THE ROVER SD1 FORUM

jolyon39

Hi,

SD1 3500

I seek an early Federal Fuel Injection set up. This consists of the Plenum, Fuel rail, Manifold, Injectors and Air Flow Meter. the heads would be a nice touch but I can modify the existing ones.

I can wire it and add a modern computer if need be.

There is one post here of a guy trying to identify what he has on his car, I have emailed him already.

regards

Jolyon

_________________
Said to Winston Churchill by Lady Astor: Winstone, you're a disgusting drunk. Response from Churchill: Yes Lady Astor but your ugly and in the morning I will be sober.

Chris P

You could try Australia - SD1s there (I think from later series 1 onwards) also
had the Federal fuel-injection. Like this one:

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Any reason you are after a Federal plenum - it's not bad, but the later Vitesse
style plenum is freer breathing. Or is this for a kit car with restricted height - the
flat-top Federal plenum was originally designed for the TR8.

jolyon39 · Posted: Sat Jun 16, 2007 2:37 am Post subject: Reason for Federal Plenum

Hi,

You are correct, I have a TR7 that I want to convert to a TR8, this is what I want a Plenum for.

Making a rod for my own back in a way because I will have to have the manifold machined to take modern injectors and need to have the plenum point the other way. TR8's had their plenum pointing to the opposite side of the car when compared to the SD1.

I am also trying Australia but it takes time to locate.

regards,

Jolyon

_________________
Said to Winston Churchill by Lady Astor: Winstone, you're a disgusting drunk. Response from Churchill: Yes Lady Astor but your ugly and in the morning I will be sober.

Chris P · Posted: Sat Jun 16, 2007 7:23 pm Post subject: Re: Reason for Federal Plenum

jolyon39 wrote:

Hi,

You are correct, I have a TR7 that I want to convert to a TR8, this is what I want a Plenum for.

There was one on eBay UK a month or two back. It actually went
for quite a bit of cash - maybe £100. I can see it was probably
sold for a TR7->TR8 EFi conversion. I was tempted myself, to add
to bits of SD1 interest Smile

jolyon39 wrote:

Making a rod for my own back in a way because I will have to have the manifold machined to take modern injectors and need to have the plenum point the other way. TR8's had their plenum pointing to the opposite side of the car when compared to the SD1.

Wow, I didn't know that (TR8 plenum pointing to the right-hand side). Why
did they do that - or is the SD1 the wrong way around as it has to avoid
the battery on the right-hand side and that set-up stuck with Land Rover
and TVR???

jolyon39 · Posted: Tue Jul 10, 2007 12:39 am Post subject:

Thanks to all who have replied to me so far and the personal emails.

This project looks very easy now because you can throw away all the original Lucas sensors and install modern ones. It appears that it is relatively simple and can totally transform horsepower and miles per gallon.

Does anyone have the flow rates for the following Bosch injectors?

0-280-150-105 (Standard on the SD1 Rover with early plenum)

0-280-150-123 (meant to be the same dimensions and connection as above but higher flow rate)

I am also interested in the price of these in your countries. Here in New Zealand they are about US$170.00 each but in the US they are only $48.00 each.

_________________
Said to Winston Churchill by Lady Astor: Winstone, you're a disgusting drunk. Response from Churchill: Yes Lady Astor but your ugly and in the morning I will be sober.

Chris P · Posted: Tue Jul 10, 2007 11:29 am Post subject:

jolyon39 wrote:

This project looks very easy now because you can throw away all the original Lucas sensors and install modern ones. It appears that it is relatively simple and can totally transform horsepower and miles per gallon.

Hmmm, not sure how installing modern sensors or hotwire fuel-injection would totally
transform HP and MPG. The flapper EFi system is much maligned, but is pretty reliable
and economic.

jolyon39 · Posted: Tue Jul 10, 2007 12:05 pm Post subject:

Hi Chris,

I said that because I am converting a carburetted car to this system, Modern FI will change my carbed engine a lot.

I agree with you that the Bosch L-Jetronic sytem installed in early rovers was good and properly maintained it still runs the engine well. The only reason that it is mailigned is that it is old and has age related faults that are difficult to repair, flappers are hard to repair and not so many people know how to service them anyway. The ECU is also analogue and today there are vast improvements in electronics and computer programming compared to this 1980 ECU.

But surely you have to agree that more modern injection systems can manage an engine better eg a 4 wire Lamda sensor allows the ECU to fine tune as you run, a lot more effectively.

I plan to install a new throttle body on the original manifold with a modern TPI and modern sensors including a MAP sensor to control this engine. Hopefully this will also allow the engine to breath a lot easier through this rather small plenum. New or rebuilt Injectors will also help.

Once finished I will be happy to share my experiences with people. My guess is that we can improve these early engines without detracting from their original appearance. For instance, I will probably retain my flapper air flow meter for appearance only, internally it will be bored and sleeved as an air intake duct.

I am also quite excited by the idea that I can plug my laptop into the modern ECU at a club day and tweak the performance to match the day. Once the day is finished I can swiftly tell the ECU to run a standard programme for economy as I drive home.

_________________
Said to Winston Churchill by Lady Astor: Winstone, you're a disgusting drunk. Response from Churchill: Yes Lady Astor but your ugly and in the morning I will be sober.

Chris P · Posted: Tue Jul 10, 2007 2:21 pm Post subject:

jolyon39 wrote:

But surely you have to agree that more modern injection systems can manage an engine better eg a 4 wire Lamda sensor allows the ECU to fine tune as you run, a lot more effectively.

I plan to install a new throttle body on the original manifold with a modern TPI and modern sensors including a MAP sensor to control this engine. Hopefully this will also allow the engine to breath a lot easier through this rather small plenum. New or rebuilt Injectors will also help.

Ah, I see. I read the 'very easy' bit Wink

and assumed you were just changing the EFi
to hotwire and expecting twice the power *and* twice the MPG Rolling Eyes

It'd be fascinating to swap a stock flapper system on a 3.5 engine for a hotwire, a
megasquirt and then an all singing and dancing system with ignition control. Though
the flapper system is simple and modern systems are far more advanced, would
the fuel consumption drop significantly, particularly at a constant speed?

Keep us updated on the progress.

jolyon39 · Posted: Tue Jul 10, 2007 11:45 pm Post subject:

Grin, perhaps not so "easy" but more like I can see a logical sequence and this makes it both possible and sensible for me.

No need for either a flapper or Hotwire air flow meter at all though because the MAP sensor records both manifold and outside air pressure. The ECU can calc off these readings, it also quite comfortably allows the ECU to account for altitude variations in the mixture.

On Fuel economy, I believe that a modern Lambda probe and a MAP sensor allow for a far more accurate inforation flow to the ECU and therefore constant adjustment for economy. I am sure that this will give better economy than the older system. We will compare notes!

I am not planning to control ignition advance etc, well at least not at this stage.

This will take me three to four months I guess but it willl be fun. Hmm, maybe more than 4 months but it will be a good.

_________________
Said to Winston Churchill by Lady Astor: Winstone, you're a disgusting drunk. Response from Churchill: Yes Lady Astor but your ugly and in the morning I will be sober.