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-   -   RB20det swap into first gen (https://maxima.org/forums/1st-2nd-generation-maxima-1981-1984-1985-1988/608662-rb20det-swap-into-first-gen.html)

LeX Feb 24, 2010 12:31 PM

RB20det swap into first gen
 
So here are a few pics of the couple things going on so far with my 83 maxima rb20det swap

http://c3.ac-images.myspacecdn.com/i...20eb228fbe.jpg
http://c3.ac-images.myspacecdn.com/i...848735e196.jpg
LD28 bout to come out
http://c4.ac-images.myspacecdn.com/i...972cfc47f3.jpg
http://c4.ac-images.myspacecdn.com/i...391cf0d1ef.jpg
size of LD28 vs RB20
http://c1.ac-images.myspacecdn.com/i...15fb246bd8.jpg
preliminary fit

The motor basically 'drops' in.

In theory, you could redrill the stock mounts and just run it like that, but the shifter sits just a tad too far back so I am having spacers made to get it sitting just where I want it for proper shifter placement.

There is a ton of space in the front so you can retain the clutch fan (which I am doing for now) or get nice electric fans, and still have clearance and space for a FMIC. (running stock SMIC just for right now)

RB20 transmission is not big so its an easy fit in the tunnel.

Stock driveshaft length may be correct as well... spline count is right to fit into RB.

Should also be able to keep AC/PS no problem with just some fittings.

Downpipe just needs to be changed out for clearance of steering, and bottom mount setup is fine with just a different downpipe. Everything else has ample clearance.

Thanks to John and the crew at Garage Zero, we should knock this one out pretty fast

chrome91 Feb 24, 2010 01:04 PM

http://lh3.ggpht.com/_CqtZ6YfaifQ/So...ix-ev0/fap.gif

SiathLinux Feb 24, 2010 01:22 PM

Looks like a lot of work, but it'll be a beast when your done.

ajcool2 Feb 24, 2010 02:41 PM

Very Nice. Lex you should make a thread about this in the all motor section. There are alot of people in there that would be interested in this swap.

Hectic Feb 24, 2010 03:58 PM

Weird, I was bored last night looking through car domain for somebody, anybody who has dropped an RB into a 1st gen. Then this pops up today. Good luck, lots of work left.

Big_E-Dog Feb 24, 2010 04:34 PM

****in gangster makes me want to get working...

Sam o nela Feb 24, 2010 09:04 PM

Great!!!! :D

chrome91 Feb 24, 2010 09:29 PM

going with a intercooler or no?

LeX Feb 24, 2010 09:33 PM


Originally Posted by chrome91 (Post 7438882)
going with a intercooler or no?

for now just a stock sidemount, when I have a couple spare bucks i'll do a starion stock front mount as the piping is set up to work with minimal effort

http://forums.pelicanparts.com/uploa...1254259026.jpg

chrome91 Feb 24, 2010 09:37 PM

sweet. can we expect a loud BOV too? :hide:

LeX Feb 24, 2010 09:41 PM


Originally Posted by chrome91 (Post 7438892)
sweet. can we expect a loud BOV too? :hide:

factory valve (crushed) on recirc :) lol

chrome91 Feb 24, 2010 09:58 PM

you need a louder BOV!

doesnt non-recirculating give a better sound?

LeX Feb 24, 2010 10:47 PM


Originally Posted by chrome91 (Post 7438926)
you need a louder BOV!

doesnt non-recirculating give a better sound?

it does but with stock ecu stock tune you need to recirc

t6378tp Feb 25, 2010 05:38 AM

cool factor 100x

chrome91 Feb 25, 2010 08:41 AM


Originally Posted by LeX (Post 7438972)
it does but with stock ecu stock tune you need to recirc

oic. so youre using a Skyline ECU then since youve got the engine and tranny right?

this thing is gonna eat Civics for lunch :cool: paint job looks innocent and so does the design

Big_E-Dog Feb 25, 2010 11:02 AM

are those work equips, if so i would automatically suspect something, other than that its still gangster!

LeX Feb 25, 2010 11:50 AM


Originally Posted by Big_E-Dog (Post 7439620)
are those work equips, if so i would automatically suspect something, other than that its still gangster!

haha well ur in Cali. Over in the SE nobody knows crap about old JDM lol

They are riversides

MAX.Graff Feb 25, 2010 09:40 PM

Creatin' a Monster!!!!!!!! :eek:

Big_E-Dog Feb 26, 2010 08:54 AM

hahaha murdrer them civics though, give em that "WTF was that look" LOL!

chrome91 Feb 26, 2010 12:21 PM


Originally Posted by Big_E-Dog (Post 7441203)
hahaha murdrer them civics though, give em that "WTF was that look" LOL!

lol all he has to say is "i'll race you, but this thing is a slow old 4dr car, i think you'll win". kicks Civic a55, Civic comes by 30 seconds later with a ricer flyby:laugh:

chrome91 Mar 1, 2010 07:36 PM

http://engtech.files.wordpress.com/2...ar_engtech.jpg

Big_E-Dog Mar 2, 2010 03:30 AM

^^^ yep they allways do with that mean muggin *** look on their face, hondas aint the only things thats fast.

