I'd like to see your ITB EFI set up; please.
 

I'm looking to convert my 3.2 DME to ITB fuel injection and would appreciate any pics of your system. I've seen one from TWM that has dual injectors, with one placed directly in the trumpet opening; anyone have this?

http://forums.pelicanparts.com/uploa...1234068542.jpg

That would eliminate any type of air filtration, no? NG for anything but show IMO..

Gary:

I think there's a filter system that goes over them.

jp

Very cool looking, wonder what the idea is behind dual injectors though..

Got me stumped, hopefully someone is using it. I remember seeing a Jerry Woods motor with them..

Here is how mine looks currently.....


http://forums.pelicanparts.com/uploa...1234072255.jpg

Yeah but Jeff, where is the upper rail?
;D

Jeff:

That looks great, how's the throttle response compared to the stock DME? Who makes your ITB's? What engine management are you running?

jp

Gary

I wanted it to idle and have some low end throttle response...... :)

Cheers

Did you tune it from scratch? Once set, do you need to re-tune regularly?

JP,

How does the throttle response compare to stock DME motor? There is no comparison, period. Mind you this motor is not anywhere near stock internatlly either. But response is lightning fast. Puts a smile on my face everytime i touch the throttle pedal.

I run a Microtech EFI system with their X6 ignitor box for the coils. Very easy to tune, very stable. Has lots of features I don't use. Many high dollar units out there that are wonderful, but for what I need this one fits the bill. Idles great, no stumble, no part throttle issues etc, and tuned fairly easily on the dyno. Just this week I did some temp map adjustments since we had some colder weather here...

Cheers

It came with a base program. Once the motor was in, I turned the key, and it fired right up! It ran rich initially because the base program was for stock injectors.....

I had someone familiar with the system tune it on the dyno. I have since played with the temp maps (when I encountered higher or lower ambient temps) but once that is all set, you just leave it alone.

Cheers

Are you able to program various maps for different atomospheric conditions? Does it use a wide band O2?

You can program it via TPS or MAP (vacuum) or a combintation of both. You tune idle, part throttle (cruise) and WOT seperatly. Or you can tune it via rpm/load.It has wideband capacity, I did not get it. Instead I run an LC-1 on each bank and have a digital gauge on the dash.

I was terrified of programmable efi. I nearly put carbs on the motor. But now that I am familiar with it, I love it.

If (when) I do it again, I am tempted to try a megasquirt....

Cheers

Units such as Motec are tuned the same way??

Motec, DTA, Haltech etc are all tuned essentially the same way. Check out TROG's thread recently and also DFINK's thread.

TROG put ITB's on an otherwise stock 3.2 and used a tec3. DFINK built a motor similar to mine and also uses (i think) a tec3. there is some really good info in there.

My throttle are by Jenvey. They are absolutely fabulous. Beautifully made and well thought out.

I pm'd and emailed a lot with TimT here and Bill Rudner of Rudners Racing (sp) and they provided me with a great deal of info even though I never spent a dollar with them and my company has never done any business with theirs. They are haltech experts. If you consider a haltech, call them up. They have built another incredible motor for a client of theirs and mine who posted about it here....


now I need to ask................. What type of motor are you looking to build or what are you looking to get from an ITB/EFI set up?

Cheers

At this point I was considering removing the DME and adding cams to work with the added air flow. A 3.2 should produce some nice numbers with the added flow of ITB's; not to mention the throttle response.

Heres mine fitted to a carrera 3.0 Jenveys,Omex ecu & crankfire,its off to the dyno end of the month and was fitted with PMO carbs
http://photos-f.ak.fbcdn.net/photos-...95037_2691.jpg

Here is my system. I am running Megasquirt and it will do everything that I could ever want in an EFI system. I installed TWM 3003 46mm ITBs on existing weber manifolds/linkages. Before I built the new motor (thanks to broken head studs) I had the EFI installed on a stock internal 3.0. Throttle response was fantastic. Engine drove easier than it did with the webers it replaced.

http://forums.pelicanparts.com/uploa...1228830152.jpg

Megasquirt requires that you start from the beginning with tuning. Someone could probably provide a base map to the the motor started. The rest is up to you. Yes, install a wideband O2 sensor. Its the only way to tune properly. The first time I setup the car it took several days of tuning. The new motor took about 2.5 hours. I tuned it on the street and have fantastic drivability.

