hi all been planning my itb conversion and just wanted to see what you all think of this set up? pluss any extras?
gsxr750 bodies
st170 inlet manifold
mega squirt ecu (fitted and mapped by me but tweaked on the rollers by a pro)
and not sure if the standard cable will work but hoping it will so will get a spare one.
would this set up work? to me logically it will after lots of reasearch it seems like it will looking at other set ups.
what else will i need apart from some pipes to connect tbs to the inlet? randum bolts and jubuilee clips. Any thing else?
alex

standered injectors will be on there limit at 180 i think.???
get sum ford racing ones

im aiming for 170bhp dunno if it will even make that tbh but i can try! do you think the set up will work? want to start looking for parts asap!!

alex

for throttle bodies i contacted these very very gd price 1500 quid supplied fitted and mapped wiv a stand alone ecu. pick ur car up at cost price 2.

http://www.mtechautomotive.co.uk/throttle-bodies/

but yes iv over zetecs running wot ur plannin so dnt see a problem other than ur'ss need a adapter plate for the throttle bodies.

pepperperformance sell em. they r a kit car company but if u ask them they make 4 normal cars 2. ie longer in let manifold.

http://cgi.ebay.co.uk/RED-ZETEC-DCOE...item3ca6b2154d

here ya go,

1.8 won't make much over 160 or so bhp mate with bodies alone will need some moderate headwork and if you want more power raised compression, different pistons and rods. Speak to STBash from FFOC he is currently doing this conversion probably best person to speak to M-Tech are also very good at this stuff would be good to speak to them also. I'm making 145bhp with cams, under drive pulleys, vernier pulleys, ST manifold etc etc etc with bodies doubt I'd make much over 160bhp probably be around there but to take advantage of motorbike throttle bodies need to have a higher rpm limit as they more suited for higher revving engines like motorbikes obviously if you went for car specific throttle bodies from Jenvey or similar would be slightly different story but with standalone as well I'd get some ARP rod bolts maybe even change rods and set rev limit to around 7300-7400rpm especially with cams and headwork most of the gain comes in the more you rev with throttle bodies and mdoerate/heavy tuned N/A engines.

pani k mine made 144bhp b4 i fitted cams.

Sounds good mate plenty of people seem to be making good power from their 1.8s mine seems to be slightly lacking somewhere but not too bothered it drives mint so I'm happy I was making 132bhp 140ft.lbs of torque before cams but previous owner told me it made 145 ft.lbs of torque on another dyno with about 134bhp so swings and roundabouts. With cams I'm making 145bhp 127ft.lbs of torque. Ran a 16.5 sec 1/4 at the pod fully loaded with ICE in the back so pleased with that. Might get a remap on it not sure yet.

fair play fella glad ur happy wiv ur car, lets be honest tho none of our cars will be fast if it's 140 150 160 170 180bhp not gonna be a rocket ship lmao.

pani k im also on the ffoc (same user name, dark blue focus with white stripes and alloys) im at 144bhp and 141ftlb atm, ive paid a deposit on a set of cams, verniers and udp's so hoping for 150bhp and 115 at the wheels, currently at 112 at the wheels atm i think. just wondering with bodies etc if i could hit 170 bhp? then if/when the engine goes drop a 2.0 in and transfer all mods over?

alex

Apart from the issues I've noted for you over on FFOC, another one with the ST170 inner manifold is the size of the ports in the head. The window in the ST170 manifold is about 5mm higher at the top leaving a big step on the head right in front of the injectors.

Are you going to take the head off to match the ports?

Martin

i do remember you posting a pic on the ffoc before about that martin. could it not be reshaped using chemical metal or some form of resin? keep the injectors in the TB's rather than in the manifold and blank the injector ports off? or am i trying too hard? lol

i need do a little work to my inlet manifold before i put it on the car, hack away at the scuttle panel too as the plenum will be pretty much ontop of the wiper motor

to link the tbs to the inlet couldnt i use some silicone hosing as that should ovalise to the shape of the manifold and the other end be nice and round to go on the throttle boddies? secured by jubiliee clips?

alex

Unfortunately the japanese injectors have different inlet/outlet dimensions to Ford/Bosch/etc injectors. Using the ST170 location means the existing rail, regulator, piping, and normal injectors can be used. Yes you can smooth it a bit with chemical metal, but try to ensure you minimise any sharp angle at the head face.

Martin

I'll be honest regards bike TBs. They are trouble. Alot of the guys on yhere who have them working will testify to the work they had to put in. Problems such as throttle travel, port matching and balancing means its usually easier just to go with a Jenvey setup (especially with our prices )

As pani_k rightly said, 1800s on RS cams usuall make circa 155/160 on Jenvey setup. headwork does free it up, but ulitmately you cant beat CC's

If you are sourcing St17o manifolds, try and grab ST170 injectors, with an APR these flow more than enough for 200bhp. The standard beige injectors from a 2.0 Focus/Mondeo can run up to around 170 no problem as well. (85% DC, 4 Bar)

The faffing factor and ultimately the dissapointment you may get from lacking power means that I would not ever reccomend them. We do the jenvies at cost price, so we dont make any money on them, but as a tuner, I always shy away from DIY TB setups on account of the time it takes to get them right.

Hope that helps!

Matt

The placement of the inectors will affect fuel swirl and ulitmately where the troque comes in on the rev range. For a low revving (comparitively chaps!) Zetec you would want to place them as far away as possible!

Matt

bollocks!

Decent set of cams and bodies it will make 160bhp!

ive got all the time in the world to get them set up! i aint in no rush whats so ever and your set ups are still like £1800? and all the bits can be brought for 700-800? if you buy in bits. so im going to try this method first as its a project so to speak any way and then if it all goes tits up then will get some more help

alex

Read what I wrote again, where does it say it won't make 160bhp!!! Especially since you are trying to maximise flow efficiency of air into the head if you are going to go bodies why wouldn't you get some porting and polishing done on the head? It starts getting restrictive around 170bhp or so anyway.

Unnecessary costs if you don't plan to go past 170!

Alex,

As you orignally posted circa £1500-£1800 supplied fitted and mapped. The Jenvies from Jenvey around £900, ECU, £495, leaves about £300 for labour. Thats wiring it all in and mapping, and bolting the bodies etc on.. That price cannot be easily beaten in the UK....

ToTD have on their site £1600+VAT for supply and fit of an OMex 600, less features to start with, oh and no TBs....



Matt

it is a good price but im going to do it on my own first and see where i end up, ive got my hands on a spare engine to do all the mock up on now as well

alex

But what Jenvey TBs and manifold and airhorns and airfilter is that? The Focus install alex_666 is planning is very tight unless, as STbash has indicated, you cut out the scuttle.

Martin