[Mk2] [Generic] vvti head marriage possible to rev3?

[CRTwo]

hi all just wondering if there is any mechanical reason why the vvti head will not fit the rev3 bottom end............i.e. the vein won't line up

are both vvti cam's phase controlled or just the inlet?

is it a cam changing vvti or a cam phasing vvti?

thanks chris

[CRTwo]

so no-one knows?

[LimeyMk1]

I'd consider buying a cheap head gasket from each engine (VVTi & rev3) and see if they match up.

VVTi is Variable Valve Timing with inteligence IIRC and is on the inlet cam only. It's controlled via a PWM (Pulse Width Modulated) oil valve which adjusts the cam from no overlap to about 60 degrees advanced.

You'll probably need to fit the VVTi crank sensor and run the VVTi ECU or a standalone.

Is this for the 2ZZ head from the Celica 190 or BEAMS VVTi?

[Rogue]

Our research indicates that you can install a BEAMS head on a rev 3 block. I assume you're thinking of topping and tailing since you'll need the corresponding crank sensor? You'll have to work out some way to supply pressurised oil to the VVT mechanism since the gallery won't be present in the rev 3 block.

Some modification will be required.

[CRTwo]

it's for a 3s-ge rev3 don't believe it'll have a 2zz head?

the head gasket's not a bad idea i know a chap in my local part's shop i'll ask nicely and he might get 2 out for me to look at if they're in stock i realise the oil will need to be supplied presuming it work's on a fixed pressure, possibly try to take a feed from the tensioner system? i've been told it's hydraulic on later model's but i presume it runs from engine oil pressure somehow? although to be honest i haven't looked at my rev3 and the rev1 was spring tensioned.

I presume the crank sensor is different as i presume the ecu use's it to distinguish when to use the vvt-i, i hear of the nissan boys who do this to their sr20's, they often use an aftermarket system to contol the vvt, has anyone heard of anything similar?

has anyone ever done this conversion to anyone's knowledge? or are we pioneering here

thank's chris

[RST]

Have a browse on the BEAMS owners group section on www.mr2.com . All the BEAMS info is on there -there's loads of info on these, good place to start for ideas

[Protok]

I had a few headgaskets in my hands last week whilst I was trying to figure out a way to decrease compression in the future.
Rev3 seems to match up to the Beams one nearly perfectly.

[CRTwo]

thank's i've heard the 'red top' (single vvti presumably the same as the beam's) will fit the rev 3, i've also been told the black top will fit the red top so i'm guessing the black top will fit the rev3, i think i'll have to get hold of a black top head gasket to compare.

lower compression, the only thing i can think of and i can't say i can proove this as i haven't seen it but i've been informed that there are different piston's in different revolution's, flat crowned piston's and curved crowned piston's the flat piston's are a lower ration as standard, but as i say i have no evidence to back this up, no use if you have aftermarkets piston's though lol. hope that's of some use if it's true.

thanks all who replied and thanks in advance for any more replies