Time to go Stage II!
- Thread starter Alky V6
- Start date
Leave yourself some room to do the final port match after all welding and final flange to head machining are finished. When you set up to weld the final assembly together , set it up so that the ports are all higher than the ports in the heads. The manifold will warp quite a bit and this will allow you to mill the flanges to an exact fit to the heads. Love your post here ,and wish I still had your energy and time!!! Mike
Hah! I know what you mean. What did I get myself into?
The intake is going to be a bolt together. A little more refined than the Stage I intake, but following the same idea. The runners will bolt to the flanges, so I won't have to worry about any final machining or port matching due to any warpage from any welding involving the flanges. The Stage II head layout makes the bolt together concept extremely easy to accomplish. There's tons of room.
Even the lifter valley cover will be bolted to the flanges so that the cover becomes a stressed member to help the block out. Final fitting of the lifter valley cover won't occur until the heads and intake flanges have been properly torqued into place.
O-rings will be used to seal the runners to the intake flanges and the plenum.
It'll be over 8,000 being destroked and with fewer cubes. I'm figuring around 8,700. At about the natural frequency of the present driveshaft.
Alky V6 said:It'll be over 8,000 being destroked and with fewer cubes. I'm figuring around 8,700. About the natural frequency of the present driveshaft.
At least the driveshaft speed is more relative to mph at the top of 3rd. If you need it it will be a relatively cheap investment at this point.
Agreed. I'm going to wait and see what the car wants. If traction becomes an issue, even on a good track, then I'll be doing some major chassis work, which will most likely mean a different driveshaft dimension. Only want to buy a driveshaft like that once.
I have an interesting problem with the runners. The sim is showing that an intake runner length of 2.0" would work extremely well for peak hp, sacrificing a little low end.
The stack up looks like this. The intake flanges are already 3/4" thick. The plenum wall thickness will be 1/8" thick, and the runner entrance plate with its radiused entrance will be 1/2" thick. That leaves the runners being 5/8" thick?
The runners themselves are going to be very short suckers. This is going to be interesting.
I think the bolts will be going clear through the complete stack up, just like the Stage I manifold.
And, I still have to mount per runner, 2 electronic injectors, one mechanical nozzle, one nitrous nozzle, and one cold start priming nozzle. What a cluster fandango. This is going to take some creative imagination.
The stack up looks like this. The intake flanges are already 3/4" thick. The plenum wall thickness will be 1/8" thick, and the runner entrance plate with its radiused entrance will be 1/2" thick. That leaves the runners being 5/8" thick?
The runners themselves are going to be very short suckers. This is going to be interesting.
I think the bolts will be going clear through the complete stack up, just like the Stage I manifold.
And, I still have to mount per runner, 2 electronic injectors, one mechanical nozzle, one nitrous nozzle, and one cold start priming nozzle.
What a cluster fandango. This is going to take some creative imagination.
turbobitt
Well-Known Member
- Joined
- Feb 14, 2002
I have an interesting problem with the runners. The sim is showing that an intake runner length of 2.0" would work extremely well for peak hp, sacrificing a little low end.
The stack up looks like this. The intake flanges are already 3/4" thick. The plenum wall thickness will be 1/8" thick, and the runner entrance plate with its radiused entrance will be 1/2" thick. That leaves the runners being 5/8" thick?
The runners themselves are going to be very short suckers. This is going to be interesting.
I think the bolts will be going clear through the complete stack up, just like the Stage I manifold.
And, I still have to mount per runner, 2 electronic injectors, one mechanical nozzle, one nitrous nozzle, and one cold start priming nozzle.
Mechanical injector and Nitrous nozzle could probably run in the interior ?
I am also surprised at the 2" runner length. Using the simulator, I would think that you can reach another more optimum length for fabrication.
Looking at big inch super stock Hemis making about 1000 HP normally asperated, they have very long runners that cross over each other to take advantage of manifold tunning. Since you are big on this concept, I would think that there would be several lengths that could be used that would yield the same results.
Allan G.
I've tried different lengths. As soon as I add just one inch, peak hp begins to drop. Especially with that first one inch. Almost a 100 hp drop.
For sure, the mechanical nozzles will be interior. Primers will be mounted to the roof of the plenum.
I'm thinking with the nitrous nozzles, on the left side long wall of each runner, looking at the runner from the sides of the engine. One E injector at the traditional location, and the other E injector on the opposite side of the runner, under the plenum. With the way the runners will be angled, there will be tons of room under the plenum.
turbobitt
Well-Known Member
- Joined
- Feb 14, 2002
When working with tunned runners, I would think that you would need to double or tripple the length to get you back to the same optimum fequency. 1 inch may start dropping power but there should be a point where it starts to pick up again ??
Allan G.
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