Every multi blower unit Ive seen has either had the intake piping off to a side or in between the blowers. Makes packaging a bit more of a challenge

Anyone ever tried sending it thru the massive space inside the pressurized intake area? Sealed off of course

Pics

Good ideer or not let me know what you think

These are Eaton M90's common on bonnevilles and such

 

one little issue with your drawings, right now all they will do is stir the air up. you need to have the inlets off the back connected to the throttle body not the plenum. The setup seems viable other than that, and the large plenum would provide enough room for a nice intercooler.

 

I think he means that the outlets of the superchargers go into the intake, into another chamber and to the ports, which is sealed off from the part in which the air comes in through the TB and into the backs of the M90s. If you have the fab skills, I say go for it. How about a massive intake to a big 'ol TB, then a branch to each M90 instead of routing it through the intake? That way your also not adding heat to the air before it is compressed, creating even more heat.

I like the modeling, what did you use...looks like a lot of work.

 

Cross section to show the ideer a lil better

The extra heat I never thought about

Its AutoCAD 2002
Bout 3 hours

 

Believe it or not . Last year there was a Black197?? Corvette with the exact same setup being sold at Barret Jackson's. He claimed 1000 hp on the block.

 

'74 1200hp He uses twin TB's aimed at the windshield just inside the cowl

http://www.lateral-g.org/distad/

The ideer I was pushing was a compact setup that didnt have a maze of tubing or sprawling all over the engine bay retaining the front TB(s) since most engine bays simply dont have room for a rear induction

Example of sprawling is this T-bird. Again has the twin rear mounted TB's

I like the criticisms keep em commin

 

Eh, not a big fan of multi-blower setups. More complication for unknown gains. Blowers aren't like turbos- there's no issue of spool-up time since it's mechanically linked to the engine crankshaft. One bigger blower would be simpler than 2 little ones and get the same thing accomplished, unlike a turbo where 2 little ones can work better than one big one and the added complexity might be worth it.

 

Packaging, packaging, packaging, thats all this whole concept is for

Yes one big blower can do the same work as 2 smaller ones but the fact that its BIG is the part Im trying to get around

I redid the intake because I completely forgot the fuel rails and clearancing is tight but its several inches taller
I also realigned the ducting inside the pressurized box to account for the stock 16.4" nose to rear length of the M90's

Intake ports now being directly under the blower openings made the individual port ducts impossible without some sort of crossovers that I couldnt find room for
The result was ducting to port pairs: 1,3 2,4 5,7 6,8

The final dimensions for this setup are:
12.45" from the block deck to the top part of the blowers
16.71" outside to outside of the blowers
1.75" block deck to centerline of the throttle body (very low)

Problems I cant really figure out:
Since there is such a long distance behind the TB and before the blowers, how well will the TB act at controlling the air
There is 388.5 ci between the TB and the inlets on the blowers
How signifigant will the heatsoak be on efficiency with the cold air part so close to the engine

Here is a pic of the new design and a map showing the air travel

 

Another problem I see, now that you state that the right and left banks are seperated, is that what if the efficiency of each blower is not exactly the same? You are going to have different pressures/temps in each bank.

Keep it up though, you've done a good job so far as far as design, keep working out the bugs.

 

Having played with these blowers I’d say that there’s a bit of wishful thinking in your design.

To start with, comments about Mike’s “sprawling” T-bird setup… the big box in the middle is there to house an intercooler, and the blowers are set to the sides so that he can pretend that _somehow_ he’s going to put a hood over the whole thing. He had some issues that I don’t believe that he ever worked out to his satisfaction, for example, I don’t think that he ever got belt slip under control as much as he wanted to, and was never happy with the TB setup, he borrowed a couple from my brother to try running them into the cowl like my brother’s M90 intake runs on his LTD, but I think he sold the setup before messing with that.

WRT to your specific design, what is it going to go into? IRL there won’t be room to run the intake to TB like you have it unless you eliminate the distributor, and the only way that you’re going to get that assembly that narrow not to cover the valve covers on a small block is if they are on their sides and everything is stacked straight on top of itself (for example, the fuel rails would have to be totally under the blowers…) and then there is no hood, not even like a 4” cowl on a full size truck, that will cover that assembly.

If you’re really going to push this setup hard then you’ll need probably about 1400cfm or more of TB, which you have no good way of packaging like you have this setup, and no way do you want to do this without some common plenum between the blowers and the engine.

To be honest, the whole design doesn’t make any sense to me. If you have the equipment to make what you’re drawing, then you have the equipment to make custom drive snouts for them and at that point stacking everything like you have it becomes a big waste of time.

Check out this G35 setup that I installed:


Do you see how the drive belt goes down into the valley and is driven by a jack shaft (you can see part of that assembly bolted through the front dress of the motor in that pic, it’s the black anodized piece mounted I the timing cover assembly below the coolant crossover). BTW, that's an M62 and it looks to be a lot bigger then the space you're leaving in your drawings for the M90s

If it was me… I’d think something of a cross between that and the setup that they use with the magnussen LSx and small block setups. Flip the blowers around, machine a new front housing/gear case/snout that is one piece and holds both blower cases, driving both with one assembly through a jack shaft mounted between the 2. that will give you the most compact packaging, the most flexibility with the belt drive, leave room for a distributor, solve the TB issue (mount 2 cheap, smaller throttle bodies on the back of the blower housings at the _front_ of the engine… Details like the upper cooling passages and the injector/rail mounting would depend mostly on the chassis that I intended to, I’d personally mount 8 injectors right down the middle of the assembly with a single rail, UNLESS I decided to intercool it.