6 Branch manifold, Hartage or BTBII

[SHAZ1]

Intrested in the above 2 manifolds and want to know what are the pros and cons of both and how they compare ie; power gains etc??
Any help would be greatly appreciated.

Thanks

[sidewaysjack]

Assuming you have a b25, The btb is said to be the best, but you do pay for it @ around £650 its expensive but there is a dyno print out on here somewhere that states around a 15bhp increase if i remember corrrectly. Havent really heard much about the hartge so i wouldnt like to say

[SHAZ1]

I have a 325i Sport in standard condition ie; no engine/performance mods.

[Bally]

don't laugh i have a 325 auto j reg with cat do the 6 branch have a hole or the the lambda or is the sensor fitted after the inlet

[abelai]

don't laugh i have a 325 auto j reg with cat do the 6 branch have a hole or the the lambda or is the sensor fitted after the inlet

Hope to god the sensor is fitted after inlet

Should be on a the down pipes in the cross over by choice.

[daimlerman]

The Hottuning six branch,a copy of the BTB2,has a mount for a lambda in the crossover section.

[SHAZ1]

has that been dyno'ed the hottuning manifold?

[daimlerman]

has that been dyno'ed the hottuning manifold?

31 May 09 at Scun thorpe.... last time my 2.7 went on the rollers with it's cast manifold on it made 178bhp...watch this space!

[SHAZ1]

so its the Hottuning, BTBII or Hartage. The BTBII i beleive is the proven one here here but expensive. So need info on the Hartage and Hottuning.

[bss325i]

It was my car that made 15bhp and over 20lbft torque using a just a btb2 on my standard low mileage sport.

Here is the graph. It compares before and after power and tourque.



The Hottuning one has been dynoed and only made 1bhp, yes 1bhp that is not a typo, and some tourque but not much.

The Hartge one is a 20 year old design so dont hope for great results from it.

There are plenty of threads on here about the BTB2/Hottuning debate, just do a search.

Oh and for the record the BTB2 also comes with a a hole for a lambda sensor and also comes with the blanking plug if no lamba is used. The hottuning one doesn't come with the blanking plug.

There are only two six branches worth having for an M20 and thats the BTB2 and the racing dynamics one.

[SHAZ1]

Hi,

Thanks for that, completely settles all arguments. So BTBII it is then any recommended locations of purchase?

Thanks

[m4xos]

hottuning = 1 bhp!!!!

wow!!! not up for it now!!!


good thread!!

[phelix]

Did the shop that supplied the manifold also do the rolling road test or are they independent from one another? No other changes on the car than the manifold?

It was my car that made 15bhp and over 20lbft torque using a just a btb2 on my standard low mileage sport.

Here is the graph. It compares before and after power and tourque.



The Hottuning one has been dynoed and only made 1bhp, yes 1bhp that is not a typo, and some tourque but not much.

The Hartge one is a 20 year old design so dont hope for great results from it.

There are plenty of threads on here about the BTB2/Hottuning debate, just do a search.

Oh and for the record the BTB2 also comes with a a hole for a lambda sensor and also comes with the blanking plug if no lamba is used. The hottuning one doesn't come with the blanking plug.

There are only two six branches worth having for an M20 and thats the BTB2 and the racing dynamics one.

[gooner1]

has that been dyno'ed the hottuning manifold?

31 May 09 at Scun thorpe.... last time my 2.7 went on the rollers with it's cast manifold on it made 178bhp...watch this space!

Waiting in eager anticipation for this one.
As soon as my later type engine management is installed, i will
be Dyno,ing mine too. 3251 early block.

[bss325i]

Did the shop that supplied the manifold also do the rolling road test or are they independent from one another? No other changes on the car than the manifold?

This print out is on the dyno of the people who supplied the manifold. I know what you thinking, they have fiddled the dyno to give high figures.

Well you can forget that theory because the same day i had the car dynoed on another dyno danamics rolling road but at a different location, surrey roling road to be precise and the figures were a couple of brake and a couple of lbft less. This is most likely down to the fact that Evolve has a bigger fan than SRR. If you look at the graphs, the curves are the same.

Asside from that, I know Sal at evolve quite well and he would not fiddle with outcome of mine or anyones car for that matter.

The only other non OEM part on my car is a scorpion exhaust and as we all know these give little or no gains over the standard BMW system of which i will be reverting back to as a scorpion is to loud for my liking.

Do you own a Hottuning manifold by any chance?

[Barx325i]

holy upgrades batman - 1bhp is shhh-ocking

I bought one of the hottuning 6 branchers back in the day, clearly LHD although the ebay ad stated RHD.

Anyway forgetting all that I sold it to a baur LHD chap locally so no problems there, but seriously 1 bhp is a bit skank.

On a different note seriously bss325i, you must wake each morning and fathom ways to slate hottuning dude - come on spill the beans, why the HATRED!!

[phelix]

No, I own no manifold at all for an E30 but I am in the market for one! Thanks for your reply by the way - apols if came across as poking you (or anyone else) in the eye - that wasn't my intent. It's just that I've seen too many air flow devices that have just been cash flow devices for their sellers.

[fuzzy]

i think the main point in a hottuning is it looks pretty and sounds a bit meatier than standard. £200 is never going to get you serious performance orientated bit of kit.

