Z Intake Plenum Constructoin

[spawpoet]

If anyone needs the stock backplates we have several layign around the shop you could have cheaper than from ebay (was going to ebay all but 1). I don't know if there were differences between the 240 and 260 backing plates though. Where can the pipercross filter be found???

[pballance]

Got mine here http://www.truechoice.com/prodinfo.a...er=PIP%20C603D
But I sure don't remember paying that much.

[Mike Mackaman]

The easiest way to tell the 240 and 260 apart is that the 240 air horns are round, the 260 are rectangular. Other than that they are both orange. not sure about size. The 260 also bolts on with three fasteners per carb.

Mike

[Parrish57]

OK... I got a response from Topeka yesterday. I sent an email to John Bauer, a tech assistant. The email had a photo of a stock air cleaner box backing plate, a modified backing plate that retains the stock air horns, some modified stock air horns, and some aftermarket replacement air horns. I gave a written review of the rule and arguments for/against each prep level based on the GCR.

After reviewing my submission he called me to discuss it. To put it in a nutshell, he said that his interpretation would be that the stock air cleaner may be modified, but if you want to run velocity stacks you have to use the stock ones. He didn't fell like the second sentence gave any wiggle room on that. He did say that he thought that it would be OK to cut the velocity stacks from the backing plate and use them with any air filter you choose.

Note that this is not a formal "rules clarification". So without that $250 piece of paper it would be up to the stewards interpretation if someone had heartburn with your setup and protested you. It's good enough for me. I'm comfortable with my modified air box and OEM velocity stacks.

[Ron Earp]

It's good enough for me. I'm comfortable with my modified air box and OEM velocity stacks.

I am too, that is, I completely agree. You are using a stock piece and you are allowed to modify things in front of the carbs. You can certainly drill holes in the backing plate, right? You could snip off a piece of the backing plate to allow a hose to route around it, correct? Well then you've just snipped off the rest of the plate and left the stacks, seems like a good idea.

I need to find a plate for a 260Z so I can get to making my car all legal and make a new air box.

Anyone have a line on a stock piece for a 260Z?

Ron

[spawpoet]

"I need to find a plate for a 260Z so I can get to making my car all legal and make a new air box.

Anyone have a line on a stock piece for a 260Z?"



I'll check and see if we have one around. Inherited a warehouse with a ton of old datsun parts. Will get back to you this pm.

[spawpoet]

Ron,

I'm told we have a couple of 260z backplates though I haven't seen them with my own eyes. Email me at [email protected] if you would like one, and I'll be able to verify for sure by tonight that we actually have it.

chris

[Prince Makaha]

May not be what you're looking for but good discussion none the less.

http://forums.hybridz.org/showthread.php?t=111342

Interesting picture........of course for a turbo car but I do see carbs and a plenum in this thread.

http://forums.hybridz.org/showthread.php?t=127595