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Old 01-30-2008, 11:07 PM
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Automatic replacing the T-10 any advice?

I am going to be swapping out the manual for an automatic so I can be more consistent at the track this year. The auto will be a reverse valve body TH400. I am also hoping to lower my times with this trnasmission as it should hook better and shift quicker than I could with the manual. I am not sure what the stall speed on the cnverter is so I am not sure how it will launch actually. The transmission is coming off a fairly mild 454 motor that I will use in another car down the road. So what do you all think? Will it run faster or not. I am sure it will be more consistent and that is the main thing in bracket racing anyway. My car ran a best of 13.74 at 99.74 last year with a 60ft time of 2.11. Cam is a single pattern 454 oft and 216 duration. I will also swap from a performer intake to a Holley Street Dominator and from an Edlebrock 600 to a Holley 650. I think they may be more than the cam needs? Heads are Trick Flow and are not being used much at all with the mild cam I have. That too will be changed eventually.

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Old 01-31-2008, 08:40 AM
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What is the current engine?

Shane
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Old 01-31-2008, 08:48 AM
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I think I would buy a torque converter of the stall that I was looking for. torque converters are not that expensive(don't forget the pump seal). Then you can go to the track and establish a new base line. You know how it ran before. Making this many changes can be tricky the first few passes off the trailer.If the Holley doesn't work out be prepared to go back to the edelbrock, the smaller cam may like the smaller cfm. The smaller cfm will increase air velocity improving fuel air mix at a lower rpm increasing low end performance helping 60 foot times and lower your E.T. Good luck let us know how it turns out. Brian
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Old 01-31-2008, 01:45 PM
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current engine is a 355 sbc. 9.5:1 454 lift and 216 duration. Trickflow aluminium heads, 180-185cc intake port. 2.02/1.60 valves.
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Old 01-31-2008, 08:10 PM
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Main thing is to know just what it is that you are putting in as far as stall speed of the converter..gearing and such..that way you have some info to work from if you need to change anything..

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Old 02-02-2008, 09:18 PM
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4 speed uses less power than th400 but it is also harder to get a good 60' with a 4 speed. the th400 will be more consistent. I run a switch pitch th400 in my Buick and get the benefits of a high stall for launching and the low stall after 60' for an additional .20 and 2 mph. Where in Oregon do you run? I run once in a while at Woodburn. Bob
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Old 02-02-2008, 09:31 PM
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What about the th375, they use a 350 pump in a 400 case right.

Shane
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Old 02-03-2008, 07:14 PM
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Don't forget to include an operable neutral safety switch so the car will not start in any gear, only Park or Neutral. If the tech inspectors at your track are worth their salt, they'll check for that.

That cam will make good power from 2,000 to 5,000 rpm's and is a good match for the 9.5 c.r. According to Crane, you could go up to 226-228 degrees @ 0.050 with the same c.r.and would make power from 3,000 to 6,000. If you do plan to go longer on the cam, I might be thinking something like a 2,800 rpm stall converter with the shorter cam so that it will also work with the longer cam later. Just my opinion.

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Old 02-05-2008, 12:46 AM
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I run on fridays at White City. Gonna try the points races this year. So I figure I need to be more consistent.
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