Sapphonica

Rick is in the process of rebuilding my l'il rotary.

It will now have 600cc RC Engineering injectors, a mild street port, and a beefier clutch.

Fortunately, I'm having someone with much clue working on my 8 this time, as opposed to ProStreet (pox be upon them).

Since I'm way broke, it looks like I'm stuck with the eManage for now. GReddy has a new injector dongle for the 'R' flash, so with any luck at all, I'll get more than 6100 miles out of this engine build.

MadDog

What does the new dongle do?

mike1324a

If you dont mind me asking, how much are you looking at for the rebuild minus the street port and how much with the porting added?

Moostafa29

My car is there right now as well. I got a chance to see your car with no engine or tranny, and all your parts sitting, waiting to be worked on. It was interesting to see everything bare boned. Rest assured, your car is in great hands.

Edit: Will the new injectors require a different fuel rail? If so, which are you using?

Xyntax

Nice! How long does this work take to complete? 600cc injectors? What was it stock?

Moostafa29

I think stock is like 380cc or 440cc.

Sapphonica

I'm into this for more than the turbo + install costs.

The 600cc injectors plug right into the stock fuel rail.

Hey Moostafa...saw your machine there too. Nice.

Petrus

Hey, what´s that about a 4:th(?) dongle from GReddy to "fix" the problems with the R-flash??? I spoke to Benny last week and he didn´t mention anything about it... I want more info on this!!!

Fanman

Stock injectors are 380cc

MadDog

^not all of them. I can't remeber the sizes, but the P1 and S injectors are one size, and the P2 injectors another - I think...

PUR NRG

Larger injector means more fuel flows through for a given load and duration correct? If that's the case then don't you have to remap the eManage to compensate?
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Fanman

You would never change out your primary 1 injectors (which by the way are 280 cc's). The primary 2 & secondaries are 380 cc's. You would change those out.

MadDog

how come?

Fanman

use of the injectors is based on rpm. The prmary 1's are used from idle to about WOT, but are maxed from about 3500 & up. The secondaries are responsible for much of the fuel delivery under load from 4800 rpm +, but seldom go beyond 60% of their capacity (normally). The primary 2's are brought online around 6250 rpm's & are hardly ever beyond 35% (this information is per Mazda Maniac - Give credit, where credit is due).

Where you are looking to where there is more requirement for fuel (at high boost levels) are the areas where the P2 & secondaries are opening up & putting in the fuel.

MadDog

Interesting that you would leave-in the injectors that are operating at maximum capacity and replace the ones running below max capacity with larger capacity injectors... sounds *** backwards to me. But, I guess that you need to have complete control over all the injectors to do it right. If you were running the emanage, it would make sense to replace the P2's with larger capacity injectors since GReddy has wired them for the subinjector control and is controling them directly. Then you could have much more fuel capacity under direct control. Perhaps you could even remove the S injectors from the equation all together.

rkostolni

I don't understand why your upgrading your injectors in the first place? It's not necessary at this point, the stock ones are good for up to 300hp at the wheels. I doubt, or at least hope, your not going to try for that with the emanage in control. I would recommend saving your money on the injectors and saving up for a new ecu. Injectors are fairly easy to replace and can be done at any time, you don't have to have the motor apart to replace them.

Moonrover333

ok ok ok what are the primary injectors size, and what are the secondary injectors size, whats p2 oh god i'm sooo confused help!!!!

MazdaManiac

iTrader: (3)

https://www.rx8club.com/showpost.php...91&postcount=1

Fanman

Remember those figures are only for a "regular" RX8. I'm sure a turbo car, where you are throwing in more fuel, those figures change. In terms of not swapping out the primary 1's it might have to do with the fact that you really don't need anymore capacity at low rpm, and don't know if it would affect drivability of the car off idle. The primary 2 & secondaries are the injectors that get most of the work when the revs go up (& consequently more boost).

Sapphonica

The 8 & I will be going north of 300 whp. Of course, the eManage won't be going there with us. Of course you don't have to have the engine out to pull & plug new injectors into the fuel rail.

They are a tiny fraction of the cost of a real engine management solution.

Also, someone else can verify that the stock injectors are 'good for 300hp at the wheels'. My days as a crash test dummy are over. If YOU want to push 300whp with stock injectors, go for it.

Sapphonica

Oh, I forgot to mention, I'm also getting the Racing Beat oil pump mod

zoomzoom_8

more on the mild street port, how much and fogive me for asking but if I street port mine, do I have to immeditely upgrade the ecu? I am still running the stock ecu and the emanage, wanted the interceptor but i have had two issues with the car that took that budget. thanks

zoomzoom_8

oh by the way, how did your 8 act when the engine went? i won't know for sure till tomorrow or tuesday if mine is really gone or a hellious vacuum leak but i think the apexs popped.

rkostolni

I've been told when you blow an apex seal you'll know it, its not a minor difference. What's wrong with it?

Sapphonica

When you blow an apex seal, the car barely runs, as in you need to rev it to 4k & dump the clutch in order to launch it, then keep the revs up so it keeps moving.

At idle, it runs like an old small-block V8 with a big cam...stutter-stutter-shudder-stutter-stutter-shudder-shudder-etc...lots of vibration and rough as hell.

Say, you wouldn't be running the 'R' flash, would you?

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You can use the eMangle, er, eManage with a ported engine, but it will need to be tuned.