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Author:  dominator [ Wed Sep 21, 2011 1:35 pm ]
Post subject:  itbs

iv just started an itb setup on the gti, its the last major mod im doing to the engine as iv done every thing i want, p+p/ big valve head, 75.5mm 12-1 comp ratio pistons, tighe 952 cams (suposed to be grp a grind)
just finished the inlet, its very simple, if the flange was cut right to start with, i would`v had to do no welding at all
just gathering info on the subject atm, like what i need etc
as i will be using a modified o/e fuel rail the only thing im realy stuck on is the injectors
what cc are std gti injectors, iv read a few threads on the subject some say 220cc some 250
if they are 220 then they will be maxing out at 170ish hp which is quite close to my hopefully expected output wth the itbs, its making 160 atf with the grpa cams atm
iv been looking into injectors for other cars, iv been told of a few injectors that might fit but some of them are weaker than swift gti`s, even thoughthey are in a bigger cc more powerfull engine
what cc are cultus injectors?
can anyone shed some light on the matter?


Author:  strider [ Wed Sep 21, 2011 1:53 pm ]
Post subject:  Re: itbs

the itb looking good !

std swift injectors flow aprox 260cc at 55psi, the cultus injectors flow approx 330cc at 55psi

Author:  dominator [ Wed Sep 21, 2011 2:19 pm ]
Post subject:  Re: itbs

cheers mate, i am going to strip them down, clean and paint them in the same colour as my cam cover/cultus intake
if they are defo 260 cc then i guess iv got nothing to worry about
also undecided about making a large plenum or just using filter socks for the itbs


Author:  G-sus [ Wed Sep 21, 2011 5:31 pm ]
Post subject:  Re: itbs

Nice setup, very clean. I'm planning to do ITB's on my 1.6 16v, but I'm a little low on budget atm.

Author:  MF89 [ Tue Nov 01, 2011 3:04 pm ]
Post subject:  Re: itbs

Hey, how is the ITB project coming along?

Author:  dominator [ Wed Nov 02, 2011 3:28 pm ]
Post subject:  Re: itbs

not to bad mf
finaly found some velocity stacks that dont cost an arm and a leg, they are for some webber 45`s but the bore size is perfect, my itbs taper down to 36mm from 45 on the main bodie
they will take some mods to get them right, but nothing i cant handle :wink: ... hotostream
iv setled on adaptronic ecu from aus
it works with all of the original sensors inc the dizzy crank sensor, the unit has a built in map sensor so i can do away with the maf, so its a simple setup, with scope for upgrading to a 36-1 trigger and proper electronic igntion, maybe something similar to your setup, i like the idea of not having a seperate coil pack
the only thing i need to do now is work out what sort of plenum im going to make and if i have to mod my strut brace to suit


Author:  MF89 [ Wed Nov 02, 2011 3:43 pm ]
Post subject:  Re: itbs

Hey, Thanks for the update. The Vstacks look almost perfect. Actually, your setup like quite simple with the bolt-on runners to the flange. 8) Keep us posted ;)

Author:  ROV [ Wed Nov 02, 2011 3:50 pm ]
Post subject:  Re: itbs

You've made an excellent decision on the velocity stacks.
This model is the best ever.
I know, I bought a set and replaced my short very expensive velocity stacks with them and they were great, very noticeable performance gain , plus they didn't crack with my solid engine mount and not rubber spacer between the carbs and the manifold.

Author:  dominator [ Thu Nov 03, 2011 3:01 pm ]
Post subject:  Re: itbs

almost :wink: , very simple setup, the itb o/e rubber runners are round -oval, they took a bit of grinding work to get them matched to the suzuki flange, the grinding exposed an ali base in the rubber so i can seal up the gap using a bit of cold weld as the original seals wont work
that was the easy bit, still working out how im gona fit the stacks and still have them removable from the bodies

i got the vstacks on uk ebay, £35 shipped from hungary, they are cast but machined on the inner surface with no bubbles so they must be a good cast
nice large radius should help the airflow alot


Author:  dominator [ Tue Dec 20, 2011 3:30 pm ]
Post subject:  Re: itbs

made some good progress on the bodies
cleaned them up from all the oil and grime, made up some rings to cold weld on so i can fix the vstacks and filter backing plate properly
hopfully over the hols i can get the threads cut and paint up the bodies


Author:  G-sus [ Tue Dec 20, 2011 4:00 pm ]
Post subject:  Re: itbs

That cold weld stuff is awesome, used some on my motorcycles engine block which had a small leak, no more leak and it's just as solid as the metal :)

