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Author Topic:   Converter for the 557?
Dave_C
Gearhead

Posts: 1069
From: Gadsden, Al
Registered: Aug 99

posted 10-31-2002 02:55 PM     Click Here to See the Profile for Dave_C   Click Here to Email Dave_C     Edit/Delete Message   Reply w/Quote
I need some input on torque converters. Almost time to order one.

Specs: 557 BBF, (4.50 X 4.440) 6.8 rods, flat top forged pistons, 12.7:1 comp. Blue Thunder aluminum heads, BBC exhaust 380/265 cfm. 2 1/4 dragster headers. Cam is 275/285@ .050, .770/.770 (.745 net after lash) 110 lobe seperation, (I can supply the other cam card info if needed) installed 2 advanced, Victor 460 intake, 1800 cfm Flying Toilet alky injection system. Trans is a 1.76 1st Powerglide, 4.10 rear gears, 33" slicks. All this in a 225" wheelbase dragster. Should be ~1875-1900 lbs w driver. It weighed 1850 with a 509 alum head BBC and a similar sized driver. Figuring extra weight here due to the 460 + filled block.

I thinking about 5100-5300 stall with about a 6500 shift point. Seem right? Do I need an 8" or race 9". I have had some people tell me that this engine will make so much torque that it will "drive through" an 8" converter, no matter how tight it is. The 9" race (not a 9" street) converter can be tighted up to where I need it.

Any ideas?
Any converter companies particular that are better than the pack? I have had good luck with 8" converters in the past from PTC in Alabama and a few friends are running BTE from Memphis with good success. How about ATI? Any experience with them? They are having a winter sale right now with some good prices.

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Moneymaker
Administrator

Posts: 27499
From: Lyons, IL, USA
Registered: May 99

posted 10-31-2002 03:58 PM     Click Here to See the Profile for Moneymaker   Click Here to Email Moneymaker     Edit/Delete Message   Reply w/Quote
The car is to light to use a 9 inch in my oppinion Dave. I don't think that you would be able to flash as quick as you need to get the car accelerating. The stall sounds about right for your combination. I would contact JPT at [email protected] or 571-663-0578

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Alex Denysenko
Co-Administrator and Moderator

NHRA/IHRA/SRA member and licensed Superstock driver
MCA member# 53321
NHRA and IHRA SS/LA National Record Holder '00, '01, & '02
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28
Professional Manwhore
The Barry of BarrysGrrl

Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"

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kid vishus
Gearhead

Posts: 6590
From: middle of NC
Registered: Oct 2000

posted 10-31-2002 04:04 PM     Click Here to See the Profile for kid vishus   Click Here to Email kid vishus     Edit/Delete Message   Reply w/Quote
If I were in thge market to buy a new convertor, there are only two places I would even consider, JPT, and Coan. JPT because of the way Alex's stuff works using them, and Coan because I have never had any problems with the Coan convertor I already own (it's perfect).

A buddy of mine with a 540 bbc has 2 convertors, an 8", and a 9" that stalls just a touch lower than his 8". He does not like the 9". It has a slower ET, but has more mph. No matter wehat he does, he cant get it to run as quick as his 8".

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Moneymaker
Administrator

Posts: 27499
From: Lyons, IL, USA
Registered: May 99

posted 10-31-2002 04:19 PM     Click Here to See the Profile for Moneymaker   Click Here to Email Moneymaker     Edit/Delete Message   Reply w/Quote
I concur with KV on the Coan product. I may not like the man personally, be he does make a great product.

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Alex Denysenko
Co-Administrator and Moderator

NHRA/IHRA/SRA member and licensed Superstock driver
MCA member# 53321
NHRA and IHRA SS/LA National Record Holder '00, '01, & '02
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28
Professional Manwhore
The Barry of BarrysGrrl

Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"

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jsracingbbf
Gearhead

Posts: 2954
From: Batesville,MS. , U.S.A.
Registered: Mar 2002

posted 10-31-2002 07:51 PM     Click Here to See the Profile for jsracingbbf   Click Here to Email jsracingbbf     Edit/Delete Message   Reply w/Quote
Dave, #1 You KNOW Kenny and his products at PTC. He is also in the neighborhood, just in case he didn't get it right ( highly unlikely ) YOU KNOW he will make it right. Also, his turn around time is great. I've seen Kenny Bring a converotr or send it by his brother to the track, on last minute's notice. I got mine from him and have never had a problem with it. Although my car is light, and makes good torque, my convertor would be WAY off for your ride. Kenny tightened up my 8 inch from 5800 stall to 4500 stall, he told me if that didn't pan out I would have to go to a 9 inch. I trust this guy alot, he has never lead me wrong. I don't know what size convertor you would need but if it were me I'd put whatever Kenny said it needed and go from there. Your convertor is going to be SUPER easy to take out anyway. Just my .02 cents

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Jerry Smith
69 Mustang Pro ET Drag
70 Mustang retired former footbrake car
"Crawfish are Lucky! they get their Heads Sucked and their tails eaten!"

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