th 350 stall size????

[jsk1978]

78 1 ton mildly built 454 and a th 350 my cam card said to use 3000 stall. i installed a b&m holeshot 3000 but im not happy with the performance the shifts are sluggish and it requires around 3500 to 4000 rpm to make the truck move. any suggestions would be greatly appreciated. motor is making around 450 hp 10.5 to 1 compression 049 heads and a comp286h cam

 

[dirtroadoutlaw]

Making 450 hp at what rpm? You drag racing or wanting to drive this thing?

 

[jsk1978]

Drive it! 44" tires with 513 gears. 6000 rpm max

 

[dirtroadoutlaw]

You don't need a stall greater than stock with that setup. All a stall is for is getting rpm into the power band for the most powerful launch. Worthless for a big 4x4 driver

 

[hirschdalechevy]

454 , big tire's , turbo 350 , tranny not long for this world if you drive it hard.If you are set on having a stall converter (not reconmended) you dont want a b&m , tci etc.....they are junk IMO. You need to call turbo action or continental converter's and have them build you one for your set up. Their stall converter's , (say 3000 rpm stall) are tight converter's and do not slip at lower rpm's , but when you flash them then they stall at the rpm they are built for. B&M converter's are cheap and are not tight and feel sloppy , imo.
You really need to talk to a good converter shop like the one's above and have them build you one for your application , it will be night and day difference

 

[HotRodPC]

You got to much to much converter for that set up, even if you were drag racing. Keep in mind, a 3000rpm stall rating is just that, a rating. Put that same converter with the same motor in Chevy Vega with 14in tires and it won't get but about 2500 stall cuz the car is so damn light and going to have the tendendacy to lurch or lunge. Now for you on the other hand, big ass heavy truck with big ass tires to turn, your probably not going to move until 3500-4000 and while generating an ass load of mega heat and killing your trans. You can get High Stall stock converters and that sounds about like what you need. Where stock might be 1400-1600, a stock HS conveter could be like a 1800-2000 stall and you'd probably get about 2200-2400 out of it with all the weight and tire size.

 

[HotRodPC]

454 , big tire's , turbo 350 , tranny not long for this world if you drive it hard.If you are set on having a stall converter (not reconmended) you dont want a b&m , tci etc.....they are junk IMO. You need to call turbo action or continental converter's and have them build you one for your set up. Their stall converter's , (say 3000 rpm stall) are tight converter's and do not slip at lower rpm's , but when you flash them then they stall at the rpm they are built for. B&M converter's are cheap and are not tight and feel sloppy , imo.
You really need to talk to a good converter shop like the one's above and have them build you one for your application , it will be night and day difference

I agree with this too. Avoid the out of the box cookie cutter B&M and TCI converters. I've never been impressed with any of them either. There is also a guy in Northern Cali of Edge Converters. He builds them to spec for 8 second cars, off roaders and whatever you need. You can tell him what you have and he'll build what you need. He can sure build one of those stocker HS type conveters too and beef it up.

 

[jsk1978]

Thanks guys doEs anybody know what a custom converter shop charges for one

 

[HotRodPC]

You might call a local speed shop in your local area, or stop at a local hotrod car show hangout and ask around who does converters in your area.

Are you close to Atlanta or Norcross? They have a Transtar Industries in those cities, who Build the Recon Torque Converters. Their prices are good, and I don't know of anyone who has had a problem with a Recon converter. They are cookie cutter models though. They also are more accurate on their specs. For example they don't say, we have a 3000 stall converter becuase they know of variances depending on the vehicle. They do make one that should work good for you though. It's model # is GM350HP-11 (Approx. Stall 2200-2600).
It's one of their High Performance units, hence the HP-11 and it's an 11 inch converter with a stall range of 2200-2600. THe GM350 is for GM Turbo350, not horsepower. I'd guess that you'd get closer to the 2600 with the weight and tire size. You're gear ratio will bring some of that down though, so maybe in the 2400-2500 range. They also have other stalls availalbe.
You can go here and download their catalog. Also, they come with a 3 year warranty.
http://www.transtar1.com/torque.asp

 

[HotRodPC]

Here are the Recon converter model #'s for the Th350.

GM350HP-10 (Approx Stall 3000-3400) 10inch
GM350HP-11 (Approx. Stall 2200-2600) 11inch
GM350HP-12 (Approx. Stall 1800-2200) 12inch
GM350 Stock (Approx. Stall 1400-1600) 12inch

 

[dirtroadoutlaw]

You only need enough stall to keep the truck still at idle. Just like stock. You're driving the damn thing. Who the hell wants to launch at 3 grand just to tach out at 6??? Especially in a freakin driver!

 

[jsk1978]

Yep your right it sucks as a driver but I like driving it on the road going to give a couple of these places a call and get one ordered. Thanks for the help!

 

[sean1960]

What is the bore on your 454? The bigger the bore the more it will mellow the cam requiring less stall. Your truck weighs around 6000 pounds maybe a little less, I don't think you need more than 2400 to 2600 stall if that. Just my 2 cents.

Just noticed you have 513 gears you may not need any more than a stock converter.

 

[dirtroadoutlaw]

2500-ish will be cruising-ish speed rpm with this tire/gear. The stall is not needed if you're driving this vehicle around. Hate to see you go through all that then find out it sucks to drive.... and it will. Stall converters are not made for this application at all.

 

[jsk1978]

Talked to monster trans yesterday they recommend their 2200-2500.