Will a none VVTi throttle body fit a VVti plenum?

[Chris Wilson]

Anyone know FOR SURE if the none VVTi cable operated throttle body will fit the VVTi (fly by wire) plenum? If someone could say if the plenums are the same part number, VVTi to none VVTi, that would answer it. Cheers.

[Alex]

Can't 100% help right now but the part no. on my VVT-i TB is 22030-46160 (8003)

HTH a little

[colsoop]

The part number on my pre facelift tt is 22030-46050

[Terry S]

What are you trying to do Chris? The VVTi can be a royal PITA

[Chris Wilson]

Motec want to `scope the fly by wire throttle signals before doing a software update for the fly by wire throttle, as you say, a PITA, was considering converting a VVTi engine to cable throttle. They are very cagey about FBW throttle software for obvious reasons.

[Terry S]

OK mate the only way I can check for sure is to try one. The FBW has some great uses, inc. knock prevention on the supra, would be a real shame to lose it. There are two TPS and I *think* Ian C did a small amount of logging on them to try and cure Alex's problems.

[dude]

The plenumis defo not the same Chris , of course that doesnt mean that the TB's wont swap ,allthough id hedge my bets on the answer being no !!!

Dude :devil:

[Chris Wilson]

Thanks everyone, it appears the actual throttle body castings are totally differnt, but either type will bolt ont to the plenum, although I haven't physically tried this, only done soem fairly accurate measurements of stud PCD's.

[Dragonball]

Have both at the workshop Chris - will try later

[Chris Wilson]

Thanks Mr. E

[VVTi]

Sorry to dig up an old thread, but did you ever find out if the Non VVTi throttle would fit a VVTi body?

I'm having issues with my eManage Ultimate atm, my tuners are wanting to trash the FBW throttle system on the VVTi.

I don't understand why it is an issue now though, as it was installed fine on stock injectors and stock turbos, but now that I have gone for a larger turbo (Garrett T04Z) and larger injectors (Sard 800cc's) the FBW seems to be tripping out...?

[Alex]

What's the problem? Does it close despite you having your foot to the floor?

[JustGav]

This is the same combo I have, and I've not had any major issues as such, some interesting ones regarding mapping, but nothing throttle related..

[VVTi]

It has gone into limp home mode. I suspect a possible solution is because I have not got the IJ adapter #2 installed, but the tuner is saying that it can add/trim fuel fine so it had no issues with that, just it is not satisfying the stock ecu, thus tripping out on the FBW.

Phoenix one: what sort of problems have you encountered? What your build looking like?

[Alex]

Well I wouldn't have done it without the IJ Adaptor #2...as I think you get some control but it's not quite right...

Do the datalogs show any wierd behaviour before the throttle trips out?

It trips out for a reason...even if it was just a calibration thing...have you still got the MAF in?

[VVTi]

I don't know if the did check the datalogs. I should ask them that. The maf is back in but it poses such a restriction. What I think they are planning is for the MAF and MAP to run side by side.

clamp the maf voltage at 3.75V then switch over to the MAP sensor to control fuelling. but the problem with this is the stock MAF is so small in diameter that I think its just going to be a massive restriction? Maybe twin MAF's or upgrade to a Z32 AFM if that's possible?

[Alex]

The EMU will allow you to run off of the MAP only...by generating voltages for your MAF pin, from the readings it gets form the MAP...it's possible but you'll need a virtually complete map of the voltages the MAF generates to progress.

I asked about the closing because the DriveBW throttle is extremely clever (wish I'd realised sooner) it partially closes the throttle if the ECU detects knock...until the knock has gone. If it's doing lots of this it *might* then trip out and go into limp home mode because it's seeing Knock too often....but that's a guess.

Mine used to go into limp mode before I put a single on it...and cleaning it didn't help...the only person to fix it has been Ewen...who replaced his Throttle Body.

[Mike B]

When mine detecks knock it reduces throttle by about 20%, but I think it's a very different system (all wired up via HKS). It's cautious until the engine has been through the rev range at least once in temperature, then works perfectly.
Send Terry S a pm, he did a lot of work on mine and knows more than most.