what is that you’re putting over your intake filter? Rubber material of some sort? How do you secure the material ?

 

I played around with my car a little last week and figured I'd share some results in case anyone was interested. I had a spare manifold laying around so I did some minor blending in the upper from misalignment in the manufacturing process and port matched it to the lower as well as cleaning up the casting of the lower and reduced the bump around the injectors. Overall not anything big and I wasn't expecting much but without doing A-B-A testing it appears to have gained me about a 1.5% improvement in measured maf values up top. I'm sure more aggressive porting is an option but for the effort I'll take the ~4hp improvement. Mostly what I learned is that my intake ports and valves are far dirtier than I expected, I have the means, I think I'll walnut blast and clean them in the near future.

 

I decided to revisit an old idea and have decided to try to manufacture a performance oriented manifold. This is what I have so far, I am trying to design this around actually being produced with specific design elements in mind. I feel like I am getting close to a finished product, I might have a more finalized model within a week. Obviously it will need a new intake tube and maybe custom air box to mate with in the engine bay.

 

That's nice! Would you be about to help others get one also? What do you think the cost would be about? That would really make some nice gains.

Also is that just the Upper? Or is that a Upper and lower in 1 piece?

 

Looks interesting, please keep us posted, if it makes some real results I'd love to buy one off of you. Any chance you plan on making it compatible with the 76mm Tundra throttle body? Well not really compatible, moreso "tuned" for it?

 

I want to make sure everything is properly made with good fit and finish as well as verifying if there are gains before offering it to others. I would consider making a batch to sell to others, I don't know what the price would be. My cost as of now its looking like ~$150-$200 in raw material, and a few thousand so far in developing the ability to manufacture these. This manifold is 3 pieces, a lower which includes the runners and bottom half of the plenum, a velocity stack section, and the plenum lid. Nothing from the oem manifold is reused outside of the throttle body.

The current plenum lid has mounting accommodations for stock and 76mm throttle bodies. I am going to make a tapered insert for keeping the stock throttle body. Currently the "tuning" of this manifold will revolve around swappable inserts to change the runner length to target different RPM ranges. Unfortunately it doesn't look like I will be able to get an ideal length for staying within the stock rev limit so it wont likely be an improvement without a tune. I have to get around to seeing what kind of hood clearance exists after the hood liner is removed to see what can be done.

 

I see, one last thing, you talked about creating a better airbox, are you also planning on creating a better intake for that airbox? By intake I mean that little scoop at the very front by the hood latch. I've always wondered if it could be recreated to be more optimized and performance oriented.