Vectra injectors fitted to a NA 4.6.

[carsy]

ChimpofDarkness said:

Nice one Peter

On the basis of your impressive results I will be fitting an adjustable fuel pressure regulator as part of my new Canems engine management installation

This will make fuel pressure another parameter to work with when we map the new system and should allow me to take full advantage of the Vecta injectors for the first time since I fitted them two years ago

Bye Bye distributor, 14CUX & Mr Mark Adams

It's time for me to embrace the future

Any particular reason why you have decided on Canems over the other well known ones.

[Simon says]

ChimpofDarkness said:

haircutmike said:

My stage 4 heads, shortened and bored Trumpets and ported manifold gave the biggest increasen about 40+ iirc!

Ok, that does it, I'm aiming for the first 300hp 4.0 litre then.

Good luck with that and trying to keep some road manners I reckon 270 out of a 4.0 is a sensible target and makes for one sweet motor that spins round the tacho with gusto a good RV8 is all in the heads as most of us know already with a decent cam of course i reckon Peter as done well and with a 4.6 beats Daz harping on about he's 5.0 output for a change too .....

[Bassfiend]

carsy said:

ChimpofDarkness said:

Nice one Peter

On the basis of your impressive results I will be fitting an adjustable fuel pressure regulator as part of my new Canems engine management installation

This will make fuel pressure another parameter to work with when we map the new system and should allow me to take full advantage of the Vecta injectors for the first time since I fitted them two years ago

Bye Bye distributor, 14CUX & Mr Mark Adams

It's time for me to embrace the future

Any particular reason why you have decided on Canems over the other well known ones.

Lots of reasons - it's a long story!

Phil

[EGB]

haircutmike said:

My stage 4 heads, shortened and bored Trumpets and ported manifold gave the biggest increasen about 40+ iirc!

Easy questions:
I think its called impedance.
Lucas impedance = ?
Vectra impedance = ?

Is it a straight swop into a standard 500.
Thanks
Eddie

[Simon says]

EGB said:

haircutmike said:

My stage 4 heads, shortened and bored Trumpets and ported manifold gave the biggest increasen about 40+ iirc!

Easy questions:
I think its called impedance.
Lucas impedance = ?
Vectra impedance = ?

Is it a straight swop into a standard 500.
Thanks
Eddie

Both injector sets are High Impedance Hotwire are 16.2 ohms and the Vectra one's 15.3 ohms

[SILICONEKID340HP]

Simon says said:

ChimpofDarkness said:

haircutmike said:

My stage 4 heads, shortened and bored Trumpets and ported manifold gave the biggest increasen about 40+ iirc!

Ok, that does it, I'm aiming for the first 300hp 4.0 litre then.

Good luck with that and trying to keep some road manners I reckon 270 out of a 4.0 is a sensible target and makes for one sweet motor that spins round the tacho with gusto a good RV8 is all in the heads as most of us know already with a decent cam of course i reckon Peter as done well and with a 4.6 beats Daz harping on about he's 5.0 output for a change too .....

Mines more like 350hp Its not been on the rollers since the new Bosch Gen 111 30lb injectors .After sending a datalog to Philip he told me the original injectors

were flat out at just of 5000rpm.

I still think just fitting larger injectors and useing an ajdustable fuel reg is a bit crude..I bet a 4l would just flood .

Some one did explain why at some point but i can`t find it ..

[haircutmike]

Lucas fueling.



Vectra fueling.



Not perfect but good enough for now.

[daxtojeiro]

Looks like the new injectors have richened the whole table by around 5%, which is down to the spray pattern and possibly better flow rates.

My concern with them is that the originals seem to run out of fuel near your BHP value, so the 5% is a help but maynot be enough.
Its impossible to say for sure, but if I were to recommend anything, I would always go for slightly bigger injectors if going over to an after market management system, if not you could be too close to the limits,
Phil

[Simon says]

Thing is Phil even being modest towards the Hotwire inj's 200cc/19-lbs Vs 250cc/24-lbs the Vectra Inj's flow at least 25% more fuel and being pintle design can have the fuel pressure upped above what the Lucas units can stand as a parachute if things get greedy but i can understand the duty cycle argument though although if necessary i would imagine 90's Mustang Bosch 30Ibs'ers could cope with most HO naturally aspirated RV8's

Edited by Simon says on Sunday 24th June 21:03

[ChimpofDarkness]

daxtojeiro said:

Looks like the new injectors have richened the whole table by around 5%, which is down to the spray pattern and possibly better flow rates.

It's a good point Phil.

Peter, can you share the fuel pressure you ran the Lucas disc type at, and the pressure you ended up running the Vectra ones at?

