I have been looking into this for weeks, searching and searching and its about time i share my findings with this great community.

What all would be involved in swapping a VVL head onto a 54C block while retaining the ITB's?

1)The exhaust manifold would bolt right on.
2)The 54C head gasket could be retained if an external oil line where tapped and made for the VVL actuators.
3)The stock mapping could be used with a standalone solenoid actuator cause the MAF sensor would pickup the extra air flow at 4800rpm plus.
4)The VVL head would need to be machined for the larger 12mm head studs.
5)The stock pistons inside are deep dish and could handle the greater lift and duration of the VVL valves.

This all seems reasonable but how then can the stock ITB's be retained when they are meant for a high port GTiR head and the VVL head is a Low port. Ive seen a few posts where this was considered but never done. I called the sr20store and they tryed and gave up on a similiar project. An N15 manifold and throttle body would be the best option at this point but I'm not thrilled with the idea of losing the ITB's, which are such a trademark of technology and superiority on the Pulsar GTiR.
I have read that the ITB's won't even come close to bolting to a lowport but ive also read that all you need to do is drill out the holes and it slides right on. Its hard to imagine a fix this simple with 2 completely diff heads. So what all does it take to fit the ITB's to a lowport? Ive yet to see a CNC'ed adapter to mate the two and i have yet to see the ITB's actually ever fitted to a lowport head.


Please correct me if I'm wrong with anything i listed.
Lastly the search button is my best friend on this site. I have been able to modify and most importantly problem solve and maintain my JDM ride just because of the incredible amount of information found on this site. I hope this thread really adds to the database of info the sr20forum has to offer.

thanks guys

yea, exactly what i want to do, i need a vvl and i can have it done, at my machine shop(not mine but where i go to)

but damn it all to hell!, i need more funds for that, and i don't have it to spare.

Don't know the technical aspects of it, but this car looks like it has it:

http://jdmtyte.net/photos/Time%20Attack%20Pulsar%20GTI-R/resized/img_0016.jpg

http://jdmtyte.net/photos/Time%20Attack%20Pulsar%20GTI-R/resized/img_0013.jpg

http://jdmtyte.net/photos/Time%20Attack%20Pulsar%20GTI-R/resized/img_0008.jpg

I've been trying to get more info on this car, but my Japanese is too atrocious.

Thanks for the info, i've been wondering the same thing about using the itb's with the vvl head

Wow they did manage to keep the ITB's it appears in that pulsar. Is that an sr20vet? did any sr20ve's come with a coil on plug like that? What a pulsar ***

why can't you just make your own intake manifold and incorporate the itbs into the design. This way it will bolt to the vvl head, you will have the itbs and you can design it how you want. It may be a bit pricey at the end thou.

don't forget the dowel pins are different from the gti-r to the vvl motor, gti-r ones are larger

By dowel pins do you mean the 12mm head studs? And Buisnessman do you suggest making your own adapter to the ITB's? It would be awesome if you could build it with the same material those thermo spacers are made from. Like make a mold and use the same polyurethane from a caulk tube you used for your engine mounts. It would be a good velocity stack with rough walls to promote turbulence into the combustion chamber. Eh?

I don't think that polyurethane stuff in the tube would work to well. I'll more then likely talk to a shop about making something sometime in winter.

Yea i definitly take that back, Dumb. But If you do get a cnc'ed spacer made you should use thermospacers in between it while its apart and powdercoat the manifold. I bet that would be worth a few more consistant ponies.

I haven't looked at a vvl head head to know what the difference is for mounting the throttle bodies but a spacer might not work to well or atleast for me. I have very little room left between the gtir intake manifold and the firewall so it would need to be thin and depending on how much difference there is it wouldn't work well. I really don't know at the moment but hopefully this winter I can look into it a bit.

Up garage in WA bossted a VVL motor and put in it there GTIR