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I've been reading a lot lately about unsprung weight and how beneficial it can be to reduce it for driving on the track, given my semi's only have another day or two in them I am throwing around the idea of some lighter wheels and a square set up. I have 265/35/19's and 245/40(?)/19 Federal 595's at the moment. The wheels and tyres are super heavy. I looked up my wheel weight online and got 14.5kg naked. Not sure if this was 8.5 (front) or 9 (rear) but that's a lot. I have also been reading about the benefits of a square setup. Much better rotation and potentially less understeer. When I throw these together I'm thinking about a 17x9 or 18x9 square (preferably under 10kgs per wheel) with 245 or 255's. I can get some cheap 17x8.5 BMW M Sport wheels, they weight 10.5 kg's each but at 8.5 wide could probably only get 245's on them? I know they come with 255's from factory but semi's are a bit chunkier. Otherwise it will be aftermarket wheels in a 9" width. Most of the other BMW wheels are heavy unless you pay a squillion dollars for some M wheels. Although, the E46 M3 Style 67's could be good but I'd have to buy 2 sets to square them up. My car has a tickle over 400hp and about to put an LSD in also, is 245 a little thin for a square setup? It kinda feels that way to me. Also, is there any tangible benefit to having 18's over 17's? Is the footprint demonstrably bigger? From those of you who went to light(er) wheels after heavy buggers, did you notice it much? -
Start with the R32 GTR wiring diagram. The ECU is essentially the same, so the pinouts are good. The details around ECCS relays, etc might differ a little bit, but the reality is that you need to get ignition power to kick the ECU so it powers up the ECCS relay which brings the rest of the ECU up. This also gives power to the other circuits that are needed to make the engine run, like the ignition coils, etc. All of this is visible on the R32 diagram and should give you a strong guide, even if it's not quite the same as the R33. As to specifics - I'm pretty sure no-one can help you from afar, as there is no way to know what mistake or omission has been made in connecting stuff up. It always turns out to be "LOL, I shorted something and an entire wire vanished out of the loom", or "We never connected X or Y main connector", or "shit, you mean I need to have that fuse installed?". -
By r33.antwone · Posted
hello wanted some insight on what my problem could be so i swapped a RB26DETT into my r33 gtst used a R33 GTR engine harness and im using a haltech platinum pro. The car cranks but no start the ecu isn’t getting any power now im trying to find out why i cant seem to find any schematics or diagram for the engine harness for the r33 gtr anything helps thank you. -
By DraftySquash · Posted
hahahaa @GTSBoy that is my last resort. Like use a cardboard and cut it using the indicator as a reference. But I was winging my luck to see anyone had a spare bumper because drawing the outline off the hole is always easier and less chance of mucking it up -
Admittedly in that screenshot its doing about 13psi but later on in the log theres definitely spikes to 16. What is missing though is the massive peak, then a big drop and then a recovery. While it does go a little higher than I would like on base pressure, I think it's reasonably safe to assume that boost control via the mac valve should be a lot easier to control from here on out. I wasn't game to hook up the mac valve today as it's very wet and it's on the verge of fighting traction as it is.
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