914 ITB's, Pro's and Cons, option opinions and show us your setup!! |
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914 ITB's, Pro's and Cons, option opinions and show us your setup!! |
Steve |
Mar 23 2021, 02:15 PM
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#1
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914 Guru Group: Members Posts: 5,614 Joined: 14-June 03 From: Orange County, CA Member No.: 822 Region Association: Southern California |
It seems like ITB's are all the rage with our air cooled sixes.
The throttle bodies are either PMO or direct to head either with butterflies or AT-Power with no butterflies. Mark dug up some of the pricing!! Thanks Mark!! X-Faktory uses Megasquirt, Link or Motec M84 https://www.x-faktory.com/uploads/6/3/9/3/6...efi_systems.pdf Starting at $4754 Clewett uses TEC https://www.clewett.com/index.php?main_page...dex&cPath=2 Starting at $8400 Rasant uses exclusively Motec, which is the most expensive https://rasantproducts.com/collections/mote...84-ecu-packages Starting at $5700 for the ITB's and $6200 for the EFI AT-Power offers throttle bodies without butterflies, but use special cams to optimize https://www.atpower.com/ Starting at $13K Lots of options which can raise or lower the price. I have a stock Euro 3.2 with DME that does run fine, but I miss the sound of the webers, but I don't miss the hassle of webers, cold start, poor gas mileage, etc. I know ITB's are expensive, but option 2 at X-Faktory is not that bad and pretty popular over on the Pelican 911 technical forum. Anybody on this forum have any experience with any of these toys? |
mepstein |
Mar 23 2021, 03:22 PM
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#2
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914-6 GT in waiting Group: Members Posts: 19,316 Joined: 19-September 09 From: Landenberg, PA/Wilmington, DE Member No.: 10,825 Region Association: MidAtlantic Region |
Slippery slope (IMG:style_emoticons/default/biggrin.gif)
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Steve |
Mar 23 2021, 03:36 PM
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#3
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914 Guru Group: Members Posts: 5,614 Joined: 14-June 03 From: Orange County, CA Member No.: 822 Region Association: Southern California |
(IMG:style_emoticons/default/agree.gif) If your going for horsepower than your better off upgrading to a 3.6 from a 3.2. Probably around the same price. The hp gains from ITB’s on a stock motor are around 20 hp for a 3.0 or 3.2 motor. Best gains seem to be on a CIS motor. |
mepstein |
Mar 23 2021, 04:37 PM
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#4
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914-6 GT in waiting Group: Members Posts: 19,316 Joined: 19-September 09 From: Landenberg, PA/Wilmington, DE Member No.: 10,825 Region Association: MidAtlantic Region |
(IMG:style_emoticons/default/agree.gif) If your going for horsepower than your better off upgrading to a 3.6 from a 3.2. Probably around the same price. The hp gains from ITB’s on a stock motor are around 20 hp for a 3.0 or 3.2 motor. Best gains seem to be on a CIS motor. I think you usually go for itb’s so you can use more aggressive cams, compression, etc. Peter Dawe said the stock manifold is good for up to 300hp. We have an engine at the shop with 290 rear wheel hp that he helped to build. It has itb’s, but is a 3.5 built on a 3.2 case. There is a good market for used 3.2 parts but from just a HP perspective, the conversion doesn’t make $ sense. If it makes you happy, then it’s worth it. |
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