[supercoopers]

For those interested, here is the link to NAM where a user there has gotten through 2 Milltek manifolds in the space of a few months. He has now junked them and gone and bought a Mini-Madness header (jet-coated as well!). The only pattern I see with this guy's problems is that the Milltek doesn't work very well in the long term with extensive mods (head/cam/throttle body etc). If you look at the Milltek port openings, they are actually as small as stock and do not extend to the gasket. I realise that you do want a little bit of a difference in diameter on the manifold side to prevent exhaust back flow. Oh, I also reckon that it is very beneficial to thermal coat any manifold you buy. The more heat retained in the exhaust, the more power you'll make. It also has the benefit of reducing latent heat in the engine bay

Burnt out Milltek

Cheers,

Henry

[roland2003]

There is one left at Mini2 introductory price
Regards Roland Gt Tuning

[minimc]

Quote: Originally Posted by supercoopers

For those interested, here is the link to NAM where a user there has gotten through 2 Milltek manifolds in the space of a few months. He has now junked them and gone and bought a Mini-Madness header (jet-coated as well!). The only pattern I see with this guy's problems is that the Milltek doesn't work very well in the long term with extensive mods (head/cam/throttle body etc). If you look at the Milltek port openings, they are actually as small as stock and do not extend to the gasket. I realise that you do want a little bit of a difference in diameter on the manifold side to prevent exhaust back flow. Oh, I also reckon that it is very beneficial to thermal coat any manifold you buy. The more heat retained in the exhaust, the more power you'll make. It also has the benefit of reducing latent heat in the engine bay

Burnt out Milltek

Cheers,

Henry

Good on you for posting the link Henry!

It'd probably also be prudent to note that this MINI sees significant track time.

The cat failures are most probably related to the tracking & associated loads, temps, and extended durations of. Possibly over-rich a/f - copious qty's. of unspent fuel rapidly flashing-over in cat.

[NearlyNN]

Quote: Originally Posted by minimc

Good on you for posting the link Henry!

It'd probably also be prudent to note that this MINI sees significant track time.

The cat failures are most probably related to the tracking & associated loads, temps, and extended durations of. Possibly over-rich a/f - copious qty's. of unspent fuel rapidly flashing-over in cat.

Hi all. It's my car and true it does see a lot of track time. Worth considering. Wish I had exhaust gas temp readings sure would have helped with causation. I would guess they are pretty high, what with the head, cam, manifold and throttle body work I have had done. Other Minis may not experience the same temps.

I've tested my A/F and running about 11.5, which is good. Track sessions are usually no more than 25 minutes tops. Some tracks I will run farther up the rev band. Now as to loads you may have struck on the real cause of the problem, my 225 pounds of lard butt.

I know you also mean track loads. My home course, Pacific, does have some altitude change, but the other local tracks are pretty flat.

Minimc, what I'm really curious about is whether the damage to the cat was gradual or happened in one fell swoop. No way to know now. Would be interesting if one could inspect one after 3 - 5 trackdays. However, that's darn near impossible. Just curious though.

[obehave]

Quote: Originally Posted by NearlyNN

Hi all. It's my car and true it does see a lot of track time. Worth considering. Wish I had exhaust gas temp readings sure would have helped with causation. I would guess they are pretty high, what with the head, cam, manifold and throttle body work I have had done. Other Minis may not experience the same temps.

I've tested my A/F and running about 11.5, which is good. Track sessions are usually no more than 25 minutes tops. Some tracks I will run farther up the rev band. Now as to loads you may have struck on the real cause of the problem, my 225 pounds of lard butt.

I know you also mean track loads. My home course, Pacific, does have some altitude change, but the other local tracks are pretty flat.

Minimc, what I'm really curious about is whether the damage to the cat was gradual or happened in one fell swoop. No way to know now. Would be interesting if one could inspect one after 3 - 5 trackdays. However, that's darn near impossible. Just curious though.

Wouldn't be hard if you had that removable cat section hint hint wink wink

[Tonyt3]

OK, interested in your product Roland....

Can you answer (and I suppose an educated guess will do if you haven't actually tested...)

What power increase will I see on a 210 JCW car?

Will you header be suitable to use with the JCW cat back syustem?

Cheers
Tony

[minimc]

Quote: Originally Posted by NearlyNN

Hi all. It's my car and true it does see a lot of track time. Worth considering. Wish I had exhaust gas temp readings sure would have helped with causation. I would guess they are pretty high, what with the head, cam, manifold and throttle body work I have had done. Other Minis may not experience the same temps.

