ITB Recommendations

[Henry Schmidt]

I never said, try to deceive anyone. I actually said,
A lack of disclosure may be dishonest.

Most people who own classic Porsches document everything including a case replacement.

[AintGotNoGasInI]

Topper performance tuning makes a pretty good ITB set up, pretty affordable as well. I'm installing them on my car currently. Dual DBW in my opinion is a massive benefit in ITB'S. for my purposes I wouldn't purchase ITB's without them

Tyler, the owner of the company is very helpful. I'm sure if you contacted him, he'd help you out

[Turbo_pro]

Back on topic after the silly trip down obsession lane: WTF is that?

Race Head has some pretty cool options. I saw a set on 3.8 engine in a transplant to an 87 Carrera. Carbon Rain hats are stellar.

https://racehead.com.au/product/porsche-964-993-itb-kit/

[Nk993]

Theres also some guy in denmark producing barrel throttle ITBs... DRS developments installed them on their to replace the AT power ones, but havent seen any updates from them in a long time, so dont know if they tested it yet.

they mention it here: https://youtu.be/HvX98EC3SIM?si=8EyplpJjClxBbk4n&t=667

[rcguerena33]

ITB talk gets everyone fired up! Ha.

I'm really leaning towards the AT Power ITB's based on some of the above info and their overall adaptablity. Kinsler is a close second... with the M130 I'm running we can only do a single DBW motor setup. Last option is to convert the existing 9M to a DBW but I'd still be out of idle air control monitoring throught the ECU.

We'll see how testing looks next week and figure out next steps from there. Thanks all for the help and keep you posted.

[Jeff Alton]

We have used many over the years. Not going to say what is best...

For a traditional butterfly style, we like Jenvey. Used them countless times with great results every time. We have also used PMO, Clewett, TWM (borla now?) Hargett (did some testing for them and not even sure if they are around?) and RHD.

Our go to is the Jenvey, high quality, easy to adjust and maintain their adjustment. We adapt the throttle set up a little to our liking. On same engines, they made more power than the PMO's but the PMO looks like a weber.

Jenvey also offers their heritage line, which looks amazing if you want a carb look, as injectors are hidden. We have not tested those. The Clewetts are very functional, everything is well thought out mechanically, just aestetically, they are a little "cludgy".

Was not impressed with the RHD at all. Too many pieces involved (I get it, modular to fit many applications) the linkage seems a little "light" for the appplication and they had a complete lack of instructions/tips with the kit. Client really wanted them, so we got a set.... They perofrmed well, but just not quite what we were looking for.

Not tried the AT Power ones, may some day soon. The clients we have built motor for with the all of the listed ITB's have been thrilled with the performance, driveability and throttle response. So we are happy.

Your ECU choice and tuner choice are likely more important to get good performance and driveability.

Cheers