new but looking for help - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

star_Screem70 · 10-30-2008, 12:43 PM

i have an s13 chassis with a planned rb25 swap...piecing all together, but im stuck on what i can do with the motor. ive tried searching for what people have made with certain builds...i want to have around 400-450 rwhp and run about 15psi on high boost from time to time. what would i have to look into to reach that number. i plan to have the head mildly worked but other than that what would i need to look at in order to reach my numbers. possibly a wlink to read on builds and outcome power numbers. let me know, thanx

SoguRacing · 10-30-2008, 12:45 PM

just a big turbo and a clutch to support it, fmic, and bigger injectors along with a stand alone unit.

star_Screem70 · 10-30-2008, 01:36 PM

what can the rb25 withstand stock form? so grab some injectors, turbo, fmic, clutch and stand alone will give me 450 rwhp and no hiccup? well with a good tune

*MELLO*SOS* · 10-30-2008, 01:46 PM

Don't even worry about that stuff for now. Just put the 25 in, get it wired up and running properly for now. You'll run into so much other little bullshit that you have to deal with before worrying about making some specific ambiguous number. Only thing you should do off the bat is an FMIC during install; and of course replace rubber/gaskets/maintenance/fuel pump, etc.

To make the power you want, get a new turbo like a GT35 or T3T4 or similar. Stock ceramic turbine disintegrates over 12-14psi continuous use. Next you'll need new injectors, some 550s to 720s will suit your needs. Get a PFC to tune the setup with. You may need cams, the tomei poncams drop in and should give you the breath you need to reach your number.

There are several threads on Skylines australia about dyno power vs mods done for 20/25/26 motors. Go there and do some research... You're about to start on a lonnngg journey, do your homework now and it will pay off in the long run

star_Screem70 · 10-30-2008, 02:10 PM

im doing research day in and day out...

star_Screem70 · 10-30-2008, 02:39 PM

does the mckinney mounting brackets require to modify the stock crossmember...or do i use the stock cross member and the mount kit adjusts everything with the way there built?

*MELLO*SOS* · 10-30-2008, 03:23 PM

You just use the S13 KA cross member. Everything adjusts because they use slotted holes and whatnot.

star_Screem70 · 10-31-2008, 12:49 AM

so is that just a sales slogan for upgrading your mounts? trans mount works too? rb will swap in with all the stock 240 mounts and such?

*MELLO*SOS* · 10-31-2008, 01:17 AM

sales slogan?? Not following you. Oh I think you misunderstood... The mckinney kit re-uses the S13 engine crossmember but has it's own engine mounts and trans mount. Just go to their site and research it, it's a decent kit but there are others out that are arguably better. Mount kit threads are a dime a dozen just do a search or two.

PS the RB will not swap with the stock 240 mounts and such. You need to use a R32 xmember and RB mounts or a KA/R33 xmember and a mount kit..... again this info is beaten to death just search around and you'll learn everything you need.

star_Screem70 · 10-31-2008, 01:28 AM

yea i completely misunderstoond lol, ive searched and i have found companies that offer the mount kit to use on my stock ka cross member, thats my bad.

*MELLO*SOS* · 10-31-2008, 11:38 AM

Yeah quite a few re-use the S13 xmember... Except the Syko Performance kit which uses the R33 xmember. GL with your project

star_Screem70 · 10-31-2008, 12:24 PM

right on, thanx

*fliprayzin240sx* · 11-01-2008, 05:34 AM

You can run the stock turbo, stock manifold, stock injectors to 350hp to close to 400hp depending on the tune. I got a guy in Okinawa running a 550whp RB25 on stock bottom end still with a diesel turbo off a Dodge Truck. He's been trying to blow it for over a year so he can get an excuse for a rebuild. Before I left, he just upgraded to a bigger Holset turbo and should be hitting close to 650whp and he's finally going to do a rebuild as the engine is starting to show its age.