[Simon says]

Not sure how accurate this is but kind of backs up what Phil warned if you tap in the figures, comes out that Peter is pushing the Vectra inj's some already (well according to that chart) http://www.witchhunter.com/injectorcalc1.php4 thing is for the Lucas at the moment its probably as far as he can go until the MS install at least well short of a Mark A visit

[Alexdaredevilz]

I disagree with the fact that the lucas injectors were running out of steam going by that dyno graph, you can see it richen's up at the end, if they were running out of duration it would lean out

I think the extra power is down to the better spray pattern,

I got BMW Mini Cooper S injectors ready to go in mine, there 330cc's

[daxtojeiro]

Simon says said:

Thing is Phil even being modest towards the Hotwire inj's 200cc/19-lbs Vs 250cc/24-lbs the Vectra Inj's flow at least 25% more fuel and being pintle design can have the fuel pressure upped above what the Lucas units can stand as a parachute if things get greedy but i can understand the duty cycle argument though although if necessary i would imagine 90's Mustang Bosch 30Ibs'ers could cope with most HO naturally aspirated RV8's

Edited by Simon says on Sunday 24th June 21:03

Looking at those graphs, thats 5% increase, not 25%. Both can have the fuel pressure increased, but thats not to be recommended, especially if your buying new injectors, you may as well go for something that will do the job, I would go for around 30LB injectors,
Phil

[Simon says]

daxtojeiro said:

Simon says said:

Thing is Phil even being modest towards the Hotwire inj's 200cc/19-lbs Vs 250cc/24-lbs the Vectra Inj's flow at least 25% more fuel and being pintle design can have the fuel pressure upped above what the Lucas units can stand as a parachute if things get greedy but i can understand the duty cycle argument though although if necessary i would imagine 90's Mustang Bosch 30Ibs'ers could cope with most HO naturally aspirated RV8's

Edited by Simon says on Sunday 24th June 21:03

Looking at those graphs, thats 5% increase, not 25%. Both can have the fuel pressure increased, but thats not to be recommended, especially if your buying new injectors, you may as well go for something that will do the job, I would go for 30LB injectors,
Phil

Yeh, cant work that out Phil as the info on both sets of Inj's (off Tinternet) tell another story of course its possible Peter is running a lower FP than when he was using the stock Hotwire Inj's maybe and hence the 5% only bit

[Alexdaredevilz]

If you compare say at 4500rpm where the afr is near enough the same, so ignore pressure and flow for a second, the afr is the same'ish' but the spray pattern is different, you can see a increase in HP and probably torque aswell

[ChimpofDarkness]

Bassfiend said:

carsy said:

ChimpofDarkness said:

Nice one Peter

On the basis of your impressive results I will be fitting an adjustable fuel pressure regulator as part of my new Canems engine management installation

This will make fuel pressure another parameter to work with when we map the new system and should allow me to take full advantage of the Vecta injectors for the first time since I fitted them two years ago

Bye Bye distributor, 14CUX & Mr Mark Adams

It's time for me to embrace the future

Any particular reason why you have decided on Canems over the other well known ones.

Lots of reasons - it's a long story!

Phil

Phil is correct

Never one to jump into something blindly I researched the whole engine management change back to front & inside out before I finally settled on the Canems.

I looked at MegaSquirt, Canems, DTA, SCS, Emerald, Omex & Link G4, so there is certainly no shortage of options out there.

The first thing I learnt was they all do more than I need them to.

I won't bore you with the all details but pretty quickly I whittled it down to a short list of two.

Emerald & Canems.

That's when I started to put the pros & cons of each system under the microscope.

It was a very close run thing that came eventually down to two things.

1) Price - I was able strike an unbeatable deal on the Canems without compromising on quality & backup

2) A unique Canems feature - This feature perfectly matches a future development objective I have for my Chim

When evaluating such things I always think you know you've found your winner when it ticks all the boxes, then ticks one more than the nearest competitor.

Then comes in £400 cheaper too.

The truth is at this stage I still can't say for sure I've made the right decision as currently all this evaluation is just on paper.

As we all know, the proof of the pudding will be in the eating.

What I can tell you is I expect to be extensively tasting that pudding in late July

[haircutmike]

Going by the vague method of switching on the ignition and taking a reading of the pressure before the pump cuts, the pressure with the Lucas injectors was about 40 lbs and now is running an indicated 45 lbs.

[ChimpofDarkness]

haircutmike said:

Going by the vague method of switching on the ignition and taking a reading of the pressure before the pump cuts, the pressure with the Lucas injectors was about 40 lbs and now is running an indicated 45 lbs.

Thanks Peter, looking at the graphs that would make sense to me.

You are so so ready for the new ECU & putting that dizzy in the museum

[SILICONEKID340HP]

I only paid £300 for my megasquirt instalation and full rolling road map..

Worked out well but he did not spend enough time with the Spark ..

Nice Tidy wiring and he mounted the coil packs etc .

Also fixed so wiring glemlins ..For some reason he insisted on two wide band lambdas.

He produced these graphs .

Edited by SILICONEKID340HP on Sunday 24th June 22:53

Edited by SILICONEKID340HP on Sunday 24th June 22:55

[ChimpofDarkness]

SILICONEKID340HP said:

I only paid £300 for my megasquirt instalation and full rolling road map..

That's a bargain Daz.

£300 for a MegaSquirt installation