my friend has a street driven peri-port 13b in a gsl-se chassis and he wants to converted to use the original street ported sidehousings, so he can use it as a week end car , he doesnt have money to buy new or used housings ,so i told him if he could fabricate some plugs (not permanent ) to plug the periferal ports and use his holley 650 set-up for street use and still retain his periferal ports for racing ,he has two manifolds one periferal one normal ,like i said he runs a holley 650 set-up.




i dont think there would be any problems with this set up what do you guys think?

will this work?

 

no one have a clue if this would work?

 

prolly going to get loss of vacume or bad overlap. don't think it's doable.... a machined plug with a perfect curvature to fit the housing surface within .040 of apex path, maybe less.. you'd prolly still see weird idle issues, maybe not so bad up top.. there are other issues like oil/gas build up in the pocket.. please don't quote me, just thinking outloud....

 

i'd assume unless you get the ports plugged absolutely flush with the face of the rotor housings, you'll get all the downfalls of heavy overlap, but without any of the benefits.

 

yes it wil work, the only problem is when you plug something like that if you dont use it often there will be a lot of carbon buildup there. this will be a severe case if that pport doesnt get used often. these chunk of carbon eventually will break off and go into the engine.

the closed off chamber will act as an air tank but it doesnt make a great deal of overlap issue, there is only so much air that could be trapped in there so its effect is minimal.

 

i think if the plug was flush with the housing it would work

 

the plug might not need to be perfectly flush to work. there is a nonflush part where the sparkplug is, and where the sparkplug is is very critical area. carbon build up would definitely be the biggest problem.

 

it doesnt have to be

 

Not to mention, the Bigger problem. Plugging up the side ports, when he wants to run the peripheral port.

Tell him to get another 7.

 

he already started the fab work, he just finished some block off plates for the side housings

 

I really don't think that much carbon would develope on that side of the engine within the closed ports because there isn't any cumbustion going on there. I could be wrong though.

 

I have a friend who does this, he has 2 manifolds, 1 blocks off the side ports and runs on the p ports, the other blocks off the p ports and runs on the side ports. He gets no carbon build up and has no problems at all.

 

throw up some pics and results when it's done.
i'm curious to see what the drivability will be like.

 

pport housings are worth a lot, sell em or trade em for normal hosuings

 

hell no, that engine is puting down 290 rwhp

 

Does your friend post here? I would love to see some pics of his set-up.

 

No he doesn't. I'll take some pics next time he drives it here.

 

now that I think about it, t-von is right, the port probably wouldn't pick up any carbon build up since there is no combustion there. hmmmm. thats alot of hp, what kind of rpms does that pport engine run at.