Injector advice please?
Injector advice please?
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Discussion

s3c chris

Original Poster:

306 posts

152 months

Thursday 9th August 2018
quotequote all
Hi everyone.

I am hoping someone will be able to give me some advice regarding injectors please?

My car is a year 2000, 500, standard spec apart from an MC1 cam fitted by a previous owner around 5k miles ago. I have no idea on the current power output.

Whilst thinking about some minor modifications, i.e. plenum trumpets, induction kit etc., my thoughts turned to the injectors. I don’t think there will be any major mods in the future, a stealth cam maybe If a change becomes necessary and if I am brave enough I rather fancy a GEMS conversion.......

What recommendations are there for the injectors? Clean the Lucas ones, fit Vectra ones or Bosch? The Bosch flow rates confuse me a little, 215 cc seems to be the standard “upgrade” for the Rover engine but would a higher flow be beneficial at all on my car? The Vectra ones offer a higher flow rate at 250cc. There is a company in Spain which I think has supplied a few of you with reconditioned injectors at reasonable prices and they are the ones advertising the 215cc injectors.

If anyone can help that would be appreciated.

Regards Chris.

Classic Chim

12,424 posts

171 months

Friday 10th August 2018
quotequote all
I think you’ll need a Dyno run or a flat out run somewhere with diagnostics checking your AFR readings at high revs to decide if your flow rate needs increasing.
I have speed six injectors fitted as they have a better spray pattern ( apparently) as part of my MBE install by Powers.
For all but flat out I’d have thought a better spray pattern will benifit you more than just a higher flow rate.

ITVRI

198 posts

204 months

Friday 10th August 2018
quotequote all
The standard Injectors you have currently will handle your current engine spec and if you want to be sure you could have a quick run on the dyno to make sure they are working as they should.
The induction modifications you mentioned will be ok using the standard injectors but you can always have another dyno run after to confirm this.
If you upgrade induction and the heads I would then look at higher rated injectors as the engine will likely be putting out 300+ hp
If you change the injectors or the heads you will need a dyno run and remap anyway.
Speak to Joolz at Kits and Classics who has a dyno, can reprogram your orginal 14cux computer and will give you good honest advice with the experience to back it up.

Steve_D

13,801 posts

280 months

Friday 10th August 2018
quotequote all
I think you should be able to run RoverGauge in 'Log' mode and go for a drive putting it at full power/load. Log the injector duty cycle which will hopefully be about 80%.
If it reads 100% you have maxed out the injectors.

Steve

rev-erend

21,596 posts

306 months

Friday 10th August 2018
quotequote all
Get some Bosch gen 3 replacements .. people here have found power gains..

blitzracing

6,418 posts

242 months

Friday 10th August 2018
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Mark Adams did a really good post on injectors some years ago, ill see if I can find it.

s3c chris

Original Poster:

306 posts

152 months

Saturday 11th August 2018
quotequote all
Thank you for the replies.

The Mark Adams post would be interesting if it can be found thank you.
The 215cc Bosch injectors are advertised as a direct replacement for the Lucas ones so I assume a re map wouldn’t be necessary?

The Lucas injectors I think are 185cc flow rated so the Bosch would be slightly more but I believe have a much better spray pattern.

Many thanks Chris.