I realize the following is a picture of a one-off, custom-made, dual-plenum intake manifold for a pushrod 60^o Fiero V6, but does anybody make some that are not just a "one-off" creation?


Some time ago, fellow PFF member, toddshotrods, had investigated and discussed manufacturing some dual-plenum intake manifolds for the pushrod 60^o V6. However, he apparently has abandoned that idea.

Later, fellow PFF member, Oslo, mentioned in regard to TLG Automotive that "The dual plenum intakes...are still being developed. We are currently acquiring intake manifolds and throttle bodies and very soon our test vehicle will be ready for mock-ups." That was back in March 2009, but I haven't heard anything further on that since then.

Does anybody know of someone who currently, or is about to, manufacture dual-plenum intake manifolds like the one pictured above, but not a "one-off" creation?

Nope. No one makes them/mass produces them. Awhile back I was fortunate enough to get one from another member, however I may not use it as I am thinking of doing a carbed Ecotec with twin dcoe's. It is rough and at best a prototype, but it did work. I might be willing to sell it, though you will need to work out the vacuum lines, and probably do a bit better job of the throttle linkage.

I've been tempted to make one just to sell. I have the parts laying around but if I built it I wouldn't be able to make it work before selling it without the rest of the engine.

This project is still on the shelf for us. The problem is finding a competent fabricator around here that is interested in helping us develop this. I don't do welding myself otherwise we would have had something finished up by now.

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Top Line Group Automotive
-Aftermarket accessories for the Fiero
www.TLG-auto.com

quote Originally posted by project34:

You see, to me, that doesn't look too hard to make, Just find 2 cylinders like that, polish em up, get 2 TB's and hook them up like in the picture, and then add some ports for the vacuum lines! A lot easier said then done though.

Very nice looking and clean.

One of the most difficult parts of this product is mastering how to connect the two throttle bodies so they open together and make it look nice.

quote Originally posted by Oslo: One of the most difficult parts of this product is mastering how to connect the two throttle bodies so they open together and make it look nice.

Looks like they figured that one out judging from the above pic. Looks like they extended the TB butterfly shaft (or made some sort of abapter rod) from one TB long enough to reach the second TB...

quote Originally posted by ALJR: Looks like they figured that one out judging from the above pic. Looks like they extended the TB butterfly shaft (or made some sort of abapter rod) from one TB long enough to reach the second TB...

Yea that's what it looks like to me too. I do have a mockup of that part of the project finished, but on the majority of DIY dual-plenum intakes I've seen that part of the product didn't turn out too well.

The end of the throttle shaft is taped 6-32 to hold on the arm that rotates the TPS. The shaft is very hard steel. The adapter shaft is taped in the end 6-32, insert a short threaded peice and locktite in place. It cannot unscrew anyway. The other end is just a 3/8 to 3/8 rod coupling. You set the throttle plate gap with a fealer gauge and tighten the set screws. The main trick is to make sure these throttle shaft bores are inline before you weld the flanges in place.

Good Luck

Tom Slick

I have also noticed several chryslers coming through where I work with dual throttle body intakes. There are a few intrepids I see with similar stock setups. They seem to have a similar setup to the one above.

Just thought I'd share

Some of the units I've seen posted here aren't quote as polished as the one pictured above.

I decided to pass on this one when it was being advertised in the Mall.

quote Originally posted by Oslo: One of the most difficult parts of this product is mastering how to connect the two throttle bodies so they open together and make it look nice.

Electric servos, cable-less linkage. ECM operated???

Just thinking out loud..

Spoon

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Two yeast spent their entire life "about 2 days" discussing what the purpose of life could be and not once did they even come close to the fact that they were making champagne. Quoted by: Unknown

I think Top Line Group was going to make something like that, but none so far.

quote Originally posted by TopNotch: I think Top Line Group was going to make something like that, but none so far.

Well, you're right, but that is who Oslo was speaking for in his earlier post to this thread:

quote Originally posted by Oslo: This project is still on the shelf for us. The problem is finding a competent fabricator around here that is interested in helping us develop this. I don't do welding myself otherwise we would have had something finished up by now. ------------------ Top Line Group Automotive -Aftermarket accessories for the Fiero www.TLG-auto.com