That looks great in theory, but getting it all to fit with the center runners next to each other is going to prove to be a big problem.

 

I was thinking sheet metal, I'm not sure that I could get the equipment (or budget) to do all billet parts. It would be cool though.

Are you talking about my drawing or the TPI? Obviously my drawing is based on LS1 heads (for simplicity) though I know it's an obvious sacrifice in hood clearance compared to the stock design.

I do believe, however, that it could be made to work with the LT1 port pattern. I'll try tonight, might even add flanges and re-draw it to a proper scale (current drawing has 16" plenums, 4" in diameter).

Jeremy

 

Hey engineermike, you now have multiple posts saying it's not practical, it's a waste of time, it will never happen. We get your point. From your posts one would think that you aren't interested in such a project but the posts keep coming. Why not just lurk or add something constructive?

50 ft. lbs at 3000 RPM's is not what I'd call a small gain when you can do it and still have a manifold that is optimized for high RPM peak power too. I believe the gains at part throttle are even more impressive as a percentage because the intake tract sees lots of vaccum. The charge inertia and resonance tuning combine to help cram much more air in there under light load. If you think there are too many things to go wrong then maybe you haven't fab'ed many projects of this complexity level. I have. You have to visualize everything down to the last detail and put it on paper, then the inevitable things you didn't think of are generally manageable. Experience helps a lot here. I Already have a stroker crank going in so that suggestion is covered. As for the victor EFI intake, I'm looking into lengthening the TPI runners by around 5 inches which will reduce the tuning RPM range by about 500 RPM's. With a mild 2400 to 2800 RPM stall converter the difference in lowend between the VIC and TPI would be hard to feel unless the converter clutch is locked ( light throttle cruise).

The way I've known I was at 25% throttle in the past was to rig a stop on the throttle linkage and read the TPS voltage to set it. Press the throttle until you hit the stop and voila, you're at 25% throttle every time.

Gus, your sketch looks very much like the one I'd worked out on the TPI system. I have a butterfly valve at the bottom end of the short runner where it ties into the top of the long runner in the base manifold. If I can work out the height so it will fit I think this is the most time effective way to do it.

Jeremy, your sketch is nice. I think the height limitation in this application would make your design difficult to get a 9" long runner for the short one. Ideally the short runner would also be angled in so the air wouldn't have to make a 90 degree turn. To get 9 inches from the plenum to the head on the short runners I think an angled approach is going to be required.

 

I have that worked out already, when I get time I'll post a revised model.

 

Cool, one other thing. The arc idea to increase length is good as long as you wind up with a straight shot down the intake port in the head for the last several inches of the runner. I'm leaving for Panama City Beach for the weekend and may be offline. Hope to find some creative ideas when I'm able to return.

Regards, Michael

 

Ah, thats where I have the upper hand
I work in Tool & Die and have more 3/8 1/2 & 1.00 plate laying around along with Large chunks of Billet that are free for the taking
I have 2 chunks in my tool box right now that I could build 2 CNC valve covers with no problem.

When I saw the Intake from Nelsons Racing I was like I could build that and weld it togather with out a problem.
Now all I need is a blueprint to follow and I'll be all set, time to get back to the drawing board.

 

Well I can draw up a blueprint along with a 3-D model for you, I'd just need some measurements. How about in exchange for a set of intake flanges with a lifter valley cover?

 

I'll see??
I can't promise anything but if you want to make a print I will need the following:
Top view
Front view
Side view of each piece seperate and as an assembly.
I will need a center line of each port.
Distance from Front & Outside edge to each port.
Finish size of ports
Angle's
How much do you know about drafting?

I can't do the long runner LSx style, it would be more of a Mini Ram style.

But send me wat your thinking and I will look at it:
morepower2ya@comcast.net

This is where I work: http://www.paragondie.com/

 

Here is the revised LT1 port manifold design.



Obviously still just a rough mock up. The major problem I foresee is that it is actually 21" wide in the drawing. To make it shorter I will need to shorten the long runners considerably and run them from higher on the plenum with more arc then another bend back towards the ports (more then I wanted to do tonight). I'd also like to shorten the shorter runners a little.
I also have no idea how I want to do the merge from tube to rectangular ports, maybe it wont be for the LT1 after all.

Still, I think the design would work. It wouldn't give you much more torque down low (LT1 comparison) But I think the high revvs would benefit alot.

Jeremy

 

I can't seem to find that Nelson Intake you are talking about. Do you have a link to some pictures? I'd need some detailed measurements to draft a print or the manifold itself, unless you wanted to do it custom and just give me general dimensions with specific runner lengths/port sizes.

I wouldn't do the LS1 style, i'm not into those motors yet. Anything that would fit a standard SBC would work, maybe LT1.

I'm a fairly skilled draftsman, time is the only issue. I tend to stay pretty busy with work (mortgage broker) and this is really only a hobby. I could probably cut an LT1 intake up and use the flanges as a base, but billet would be much cooler.

Jeremy

 

4th vid down called project F-Bomb:
http://www.nelsonracingengines.com/vids.html
3500.00 Intake

This is the curent mag on sale now:
http://www.hotrod.com/toc/thismonth/

There are pics of motors with the Intake on in cluding the F-Bomb motor:
http://www.nelsonracingengines.com/motors.html

The Base and flanges you want are they going to mock the LT-1 Intake?
Get me some specks?

 

I have been thinking about the intake also.
Have you ever seen the Banks system for there Turbos, Twin intakes, one for each side of the motor.
Kind of like the Vipper V10 with twin TB's.
I have an Idea but I need to get my spare motor back so I can get some dimensions but it would be a double TB setup?

 

Yeah that's kind of what I'm going for with mine, just the long runners cross.

I'm not sure yet whether I should go with LT1 or SBC, but probably LT1. So the base and flanges will have to fit onto an LT1 block, no need for distributor hole, and obviously it will have to mate to the heads.

 

You should try using PVC Pipe to fab it with before you do a Alum fab job that way you get every thing right for way less money.

 

I'm not sure if i can get PVC that is flexible enough. I might just use cheap mild steel exhaust piping. My uncle owns an exhaust shop so I can use his pipe bender to get everything fit right.