82maxtx Mar 3, 2010 08:26 PM

I JUST **** A ****ING BRICK

chrome91 Mar 3, 2010 09:34 PM

finish this bad boy, then i demand pics of it going sideways :hide:

Big_E-Dog Mar 4, 2010 03:38 AM


Originally Posted by 82maxtx (Post 7450063)
I JUST **** A ****ING BRICK


i bet if a 20 will fit then a 26 or even the 30 will fit as well

ummmmmm RB30DETT maxima drifter........ :chuckle:

schmellyfart Mar 4, 2010 11:59 AM

:eek: This makes me want to get a 1st gen.

SiathLinux Mar 4, 2010 12:36 PM

You and me both, especially since I can go to Miami and pickup RB26DETTs all day long... ($5K to 6K depending on mileage)

chrome91 Mar 4, 2010 08:06 PM

1st gen, 6spd with RB26DETT :drool1:

i can get RB26 here for less than a grand at the Nissan junkyard by me out of wrecked GTR, its so tempting to get a 1st gen and RB26 it for less than $2000 total

moar pics needed :D

LeX Mar 5, 2010 08:14 AM

tax return came in so have money for suspension and exhaust now

Big_E-Dog Mar 5, 2010 02:26 PM

HEY Chrome91 ill pay you if you can get those ITB'S out of that GTR lemme know.

chrome91 Mar 5, 2010 02:45 PM

i'll see if i'll be going anytime soon, its a few hours away but i may be making a trip there when it warms up for some 300zx stuff

82maxtx Mar 7, 2010 02:56 PM

I have a couple questions / ideas for you:

1. I see it WAS (LOL) a diesel car.... what are you gonna do about the fuel lines / tank? (my GAS 1st gen is for sale now, you could use it for these parts ;) PM me)

2. I'd suggest using a stronger diff than the maxima unit, BUT, the one you got in there now will be GREAT for cruising:D. I've read that an S12 R200(200sx) diff WILL work with 280zx half shafts and top diff mount. the R200 will be great off the line though :laugh:

3. I got the perfect / cheap solution for a sweet suspension set up: use front springs from a 79 through 84 mercedes 300d. these are easily found in junkyards or a quick craigslist search.... you use these springs for the REAR of the car lol sounds silly, but trust me, it works.... cut the springs about 2 inches shorter than the stock maxima rear spring and you can use the stock strut too, makes for a good 3 inch drop in the rear. beware your tire/wheel clearnaces though..... and for the front, Z31 front springs will work for the front of a 1st gen, theyre a little bit stiffer and almost the same size, just cut the top 1.5 coil off the top and you're good to go. mine is just like this and handles like a mofo!!!!!!! the only thing keeping it from being an awesome drifter is the stock open diff and auto trans...... look through my posts and you'll see I have the LOWEST 1st gen EVER.

4. are there any clearance issues with the stock maxima steering box?? I ask cause this is a problem with the L28ET motors downpipe hitting the steering shaft / box in our cars....

5. any issues clearing the steering rack???

6. what will you be using for throttle linkage???

7. what are you gonna do for a tach?? I know you won't be able to use the stock diesel tach in the cluster, a big dash mount tach might give it away and ruin the whole sleeper idea:laugh:.......

LeX Mar 7, 2010 03:17 PM

1. Proper cleaning of the fuel tank (radiator shop maybe if i need to) and just new soft lines after cleaning out the hard lines best we can.

2. Yeah this is going to be my DD so cruising i am fine with!! haha.
I don't know much about the whole rear end thing, but my friend has the line on a bunch of LSD's that can be made to fit so if something happens i'll probably get his help with one of those.

3. In regards to the suspension... I actually have a setup that's going on. Stock front struts with the cut Z31 springs like you mentioned, and rears are 3rd gen supra front springs on z31 or 280zx rear struts (not sure right now), think they are cut a bit but not positive lol.

4. yeah there is a problem with the steering box and the stock RB downpipe.

5. Don't appear to be any issues with the rack, nope.

6. on my 510 we used S13 stuff so probably doing that on this car.

