s13 vert build rb25det

Discuss the RB20, RB25 and RB26 series engines.
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240drfter
Posts: 49
Joined: Sun Jul 27, 2008 9:19 am
Car: 1990 240sx hatchback rb25det(sold without motor)
1993 vert built rb25det he351cw (for now) in progress
Location: valdese north carolina

Post

Well it's been a long time coming, but im getting close enough to feel comfortable posting my build.
A little history first though.

it started off with me buying a s13 hatch with an sr in it that wasn't running.
fixed it and tortured it for about 2 or so years...

Image

then had an oportunity to trade sr swap for an rb25det...so i did :bigthumb:

after getting the swap (straight from osakajdmmotors). i sold my eg hatch with ls in it and my built gsr turbo on engine stand to buy the necessitys and pay some bills.

got it put in stock and it run ok for about a year never really ran great though.

then bam cylinder down...broke ring land....i think it was cracked ever since i had it...never really ran boost over 11psi

then the simple tear down and rebuild started but ended up where i am today .. with a fairly built motor in a different car.

the build list now is:
s13 vert black
kyb shocks
skunk2 springs
300zx calipers
complete 300zx rear conversion with aluminum hubs
front conversion hubs
drilled and slotted rotors
stainless brake lines
brake line tuck(done by myself)
wire tuck (also me)
slivia front end conversion
perfect dash
nismo racing seats
heads up display with j30 tach

rb25det
eagle rods
weisco pistons
arp main studs
arp head studs
head 5angle and port n polish
stock cams
godspeed intake mani
q45 throttle body
ebay top mount modified
holset hx55

theres probably more but i can't think of anything right now

gonna post pics soon as i figure out best way...suggestions welcome

i put one pic up higher we'll see how it goes


User avatar
240drfter
Posts: 49
Joined: Sun Jul 27, 2008 9:19 am
Car: 1990 240sx hatchback rb25det(sold without motor)
1993 vert built rb25det he351cw (for now) in progress
Location: valdese north carolina

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since the pic in my first post went ok ill just have to upload all my pics somwhere first...heres a few for starters though

when i first got vert
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ill start off with the engine assembly
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and yes its purple
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and of course seconds after motor was in test fitting occured
Image

that's it for now i got tons of pics..but ill have to upload them to facebook or something first i guess

User avatar
240drfter
Posts: 49
Joined: Sun Jul 27, 2008 9:19 am
Car: 1990 240sx hatchback rb25det(sold without motor)
1993 vert built rb25det he351cw (for now) in progress
Location: valdese north carolina

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little wiring
Image
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and after manifold mod
Image

my do it yourself brake line tuck..not finished yet have to buy master cylinder(wilwood)
Image

supermario680
Posts: 42
Joined: Sun Feb 18, 2007 7:11 pm
Car: 90 300zx NA 2+2 stage IV

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Sick build man, a RB in a vert would be pimp

RRRRB
Posts: 759
Joined: Wed Jun 01, 2011 9:31 am
Car: 98 RB powered S14
Location: WA

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When do you think it will be finished? That turbo is quite large :)

whoareu
Posts: 163
Joined: Fri Aug 01, 2008 6:09 am
Car: 1993 rb25det s2 240sx vert
Location: Beaufort, SC

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welcome rb vert brother.

User avatar
240drfter
Posts: 49
Joined: Sun Jul 27, 2008 9:19 am
Car: 1990 240sx hatchback rb25det(sold without motor)
1993 vert built rb25det he351cw (for now) in progress
Location: valdese north carolina

Post

RRRRB wrote:When do you think it will be finished? That turbo is quite large :)
hope to finish by the summer...but i have no job right now

i did just order by brake master cylinder so ill finish the brakes up here in next couple weeks ill post up
all photos on the booster delete/brake line tuck

User avatar
240drfter
Posts: 49
Joined: Sun Jul 27, 2008 9:19 am
Car: 1990 240sx hatchback rb25det(sold without motor)
1993 vert built rb25det he351cw (for now) in progress
Location: valdese north carolina

Post

It's been a little bit but i thought i should update.

finished the brakes up gonna post some more pics, very happy with how they turned out.

actually just started it the other day to make sure everything was hooked up...started without
maf and without hooking any vacuum up but just did it to hear it run.
http://youtu.be/vEmIL_0qeW0

if anybody was curious about the booster delete i did ill explain it a little.
started out by completely removing the brake master, booster and all lines in front bay.
next i ordered the 7/8" willwood racing compact bmc from ebay(summitracing) for like $70 shipped.
took my factory gasket from in between booster and firewall and copied the bolt pattern onto some 1/4" steel.
http://sphotos.xx.fbcdn.net/hphotos-ash ... 9094_n.jpg
cut that out then cut out the center hole for the wilwood to mount to it.
bolted to firewall connected to pedal and done...have to run lines in bay and proportioning valve for rear.
http://sphotos.xx.fbcdn.net/hphotos-ash ... 2937_n.jpg
http://a4.sphotos.ak.fbcdn.net/hphotos- ... 0551_n.jpg
alot more room for downpipe
http://sphotos.xx.fbcdn.net/hphotos-ash ... 7028_n.jpg

User avatar
240drfter
Posts: 49
Joined: Sun Jul 27, 2008 9:19 am
Car: 1990 240sx hatchback rb25det(sold without motor)
1993 vert built rb25det he351cw (for now) in progress
Location: valdese north carolina

Post

finally solved the inhibitor wiring problem...now that it runs it still running rough..does anyone have any suggestions on plugs and or gap to use
since its lower compression. currently using ngk bcpr6es-11 gapped around .95mm....it just runs rough and plugs get black but not wet

User avatar
240drfter
Posts: 49
Joined: Sun Jul 27, 2008 9:19 am
Car: 1990 240sx hatchback rb25det(sold without motor)
1993 vert built rb25det he351cw (for now) in progress
Location: valdese north carolina

Post

i guess fuel pressure regulator was problem..gotta cheap ebay one off buddy for now
still got some more stuff to fix but heres a quick startup..
sounds pretty good at least.
http://youtu.be/FImZEWS_cyw
ignore the extra spark plug in iacv hose...its for extra horsepower :naughty:


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