Why am i hitting the rev limiter,i have a c-4 tranny,with 4.10s,and i hit the rev limiter in 3rd before i reach the end of the track in the 1/8th mile my time slip is 60ft 1.57 1/8th mile ET is7.3 and mph is 85.56 i think thats a weird mph for that time anyone no whats going on?
Why
- Thread starter GREG91GT
- Start date
NOSNotch
Founding Member
I dont think the 4.10s are really helpin ya out with the c4, what are you shifting at and do you still have the stock limiter?
89MustangGX
I have nothing productive to add!
Only way I could see you hitting the rev limiterin that situation is if you're spinning your tires or you're not really in third. 
rd
Founding Member
Thats a pretty good time for the eigth mile. I'd be happy with it....
I have a C4, with 4.10's that runs 8.2@80 or so in the eigth on the motor, and 7.80@90 even on spray.
I ran some numbers and figured that I could use 4.56 gears in the 1/8th, and trap a max of 100, so I have room left to improve.
If it is really hitting the limiter, the converter may be too loose, or the trans is slipping in high, or you have tire spin. The converter is the most likely item. It seems to be working well in first and second thought.
I have a C4, with 4.10's that runs 8.2@80 or so in the eigth on the motor, and 7.80@90 even on spray.
I ran some numbers and figured that I could use 4.56 gears in the 1/8th, and trap a max of 100, so I have room left to improve.
If it is really hitting the limiter, the converter may be too loose, or the trans is slipping in high, or you have tire spin. The converter is the most likely item. It seems to be working well in first and second thought.
89MustangGX
I have nothing productive to add!
I did some quick calculations myself...
Based on running a C4/26" tire/4.10's/4% converter slip (?)
3rd Gear at 6250RPM would be about 110MPH.
A little creative math tells me that your converter would have tobe slipping about 20% in order to hit the rev limiter at about 95MPH in 3rd gear.
...just a little more info to consider.
Based on running a C4/26" tire/4.10's/4% converter slip (?)
3rd Gear at 6250RPM would be about 110MPH.
A little creative math tells me that your converter would have tobe slipping about 20% in order to hit the rev limiter at about 95MPH in 3rd gear.
...just a little more info to consider.
jadedinpa
Founding Member
Mike86Stang
Advanced Member
Like 89 said gearing/rpm tire size & speed of the car does 6250 equal... unless you are loosing alot of RPM somewhere. Plus your running a 2 inch taller tire than he to into acct for.
Something seems wrong to me.
Something seems wrong to me.
Mike86Stang
Advanced Member
FWIW
4.10's + 28" tire+ 1.00 ratio third gear + 6250 RPM = 128mph (assuming 100% lock & no slip)
Where ever your slipping here it at about a 33-34% rate.
4.10's + 28" tire+ 1.00 ratio third gear + 6250 RPM = 128mph (assuming 100% lock & no slip)
Where ever your slipping here it at about a 33-34% rate.
do you think my converter was made to do that like i said it was made just for my setup it cost me about 850 dollors,it hits the rev limiter about15yrds before the finish line when i ordered this converter they wanted my engine size,gear ratio,cars weight,aproxment horse power,tire size,nitrous or sc,cam specs,what heads,valve size,and allot more they wanted everything.
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