What extra guages would u swappers add!!!

Discuss the RB20, RB25 and RB26 series engines.
kevy8up
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ONLY swapped ppl answer...cause the guys with the RB20s and RB25's know what they wish they could see now that they have been driving them for awhile.


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wga240
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When I did my swap, I only had enough money for an Air/Fuel gauge and a boost gauge. However I wish I saved up and bought an oil temp gauge and a water temp gauge. I don't really trust the stock temperature gauge, and I really wish I had some way of making sure my oil pressure was ok. At a minimum I recommend everyone buy at least 3 of these, with the water temp gauge being the optional one.

I also wish that instead of an air/fuel gauge I saved up money for a wideband lambda meter setup to tell me my exact a/f ratio. There are some reasonably priced kits out there that I plan to get in the future, but it would be very nice to have from the start. However this is just a nice tuning tool that allows you to tune off the dyno. It's by no means something I'd consider necessary :)

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JonPowell
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I wish I had the EGT and a mechanical boost gauge...Oil press and water temp I was fine with stock. I personally dont see any point to an air/fuel gauge...you can tell everything with the EGT, but that is just my opinion. Some people swear by them, but I just dont really see much point...I hope I dont offend anyone.

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NISMO_RB25
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My RB25 doesn't work correctly with the KA speedo ant tach. I ended up buying an Apexi Rev Speed Meter. Unfortunately it only displays in Kilometers, so depending on your install you may want to plan on getting a new speedo and tach, or using the RB's cluster. You can adjust the KA's Tach to get close to correct, but the speedo didn't have enough adjustment.

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PROJECTRB240SX
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I WOULD GET A OIL PRESSURE AND TEMP GAUGE. THE OIL PRESSURE LIGHT ONLY COMES ON AT 5PSI OR LESS (THIS MEANS CATASTROPHIC ENGINE FAILURE). THE REASON FOR THE TEMP GAUGE IS TO MONITOR TURBO OIL HEAT STRESS, I WOULD ALSO INVEST IN A AFTER TURBO OIL COOLER BEFORE RETURNING IT TO THE ENGINE.

A GOOD WATER TEMP GAUGE WOULD ALSO BE USEFUL TO DETERMINE HOW HOT THE ENGINE IS REALLY RUNNING. FUEL PRESUURE GAUGE WOULD BE GOOD BUT NOT ESSENTIAL.

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JonPowell
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I was gonna use the trans oil cooler off my clip for the after turbo oil cooler, just never got to it.

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PROJECTRB240SX
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IT SHOULD BE ONE OF THE FIRST THINGS YOU INVEST IN WHEN YOU UPGRADE YOUR TURBO OR ENGINE.

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NISMO_RB25
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are they apexi?

Frank@MVP
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Projectrb, are you talking about an oil cooler immediately after the turbo and before the oil goes back into the pan?

There is no, or shouldn't be any, oil pressure immediately post-turbo. It should have a free-fall into the oil-pan if possible. Running the post turbo oil through a cooler before returning it to the block would starve the turbo of oil (due to the fact that the difference in oil pressure before and after the turbo would be much less and the oil would back up in the turbo), wouldn't it?

Why wouldn't you go the easy way and run the cooler off of the oil-filter location?

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PROJECTRB240SX
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YES, I'M TALKING ABOUT IMMEDIATELY AFTER THE TURBO.... WITH A SECONDARY PUMP TO KEEP IT MOVING. YOU COULD DO IT AT THE OIL FILTER BUT THE OIL STILL PASSES THROUGH THE ENGINE HOT WHICH CAN CAUSE EXTENSIVE DAMAGE AT THE HEATS THIS OIL CAN ACHIEVE. HAVE YOU SEEN THE SETUPS THEY HAD ON THE 80'S F1 CARS? THEY HAD AN AFTER TURBO OIL COOLER THAT HAD AN INDEPENDANT ELECTRIC PUMP, THIS IS WHAT I'M TALKING ABOUT.

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PROJECTRB240SX
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ITS PROBABLY FAR MORE EXPENSIVE THEN BENEFICIAL FOR MOST PEOPLE AND THE OIL FILTER LOCATED OIL COOLER IS THE BEST BET FOR MOST, BUT I SEE THE BENEFITS OF COOLING THE OIL BEFORE IT HITS THE ENGINE AGAIN IF YOU ARE RUNNING EXTREME BOOSTS OR IN EXTREME WEATHER LIKE AZ.

Frank@MVP
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I thought that the way most, if not all motors operated, the oil pump pumped the oil directly from the pan to the filter without passing it through the rest of the motor. Otherwise, what would be the point of filtering it if it is going to take all the trash from the oil pan and circulate it throughout the motor before filtering it?

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PROJECTRB240SX
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YEAH BUT WHEN THE OIL EXITS THE TURBO IT STILL GOES THROUGH THE ENGINE HEATING UP WHAT IT TOUCHES AND IT ALSO HEATS UP THE OIL IN THE PAN. LOGICALLY YOU ARE RIGHT NO MATTER WHAT IT WOULD WORK BUT IF THAT WAS THE MOST EFFECIENT METHOD WHY WOULDN'T THE F1 TEAMS DO IT THAT WAY?

Frank@MVP
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The oil from the turbo drains straight in to the oil pan. Then it goes straight from the oil pan to the filter (and oil cooler if present) and then gets circulated through the motor. As far as the most efficient way, do the current F1 cars do that or was it phased out in the '80's for a reason? I don't know if they still use it, so I am asking.

But I think the reason they had coolers for the oil as soon as it came out of the turbo was because they were pushing insane boost levels and getting 1000hp/liter out of these cars. The turbo's on them were probably glowing red all the time and the oil would need to be cooled so it didn't suffer severe deterioration from the extreme heat. I don't think a car run on the street or even with moderate track use would come anywhere close to putting the same amount of heat and abuse into the oil that those F1 cars did back then.

Don't get me wrong, I like the idea of a post-turbo oil cooler. I just don't think it is easy to do or very necessary for most people.

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PROJECTRB240SX
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THEY DON'T USE TURBOS ANYMORE.

Frank@MVP
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That would be a good reason.

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PROJECTRB240SX
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YOUR PROBABLY RIGHT, I JUST FIGURED IT WOULD BE A GOOD ENGINE LONGEVITY MEASURE. OIL COOLERS ARE A MUST IF YOU WANT TO SAVE YOUR ENGINE (MY CAR WILL BE FITTED WITH ONE BUT WHICH ONE I DO NOT KNOW).

THOSE F1 CARS WERE RUNNING 30-45 PSI OF BOOST, PRODUCING 950HP - 1600HP ON 4.5L OR LESS, ALWAYS ON BOOST, OFF AND ON THE GAS CONSTANTLY, AND JUST BEING WORKED HARD.... SO YEAH YOUR PROBABLY RIGHT IT WAS THE STRESS DIFERENCE THAT MADE IT EFFECIENT FOR THEIR PURPOSE.

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ibzbro
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all i have is a boost gauge. beacuse i am using the r32 gauge cluster and it has a stock boost gauge and oil pressure, so the next is an EGT.


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