Converter too tight? - Ford Mustang Forums : Corral.net Mustang Forum
 
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post #1 of 8 Old 07-04-2018, 05:31 PM Thread Starter
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Converter to tight?

I don't have a way of measuring driveshaft speed but I feel like the converter might be a tad bit too tight in my car. It's a UCC 8" which appears to stall around 5,200. The incremental's on this pass were.

1.425
4.204
6.556 @ 103.86
8.606
10.338 @129.75.

DA was 4750' which wasn't optimal. Car has been [email protected] but that short time has never been better than 1.40. I've tired anywhere from 3,000rpm to 4,600rpm on the 2 step and the only thing that changes is the wheelie. The short times don't really move much. Anyone agree that it may be a bit too tight?

14:1 363. Old school twisted wedge heads ~205cc, Anderson N-113HL cam, Box-R intake. 2,940lbs with me in it. The camera angle sucks. I short shifted the 1-2 but usually we are right around 7,500rpm on the shifts.



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'91 coupe & '93 cobra. One's quick and the other has 12k miles.

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N/A 363. Hydraulic roller cam, Twisted Wedge heads, Box-R intake. [email protected] 1.38 60'... More to come.

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Last edited by Jesse H; 07-05-2018 at 06:39 AM.
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post #2 of 8 Old 07-05-2018, 01:23 AM
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Interested in this, I’m new to auto’s and am still learning the looseness and tightness of a converter and how it affects the run.

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post #3 of 8 Old 07-05-2018, 12:10 PM
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whats it dropping on the shift RPM wise?

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post #4 of 8 Old 07-05-2018, 02:27 PM Thread Starter
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Originally Posted by SRTthis798 View Post
whats it dropping on the shift RPM wise?
1400rpm on both the 1-2 and 2-3.


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'91 coupe & '93 cobra. One's quick and the other has 12k miles.

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N/A 363. Hydraulic roller cam, Twisted Wedge heads, Box-R intake. [email protected] 1.38 60'... More to come.

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post #5 of 8 Old 07-06-2018, 07:39 AM
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id talk to [email protected] and see what he thinks. thats more drop than id like for sure.

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post #6 of 8 Old 07-06-2018, 08:03 AM Thread Starter
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id talk to [email protected] and see what he thinks. thats more drop than id like for sure.
That was going to be my next step but I figured I'd see if it was a blatantly obvious yes or no from others 1st. Without driveshaft rpm I didn't really want to waste his time as I bought the converter used. It was out of a bigger power N/A Windsor so it would only make sense to be a little tight I guess...?


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'91 coupe & '93 cobra. One's quick and the other has 12k miles.

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N/A 363. Hydraulic roller cam, Twisted Wedge heads, Box-R intake. [email protected] 1.38 60'... More to come.

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post #7 of 8 Old 07-06-2018, 08:12 AM
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Quote:
Originally Posted by Jesse H View Post
That was going to be my next step but I figured I'd see if it was a blatantly obvious yes or no from others 1st. Without driveshaft rpm I didn't really want to waste his time as I bought the converter used. It was out of a bigger power N/A Windsor so it would only make sense to be a little tight I guess...?
yup if it was built for a motor making more power it would be to tight.

most guys i know shoot for around 800-900 RPM drop on the shift

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post #8 of 8 Old 07-09-2018, 09:41 AM
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Yeah a little tight. Stall speed is probably close, assuming a 3 speed. Not knowing which stator is in the converter, it's likely that a stator change is all that's needed.
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