btb2

[bss325i]

for my 2p I know what the btb2 will do whereas I dont know what the HT one will do as the test car wasn't running properly on the day

IF you read the results post of when HT was fitted, it is stated that the car is running slightly rich since the mani was fitted but NO fueling adjustments have been made.

My car's never had any fueling adjustments in its life ans the fueling never changed after fittment of the BTB.

which was what I was getting at, bss325i. The results are inconclusive without 2 graphs - one for each 'fold under the same engine conditions

There is to graphs, one is laid over the other.

[AlpineAde]

Rorty bling for £200? Yep, the Hottuning manifold is pretty hard to beat! very true

It is, isn't it? I'm still LOLLing at my "rorty bling". LOL!

[spook]

Rorty, that will make me laugh next time i fire up my car

[bss325i]

I must say that you do appear to be on a bit of crusade. And nothing wrong with that ~ but it's not my style. All power to you, though!

To be honest i think i've made my point enough so i will end my crusade!

I would still be interested to see if there is any variation in constuction of the BTB2 so any feedback from reggid would be great.

[Simon13]

they won't be 100% the same none of them are

[Jon_Bmw]

A point to make if I may:

Any 6 branch generally increases power towards the top end of the scale, right? (3000rpm+)

Ask sheps, salman, anyone with a dyno, a rich top end will KILL any chance of a car making anywhere near its best possible power on the day. It would be better if it went Lean if you were chasing numbers rather than look after your engine.

So, the question is, was the HT car running rich on its first dyno test? If so, then the results are half meaningful, if not, then they are as good as useless. Also, if they were different AFR between the runs, why? Was something else changed?

I have always said I thought the BTB2 was a thing of sex, in terms of welding, shape and design. But I probably also said that I wouldn't pay £x amount for one as its not my thing. Not that I have a leg to stand on having coughed up £540 for a LSD two days ago.


Also I couldn't give a toss which is better and which is worse

[bss325i]

they won't be 100% the same none of them are

Yes but a drastic change in design by making a provision for ease of fitment isn't exactly a slight variation.

[E30BeemerLad]

Not that I have a leg to stand on having coughed up £540 for a LSD two days ago.

Double dip?

[Simon13]

settle pettle

hot tuning is where it's at. Shiney means good right?

[bss325i]

So, the question is, was the HT car running rich on its first dyno test? If so, then the results are half meaningful, if not, then they are as good as useless. Also, if they were different AFR between the runs, why? Was something else changed?

It is stated in the results that there were no fueling adjustments made between fitting.

Also were are the AFR graphs?

[bss325i]

settle pettle

hot tuning is where it's at. Shiney means good right?

All that glitters is not gold!

[B7]

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Sorry, are we still on about this I'll go back to sleep.

[bss325i]

ZZZZZZZZZZZZZZZZzzzzzzzzzzzzzzzzzzzzzzzZZZZZZZ
ZZZZZZZZZZZZzzzzzzzzzzzzzzzzzzzzzzzzZZZZZZZZZZ
ZZZZzzzzzzzzzzzzzzzzzzzzzzzZZZZZZZZZZZZZZZZZZZZ
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Sorry, are we still on about this I'll go back to sleep.

[B7]

[Jon_Bmw]

So, the question is, was the HT car running rich on its first dyno test? If so, then the results are half meaningful, if not, then they are as good as useless. Also, if they were different AFR between the runs, why? Was something else changed?

It is stated in the results that there were no fueling adjustments made between fitting.

Also were are the AFR graphs?

I have no idea. Some one said in this thread that the HT car when dynoed was running rich. Without the AFR either on screen or printed out afterwards you would not know. Our 205 was dynoed and we thought it smelt a bit rich and it turned out a bit lean!

[pacerpete]

Jeez Barry, haven't you got a staffire body kit that needs zymoling or some escort 'tennis' brochures that need rearranging ?

[fuzzy]

didnt simon say in his thread that his car was running rich after fitting the HTM according to the dyno tester?

