CIS injection, again.

[cheechthechi]

Hi guys,

I'm sure most of you are aware that I'm working on building a CIS injection system that uses individual throttle bodies and will be turbo charged. I was recommended earlier to use a volvo 240 tubro airflow meter and fuel distributor, but I might have the chance to get a hold of a porshe 934? turbo airflow meter and fuel distributor. Has anyone tried using this on thier CIS setups? Will it flow enough fuel in comparison to the volvo 240 turbo one? thanks guys..

I'll start posting pictures of my progress once I get a newwer camera as my old one died on me, any suggestions for a good affordable camera too?

[Vroomer]

I anxiously await pictures of this!!

~Vroomer

[Guest Anonymous]

You probably need to just get all the different fuel distributors you can find and try them out for yourself. You've probably heard this before but quad throttles is a waste of time and money on a turbo engine, especially if you're going through a single airflow meter first. Just use one big throttle and you'll get the same if not better performance for much less work. If its just the 'cool factor' you're after, thats lost too IMO when you have to pipe the multi throttles into a single intake pipe from the turbo.

[Harv]

The Volvo one is a six cylinder head that has two not drilled and is set up for 4cylinder set up. This gives you all the possible flow and the right metering for a 2.1 vs 3.0 or whatever the Turbo Porsche was. I would just assume the Volvo setup would be less work.

If you have the ITB's, why not a Megasquirt EFI?

http://www.msefi.com/index.php

John

[gracer]

The thing to think about is the CFM that the distributer was designed to supply per cylinder. How many CC's per cylinder and at what boost level. G

[cheechthechi]

Thanks guys for the feedback. In reponse to some earlier questions, I was originally planning to go megasquirt efi, but I got tired of looking for 318i parts around here. Also, my mainly goal is to get around 200 hp, which I hear is very attainable using the cis system. I plan on using megasquirt later on for spark contol, but thats a little while after afterwards. As for the the question about why I'm using itb's is for the reponse, I'm under the impression that you get a more precise distribution of air with the itbs. as far as the turbo goes, there will be one main pie connected fron the top of the air flow meter (where the air comes into be measured) that will be conected to a filter at the end and shielded off (like a cold air intake). Onto this pipe is where the tubo line will connect to (after is runs through the intercooler). From there the air flow sensor can meter the air and will send it out through another pipe an airbox onto which the itbs will be connected onto (as what is done on regular turbo cars with air mass sensor). from the airbox the itbs each can suck in the same proportional amount of air. I figure by putting an airbox, it would be the same effect as the itbs on the e30 m3, where they are connected to an air box and get air borught in from a single line.

There is alos that "unique" factor that goes to using CIS. It is true that Megasquirt is porbably a better option but I'm sure its possible to get CIS to work in such a fashion. Thanks for your imput its been alot of help to me. I'm sorry if I seem ignorant on the subject, I'm 17 and still trying to figure all these things out.. the 2002 had been a real great learning process for me.

Thanks guys.

[2002maniac]

ugh. cis is TORTURE. Good luck!

[cheechthechi]

Reallly? What are some common problems you've had with it?