RB20DET swap into D21

[s13_240_rb20]

you will need to shorten the shaft 3"'s.

shorten what shaft?? drive shaft?? if so, then did you take off the bars under the oilpan to lower the engine and then slide it back further, then replace them?

the wiring is fairly simple really. do a google search and you can find the rb pinouts and the truck pinouts. but overall it's really not bad.

I can't find the pinouts for a 93 auto hardbody anywhere. Can you please tell me where you found the info or email it to me or something. I have all the info I need for the wiring (RB pinout and my 240 swap guide points out the important RB wiring) but I need to know the trucks info so I can connect those important wires.

if you install the motor like i did( cut off the frame mounts and relocate) the oil pan and starter fit perfectly.

just to clarify, did you use the RB motor mounts on the truck frame mounts, or did you use the KA mounts from the truck on the truck frame mounts. Is the oil pan hovering over the "bars" or does it fit in behind them on your setup?? (this answer will help me sooooo much in picturing your setup.)

Thanks for all of your help. These are my main questions that are slowing me down...just situating the motor, figuring out the trucks pinout, and figuring out why I don't seem to have clearance to slide the transmission on back.

Thanks again for helping me!! Your truck should sell EASY!! I know my project is hot around here and it isn't even running yet...

--TJ

[jmd]

I used the rb mounts that came on engine and bolted them to the truck frame mounts that I cut off and moved forward. After you move the mounts forward the engine will drop right in and clear everything including steering linkage. You need to have access to a welder or someone with one that knows how to weld. i can help you with the truck wiring, just get your list together of which ones you need to know and I can email them to you. send me you email addy.

[s13_240_rb20]

Are you using a 5speed driveshaft, all stock? I can't get my auto 1993 d21 driveshaft yoke to slide into the RB20DET transmission.



--TJ

[jmd]

Are you using a 5speed driveshaft, all stock? I can't get my auto 1993 d21 driveshaft yoke to slide into the RB20DET transmission.

--TJ

Yes I am using the original driveshaft that came in the truck, but my truck was 5sp to start with. If your truck is automatic it is not going to work.

[s13_240_rb20]

Ok...well, I have alot more thinking to do before I resort to any quick actions. I am postponing the welding of the motor mounts because I am not exactly sure I like where the motor is. And I am trying to remember: I think my measurements for the auto and the 5speed driveshaft are roughly the same, but the auto transmission is about 2 inches longer. I guess that is why the auto driveshaft has an angle to it at the middle joint and the 5speed driveshaft is somewhat straight all the way back. My auto driveshaft (with its angle) wouldn't reach all the way inside the transmission even if it was the right yoke, so I am totally confused about whether I need to adjust the motor back somehow, or do I really need to shorten (or lengthen) the driveshaft when I switch the yoke from my 240 driveshaft.

I am going to do some more creative thinking before I make any decisions. I am trying to avoid getting driveshaft work done.

Anyways, does your sump sit over the bars or does is sit BEHIND them?? Mine will sit down on them and cannot slide back any more because the starter keeps catching on the tunnel. I will try again when I have a friend over to help me situate it better. I can only get it so far without having someone over to help maneuver the transmission while I maneuver the engine back.

I will be so glad once I am satisfied that I have it as far back and down as possible so I can get to the welding and then all the other stuff....

I just need to see a pic of your sump and how it is situated under there if you can. Then I will know if I can fit mine in any better before welding.

Thanks,

--TJ

[jmd]

my sump is in front of the centerlink. it put the motor much further forward, but it makes it all so much easier and faster. Sounds like your saying your shaft is too short? Maybe so, the auto transmission maybe shorter than the manual transmission. I had to remove about 3"s from my shaft. If i get a chance later this week I will drive it around inside the shop and lift it up and show you the sump to centerlink locatation and how i relocated the engine mount fro the bottom view.

Hey wanna work out a trade? My truck for your engine and transmission and about $1000.00

[s13_240_rb20]

Thanks (from me and anyone else who reads this in the future) again for your help. That pic will be greatly appreciated. I am still going to try my best to situate the motor as far back as I can to leave room for the radiator and IC piping. I will get to try again on monday morning if it is any warmer. Today it was in the 40's with a 20+ mph wind and wind chill in the 20's. Tomorrow I have to pick up my wife from her relative's hometown (spring break for her).

I'm not sure what's going on with my drive shaft. Your engine is more forward than mine and you had to cut some of the drive shaft off; but mine is further back and seems just a tad short. I'll figure it out....

I can't do a trade. I am running on empty at the bank and I think I am only about $40 behind you. That's how much the guy is gonna charge to come weld in the relocated mounts.

I'll let you know how it goes.

--TJ

Modified by s13_240_rb20 at 7:18 PM 3/28/2009

EDIT/UPDATE: Despite appearances on this day, the auto driveshaft is shorter than his 5speed driveshaft by about 4 inches on the front section of it. The auto driveshaft appears now to be the better length, so I swapped the 5speed yoke onto the automatic's driveshaft. It leaves about 1" hanging out of the transmission when the engine almost touches the firewall.

--TJ Modified by s13_240_rb20 at 6:15 AM 3/31/2009


Modified by s13_240_rb20 at 6:53 PM 4/1/2009

[s13_240_rb20]

Just goes to show, I can't trust my tape measure. When I bolted in the 5speed driveshaft, it left my belt pulleys IN the grill (under the radiator core support).. It appears to be positioned similarly to yours in the pic way above.