Author:  dominator [ Mon Jan 09, 2012 1:42 pm ]
Post subject:  Re: itbs

iv done the main bits on the itbs now
got a good 2nd/h filter on ebay, made a new backing plate which will also be used to bolt to a plenum box, so it looks a bit shit on its own
just got to clean everything and spray it all up
made a little mistake when i trimmed the v stacks, one wasnt lined up with the screw holes when i marked them off :oops:


Author:  G-sus [ Mon Jan 09, 2012 1:52 pm ]
Post subject:  Re: itbs

looking good :)

Author:  dominator [ Thu Jan 19, 2012 4:00 pm ]
Post subject:  Re: itbs

started on my vacuum mani
found a nice bit of ali box, i used npt fuel conections, just got to weld on some sides and its good to go ... hotostream
next up catch tank, i found some bits for a level gauge, just wating for them to turn up and i`l start on it


Author:  dominator [ Sat Feb 04, 2012 2:33 pm ]
Post subject:  Re: itbs

almost done the catch tank, just got to do the bottom
i used the push on fittings for both ends, they can handle 10bar of pressure so im hoping it wont leak ... hotostream

Author:  Swifted [ Tue Mar 06, 2012 9:17 pm ]
Post subject:  Re: itbs

Hey, I used a similar setup oil catch tank on my GTi, then I realized that the air filter I was using only had a 1/2" ID fitting, which meant that both 1/2" lines coming from the Cam Cover were being reduced down to a single 1/2" port. The problem that I ended up with was that the pressure increased and I was getting loads of Oil vapor bypassing the baffles in the catch tank and were coming straight out the air filter!

I ended up buying a K&N filter for a motorbike which had a 1" ID flange, then installed a larger hose barb flange on the catch tank to accept the Air Filter upgrade.

here is what it looked like before I replaced the air filter with the larger one


I will get a pic of what it looks like now soon.

Author:  dominator [ Wed Mar 07, 2012 5:28 am ]
Post subject:  Re: itbs

I see where your coming from, my filter is 17 id so it might be boarderline with the back pressure
Tbh I didnt even think about a baffle, looks like im modding it
Thanks for the heads up


Author:  Swifted [ Wed Mar 07, 2012 7:02 am ]
Post subject:  Re: itbs

No prob. mate ...I'll try to get a photo up later showing how the setup looks now.

Author:  Swifted [ Wed Mar 07, 2012 9:45 am ]
Post subject:  Re: itbs

Here are some photos I just took.





Author:  PBC137 [ Wed Mar 28, 2012 6:57 pm ]
Post subject:  Re: itbs

Swifted in that first pic of your last post you almost had me guy! I was wondering wth is that hose coming from the filter itself...only scrolling down I saw it was the coil to dizzy lead. :lol:

Author:  dominator [ Fri Apr 06, 2012 6:16 am ]
Post subject:  Re: itbs

:lol: same here
i managed to get an engine in my spare chassis
but iv had to abort the filter plate/plenum due to the master cyl in the way ... hotostream
i reckon i can still use the filter but i`l have to make a new offset backing plate :roll:

Author:  ellpee [ Fri Apr 06, 2012 4:08 pm ]
Post subject:  Re: itbs

Good choice on Adatpronic.
Very very versatile EMU and prioce competitive. The 440 has some really cool tricks.
Are you gonna install the speed sensors on the wheel hubs to configure traction control?

I was wondering what the original ITB's were?
I got a set off a toyota AE101 with the ITB manifold intact. The ports are damn close. I have a half manufactured adaptor plate beteen them. the ports match up enough so that the angle of entry is only about 20 degrees off centre. The entry is oval already and the same size.

The AE101 and manifold have a second set of injector holes. Who needs big injectors if you can squirt two at once?

Author:  dominator [ Sat Apr 07, 2012 5:20 am ]
Post subject:  Re: itbs

I first found adaptronic looking for ecu adapters, they make one for the swift loom but the older model 440
I got chatting with the uk dealer, he uses a similar setup on his drag car, like you say its very versitile
Im keeping it simple with the initial setup, just using all the oe sensors bar the maf and tps, and some cultus cams instead of the 952s, then upgrading all of the ignition, trigger etc when the lumpy cams go in
Not a big fan of tcs, especialy with the modest power of a n/a swift, but handy in the rain I guess
The itbs/runners are from a 600 sports bike, mounted on a laser cut g13b flange, no injectors so I can keep the oe inj and fuel rail

Author:  G-sus [ Sat Apr 07, 2012 5:26 am ]
Post subject:  Re: itbs

What specific sports bike?

Author:  dominator [ Mon Apr 09, 2012 4:02 am ]
Post subject:  Re: itbs

Not a honda :wink:

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