No Hotrod Valves for M30...

[535ise]

Which M5 TB's, E28 or E34 ? Diameter of the throttles ? Which type of ECU and cam are you using ?

How are you mounting them to the head ?

I started a similar project with some E28 M5 TB's on my M30 but gave up on it inplace for some thing simpler(see pic below), a friend who is more dedicated to seeing the project done had them off me for his E30 335 turbo.

He ended up having to chop one of the pipe stubs from the 'stat housing and use an angled/bent bit of tubing from another car to clear the TB's. You should be OK on the E34 chasis but he had to move the brake servo over, use a smaller servo and had to cut/weld a bit of the plenum to fit. Plus some other stuff needed doing to get them to work, a PITA in other words.

Good luck with the project, i hope it goes well for you.

(still not fitted properly yet, twin 60mm TB)

[Robin-535im]

Which M5 TB's, E28 or E34 ? Diameter of the throttles ? Which type of ECU and cam are you using ?

How are you mounting them to the head ?

...a friend who is more dedicated to seeing the project done had them off me for his E30 335 turbo.

... a PITA in other words.

Good luck with the project, i hope it goes well for you.
...

Right now I'm still in the planning stage so I may decide it's indeed too much work, but I've got some e34 M5 (S38B36) throttle bodies on the way from Germany, (assuming the seller keeps up his end of the bargain.) I'll use the same ECU and some sort of alternative to the AFM, like a MAP or MAF. Idle control should be pretty much the same, as should TPS. Clearing them in there and mounting it up is where the costs come in, and my plan is to saw off the last inch of the stock manifold, saw off the last inch of the TB's, and weld them together. That way I keep the bolt pattern and injector geometry to match the head. Now will that really work? I have to get the parts in hand to really see.

I've seen the thread on the e30 board, that is an impressive setup. Hopefully the air box won't need a hunk cut out for the e34!

The head I'm still building up, and I plan to get a Schrick 284 cam from VAC and keep it otherwise stock. It's been CNC ported by Bavarian Engine Exchange and it looks pretty well done, but I am by no means an expert. I may totally screw up the whole engine and have less power than stock but it's worth a shot just for the gleaming TB's under the hood. The headers have the same plan, I've got s38B36 headers and will lop off the last inch and weld on a flange that matches the M30 head, then fab a piece to make the bottom bolt on to the rest of the exhaust.

The MAF/MAP should allow me to get the mixture right, and if I want to play with timing that's another $500 or so for a programmable ECU... I'll wait on that until the beast proves it can make it down the block!

[535ise]

I'll use the same ECU and some sort of alternative to the AFM, like a MAP or MAF. Idle control should be pretty much the same, as should TPS.

Yeah, i think you need to lose the stock AFM if possible, some thing(ECU) that allows you to tweak the fueling would be good ?

Clearing them in there and mounting it up is where the costs come in, and my plan is to saw off the last inch of the stock manifold, saw off the last inch of the TB's, and weld them together. That way I keep the bolt pattern and injector geometry to match the head. Now will that really work? I have to get the parts in hand to really see.

Given the chance again i'd be cutting/welding the mounting flanges rather than mess about with an adapter plate. I'd cut the M30 manifolds just upstream from the injector boss's.

I've seen the thread on the e30 board, that is an impressive setup. Hopefully the air box won't need a hunk cut out for the e34!

Yeah, you should have more room to play with, i've not been in my freinds 335T since the TB's went on but he is happy with them, it was a very rapid before the TB's(330RWHP), he is maxing out his 30lb injectors on a fairly low boost level once he gets that sorted the boost is going higher i think.

The head I'm still building up, and I plan to get a Schrick 284 cam from VAC and keep it otherwise stock. It's been CNC ported by Bavarian Engine Exchange and it looks pretty well done, but I am by no means an expert. I may totally screw up the whole engine and have less power than stock but it's worth a shot just for the gleaming TB's under the hood. The headers have the same plan, I've got s38B36 headers and will lop off the last inch and weld on a flange that matches the M30 head, then fab a piece to make the bottom bolt on to the rest of the exhaust.

Sounds a nice set up you are aiming for, i'd like some headers my self but RHD isn't too helpful, i bought some 'pina B10 headers because they were cheap but there was no way they were going to fit with out buchering them.

I've got my head ported and a 284 schrick but i don't feel that it pulls hard enough over 5.7k rpm so my hope is the twin TB will help flow more air to help this ? I know the M30 is no rev monster but i'm hoping it will make peak power around 6.2k rpm ?

The MAF/MAP should allow me to get the mixture right, and if I want to play with timing that's another $500 or so for a programmable ECU... I'll wait on that until the beast proves it can make it down the block!

Some thing like MS is the way forward modded engines/owners that like to tweak and/or keep modding. Once my TB is on my Emerald ECU is going to get remapped.