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Old 03-07-2011, 05:08 PM
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Need help getting the correct torque converter

A friend has a 1986 1/2 ton RC/SB pickup with a GM454 BBC. Engine has a mild Crane street cam with just a noticeable lope to it. Carries good vacuum at idle. 9.1CR, 4.11 rear end, 26" tires.

Also has a 6-71 blower with two 750 DP holleys. Max boost at WOT is 5 PSI. Truck is street driven only, no race, just a cruiser.

We are putting a 700R4 trans in it this spring and would like some suggestions on a lock-up converter.

Thanks.

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Old 03-07-2011, 05:51 PM
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I suggest a 4L80E Converter connected to a 4L80E Trans.
Or a TH400 w/Gear Vendors O/D.
http://cgi.ebay.com/ebaymotors/Gear-...item4aa93e106a

You don't know any Cam Specs?
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Old 03-07-2011, 06:02 PM
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Quote:
Originally Posted by SSedan64
I suggest a 4L80E Converter connected to a 4L80E Trans.
Or a TH400 w/Gear Vendors O/D.
http://cgi.ebay.com/ebaymotors/Gear-...item4aa93e106a

You don't know any Cam Specs?
I could find out but it's been awhile since the cam change, not sure if he kept the cam card or not. If that is a problem then that's ok, we'll figure it out.

BTW, with all do respect, I asked for converter suggestions for a 700R4, can we focus on that please.
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Old 03-07-2011, 06:40 PM
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Cam specs for the above mentioned 454 are;
Crane
.533 gross lift
.226 duration @ .050" I & E
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Old 03-07-2011, 10:00 PM
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Now that we have Info we can suggest something.
A Stock to 1000rpm above Stock stall should work fine. An off the shelf 2000-2500rpm Stall TC will probably stall to 2500-3000rpm with that engine. Will also help prevent creeping while stopped in gear.
Todd
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Old 03-09-2011, 05:03 PM
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OK, that's what I was thinking too.

Now, who has what brand of converter and why? Is it a good one? Have you beat it and it still works perfectly?

700R4 lockup converters only.
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Old 03-10-2011, 03:31 PM
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My lockup converter is designed for 2800-3200 stall. I am uncertain of the brand name, it was a $150 unit off E-bay. I have been using and beating it hard for about six years now with no problems.

Sorry I can't think of the brand name, my point in making this post is to exhibit that a high dollar unit is not always necessary.
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