how do i know what to pick with a converter

79transam · 04-10-2012, 08:56 PM

im going to buy a new bte converter. everyone i talked to says i need a 5500 stall. my trans guy is wanting me to get a 5000 stall. i run a 434 sbc in a 79 transam, i run a glide with a brake, shift at 6500 launch at 3500 i have a lunati solid roller cam the duration at 50 is 276/284 gross lift is 640/645 rpm range 4400-7800. ive never weighed the car but would guess around 3k. im lost with this. ive tried finding stuff on the net to read but its like a soup recipe everyone has a different opinion, if i go with the 5k what is the adverse affect of this? same with the larger stall. thanks for all your guys help i needed some expert advise so i came to the experts.

Phillip marvetz · 04-10-2012, 11:19 PM

I would ask the people at BTE.

J Giermanski · 04-15-2012, 05:10 AM

Save yourself alot of time and headache. Just call Lenny from Ultimate Converters and be done with it.

Dave Ribeiro · 04-16-2012, 12:18 AM

Double X , what J. Giermanski said .... Lenny is the Man ....

Rob Petrie E395 · 04-17-2012, 11:51 PM

What do you guys suggest to do if you do not have any where to put a engine on a dyno. I figured with as many LT1 camaro/firebirds are out there somebody would have something close. Then have it put on a chassis dyno and if I had to send it back to be adjusted.

rustbucket79 · 04-10-2012, 11:29 PM

Quote:

Originally Posted by 79transam

im going to buy a new bte converter. everyone i talked to says i need a 5500 stall. my trans guy is wanting me to get a 5000 stall. i run a 434 sbc in a 79 transam, i run a glide with a brake, shift at 6500 launch at 3500 i have a lunati solid roller cam the duration at 50 is 276/284 gross lift is 640/645 rpm range 4400-7800. ive never weighed the car but would guess around 3k. im lost with this. ive tried finding stuff on the net to read but its like a soup recipe everyone has a different opinion, if i go with the 5k what is the adverse affect of this? same with the larger stall. thanks for all your guys help i needed some expert advise so i came to the experts.

I presume the 4400 to 7800 RPM range is in reference to the cam manufacturer's suggestion rather than your engine's actual powerband.

I've always had good results choosing a stall somewhere between 1500 and 2000 lower than peak engine RPM. Also, better to stay with a more efficient (tight) 8" converter that can be restalled higher if required rather than a loose 10" converter that's maxed out and has horrible slippage numbers down track.

Do you have a dyno sheet?

rallye bob · 04-11-2012, 05:05 AM

Shift at 6500, in a sbc?

Greg Hill · 04-11-2012, 06:52 AM

Call Charlie Plott at ATI. Your stall speed will depend on if you're going for maximum performance or something else.

Ed Wright · 04-11-2012, 09:18 AM

Quote:

Originally Posted by greg hill

call charlie plott at ati. Your stall speed will depend on if you're going for maximum performance or something else.

x200!!

Ron Middleton · 04-11-2012, 10:42 AM

Talk to Bubba Stanton at BTE and follow his recommendation. They've built many convertors for your type application and they do a real good job of it. I've sold quite a few of their converters and never a problem. JMT.

04-10-2012, 08:56 PM	#1
79transam Junior Member Join Date: Aug 2011 Posts: 22 Likes: 0 Liked 0 Times in 0 Posts	how do i know what to pick with a converter im going to buy a new bte converter. everyone i talked to says i need a 5500 stall. my trans guy is wanting me to get a 5000 stall. i run a 434 sbc in a 79 transam, i run a glide with a brake, shift at 6500 launch at 3500 i have a lunati solid roller cam the duration at 50 is 276/284 gross lift is 640/645 rpm range 4400-7800. ive never weighed the car but would guess around 3k. im lost with this. ive tried finding stuff on the net to read but its like a soup recipe everyone has a different opinion, if i go with the 5k what is the adverse affect of this? same with the larger stall. thanks for all your guys help i needed some expert advise so i came to the experts.

04-10-2012, 11:19 PM	#2
Phillip marvetz Senior Member Join Date: Oct 2008 Location: Lynden ,WA Posts: 820 Likes: 0 Liked 3 Times in 3 Posts	Re: how do i know what to pick with a converter I would ask the people at BTE. __________________ 2009 V/SA Record Holder

04-15-2012, 05:10 AM	#3
J Giermanski Junior Member Join Date: Sep 2008 Posts: 43 Likes: 1 Liked 4 Times in 2 Posts	Re: how do i know what to pick with a converter Save yourself alot of time and headache. Just call Lenny from Ultimate Converters and be done with it.

04-16-2012, 12:18 AM	#4
Dave Ribeiro VIP Member Join Date: Sep 2002 Location: Williamsburg, Va.---USA Posts: 1,827 Likes: 1,612 Liked 56 Times in 27 Posts	Re: how do i know what to pick with a converter Double X , what J. Giermanski said .... Lenny is the Man .... __________________ Dave Ribeiro 1033 STK Last edited by Dave Ribeiro; 04-16-2012 at 12:21 AM.

04-17-2012, 11:51 PM	#5
Rob Petrie E395 VIP Member Join Date: Dec 2007 Location: Woodlawn IL Posts: 1,092 Likes: 162 Liked 216 Times in 77 Posts	Re: how do i know what to pick with a converter What do you guys suggest to do if you do not have any where to put a engine on a dyno. I figured with as many LT1 camaro/firebirds are out there somebody would have something close. Then have it put on a chassis dyno and if I had to send it back to be adjusted.

04-11-2012, 05:05 AM	#7
rallye bob Member Join Date: Sep 2006 Location: Genoa, Illinois Posts: 489 Likes: 9 Liked 6 Times in 4 Posts	Re: how do i know what to pick with a converter Shift at 6500, in a sbc?

04-11-2012, 06:52 AM	#8
Greg Hill VIP Member Join Date: May 2006 Location: Louisville , KY Posts: 1,995 Likes: 68 Liked 279 Times in 68 Posts	Re: how do i know what to pick with a converter Call Charlie Plott at ATI. Your stall speed will depend on if you're going for maximum performance or something else. __________________ Greg Hill 4171 STK

04-11-2012, 10:42 AM	#10
Ron Middleton Member Join Date: Jan 1970 Location: Jackson, Ms. Posts: 350 Likes: 183 Liked 12 Times in 4 Posts	Re: how do i know what to pick with a converter Talk to Bubba Stanton at BTE and follow his recommendation. They've built many convertors for your type application and they do a real good job of it. I've sold quite a few of their converters and never a problem. JMT. __________________ #4892 J/SA. We are what we repeatedly do. Excellence then, is not an act, but a habit.” - Aristotle