What injectors for the Griff?

[G5FTH]

Hi Everyone,
I have tried the "search" facility but no answers.
My Griffith 500 had a high mileage when I bought it (90k) and to my knowledge the injectors have never been replaced.
It has had an engine rebuild and I am just looking to get the best out of it. I have seen injectors listed as being for all Rover V8 engines, but they are much cheaper than ones listed for the TVR on specialist websites.

What are the best/correct injectors for the Griff?

Thanks as ever!

[G5FTH]

I thought about having the old ones cleaned, but the price of the new rover v8 ones looked a better option.

[G5FTH]

FlipFlopGriff said:

I've bought these but not fitted yet. Straight replacement and slightly higher capacity and better spray pattern. You may need to check fuelling after fitting though:
http://www.ebay.co.uk/itm/Vauxhall-Vectra-B-2-0-16...
I paid around £5 each and then had them cleaned and refurbed for £110.
FFG

Thanks, I wonder how much these are new - can't be that much more?

[G5FTH]

RichB said:

Some years ago the thinking was to replace the Lucas ones with Bosch injectors. The theory being that they produced a fine spray pattern as opposed to the Lucas ones that simply sprayed out drops of fuel. I don't know if the overall quality of injectors has improved in recent years.

I spoke to Mark Adams about injectors and he recommended the Bosch units because of the spray pattern. Very helpful bloke.

Edited by G5FTH on Thursday 4th February 08:26

[G5FTH]

Just an update for those who are interested.

I have just bought a set of refurbed and flow matched Bosch injectors from the states.
£160 including delivery which I thought was pretty good value.

I'll need to up the fuel regulator and give them a go.

Cheers!

[G5FTH]

Hi Everyone,
Just an update really. I looked into various injectors and cutting a long and painful story short I have now fitted Bosch 0280150556 injectors.
Honestly this is the best hundred quid I have spent. These were refurbished units on Ebay from Portugal iirc.
Straight swap and the difference is instant.
The engine is more responsive and smoother especially at low revs.
I have done a few things to my Griff but this is the best mod I have done.
I must add however that my injectors were the originals and although I had an engine rebuild recently the mileage on the injectors must be 100k.

[G5FTH]

FFG I don't know what you mean by your comment.
I bought refurbished units. They were stripped cleaned, new seals etc and flow matched to within a specific percentage.

I checked the fuel pressure prior to replacement and it was 3 bar. I know it should be 2.5 but it wasn't so I just replaced the injectors.

[G5FTH]

Steffo said:

"Cutting a long and painful story short" makes me really curious since I'm on the same route as you. I see that the Bosch injectors you chose are much easier to get at a reasonable price compared to the Vectra ones (Siemens 90501588), supposedly because they're wide spread in the US and used in lots of Ford applications.

The Bosch ones have a bit lower flow rate that the Siemens ones, but I guess (and hope) enough for a slightly tuned Griff 500 (ACT triple plenum, Stealth cam, MS2 injection/ignition).

By the way, could this be a trustable supplier if I choose the Vectra ones after all:
http://mrinjectoruk.co.uk/Vauxhall-Astra-Vectra-90...

The reason I say a long and painful story is that someone quoted a part number on here as a direct replacement, I bought them and the car ran like a bag of hammers. It turned out that the new ones had a flow rate of 370cc compared to the old ones at 200cc. I was flooding the engine with petrol. I returned those items, kicked myself for just ordering without investigating further and then spent hours on the net.
I finally ordered these:
http://www.ebay.co.uk/itm/131716409861?_trksid=p20...
Hopefully the link works. I spoke to the seller by email who had supplied these as an upgrade for the rover v8 in various cars.

Btw the new ones are 215cc IIRC at 3 bar so a slight nip of the regulator is required.

[G5FTH]

Argent said:

Surely a re-map?

A.

I would like to have the car remapped. I have made some enquiries but don't know of any rover v8 mapping experts nearby.
I want to improve the air intake and then I'll look into mapping again.

[G5FTH]

TV8 said:

Check the log files of rover guage to see if the existing map is going out of range during typical use. Assuming all else is well, that will tell you a lot. For remapping look up Jools on here. Very good and reasonably priced. He is in the middle of the country so not that far from most people.

Hi, I don't know how to check the files or what I am looking for. I have the Roverguage so I will look into it.
I will also look up Jools.
Thanks.

[G5FTH]

TV8 said:

You run the car with Roverguage connected and there is an option to log all of the data. Basically, you need to check the trim columns in the spreadsheet the log file creates. If it's is going regularly beyond or below 100% correction, then you need to find out why that is happening. If ignition etc are fine, then the amount of air and fuel is different to what the car is expecting in the map.

Do I drive the car with the roverguage connected for a while and under load?

[G5FTH]

Hi Everyone,
Just an update really.
I searched again for anyone relatively local to map the car to no avail.
This convinced me to spend the money on a Mark Adams Tornado Chip. I discussed the car with him and told him the changes made to the car.
This morning the chip arrived and I promptly fitted it.
I have been out on a short run with it this morning and my impression is that it is much smoother at lower revs, easier to drive at lower speeds and tick over is slightly lower too.
When I put the foot down I think it is a little quicker and so did my son in the passenger seat.
I am really happy with the chip and my opinion is that the increased smoothness and low end driveability was worth the money alone.