[B7]

ooooooooooooooooooh 'e's like a dog with a bone when it comes to BTB's

[bss325i]

didnt simon say in his thread that his car was running rich after fitting the HTM according to the dyno tester?

Yes.

Sorry about the delay in getting the 2nd dyno run done!

Finally got it done this morning, big thanks to Paul (sheps) for the dyno runs/time.

Manifold was fitted to my 325i touring, before fitting, only mods were a full sebring exhaust system, zone chip and an induction kit.

Obviously a good strong engine to start with, engine came from an auto with just over 100k on the clock.

Red line shows pre hottuning, purple with hottuning.

No adjustments were made to the fuelling, Paul pointed out that the car is running rich at some points since fitting the manifold, and obviously a remap would sort this out.

All in all, it's shown an improvement, good increase in torque, and it looks much nicer in the engine bay than the cast manifold.

[E30BeemerLad]

seems all relative to me Barry, the hottuning one makes a third of the gains of the BTB, but costs a third of the price

[Jon_Bmw]

"No adjustments were made to the fuelling, Paul pointed out that the car is running rich at some points since fitting the manifold, and obviously a remap would sort this out"

[fuzzy]

how come theres 7 degrees difference in ambient temp between the 2 runs with the colder run making most power? is that enough to make a difference?

[bss325i]

how come theres 7 degrees difference in ambient temp between the 2 runs with the colder run making most power? is that enough to make a difference?

Notice how the post fitment "more powerfull" run is colder.

[bss325i]

"No adjustments were made to the fuelling, Paul pointed out that the car is running rich at some points since fitting the manifold, and obviously a remap would sort this out"

No remap done on mine!

No change in AFR on mine after fitment!

[E30BeemerLad]

although I do belatedly notice a massive difference in the ambient air temp (much lower) when the HT one was tested

[bss325i]

We all know the colder it is the more dense air is thus.......


need i go on?

[e30bmlover]

what an epic thread iv started! anyway if anyone has a good manifold for sale.... let me know!

[Jon_Bmw]

But I think, IIRC, and you work it out logically:

If you are to put that its got hotter as the engine bay heats the room up, the correction factor actually gets bigger, so it would show more power. By imputting a colder value the corrected flywheel BHP is actually less.

The runs were done on different days anyway, again IIRC.

[fuzzy]

i wont pretend i know the ins and outs of rolling roads but is 7.5 degrees ambient temp enough to account for the 2bhp power increase rather than the manifold?

[oakey]

Perhaps after a remap the ht fannymould could release a decent amount of power?
Very impressive that the btb made 10bhp without any changes to fuelling, I wonder how much more would be released with a remap. Could it push it near 200bhp??

If the fuelling was out on the HT dyno run then surely it's an unfair test????

[bss325i]

My car before,





and after.





Make of that what you will but one thing i will point out is that on the run with the manifold, the ambient temp is higher by 9 degrees!

The intake temps are 1 degree difference between the two!

[bss325i]

Perhaps after a remap the ht fannymould could release a decent amount of power?
Very impressive that the btb made 10bhp without any changes to fuelling, I wonder how much more would be released with a remap. Could it push it near 200bhp??

If the fuelling was out on the HT dyno run then surely it's an unfair test????

But why was it out? As they have stated NO adjustments had been made.

[daimlerman]

Of course if I was to get my car dyno'd again and it made a 15% gain over last time,Barry would just rubbish the figures because my cheap manifold was proved to be better than his and my cock is bigger...

[Jon_Bmw]

So the correction factor is larger and will show more 'corrected' flywheel power as the ambient temperature is higher.

Assuming the correction forumula are correct and the temperatures entered are right all of this is imaterial anyway.

[bss325i]

Of course if I was to get my car dyno'd again and it made a 15% gain over last time,Barry would just rubbish the figures because my cheap manifold was proved to be better than his and my c**k is bigger...

Dont get so bitter about it Malcolm.

I'm just defending my chosen product when everyone including youself sang the praises of the HT without any proof and derrided the so called rip off price of the BTB.

Hurry up and get you car dyno'ed to prove me wrong!