M20 64mm BBTB (+4mm = 15%), improvements see page 1 post 1

[N00b]

Muli is sourcing a TB, so soon, will be in touch

1. Muli
2. Sweep
3. N00b?
4. Kemlo?

Did you manage to get upto 65mm, or is 64 as far as you're comfortable to go?

Bumpity bump?

[e301988325i]

1. Muli
2. Sweep - Ready
3. N00b?
4. Kemlo - Ready
5. Westie84
6. Scott180gtb - Ready

Hi guys been a bit busy getting a new fixture made.

Noob there's not a lot of point going out beyond 64mm unless you are going to enlarge the inlet manifold entry. I am going to try a big one, but havn't done it yet. if it's successfull then I will be charging cosiderably more for them as it's a lot more work and hassle.

Cheers Alex

Ps) Kemlo, Scott180gtb and Sweep have PM

Edit:

Once I've received your TB, I'll PM to let you know I have it. When finished I'll get touch to arrange payment and returning it to you.

Edit 11/3/10

i) Collected the material for the new butterflies today.

ii) The bodies will now be radiused at the front, I've made a fixture and now have full CNC control of the form.

iii) westie84 has PM.

[k13]

so just to clearify this...

what are the gains/advantages from it, any bhp increased?

direct fit ??

any tuning needed to my afm ??

will it fit on my 325i se 1988 f reg manual ??

thanks.

[Dave_M3]

By just fitting it, you'll gain more responsiveness.
A slight drop in low-end torque alright but the M20 has enough low end anyway to sacrifice.


The BBTB wasn't worth the original prices like 200 quid they once used sell on an exhange basis but for 60 quid, its a bargain.

Other mods like a chip, BTB, manifold, maybe cams already mentioned previously in the thread and 2.7 or 2.8 conversions will really make the BBTB show an improvement.

[e301988325i]

Two bodies are in pieces ready for machining tommorrow morning, CNC program done and tested on graphics.

I've found some razor sharp cutting inserts, so I'm hoping I may be able to achieve a bright surface finish.

IF all goes to plan then these two bodies should be finished by the end of the week.

[e301988325i]

There is no way to go above 64mm. My spare TB written off, I'll post pics at the weekend.

1. Muli
2. Sweep - received TB
3. N00b
4. Kemlo - received TB - have PM
5. Westie84
6. Scott180gtb - Paid, ready to be post

[FMH]

i'm interested. i've also, just read the link about porting the inlet manifold holes. is this something you can do?

[nuttyp]

Defo interested if your doing some more, need to source a throttle body mind. Hunt on!

[e301988325i]

i'm interested. i've also, just read the link about porting the inlet manifold holes. is this something you can do?

A very specialist job, porting IMO, even more so as the stock manifold is VERY good.

1. Muli
2. Sweep - received TB
3. N00b
4. Kemlo - received TB
5. Westie84 - received TB
6. Scott180gtb - Paid, ready to be post

[sweep]

Are these ready?

[e301988325i]

Defo interested if your doing some more, need to source a throttle body mind. Hunt on!

This is still ongoing although, I won't be accepting any more TB's until Mid June, due to holiday booked.

[e301988325i]

Are these ready?

Guys, I've done the butterflies, but not the bodies, I've got half finished jobs on both my machines, so when they're finished I should be able to do the TB's.

[tomislav]

I'd be up for this when you do your next bacth in June mate.

You still on for that?

[e301988325i]

I'd be up for this when you do your next bacth in June mate.

You still on for that?

All being well this will be an ongoing thing

[mhuk]

Please PM me in June regarding this.

[DmcL]

id definately fancy one of these but i havent got a spare at present. if tomson still has some what sort of price would we be talking for the 4 star service with buying one from him and him sending it up to u? lol

would be cool if i managed to get it in the motor by the 5th of june. have a RR run booked and im wanting to get as much done to the car as possible beforehand.

also is 64mm the maximum or can it safely be taken out to 65, 65.5, etc? id like to go as big as possible, even if its only an extra 0.5 over 64.

[miniblob]

I've got a couple of spare TB's to get rid of!! Thought they were big bore, but it would appear they are standard!!
See this thread Clicky

After £25 each (including postage) by paypal and i'll get it posted out asap!!!

