I have 165cc injectors (stock is 130) and the truck runs fine on the stock tune. I don't run it much that way, but it seemed to be fine the short while I did, and I didn't do all this stuff to my truck to run it in the stock tune anyhow...Im really impressed how much difference overall the small increase in nozzle size made to my truck. ~Brad

 

That was lucky, I know mine rode horrible while I was waiting for Matt get out my tunes with the injectors compensated for.

 

going with the performance stage 1, should i be getting the FASS 150 or will the 95 suit my needs and were do you find the FRR

thanks
Neverman

 

I agree, somewhat lucky. I would only imagine that as injectors get larger, the usability/driveability becomes less and less with an "unmodified" tune. Stock sucks anyway...

 

RR at ITP Diesel

 

ITP for the RR kit. I would do the FASS 150/180 just so that way you won't have to wonder if that will suit your needs or not. Be sure to tell them to send it with the 60 psi spring otherwise the best you'll get is the 50 psi one.

 

How hard is it to switch out the spring. Im not sure which one I have but if I have the 50 I would like to switch to the 60. I will ask the shop that installed it to see what I have, I remember the guy telling me he put in the best spring but he didn't say what psi.

 

Well, I switched it out before I put it all in, so it wasn't that hard. It might be a hair more cussing involved with it already in, but I don't think it would be too much harder for it if they mounted it where the installation manual suggested.

 

I recall reading somewhere that International recommends 70 psi for fuel pressure. It's supposed to provide better atomization and economy. I think it was in an article in Diesel Power but I'm not 100% on that...

Even though I have not done any engine mods yet(I don't count the Fluidampr or Power Elbow) I have been thinking about getting the EconoMax injectors somewhere down the road, among other things. I will be doing the ITP RR first though, that's for sure. Can it be set to regulate up to 70 psi when other mods are put in place?

Does the FASS replace the OEM pump? I've also seen the Air Dog which acts as a booster pump that feeds fuel to the OEM pump, IIRC. Would either system be able to supply fuel at 70 psi up to the RR fuel system? I'm trying to figure out my moves well in advance so I get it right the first time...

 

Yes the FASS does replace the stock pump or it can supplement the stock one, however I don't think they offer a 70 psi spring in order to handle that pressure at this time. I do believe that they are coming out with a bigger model then the one that I have, but when I don't know. If you run the RR with the FASS you actually have to set the RR 2 psi lower then the FASS in order to have some pressure returning for it to work properly.

 

If the RR is used with the stock pump it can adjust up to the pumps max of 65-70psi approx. The RR can only reduce the pumps max psi potential, not add, no matter what combination of pump/pumps you have. The 150/180 gave me 50psi out of the box. I changed the spring (took about 5 min, but I have lots of room with the dually fenderwell), and now have a consistent 58 psi. If I have the RR wide open, The FASS will pump 60 psi. Since the FASS should have a constant return flow of fuel to the tank, you need to reduce the fuel pressure on the FASS slightly, which is why I ended up with 58. What you end up with is two regulated systems acting as one. No matter how hard I push it, fuel pressure won't budge. with the stock pump on stock injectors, I sucked the fuel pressure down to damn near Zero psi. Unless you have a fuel pressure gauge you won't notice the fuel drop right away under load. It takes a few seconds to empty out the fuel rail enough to start coughing.

You can either keep the fuel pump (like adding a booster) with Some FASS or Airdogs, or keep a stand alone and replace the whole pump.

With the right spring, Im sure the FASS will give you whatever pressure you desire. Volume and pressure are a team. As long as you can maintain pressure under you rides max load, you should be fine. At 58 psi, mine won't budge.

~Brad

 

Thanks for your input. I understand that the FASS will return some fuel as will the Air Dog and that the RR needs to be set below the max pump output(shutoff head) pressure. In many systems when you place a booster pump before your main pump you can get better pressure and flow out of the main pump. I'm interested in higher fuel pressure to get better atomization which leads to better, more efficient combustion and hence better economy.

I've also read somewhere about an injector that has ten holes instead of the usual six holes. As I recall it was a high performance unit, but I'm wondering if that would work with the smaller volume 130 cc or 165cc injectors to improve atomization too. With the way fuel prices keep climbing it's costing me more to run the truck than it is to buy it which explains my focus on improving efficiency. I'm paying $120 a week on my loan and it cost me just shy of $150 for 34 gallons of fuel two days ago.....

 

So now i'll go with the FASS 150/180, the RR before ordering my injectors, installation doesn't seem to hard, going hate getting rid of my edge, Now is there a place in canada to order the FASS system, or which is the best sponsor to order from t that ships to canada

thanks
Neverman

 

The FASS system might be a little more tricky then you might think. I got all my stuff from Bean(he is a site sponsor and might be willing to send it to Canada). Also have you studded the head? I don't see that listed on your siggy and you might want to think about that if your going with bigger injectors as well.

 

Do you guys get a high idle with your injectors? Mine is high(coasting) untill I come to a complete stop. Also will high idle if I rev it in park, apply brakes and it drops to normal. When coasting to a stop do you guys get strange noise? Kinda sounds like a few cylinders drop out or shut off? This does not affect tach or make it run rough, just curious, my injectors are bigger 190s. Appreciate some feedback!!! Oh yeah, I believe that elite has recently changed to 8 or 10 hole injectors in pusuit of increased fuel economy. DJs Diesel fuel intensifier is supposedly o.k. for 190 injectors with stock pump. I see mine drop a little when it is first punched, but it picks back up almost instantly and stays good. He claims it is good up to 250cc injectors. My pump is going strong at 7,000 miles this way.