PS: Looked up his build:

Go fast shit
RB25 (stock bottom end)
RB25 5 speed w/OS Geiken undamppered tripple plate clutch
HKS 264 in/ex cams with matching cam gears
Tomei valve springs
Tomei headgasket (stock 9:1 compression)
RB26 oil pump
RB26 individual throttle bodies and surge tank using adapter to RB25 head
Z32 MAF inside 100mm intake piping
80mm intercooler piping (ebay special)
4'' (4 core?) intercooler (ebay special)
Full exhaust with RSR catback
Power FC with boost control kit
Stec top mount stainless manifold
Stec 50mm wastegate
Holset HX40 turbo with 19cm ex housing

Fuel Stuff
2 walbro pumps out back
Aeromotive FPR
HKS fuel rail
Shitty ass no name 850cc-860cc injectors (free, so yeah)

Handling/stopping
Cusco Zero coilovers
Super duper shiny JDM tight drift spec Mines strut tower braces
R33 front brakes with slotted rotors all around
Stainless braided brake lines
Cusco 2 way diff

Other stuff (sorry for actually listing some of this shit )
Rear mounted battery
C's short throw
Greddy Type R BOV
Ballin' ass leather covered GTR seats
In dash DVD
Sweet ass custom fit leather shift and e-brake boots from Poland Plug Plug
Blitz boost and ex temp gages
260kph speedo
Flexilite e-fans w/Billion VFC
2 core copper radiator
10'' sub
80mm weld in ECV for da popo's

Planning water/meth injection in the near future...

10-30-2008, 12:43 PM	#1
star_Screem70 Join Date: Oct 2008 Location: wyoming/colorado Age: 35 Posts: 7 Trader Rating: (0) Feedback Score: 0 reviews	new but looking for help i have an s13 chassis with a planned rb25 swap...piecing all together, but im stuck on what i can do with the motor. ive tried searching for what people have made with certain builds...i want to have around 400-450 rwhp and run about 15psi on high boost from time to time. what would i have to look into to reach that number. i plan to have the head mildly worked but other than that what would i need to look at in order to reach my numbers. possibly a wlink to read on builds and outcome power numbers. let me know, thanx

10-30-2008, 12:45 PM	#2
SoguRacing Post Whore! Join Date: Nov 2007 Location: (714) Age: 35 Posts: 2,967 Trader Rating: (23) Rides Gallery: SoguRacing Feedback Score: 23 reviews	just a big turbo and a clutch to support it, fmic, and bigger injectors along with a stand alone unit. __________________ Pre Tune Checkup! Compression,LeakDown,Vacuum Test $80. Cams Install: $180

11-01-2008, 05:34 AM	#13
fliprayzin240sx Man w/ CTSV & a Car Seat Join Date: Aug 2002 Location: Tampa Posts: 17,998 Trader Rating: (19) Rides Gallery: fliprayzin240sx Feedback Score: 19 reviews	You can run the stock turbo, stock manifold, stock injectors to 350hp to close to 400hp depending on the tune. I got a guy in Okinawa running a 550whp RB25 on stock bottom end still with a diesel turbo off a Dodge Truck. He's been trying to blow it for over a year so he can get an excuse for a rebuild. Before I left, he just upgraded to a bigger Holset turbo and should be hitting close to 650whp and he's finally going to do a rebuild as the engine is starting to show its age. PS: Looked up his build: Go fast shit RB25 (stock bottom end) RB25 5 speed w/OS Geiken undamppered tripple plate clutch HKS 264 in/ex cams with matching cam gears Tomei valve springs Tomei headgasket (stock 9:1 compression) RB26 oil pump RB26 individual throttle bodies and surge tank using adapter to RB25 head Z32 MAF inside 100mm intake piping 80mm intercooler piping (ebay special) 4'' (4 core?) intercooler (ebay special) Full exhaust with RSR catback Power FC with boost control kit Stec top mount stainless manifold Stec 50mm wastegate Holset HX40 turbo with 19cm ex housing Fuel Stuff 2 walbro pumps out back Aeromotive FPR HKS fuel rail Shitty ass no name 850cc-860cc injectors (free, so yeah) Handling/stopping Cusco Zero coilovers Super duper shiny JDM tight drift spec Mines strut tower braces R33 front brakes with slotted rotors all around Stainless braided brake lines Cusco 2 way diff Other stuff (sorry for actually listing some of this shit ) Rear mounted battery C's short throw Greddy Type R BOV Ballin' ass leather covered GTR seats In dash DVD Sweet ass custom fit leather shift and e-brake boots from Poland Plug Plug Blitz boost and ex temp gages 260kph speedo Flexilite e-fans w/Billion VFC 2 core copper radiator 10'' sub 80mm weld in ECV for da popo's Planning water/meth injection in the near future... __________________ If you think Zilvia has too many assholes... CLICK HERE!!!

