4 will be fine in your application.
If you want to install 5 in it with these pm me and I will tell you how to do it.
Fluid PSI should be 200 or better.
The thin .060 smooth or waffle clutches are to thin in my opinion and do not desapate or remove the heat fast enough. then they start warping and you loose surface area.
smooth clutches in Foward drum and set it to .030 to .035

let me know if you need anything else

the thin smooth clutches seem to work good in my c4........... 

richter69 wrote:the thin smooth clutches seem to work good in my c4........... 

Yeah but your the Hero ! 

Watched a video of my car and i can hear it flare with the 2-3 shift..whats that point to

direct clutch.

probly gonna take it apart.

Dont need 3rd gear for 1\8 mile..been running trophy class its 1\4 mile..ill go to no e..lol

dont park it where your gonna need reverse then......

Let us know when you pull and what you find out ! thanks

was going to a glide over winter anyway

johndickjr wrote:was going to a glide over winter anyway

Just let me know what you need, I have a few ready to run in the shop. One with a bell and flex-plate for a sbf.

imo I wouldnt run one behind that sb

richter69 wrote:imo I wouldnt run one behind that sb

X2 stick with the c4

New motor is will be way more motor then whats in it now