[Bowtieman427]

72 Chevelle 557 BBC 265i 271e @ 0.050 .725 lift. AFR 335 CNC, Holley 1000HP TH400 no trans brake, B&W cooler 11x10" and deep AL TCI finned pan, Strange S-60 DL 4.10 gear, 28" tire, Gear Vendor Overdrive which will only be used on highway 65+ MPH
Issue with GVOD cruise RPM will be between 2500-3000RPM. I attatched engine Dyno also. This will be mostly street track 5x year, but most miles will be on Highway getting to events will not trailer to track.
Talked to 3 different vendors today
1) Get rid of GVOD it is a POS and run an 8" converter "TreeMaster" ATI Custom
2) You will be fine with GVOD we have great converter for what want and should not have any issues ours is super effecient and built like a tank Custom 10" (258MM) MAXIMUM PERFORMANCE CONVERTER Coan
3) Nitro 10" "10" Race Torque Converter " since it mostly street & GVOD will be fine. Off shelf
4) Street fighter ultimate TCI offshelf. I even told TCI I do not want any street fighter anything : )

Each telling me something different. Looking for effecincy and do not want to kill tranny. Currently leaning toward Coan if what they say is true.

Sorry I could not figure out how to move the .pdf over here. Dyno is on page 2 of this URL
http://www.chevelles.com/forums/showthread.php?t=332751

 

[brngrhd]

Butch i got this........... 8" ATI 5200 stall.

[/thread]

Seriously though that is not to far off of what will be said and you do have a pretty health cam, but with those cubes, power, and gear you just don't need that much converter....... Unless all you care about is the strip numbers. 3500 stall would be fine IMHO

 

[brngrhd]

Damn that thing is making a ton of torque even 3000 would be fine just about 700ft/lbs at 4000....... if it hooks it is going OTB or breaking something lets see 700ft/lbs 4.10 and torque multiplication from the converter.......

 

[GRN69CHV]

Some comparative info for you. Have a new 540 sitting on the stand, little milder than your's.

540, Dart 310's, 242/249, 650/.650,112 LSA cam. T400, 3.42 gears. Motor will use the same 9.5" (245mm) 3000 stall that I had behind the 469" motor, need to drop the converter off for freshen up (strictly precautionary maintenance). FWIW, 469 had the same heads , ran it with two different cams , a 234/244, .610/.632 and a 245/252, .650/.650. 469 had 3.73 gears behind it. Car was absolutely useless on street tires on the street or drag radials on anything less than a well prepped track. Point I wanted to make was, good smaller diameter converters "hit" the tires very hard. Best way I can describe it is, nailing it off idle, I feel it hits as hard as dropping a clutch. You are packing a lot power with a lot of gear, give it some thought. If it were me (OD or not), I'd be thinking about a swap to a lot less gear and a good tight converter 2800-3000 stall with anti-balloon plates.

 

[69 Ratt Vette]

I think the best dollar for dollar converter on the market is an Edge.

 

[superstocker72]

what converter do you have now, and what do you not like about it?

 

[crazydavey]

72 Chevelle 557 BBC 265i 271e @ 0.050 .725 lift. AFR 335 CNC, Holley 1000HP TH400 no trans brake, B&W cooler 11x10" and deep AL TCI finned pan, Strange S-60 DL 4.10 gear, 28" tire, Gear Vendor Overdrive which will only be used on highway 65+ MPH
Issue with GVOD cruise RPM will be between 2500-3000RPM. I attatched engine Dyno also. This will be mostly street track 5x year, but most miles will be on Highway getting to events will not trailer to track.
Talked to 3 different vendors today
1) Get rid of GVOD it is a POS and run an 8" converter "TreeMaster" ATI Custom
2) You will be fine with GVOD we have great converter for what want and should not have any issues ours is super effecient and built like a tank Custom 10" (258MM) MAXIMUM PERFORMANCE CONVERTER Coan
3) Nitro 10" "10" Race Torque Converter " since it mostly street & GVOD will be fine. Off shelf
4) Street fighter ultimate TCI offshelf. I even told TCI I do not want any street fighter anything : )

Each telling me something different. Looking for effecincy and do not want to kill tranny. Currently leaning toward Coan if what they say is true.

