Hello - I recently saw something interesting on Ebay - Roush intake runner wedges for a Cleveland. I suspect these may be intended to increase port velocity on the 4v heads. Anyone know for sure? Are they still available?

I have a 351 CJ and the heads need attention. I am trying decide whether to just rebuild the 4V heads, or to switch to some 2V heads and have them modified for the larger 4V valves. I know about the aussie heads but I really am not sure about the resulting 11:1 compression - and the cost.

Tom

 

Yes they are designed to increase the low end response on 4V heads by increasing the port velocity of the A/F mixture. As far as I know they are still available. You still have to contend with the lousy exhaust ports on the 4V heads which are worse than the 2V heads.

 

 

MPG Head Service in Denver has them. I don't know if their Roush or their own. Their number is 303/762-8196

 

Another place that carries them is Price Motorsports Eng. In Indiana
there number is 812-546-4220. they also have this really cool new intake spacer plates the use to be sold by Weiand.There's is all one piece and seals off the lifter valley.

 

>MPG Head Service in Denver has them. I don't know if their
>Roush or their own. Their number is 303/762-8196

BTW - for anyone having 4v heads and considering swapping to 2v heads to improve port velocity - you MUST check out MPG's solution. They have engineered a set of intake and exhaust port plates/gaskets made of steel - which have a piece of steel bent into each port to reshape the port. These go for something like $90 and look to be much easier to install than the earlier wedge designs. They also sell a windage tray!

see http://www.mpgheads.com/port_plates.htm

Tom

 

Price Motorsport has a web site:

http://www.pricemotorsport.com

besides the Roush intake runner wedges, they have got intake adapters for any head/block/intake swap you can imagine! also very helpful & friendly. Mrs. Price has ported heads for years, and told me that after installing the wedges it just took a minute or so with a sanding drum on each port. the wedges are longer than the ports though, so the part that sticks out has to be milled off (to fit) after they're installed. sounded pretty though. they're also coming out with an intake that fits the wedged ports, maybe as early as february '02. i think she said it would be a single plane. they also have head-swap intakes for 2v or 4v heads on a 351W block.

"parker" is an australian company that makes wedges similar to roush. they also make the "funnel-web" intakes, which match the intake ports with their wedges...

 

Greetings, all! I wanted to share some info concerning the Roush Intake Wedges. I have a set, purchased from a guy named "Red" at Roush's facility about two years ago. At the time, they still had them in stock. Now, for the good stuff: Flow numbers.......
Being a head porter, I just had to try them on my Boss heads. The MPG plates are effective, but can cause a bit a turbulence at the short side of the runner (as it turns into the intake bowl). I pulled off the shelve a set of 70 Boss 351 heads, untouched ports. My flowbench showed a peak flow of 271cfm at .650 lift (that day, that barometric pressure). After I epoxied the wedges and performed some minor shaping of wedge to match existing port contour, I flowed the runner again. The runner now flowed a stout 297 cfm, on 1/3 less port(!), without even touching the bowl or the rest of the port. This strongly indicates that a higher flow with a (now) smaller runner/port means a dramatic increase in velocity. Just what you want for good cylinder filling. I have yet to finish this project (never enough time), but I am estimating a total of 330-350cfm when I am finished with bowl and short-side work. Just thought you might like to know.
P.S. - If anyone out there has an old, single MPG intake plate they can spare, i would love to test it on the bench and determine actual flow gains. All in the name of science. (polygram77(No Email Addresses In Posts!))