Murray_Calavera
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Murray_Calavera last won the day on April 15
Murray_Calavera had the most liked content!
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Car(s)
33gtst, nb8a, boosted swift
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Rear suspension upgrades
Murray_Calavera replied to Sleepergm's topic in RB Series - R31, R32, R33, R34 (1986-2002)
Hmm I'm going to approach this from the other side... What is the car doing that you don't like or what would you like the car to do that is currently isn't doing (handling wise that is) -
Checked for spark? Checked for fuel?
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Rb26 expected power
Murray_Calavera replied to dodo1410's topic in RB Series - R31, R32, R33, R34 (1986-2002)
Any chance you know how much timing your running to make that power? Did your tuner say what the limitation was when they were tuning (eg knock? boost control issues? etc) And final thought, if you are able to easily source e85 where you live, I'd 100% recommend using it. But before you go back for the flex tune, you probably want to get some bigger injectors. On e85 I see you maxing out those 1050cc injectors real quick. -
RB25DE Rebuild tolerances
Murray_Calavera replied to MinKer's topic in RB Series - R31, R32, R33, R34 (1986-2002)
Workshop manual. -
MAP / fuel pressure typical delay times
Murray_Calavera replied to Murray_Calavera's topic in Forced Induction Performance
@MBS206 yeah it's a short run from battery in boot to pump -
MAP / fuel pressure typical delay times
Murray_Calavera replied to Murray_Calavera's topic in Forced Induction Performance
It's 12 gauge Tefzel wire. Should be right for 20 amps. I've clamped the fuel pump wiring, it measured around 20 amps. I can't remember the exact figure, I did it a while ago now, but it was around 20 amps. Still, lots of good info in this thread now. I'll keep investigating and post back with what ends up solving the voltage problem. -
It doesn't get tuned to handle the BOV as such, with an aftermarket ECU, you can use a MAP sensor instead of the MAF sensor. In short, the MAP sensor doesn't care about your atmo venting BOV and your mixtures will remain correct. An aftermarket ECU could choose to use a MAF sensor, but not many people do. I haven't used a MAF sensor in something like 20 years. They are a pain in the arse to mount correctly so that the air flows through the way the sensor wants it to (in your now custom intake to suit your bigger turbo etc), they are a restriction in the intake, they have limitations in the volume of air they can accurately measure, you can't use an atmo BOV as you've discovered, etc.
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MAP / fuel pressure typical delay times
Murray_Calavera replied to Murray_Calavera's topic in Forced Induction Performance
Yep, factory alternator. Fuel pump wiring isn't bad. Not perfect, but isn't bad. The gauge of wire has no issues supplying the 20 amps, the only issue is I'm using the factory connector in the fuel pump hanger which I'd be amazed if they are rated for 20 amps... but nothing has melted so far lol. It's also got the typical relay direct power from battery etc. -
Basically, yep. However I can't see you fouling plugs from that alone though (not enough time spent in the rich condition to do anything meaningful to the plugs). If I cast my mind back 15 or so years ago to the I last time I saw this actually happen in person, it just made the car really grumpy for a few seconds and nearly stall and only really had any effect at low speeds/low engine speeds. For sure this is the perfect excuse to get an ecu, delete the maf sensor and keep the bov lol.
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MAP / fuel pressure typical delay times
Murray_Calavera replied to Murray_Calavera's topic in Forced Induction Performance
Well, good news. The fuel pressure situation is a million times better. Please see attached dataz. @Dose Pipe Sutututu what battery voltage would you expect to be seeing? When I'm puttering around it floats between 12.8 to 13 volts and when punching through the hills its about 13 to 13.2 volts. Are these normal values? But yeah, I'm so glad I don't have to dig this fuel pump out again lol. -
Blowing Black Smoke On Boost
Murray_Calavera replied to GTR6's topic in Forced Induction Performance
I'd hate to think how many tables you'd need to have a constant perfect tune for all driving conditions without a wideband lol. -
MAP / fuel pressure typical delay times
Murray_Calavera replied to Murray_Calavera's topic in Forced Induction Performance
Should I be logging ecu voltage or battery? -
MAP / fuel pressure typical delay times
Murray_Calavera replied to Murray_Calavera's topic in Forced Induction Performance
I haven't logged any data yet, but I wanted to bounce this off everyone while I'm waiting to take the car out for a proper run. So the car was very hard to start this morning, finally fired and I took it to Supercheap to test the battery. Turns out the battery was low on voltage (can't remember the exact figure) and down about 250cca from where it should have been. Even though their simple battery tester said the battery was "fine, just needs a charge" they replaced it under warranty, pretty happy with that. Could a failing battery be the cause of the pump failing to keep up? The pump is pretty hungry, it pulls something like 20 amps from memory but I don't know how much this all matters when the car is actually up and running and the alternator is doing its thing.