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**BoostedFC** · 05-24-2011, 10:45 PM

Okay let's start here.

1. NA injectors are 460cc & Turbo II injectors are 550 so yes the are upgrades. You will need to increase the fuel to achieve power levels near your goal.

2. I would suggest doing the ECU & fuel upgrades at the same time.

3. Looking for a "CAI" well click the link. http://www.corksport.com/86-91-rx7/f...haust-systems/

**sidewaysFC** · 05-24-2011, 11:48 PM

so I should hold off on my fuel mods untile I do my ecu and when I do I should go with turbo injecters. and would a turbo fuel pump be good enough and hook up the same as the na pump.

**BoostedFC** · 05-25-2011, 03:35 AM

I would wait honestly. Well as for pumps why not just get a drop in Walboro 255lph or the new Aeromotive 340lph?
Yeah the Walbro can be found a lower cost & will work fine, but for the money the new Aeromotive Stealth is a damn good pump & will give plenty of room for big power later builds. The Stealth flows 30% more fuel then the Walbro 255 & more then the Bosch 44. The reason why I didn't include the Bosch is because they are generally used as an in line not in tank pump.

Walbro:http://www.injectedperformance.com/brand/walbro.html

Aeromotive:
http://www.shopatron.com/products/pr...AER11140/415.0

BTW the Toyota Supra TT OEM pumps & Mazda Cosmo TT OEM pumps can be used as upgrades. Supra = 260lph @ 12v & Cosmo = 250lph @ 12v

**sidewaysFC** · 05-25-2011, 08:37 PM

Okay I called Walbro about the fuel pump and they said that there universal high pressure gss341 should work and I forget what install kit they said would work.and since I'm putting hardend stationary gears and racing bearings in can I rev the engine higher safely.

**BoostedFC** · 05-25-2011, 10:32 PM

They will endure the stress of higher revving applications, so yes. The Walbro pump is decent pump for the price.

**sidewaysFC** · 05-26-2011, 12:10 AM

so how high should I be able to rev it safly so I can set my rev limiter on my apexi fc

**BoostedFC** · 05-26-2011, 03:09 AM

To my understanding the hardened gear & race bearings have been proven to over 10k, but there is no need to go that high if you are not making power in that range. Getting the car on a dyno to find where your power is will help you decide where to rev.

**sidewaysFC** · 05-26-2011, 03:49 AM

so if I wanted to I could go all the way to 10000 rpm thats awsom I would of never thought I could get that high with just hardend stationary gears and race bearings. hell if I can get it that high I mides well do a full exhaust port large street port and try and get it in the mid to high rpm range I cant waight to start this project