1zz Tb on a blitz supercharger ... Any good ?

[vten]

Reading the manifold thread , most ppl added the 1zz TB .... I was wondering If I should add the 1zz th for my fixed pulled blitz supercharger ....

Any thought ?

Thanks guys

[tooter]

Hey vten,

In my opinion, you'd have throttle response up the ass.
Even running non aspirated...


...I can cruise down the freeway at 65 with just my big toe resting on the gas pedal. Your forced induction could only multiply that advantage even more. The real question is... how big is the bore on your Blitz? a 1ZZ is 55mm.

Greg

[vten]

I have no idea on the blitz bore .... But I'll find out :)

[CrankyOldMan]

Good question. I don't know that it would make much of a difference in output (without a standalone ECU) but it would certainly improve pedal response.

[vten]

Hmmm yeah ..... Since I have it tuned with the AEM FIC, do you think re-tune would be needed ?

[CrankyOldMan]

That's tough to say. If you have an AFR gauge and it's showing lean at WOT, then I would recommend a re-tune.

[CrankyOldMan]

Ok, having looked at the mating interface between the Blitz and the TB, I don't think that you would get much out of a 1ZZ throttle body. Reason being, the inlet on the Blitz is sized to the 1NZ, so you'd have a nasty step down in diameter and likely have issues holding the gasket in place. If you know someone with welding skills that could do a cast-to-plate joint, you could make your own adapter. Maybe.

[tooter]

Can you post a pic of your inlet, Cranky? What about simply grinding out the bore to a larger diameter? Then the only issue would be making a gasket for the 1ZZ throttle body. I had a 2mm step on mine and just took a Dremel to it to make it work by rounding off the sharp edge.

[CrankyOldMan]

It looks pretty much identical to the one you posted, but with the 1NZ gasket channel.

[tooter]

Originally Posted by CrankyOldMan

It looks pretty much identical to the one you posted, but with the 1NZ gasket channel.

Yes, it does...
The difference is that this one matches the 51mm bore of the 1ZZ manifold all the way through while the other one tapered out from the 46mm 1NZ bore to match the 51mm.

When Toyota went from the Corolla 3 bolt throttle body to the 4 bolt, they also increased the bore diameter from 51mm to 55mm, so there was a 2mm step around the edges which got smoothed out with a grinder.

[Astroman]

I my 1zz TB. Just need a supercharger to go with it.

[47_MasoN_47]

I'd be interested in this. It would be nice to have a better throttle response.

[CrankyOldMan]

Finally spent some time with the Blitz, the 1ZZ throttle body corpse and a camera today.



My suspicions were confirmed: the intake flange is only sized for the 1NZ throttle body. There's an awful nasty step and potentially exposure of the gasket itself.



There isn't really room to modify the existing flange, because it's only about 1/2" thick.



The casting is also very thin, and not very smooth inside.

[47_MasoN_47]

That's unfortunate.

[tooter]

Originally Posted by CrankyOldMan

Finally spent some time with the Blitz, the 1ZZ throttle body corpse and a camera today.



My suspicions were confirmed: the intake flange is only sized for the 1NZ throttle body. There's an awful nasty step and potentially exposure of the gasket itself.

Yeah, I had that same issue with the very first prototype adaptor.

You could still make an adaptor plate that smoothly reduces to the stock diameter. You already have the perfect pattern. It's on the bottom of your 1ZZ throttle body.

I'd just drill 4 slightly larger non threaded holes 60mm square in some aluminium plate and get some longer throttle body studs to hold everything together and use a stock O ring gasket under the adaptor. You could then make a stock diameter bore hole in the center of the adaptor to fit your supercharger, and then file or Dremel it to flare out to the larger 1ZZ diameter at the top. You'd need to cut out a flat gasket for the throttle body to get around needing to groove it for an O ring, but it wouldn't be all that difficult to do.

Remember, this isn't just the engine passively pulling in air. It's the supercharger pumping it in. And ok, so there will be a slightly higher manifold vacuum in front of the supercharger, it would still be the larger throttle body that's metering the air.

[CrankyOldMan]

Originally Posted by tooter

You could still make an adaptor plate that smoothly reduces to the stock diameter. You already have the perfect pattern. It's on the bottom of your 1ZZ throttle body.

That would be the next logical step, but I was thinking from the "bolt-on" side of the garage. Not everyone has access to the facilities that we do. =)

A few alternatives (of varying feasibility) would be: buy a 50mm throttle body spacer and turn/grind the taper; scavenge the intake side of an xB kit and use the tooter TB flange; scavenge the intake side of an xB kit and make your own elbow/flange; learn to do lost-wax investment casting and make your own; etc. etc.

[47_MasoN_47]

Originally Posted by CrankyOldMan

That would be the next logical step, but I was thinking from the "bolt-on" side of the garage. Not everyone has access to the facilities that we do. =)

Thanks for that :) I don't have the tooling to do much more than open the box and bolt parts on. If it requires milling/lathing/etc. I'm just SOL.

[vten]

If possible, cranky or tooter , are you guys mind to make the adapter from the blitz to the 1zz tb ?