Modifications to my V70 T5...

[pyaap]

Hi Alastair and Dan,

Just thought I'd post up some links with injector calculators. These are only 2 examples from leading injector manufacturers in the USA but you will find that they correlate with the others out there:

http://www.rceng.com/technical.htm#WORKSHEET

http://www.injector.com/injectorselection.php

Information on the various variables are explained on the websites. These 'calculators' are designed to give you injector flow rates which will efficiently and safely produce the desired horsepower.

[Dan F]

Hi Pyapp.

Useful calculators, and as I see it it would be prudent to change my injectors for higher flowing ones if I fit a 19T (or similiar). After all Volvo themselves fit the green injectors to the V70R AWD which is a 2.4 265 BHP engine. If the blue ones were adequate then surely they would use those?

Cheers,
Dan.

>Hi Alastair and Dan,
>
>Just thought I'd post up some links with injector calculators.
> These are only 2 examples from leading injector manufacturers
>in the USA but you will find that they correlate with the
>others out there:
>
>http://www.rceng.com/technical.htm#WORKSHEET
>
>http://www.injector.com/injectorselection.php
>
>Information on the various variables are explained on the
>websites. These 'calculators' are designed to give you
>injector flow rates which will efficiently and safely produce
>the desired horsepower.

I may be doing something wrong, but if you enter the data in these for a stock C70 T5 like Dan has, the stock injectors would not be adequate for 240 bhp.

Adam.

[Dan F]

Hi Adam.

So what are the flow rates on the Volvo injectors?
Why do Volvo fit green injectors to a 265BHP car if the blue ones are apparently more than fine for 310BHP+?

I read somewhere the cc/min rates for the different colour injectors (orange, white, blue and green) but cannot find the info again, someone out there must have this info.....
Indeed, surely all tuners should have this info or they wouldn't be able to reliably tune any ECUs.....

Later,
Dan.

[pyaap]

Hi Adam,

For Dan's T5, are you referring to the stock Bosch 'White' injector, part number 0280155766 and if so, what flow rate do you make them out to be? If its any other stock Volvo injector, can you again let me know what type of injector it is and its flow rate? Thnx.

[Dan F]

My injectors are blue. Higher flowing than the white ones I believe.

Later,
Dan.

[Dan F]

Hi.
My injectors are blue. Higher flowing than the white ones I believe.

Later,
Dan.

EDIT: Don't know what happened there....... lol.

[pyaap]

Hi Dan,

Looks like your keyboard is possessed! :-)
Thanks for the info. The blues are higher flow I think (aren't they fitted to the 265bhp R AWD cars?) but I'll wait for Adam to confirm the details of the flow rate as I'm sure he knows.

350 CC (MY1997 + R's)
395 CC (MY2000+ T5's)

Now if you put either of these into the equation on the web site, the injectors are still inadequate. Perhaps the 395 cc you could just about get away with for a 250 bhp T5, but only just, according to these online converters. Certainly on the 850R, it would be no-where near adequate for a stock 250 bhp according to these web sites.

So, this leads to several questions -

1. If, according to the web site, the stock injector is totally inadequate for a stock motor, are Volvo wrong or is the calculation on the web site wrong?

2. If you upgrade to 280 bhp with TME or 310 bhp with RICA with just an ECU upgrade, how on earth would that be possible on the stock injectors if this online calculator was correct?

3. Does theory and practise always agree?

4. Given that 80% duty cycle is a *SAFE* max for an injector, for how long would you need to drive the car at max power before the injector would fail? I cannot find any stretch of road in Europe where this would be possible. In fact, Volvo recently did an endurance record with a T5 and managed something like 24 hours flat out. Now, if the online injector calculator is correct, the injectors would be running at about 80% duty cycle - for 24 hours!!!!! So again, either this online injector calculator is wrong, or you can run 80% duty cycle perfectly safetly. Which one is it?

Adam.

[pyaap]

>350 CC (MY1997 + R's)
>395 CC (MY2000+ T5's)
>
>Now if you put either of these into the equation on the web
>site, the injectors are still inadequate. Perhaps the 395 cc
>you could just about get away with for a 250 bhp T5, but only
>just, according to these online converters. Certainly on the
>850R, it would be no-where near adequate for a stock 250 bhp
>according to these web sites.
>
>So, this leads to several questions -
>
>1. If, according to the web site, the stock injector is
>totally inadequate for a stock motor, are Volvo wrong or is
>the calculation on the web site wrong?
>
>2. If you upgrade to 280 bhp with TME or 310 bhp with RICA
>with just an ECU upgrade, how on earth would that be possible
>on the stock injectors if this online calculator was correct?
>
>3. Does theory and practise always agree?
>
>4. Given that 80% duty cycle is a *SAFE* max for an injector,
>for how long would you need to drive the car at max power
>before the injector would fail? I cannot find any stretch of
>road in Europe where this would be possible. In fact, Volvo
>recently did an endurance record with a T5 and managed
>something like 24 hours flat out. Now, if the online injector
>calculator is correct, the injectors would be running at about
>80% duty cycle - for 24 hours!!!!! So again, either this
>online injector calculator is wrong, or you can run 80% duty
>cycle perfectly safetly. Which one is it?
>
>Adam.

Hi Adam,

In response to your questions:

1. In my opinion, neither Volvo nor the website got it wrong. What figures did you use to calculate the flow rates and what figures did you arrive at?

2. Refer to the above.

3. I think both have to work hand-in-hand, afterall no one has proven Newton wrong yet! I'm sure there are laws that govern combustion too.

4. I'm perplexed because I never stipulated that 80% was the 'safe' maximum for an injector, just that this is what is commonly recommended, by manufacturers, for optimum operation. It must be possible to run an injector at a higher duty cycle but you are the one to advise me on that since you regularly tune / remap cars.

I assume that it is essential run duty cycles higher than 80% in the 350bhp / 19T cars with stock injectors so there is no doubt that it can be done; have you had a chance to have a think about what those figures are like?

Thnx.