Stall speed
Le Mans Master
Joined: May 2006
Posts: 9,993
Likes: 1,136
From: League City Tx
With that cam and engine combo, it will certainly run fine with a stock 13" converter....(which will stall around 1600-1700 rpms, basically nothing)...
It will idle and drive fine like that.
HOWEVER, you will definitely gain some acceleration with a real converter. A quality converter spec'd for your combo is the way to go. Usually a "2500 stall" will flash to about 2800-3000 behind a torquey 383...and that is the route I would go..
Even a bone stock 350 will gain .5 in the 1/4 mile going with a correctly matched stall speed converter.
With 3.08s, you'll want to stay conservative on the stall speed and only buy from a reputable converter company it keep it efficient around town. Once you put the 3.70s in it, its going to tighten the converter up around town.
I recently put an off the shelf HUGHES GM25 ("2500 stall") in a 70' SS Nova with a mild 358" and 3.73 gears, and even that converter is looser then I thought it would be around town. Its quite liveable and very peppy around town...But with 3.08s it would probably be too loose for most.
I recommend you contact FTI, have them spec you one of these:
http://ftiperformance.com/Economy-St...-TH400-ESR.htm
It will idle and drive fine like that.
HOWEVER, you will definitely gain some acceleration with a real converter. A quality converter spec'd for your combo is the way to go. Usually a "2500 stall" will flash to about 2800-3000 behind a torquey 383...and that is the route I would go..
Even a bone stock 350 will gain .5 in the 1/4 mile going with a correctly matched stall speed converter.
With 3.08s, you'll want to stay conservative on the stall speed and only buy from a reputable converter company it keep it efficient around town. Once you put the 3.70s in it, its going to tighten the converter up around town.
I recently put an off the shelf HUGHES GM25 ("2500 stall") in a 70' SS Nova with a mild 358" and 3.73 gears, and even that converter is looser then I thought it would be around town. Its quite liveable and very peppy around town...But with 3.08s it would probably be too loose for most.
I recommend you contact FTI, have them spec you one of these:
http://ftiperformance.com/Economy-St...-TH400-ESR.htm
Last edited by ajrothm; Jan 5, 2018 at 11:04 AM.
Thread Starter
Safety Car
Joined: Jan 2008
Posts: 3,792
Likes: 428
From: Aarhus, Denmark
With that cam and engine combo, it will certainly run fine with a stock 13" converter....(which will stall around 1600-1700 rpms, basically nothing)...
It will idle and drive fine like that.
HOWEVER, you will definitely gain some acceleration with a real converter. A quality converter spec'd for your combo is the way to go. Usually a "2500 stall" will flash to about 2800-3000 behind a torquey 383...and that is the route I would go..
Even a bone stock 350 will gain .5 in the 1/4 mile going with a correctly matched stall speed converter.
With 3.08s, you'll want to stay conservative on the stall speed and only buy from a reputable converter company it keep it efficient around town. Once you put the 3.70s in it, its going to tighten the converter up around town.
I recently put an off the shelf HUGHES GM25 ("2500 stall") in a 70' SS Nova with a mild 358" and 3.73 gears, and even that converter is looser then I thought it would be around town. Its quite liveable and very peppy around town...But with 3.08s it would probably be too loose for most.
I recommend you contact FTI, have them spec you one of these:
http://ftiperformance.com/Economy-St...-TH400-ESR.htm
It will idle and drive fine like that.
HOWEVER, you will definitely gain some acceleration with a real converter. A quality converter spec'd for your combo is the way to go. Usually a "2500 stall" will flash to about 2800-3000 behind a torquey 383...and that is the route I would go..
Even a bone stock 350 will gain .5 in the 1/4 mile going with a correctly matched stall speed converter.
With 3.08s, you'll want to stay conservative on the stall speed and only buy from a reputable converter company it keep it efficient around town. Once you put the 3.70s in it, its going to tighten the converter up around town.
I recently put an off the shelf HUGHES GM25 ("2500 stall") in a 70' SS Nova with a mild 358" and 3.73 gears, and even that converter is looser then I thought it would be around town. Its quite liveable and very peppy around town...But with 3.08s it would probably be too loose for most.
I recommend you contact FTI, have them spec you one of these:
http://ftiperformance.com/Economy-St...-TH400-ESR.htm
I know he (Peter) will read this thread tonight.
Funny you say FTI, I got this reply from FTI yesterday regading the converter I need for my sbc 427 for my 69 Coupe.
04-01-2018 19:26.
Good evening John. For your car the single clutch is more than enough and it will bolt up to your factory flexplate with no problem.
For a well street mannered converter that will still have a nice 0-60 feel i would go with our SRLT0082. If you want one that is more street minded and a little of the 0-60 performance i would recommend our SRLT3082.
