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Do i really need a fuel regulator?

Remix-

By Remix-,
in Engines & Forced Induction

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BHDave Grand Master

BHDave

Posted
Posted

You don't really need to upgrade the reg. Generally they get used in combination with stock injectors to squeeze a bit more out of em. As you are upgrading your injectors then i think it's not really nescessary as your new injectors will be able to flow more than enough for your power goals without additional base fuel pressure.

omp Collaborator

omp

Posted
Posted

I have a set of RX7 (460cc) non turbo injectors in my RB20DET. The tuner said these are to big for my application. He told me he dropped 1msec on the injector cycle and the car wouldn't idle nicely. It is therefore running overly rich on idle and low revs. I am going back down to CA injectors (anywhere from 320cc-370cc dunno). Is this a wise move? They are bigger than stock so they should be able to support ok horsepower. I want at least 300rwhp(225rwkw). I have heard that the stock RB injectors with aftermarket reg and fuel pump can achieve 250rwkw. Oh yea I have a microtech LTX 12, bosch 040 and malpassi rising rate...thoughts?

Roy Grand Master

Roy

Posted
Posted

Big injectors and idle probs arent typically an injector problem, but the ability of the ECU to control the injectors.

I dont think the LTX12 should be having any trouble at all controlling 460cc injectors... they arent really that big.... perhaps the tuner is struggling with tuning the idle of the engine full stop and is looking for something to blame.... Id try another tuner to tweak the idle and uit should be fine.

Remix- Mentor

Remix-

Posted
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Posted

Hijack my thread!! hahaha

OMP, i would recommend you grab a second opinion from a well known import tuner in your area. As Roy stated, your LTX12 should have no dramas controlling the 460cc injectors provided it has been tuned correctly.

mist Community Regular

mist

Posted
Posted

I've got the SARD regulator with bigger injectors. Not running higher base pressure, but I like the peace of mind that I have a reliable fuel reg heheh. Dont think I need it tho, even on full song my injectors are still on holiday...

OMP- i'm running 550cc injectors on my RB20, ECU is AP Engineering PFC. Injectors have gone up just over 100%, but my tuner has done an awesome job with the staging, idle, etc - tuning work. Running a HKS GT2530 turbo, and I only run around 1 bar of boost so we're probably talking about a similar power range, tho I'm probably making less power heheh. I don't think they're too big - with careful tuning, even have excellent fuel economy!

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