Contour Enthusiasts Group Archives Forums Modifications Duratec Performance Terry Q again. The "restriction"

Had a close look at the Yamaha 3.0 in the late, lamented Taurus SHO. It uses an upper IM similiar to ours. If you look at the feed from the t-body to the L&R plenums it's a nice, gradual curve. I gather that packaging restrictions caused ours to be a sharp turn(s). I'm thinking that it might make more sense to cut apart the upper, and reprofile the passageways from the inlet to the plenums. It would be way cheaper than sending it to Xhone, and my guess is it would be much more effective too. Plus, I've got 2 spare upper IM's.

Oh yes, the SHO motor uses the plenum connector/variable valve arrangement as discussed earlier.

isn't the Yamaha/SHO upper IM also made of several pieces conected by flexible tubes and hose clamps?

If you have spare IMs why don't you do this, make it more similar to the SHO IM.

I'm telling you guys ... a fully mandrel bent fabbed intake

Yes the SHO upper is a whole lotta' pieces clamped together with flex tube. A tubular upper like the 5.0 GT40 intake would look and flow great-IMHO. Who's going to fab it though?

I've got a kinda' crappy res pic of the t-body spacer. I'm just figuring out the "how-to" post it with my text. It's coming...

woo hoo...

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I think I got that part right, but the shot is on a floppy, not on a website. What to do?

E-mail it to me and I can post it for you...

PM me if interested or just get my email off my site (at bottom)

I already PM'd you!

What if we do try to fab an upper IM with plastics? If we can look for plastic tubing and thick sheets to cut the flanges from then perhaps we can create a 'tuned' IM. It's probably too much work right now though, I've enough to do already.

warmonger

I like that idea. You'd need to re-utilize the cast IM entry and the lower portion where the bolts attach. Then put the whole thing together with silicone hose and clamps!