Converter flash point and stall correlate?

[chevyburnout1]

I'm curious if the converter flash point coincides with the stall. Basically what I mean is if the stall is raised does the flash point raise as well? My truck only sees about 15% racing time, where as the rest is just a normal daily driver. I just switched to a 1055 from a 1056 and the stall and coupling is great for launching, but I feel like if I got the flash raised another 200-300rpm it would drastically improve daily driveability and smokeless spoolup for normal acceleration. In fact I think my flash was higher with the 1056 and larger chargers.

Would going to a more loose converter help the flash point? I assume I would be sacrificing coupling if I went too loose for my chargers... Or should I just admit I'm getting old and downsize my small charger?

 

[mike diesel]

That's why i ditched my 1055. Says it is a 2400 stall but I couldn't get it to stall very easy. It flashed at 1400 rpm almost exactly like my 1900 stall precision ml did. The 1055 coupled very well though but I couldn't do squat with it trying to spool an s472/87/1.0.

Switched to a 1053 2800 rpm stall and oh boy I love it. Flashes at 1900 rpm and lights my turbo no problem.

 

[WVRigrat05]

What's this flash shit?

 

[chevyburnout1]

Switched to a 1053 2800 rpm stall and oh boy I love it. Flashes at 1900 rpm and lights my turbo no problem.

Andrew from Suncoast almost had me go that route. And this was back when I had 72/94 compounds. I was deathly afraid I had gone too loose when I assembled everything back together with smaller chargers.

What's this flash shit?

When you stab the throttle in gear, where the RPM's will immediately jump up to.

 

[S Phinney]

There is a corelation with both. The stator impacts the flash as well. A great coupling convertor may not feel as loose as say a stock convertor. My stock 02 feels looser with a quick stab on the throttle than my custom 1055. That's because the stock one doesn't couple worth squat. Plus it has 432k on that tranny and convertor.

 

[mike diesel]

Andrew from Suncoast almost had me go that route. And this was back when I had 72/94 compounds. I was deathly afraid I had gone too loose when I assembled everything back together with smaller chargers.

After these last few months of experimenting, I'd rather have more stall than I need than not enough stall. The 1055 did ok on the stock motor 17.5:1 compression but was still slow to come up. Once I did 16:1 compression in my new motor, I lost any ability the 1055 gave me of spooling on the line. Flash and stall were simply too low.

 

[chevyburnout1]

So I wouldn't be crazy to drop some more coin on a restall again? You do have me basically convinced on the 1053. With 85% of it's life on the street I want no smoke coming out of this thing with normal acceleration, and it sounds like that flash should work perfect. My setup has always seemed to like RPM. I'm going to have my tuner run through the tune one more time and if I'm still not happy I'll step up.

 

[mike diesel]

What new charger are you swapping too?

 

[chevyburnout1]

I already swapped. I had the 72/94 combo out getting rebuilt when I had the converter restalled to a 1055. The turn around was fantastic from Suncoast vs my turbo company so I already had the converter back and installed when I got a call and we decided to downsize to my current setup of a 67/88.

 

[Chevy1925]

where you live and what your running, rpm is your best friend lol.

 

[chevyburnout1]

Well nuts, and just when I made it a week without having to work on the truck. At least I'm back to tinkering instead of repairing! :roflmao:

 

[othrgrl]

Precision makes a converter for us that will flash to 2500 but couple so aggressively that if you keep traction it will drag RPM down as it loads the motor. 4H with the brakes planted it'll stall right to 3000 RPM and come up to 3200-3300 if you try for a second. I run it on our shop work truck that we haul with that has a "stockish" Danville charger, all the way up to my truck with an S480 single on it. Customers with S400s that complain of drivability and have too tight a converter usually want one as soon as they go for a ride in my truck. The coupling is good enough to pull the trailer up a decent incline at idle. Don't know how Terry did it, but I haven't found another converter like it yet.

 

[DMAXchris]

I need a looser converter.

 

[Evan@InglewoodTrans]

If you call Suncoast you can have a custom converter made up for your application.

 

[chevyburnout1]

I've always ran Suncoast and haven't had a problem with them. Just drove the truck at lunch and it only flashes to about 1400-1500. I find myself manually holding gears a lot so if I do decide to pull the converter I'll give Andrew a call and see if he still recommends the 1053. I really don't think I need to dump a bunch of money into a custom converter as this truck is just a fun little weekend racer. Still daily drives and hauls a trailer and camper here and there. I care more about the daily smiles I get driving it than the few times it makes it to the track.

 

[Evan@InglewoodTrans]

I've always ran Suncoast and haven't had a problem with them. Just drove the truck at lunch and it only flashes to about 1400-1500. I find myself manually holding gears a lot so if I do decide to pull the converter I'll give Andrew a call and see if he still recommends the 1053. I really don't think I need to dump a bunch of money into a custom converter as this truck is just a fun little weekend racer. Still daily drives and hauls a trailer and camper here and there. I care more about the daily smiles I get driving it than the few times it makes it to the track.

I've never been charged anymore then normal for custom converters.

 

[chevyburnout1]

I've never been charged anymore then normal for custom converters.

Well that's awesome to hear! I've never dealt with custom converters before. If they run a similar price I'll definitely look into that!

 

[othrgrl]

If you call Suncoast you can have a custom converter made up for your application.

I am not knocking SunCoast at all - use their parts in my builds and keep their kits and some converters in stock. I don't have issues with their converters, but I also can't say I've never hurt one. They have always taken good care of me, and I have no complaints. Back when I asked Terry to build me what became the DA converter it was because Ron didn't seem very interested in deviating from the standard 105X line up to build me what I was after. Terry was excited to have someone that wanted to try a new combination of parts to see how they worked together and when it worked out so great and has since been upgraded to a billet stator, I haven't had a reason to have SunCoast try to duplicate it for me.

 

[Evan@InglewoodTrans]

I am not knocking SunCoast at all - use their parts in my builds and keep their kits and some converters in stock. I don't have issues with their converters, but I also can't say I've never hurt one. They have always taken good care of me, and I have no complaints. Back when I asked Terry to build me what became the DA converter it was because Ron didn't seem very interested in deviating from the standard 105X line up to build me what I was after. Terry was excited to have someone that wanted to try a new combination of parts to see how they worked together and when it worked out so great and has since been upgraded to a billet stator, I haven't had a reason to have SunCoast try to duplicate it for me.

I never said you were knocking Suncoasts converters. I was just letting the OP know he had other options then the normal Suncoast line up because most people don't. Every company has failures but I've yet have any other converter hold up in big power apllications like a few of Suncoasts offerings.

 

[othrgrl]

I never said you were knocking Suncoasts converters. I was just letting the OP know he had other options then the normal Suncoast line up because most people don't. Every company has failures but I've yet have any other converter hold up in big power apllications like a few of Suncoasts offerings.

I know you weren't accusing me of that, but wanted anyone that read my post to be clear that I'm not saying that Precision is the be all end all or anything, just that they make one for me that I am very happy with.