Triumph ITB - AEM Infinity Project

[J-Boy]

Hi Guys, hi Clay.

Great thread, Thanks for alot, ive used loads of this info (and stuff that Al posted in the past) in my 2.7 triumph ITB project. its coming along nicely and the car runs but i have some idling issues and im not to happy whit the VE table, The VE might just take a while and i guess nothing runs perfect untill its been through the dyno.

Question, what idle rpm do i aim for? cold/hot. (s-cam)

Thanks again for a great thread and loads of inspiration.

//jonas

[lvporschepilot]

Originally Posted by J-Boy

Hi Guys, hi Clay.

Great thread, Thanks for alot, ive used loads of this info (and stuff that Al posted in the past) in my 2.7 triumph ITB project. its coming along nicely and the car runs but i have some idling issues and im not to happy whit the VE table, The VE might just take a while and i guess nothing runs perfect untill its been through the dyno.

Question, what idle rpm do i aim for? cold/hot. (s-cam)

Thanks again for a great thread and loads of inspiration.

//jonas

Is there not a learning function built into the software for the ECU you're running?

[al lkosmal]

J-boy....This is a broad generalization, but I have found that many of the engines I've built with EFI/ITB setups...idle best at 1000-1100 RPM or so (higher than you may be used to) and I run the idle at 13.5 A/F or so. They're all a little different, but those values will get you into the ballpark. And although quite few of my customers have been to the dyno and they are definitely a good tool...I have never tuned on a dyno myself.

regards,
al

[Pehlen]

Originally Posted by al lkosmal

J-boy....This is a broad generalization, but I have found that many of the engines I've built with EFI/ITB setups...idle best at 1000-1100 RPM or so (higher than you may be used to) and I run the idle at 13.5 A/F or so. There all a little different, but those values will get you into the ballpark. And although quite few of my customers have been to the dyno and they are definitely a good tool...I have never tuned on a dyno myself.

regards,
al

+1 ^ I have to retard ignition a bit at idle, using one of the AEM tables, to achieve ~1100 RPM after I've cross tuned the throttle bodies with a synchrometer.


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[pampadori]

I idle at 1200 if the temp is < 100F and 1000 RPM above that temp.
I use this table below to trim the ign timing to fine tune the idle instead of modifying the main ign table. Set the target idle RPM table up first, synce ITBs and get it close to target with the throttle stops and then configure the table below to dial it in:



The table values aren't my actual, just an image i found quickly online. I think I have values about double these but not near the files at the moment.

Many of the other idle tables seem to be mostly useful if you are running an IACV of some sort which I'm not.

[J-Boy]

Cheers guys.

Im a few hundred rpm below that,,. aiming for 900ish. will try to get a more reliable idle at 1000-1100 with this in mind now. And i will take my VE to the street alot more before i take it to the dyno, not looking to optimize to the edge, just a nicer smother ride.
..let you know what this gives...

//

[Pehlen]

Originally Posted by pampadori

I idle at 1200 if the temp is < 100F and 1000 RPM above that temp.

I use this table below to trim the ign timing to fine tune the idle instead of modifying the main ign table. Set the target idle RPM table up first, synce ITBs and get it close to target with the throttle stops and then configure the table below to dial it in:







The table values aren't my actual, just an image i found quickly online. I think I have values about double these but not near the files at the moment.



Many of the other idle tables seem to be mostly useful if you are running an IACV of some sort which I'm not.

That's how I do it


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[Nux]

I'm almost done with my install now. It's has been quite easy to convert the Bitz EFI on CIS intake to Clay's ITB, with only very minor fitting issues. Started her up yesterday. Naturally, it needs to be balanced - but hey: It's alive again!

Still haven't found some good velocity stacks, but I'm working on that!

[al lkosmal]

Nux,

looking good!

regards,
al

[sithot]

https://www.dellorto.co.uk/

These are very nice on 40mm Webers.

https://www.dellorto.co.uk/shop/car-accessories/car-air-filters-trumpets/full-radius-trumpets/bolt-on-40mm-x-50mm-long/

They also make motorcycle pieces that may work if you cannot bolt them down.

Good luck!

[Nux]

Thanks Al!

Sithot,

Thanks I'll look into those, but I would like somewhat longer stacks (100-120mm) to get air harmonics around max 6-7000 revs (see earlier post).

Maybe Al can comment on on the length of the stacks? According to the schematic I posted earlier - I would need appx 20-22inches from intake valve. This means I need very high stacks!

[al lkosmal]

One of my customers sent me this short video of his 911 after installation of an x-faktory EFI/ITB kit........My 1st install in malaysia.

79 big port 3.0, running 9.5:1 JE pistons, Dougherty GT102 cams,
Headers, M&K exhaust.
now with x-faktory/PMO/AEM Infinity (Rasant) EFI system

The engine is a 79 big port 3.0, running 9.5:1 JE pistons, Dougherty GT102 cams,
Headers, M&K exhaust.

https://www.youtube.com/edit?o=U&video_id=1JHxoipO170


regards,
al

[RDM]

Originally Posted by al lkosmal

One of my customers sent me this short video of his 911 after installation of an x-faktory EFI/ITB kit........My 1st install in malaysia.

79 big port 3.0, running 9.5:1 JE pistons, Dougherty GT102 cams,
Headers, M&K exhaust.
now with x-faktory/PMO/AEM Infinity (Rasant) EFI system

The engine is a 79 big port 3.0, running 9.5:1 JE pistons, Dougherty GT102 cams,
Headers, M&K exhaust.

https://www.youtube.com/edit?o=U&video_id=1JHxoipO170


regards,
al

Link isn't working for me. What is he doing for spark?

[al lkosmal]

RDM....I just clicked on the link and it worked fine. spark is provided via the AEM Engine Position Module (EPM), AEM Infinity ECU and COPs.

regards,
al

[75 911s]

Here's the vid (didn't work for me either but I found it on Al's yt channel. Doesn't show the motor unfortunately)

[J-Boy]

Looks great Nux, thanks for sharing.

[Nux]

up and running, balanced and sweeeet! Time to dance

https://www.youtube.com/watch?v=QtbJGytDYOY

[al lkosmal]

Nice job Nux...sounds great!

[Clay.0]

Good job Martin! Sounds good and nice dance!

[lvporschepilot]

Originally Posted by Nux

up and running, balanced and sweeeet! Time to dance

https://www.youtube.com/watch?v=QtbJGytDYOY

great job. looks awesome.