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10-30-2008, 01:36 PM	#3
star_Screem70 Join Date: Oct 2008 Location: wyoming/colorado Age: 35 Posts: 7 Trader Rating: (0) Feedback Score: 0 reviews	what can the rb25 withstand stock form? so grab some injectors, turbo, fmic, clutch and stand alone will give me 450 rwhp and no hiccup? well with a good tune

10-30-2008, 01:46 PM	#4
MELLOSOS* LAID OUT Join Date: Mar 2004 Location: LAS VEGAS Age: 39 Posts: 2,015 Trader Rating: (1) Rides Gallery: MELLO*SOS Feedback Score: 1 reviews	Don't even worry about that stuff for now. Just put the 25 in, get it wired up and running properly for now. You'll run into so much other little bullshit that you have to deal with before worrying about making some specific ambiguous number. Only thing you should do off the bat is an FMIC during install; and of course replace rubber/gaskets/maintenance/fuel pump, etc. To make the power you want, get a new turbo like a GT35 or T3T4 or similar. Stock ceramic turbine disintegrates over 12-14psi continuous use. Next you'll need new injectors, some 550s to 720s will suit your needs. Get a PFC to tune the setup with. You may need cams, the tomei poncams drop in and should give you the breath you need to reach your number. There are several threads on Skylines australia about dyno power vs mods done for 20/25/26 motors. Go there and do some research... You're about to start on a lonnngg journey, do your homework now and it will pay off in the long run

10-30-2008, 02:10 PM	#5
star_Screem70 Join Date: Oct 2008 Location: wyoming/colorado Age: 35 Posts: 7 Trader Rating: (0) Feedback Score: 0 reviews	im doing research day in and day out...

10-30-2008, 02:39 PM	#6
star_Screem70 Join Date: Oct 2008 Location: wyoming/colorado Age: 35 Posts: 7 Trader Rating: (0) Feedback Score: 0 reviews	does the mckinney mounting brackets require to modify the stock crossmember...or do i use the stock cross member and the mount kit adjusts everything with the way there built?

10-30-2008, 03:23 PM	#7
MELLOSOS* LAID OUT Join Date: Mar 2004 Location: LAS VEGAS Age: 39 Posts: 2,015 Trader Rating: (1) Rides Gallery: MELLO*SOS Feedback Score: 1 reviews	You just use the S13 KA cross member. Everything adjusts because they use slotted holes and whatnot.

10-31-2008, 12:49 AM	#8
star_Screem70 Join Date: Oct 2008 Location: wyoming/colorado Age: 35 Posts: 7 Trader Rating: (0) Feedback Score: 0 reviews	so is that just a sales slogan for upgrading your mounts? trans mount works too? rb will swap in with all the stock 240 mounts and such?

10-31-2008, 01:17 AM	#9
MELLOSOS* LAID OUT Join Date: Mar 2004 Location: LAS VEGAS Age: 39 Posts: 2,015 Trader Rating: (1) Rides Gallery: MELLO*SOS Feedback Score: 1 reviews	sales slogan?? Not following you. Oh I think you misunderstood... The mckinney kit re-uses the S13 engine crossmember but has it's own engine mounts and trans mount. Just go to their site and research it, it's a decent kit but there are others out that are arguably better. Mount kit threads are a dime a dozen just do a search or two. PS the RB will not swap with the stock 240 mounts and such. You need to use a R32 xmember and RB mounts or a KA/R33 xmember and a mount kit..... again this info is beaten to death just search around and you'll learn everything you need.

10-31-2008, 01:28 AM	#10
star_Screem70 Join Date: Oct 2008 Location: wyoming/colorado Age: 35 Posts: 7 Trader Rating: (0) Feedback Score: 0 reviews	yea i completely misunderstoond lol, ive searched and i have found companies that offer the mount kit to use on my stock ka cross member, thats my bad.

10-31-2008, 11:38 AM	#11
MELLOSOS* LAID OUT Join Date: Mar 2004 Location: LAS VEGAS Age: 39 Posts: 2,015 Trader Rating: (1) Rides Gallery: MELLO*SOS Feedback Score: 1 reviews	Yeah quite a few re-use the S13 xmember... Except the Syko Performance kit which uses the R33 xmember. GL with your project

10-31-2008, 12:24 PM	#12
star_Screem70 Join Date: Oct 2008 Location: wyoming/colorado Age: 35 Posts: 7 Trader Rating: (0) Feedback Score: 0 reviews	right on, thanx