7. I have the gas car dash with the tach, 135mph speedo, and oil and temp , going to rig that up to work using whatever electronic/mechanical sensors I need to use


Originally Posted by 82maxtx (Post 7455695)
I have a couple questions / ideas for you:

1. I see it WAS (LOL) a diesel car.... what are you gonna do about the fuel lines / tank? (my GAS 1st gen is for sale now, you could use it for these parts ;) PM me)

2. I'd suggest using a stronger diff than the maxima unit, BUT, the one you got in there now will be GREAT for cruising:D. I've read that an S12 R200(200sx) diff WILL work with 280zx half shafts and top diff mount. the R200 will be great off the line though :laugh:

3. I got the perfect / cheap solution for a sweet suspension set up: use front springs from a 79 through 84 mercedes 300d. these are easily found in junkyards or a quick craigslist search.... you use these springs for the REAR of the car lol sounds silly, but trust me, it works.... cut the springs about 2 inches shorter than the stock maxima rear spring and you can use the stock strut too, makes for a good 3 inch drop in the rear. beware your tire/wheel clearnaces though..... and for the front, Z31 front springs will work for the front of a 1st gen, theyre a little bit stiffer and almost the same size, just cut the top 1.5 coil off the top and you're good to go. mine is just like this and handles like a mofo!!!!!!! the only thing keeping it from being an awesome drifter is the stock open diff and auto trans...... look through my posts and you'll see I have the LOWEST 1st gen EVER.

4. are there any clearance issues with the stock maxima steering box?? I ask cause this is a problem with the L28ET motors downpipe hitting the steering shaft / box in our cars....

5. any issues clearing the steering rack???

6. what will you be using for throttle linkage???

7. what are you gonna do for a tach?? I know you won't be able to use the stock diesel tach in the cluster, a big dash mount tach might give it away and ruin the whole sleeper idea:laugh:.......


82maxtx Mar 7, 2010 05:28 PM

damn, sounds like you got everything covered. you're making this seem like it's an easy swap lol.... I may just keep my 1st gen now...... the L24E in my 1st gen just took a dump..... and I'm in the middle of putting an S13 KA24E into an 82' 200sx (S11), so I dunno about having 2 swaps being done at the same time lol I'm friggin broke from the OTHER project car now.....

LeX Mar 7, 2010 07:00 PM


Originally Posted by 82maxtx (Post 7455870)
damn, sounds like you got everything covered. you're making this seem like it's an easy swap lol.... I may just keep my 1st gen now...... the L24E in my 1st gen just took a dump..... and I'm in the middle of putting an S13 KA24E into an 82' 200sx (S11), so I dunno about having 2 swaps being done at the same time lol I'm friggin broke from the OTHER project car now.....

the SR in my 510 just died yesterday lol

chrome91 Mar 7, 2010 08:09 PM


Originally Posted by LeX (Post 7456020)
the SR in my 510 just died yesterday lol

too much redlining? :hide:

LeX Mar 7, 2010 09:14 PM


Originally Posted by chrome91 (Post 7456108)
too much redlining? :hide:

i actually hardly drove it, and never too hard. There were problems with the motor from day 1... took us forever to get 1 of the pistons to get going and i'm pretty sure it cracked and died

chrome91 Mar 7, 2010 09:18 PM

that sucks, gonna rebuild it or just get a whole new engine?

while we're on old school engines here, ive always wondered, how difficult would it be to put a rotary engine from a 80's RX7 (2nd gen i believe) into a 510?

LeX Mar 7, 2010 09:21 PM


Originally Posted by chrome91 (Post 7456196)
that sucks, gonna rebuild it or just get a whole new engine?

while we're on old school engines here, ive always wondered, how difficult would it be to put a rotary engine from a 80's RX7 (2nd gen i believe) into a 510?


bunch of guys I know have done that swap, i know it's been done a good bit. I personally have no knowledge of rotary stuff though!

chrome91 Mar 7, 2010 09:29 PM


Originally Posted by LeX (Post 7456199)
bunch of guys I know have done that swap, i know it's been done a good bit. I personally have no knowledge of rotary stuff though!

ive always wanted to do a rotary swap on something, a built up FC RX7 engine can redline at 10k or even at 11k :drool: thing is with Wankel engines you need perfect maintenance and rotary engines last a long time but when they die theyre done for good

i actually almost picked up a '87 GSL i believe it was for $300, saw the pictures and the look of the guy in it was enough to say that its cheap because hes never done any maintenance, ~20 year old stoner

coolest thing ive seen is Sunline racing i believe it is in Japan SR20DET a R32 GTS-T Skyline, built it had 200ish HP over the RB and the car lost alot of weight, considered doing a SR20 swap on my 3rd gen but ive been so used to the feel of a 6cyl i dont think i would stand a I4, just saving some money right now and then getting all of the Z31 turbo stuff, as well as custom CF hood, rims, etc


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