Transmission catch can placement

[Mark Yacavone]

Originally Posted by 1320racer

be careful of who you listen to, there's no reason to be plugging the stock vent and relocating it on your trans!

This info pertains to racers who use a T200,... not commonly used in bracket racing.

If ONE were to study the path of the fluid slung off of the direct drum and other internals, and passed through the pump and out the vent, ONE would see the problem. Those things weren't designed to spin at 7000 rpm.
Baffling the vent passage won't work because the direct spins both ways.

I have run the vent hose up to a nipple, brazed high up on the vent tube..That works fine but won't work with non OEM locking dipsticks (Yes, I said "dipsticks" in this post)

The easiest thing to do is move the vent to the rear , as was used on some of the early 200's .The boss is already there on the case.
Again , this info pertains to CLASS racers who happen to be following this thread.

Anyone needing "advising",, PM me... LOL

[1320racer]

Rich, you'll know before we know. All I can tell you is that both sides of the block are windowed.

[40Coupe]

The new trans isn't one of my home built 400's but rather a class TH350 that came with a fitting in the top rear and the factory vent was plugged.

[Dyno]

I run a line to the trunk where I have a Jeg's catch can. It helps keep the underside of the car cleaner, ProTrans 727. Dyno

[1320racer]

Originally Posted by 40Coupe

The new trans isn't one of my home built 400's but rather a class TH350 that came with a fitting in the top rear and the factory vent was plugged.

Garret, the trans most likely doesn't have a cooler circuit and would likely puke IF you ever hot lapped in competition, especially with conventional trans fluid but since you don't compete, it's not an issue.

That said, again, not one of my Rossler transmissions that I have been running since 2005 has the factory vent plugged, my transmissions retain the cooler circuit and I only run synthetic fluid, specifically Allison's TranSynd. My car(s) have been and are regularly hot lapped and my transmissions have never puked in ~5000 passes!

IMO, you're just making it harder than it has to be for what YOU have and what YOU are doing.

[buzzinhalfdozen]

40 coupe whos T-350 are you running?

[40Coupe]

The new trans does have a cooler circuit. I do plan to enter it in a bracket race or two as I do every season. There is normally little cool down time in the later rounds.

It's a Coan unit.

[HP HUNTER]

Originally Posted by 1320racer

Garret, the trans most likely doesn't have a cooler circuit and would likely puke IF you ever hot lapped in competition, especially with conventional trans fluid but since you don't compete, it's not an issue.

That said, again, not one of my Rossler transmissions that I have been running since 2005 has the factory vent plugged, my transmissions retain the cooler circuit and I only run synthetic fluid, specifically Allison's TranSynd. My car(s) have been and are regularly hot lapped and my transmissions have never puked in ~5000 passes!

IMO, you're just making it harder than it has to be for what YOU have and what YOU are doing.

Ive never puked fluid either using the stock trans cooler in the radiator, but I guess a catch can will never hurt anything. Im much more interested in what this cars going to run with the trans change and wheelie bar seeing it ran 9.40 untuned @ 1670 feet DA before these changes, should be dam interesting.

[1320racer]

nothing interesting or magical about it.. Replace a home built turbo 400 with a lite weight/low friction turbo 350 and you'll run quicker.

It's the year 2012, the parts are available to everyone with the coin to run as quick and fast as they want even those that only test/tune.

[buzzinhalfdozen]

40 coupe, got 1 of these in my car work on my buddies also. I don't run a cooler he does both units will push out a little fluid, not much but there is some. That being said I'm unsure why Coan put the vent there I'm surt there's a reason for it just don't know what that reason is. AS I've said previously I'd follow coans advice, they built the trans they know why they've done certain things, opinions are just that, until someone who runs the same stuff you're running makes a statement of FACT I'd disregard all the I'm sure well meaning "advise". If you get this thing back together as I'm led to believe you've hurt your engine, and have any issues with the trans you can PM me I don't know everything about this trans but I've figured out how to make it live for my application. Joe BTW I've found it best to run the Amsoil "super shift" fluid, clutches look like new after a season of running.