Fuel Leak !!!

Pic 1: Leaky injectors

Some time after my stage II mods, fuel smell inside the ER34 has become a norm. I took to it as nothing more than perhaps running a wee bit rich, hence the strong odour. Didn't really give much thought to it as I have a blocked nose most of the time. The little amount of passenger that the ER34 ferries would often comment on the strong odour whenever they board the car. I couldn't really be bothered because, well ..... fuel smells great to me! It's a natural high for us petrol heads. :P

What is getting a tad worrisome is that the smell is getting stronger, so much so that people standing outside of the car would get high and start doing the chicken dance. Ok I exaggerated a little bit here but you get the picture.

Pic 2: Can see the fuel stains

So anyway, I decided to take a look at what's happening under the hood. Using my nose like a blood hound, I sniff my way around the engine bay and it lead me to the centre of the engine bay. Lo and behold, those damn injectors are leaking fuel. All 6 injectors are leaking via cracked o-rings!

Pic 3: O-rings are indeed in a bad shape

Now this sucked big time, I was scratching my head on where to find replacement o-rings. Order from SARD? I bet it will be ridiculously priced! Luckily one of my contact knows where to get it and promptly ordered some for me locally. With the o-rings replaced, the injectors are back to normal and no more fuel leakage.

Pic 4: New o-rings were fitted and the injectors were mated back with the fuel rail


Pic 5: In goes the fuel rail and injectors

A quick check around the fuel lines also leads to another leak. The Tomei fuel pressure regulator is leaking where the fuel lines joins the fittings. A quick change of fuel lines and new banjo clips solved that pretty quickly. After the above drama, the ER34 is now back to normal and hey no more fuel smell! Woohoo!

Is that the end of the ordeal? Hardly unfortunately. Strangely enough, a week later when I started the ER34 in the noon for a lunch appointment with alvint, it reeks of even stronger fuel smell. This can't be right at all. Pop open the hood and tracing the fuel lines, I saw fuel literally dripping off from the fuel rail adapter plate. Oh man, I can't drive the ER34 with it leaking fuel like that, I might end up with a big bang and have a burnt wreck as a car after that!

Took out my tools and gave it a couple of quick turns to tighten the banjo clips. This will serve as a temporary measure while I drive out to my mechanic's place to get new fuel lines and also a new banjo clip. Problem has since been solved and the ER34 has been running fine for a couple of weeks now. Phew! Lucky that is solved finally!

Pic 6: The Tomei Fuel Pressure Regulator were also leaking

Sard 650cc Injectors

Pic 1: Sard 650cc injectors

As per my blog post about my Nismo 480cc injectors here and here, I need to upgrade to higher cc injectors as the ER34 is maxing out even on the Nismo injectors.

So what's out there that is available as direct plug and play with the ER34 OEM fuel rail? Blitz has a set that churns out 525cc while Sard makes a 650cc replacement. While having Blitz injectors may sound cool and all, but with just 45cc increment over the Nismo, it will definitely not cut it. So I guess the only option for me now is the Sard 650cc injectors.

Sard 650cc fuel injectors are top-feed, high impedance and an excellent upgrade if you have upgraded your turbine and are gunning for a bit more horses. The set of 6 injectors comes with bolts and spacers designed to use with the OEM fuel rails so it's just a simple case of taking out the old and putting these in. If you're wondering, these have a latency of 1.50msec.

Pic 2: Sard 650cc injectors

I might not need the full 650cc of flow but in the event that I do anymore upgrades in the future (which I have absolutely no plan :P), at least I do not have to worry about injector capacity again.

With these new injectors, the injector and latency correction in the Power PC will need to be adjusted as per below:-

New Injector Correction
Old Size / New Size X 100
370 / 650 = 0.569 X 100 = 56.9%

New Latency Correction
New Latency - Old Latency
1.5 - 0.528 = +9.72 msec

For Sale: Nismo 480cc injectors and ER34 370cc injectors

I am selling off two sets of fuel injectors. They are in perfect working condition and am selling them due to upgrades. The below are the details of the fuel injectors.

Please shoot me an email via eujin[at]hotmail[dot]com should you be interested in them. Thanks.

Pic 1: Nismo 480cc injectors


Pic 2: Nismo 480cc injector

Nismo 480cc injectors (16600-RR710)
Yes I've just got hold of these not too long ago and I'm selling them coz I need bigger injectors to support my mods. These have been in my car for like 2 weeks and would have traveled the distance of about tank of fuel. These are ideal upgrades for ER34, CPV35, C35, Z33, WGC34, and WGNC34.

