I am thinking of ITBs looking for advise

[chrisbalich]

OP,
I have a kit from Al using Triumph ITBs and MS3X.
Al supplied the hardware, ECU, unterminated wiring harnesses, and a base calibration.
I supplied/bought/built the balance of the parts and wired the whole thing up. It's not the most challenging thing in the world, but you have to be methodical and patient.
Then you get it running...likely not very well. At this point, it is mission critical to be methodical and patient (there's a theme here) while you sort out your calibration. (tune)

There are myriad ways to convert to EFI. You don't even have to run ITBs to convert to EFI. A single TB common plenum intake would take out a lot of complication. You can keep your dizzy and further simplify the EFI conversion. Or you can set up a diving board at the edge of the slope and get a running start. ITBs, EFI, EDIS/COP, full sequential ignition & injection, etc.

I'd recommend figuring out exactly what you want.
Then figure out who will get you there. DIY? Shop? If shop, which shop?
See if those plans align with your budget, and then before you spend a cent, read up as much as you can on the whole system you've chosen. At very least, it'll be nice to explain what you have at cars & coffee. At the most, you'll install and tune it yourself and then be able to share your experiences here.

I've done this before I did my 911 and there are things I'm keen to redo. There is simply no replacement for experience here.

EDIT: Someone mentioned above that ITBs & EFI run a high idle. My car idles nice and smoothly at ~675rpm right now. It's actually too low. It doesn't charge the battery at idle, but it doesn't stall ever. The beauty of EFI is it can be tailored to your exact needs.

[Dpmulvan]

I have a set of triumph throttle bodies and was thinking of going that route. How did you like working with the triumphs?? Is it worth the savings ?

[Phillip_G]

+1 for Al's X-Faktory EFI set-ups and his support. I was tired of sorting CIS issues for several years and so finally went whole hog with my 2.7 including 9.5 P/C set and Mod-S cams along with Al's EFI kit. I selected the PMO throttle bodies and MS2 ECU
Had some delays in getting everything together but finally got it finished and installed back in April. Fired right up using the fuel map supplied by Al. Tuning is still ongoing, but runs great with instant throttle response and a great deal more power.
Currently gathering parts to go distributorless. I think I'm going to go the EDIS route.

Phil

[OSC911]

What would the benefit of going with one of Al’s kits over, say Rasant. I have had a look into the Rasant kits and from reading the install notes, it looks pretty easy. The harness is complete and terminated. Appears that it only requires a power source, hook up tach and a few other bits and pieces and using their base map, it should start. I know there is more to it but it looks to be able to be installed by a non-pro like myself. Are Al’s kits built in a similar fashion re: complete harness and comprehensive instructions. It appeals to me to buy from him, seeing the support he seems to offer. I would be going the PMO/Motec route with COP.

[IS300]

I like the input please continue with your feedback...

One more thing ...... does this hurt the resale??? or help???

[chrisbalich]

Originally Posted by Dpmulvan

I have a set of triumph throttle bodies and was thinking of going that route. How did you like working with the triumphs?? Is it worth the savings ?

I haven't been on a dyno yet to verify numbers, but I feel like I'm close to 200whp. In my [somewhat light] car, it feels exactly right. I am still working on the calibration as I'm doing it all myself. But with the 42mm throats, the Triumphs offer good part-throttle modulation and plenty of air gets through at WOT.
I like them and I like to DIY as much as possible. The Triumph-based builder kit was perfect for me.

Originally Posted by OSC911

What would the benefit of going with one of Al’s kits over, say Rasant. I have had a look into the Rasant kits and from reading the install notes, it looks pretty easy. The harness is complete and terminated. Appears that it only requires a power source, hook up tach and a few other bits and pieces and using their base map, it should start. I know there is more to it but it looks to be able to be installed by a non-pro like myself. Are Al’s kits built in a similar fashion re: complete harness and comprehensive instructions. It appeals to me to buy from him, seeing the support he seems to offer. I would be going the PMO/Motec route with COP.

The biggest standout that Al's kits offer over Rasant is price. I'm into my X-Faktory kit, MS, all the related bits, etc for less than a set of PMOs.
The Rasant kits are incredibly nice. And if you order a complete solution, the harnesses are fantastic as well as the ITBs. They're really very very nice.
But they're spicy. For my project, I had pretty strict financial limitations so I went with Al's builder kit. If I'd had unlimited/more funds, I would have given the Rasant kit a go. As much as I like to tinker/build, it is really nice to be able to bolt something together and go sometimes.
I can't speak for Al's more complete kits as I didn't purchase one.

[Phillip_G]

Anthony,

My experience with going from CIS to EFI was very similar to what Chris M is currently going through and he described in post #10. I decided to hold off on the ignition control by the ECM until I was confident that I had the fuel delivery sorted.

After looking at trying to gather and assemble all the components myself, it seemed well worth the extra cost to go with the kit from Al. He is well respected in the community and responsive with his support. I also appreciated the fact that he had recently built several 2.7s with very similar specs to what I was going for. What he refers to as a 2.7 RS+

With regard to helping or hurting the cars value; I think that depends on what car you have. In my case it was a 74 911 coupe with non-original 2.7S engine. While is was a nice rust free car in a rare color, it was nothing special. If you have a rare model or very clean original car you will likely hurt the value with mods, but that's a personal choice. I was not building a car to maximize it's market value, I was building a cool, quick and reliable car that I can drive and enjoy.

Phil G

[OSC911]

I have a really nice’76 in a rare colour also. But it isn’t anything special ether. Has a 3 litre so not matching numbers or anything like that. I think in a car like mine, it might actually help the resale. I had a 1 owner 60k mile sc a few years ago that I was scared to even modify from factory when I had it. Didn’t really enjoy it like I do this one and would have never even contemplated putting ITB on it. Horses for courses. But my mid year, I’m looking forward to going ITB/EFI.