Here's some cycle TB's I put on a Ferrari V8 ... don't think they're big enough for the Porsche motor though.


http://forums.pelicanparts.com/uploa...1234110122.jpg

Here a a few engine we built with EFI&ITBs

Bills 3.8, in this pic you can see the twin injector rails. We tuned this so at part throttle the engine is running one set of injectors, as soon as manifold pressure goes positive the second set of injector fire.

http://forums.pelicanparts.com/uploa...1234111806.jpg

Plenum removed, you can kind of make out two injectors per barrel.


http://forums.pelicanparts.com/uploa...1234111854.jpg

These are single injector ITBs with plenum

http://forums.pelicanparts.com/uploa...1234111911.jpg

3.7 na

http://forums.pelicanparts.com/uploa...1234111982.jpg

3.9 na


http://forums.pelicanparts.com/uploa...1234112012.jpg

We are developing a custom ITB EFI setup at the moment in Sydney for my '79 SC.

All the CAD drawings are done and we are getting all the parts machined next week.

The test car for it is my 3.0 litre '79 SC, but we have sized the throttle bodies so that they will work equally well on a 3.2.

It incorporates filtration and velocity stacks / trumpets.

My company is an AEM dealer, so we will run it with the AEM Universal Engine Management System. There is a video about the AEM Universal EMS here ...

http://www.tunersgroup.com/Videos/AEM_Universal_Engine_Management_System_EMS_Video.h tml

My motor is out of my SC at the moment as we're rebuilding the 915 transmission, so we're developing the ITB EFI setup while the engine is out of the car - much easier to do on an engine stand than in the engine bay !

I'll post some photos of the setup next week once we have the parts machined.

I originally decided to develop it for my own car, but we may offer it as a kit.

- Adam

Tim:

How is the quality of the TWM bodies?

jp

subscribing

TWM 3003 and 3006 series throttle bodies are a good quality ITBs.....You will not have any hardware problems using them

We have used them in a number of builds...

There are a number of other manufacturers on the market which look good as well...

Jenvey, PMO, Extrudabody, Hargett makes what looks like a really nice product... I want to use them (Hargett) on the next iteration of my own 2.2 screamer.

Cant remember the name now... but someone makes CF barrel valves which you an fit to a 911..Maybe Lumenition>?

Here is another good alternative.

http://forums.pelicanparts.com/uploa...1234151214.jpg

These have 46mm throttles but we have 50mm ones, too.

Steve:

Is that the same engine you discussed with me?

jp

Thats one of them,...(this one is a 3.4).

Steve, what are the pros and cons to a high butterfully/injector setup like that?

Great looking setup there Steve. Do you manufacture those throttle bodies inhouse ?

Do you have any dyno sheets comparing that high butterfly setup to a lower butterfly setup ? I'd be very interested to see the differences on the dyno graphs.

- Adam

Re. the offset dual injectors on a slide valve...i'd guess if you center a single injector over a slide valve setup you're not going to get all the fuel at part throttle.

http://forums.pelicanparts.com/uploa...1236736281.jpg

PMO ITB's, 26#/HR injectors, TECgt ECU, Tech Edge Wideband O2.

ITBs
 

This is what we had at the PRI show 08
http://forums.pelicanparts.com/uploa...1244993672.jpg

http://forums.pelicanparts.com/uploa...1244993829.jpg

we have a lot of call after the show on this set up
http://forums.pelicanparts.com/uploa...1244994026.jpg
This is not a full engine this was just made up of part at the shop for the show
Mack
emerald performance your USA Jenvey dealer

Subscribed. I had a TEC and TWM setup back in the 90's but had a hard time tuning it for street use. Things have come a long way on the EFI side.

Here's a pic of my 2.8 with TWM throttle bodies, 3.2 injectors, Haltech F10 ECU and Electromotive twin-plug ignition. Recent Mustang dyno tuning by John Holleran in Pinole (SF Bay Area) has resulted in immediate cold starting, 900rpm idle and excellent power/throttle response. Its never run better.
http://forums.pelicanparts.com/uploa...1245019563.jpg