Thread: VVL ITB throttle body setup

Just thought I would share something i will have finsihed over the weekend.

This is a individual throttle body setup for a sr16ve in a circuit car, Datsun 1200 coup.

GTi-R throttle bodies adapted to a standard intake flange and bellmouths for each cylinder.

To make it easy and as cheap as possible, I am just welding on a machined down VVL intake manifold, now flange, and drilling all the holes to make it a direct bolt on. There is a bit of mucking around with using the blanked off vacuum ports (those with the rubber ends over them in the pic) instead of the standard ones and then making space for bolt heads or a nut and washer for each stud but it seems to all be worth it.

Only bad part is the requirement for a change of injectors to the GTi-R 11mm oring hose tails...same as GTR and CA18.

This is just a teaser pic I took for the customer yesterday but it will be all done by the end of the weekend. I am limited to 150mm from the head to the firewall since the engine has been recessed to help with weight distribution. All in all, not really a hard conversion, just time consuming.



Excuse the the manifold in the background single cam RB30 job

Cheers,
Ariel

NOICE welds on the manifold in the background man. DId you make that one too? also Where are you located cause the cars you are talking about doesn't sound like something thats available here in the us.

thanks, yes, it is a custom design which supports in excess of 1200hp.

I am located in Australia.

ps - this is a very simple conversion for anyone interested. I am not really trying to advertise cause I dont expect to be shipping these from Australia, but I can give you a run down on how it all finsihes up so you can go ahead and do it yourself or outsource it.

thing is it will work with a turbo'd VVL since you could simply leave the complete GTi-R intake manifold...if it fits.

Very nice!

Will you be doing a before and after Dyno test to see your gains?

unfortunately not as the car requires this manifold to meet its class regulations, so tuning it with the standard manifold would be a waste of time.

The only thing changing is the runner length, but I will bre supplying him with different lengths and configurations depending on what kind of power they are chasiong or to suit a certain circuit. The port sizes (and luckily spacing) are eactly the same, so there are "minimal" differences to the factory issue parts.

the finished product - step by step.

Only problem is you need a standalone computer to run these since there is no airflow meter, must have a map sensor.

If you have any questions, please me know.















Enjoy

Ariel

Couldn't you just build a plenum around the ITB's and use a MAF?

Looks good btw.

Of course, not a problem. Just thinking for those that still want the bellmouths exposed.

I am not too sure how much space there is between the head and the firewall on the fwd cars, but maybe a plenum may be pushing the limits of the space available....that doesn't matter though as it can all be made to fit practically anything.