Does anyone have 3.7 diff ratio with an RB20DET?

Quote: Originally Posted by revelry Does anyone have 3.7 diff ratio with an RB20DET? Nah 4.11 for me.

Well i did my convertion on the weekend the dump pipe fits and i made my own from after the dump down to the cat. the only problem i hav is the wiring part i got told to leave the battery side for the alltonator and starter motor so i have done that but how do i get it to link into the ecu harness? any help would be great

hay got a vl just wondering how much u could put a rb25 in for me ??? i am in warrnambool

i am doing the rb20 conversion i have a half cut and i have changed all the things listed above i am wondering how much will it cost me to get someone to wire it all up?

Quote: Originally Posted by jedsjet i am doing the rb20 conversion i have a half cut and i have changed all the things listed above i am wondering how much will it cost me to get someone to wire it all up? Depends who you know... $250 to $500...

dos anyone have the wiring i need to connect to get my 25 motor running in my vl ?? its all in and done i powered relay up so comp turns on but no go :s not too sure wats going on !!

Hey guys, just have a quick question. My calais currently has a n/a motor with a mx7 5 speed box. Just wondering if I can keep the mx7 behind the rb20? what clutch should I use? Or should I just put the rb20 box in aswell? are the ratios very different? thanks

Quote: Originally Posted by Sled Hey guys, just have a quick question. My calais currently has a n/a motor with a mx7 5 speed box. Just wondering if I can keep the mx7 behind the rb20? what clutch should I use? Or should I just put the rb20 box in aswell? are the ratios very different? thanks Man dont put the RB20DET box in it they are weak as piss. Put the MX7 in it, you may need to change the bush though to suit the size of the input shaft on your MX7. Clutch depends on how much power your putting out... for 160-200 RWKW id just put in a heavy duty clutch. For 300+ RWKW id be looking at twin plates. Ciao.

How you goin everyone, Ive had alot of people ask me about the wiring diagrams, Ive found a CD with a rb20 wiring diagram and a heap of other info on it the files are in PDF format, anyway if I can find a place to host them then its all yours, like I said to most people who have sent me PM's etc I got JPC to wire the engine up when I had the car if you are really getting stuck check out skylinesaustralia forum (I think there was a NZ skyline forum which was helpfull too back when I was doing the conversion.. Just a quick few reply's Revelry- Nah go 4.11's otherwise you are just loosing out on the full potential of the RB20, you can get the gears out of an old skyline Gm-187 - Nah had enough trouble when I had mine although I know a bloke who is doing that kind of work around wbool, send me a PM for his name sohc2 - im with you on that dont bother using the RB20 box use a RB25 or MX-7, I snapped the output shaft on one (rb20) when i ran it down the strip

Just curious, are people on here saying that the vl ecu be used to run the rb20 with minimal mods? another question: i am thinking about getting an rb25 for my vl! i would have to run the rb25 wiring loom for this, correct? if so would it be hard to wire it up to the ignition? also does the rev signal just hook up to the same wire that the vl uses? can all the bolts be used from the vl, as in alternator, pwr steering etc? thanks

Yes, you must use the RB25 loom. This is a twin cam motor, it is completely different from the SOHC RB30. The rev signal will not hook up the same way. You will need to make a small circuit to get your dash (or any other tacho) working. Seen here: http://calaisturbo.com.au/showthread.php?t=20937

gday mate ive got a vl commodore ive done the rb20det conversion with the manual gearbox. im having troubles when it comes to the wiring can u recommend anything everything is bolted in and fine ive got the rb30 alt, and starter in the rb20 it turns over fine just when it comes to the ecu and fuel i have no idea..

Everything you need to know about wiring it up is here. RB25 pinouts are identical to RB20. Ignore the fuel pump bit though as you just need to run the trigger from the ecu straight to the dark green wire as the RB20/25's use the same relay set up as a VL http://wiki.r31skylineclub.com/index...ET_into_an_R31 (http://wiki.r31skylineclub.com/index.php?title=Wiring_an_RB25DET_into_an_R31)

I have just disconnected the vl harness from the two plugs under the glove box! are these connectors from the fuse box and i assume dash! or somewhere else! if so which colour is the fuse and dash! thanks!

Keep those plugs and use them for your power supplies. The fuel pump trigger wire is also in one of the plugs. Pretty much cut every wire out of the loom besides the oil pressure sender, battery signal for dash, coolant sender for dash, crank signal, fuel pump and +12v and ignition wires and intergrate it all into the RB20 engine loom.

---------- Post added 20-08-10 at 21:42 ---------- I also found a link http://wiki.r31skylineclub.com/index..._into_an _R31 (http://wiki.r31skylineclub.com/index.php?title=Wiring_a_Silvertop_RB20DET_into_an_R31) Some original photos have not been recovered yet.

its got the rb20 no top cover on it and it started 1 time after cleaning the engine bay and it was running like a dog any 1 no what to do cheers ---------- Post added 28-11-10 at 21:08 ---------- i washed my engine bay and it wont start -------------------------------------------------------------------------------- its got the rb20 no top cover on it and it started 1 time after cleaning the engine bay and it was running like a dog any 1 no what to do cheers

prob got water in the coil packs

just use the loom the 20det comes with and the 20det computer, then get sparke to wire it up to the dash.