Thread: gtir or de?

ben hit it on the head ITBs are not needed and can be a bitch to get them correcty

all good info.....im still confused on why people think the throttle boddies are "hard to tune"> not being a smartass, seriously it seems like a very simple, well designed itb setup. each throttle boddy has it own vacume port, for tuning, and an easy to get to butterfly adjustment. seems to me on a maf car it wouldnt matter all that much anyways. As for the ring land....hell, i have no idea. i havent taken it apart. basically, injector seems to have gotten stuck open, and washed out the rings. compression is pretty low on the one cyl. its a weird one. doesnt smoke HORRIBLY unless you really get down on it. driving it around town.....nothing. but, my main concern now is the arp studs.....i was looking forward to putting those in, so maybe its not the best idea? ill have to look into all that.

As far as I know, I have no advised one way or another on the subject. I'm merely trying to give him the info. He seems smart enough to make up his own mind.

I come from the land of MAP sensors (and don't run a MAF on my SR20), so tuning for ITBs is a different process I'm not fully familiar with. Not many others are either. That's my only real gripe with them.


Keep in mind the GTi-R block used thicker head studs than all the others. I think they use 12mm studs and all the others use 11mm so keep that in mind when purchasing.

yeah, i was pretty sure about the bigger head studs.....seemed like a plus to me. i need to find something to throw in this car while i rebuild the gtir i guess. too nice a car not to drive.

If this is a GTi-R chassis with AWD transmission, be aware that you need a narrow block SR20 from another AWD vehicle (AWD bluebird comes to mind) to swap in if you plan on doing that. A typical FWD SR20 will not fit from what I've been told. The narrow block makes room for the AWD components.

See this thread for more info: http://www.sr20-forum.com/gtir/21856-what-blocks.html

run the arps i know a lot of people that are succesful with them.

sadly, this is only a nx2000, fwd. its a lot easier to work on the narrow turbo blocks.....ive noticed its much easier to work around the manifolds, to get near the oil filter and the power steering pump. another quick question, im going to just assume someone reading this will know....i have a standard top feed fuel rail for a sr20.....can i in ANY WAY make the gtir injectors work, say if i go with a de, and want to run gtir injectors in the de for a little while? i guess i could pull one and look, but im feeling lazy. i heard the gtir top feed injectors had a diffrent inlet side than regular mds style injectors.

i do have a much bigger setup than the stock gtir stuff, im just trying to play with stock stuff for a little bit.

The GTi-R top feed injectors are low impedance (not bad in and of itself, but another annoying thing about that engine because of availability) do to get them to work with a regular ECU you need to add power resistors to them.

the itbs aren't a problem on the gtir when going to a map sensor, you just run a vacuam from each one to a common chamber and run that to the map sensor.

for info, the ports on the itbs as standard are there to balance the throttles, you can end up with all kinds of wierd problems if you mess about with the throttles and dont get them set back up right. A set i rebuilt once made a car go completely crazy, i thought the owner was going to cry..lol. i'd messed up one of the adjustments on the linkage arm when i put them back togther, the revs were hunting up and down, brakes didn't work very well as there was no vacuam, the guy looked most upset..lol only took about 10seconds to sort and he left a happy bunny but you should've seen his face.

the gtir is undoubtly the best of the de's, although i am slightly biased