Dalton Samuel
Media & Internet Sales
1815 Patterson Ave, Deland, FL, 32724
Mon-Thur 8:00AM to 5:30PM EST
Friday 8:00AM to 3:00PM EST
Phone: 386-736-5816
Fax: 386-734-0273
E-Mail: media@ftiperformance.com
Le Mans Master
Joined: May 2006
Posts: 9,993
Likes: 1,136
From: League City Tx
Thx for your reply.
I know he (Peter) will read this thread tonight.
Funny you say FTI, I got this reply from FTI yesterday regading the converter I need for my sbc 427 for my 69 Coupe.
04-01-2018 19:26.
Good evening John. For your car the single clutch is more than enough and it will bolt up to your factory flexplate with no problem.
For a well street mannered converter that will still have a nice 0-60 feel i would go with our SRLT0082. If you want one that is more street minded and a little of the 0-60 performance i would recommend our SRLT3082.
Dalton Samuel
Media & Internet Sales
1815 Patterson Ave, Deland, FL, 32724
Mon-Thur 8:00AM to 5:30PM EST
Friday 8:00AM to 3:00PM EST
Phone: 386-736-5816
Fax: 386-734-0273
E-Mail: media@ftiperformance.com
I know he (Peter) will read this thread tonight.
Funny you say FTI, I got this reply from FTI yesterday regading the converter I need for my sbc 427 for my 69 Coupe.
04-01-2018 19:26.
Good evening John. For your car the single clutch is more than enough and it will bolt up to your factory flexplate with no problem.
For a well street mannered converter that will still have a nice 0-60 feel i would go with our SRLT0082. If you want one that is more street minded and a little of the 0-60 performance i would recommend our SRLT3082.
Dalton Samuel
Media & Internet Sales
1815 Patterson Ave, Deland, FL, 32724
Mon-Thur 8:00AM to 5:30PM EST
Friday 8:00AM to 3:00PM EST
Phone: 386-736-5816
Fax: 386-734-0273
E-Mail: media@ftiperformance.com
Yeah I usually use Justin @ FTI.. He custom spec's everything. Their customer service is excellent, and they give you one free restall if you don't like how it performs. A great company to deal with.
PTC is another good one.
Thread Starter
Safety Car
Joined: Jan 2008
Posts: 3,792
Likes: 428
From: Aarhus, Denmark
That would be expensive for me living in Denmark, Europe :- ((
Race Director
Joined: May 2005
Posts: 10,674
Likes: 122
From: Millington Illinois
St. Jude Donor '08-'09
Team Owner
Joined: Apr 1999
Posts: 21,953
Likes: 1,444
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
A light weight TC is like a light weight flywheel. that is why I used 9.5 TC inch for 100,000 miles on my Vette.
Modern highly efficient TC's don't have any much slip cruising down the road, but when you floor it you are instantly in the power band.
You buy a TC for the life of the car. So at some point the motors are going to get a hotter cam. I started out with a 3500 stall behind my 383 and when I installed my first 427 it jumped up to 3800 because of the additional TQ
http://www.converter.com/vigilante.htm
Modern highly efficient TC's don't have any much slip cruising down the road, but when you floor it you are instantly in the power band.
You buy a TC for the life of the car. So at some point the motors are going to get a hotter cam. I started out with a 3500 stall behind my 383 and when I installed my first 427 it jumped up to 3800 because of the additional TQ
http://www.converter.com/vigilante.htm
Le Mans Master
Joined: Oct 2010
Posts: 6,922
Likes: 839
From: melbourne florida
2023 C3 of the Year Finalist - Modified
I was a friend of Jim Beatty years ago ,he was the godfather of convertors ran ATI until he passed I always used stuff he built for me. He finally told me I needed a Lenco trans .he made great stuff
Now I live in Florida FTI is up 95 about an hour they have a great reputation . I told them what I wanted and they nailed it. I can't recommend anyone more highly.
Now I live in Florida FTI is up 95 about an hour they have a great reputation . I told them what I wanted and they nailed it. I can't recommend anyone more highly.
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Team Owner
Joined: Jun 2001
Posts: 43,136
Likes: 155
From: Thomson Georgia
Agree. Unless the new cam says higher stall, the stock 2000rpm converter in your vette will launch hard. It will even like the better gears. Save yourself the added heat unless you need an even harder launch. But, you may have more breakage (half shafts, diff, etc.) to consider if you boost stall speed above 2000rpm.
I run 2000rpm stall with 700R4, retro roller cam, 3.54 gears in my warmed over L48 (haven't installed the 4-bolt yet). It launches HARD (good) from a dead stop and runs like a scalded dog. Barks/spins thru 1-2 shift too.
I run 2000rpm stall with 700R4, retro roller cam, 3.54 gears in my warmed over L48 (haven't installed the 4-bolt yet). It launches HARD (good) from a dead stop and runs like a scalded dog. Barks/spins thru 1-2 shift too.
Mine is almost identical except for a 2500 stall and 3:73 gears.