[bss325i]

phelix, no worries, no offence taken.

Barx325i, I hate them because they are cheap and nasty, like french cars are and i really hate them!

[Jhonno]

The hottuning manifold is a horrible thing.. Badly constructed, and just an attempted copy of the BTB design.. However the difference in the dyno results shows you the difference in the quality of the product.

It didn't even make 1bhp Barry.. 0.6 iirc

[Barx325i]

phelix, no worries, no offence taken.

Barx325i, I hate them because they are cheap and nasty, like french cars are and i really hate them!

harsh but fair, but I sympathise, I was well geared for my 200 quid shineyness.. but nowadays not so disappointed it never made contact with the rest of my system..

[bss325i]

The hottuning manifold is a horrible thing.. Badly constructed, and just an attempted copy of the BTB design.. However the difference in the dyno results shows you the difference in the quality of the product.

It didn't even make 1bhp Barry.. 0.6 iirc

0.6! LMFAO!

Just over half a brake, i could probably fart into the induction system and create more power!

[Barx325i]

The hottuning manifold is a horrible thing.. Badly constructed, and just an attempted copy of the BTB design.. However the difference in the dyno results shows you the difference in the quality of the product.

It didn't even make 1bhp Barry.. 0.6 iirc

0.6! LMFAO!

Just over half a brake, i could probably fart into the induction system and create more power!

or set out on a colder than usual, morning..

[gooner1]

i think the main point in a hottuning is it looks pretty and sounds a bit meatier than standard. £200 is never going to get you serious performance orientated bit of kit.

fuzzy, i would think everybody understands that.
Nothing wrong with a bit of atshetic adornment though.
1bhp gain is a poor return, IF you have bought the manifold just
for performance reasons. Lets face it, if i wanted a car for pure
performance reasons, an 86 325i cab would not have been my first choice. As much as i love it.

[Theo]

There are only two six branches worth having for an M20 and thats the BTB2 and the racing dynamics one.

Bit of a sweeping statement!

The sex branch on my chrome turd makes a very obvious difference when driving (not just the ASBO noise). I couldn't tell you who made it, but the fabrication is on a par with RD and BTB.

[Barx325i]

i think the main point in a hottuning is it looks pretty and sounds a bit meatier than standard. £200 is never going to get you serious performance orientated bit of kit.

fuzzy, i would think everybody understands that.
Nothing wrong with a bit of atshetic adornment though.
1bhp gain is a poor return, IF you have bought the manifold just
for performance reasons. Lets face it, if i wanted a car for pure
performance reasons, an 86 325i cab would not have been my first choice. As much as i love it.

lol, that is case in point.. however I do feel for the expectant performance seeker.. They did offer some stats on the site 7-10% (not exactly in line with a 1bhp increase), which have long been removed iirc

[bss325i]

There are only two six branches worth having for an M20 and thats the BTB2 and the racing dynamics one.

Bit of a sweeping statement!

The sex branch on my chrome turd makes a very obvious difference when driving (not just the ASBO noise). I couldn't tell you who made it, but the fabrication is on a par with RD and BTB.

Hmm, the mistery six branch. I forgot you had that. Any pics of it?

[Theo]

I really would like to know where it came from. The only other one I've seen was on a 325i sport with an H27 lump fitted.

Got these pics:

[gooner1]

i think the main point in a hottuning is it looks pretty and sounds a bit meatier than standard. £200 is never going to get you serious performance orientated bit of kit.

fuzzy, i would think everybody understands that.
Nothing wrong with a bit of atshetic adornment though.
1bhp gain is a poor return, IF you have bought the manifold just
for performance reasons. Lets face it, if i wanted a car for pure
performance reasons, an 86 325i cab would not have been my first choice. As much as i love it.

lol, that is case in point.. however I do feel for the expectant performance seeker.. They did offer some stats on the site 7-10% (not exactly in line with a 1bhp increase), which have long been removed iirc

Very true, however, to rely on the result of just a single Dyno
trial, maybe a bit presumptious. There could well have been
multiple reasons for the bad reading. Would like to see a few more cars , with this manifold, tested.
Malcolm (Diamlerman) is having his done in a week or so,and i hope to get down to the one HongkongFuey is organising..

[Jhonno]

Maybe they aren't relying the the results of a single dyno.. Perhaps all the other times it has lost power

[gooner1]

Maybe they aren't relying the the results of a single dyno.. Perhaps all the other times it has lost power

Maybe Jhonno,
but pretty sure the results would have found
their way onto here. One way or another.

[d6dph]

Dan, Behave! i should have given you a kick in the shins when you came round.

[gooner1]

Dan, Behave! i should have given you a kick in the shins when you came round.

Why was he unconcious Dave, you had the chloroform out again?.

[Jhonno]

Maybe they aren't relying the the results of a single dyno.. Perhaps all the other times it has lost power

Maybe Jhonno,
but pretty sure the results would have found
their way onto here. One way or another.

Yes and no depends on where and when it was done..



This is one of my favourite bits.. You lose more power the closer to the head you get an interruption in air flow.. So I love the hammered by monkeys, right by the head, dimples in the primaries to clear the nuts..

[Jhonno]

Dan, Behave! i should have given you a kick in the shins when you came round.