powerslide?

firebird · 10-06-2014, 07:35 PM

tranny worked good with an other combo--just went though the trans-6 passes on convertor for test- sent back once --too loose of a convertor? i'm frustrated and the end of race here for the winter with no fix

Rick Shirey · 10-07-2014, 10:29 AM

Is this an IHRA class car or a NHRA SS/CS car and what is the low gear ratio? If it is a NHRA class car and your engine is built for high RPMs I believe your problem or at least part of it is your rear gear ratio. My NHRA SS/CS car uses a 6:20 rear gear and a 2:08 1st gear and uses a 7" converter that flashes to around 7600 with the 60's in the low 1.30's.

FED 387 · 10-07-2014, 11:38 AM

more than likely too small of a rear gear for that heavy a car-- probably 5:83-6:20 would be more in order and 5:83 could be too small more like a 6:14 to 6:20 for sure--whats current low gear ratio?? need at least a 1:90 something or more too

Curt Rees · 10-07-2014, 12:33 PM

What size rear tire and rim, radials or bias? You may have the tires slipping on the rims.

When I first got my GT Olds running, I had a similar issue. I replaced the transmission, PG, twice before I found out my radials, 9x30, were slipping on the wheels. I ended up having to pin the tires.

My tire shop used the normal liquid when they mounted the tires. They would actually slip on the rims for a split second or so.

Something else to check.

#5457

Curt Rees

10-06-2014, 07:35 PM	#1
firebird Junior Member Join Date: Jan 2011 Posts: 52 Likes: 1 Liked 1 Time in 1 Post	Re: powerslide? tranny worked good with an other combo--just went though the trans-6 passes on convertor for test- sent back once --too loose of a convertor? i'm frustrated and the end of race here for the winter with no fix

10-07-2014, 10:29 AM	#2
Rick Shirey Junior Member Join Date: Apr 2003 Posts: 53 Likes: 0 Liked 0 Times in 0 Posts	Re: powerslide? Is this an IHRA class car or a NHRA SS/CS car and what is the low gear ratio? If it is a NHRA class car and your engine is built for high RPMs I believe your problem or at least part of it is your rear gear ratio. My NHRA SS/CS car uses a 6:20 rear gear and a 2:08 1st gear and uses a 7" converter that flashes to around 7600 with the 60's in the low 1.30's.

10-07-2014, 11:38 AM	#3
FED 387 VIP Member Join Date: Jun 2006 Posts: 3,428 Likes: 560 Liked 335 Times in 182 Posts	Re: powerslide? more than likely too small of a rear gear for that heavy a car-- probably 5:83-6:20 would be more in order and 5:83 could be too small more like a 6:14 to 6:20 for sure--whats current low gear ratio?? need at least a 1:90 something or more too

10-07-2014, 12:33 PM	#4
Curt Rees Member Join Date: Dec 2001 Location: Ft. Pierre, SD Posts: 357 Likes: 434 Liked 251 Times in 51 Posts	Re: powerslide? What size rear tire and rim, radials or bias? You may have the tires slipping on the rims. When I first got my GT Olds running, I had a similar issue. I replaced the transmission, PG, twice before I found out my radials, 9x30, were slipping on the wheels. I ended up having to pin the tires. My tire shop used the normal liquid when they mounted the tires. They would actually slip on the rims for a split second or so. Something else to check. #5457 Curt Rees __________________ Curt Rees 5457 SS Last edited by Curt Rees; 10-07-2014 at 12:56 PM.