New M30 TB mod ?

[535ise]

I was going to fit some M5 TB's to my M30 but i think they are over sized for my engine, over complicated and more likely to leak air if i ever turbo charge my car.

A mod i have seen on an M30 turbo relocates the standard TB to the other side of the inlet manifold so running the intake/charge pipe work is easier, this also has the benefit in N/A guise of placing the air filter and intake pipes on the cold side of the engine away from the exhaust manifold.

The flat side of the inlet manifold is roughly 95mm x 200mm so i can fit a fairly big TB to it once it has been skimmed flat. The stock TB is 64-65mm. I had a look on the US ebay site for a bigger TB(UK ebay was useless) and there was a wacking big 90mm TB but it probobly would have been to wide.

But this one should do the trick mounted virtically(sp?) with the throttle mech' on top and the TPS on the bottom. Not sure yet weather i'm going to bolt it on or have it welded on ?

http://img519.imageshack.us/img519/7987/e814fl.jpg

Each TB is 60mm, to compare the sizes of the TB's i have worked out the total surface area in mm2 of the following TB set ups.

M30 = 3318
2 x 60mm = 5654
M5 TB's = 9542 (or nearly three times bigger than the stock M30 TB !)

Unfortunately people on the stock AFM/ECU set up won't be able to do this mod unless you swap over to either a big MAF and Unichip or a stand alone ECU like megasquirt/Emerald/ETC.

This mod will hope fully compliment my existing mods(head/cam/Emerald/larger injectors) and if i ever turbo the old M30 it will be handy to have the TB located on that side of the manifold.

Sorry for rambling on but i thought it might interest some M30 modders, what do you think ?

Andy

[535ise]

Has no one got an opion on this subject ?

[kyleN20]

i have a m30 but i never thought about doing this, sounds cool. let me know if you do it, and further more, i love your car,, i wasent even aware they made a e30 touring, it looks sick, ultimate sleeper right there. i love the car my friend.

[535ise]

i have a m30 but i never thought about doing this, sounds cool. let me know if you do it, and further more, i love your car,, i wasent even aware they made a e30 touring, it looks sick, ultimate sleeper right there. i love the car my friend.


Cheers Kyle, the US didn't get the tourings which is a shame.

I must get around to change my sig pic as that was ages ago before the M30 swap and the lowered suspension.

http://img306.imageshack.us/img306/3868/058r0rv.jpg

[kyleN20]

wow, pretty sweet, i have a few e30 parts if you need, namely i was thinking about some rear proformance struts. i took them off a parts car we got so we could have the head, they were just put in before the car was smashed into a tree, tokicko (spelling??) gas adjustables. anyways, car looks great, would be interested in any TB mods you do. i noticed on your sight that you posted a pics of like m5 TB, or intakes or somthing, did you do anything with that?

later

kyle

[535ise]

I've still got the M5 TB's but i have decided to use the twin 60mm TB as it's simpler.

[BigKriss]

G'day mate. I love the idea of recolating the throttle body on the other side. This is what Beetos does on his turbo setup using the stock intake manifold. He's using a 4 butterfly setup though. Maybe he could chime in here. I guess the intercooler to thottle body piping is a lot simpler and shorter when having it on the "other side". How much are these throttle bodies and where from?

[pundit]

G'day mate. I love the idea of recolating the throttle body on the other side. This is what Beetos does on his turbo setup using the stock intake manifold. He's using a 4 butterfly setup though. Maybe he could chime in here. I guess the intercooler to thottle body piping is a lot simpler and shorter when having it on the "other side". How much are these throttle bodies and where from?
You mean like this...


http://snap23.photobox.co.uk/295735094e6b853b0e66eb6de6dd9302b5082859eaa261a0c2 c3463f.jpg

http://snap20.photobox.co.uk/73925770bb6f1d56408e23128dd9bbacd972757f50a59601b7 a95bab.jpg

...Alpina B10 Bi-Turbo! ;)

"...The Alpina system was totally different however. Rather than having a large and obvious charge pipe running across the top of the engine, Alpina repositioned the throttle body on the other side of the inlet manifold and ran the charge pipe down by the radiator and out of sight..."

Excerpt taken from http://www.mcp-motorsport.co.uk/Content/Testimonials/Total_BMW_Bi_Plane.asp

[BigKriss]

exactly!

[535ise]

How much are these throttle bodies and where from?

Theres loads on the US ebay site, go for the second hand ones rather than the new BBK ones.

I paid 105 USD including postage to the UK, they can go a bit cheaper than this

http://motors.search.ebay.com/throttle-body_Parts-Accessories_W0QQcatrefZC6QQfromZR4QQsacatZ6028

I don't know any thing about US V8's but the Ford ones look a little better designed than the GM ones as the entrance to the TB's looks smoother/more aerodynamic.

You might find what you want in Auz as theres supossed to be plenty of V8's there ?

[535ise]

Kriss, nice track day vid !

Heres a wet lap of Donington Park in my old E34 535 ;)

It's a bit slow loading so you might want to right click and save as

http://homepage.ntlworld.com/a.law47/vid%201.mpg