Just wondering what's the difference between a double rising rate fuel regulator & a standard rising rate fuel regulator. Also what does it mean when it says 1.7:1 - 0.7:1 - 1:1 I was going to buy one of these. But unsure which one. http://www.tweakit.net/shop/index.ph...a&filter_id=14 (http://www.tweakit.net/shop/index.php?cPath=57_40_44&sort=2a&filter_id=14)

The ratio is fuel pressure v's inlet manifold pressure/vacuum. e.g. If the base pressure is set at 45psi (0psi inlet manifold pressure) then a 1.7:1 reg will give 62psi fuel pressure @ 10psi boost (45 + (10 x 1.7)) The factory reg is a 1:1 ratio and IMO is all you need. The only reason you would choose a different ratio is if you were trying to squeeze more fuel through maxed out injectors, and even then you would still need to re map the ecu.

Thanks MonstaS4. I have a Bosch 044 and was reading that it can flow up to 72.5psi. I was needing around 87psi. So would a 1.7:1 fuel regulator work. Would that bring the fuel pressure up to 87psi?

Quote: Originally Posted by HTURBO [View Post] Thanks MonstaS4. I have a Bosch 044 and was reading that it can flow up to 72.5psi. I was needing around 87psi. So would a 1.7:1 fuel regulator work. Would that bring the fuel pressure up to 87psi? why do you want 87 psi fuel pressure? thats rediculous.

Exactly ^^. Please explain what you are trying to achieve.

I think he's confused flow (LPH) with rail pressure (PSI).

Well I found some information about the deka 610cc injectors. Flow information Siemens deka 610cc injectors flow at(static flow rate) 60lbs/hr(630cc) at 43 psi & 85lbs/hr(892.5cc) at 87 psi Is static flow rate in conjunction with duty cycle?

Ummm from memory there are two factory fuel rail pressures: Ford and everyone else. I think? I know there's a difference between Ford and Holden though. Ahh, might let someone else answer, I'm not sure!

Bosch 044 maximum flow is 72.5 psi. If I could use a 1.7:1 ratio fuel regulator I could bump up the pressure to 87psi???

I'm still not sure why you would do this?? Increasing fuel pressure will give you more flow per injector pulse, but at the same time, the pumps flow capacity drops off. Your statement above is incorrect. An 044 is rated to 72psi, but its flowrate is lower at this point than at say 45psi. Again...what are you trying to achieve?? Are your current injectors maxed out?

Quote: Originally Posted by HTURBO [View Post] Bosch 044 maximum flow is 72.5 psi. If I could use a 1.7:1 ratio fuel regulator I could bump up the pressure to 87psi??? do it the wright way and just buy bigger injectors

I see what your trying to say but you are a little confused. The Fuel Pressure Regulator (FPR) doesn't increase the ability of the fuel pump to pump higher pressure. It just regulates the output of the pump to deliver a static pressure to the injector. Pump flow vs pressure, the higher the flow the lower the pressure capabilite of the pump. Essentilly all pressure is, is a measurement of resistance to flow. Once the capabilities of the pumps internals are met, you loose flow or the ability to gain in pressure. IMHO you are modding your fuel system for all the wrong reasons. You cannot skimp of fuel delivery.. ever. How much power do you want to make and I will put together an idea of what you need so that it will run safely day in day out without worry.

Your right Duke57TT, Instead of doing to things the cheap way I should just buy bigger injectors. The reason for asking is because AVO will have to ballast my injectors. I was going to buy some 1000cc Rochester injectors (low impedence), I would have to ballast the injectors because the LINK G3 will only support high impedance injectors. Low impedence injectors they have better idling characteristics anyway. Should be better with a larger cam. Quote from AVO:- We can ballast the injectors so you can run the low impedence injectors. It would cost $220.00 for the wiring side of it plus $110.00 for the mounting of the ballast resistors on a plate. To retune the vehicle with a cam and bigger injectors it would cost $500.00. Also we'll reset your rev limiter.

You can get 80LB high impedance.. Would smoke 400rwkw in.. You can get 2200cc high impedance if you want. Though that large an injector running pump fuel makes them hard to get to idle. Running meth they are ok. Another option is an injector driver.. alot of LS guys use them to run low impedance injectors. One of the guys is selling 1000cc Rochesters at the moment if you go the low impedance route. I think he only wanted $450 for them or something.

hi is there a difference between the n/a and turbo fuel regulators?

You will have no fuel volume running 044's around 70psi, bad idea I'd follow duke or your next thread will be what pistons to buy cause I melted mine

Way to bump a 2 year old thread LOL.

Lol I didn't notice that

Quote: Originally Posted by RB2GO [View Post] Lol I didn't notice that Hahaha, not your fault, studio54 (http://www.calaisturbo.com.au/member.php?u=33165) bump it asking if there a difference between the n/a and turbo fuel regulators? Difference is the VL turbo reg raises fuel pressure under boost. the N/A one doesn't. I think LOL. It been that long since I owned one. I'm using a Monza rising rate fuel regulator.