TB1 has the little brass pipe (which looks like it has been blocked off with a bit of tube and a bolt!!):


TB2 looks different on the bottom and doesn't have the brass pipe at all:


Drop me a pm if you want one and i'll send you my paypal address!!

[jbh]

hmm give me a pm about these when your doing the next batch.. should have a few TB's lying around if any one else is wanting one.

[e301988325i]

1. Sweep - all finished
2. Kemlo - all finished
3. Westie84 - all finished
4. Scott180gtb - all finished

Zone donation made for above BBTB's

Hello mate bbtb is excellent, throttle responce is so much sharper it works well.
Thanks again
Dave.

[Taylor325i]

1. Muli
2. Sweep - received TB
3. N00b
4. Kemlo - received TB
5. Westie84 - received TB
6. Scott180gtb - Paid, ready to be post
7. Taylor325i



PM sent

[e301988325i]

7. FMH
8. nuttyp
9. tomislav
10. mhuk
11. DmcL
12. jbh
13. Taylor325i
14. Bumpygt

Who's still interested in a BBTB for a batch at the end of July?

[morerevsm3]

I am interested, but my spare TB has a TPS with a round plug, I need flat plug, so will need to find another

[DmcL]

7. FMH
8. nuttyp
9. tomislav
10. mhuk
11. DmcL
12. jbh
13. Taylor325i
14. Bumpygt

Who's still interested in a BBTB for a batch at the end of July?

im definately still in. just last week i picked up a suitable spare TB. so all i need to do now is collect the pennies for your services

is there a date by which u want to have all of the TB's with u?

additionally i have a black & decker wizard (similar to a dremel) and was thinking of smoothing/rounding the edges of the entry ports from the vacuum and ICV fittings behind the TB butterfly. additionally i will be polishing the full length of the inside of the TB once i get it back from u. dunno if there will be any noticable benefits on rounding off the edges of those wee ports but it couldnt hurt at any rate..

on a side note im also experimenting with a spare airflow meter i have. rounding off sharp edges and trying to generally smooth the path thru the meter with the wizzard and some grinding stones for it and hand sanding/polishing. also thinking about filling the hole in the top for the air temp sensor and relocating it. not sure how that will turn out tho.. could do well or could cause the car to run like a bag of spanners

[e301988325i]

7. FMH
8. nuttyp
9. tomislav
10. mhuk
11. DmcL
12. jbh
13. Taylor325i
14. Bumpygt
15. badassyas

Who's still interested in a BBTB for a batch at the end of July

[DmcL]

im still in.. let me know when u need it by so i can save up the wonga and get it sent over to u.

ive started to clean/polish bits of it out of boredom haha

[Taylor325i]

I'm still in


Taylor.

[m_jermyn]

Hi I am really interested in this but I live in Australia is there anyway I can get one of these?

Mike

[Simon13]

I've got about 5-6 spare 2.5 TB's kicking about if its of help for this cause? Mike i can put one in for you if it helps

[m_jermyn]

Simon that would be good mate, I have sent him a pm a few days ago but have yet to get a reply..

Cheers mate much appreciated

[driftmonkey]

Anymore of these on the cards?

[e301988325i]

Ok guys I'm ready to start collecting your TB's,

As of 13.7.10
1. m_jermyn
2. Taylor325i
3. DmcL
4. badassyas

Have PM

PM me guys if you want to get in on this batch and I'll give you my address.

[Simon13]

i'll be posting mikes i think at the weekend coming

[Taylor325i]

Ok guys I'm ready to start collecting your TB's,

As of 13.7.10
1. m_jermyn
2. Taylor325i
3. DmcL
4. badassyas

Have PM

PM me guys if you want to get in on this batch and I'll give you my address.

PM Replied.

Cheers!

Taylor.

[e301988325i]

20/7/10

4 bodies received, I've got one TB with no details, please PM me with a description to prove it's yours so I know who/where to return it to!

1. Taylor325i - received
2. DmcL - received
3. badassyas - received
4. ? - received

My PM inbox was full when I logged on, if you sent me a message and you were wanting a reply and you haven't got one then please contact me again.

mhuk + tomislav + nuttyp + shakeele30 + driftmonkey + 3 above have PM

[m_jermyn]

Im betting it my throttle body.... I have contacted the person who sent it on my behalf for a description...

Mike