3 litre wolf efi crankcase injected 3 litre build

[Dave Strong]

ronnie(or someone who knows math,lol) i came up w/ the area of the factory 300x butterfly(diameter=3.49) is 9.566. the area of the etec intake-each butterfly is 2.20, area is 3.8, multiply by 3(3 butterflies) is 11.4. is my math correct or am i wrong?

Math seem right, having 3 butterfly's could make for higher intake speeds and even the flo between cyl's. Cool stuff keep it comming.
Know what your saying with the overtorqued knok sensor thing as well. When I was a drivability tech at GM found most of the time when removing knock sensors that had been in an engine for any length of time they would fail if reinstalled. Due to the torque needed to break them free due to the loctite sealer. Even though the wiring for them are shielded one has to be careful with wire routing also. Keep away from plugwires, alternators, etc.

Dave

[mrcrsr]

thanks dave! a lil rusty w/ math

[Dave Strong]

thanks dave! a lil rusty w/ math

Kind of a cool intake. 2 things, 1 ugly throtle valve entry, need a velocity stacks to smooth out airflow. 2 if bolted to reed plate no much of a plenum making it similar to SVS style still may have a couple cyl's with poor signal. Maybe a spacer with Merc. bolt pattern on reed side and Yami on intake side? Not real up on the 3.0l stuff but kinda what I see.

Dave

[Stitch King]

Charlie,

If what you are after is CFM, you need to keep in mind that with more holes you have adding up to a given area, the more wall area you've got, so the lower it'll flow. It's not really a direct comparison.

I'm pretty sure the guys that did the math and came up with the hole size as optimal for the 250 hp engine it was on and not one that's in the mid 300's like yours.

Ken

[Stitch King]

Are you trying to balance out your airflow or get more air in?

[mrcrsr]

trying to balance the airflow to all the cylinders, i was thinking the same thing w/ the plenum area,i could use an extra 3 litre reedplate that is 1/2" thick, weld it to that intake and mill off the exsisting flange to get the bolt pattern correct. i agree the entry sux but some of that could be fixed in the mill, and if need be velocity stacks made. i agree as well, i know these throttle bodies have more wall area, but the overall area is larger so how does it balance out? and wonder how the flow would stack up compared to the horn intake. maybe i'm better off starting w/ a box(of sorts) w/ 2 larger automotive throttle bodies bolted to it?

[Dave Strong]

I was thinking more a 1" spacer but the only way to know is try. I like the 3 throtle valve over the 2. Bet you wish you had a flow bench LOL.


Dave

[Stitch King]

Charlie,

I think one throttle body would be enough. Keep in mind that on an LS3 the throttle body is 90 MM and it's supporting 436 BHP. Depending on where you read the 90mm TB will flow over 1000 CFM so I think if you used the 300x style throttle body at 88 mm you'd be in good shape as long as it flows as cleanly as the Chevy LS one does.

If you want real airflow, you should try this....

[Stitch King]

I've got a plastic intake that you can chop open and get some plenum ideas from. I'll leave it at the house tomorrow.

Ken

[mrcrsr]

the biggest issue i see is trying to even out the flow to all the cylinders, rite now w/ the horn i see differences, it mite be fixable w/ the addition of plenum volume but i'm out of space in the cowling because the horn has such a large inlet/velocity stack that is part of the casting. the 3 butterfly deal seems like a good way to go, just not sure of flow though if i'm losing anything. the total area of the butterflies is larger though.

[baja200merk]

Charlie,

If what you are after is CFM, you need to keep in mind that with more holes you have adding up to a given area, the more wall area you've got, so the lower it'll flow. It's not really a direct comparison.

I'm pretty sure the guys that did the math and came up with the hole size as optimal for the 250 hp engine it was on and not one that's in the mid 300's like yours.

Ken

The 300 etec has the same plenum and the guys turning the 3.4 etecs 7500 use the stock plenum. Doubt CFM will be an issue.

I can bring my buddy Matt an e-tec plenum and see if he can put it on the flow bench if that helps.

[Stitch King]

Baja,

Have him flow a merc throttle body too for comparison.

Charlie,

You might be surprised at how the laws of physics (particularly fluid dynamics) limits the 3 hole (compared to the large single) because of friction losses on the walls of all of the three holes.

I'm not saying it won't work but it may not be optimal either. You've gone to far to settle for less than optimal.

Ken

[rchevelle71]

Baja,

Have him flow a merc throttle body too for comparison.

Charlie,

You might be surprised at how the laws of physics (particularly fluid dynamics) limits the 3 hole (compared to the large single) because of friction losses on the walls of all of the three holes.

I'm not saying it won't work but it may not be optimal either. You've gone to far to settle for less than optimal.

Ken

YUP,

learned about all that stuff in firefightin' school way back.

[mrcrsr]

the 3 litre reed plate i have measures .675 thick, so it is a lil larger the 1/2", the etec plenum is pretty darn close in size to the 3 litre so it won't take much blending work. need to come up w/ a method to make the velocity stacks. anyone have any pics of an etec plenum installed so we can see the throttle linkage/tps?

[baja200merk]

Does this help?