what ITB setups have people used on an M20?

[oakey]

i want to run individual throttle bodies but i cannot find any "kits" and i'm not really sure what exactly to look for or whatever else i need to make it all work?
i know i'll need:
a standalone management system,
intake manifold(where can i get one of these? will it have to be custom?),
injectors
will i need a new fuel rail etc? different fuel pump?
any advice greatly appreciated.
dave

[maxfield]

diblas i can't remember how to spell have a look at player6s car.

[maxfield]

Dbilas

[Turbo-Brown]

I'm right in the middle of making a set of custom ITBs for a guy with a great big V8, and the M20 is next on my list if you're interested and can wait a few weeks for me to start on them

[oakey]

I'm right in the middle of making a set of custom ITBs for a guy with a great big V8, and the M20 is next on my list if you're interested and can wait a few weeks for me to start on them

thats exactly what i wanted to hear! i'm in no rush for them matey.
ive just got a old merc as a runaround for a few months so i do up the e30.
engine and bodywork.
can you run itb's with a turbo set up on an m20 without too much hassle?
i cant yet decide whrther to go forced induced or stay n/a
i will gladly take you up on youre offer Brown.
any idea of price?

[Turbo-Brown]

I'm running a set of ITBs on my current setup and they work absolutely brilliantly Throttle response is amasing and the hp/psi is also pretty decent

The V8 set I'm doing run to £1300 odd so pro-rata it'd come out at £975, but the linkage is quite complex on the V8 as both banks need syncronising so the price should come down a bit taking that into consideration and also some of the bits I sub out are more numerous on the 6 cyl than an 8 which helps reduce costs

[stuartgallafant]

alex, i've been told that ITB's on forced induction setup is a bit of a wasted effort. do you really think it makes that much difference then mate?

[Turbo-Brown]

It seems there are two schools of thought on the matter, one that it's a waste of time, the other that making everything flow as efficiently as possible will lead to more power / psi of boost.

Certainly I subscribe to the latter way of thinking, as did Bugatti (before VW stuck their oar in) on the EB110, Nissan on the Pulsar and Skyline, Peugeot on the 205 T16 rally car and probably a fair few others

[stuartgallafant]

cool cool, thats a very good point mate. i wasnt snatching, it was just something i got told!

only reason i asked, is because i'll be building my ITB's up soon, and if im ever going to supercharge the engine, i wanted to keep them on there!!

[gcorky]

alex, i've been told that ITB's on forced induction setup is a bit of a wasted effort. do you really think it makes that much difference then mate?

well firstly off boost performance would be greatly improved.
and i believe it does too on boost, but is not as important as it is on na.

more air in=more air out=more power

[Turbo-Brown]

sorry dude, didn't mean to sound so defensive

The only problem you'd have with (a positive displacement) supercharger setup would be venting the boost generated at idle, but it's nothing Lentec hasn't worked around with his down-stream throttle body so I'd say go for it

[stuartgallafant]

why vent the boost at idle? cant you just run the charger at idle so its right near making boost, without actually boosting?

[gcorky]

when boosting though with itbs you do then require a more complex intake upto itbs...rather than say a 3 inch pipe upto tb.not a mass problem but something to think about on your initial design.

[stuartgallafant]

when boosting though with itbs you do then require a more complex intake upto itbs...rather than say a 3 inch pipe upto tb.not a mass problem but something to think about on your initial design.

yeah, i had thought about this problem! gonna be a ball ache i reckon!!

[oakey]

I'm running a set of ITBs on my current setup and they work absolutely brilliantly Throttle response is amasing and the hp/psi is also pretty decent

The V8 set I'm doing run to £1300 odd so pro-rata it'd come out at £975, but the linkage is quite complex on the V8 as both banks need syncronising so the price should come down a bit taking that into consideration and also some of the bits I sub out are more numerous on the 6 cyl than an 8 which helps reduce costs

price sounds reasonable dude
can you sort out manifold injectors etc? or is that included?

[Turbo-Brown]

It's only really a problem with positive displacement chargers which are always trying to supply X amount more air than the engine can consume. With the throttles shut, the air's got nowhere to go so the system pumps up and up until something bursts or the drive belt to the charger starts slipping or breaks.

It's no big deal though as you can incorporate a couple of dump valves into your air box which are pulled open by engine vacuum when the throttles are shut in the conventional way

Think Len has a magnetic clutch on his charger which disengages drive when the throttle's shut too which helps relieve stress on things too.

[Turbo-Brown]

price sounds reasonable dude
can you sort out manifold injectors etc? or is that included?

That price includes manifolds, throttles, throttle linkage and bracketry to retain the original fuel rail and also the crank case breather pipe.

You'd need to supply your own injectors and, whilst I can supply an air box, people like to be able to play with their tuned lengths so the throttles I make accept standard Weber pattern trumpets.

The design I've come up with allows you to put the air box on top of the engine so that you can keep the runners pretty much the same length as the original plenum intake, or it can be moved closer to the head if your setup dictates

[stuartgallafant]

alex, did tee/tristan show you the ITB's we have? could you make up a manifold for them to go on my M42? i can send pics

[gcorky]

Alex,you have it all worked out...lol,how do you find the time?

[oakey]

sounds awesome mate. let me know when youre able to get going on them

[gcorky]

speak of the devil..http://www.e30zone.net/modules.php?name ... ic&t=61227

m42 though.

[Turbo-Brown]

alex, did tee/tristan show you the ITB's we have? could you make up a manifold for them to go on my M42? i can send pics

Can certainly take a look dude, I've gotta give the V8 chap top priority until his project's complete though, will pop some piccies of his setup up when I've got something to show for my efforts

Alex,you have it all worked out...lol,how do you find the time?

It's amasing how much free time being single gives you

sounds awesome mate. let me know when youre able to get going on them

Will do dude

[oakey]

ive just noticed youre in aldershot turbo brown (squaddy terriory!). not far from me. my g/friend goes uni in farnham

[jkarran]

Bike bodies are good value, there's an endless supply of donors! Cheaper than bespoke but nowhere near as cool.

jk

[Turbo-Brown]

Small world! I'm just down the road in Ash, but people have heard of Aldershot

Whereabouts are you Oakey?

[stuartgallafant]

i know aldershot. down the A3 somewhere if i remember right. is it near new malden?

my dad used to be a driver for Cranleigh Freight Services and i used to go to work with him sometimes, you know, 'when i were a lad' type thing!!

[oakey]

well i'm not actually that close. i live in chessington/leatherhead but i spend alot of time in farnham so it is sort of close to me. i go to the Burger king in aldershot at least once a week.
stuart- its not really near new malden, NMalden is S.london end of the a3 whereas aldershot is closer to guilford.

[95-540iLE]

Any update on this? I am very interested.

[Turbo-Brown]

We're working on the specifics for Oakey's setup as his ports are larger than standard.

[oakey]

Any update on this? I am very interested.

I'll keep updating the thread as and when things happen dude. hopefully it will all be getting started soon. I need to get a standalone management system fitted first.

Oh yeah! Turbo-Brown. Would it be ok for you to post me a printed version of the flange? as I'm not sure whether, if you email me the file, the dimensions will be correct
cheers matey
If you can get it to me asap that would be awesome as ive got alot of free time this week/weekend

[Turbo-Brown]

Coolio Dave, will print one off tonight

[e21Jason]

Hi

Selling my set up

http://www.e30zone.co.uk/modules.php?na ... ic&t=67164

Jason