What do you think it could be?

Joe Grippo · 06-20-2011, 11:37 AM

So, looking for some opinions on this situation. I had the race car out to the track finally on Friday for some check out passes before the regular weekend races. I pull into the water box and do my burn out and the car sounds like its laboring a bit as it usually it has a nice high pitch scream…ok. So I go ahead and stage up, footbrake it to my normal 4000 rpm and the light turns green and I swap feet matting the gas expecting to see the sky but no…the rpm on the tach goes up but the car just drives away like its pulling away from a stop sign. I drove easy down the track and when I shifted it seemed firm and crisp as normal. I have some ideas but I am looking for opinions to confirm my suspicions. For reference it’s a 10.40 bracket car with a 625 hp SBF, C4 with an 8” converter with a 4500 stall. Trans was freshened in ’09 and the TC was flushed out at the same time. Fluid level and color are normal with no burnt smell. Thoughts?

I don't know if this needs to go to the bracket section or not...

Mike Pearson · 06-20-2011, 11:47 AM

sounds like something went sour in the engine. Spun bearings or possibly a broken rocker arm, valve springs. I would pull the filter and check for metal in the oil.

Phillip marvetz · 06-20-2011, 12:10 PM

Sounds like a broken sprag.

Pedigo Perf · 06-20-2011, 12:13 PM

Sprag in the converter for sure

1320racer · 06-20-2011, 02:36 PM

another stating it's the sprag

Joe Grippo · 06-20-2011, 02:52 PM

Thanks everyone..That was my though and it seems to be the general consensus. Guess I'll pull it out...

Lots of experience around here, thanks again for letting me pick your brains.

Chad Rhodes · 06-20-2011, 11:02 PM

sprag

Earle Holt · 06-21-2011, 03:08 PM

Put a stick in it Joe!

Joe Grippo · 06-21-2011, 03:17 PM

Quote:

Originally Posted by Earle Holt

Put a stick in it Joe!

Hey Earl, I never thought about that! Got any spare G-Forces laying around?

HR9121 · 06-21-2011, 10:36 PM

Just to make you feel better informed one more time its the sprag.. just went through the same thing two weeks ago car acted identical to what you are saying.

06-20-2011, 11:37 AM	#1
Joe Grippo Member Join Date: Apr 2002 Location: Elverson, Pa Posts: 158 Likes: 121 Liked 41 Times in 4 Posts	What do you think it could be? So, looking for some opinions on this situation. I had the race car out to the track finally on Friday for some check out passes before the regular weekend races. I pull into the water box and do my burn out and the car sounds like its laboring a bit as it usually it has a nice high pitch scream…ok. So I go ahead and stage up, footbrake it to my normal 4000 rpm and the light turns green and I swap feet matting the gas expecting to see the sky but no…the rpm on the tach goes up but the car just drives away like its pulling away from a stop sign. I drove easy down the track and when I shifted it seemed firm and crisp as normal. I have some ideas but I am looking for opinions to confirm my suspicions. For reference it’s a 10.40 bracket car with a 625 hp SBF, C4 with an 8” converter with a 4500 stall. Trans was freshened in ’09 and the TC was flushed out at the same time. Fluid level and color are normal with no burnt smell. Thoughts? I don't know if this needs to go to the bracket section or not...

06-20-2011, 11:47 AM	#2
Mike Pearson VIP Member Join Date: Mar 2007 Posts: 2,417 Likes: 596 Liked 1,879 Times in 562 Posts	Re: What do you think it could be? sounds like something went sour in the engine. Spun bearings or possibly a broken rocker arm, valve springs. I would pull the filter and check for metal in the oil. __________________ Mike Pearson 2485 SS

06-20-2011, 12:10 PM	#3
Phillip marvetz Senior Member Join Date: Oct 2008 Location: Lynden ,WA Posts: 820 Likes: 0 Liked 3 Times in 3 Posts	Re: What do you think it could be? Sounds like a broken sprag. __________________ 2009 V/SA Record Holder

06-20-2011, 12:13 PM	#4
Pedigo Perf Member Join Date: Feb 2008 Location: Wichita Ks Posts: 383 Likes: 70 Liked 30 Times in 17 Posts	Re: What do you think it could be? Sprag in the converter for sure

06-20-2011, 02:36 PM	#5
1320racer VIP Member Join Date: Nov 2007 Location: New Jersey Posts: 2,628 Likes: 160 Liked 758 Times in 379 Posts	Re: What do you think it could be? another stating it's the sprag

06-20-2011, 02:52 PM	#6
Joe Grippo Member Join Date: Apr 2002 Location: Elverson, Pa Posts: 158 Likes: 121 Liked 41 Times in 4 Posts	Re: What do you think it could be? Thanks everyone..That was my though and it seems to be the general consensus. Guess I'll pull it out... Lots of experience around here, thanks again for letting me pick your brains.

06-20-2011, 11:02 PM	#7
Chad Rhodes VIP Member Join Date: Jan 2005 Location: Where the Green Grass Grows, AL Posts: 2,375 Likes: 0 Liked 3 Times in 3 Posts	Re: What do you think it could be? sprag __________________ Chad Rhodes 2113 I/SA

06-21-2011, 03:08 PM	#8
Earle Holt Member Join Date: Nov 2001 Posts: 194 Likes: 1 Liked 4 Times in 1 Post	Re: What do you think it could be? Put a stick in it Joe! __________________ Earle Holt 1055 Stock

06-21-2011, 10:36 PM	#10
HR9121 Live Reporter Join Date: Jan 2011 Location: New Bern, NC Posts: 3,466 Likes: 146 Liked 3,355 Times in 730 Posts	Re: What do you think it could be? Just to make you feel better informed one more time its the sprag.. just went through the same thing two weeks ago car acted identical to what you are saying. __________________ James Williamson W200 J/SA. SS/JA