I think he was talking about if the pressure was set to 58psi (stock) the idles for 80s wouldnt be as good as say you drop the base to 48psi.

But in vacuum the fuel pressure would be the base pressure set.

 

I thought the return system is a reference system... so how is the tuning different between a non return and return? They both have a base FP and a 1:1 rise...

 

On a 48 psi base, I was seeing around 36 psi under idle on my BRFPS

 

Alright good to know! Which regulator?

 

It was their old style, I bought it about a year ago.

 

hmmm. I never messed with the setting when I bought mine from a member on here. I believe I was at 42ish at idle when I last checked. So my base is right around stock? lol

 

I believe so. I raised the base pressure on mine to try to squeeze some more out of the 79# injectors I was running at the time on E85. It gave me a little more room, but sadly, not quite enough. So now I have the ID1000's.

 

Yes return or not they are both referenced. But I'm talking about the difference in the ifr table. Withing base pressure and ect.

 

Yah I will need to run larger than 80's when I go to 30psi... At 18 psi I am at about 75% I think and at 23 psi I am at around 89% I think.

 

Build thread?

 

My only thread was when I went twincharge I think, I scrapped that later on, and just went straight turbo.. Never looked back. My turbo was pushing I think 42-44lb/min at 23 psi.

Ok you were talking base pressure tuning not a difference in return vs non return tuning on a reference system?

 

Yes, but you can set the pressure the same with either setup.

 

If the pressure is the same, then there is no difference in the table.

FWIW, the factory setup is a return system. It just returns sooner. A lot of people refer to it as non-return, but that is obviously not correct.

 

Correcting mundo, I was working base pressures ..

 

Zzps fuel referenced systems are prob the best user friendly systems and good quality compared to most . most I have tuned were there kits. And I have done others and to install zzp is by far easier.

 

Do the zzp regulators come with a fuel pressure gauge out do you get a reading off the rail

 

ok, I just misunderstood what you were saying too.

I believe not, gotta get your own and hook it up to the schrader valve.

 

Base pressure is set with no vaccum present ?

 

Yes.

 

It's ok, I am retarded lol!!!!!

 

What do you mean by "Higher in flow"? Injectors or a different fuel system?

From my observations of this debate over the past fews years I have come to the following conclusions.

1. ZZP used to say that return style systems are useless but now offer them as an option on their site. They even offer the same Regulator as OTTP. Actually, right now, the site does not allow you buy the kit without a Fuel Lab regulator...

2. ZZP BRFPS (without the return setup) is good if you need just a little bit more fuel. Most people who need a lot more fuel and try to adjust the FP ending up breaking the adjustment screw/regulator. When they post for help with they end up getting scolded by ZZP for doing something they were not supposed to do. But ZZP always comes through to help them out. But first they make you look like an idiot! lol

3. I have not heard of anyone running a OTTP return style system ever complain about not having enough fuel. They can get it when they need it and not have to worry about breaking something in the kit.

4. Not to name drop but the person who made the most power with a TVS and E85 (and didn't blow his engine) was running the system from OTTP.

5. ZZP has gotten good results with their BRPFS buy turning up the FP when needed. IIRC, the first LSJ 2.3L stroker engine they built was running a M62, 60#, E85 and their BRFPS with the FP turned up to ~70psi. The made like 360whp with that setup. Their 2.4L LSJ stoker made over 400whp on the same setup but with 80# injectors.

6. As a "Return after the fuel rail option" Both kits are priced the same.

If I misspoke somewhere, please feel free to correct me.

 

Flow meaning larger injectors like ids 1000. Or setting a base pressure higher so you can get a little more

 

Why are the Injector Dynamics injectors referred to by CC and every other injector is referred to by #?

 

Zzp> ottp

 

Actually, quite a bit of what you said was mis-spoken.

1. We still sell the same type of kit that we always have. We still recommend the more simple kit for 99% of modders. We never said full length return kits are "useless." We stated that most people will not gain anything from them vs. our kit. We offer the full length return setup for custom race applications. If OTT is using the same regulator that we do, then they switched to that regulator after we started using them.

2. I have no idea where any of that is coming from.

3. Our kit does not add any kind of restriction to your fuel system, so that didn't make much sense.

4. We make hundreds more horsepower than that with our kit, so obviously the fuel regulator is not a factor.

5. See #4.

6. That could be correct.