Yo. Another bump. Need a mirror. I haven't seen this video and would be really grateful if someone could point us to it. Thanks guys.

 

quote off of svt forums: Call me stupid but how do you dyno a fekin AWD car?

ROFL

 

We had a problem with out website but the site is back up and the link is up too.

-Martin

 

It's called the Norris Designs EVO 7 Demo car.

807 Hp & 647Lbft (2.2 Bar)
0-60Mph - 2.79 So Far (Road Tyres)

http://web.norrisdesigns.com/Feature...t=1&id=1&cid=0

Have a nice day

 

That Norris Designs Evo 7 is twisted...seriously demented...completely beyond the realm of what is rational. OMFG that thing is built. what's up with dual fuel injectors...never heard of doing that.

 

It dosnt look that fast because they are using handi-cam camera its always like that - they should bring the car to the track again shoot some videos and post it there to prove it with dyno sheet...

 

Uhm.... it's called SARCASIM!

I know all about their Evo 7 thanks.

Have an even nicer day

 

The twin injector thing is a good idea and used a lot in high out put N/A cars over here. It enables 2 things. First you have a MUCH grater fuel flow without the down sized of huge injectors. Secondly, the second set of injectors is better placed to let the fuel “mix” with the air, thus giving you a more effective burn in the cylinders (and more power). I don’t know how Norris has his set up, but most twin injector sets work with the inner working until a set rpm/psi then the outer set start to flow. On some N/A cars over here they actually switch between backs depending on the rpm. Low rpm inner injectors, high rpm outer.

Thanks Chris

 

 

Thanks Chris, much appreciated info on the dual injectors. Sounds like a great idea and makes sense that you'd get better mixing. I think I might have to have fuel, fuel, water, NO2 injectors in series That would be really trick. Anyone know if AEM EMS can run a dual injector set-up like that with alternation between them based on RPM and then both pumping at really high-demand?

 

is a second set really neccesary? are four large injectors not enough to keep up with the fuel demand on high hp 4 cyl engines?

 

It's enough, no doubt...especially since you can run huge injectors if you want to. But imagine how much more homoginization (better mixing) you get with one fine mist spray mixing with the intake air, then another...rather than a single injector which can only make so many fine particles before they start clumping into larger droplets at high flow. I think the dual injector setup makes intuitive sense. Plus, at low flow, I'm guessing (and really, I'm just guessing) that the mist is finer and better dispersed with the smaller injector size.

 

You are right. After all you do get a better idle on stock injectors than what you get on 1000cc + ones. There were few other things I forgot to mention about twin set ups. First, on very high rpm applications (like bike engines and some very high revving car units) you can get to the point where the injectors are big enough to supply the flow but take too long to open and close to have a useful amount of time to inject the fuel. So by using 2 sets of smaller injectors that can operate at higher speeds, you can match the flow rate of the larger set, even at the high rpm. The other point was that (again on bike engines) I think some people use “pulse injection”. This is when a small injector will fire twice in one cycle (once when the inlet valve is closed and once as normal). This means that you can have a single small injector that has the same “pulse” flow rate of a much larger injector. I haven’t seen any of these injectors, and I think they are more for the biking world but they may work on a car application to!

I don’t know anything about the AEM EMS, but I know that a lot of the standalones do have fertilities to accommodate multiple injectors per cylinder. I think there are ways around it though. If you amplified the signal so it was twice the strength, and then split it, you could run 2 injectors off one signal. You would have to run both injectors at once so the pulse that the ECU sent out would have to be halved (if that makes sense) to accommodate for the second injectors flow. I would check with the manufacture to see what it can do. I know that the MoTec can and I think that the Gems can to (both popular over here).

Hope this helps Chris.

 

Yeah, that helps me to understand it better. I'm going to look into doing this if the AEM can do it. And I do understand the doubling the signal and splitting it thing, but it seems that wouldn't be ideal for timing the injectors...unless they were mounted like rabbit ears, parallel, in the intake.

 

Good point. I forgot about the injector timing. You could mount the injectors side by side (they did on the Cosworth RS500s) but again that’s not ideal as you affectively making one large injector from 2 small ones. You may as well use a larger one. I have just re-read an earlier post about the injectors you would put in the manifold (you said fuel, fuel, water, N2O I think). That would make for one VERY intricate inlet manifold hehe! You don’t need to mount the H2O injector/s in the manifold as there is little chance that the water will evaporate before it gets into the cylinders anyway. I think I heard 6” from the throttle body was ok but I think anywhere after intercooler will do! On the N2O you could use direct port or you could inject it in a similar place to the water. This would reduce the effect of the N2O (it will have evaporated by the time it gets to the head) as a power builder, but (for both N2O and H2O) the further away they are the better cooling you get and thus more power! It is up to you. Good luck with the AEM unit and I hope it cope with multiple injectors. Chris