Anyways, I am going to let my lil mechanic'n friend come look at my auto and 5speed driveshafts and see about just swapping the "yoke" from the 5speed to the auto driveshaft. This should give me an almost perfect length if it works. I will probably have problems shutting the hood BUT I should be able to slide the motor all the way back to the firewall if I want to, and still have about an inch of "yoke" hanging out (that'll be about 3 inches inside the transmission)....(Never thought I'd say those words.....ewwwww..

I just hope my measuring tape doesn't fail me on this idea too...

--TJ
Modified by s13_240_rb20 at 6:23 AM 3/31/2009

[s13_240_rb20]

the HB has a fs5w71c transmission so there fore the fs5 used on the rb20 in the pics will bolt up to the HB crossmember. If your talking about an engine crossmember there is none. peace.

Sooo, are you saying: "fs5 (transmission) used on the rb20 in the pics will bolt up to the HB (transmission) crossmember."?? If so, then I couldn't figure it out the other day when I looked at them for about 30 seconds and gave up. I thought they looked completely different, but I will look again later (when I get to that point).

--TJ

EDIT:

You're right..lol By switching the mount on the bottom of the KA auto transmission to the bottom of the RB transmission, the mount bolted right up to the hardbody transmission crossmember. However, with the engine all the way up against the firewall, the transmission crossmember is off by about half of an inch. Luckily there are other holes down there to put a nut and bolt in...may have to drill out a matching hole on each side?? (I haven't tightened everything down yet)

--TJ






Modified by s13_240_rb20 at 6:49 PM 4/1/2009

[s13_240_rb20]

Well, I am finally starting on my wiring. Of course there are a thousand guides to the "RB into whatever" so I can figure these out fairly easily. But I still need to know what hardbody wires these hook up to. These are the wires that I connected to my 240 to make the engine run, so these are the ones I need to hook up to the truck to make the engine run:

white/purpleblack/redwhite/blackRED

also a white/red wire from the alternator plug... If you can tell me what wires these hook up to on the truck it would be GREAT!!!

Thanks,

--TJ

[jmd]

Those are the power and grounds, to power thew system up to enable it to start, plus you need to tie it into the fuel system to power the pump. This is the diagtram I used to wire it. "the rb side"

[s13_240_rb20]

Thanks! That tells me what all my RB wires are, but I actually need to know what wires I hook up my RB wires to. I am using the guide for a RB20 into an S13.

A pinout just like that one would be great for the 1993 d21 automatic and/or 5speed.

I know I need to hook up the RB wires: white/black, white/purple, black red, and on the alternator: white/red

These are mostly IGN and ECU power wires, I think...But I need to know what wires you connected these to. If you have the PIN # on the ecu harness and the name of the signal it would definitely help alot...

--TJ

[jmd]

Not sure which wires you need to wire on your rb side to go to the truck side. If you can tell me the wires you need to wire on the rb side i can tell you where on the truck side.

[s13_240_rb20]

Not sure which wires you need to wire on your rb side to go to the truck side. If you can tell me the wires you need to wire on the rb side i can tell you where on the truck side.

I really need to locate the truck's fuel pump wires now. Do you know where I can find them and what color they are?? I have the truck running but it's using an external fuel pump and fuel cell. Of course it runs like crap and dies quickly without any IC piping..lol

Other than that, I am down to about 3 wires but it runs when they are hooked to 12v. They are the ECU power wires and the white/purple IGN Relay wire. where did you hook up your white/purple RB (IGN Relay) wire??

--TJ

[jmd]

I really need to locate the truck's fuel pump wires now. Do you know where I can find them and what color they are?? I have the truck running but it's using an external fuel pump and fuel cell. Of course it runs like crap and dies quickly without any IC piping..lol

Other than that, I am down to about 3 wires but it runs when they are hooked to 12v. They are the ECU power wires and the white/purple IGN Relay wire. where did you hook up your white/purple RB (IGN Relay) wire??

--TJ

white and purple I hooked to a output from the ignition. the fuel pump wires are right there by the ecu. The white connector with I think 5 or 6 wires going thru the floor board. I think the blue/yellow wire is fuel pump or the solid blue. I will look at mine again and double check. Sorry for the long response times, I don't much time to get on the computer.

[Rev_D21]

I can get you a pin out for a 93 HB this week. I have a brand new FSM sitting in my garage. I'll scan it and post it up.

[sr20gt30r]

http://s526.photobucket.com/al...%2089/

vidz coming soon...
Modified by sr20gt30r at 6:14 AM 4/29/2009

[jmd]

well ...... got slow at the shop. so i pulled the truck in and got a radiator in and finally took it down the road for the first time. runs and drives good with the exception that the turbo is bad. the exhaust turbine is damaged and won't spin enough the make boost. anyone know where i can get a used rb20 turbo? I want the stock turbo, not aftermarket.

[s13_240_rb20]

check the classifieds sections here on NICO:

zeromain?id=174

look in the engine/drivetrain first, and then maybe the complete partouts section just in case...

--TJ

[95RB20S14]

What pin on the Rb20 harness is the ignition coil relay (white/purple)? I cannot find it nor do I see it on the pinouts I've looked at.

[d21shoemaker]

what motor mounts do you use to put an rb20det into a 91 hardbody?

[StephenG]

what motor mounts do you use to put an rb20det into a 91 hardbody?

Please read the thread before asking a question that is already answered. The stock RB motor mounts are used, but welded to the truck frame about 6 inches forward of the stock location.

[d21shoemaker]

i was just wondering if you had anyother method of doing it because that sounds like a bi**h to do

[slippermotorsports]

What happened with these swaps??
I have a 94 d21 XE and I am considering replacing me ka24e with an rb20. Curious to know how these swaps turned out.
Same issues you would run into with swapping an sr?
Any help would be appreciated