Hot Rods Mid rise intake manifold...

I picked up this Weiand mid rise intake manifold at a swap meet for a decent price. I would like to swap out the Edelbrock performer currently on the car. The reason being that the Weiand has a plug I can knock out and add an oil fill tube. Then I will be able to install old school finned valve covers with no breathers.

My question is; what kind of performance should I expect from a mid rise? I understand that the low end performance would suffer, will it be that noticeable?

I'm trying to rebuild this "T" to an earlier style...

Thanks

 

Getting the combination right is the most important thing...intake, carb, cam, transmission, stall speed if it's an automatic, rear gear ratio, tire size, all play into it.

I would expect better results if you can get the car set up so the engine doesn't have to do any work below 2500 rpm.

If ever an engine was in need of an "earlier style" facelift, that's the one!

 

I'm not fond of open plenum on the street. I put my Performer on the mill at work at bored the boss out to accept filler tube.

 

Single plane intakes more often than not do not work well ay low RPM. A C4B edelbrock or a stock cast iron 300 Hp 327 carter AFB intake will have the oil fill and work better. A aluminum winters GM intake would be great also. It and the C4B are very similar.

 

Yes it will; suffer that is. And be very noticeable. That's a single plane intake and unless your car is a manual trans, you'll need to install a high-stall convertor to make it drivable.

 

The previous owner couldn't give me any information on the engine build, but it sounds like a fairly aggressive cam. The stall speed seems almost nonexistent. When I pull to a stop, the car almost stalls and pulls pretty hard even with the idle set low. Can you recommend a torque converter for this setup? Supposedly the engine (283) has been stroked. Right now it runs strong. My Edelbrock doesn't have an oil fill boss.
Thanks

 

Single plane intakes generally don't produce much usable power until you reach 2000 rpm or so. I've ran one on the street before, but behind a manual trans. Idle speed was around 850, you'd have to rev it to at least 1500 to generate enough power to pull away from a light (with careful slipping of the clutch). As others noted above, real power doesn't show up until about 2500 rpm. They're really designed as race intakes, any power gains over a dual-plane will be well above 5000 rpm.

A high stall convertor along with the intake will seriously affect fuel economy and low-speed drivability. Due to your light car weight, you'll probably need a pretty high stall speed, I would definitely contact a supplier for advice if you're determined to use it.

If all you're basically after is the intake oil fill, you'll be far better off finding a early-style dual plane such as the ones Old Wolf recommended.

 

Thanks guys! I have access to a 327 intake I gave to a friend around 15 years ago and he never used it. I'm sure he will have no problem giving it back! Also included the Carter AFB carb. I will add the mid rise to my flea market stash along with the other parts I pull off the engine.