Sorry I could not figure out how to move the .pdf over here. Dyno is on page 2 of this URL
http://www.chevelles.com/forums/showthread.php?t=332751

can't speak for the others Jim but I ran that Coan when the car was mostly steet and loved it....Dave

 

[Bowtieman427]

It currently has a TCI 3500 stall TCI 241001 streetfighter with anti baloooning plate. My concern with this new setup with tons of torque and HP and running GV OD. I do not think the street fighter is a good solution. I would like something that will handle to additional power not be slipping all the time heating up and burning up my tranny and work with the GVOD. I think the 3500 stal would be fine but no expert. I have not talked stall with the vendors yet jsut shocked on the variable replies and curious what is the best direction. I like ATI but they do not like the GVOD.
I think the TCI I have would be good in a Lower HP torque application.

 

[GRN69CHV]

I had that same TCI converter ( without the ballon plates) behind a 408" oval port motor. Later had it restalled down to 3000 stall for a 460" oval port motor. Worked ok, but the 9" (245mm core) at the same 3000 stall is a completely different hit.

 

[Rmchevelle]

Talked to 3 different vendors today
1) Get rid of GVOD it is a POS and run an 8" converter "TreeMaster" ATI Custom

ATI told you the GVOD was a POS???? Their exact words????

 

[Bowtieman427]

Pretty close "They said it is junk & they use to use them but they are really not good for the drivetrain system especially with the engine I have. " I believe I talked to John left notes at work.
Steering me toward getting rid of GV and get a nice tight 8" Treemaster and converter should be built for the the 4.10 gear torque curve and cam selection. He went on to tell me the engine will run a lot better and be better off without GV unit. Got the Gear vendor 2 reasons out here in MN the speed limit is 75 on Intersate and on US highways everwhere else. Can typically go on 75-100 mile crusies to shows strip and what not and figure I can turn a little lower RPM and save a little wear and tear and some gas : ) plus be a little better prepared for the Viper, or Vette encounter. I could hang with them for a little bit ; ) I am not planning on crusing around town in OD.

Now I understand where they are coming from for optimum performance they are right, but while cruising between 65-75 not really looking to be right there on power band. I am sure my setup would like more RPM and would run better turning 3500-4000 RPM less loading issues etc, but hoping to reach some middle ground here with converter selection to insure no tranny issues and be there when I need it.
Have cake and eat it too.

According to Coan there converter is great : ) on the strip/ street and I should not have an issue. It was designed for us crazy people that put super crazy BBC in street driven cars. talked to Craig. He liked to talk a lot.
have not talked to Edge yet I will give them a call tomorrow.

 

[46872chevelle]

I think the best dollar for dollar converter on the market is an Edge.

X2:yes::thumbsup:

 

[forcd ind]

several schools of thought on this-a converter that would do your combo proud prob would show some elevated heat if the engine wasnt spun up tighter
Gear Vendors will tell you guys run drag week with them
if you get to tight a converter, you could get some banging into gear, maybe drop in idle in gear, creep
what does the car idle at now, and idle vacume
i was gonna get a Gear Vendors, thought hard about it, but in the end i went with another 4L80E-you dont realize how much slip there is from a looser converter, when i would go into lockup, it hit hard, almost like a power shift on a 4 sp
if you already have the GV, i would prob just go with a converter built for the engine, maybe a tad tighter, add a second trans cooler, the finned pan should help, adds strength to the trans also

 

[Bowtieman427]

