Brain Fart ? - Lean#6 RB26 Helper ?

[falcon]

I've seen a stock plenum make nearly 600whp with barely a lean condition in the 6th, which was tuned out just fine.

Car still runs strong (and has been for a while), and it actually gets driven... a lot.

[LIGHTSPD]

If this is an issue that scares you more than just trimming number 6 and 5. Use you extra analog inputs and mount 6 EGT sensors log and trim accordingly. I don't think AEM will do a comparisson between sensors and richen each individual cylinders otherwise you could set up a table to do that as well. Some of the better ECU's will do that. How many big HP cars are out there with simple trimming of the outers.

[JD74]

...and mount 6 EGT sensors log and trim accordingly.

Had already planned on it from the start.

Stupid threads like this are a way to think differently, not only to enhance my build, but just to get ideas out there. I am trying to do as much as I possibly can to stray from the 'cookie cutter' with a few of my choices, all the while heading in a safer direction.

I don't think AEM will do a comparisson between sensors and richen each individual cylinders.

It infact does have fuel control based on EGT, hence another one of the reasons I bought it.

Unfortunately, the AEM only has 4 EGT Controllers onboard (unless I buy 2 Gauge kits w/controllers, then 5v uplink the signals into spare inputs for all 6 Cylinders), so I am just going to tap Cylinders 1, 3 for reference, then 5, 6. Cylinders 2 & 4 will get their STATIC correction from the averaged outputs seen from 1 & 3 Sensors and Cylinders 5 & 6 will get their STATIC corrections according to the first 4 Cylinders.

Cylinders 5 & 6 will be the only ones that I will setup for dynamic corrections and again, will base them on the average values of the 1 & 3 reference.

By the time I am done, I will utilize about 99% of the features of the AEM and think it was the best choice for what I want to accomplish...SAFETY.

[LIGHTSPD]

Had already planned on it from the start.


By the time I am done, I will utilize about 99% of the features of the AEM and think it was the best choice for what I want to accomplish...SAFETY.

and have 100 extra pounds of sensors and wires LOl. Go to bed AL it is almost 2 AM in the morning LOL. You are a geek like me surfing the forums at 2 everyone else must be watching porn LOL

[JD74]

and have 100 extra pounds of sensors and wires LOl. Go to bed AL it is almost 2 AM in the morning LOL. You are a geek like me surfing the forums at 2 everyone else must be watching porn LOL

It's funny you mentioned that Cam.....(sensors).....as it's so true....lol

The cost will be a rude awakening....that's for sure.

To start with, those damn AEM EGT sensors are going to cost me $150+ USD each for each EGT Port that I want....lol

You are right about one more thing;

BED TIME.

[LIGHTSPD]

Don't get caught up in the AEM sensor game. They should publish what requirements they need so you could scale any good quality sensor. If they don't then it is just another AEM game of more money. A good quality EMS will let you scale an EGT input so many different sensor combinations can be used. Here is a link for the ones we are using on a drag bike powered by the VIPEC. http://www.exhaustgas.com/ProductDet...asketID=&RepID\
They specialize in exhaust metering.

Cheers Cam

[mcfly]

I've seen a stock plenum make nearly 600whp with barely a lean condition in the 6th, which was tuned out just fine.

Car still runs strong (and has been for a while), and it actually gets driven... a lot.

stock plenums have been used on 8 second skylines since the mid 90's:-D

[falcon]

stock plenums have been used on 8 second skylines since the mid 90's:-D

exactly. :-D


As "cookie cutter" it may be, if I was building an RB26 I would use tried tested and true methods to reach my goals. Rather than taking a chance on a new idea and having it backfire. In the end, HP is HP...

[Dragon Humper]

stock plenums have been used on 8 second skylines since the mid 90's:-D

Yessir....the HKS V-Max made 1200hp with a stock plenum, no ITB's, a Djetro Pro and a 90mm Infinity TB.

For a cheap piece of mind untill I get a stand alone I'm going to do a small cold start injector just ahead of the intake log and trigger it to come on at 10psi. That way if there is a small spike of air pressure at the back of the log in a weird multi throttle input situation there will be some extra fuel for any lean cyl. This will be on top of putting the richer of all the injectors in #6.

It's by no means acurate or high tech but will work well and is cheap as chips to do in the mean time.


Jon.

[JD74]

For a cheap piece of mind untill I get a stand alone I'm going to do a small cold start injector just ahead of the intake log and trigger it to come on at 10psi. That way if there is a small spike of air pressure at the back of the log in a weird multi throttle input situation there will be some extra fuel for any lean cyl. This will be on top of putting the richer of all the injectors in #6.

It's by no means acurate or high tech but will work well and is cheap as chips to do in the mean time.


Jon.

That's exactly what I was trying to get across.......

[NismoS-tune]

Why not just run your AFR in the 11s unlike Tomei, HKS or Mines in th 13-14s lol. You'll never go lean then

[LIGHTSPD]

Yessir....the HKS V-Max made 1200hp with a stock plenum, no ITB's, a Djetro Pro and a 90mm Infinity TB.

For a cheap piece of mind untill I get a stand alone I'm going to do a small cold start injector just ahead of the intake log and trigger it to come on at 10psi. That way if there is a small spike of air pressure at the back of the log in a weird multi throttle input situation there will be some extra fuel for any lean cyl. This will be on top of putting the richer of all the injectors in #6.

It's by no means acurate or high tech but will work well and is cheap as chips to do in the mean time.


Jon.

I personally think this will cause you more tuning issues than you could ever imagine. As a tuner this would be a nightmare solution. If you dump too much fuel you could blowout the flame front putting more unburnt fuel in the exhaust. Situation 2 is it doesn't flameout and burns proper making that one cylinder much richer. Either way your tuner is going to be reading the AFR's and confused. AFR are affected by one thing only and that is o2. The sensor doesn't know the differance between unburnt fuel and a lean mixture it only senses o2. Now your o2 is an average of all your cylinders so making one cylinder substantially richer makes your others leaner. As a tuner I quite often have to spend people's money to correct "funny ideas" people get on how to solve their problem when the solution is so simple. KISS is a good method in setting things up.

[Dragon Humper]

That's the beauty of being your own tuner. You already know what's going on in your own engine. For me it's just a stop-gap for now and will be used for Water/Meth in the future.


Jon.

[LIGHTSPD]

Yes this is true I quite often try things on my own rides I would never do on a clients.

[Angus]

water/meth

i was reading you guys talking about the two injectors before the intake manifold. On my car i have those but they arent used is it possible to use those for water/meth injection? or is it strickly to add more fuel?