question on the fuel system in regards to boost

[Dark_Rider2k3]

I've been hearing conflicting information about what to get for the fuel system. Mainly regarding the need for an adjustable fuel pressure regulator.

First off, my goal for the car is around 230 horsepower. The engine is from an EGT and does have (though not installed yet) the MBSP.

So my question is mainly.. do I need to do any upgrading to the fuel rail/FPR. Is there a need for an adjustable FPR if I am going to be using megasquirt?

I was told conflicting information.. some tell me that it's needed, and others tell me that it's not.. that the stock fuel rail/fpr is fine as long as you have proper injectors, fuel pump, and engine management.

Thanks everyone!!!

[MD323]

no need for a AFPR if your using megasquirt and bigger injectors

if your using stock injectors and MS (not recommended for those power levels) then you would need a AFPR

stock fuel rail will handle 300+ hp

[Dark_Rider2k3]

no need for a AFPR if your using megasquirt and bigger injectors

if your using stock injectors and MS (not recommended for those power levels) then you would need a AFPR

stock fuel rail will handle 300+ hp

okay this makes sense!

Looks like I am saving up for megasquirt next!

[yunvmyegt]

i dunno about 300hp, but some guys on mt tested a stock miata rail with somethng like 1000cc's and never ran out of fuel due to the rail on whatever they used a bosch or walbro pump.... its more for looks, and a security blanket....lol... mine should be done soon....lol...

[cee1481]

i made 300 whp on a stock fuel rail no fpr and problem free on 93 octane... I had rx-7 440cc injectors, walbro 255 pump, and a EMS STINGER ecu. this is something I done not heard, You should have no problem reaching your goal.

[Dark_Rider2k3]

now that's awesome to hear! =)

What year RX-7 are those injectors from btw? I'm going to the junkyard soon and i'll check for 'em.

[cee1481]

turbo II... i can't remember if there the primery or secondarys... they are a burgandy red and each 13b only carries 2... so you would need 2 donor cars. look on ebay too.

[Dark_Rider2k3]

i see ebay selling 1600cc red injectors.. those right?

http://cgi.ebay.com/ebaymotors/RC-1600cc-Fuel-Injectors-Mazda-RX7-FC3S-13B-20B-REW-NEW-_W0QQcmdZViewItemQQfitsZModelQ3aRXQ2d7Q7cSubmodelQ3aTurboQQhashZitem4aa9e3d9b2QQitemZ320677861810QQptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccessories

[1Mazda323Fan]

1600s are probably way too much for what you're doing. Try to find the 440s that were mentioned previously.

[Turpro]

The red top 460cc rx7 non-turbo injectors(denso part number 199550-2010) are plug and play with the bg harness and can be found in 1 car. Secondary injectors are a pain in the ass to get to but they're the same

[theredrocket]

i made 300 whp on a stock fuel rail no fpr and problem free on 93 octane... I had rx-7 440cc injectors, walbro 255 pump, and a EMS STINGER ecu. this is something I done not heard, You should have no problem reaching your goal.

You made 300whp on 440cc injectors? That is impressive. My RX-7 injectors were maxed out at around 270whp.

[jinx]

i dunno about 300hp

Lowkeygt and his friend 94gtmayhem made well over 300hp on the stock fuel rails no problem.

[cee1481]

The red top 460cc rx7 non-turbo injectors(denso part number 199550-2010) are plug and play with the bg harness and can be found in 1 car. Secondary injectors are a pain in the ass to get to but they're the same

thanks... i didnt know the non turbo rx7's had them too and always thought it was one or the other.