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3.08 gears+tight converter+drum brakes=fail

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Old 02-09-2013, 05:59 PM
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Default 3.08 gears+tight converter+drum brakes=fail

First time to the track today- car would not build any boost off the line and is pretty lazy down low. Just pushed the frt tires when I tried to build boost at the line.


and no the car is not spinning- the 4.8 is just kinda gutless out of boost with 3.08 gears.


This is 16psi on E85


I'm happy with the MPH- car is making the donuts when boost comes in.


may try to spray first gear and see what happens- Don't think I want a trans brake and a looser converter.












Last edited by ronnieforrester; 02-10-2013 at 08:55 PM.
Old 02-09-2013, 06:03 PM
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Dam nice MPH! What's your weight?
Old 02-09-2013, 06:09 PM
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Originally Posted by 831jd
Dam nice MPH! What's your weight?

Im a BBM- car weighs 2970 empty-


the 10.9 pass was with me at 350lbs
the 10.7 pass was a 150lb friend driving who has a mid 8sec turbo fox.
Old 02-09-2013, 06:10 PM
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Dear God man... that is some mile an hour!
Old 02-10-2013, 09:54 AM
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Buy a converter. no reason that tc wont come up fast and it 60ft good. A good ptc converter will drive very tight but still build boost on the line.
Old 02-10-2013, 10:45 AM
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Originally Posted by skinnies
Buy a converter. no reason that tc wont come up fast and it 60ft good. A good ptc converter will drive very tight but still build boost on the line.

I would love that- but my fear that a big stall will also be loose up top.


this is mainly a fun street car for me but its completely useless out of boost in first gear.


The converter is done by a local 1 man shop who builds race transmissions and converters and is well known in the southeast and has been doing converters for 30 years.

i think the weak 4.8 out of boost then the massive HP in boost is difficult to tune a converter.


BUT the first converter was also a dog down low and blew thru it up top.


now the restall is the same dog down low - will only foot brake to 1500-1600 and flash to 1900ish but is tight up top


if PTC can get me a converter that i can foot brake to 3500 on a 2 step and build 10+ psi of boost but not slip too much up top sign me up.


Chris at Circle D also comes highly recommended as well as Lenny at UCC.

do you have a particular contact at PTC ?
Old 02-10-2013, 10:53 AM
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thats some nice MPH.

pics of the car/setup?
Old 02-10-2013, 11:02 AM
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Originally Posted by a4ls2goat
thats some nice MPH.

pics of the car/setup?



thanks












http://s40.photobucket.com/albums/e2...x%20MuffStang/
Old 02-10-2013, 11:03 AM
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got truck oil pan !



Old 02-10-2013, 11:50 AM
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I always talk to Tim at ptc he's a really easy to work with and knows his stuff. My old set up would drive around like it was a 2500 stall and on the foot brake would flash to 3600 and build 6 or 7lbs. I think I paid $450 for the converter and its rated to 1000hp.
Old 02-10-2013, 02:58 PM
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I've run ptc stuff for awhile now and they've done good and helped tremendously on my turbo cars. I have one in my fairmont behind a 6.0 with a 80mm we'll see how it works. Or you can let nitrous help you. It will help alot. But great numbers at the track that thing runs hard on the big end. Nice!
Old 02-10-2013, 04:19 PM
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Nice fox,same color as my notch. Im hoping mine runs that kind of mph
Old 02-10-2013, 04:24 PM
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A option is to run a multi disc converter that you can lock on the top end of the track.
Old 02-10-2013, 04:28 PM
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These fricking 4.8s rip pretty darn good. Nice mph. Cant wait to see how it does when you get the 60 foot down.
Old 02-10-2013, 05:26 PM
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not bad at all!!
Old 02-10-2013, 06:05 PM
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Originally Posted by mike13
A option is to run a multi disc converter that you can lock on the top end of the track.


multi disc on a non lock up TH400 ?


more info/link please.
Old 02-10-2013, 07:01 PM
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FWIW, my chevelle weighs nearly 4,000lbs and with my convertor it ran 100mph in the 1/8th. No other changes with their (PTC spec'd) convertor it ran a 118mph in the 1/8th and runs extremely well on the street.
Old 02-10-2013, 07:17 PM
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Originally Posted by Wicked69
FWIW, my chevelle weighs nearly 4,000lbs and with my convertor it ran 100mph in the 1/8th. No other changes with their (PTC spec'd) convertor it ran a 118mph in the 1/8th and runs extremely well on the street.


That's a nice gain for sure. Just hate to pull the trigger on another converter and not be what I want.
Old 02-10-2013, 08:56 PM
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vids added to first post
Old 02-10-2013, 08:58 PM
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The problem is you are running cheap converters, get a good ptc and you will be happy. I always use Dusty Bradford at PTC.


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