Talked Andre at Edge very nice person. He thinks 3000 or 3200 would work great for my application. Coan thinks 3800 -4000 RPM would work better. Form what I am gathering from this post I really do not need much stall at all. 3000-3200 would be plenty enough and one school of thought. This may be the better solution for the the street machine. Lets face it street machines do not typically cruise around with full race slicks. I will have drag radials which it sounds like i will have my hands full with them. Please help me get this
1) Lower stall should help with hooking up ?
2) Lower stalls typically have better high end effeiciancy ?
3) Lower stall less likley to have slipage issues down low?
4) Lower stall may clunk into gear and not and want to lerch forward ?
5) With my setup the lower stall should work fine at the track higher stall would give me a better launch with the torque. My luanch should still be pretty good with lower stall ?
I get the impression from Andre if there is any issues at all he will make it right.
Anybody who runs edge please chime in lmk your thoughts, what if any issues you have had and how well was it resolved, what you have and if you are happy or not.
How does edge compare to other Converters. ATI, COAN to name a few.

 

[rustbucket79]

My answer doesn't help you now since you have big $$$ in the trans and overdrive, but I would have suggested the 4L80E with a lockup torque converter, hopefully in the 3500 RPM range. Best of all worlds.

Any company that recommends an 8" torque for a street/strip car with an overdrive is smoking crack. You'll have so much slippage it won't be funny.

 

[GRN69CHV]

You are going to have your hands full getting it to hook on drag radials (at least my experience on running a MT 275-60) on anything but the absolute best prepped track. Tight 3000 stall is more than enough. If you can get it built on the 245mm core (they call it a 9.5"), do so. Otherwise, the 258mm core is fine, but that slightly smaller core just hits a little harder and winds up a little tighter up top. My 245mm 3000 stall converter will drop the motor from 1000 rpm idle to just around 925 in gear. This was with the 469" motor pulling 11" vac at idle in gear. Lot depends on how stable your idle is to start with and how smooth you want the car to idle in gear. I will be using the same converter behind my 540", actually dropping it off today to have it serviced as preventative measure.

 

[69 Ratt Vette]

I have run an Edge in my Top Sportsman / A-gas car for 3 seasons. I have hit it with 1500 hp a few times and it has seen 1200 + literally hundreds of times, car goes sub 1.10 60' almost every launch at almost 2600 lbs. Converter has never wimpered. I send it back to Andre every 100 runs or so for a re-fresh (free of charge) I tried a high dollar converter a few months ago, car slowed down .06 at the 330. That converter is now for sale.

Andre's customer service is 2nd to none.

Here is a little video of us beating on one Andre's converter. These were 1400 hp hits. Tires were getting a little onld so the 60's were slightly off.

 

[GRN69CHV]

Jim, Update for you. Took my converter to Trans Spec this AM to look at getting it serviced and mod'd with anti-balloon plates and possibly restalled. By the time we got done, cost would be very close to a new unit. Ended up picking up one of their 10" XHD Street/Strip converters w/balloon plates. Told them where I wanted it, zeroed in on the XLS with a stall range of 2700-2900 behind the 540". Converter is rated to 850 HP. Can tell you, their website is not up to date. They have many options in both sprag and spragless race converters.

 

[Bowtieman427]

Thanks for the update. I hope your 540 screams when you are done that is a low stall will there be any concern with the car wanting to lurch forward all the time ?

 

[GRN69CHV]

No, keep in mind, I built my 540" to be a little tamer at idle. But, I did ask them that, was told it would great with a 900-1000 idle. Only has a 242/249 on 112lsa hyd roller. So, may not even idle that high. After a lot of back and forth, I did decide to also run a single plane intake, picked up a new Weiand 7622 for a song, so gonna run that. Despite the smaller cam ( which I wanted for idle quality), my intent with the tighter converter and single plane is to kill some low end power delivery to the wheels, if that makes sense, and let the motor carry the car. Have to figure, 540" will be bad enough, but your 557" motor will have as much torque at 3000 as a typical 454 does as peak. Gonna be a handful to get that power to the ground, no two ways about it. Won't kid you, this is my first foray into a stroker motor, completely unchartered territory. We'll compare notes as these get installed.