What size injectors?

duncan · Post by **duncan** » Sun Nov 19, 2006 10:56 pm

Tony - I think that EFI101 will be running one over here early next year. I am up for it - would be good to have familiar company.

TonyB · Post by **TonyB** » Sun Nov 19, 2006 11:00 pm

Let me know when they announce dates Dunc. If I have not completed a good map, or feel I still have gaps in my basic knowledge, I may tag along. Maybe we could get a discount if we get a few names together, oh and we could arange an advanced day at Clives ;-)

duncan · Post by **duncan** » Sun Nov 19, 2006 11:16 pm

Will do Tony.

stockcar · Post by **stockcar** » Mon Nov 20, 2006 8:45 am

would NEVER fit a 'rising rate' fuel reg to a turbo car particuarly on management or mapped.................totally throws out your fuelling calibrations because it is non-linear...........

all FPR's (even std) increase pressure with boost

a good quality Fuelab, SX, etc. will cope with up to around 7BAR total pressure (i.e. if base pressure is 3BAR and you run 2BAR boost then you are running 5BAR at WOT)...............

duncan · Post by **duncan** » Mon Nov 20, 2006 8:54 am

stockcar wrote:would NEVER fit a 'rising rate' fuel reg to a turbo car particuarly on management or mapped.................totally throws out your fuelling calibrations because it is non-linear...........

all FPR's (even std) increase pressure with boost

a good quality Fuelab, SX, etc. will cope with up to around 7BAR total pressure (i.e. if base pressure is 3BAR and you run 2BAR boost then you are running 5BAR at WOT)...............

Thanks Alyn - that makes sense.

Any views on the Aeromotive FPR?

btw where is the FPR in the car?

stockcar · Post by **stockcar** » Mon Nov 20, 2006 8:23 pm

never used or no anyone thats had an Aeromotive..............sorry

the reg on your car will be either on the O/S/F of the inlet manifold on the front of the injector rail or on the back of the N/S/F rail just near the fuel filter (some odd ball import cars have them here, not sure if 06 has copied this yet??).............

duncan · Post by **duncan** » Mon Nov 20, 2006 8:51 pm

stockcar wrote:never used or no anyone thats had an Aeromotive..............sorry

the reg on your car will be either on the O/S/F of the inlet manifold on the front of the injector rail or on the back of the N/S/F rail just near the fuel filter (some odd ball import cars have them here, not sure if 06 has copied this yet??).............

thanks Alyn - will have a getting to know my FRP session tomorrow

benh · Post by **benh** » Sat Nov 25, 2006 10:03 pm

Aeromotive FPR's are in general very good bits of kit.

Be Sure to get a 1:1 ratio though to ensure the pressure differential of the fuel rail to the manifold remains the same. Also its worth getting an FPR with propper pipe fittings- not the push on + jubilee clip types. You ideally want nice AN fittings and lines.

I recently fitted a kinsler fuel pressure reg for the first time and it seems very very good quality, with twin entry ports, so ideal for a scoob or anything with a V engine. Even the return line was an AN fitment.

Cheers,

Ben.

hybrid dreams · Post by **hybrid dreams** » Sun Nov 26, 2006 2:26 pm

i run the aeromotive 1:1 fuel pressure regulator. I have no issues with it whatsoever. good regulator.

L6GSR/Liam...

your calculations for BSFC is different than mine for some reason. by your estimations I should be running over 400bhp on my car. I am running 510CC injectors at 100% DC running at 44psi static (3 bar). I am running 1.3 bar on standard turbo. And if we all know anything I aint over 400 bhp. I can promise you that. More like 340-350. Should never size your injectors to 100% anyways. Injectors....especially pintle style injectors have issues with functioning properly on high DC. Also scoobs need to run extra rich to avoid detonation as they are very prone to it. So a BSFC of .60 and 85%DC is probably a better choice for the scoobs IMO.

I like this worksheet....

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

Also it took me about 30 minutes to fit my walboro. Hmm should have bought an evo 3 :P I can access my pump with the tank up. and the hard lines just need a little lovin to get the lid off

stockcar...

why would you not fit a "rising rate" FPR? because its funny the stock regulators are just that (atleast in mitsu land it is)... and how are they not linear? 1psi of fuel pressure for 1 psi of boost for the rising rates. sounds linear to me? I run the aeromotive unit..which is a rising rate. and it works just fine. no issues.

stockcar · Post by **stockcar** » Sun Nov 26, 2006 5:56 pm

hybrid dreams wrote:stockcar...

why would you not fit a "rising rate" FPR? because its funny the stock regulators are just that (atleast in mitsu land it is)... and how are they not linear? 1psi of fuel pressure for 1 psi of boost for the rising rates. sounds linear to me? I run the aeromotive unit..which is a rising rate. and it works just fine. no issues.

think your slightly misled....hope this clears things up

any regulator that is described as a "1 to 1" is linear in operation, never come across any std O.E. fit that is anything but this in operation...................so our example vehicle is set to 3BAR idle pressure and at 1BAR of boost, fuel pressure will rise to 4BAR

"rising rate" when attatched to aftermarket regs is used to describe NON linear fuel regs, these use a different ratio to achieve an increased fuel pressure as the boost/revs rise (as an example the likes of the FSE type 'rising rate' regs use 1.7 to 1 as a fuel ratio, therefore if set up to idle at 3BAR will actually produce 5.1BAR fuel pressure at 1BAR of boost!!)
** be aware that FSE (as most others) also do 1.1 fuel regs so you need to know what you are being supplied