I've tested my A/F and running about 11.5, which is good. Track sessions are usually no more than 25 minutes tops. Some tracks I will run farther up the rev band. Now as to loads you may have struck on the real cause of the problem, my 225 pounds of lard butt.

I know you also mean track loads. My home course, Pacific, does have some altitude change, but the other local tracks are pretty flat.

Minimc, what I'm really curious about is whether the damage to the cat was gradual or happened in one fell swoop. No way to know now. Would be interesting if one could inspect one after 3 - 5 trackdays. However, that's darn near impossible. Just curious though.

11.5-1 is pretty good. But I know a few folks who're trying for leaner - 12.0-12.8. This is aggressive, and dependant on head work and or fuel. Did you talk with the folks that did your head work, what are they saying? You might be able to go a little more lean without too much worry.

I have killed a few cats (not in MINI's) off-roading modded Suzuki Samurai. Going through muddy stuff we probably had no business trying to get through. Load was HUGE, revs were high and what I believe occurred was snowball-type effect. The temps got too hot and the cat began to clog, then the temps rose further & the cat clogged worse... etc. ...Shot a piece of ceramic cat matrix down the exhaust pipe! ...Would hate to think what might've happened had it not fragmented (one situation where a winch wouldn't have saved me). I've since switched to a different cat (which has held up). All that said, I've also wondered if the failures mightn't have been fuel-quality related.

I really don't wanna hijack Roland's thread here. ...And despite our collective good intentions that's kinda what's going on.

So, to try and get back on track...

The point here is that Roland's manifold is a nice option for those who want an aftermarket piece. I think we all can agree that the option of removable cat/test pipe is very attractive. His manifold should also flow really well in mid to high rpm, where other more restrictive designs begin to fall off.

[roland2003]

Hi Tony,I think upto 10bhp is quite possible, incidently Im now using (testing)the same injectors as you with the GTT cat/man (and many other parts) and it pulls, pulls and just doesnt stop pulling. Your car has stock BMW cat/ manifold so the GTT item will go straight on. One look at this product and you know its going to flow;- ,big ports,large diameters,minimum bend angles ,no pipe flattening,low cpsi cat etc. Pop down and have a look if like .
Best Regards Roland Gt Tuning

[Tonyt3]

Quote: Originally Posted by roland2003

Hi Tony,I think upto 10bhp is quite possible, incidently Im now using (testing)the same injectors as you with the GTT cat/man (and many other parts) and it pulls, pulls and just doesnt stop pulling. Your car has stock BMW cat/ manifold so the GTT item will go straight on. One look at this product and you know its going to flow;- ,big ports,large diameters,minimum bend angles ,no pipe flattening,low cpsi cat etc. Pop down and have a look if like .
Best Regards Roland Gt Tuning

Very tempted....

what about the JCW cat back - will it fit together nicely? I know I should get rid of it, but it suits the car....

[minimc]

Quote: Originally Posted by Tony*t3

Very tempted....

what about the JCW cat back - will it fit together nicely? I know I should get rid of it, but it suits the car....

FWIW Keep it, hang it from the rafters if you must... If and when you decide to sell the car it'll be useful. Folks who want to buy JCW may not appreciate a functional change.

[roland2003]

Tony,it will fit lovely,keep the JCW cat back. As Mimmc says keep the old one,rig it between the rafters in the garage, you can always do pullups on it when your bored.
Regards Roland Gt Tuning

[uae mini]

Roland:
will we be seeing before and after dyno runs of this header with the cat?

[roland2003]

Its going on the rollers on March 12th at the GT Tuning /Millway Rolling road day in Andover.
There are are few spaces left,only £25 to go on, or come & watch . Hopefully Go Mini will be there,
See the thread in UK events section and put your names down chaps!
Regards Roland GT Tuning.

[Tonyt3]

Quote: Originally Posted by roland2003

Its going on the rollers on March 19th at the GT Tuning /Millway Rolling road day in Andover.
There are are few spaces left,only £25 to go on, or come & watch . Hopefully Go Mini will be there,
See the thread in UK events section and put your names down chaps!
Regards Roland GT Tuning.

No disrespect meant here Roland, but I'm sure your aware that the guys on this thread will only be interested in baselined figures on standard cars - your motor has many mods I believe....

What you need is a baseline car thats run twice in short succession, one with the standard fit, then put the header on, then re-run. Its the ony way you'll get credible figures that will be accepted by the community.

If you want to, you could run it on my otherwise standard JCWS. Do a stock dyno run, then pop the header on and run the test again..... then compare the figures.

Let me know what you think.

