Fitting Jenvey's/ITB's.....

[SLEEMAN]

hey guys

i'll be fitting my jenvey 45's to my puma 1.7 soon

I've taken off the inlet manifold to find the fuel rail is actually on the head and not the inlet manifold bit obvious I know but first time ive taken apart a 1.7 more used to taking apart 2.0 silvertop zetecs

as the jenvey 45's have fuel injector holes and the standard fuel rail is there in place what do I do block up the holes on the TB's or on the head

I was either thinking of adding some other injectors as i'm using the car for track use wasn't sure if I can used low CC injectors to combine with nitrous or see about water injection to keep cool.

also another question about injector CC sizes, I think the jenvey standard fuel injector kit come with 660cc injectors, someone told me for use for smaller engines sizes I should consider different injectors. I had acquired some GM purple 250cc injectors and told they should be good enough, but would they actually be fine for track use??

 

[tuonokid]

Hi Mate
What ECU are you using to manage the system? 660 cc injectors are far too big and I think 45mm Jenveys may be as well.
Barry

 

[SLEEMAN]

i'm going to be using omex 600, I haven't got it just yet. I was going to use a mtech v4 management that I got cheap but going to sell on as I can't get a wiring loom for it

 

[tuonokid]

Omex 600s a good choice, I also bought an M-Tech V4 for the Westy I'm building when I didn't know as much as I do now. Turns out it's a pirate megasquirt and as I was mounting it in the car the micro USB port broke off because of poor soldering. Took it out of it's box and the MAP sensor pipe wasn't even fitted. When I get round to working on it again if it doesn't work I'll just bin it and use an Emerald K3 I've got going spare.
Barry

 

[SLEEMAN]

sounds good, I though 45's sound big but I mean they have potential for the future

just would like to know about the injectors and fuel rail setups

 

[tuonokid]

When you buy a Jenvey kit you usually get the fuel rail with it and it bolts onto the throttle bodies just at the back of the injectors. For under 200 bhp you might be better off with Bosch cream injectors which are 280cc if my memory's good. I don't know for sure but I think 45 Jenveys are too big and you will lose lower rev driveability, 40s will be a better bet and usually cheaper second hand.
Where are you having it mapped because if you're near Northampton motorsport they might offer you some advice as they're specialists in Omex and will have worked on Westfields running 1.6 Sigma engines. That also reminds me maybe the Omex 600 might not be able to cope with the VCT.
Barry

 

[SLEEMAN]

ahhh ok, I know with zetec silvertops they say that the longer the throttle bodies more power can be achieved is it the same with the 1.7 zetec se engines?

i'll think about those beige injectors, so far got Siemens GM purple 250cc injectors wasn't sure if they were good enough

and I did get a fuel rail kit in with the TB's however my dilemma is that there is one fuel rail already on the cylinder head as is that I can't remove as I assume its supposed to be part of the cylinder head and then I have the fuel rail for the jenveys so when I bolt it all up it looks like I have two fuel rails. but wasn't sure if I could adapt the fuel rail for the jenveys for something else as it hasn't been used

 

[siju]

AFAIK the omex 600 can control the VCT for only two positions. So you basically have one timing position for low and one for high revs. The 710 provides continuous VCT control.

 

[SLEEMAN]

well ok seeing as I haven't bought an ecu as of yet, is there a good ecu that can do everything for what I want running the jenveys with the 1.7 engine and knowing i'll be using it for road and track use

 

[tuonokid]

Just had a look on the Jenvey site and this is all I could find listed for the Sigma engine.
http://www.jenvey.co.uk/products2/direct-to-head-throttle-bodies/ford-sigma-direct-to-head-42mm-dbfs-42
Have you managed to get an inlet manifold for the 45s you've got as the Sigma is a very short engine compared to the Zetec?
Barry

 

[SLEEMAN]

yeah I've just bought an inlet manifold for them, hoping it all fits up well.

if it doesn't ill try and flog them on so I can buy the direct bolt on ones instead

 

[siju]

I haven't tried anything myself but the omex 710 and emerald k6 have good reviews and can run properly the VCT.

 

[Wild E. Coyote]

Why don't you just leave the stock ECU running the VCT and get the fuelling and sparking done by another ECU?

 

[SLEEMAN]

bad news on the manifold, it fouls on a couple of places so its more ideal for the 1.6 se engine. so i'll probably be getting direct to head ones instead and listed my 45's up with the manifold on ebay if anyone is interested

in regards of aftermarket ecus when fitting them do they completely replace the stock ecu then??

 

[tuonokid]

Hi Mate
I would have thought the inlet manifold for the 1.6 and 1.7 was the same so it's more likely that it's one for the Zetec E rather than the sigma. As regards the ECU you can't just plug your replacement ECU onto the stock plug, there's a custom harness and some re-wiring to do.
Barry

 

[moondustka]

The ECU and wiring is one of the most critical things. What's right for you will more than likely depend on budget, but 'all singing, all dancing' ECUs aren't as expensive as they were 5+ years ago. I've had Omex 600 since 2008 and whilst it's ok at its job, it can only run the very basics of an engine - not good if it's important to you that it lasts. Put it this way, fitting Omex 600 in replacement of the standard Ford ECU is a downgrade. Trying to re-calibrate the original ECU would be much much better.

 

[Wild E. Coyote]

And I know who can do it :wink:

 

[SLEEMAN]

[post]356822[/post] Hi Mate
I would have thought the inlet manifold for the 1.6 and 1.7 was the same so it's more likely that it's one for the Zetec E rather than the sigma. As regards the ECU you can't just plug your replacement ECU onto the stock plug, there's a custom harness and some re-wiring to do.
Barry

nah its for the sigma engines as the bolt pattern is the same, however the angle of the manifold is too high so fouls on the standard fuel rail which isn't too much of a problem as I could remove it however the alternator top bolt fouls. probably would fit if I could relocate the alternator

 

[SLEEMAN]

[post]356843[/post] And I know who can do it :wink:

that I would like to know as it would greatly help being a budget track car after all! just so happened I have a set of jenveys lying around!

and also I've been a dick!

the manifold does fit, just have to remove the alternator and the fuel rail, and do some engineering modifying the manifold so the original fuel rail can fit good unless anyone knows what to block off the holes to the cylinder head?

alternator does foul the manifold a bit so gotta grind some metal to make a little bit of room

 

[Wild E. Coyote]

Try contacting pumanoob here.... :wink: