gutted upper intake?

[RednBlack]

1 is really not that hard to machine and put overhead. Cables fit. May have to splice some wires. 2 TBs? May have computer issues. Ask sappy. Personally, I can't see a down side for mounting a TB on top of a can plenum yet. I'm going with Daves original thought here. And some old school. Mounting the TB on top of the can, 90 deg. mandrel bent intake. Remember, because of clearance, this may be a little high off the hood. I am seeing close to 6". Needs to be 8" wide. MAF. Could twist and do cowl induction. Just a thought.

[dykz34]

You will lose ALL lowend if you gut that thing as much as you are planning.

[Dave]

remember, I'm a 92 Z-34, not MAF on there.

.. welp, I'm planning on taking all the material I can out of the inside of it, yes, I will leave the gasket surfaces there, with enough metal to keep them from breaking off and becoming part of my exhaust system - anyhow - I want to actually see what's going to happen. I know the air to the back cylinders (#'s 5&6) will get the air faster, but I don't think at WOT that's going to make a whole lot of difference, at least not in the upper RPM's, but we'll see - however, I am going to tweek and change things as I go along. the TB ideas are really good ones, I was thinking that since I have this crappy NON Z-34 hood on the car, cutting it won't brake my heart, and I could fassion up some crappy rice looking hood to make an effective "ram air" type thing - MMMMmmm ram air - effective only on the highway (Doh!) - still I want a Force Fed Z-34 but for now I'll go this route as $$ always plays an issue, so I guess I'm gonna have to use speed for my charger for now. perhaps like one-of-a-kind-cutty on w-body.com I can get a couple 190,000+ computer cooling fans that run on 12v and tell everyone I get 3.2 lbs of boost. but seriously, I'm getting the car dyno'd next thursday (fingers crossed) and I'll have the STOCK numbers posted for everyone at that time - mind you, the only performance thing about my car is the upgraded prom (BHAK I think, stock program, but it's newer) and the lack of a catalytic converter.

all these Ideas, keep 'em pouring in, they're all awesome!

Twin TB's does sound awesome, the big V-10's and V-8's have 'em, I think it's time for the V-6 guys to get in on the deal LOL - but seriously, it's an idea I can try, something like a sequential TB idea much like the Vacuum secondaries on the a lot of carb's ...

if I had my own lathe and metal, and time, and such, I think I'd be able to get a lot of these things done much faster, but as it is, I think I should have a lot of these things posted by mid - to - end of June.


wow I shouldn't be writing at 5:49am with no sleep...

--Dave.

[RednBlack]

dykz, I know you know why the bottom end will drop out. Are you going to tell us? If this is really a worthless venture, I will pursue it no further. However, the thought of a center mounted TB on an empty can does tickle the mind. Next we will work on 6 TBs and velocity stacks!

[4spdz34]

dykz, I know you know why the bottom end will drop out. Are you going to tell us? If this is really a worthless venture, I will pursue it no further. However, the thought of a center mounted TB on an empty can does tickle the mind. Next we will work on 6 TBs and velocity stacks!

long runners promote torque short runners promote hp. its simple u are gutting 15 inchs of runner at least

[dykz34]

Exactly what he said. If you have no runners, or VERY SHORT ones.... the gains will be crazy up top. Probably out of our use in the powerband though (think 8000 rpms)

[Dave]

welp, it's still something to expirement with, I mean, there's still a chance that the vlave-pulses (the whole reason for longer runners) will increase the ability for the engine to flow - I know in a lot of the other DOHC applications I've worked with, shorter runners often show results all over the place.

--Dave.

[dykz34]

It certainly is worth a shot... especially when you will only be out $1.

PS: I had a gutted intake on my Z for a while... it killed lowend. I actually ran a half second slower at the track with it. (That was with only 1.5" taken outta the runners) I believe that it gained 5hp, and lost 10tq. It's up to you!

[Dave]

welp, I Think this is gonna be an interesting expirement - that's for sure.

--Dave.

[4spdz34]

what i think would be cool is if u could keep the same runner lengths and add some plenum volume. maybe even shorten the runner lengths and put a solenoid in the plenum some how so that at low rpm it will take up volume and at high rpm it will give u more volume. sounds a lil tricky but it could be worth it. maybe i will try something like this, i no longer have a 3.4 so now i have lots of time on my hands and a few spare parts. lol

[Dave]

I was thinking about that, something like they use in the Lincoln's 4.6 DOHC V-8's, long runners for low RPM's and short runners for High RPM's, some kinda of butterfly system that'd allow it to switch perhaps, that's certinally take some engineering, but I think I may* be able to make something to work, I know they also did it with the Toyota (yamaha) engines in the Celica's, and MR2's as well. (not sure where else they used that engine)

I still think a vacuum secondary TB would be a good thing, sounds almost fun to expirement with.

--Dave

[Gemmer]

Twin TB's does sound awesome, the big V-10's and V-8's have 'em, I think it's time for the V-6 guys to get in on the deal LOL - but seriously, it's an idea I can try, something like a sequential TB idea much like the Vacuum secondaries on the a lot of carb's ...

Ferrari's V6's are dual intake

[Dave]

... I stand corrected.

--Dave

[4spdz34]

so is the chrysler 3.5

[blk92z34getrag]

Well the two TBs wouldn't necessarily have to be actually seperate, you could use one long oval throttle plate, and split it like ( | ) so... technically it'd be one TB, but two intake paths. Has anyone seen the TB they use on the Mercury Marauder? Split like that. Two smaller diameter paths are better than one large diameter path. Then who knows how you could play with the runner.

I have all kinds of beautiful images of this setup in my head right now... or maybe that's the 4 hours of sleep 3 night sin a row talking...