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Is Batmbl Split Dump + Front Pipe Still Available ?

discopotato03

By discopotato03,
in Engines & Forced Induction

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discopotato03 Grand Master

discopotato03

Posted
Posted

I searched and I searched but cannot find mention of the one piece split dump and front pipe BATMBL used to advertise in the group buy section .

Are these still available or does anyone have one to sell for an S2 R33 GTS25T manual car ?

Cheers , Adrian .

JustinP Mentor

JustinP

Posted
Posted

haha I was just trying to find out if this guy still exists also. I have one which I want to sell, but unfortunately it is an R34 version. I have found it to be a great split front / dump pipe, but need to get rid of it as the new turbo I will be buying comes with a dump pipe. Now I need to find a nice stainless front pipe from somewhere.

JustinP Mentor

JustinP

Posted
Posted
Would I be right in thinking that an R33 and R34 one would be different ?

Cheers A .

From memory when I brought it, I am pretty sure they are different as he had the different options. In fact I cant remember if the 4 door and 2 door versions of the R34 version are different either (I have a 4 door).

GTScotT Grand Master

GTScotT

Posted
Posted

Purely based on products available, the r34 brings up a different listing to r32/33. Generally 32 and 33 are the same listing.

Short of the above as far as I have been following, your doing a highflow or GTRS? If so, I am confident a JJR bellmouth will not be far off the mark of the split setup. For $179 direct fit its definitely hard to argue lol.

discopotato03 Grand Master

discopotato03

Posted
  • Author
Posted

I'm going the GTRS kit route and may as well do the front pipe because ATM the turbo and back to the hi flow cat is factory .

By the way do these combined dump/front pipes support the turbo because I'm not keen to have the exhaust manifold crack and most Nissan cast dumps have some sort of bracing .

No one want to sell an R33 BATMBL split dump/front pipe ?

Cheers A .

GTScotT Grand Master

GTScotT

Posted
Posted
By the way do these combined dump/front pipes support the turbo because I'm not keen to have the exhaust manifold crack and most Nissan cast dumps have some sort of bracing .

Your running a cast manifold from factory so additional support is next to useless. Failure rate on the one piece dumps is fairly low provided you use the gearbox exhaust hanger to brace the front pipe where it meets the cat.

As I said, $179 and you cant complain lol.

wolverine Grand Master

wolverine

Posted
Posted

No you don't. :P

You want a nice fat bellmouth. Give the expanding exhaust gases the lowest pressure area to expand.

Also, you don't want issues with the gate fowling on the wastegate pipe that can be a result of the split pipes.

Beer Baron Grand Master

Beer Baron

Posted
Posted

wolverine hit the nail on it's circular, flat, top part. nice big bell mouth is the way to go. less problems with wastegate flap fouling, nice big area for gas to expand quickly give best result. :blink:

Basti Grand Master

Basti

Posted
Posted
ive got a batmbl split dump on my 33 have had it for at least 6 years, no issues and still working (ie reliable) with std turbo and setup

near on four years on mine. no issues

No you don't. :blink:

You want a nice fat bellmouth. Give the expanding exhaust gases the lowest pressure area to expand.

Also, you don't want issues with the gate fowling on the wastegate pipe that can be a result of the split pipes.

wastegate fouling = boost spiking? if so i have no wastegate issues. btmbl is good

wolverine Grand Master

wolverine

Posted
Posted

I agree, the btmbl is a good product.

Some split pipes fowl the wastegate flaps so buying one is a risk but the main reason for my opinion is based on back to back testing of split vs bellmouth. The bellmouth made more power earlier which I believe is due to having a larger chamber for exhaust gases to expand.

We have had some threads on dump design and optimal angles of expansion of pipework from the turbine outlet to get best performance, if I can dig it up I will link it.

This does not mean that a split dump is a bad option but it isn't the best option in my experience.

STATUS Grand Master

STATUS

Posted
Posted
No you don't. :blink:

You want a nice fat bellmouth. Give the expanding exhaust gases the lowest pressure area to expand.

Also, you don't want issues with the gate fowling on the wastegate pipe that can be a result of the split pipes.

Bingo the open ones seem to give better results, even on sr's.

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