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A good few years back George (Cowboy from Hell) drew our attention to a Cleveland IDF pattern IR manifold manufactured by Cain in Australia. It has been out of production for many years and became 'unobtainium', leaving the only option for those wanting to use a Weber IDF carb setup to obtain an IDA style manifold and use IDF adapters. The adapters raise the carbs significantly, requiring removal of the screen and decklid notching like IDA's. The IDF carbs are reputedly more streetable than the IDA's and the Cain manifold maintains the carbs low enough it allows use of the IDF's with filters all of which will clear the decklid/screen.

I few years ago Auspeed acquired the rights to the Cain manifold and I have been following the progress (slow) of production of the IDF manifold by Auspeed. That manifold is now available and I have been quoted AUS$825 + shipping (from Australia). With the US greenback in the dumps, there isn't much on current exchange rates and the manifold works out at US$810. Previously Auspeed alluded to a discount for a group buy, so dual purpose of this thread is to a) make those unaware that the option to use IDF's and retain stock screen/decklid is areal one and b) resurrect the old discussion and see who (old or new) is interested in a group buy. Auspeed won't commit to a discount until we have some numbers but I'd expect to get at least 10% on up to five, more if we can get higher buy in. Anyone half way seriously interested?

Here is the original thread whith discussion and photos.

http://pantera.infopop.cc/eve/...562/m/9750043874/p/1

Julian
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I would. Am considering a Weber conversion since quite a while, been looking into the subject off and on, but gave priority to other stuff first. Still, the plan is to go for Webers this year, not necessarily installed yet, but at least on the shelf.

No need to cut in the hood is sure a big advantage of the IDF’s, but IDA’s look better imo. The availability of an adaptorless IDF manifold, gives me food for thought…
Last edited by kid
quote:
Originally posted by Joules5:....and the Cain manifold maintains the carbs low enough it allows use of the IDF's with filters all of which will clear the decklid/screen. Julian


I've never actually had my hands on one of the Cain intakes but the total height from the valley rail to the top of the air filters will need to be <10" on a 9.2" deck Cleveland to have a chance to sit under the decklid. This can vary some with the condition of your engine isololators. Even at this, you may find even though the filter assemblies fit under the decklid, they can still run into the engine cover where it curls down to meet the fire wall depending upon how far the filters project forward. Happen to know what height filter element it takes to get under 10" OAH with that intake and IDFs? George may have previously done the leg work on this. I would think in general you'd like to see at least 2" of filter height for proper flow and performance reasons. I took a quick spin through the 5 pages on that thread and looked at the picture George had posted [page 5 of link above). I noticed that was not the Cain intake on Kjell's car. Looks to be three pieces of billet and might be a bit shorter than the Cain intake. It does look like it has plenty of deck lid clearnace.

Julian, are you going to run that intake on 4V Cleve heads? What displacement engine? Your 393 CI?

Best,
K
Kelly,

My intention is to run this setup on my GT5, 351C ~470HP and at the same time swapping to a set of CHI 4V heads.

For the 393 I have a 2 5/8" Kinsler mechanical setup that I'm converting to EFI to handle the 625HP and aggressive cam. Plus that decklid was already cut for Webers

I have 48IDF carbs here and they are exactly 4" tall. The manifold photo Auspeed sent has the flanges at about equivalent height to Kjell's setup (not Cain). From that photo and knowing the manifold bolt hole distance I would estimate the flange to be approximately 3" above the valley rail. Assuming that is correct it would leave 3" for a filter and your clearance. I will ask Auspeed for a more exact measurement.

Julian

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quote:
Originally posted by Joules5: My intention is to run this setup on my GT5, 351C ~470HP and at the same time swapping to a set of CHI 4V heads.


That should be a nice combo.

quote:
For the 393 I have a 2 5/8" Kinsler mechanical setup that I'm converting to EFI to handle the 625HP and aggressive cam. Plus that decklid was already cut for Webers


Also a good choice. Is it a track car? Might be a little digital at the low Rs. Some good progressive linkage helps.

quote:
I have 48IDF carbs here and they are exactly 4" tall. The manifold photo Auspeed sent has the flanges at about equivalent height to Kjell's setup (not Cain). From that photo and knowing the manifold bolt hole distance I would estimate the flange to be approximately 3" above the valley rail. Assuming that is correct it would leave 3" for a filter and your clearance. I will ask Auspeed for a more exact measurement.


I think you'll be in good shape for clearance. My car is 9 3/4" from the valley rail on the 9.5" deck engine block to the rib on the underside of the deck lid.

Best,
Kelly
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