Pic 3: ER34 370cc injectors


Pic 4: ER34 370cc injector

Stock ER34 injectors
These are the original 370cc ER34 injectors. They feature 4 spray nozzles per injector and are ideal upgrade for R32 GTS, Z33, etc...

Nismo 480cc injectors (16600-RR710)

Pic 1: Nismo 480cc injectors (16600-RR710)

As per my previous rant post here, the ER34 is maxing out it's stock 370cc injectors at around 5,000rpm. That is indeed not good at all.

There are a lot of choices for replacement out there from the ever popular SARD injectors of various cc to the offerings from HKS. There are also slightly cheaper alternative injectors from Deatschwerks that I have seriously considered some time ago.

Pic 2: Nismo 480cc injectors

Deatschwerks have a very competitively priced 440cc, 600cc and 800cc injectors for the ER34. In the end, I've decided on something "out of the ordinary". I opted for the Nismo 480cc injectors (Part No. 16600-RR710). Besides the ER34, these will also fit the CPV35, C35, Z33, WGC34, and WGNC34. If you're wondering, these retail for JPY13,500 per injector. Yes, it is costlier than the bigger cc SARD variety.

Pic 3: 4 hole spray pattern injectors

What is unique about these Nismo injectors is that instead of a single or dual spray nozzle, it has 4 spray nozzles per injector. Yeap, so in summary it is a top feed high impedance 4 hole spray pattern injector. As you can expect, with 4 sprays, you'll get very nice atomisation. These are pretty hard to come by. I've yet to know of anyone using these in Malaysia. Rare stuffs! :P

Why just 480cc and not go for higher cc injectors like the offering from SARD? Well I reckon I do not need such a high cc injector. It's good to have but afterall, my horsepower aspirations aren't that big. It's not, well, a GT-R so my power level will be pretty much conservative in a way. These should very well suffice for my needs. On the plus side, the uniqueness and exclusivity is great! These will fetch a darn good price in the market.

Hey, that gave me an idea! Should I sell these off and get bigger injectors from SARD? Hmmm ..... :P

Pic 4: Top view of Nismo 480cc injectors

Pic 5: Side view of Nismo 480cc injectors

Pic 6: Top view of Nismo 480cc injectors

Injectors oh injectors.....

Pic 1: Injectors galore!!!

Injectors are what feeds the engine with fuel. I've had in many instances just sat there thinking to myself do I really need bigger cc injectors for my ER34 project. I have a general idea of what I want to do with the RB25DET but the injectors are something I can't really decide and put my finger on.

The stock ER34 injectors have a volumetric flow rate of 370cc/min. That would means that it will flow fuel at 35.2lb/hour.

Assuming if one targets 420bhp out of the engine, looking at 0.5 Brake Specific Fuel Consumption (BSFC) and a maximum injector duty cycle of 98%, one would require injectors that flows 35.7lb/hr or 375cc/min.

That means that the stock injectors will only support 420bhp up to a safe level. Running 100% injector duty cycle is of course possible but will only support minute bhp gain, thus it would not be worth the risk.

Ideally I would love to have slightly bigger injectors to be on the safe side, perhaps a minimum of 440cc injectors whereby I can run at 90% injector duty cycle and it'll be extremely safe. OR I can go for even higher cc just in-case I struck Toto/4D and can splurge on the car. LOL :)

Btw, SARD only makes 650cc and 800cc top feed high impedance injectors for the ER34. Just in-case, you know .... you got itchy hands like me.

For Sale: SARD Fuel Rail and SARD 1,000cc Injectors

Pic 1: SARD fuel rail delivery pipe

I have for sale SARD fuel rail delivery pipe and SARD 1,000cc injectors (195500-3650).

The SARD fuel rail delivery pipe is made from aluminum with gold anodized finishing. The fuel delivery pipe provides an easier installation of larger volume injectors for high horsepower engine which requires an increase in fuel quantity.

Pic 2: SARD fuel rail delivery pipe

To complement the above, I've also SARD 1,000cc injectors (195500-3650) for sale. These are low impedance top-feed injectors. Great as replacement for factory RB26DETT 444cc injectors. The injector are made by DENSO for SARD thus the DENSO stamp on the injector body.

This combo is a must if you are aftering higher horse power. Will only sell as a set. Let me know if you are interested.

Pic 3: SARD 1,000cc injectors


Pic 4: SARD 1,000cc injector (195500-3650)


Pic 5: SARD fuel rail delivery pipe with SARD 1,000cc injectors


Pic 6: SARD fuel rail delivery pipe with SARD 1,000cc injectors