ITB Build Thread

Cracking efforst there Ray, lovly craft manship and as the rest of the boys have set, well though out!

 

The injectors are just from a C20XE however i'm using the blue ones which have a slighter higher flow rate and different spray pattern compared to the earlier cream injectors used on pre cat engines... The guy who built the engine and is mapping it said that the blue injectors give about 5bhp more on a 200bhp engine just due to the more efficent spray pattern.

Since I last posted I've made up some nice stainless high pressure fuel lines, the wireing loom for the ECU is complete, I've fitted a generic Bosch air temp sender in to the back of the backplate and i've had a alloy rad custom made to allow the TB's to have a free supply of cold air.

the Rad is lower than the head so I decided to have a seperate header tank mounted up high or else filling the system would be a nightmare. I've also fitted a VR6 aux water pump in to the system to stop any hot spots occouring after the engine has stopped.










the rad has 2 lugs that fit in to the factory holes in the slam pannel, however these have been drilled out and the lugs sit within a rubber mount.

I Haven't made the top mounts yet but they will be attatched to the 2 M6 threaded lugs on the top by 2 rubber fuel pump mounts.. This cuts down on alot of vibrations and in the event of an impact the radiator should break the mounts before any bad damage occours.

Just gota get a couple of 8" fans for it, mount the header tank and connect it all up with some samco.

 

Looking good

 

quality workmanship , who built your rad super job, every thing well thought out

 

very nice install carnt believe I missed this thread

 

Hello mate,

Excellent job, alot neater than i did with my throttle bodies (little pic below) Just a word of warning, bike brake cables tend to streach easier than you would think, so might be worth doubling this length up or possibly using a car linkage?

I did a little bit of research and found some bike bodies with similar spacing to my head ports and then went from there, my inlet manifold is made of quite thin ally though, so i need to sort some extra mounts for the bodies, it has covered about 300miles on this set-up so far, i still need to address quite a few issues.

Be nice to compare notes sometime

Here's a quick pic of my inlet set-up:



I like what you have done with the trumpets, i may have to copy, but with shorter ones, Dave Vizard thinks you can get a great deal more air by having a radiused entry into the port, so that's the plan!

Excellent work mate, good to see someone else has similar thoughts to me (i'm not mental afterall )

Cheers

Pete

 

Radiator and tank was made By Ian Drowne Of Drowne Engineering down here in Devon. PM me if you want contact details for him.

I'm prity happy with the linkage on the ITB's, ive got a return spring on the throttle quadrant and a mountain bike brake cable going to a punch bolt mounted in a slightly modified brake pedal.

Managed to get the ratio just right aswell, With the throttle just slightly lower than the brake pedal the throttles are closed and with the pedal on the stop it's at WOT

Best thing is to get hold of some jenvey trumpets that are near enougth the same diamater as the inlet of the TB's Then it's just a bit of head work to work out a way of sticking them on there.

 

Coming together a treat

 

Very impressive stuff!

 

car and the rad look great what events are you doing this year, be great to see the car in the flesh

 

Low throttle openings at low RPM ? NEver seen ray drive before then


Gonna be a punisher Ray get it mapped !

 

Very nice indeed!

Whats the spec of the engine?

 

Had to make up a custom water outlet for the front of the head to clear the TB's, thourght it may be of interest to others.



Engine Spec in breife is:

Dave Crissel head
Cat Cams 283/279
Uprated springs
Supersprint grp A exhaust and manifold
ITB setup
Omex Engine Management
KR bottom end with 11.8:1 CR
schrick sump

not mapped yet but will put some graphs up in the next week or so when it's done.

Should be in the region of 180-190bhp

 

& should sound sweet.

 

How moderate a profile?

 

They are a split duration 283/279. I was going to use profile kent use for the C20XE which my engine builder gets good results with. However before i went ahead and had some blanks ground up I came accross the cat cams above which are very similar... same suration +/-few degrees and alightly less lift

Considering the 276/268 Schricks in ChrisMc's 9A will make power to 7500 I expect the cat cams to be driveable from about 3k, come in with a bang at about 5000, peak arround 7k and hold power to 7500+

 

cat cams are very nice....as used by VWM

 

One of the lads over on wpce.org is fitting them like this to his escort:

Freshly rebuilt 2 litre zetec (built at Ford main dealer)
* New NGK R Lazer Platinum plugs
* Coilpack and Leads
* GSXR1300 (hyabusa) throttle bodies professionally fitted to a Weber inlet manifold (all ported to match)
* Injectors, loom and Modified fuel rail
* Coil Pack and Leads
* New pair of fast road/race cams (still boxed)
* Set of Piper anti pump followers
* New Retroford Water rail
* New Retroford World Cup Engine mounts
* New Retroford flywheel and clutch
* New Retroford RWD sump
* RWD Water pump and correct pulley
* ARP Bolts used on rebuild

Expected to be approx 200BHP

 

Sounds like a good spec.

Why have you decided not to go 2 litre?

 

I picked up some 81.43mm new old stock KS pistons for a very good price so that kind of dictated the route. I also had a KR laying around from the ABF conversion I had done on my dad's Mk2 16v previously.

Initially I was trying to get a nice square bore/stroke so was looking at some 83.5mm pistons with the 86.4mm crank. However it's built on a serious budget and it should put out similar power to the regular DTH, 276/268 Schrick'ed 9A's.