Triumph ITB - AEM Infinity Project

[Clay.0]

Here are a few more pictures of the linkage parts off the car











And installed:

[chrisbalich]

great right-up, Clay. really spells it out clearly!

Thanks!

[Nux]

I should maybe also clarify: As far as I know, this kit is by far the simplest, easiest and cheapest way to go ITB. It works well, with only very minor issues, that can be sorted out with a little fiddling. Clay's support has been very good and this thread has helped me many times (big thanks to Al as well!)

In fact, I just did a 1200 mile road trip to the Belgian F1 at Spa with no issues at all (I need to change to TPS though). I have recommended this kit to my local Porsche nerds as a cheap DIY approach alternative to the factory kits.

I'm a very happy chap indeed. Cheers from Denmark

On the road somewhere in Germany:

[lvporschepilot]

Originally Posted by Nux

I should maybe also clarify: As far as I know, this kit is by far the simplest, easiest and cheapest way to go ITB. It works well, with only very minor issues, that can be sorted out with a little fiddling. Clay's support has been very good and this thread has helped me many times (big thanks to Al as well!)

In fact, I just did a 1200 mile road trip to the Belgian F1 at Spa with no issues at all (I need to change to TPS though). I have recommended this kit to my local Porsche nerds as a cheap DIY approach alternative to the factory kits.

I'm a very happy chap indeed. Cheers from Denmark

On the road somewhere in Germany:

+1! Clay has been outstanding as well. Great little kit, super effective.

[al lkosmal]

Clay,
Excellent explanation for setting up the linkage and balancing the ITBs. These are essential steps towards a great running engine. Also, a good explanation of the Price/Performance/Features aspect of bringing a product like this to market. There are plenty of "Cost no Object" systems out there and I offer those too, but the original intent of the Speed Triple system was/is to provide a high performing system that is relatively affordable for the DIY crowd (I made my first system for myself). Your products are in alignment with that intent.

Good work....

regards,
al

[Ryan H]

Originally Posted by lvporschepilot

+1! Clay has been outstanding as well. Great little kit, super effective.

+5 Clay is really good people

[Clay.0]

Thanks guys.

[2mAn]

but still no dyno?

Love all of it regardless

[sithot]

Let's see some numbers from these EFI conversions.

For horsepower, carb conversions aren't entirely dead.

Jeff Gamroth/Rothsport:
3.0 liter: Single plug, 911SC cams, 46IDA Webers: 252HP @6500 RPM

[lvporschepilot]

Didn't Dzug dyno his single plug 2.7 a while back? Made something like 220 at the wheels IIRC? Al knows.

[pampadori]

I put down 182whp with '83 US spec small-port heads and factory SC cams and a sport muffler. I have a sneaking suspicion that porting the intake mani's and the a port job on the cylinder heads would really help out with mid and top end.

I added BBE headers since i dyno'ed and felt a nice improvement from 4.5k-7k. But I haven't been back on the rolling road since.

The changes to midrange and light throttle were where I really thought the triumph ITBs and EFI changed the car. Oh, and the reliability and dependability. I literally haven't had to mess with anything be in the system besides the tune.

If i did it all over again I'd have gone ported heads and big cam and 8,000rpm capable items.

[lvporschepilot]

Originally Posted by pampadori

I put down 182whp with '83 US spec small-port heads and factory SC cams and a sport muffler. I have a sneaking suspicion that porting the intake mani's and the a port job on the cylinder heads would really help out with mid and top end.

I added BBE headers since i dyno'ed and felt a nice improvement from 4.5k-7k. But I haven't been back on the rolling road since.

The changes to midrange and light throttle were where I really thought the triumph ITBs and EFI changed the car. Oh, and the reliability and dependability. I literally haven't had to mess with anything be in the system besides the tune.

If i did it all over again I'd have gone ported heads and big cam and 8,000rpm capable items.

What kind of dyno was that on?

[pampadori]

a dynojet. Not sure of the exact model.
The '83 was just the under performer of the 3.0's from what I've seen from other folks' dyno charts.

I'd love to get back and dyno again with the headers to see what they may have freed up.

[lvporschepilot]

Thanks. Mid to low 180s is what a healthy 2.7MFI motor pulls on a dynojet, and that motor is horribly underrated by the factory at a quoted 210, when anyone I've ever spoken to states they are consistently 220-225 at the flywheel, stock.

I haven't strapped my 2.8 to a dyno yet as it's not quite ready, but with these cams it really needed to be tuned by alpha-N i.e. TPS only. MUCH better response and controllability. I'm liking using a type K voltage-based cylinder head temp sensor as well. Wiring it up with a 0-5v analogue booster for AEM brain was a bit of a pain to hide but the response time is super quick.

[2mAn]

if you have the plot, post them! Im always curious what the curves look like

[sithot]

Originally Posted by pampadori

a dynojet. Not sure of the exact model.
The '83 was just the under performer of the 3.0's from what I've seen from other folks' dyno charts.

Porting. '76-'77 Carrera 3.0 and '78-'79 are the free breathers.

[Kraftwerk]

A "know-nothing" here... So how are the '76-'79 3.0 engine's precicely different from the '83 engine?
Bigger ports?
Triumph -Speed-Triple x2 ITB's seems like a legit upgrade ...

[lvporschepilot]

Originally Posted by Kraftwerk

A "know-nothing" here... So how are the '76-'79 3.0 engine's precicely different from the '83 engine?
Bigger ports?
Triumph -Speed-Triple x2 ITB's seems like a legit upgrade ...

Correcto. Earlier years have 39mm ports. Later are a good bit smaller, but with the stock CIS system there really is no difference in power. However, when a system that can really breath is installed (ITBs), the port size issue is clearly articulated.

[2mAn]

I thought 74-77 were 2.7, and then 78+ were 3.0

[sithot]

Originally Posted by 2mAn

I thought 74-77 were 2.7, and then 78+ were 3.0

'76-'77 Carrera 3.0 was never sold here new. Precursor of the 3.0SC. Big intake port engine.
CIS runners were larger as well.