[GRSmotorsport]

Quote: Originally Posted by roland2003

Its going on the rollers on March 19th at the GT Tuning /Millway Rolling road day in Andover.
There are are few spaces left,only £25 to go on, or come & watch . Hopefully Go Mini will be there,
See the thread in UK events section and put your names down chaps!
Regards Roland GT Tuning.

Sorry Roland, isn't the GT Tuning/Millway Rolling road on the 12th March?

[minimc]

Quote: Originally Posted by Tony*t3

No disrespect meant here Roland, but I'm sure your aware that the guys on this thread will only be interested in baselined figures on standard cars - your motor has many mods I believe....

What you need is a baseline car thats run twice in short succession, one with the standard fit, then put the header on, then re-run. Its the ony way you'll get credible figures that will be accepted by the community.

If you want to, you could run it on my otherwise standard JCWS. Do a stock dyno run, then pop the header on and run the test again..... then compare the figures.

Let me know what you think.

It would be useful to see what Roland's manifold does on a baseline car - just for the sake of comparison.

Its also fair to note that a car with breathing and exhaust mods + head work will show what the manifold is really capable of.

What'd be really interesting would be a shoot out...

Roland's manifold vs. a Miltek & Supersprint - on Roland's car.

While this test wouldn't provide baseline #'s it would give us an idea of how each manifold performs on a seriously modded MCS.

...But its probably not practical - unless you happen to have a few fellow MINI dyno'ers with said manifolds who'd be willing. If you pumped out better numbers such a test could prove very useful as a word-of-mouth sales tool.

[obehave]

Quote: Originally Posted by minimc

It would be useful to see what Roland's manifold does on a baseline car - just for the sake of comparison.

Its also fair to note that a car with breathing and exhaust mods + head work will show what the manifold is really capable of.

What'd be really interesting would be a shoot out...

Roland's manifold vs. a Miltek & Supersprint - on Roland's car.

While this test wouldn't provide baseline #'s it would give us an idea of how each manifold performs on a seriously modded MCS.

...But its probably not practical - unless you happen to have a few fellow MINI dyno'ers with said manifolds who'd be willing. If you pumped out better numbers such a test could prove very useful as a word-of-mouth sales tool.

Wonder what manifold design TOO is going to use on jlm's engine ??

[minimc]

Quote: Originally Posted by obehave

Wonder what manifold design TOO is going to use on jlm's engine ??

A comment jlm made sounded like he might be going twincharged. If that's true then we're looking at something completely different. If he's not going t/c I think a hytech custom would be very sweet. Either way jlm's gonna have one rocking rig!

So... any takers for lending Roland your manifold for the dyno event?

[roland2003]

OK guys 3 things here
1) My modified car will be getting a before & after;-the before weve had, the after on March 12th. (well spotted Graham) BTW this baseline thing will only show the increase on a std car ,you could get 2bhp
on a std car but 22bhp on a 'pullied + other bits car.' I can feel a ' Baseline isnt really the answer' thread coming on,as always I will explain why and give examples.
2) I was told yesterday that our demo car is much quicker, better handling, better stopping, AND without any promping ,'gives much more mid and low end grunt than any Mini company demo car
he's tested so far.' In fact the man said it was the most incredible CAR in 25 years journalism he had ever been in.
3) Tony, if you take your car to Milway do a run, buy the GTT manifold,if your not 100 % delighted
and /or happy with the power increase,return it within 14 days and Ill give you a full refund.
I cant say fairer than that. Better still get Ray or someone to lend you a Miltek and compare all 3. Best Regards Roland.

[uae mini]

Cool attitude Roland
I don't really care about testing it on a stock car.. since mine isn't stock..
I might be stepping on someones foot right now but seriously more boost is needed for it to really show numbers.

Tony are you up for it?

Quote: Originally Posted by roland2003

OK guys 3 things here
1) My modified car will be getting a before & after;-the before weve had, the after on March 12th. (well spotted Graham) BTW this baseline thing will only show the increase on a std car ,you could get 2bhp
on a std car but 22bhp on a 'pullied + other bits car.' I can feel a ' Baseline isnt really the answer' thread coming on,as always I will explain why and give examples.
2) I was told yesterday that our demo car is much quicker, better handling, better stopping, AND without any promping ,'gives much more mid and low end grunt than any Mini company demo car
he's tested so far.' In fact the man said it was the most incredible CAR in 25 years journalism he had ever been in.
3) Tony, if you take your car to Milway do a run, buy the GTT manifold,if your not 100 % delighted
and /or happy with the power increase,return it within 14 days and Ill give you a full refund.
I cant say fairer than that. Better still get Ray or someone to lend you a Miltek and compare all 3. Best Regards Roland.