how to make an rb20 push 350whp

[carcrzy920]

okay i got the key out. well i plan to use the crossmember that came with the motor. and a clutch, thermostat, and fluids wont be that much or hard to do. if im not mistaken i have talk with a representative of mkinneymotorsports and he informed me that theyll do the entire wiring swap for $150 as long as i can send the all harnesses and such. all im really trying to figure out is what type of rediator to get ka24e, de, sr20, etc? i got the intercoller picked out from rb-performance for $350 for the kit. stock 5 speed drive shaft till i got the money for at least a one piece. where to get the pwr steering pump. and what lines to use with it and what type of radiator hoses to get? wasnt really hopeing to get all this negative feedback about an rb20. if i hadent had my mind set on it for so long and didnt want to give up my project i think i would have just said **** it i dont wana deal with it but i love my 240 and want an rb!!

[legit240sx]

no by all means rb are awesome "the shat" and the whole rbxx vs rbxx is all depending on what you want....

the stock radi will work or you can buy a aftermarket KA rad and it will fit, SR's will not. The radi hoses are best to get aftermarket sillicone but you can see what bends and size you need and get some from a auto store but fyi the thermostat housing metal tube is a bigger diameter then the upper tube and is a B to try and get on with the wrong size hose.

i got my powersteering pump off ebay non hicas r32 ps pump, don't know if rbs came non hicas or if this is even from a skyline but it works so... don't know what every one else is running

i'd look up what you need to do with the crossmember, last i knew you have to bend the shifter but not fully sure the full extentof it. Got the Mckinney mounts and the work like a charm!

[Carl H]

150$ for wiring from mckinney?thats much lower than what i saw last time.

[carcrzy920]

well that was like a year ago so idk what the prices could be now. look i know im going to be spending alot on this swap. but i really dont have anything else to spend my money on so im not worried about it. im 17 and dont have a single bill besides my cell phone. and over the weekend i just made $1200 so i constantly can make money wiether it be mowing grass or fixing the neighbors car. money isnt really a problem to me but an rb20 is what i want and obviously what im going to get. im not looking to get 450-500+whp so why would i want an rb25. yea i could get to the 350 mark faster but im sure it would cost just as much if not more because yea your nameing off the bad things that could happen when you buy an rb20 but they could happen to an rb25 as well. and honestly guys i really dont think i could trust myself in an rb25. so rb20 is my choice and i really appreciate everyone that could be helpful on which parts to get too.

[carcrzy920]

hey well ive been doing some research and i saw if you use the 32 crossmember with the r32 mounts as long as there not blown the stock elbow will clear the steering shaft by almost 1/2". is that true? what are you using Carl? i know your rb20 makes almost 400hp so your the main guy i wana talk to for info about how to build mine and what to do to make it right.

[DriftX]

If you want a nice wiring harness, have carl h do it. He's done so many he can prob do it in his sleep.

[90240sxca18]

Carl ive been trying to look into ROM tuned ecu's and just dont get it.. what exactly is needed and how complicated is it to run this type of tuning port? i just have a rb20det, with a t3/t4 stock injectors and a n60 mafs, external wastegate at 7psi. i was going to be tuning with a SAFC II but dont want to if i can figure this out or get someone to figure it out for me.. what are your thoughts on NISTUNE? or say a JWT pretuned daughterboard?

[yotik]

this is great youre looking for the same power goals as i. my rb20 has worked out well so far. carl did my harness and it was basically plug n play. i dont know how many other build threads there are for the 20 on here but you could look at mine in the link below. also dont forget to use search, everything you need to get it goin should be on here ...

[lexrob]

Im actually in the middle of my build trying to source parts ....

From what I've read and what im planning on doing is that gtr injectors, rb25 turbo, and a good tune will get you right around 300 ponies.. The tune part is the problem, no dyno's even close to me. Which is technically the only way to make "maximum gains safetly". You can get close tho street tunning with a wideband, egt, intake sensor,logging capabilites, and or course a way to edit your rom..... I tried it on a honda worked ok but tons of wierd intermitent problems and was afraid of inaccurate wideband...

Make shur even if you get someone to make you a rom get it dynoed and fine tuned if you plan on running it hard which of course means more money but it more of an investment at that point.

anyways just my two cents good luck got to love EFI ..lol

[Cjmartz2k]

Street tuning is the MOST accurate way to tune a car. Most dyno's aren't even load bearing, and you are stupid if you try and tune on one of those, but I'll assume for the sake of argument you were only talking about load bearing units and just forgot to mention it. What makes you think the wideband attached to the dyno is any more accurate than the one you would buy to tune on the street with? Also, most of the widebands you find with dyno's are the "stick it up your tailpipe" kind, and those suck a** due to the delay from engine to exhaust exit. I'm not trying to bust balls, but know what you are talking about. Your plan of GTR injectors, 25 turbo, and a good ROM tune should net you close to 300rwhp though, so your on the right track there.

[Carl H]

tail pipe widebands can drift as much as one point on the wideband.

[ST240]

Street tuning is the MOST accurate way to tune a car.

Yay, this makes me happy.

Your plan of GTR injectors, 25 turbo, and a good ROM tune should net you close to 300rwhp though, so your on the right track there.

This is what im doing too. 25 turbo, gtr injectors, z32 maf and nistune. That is, once my rb25 turbo gets here from you

[Cjmartz2k]

It still hasn't gotten there? Wow, kinda surprised. Well, never mind. I guess it's only been like 12 days, and it's taken that long to get to Florida before. Let me know if you don't get it by the end of the week though. :-)

[PorkChopExpress]

i just got a holset hy35 for $80 shipped. ordered a synapse wastgate. all i need now is injectors and a z32/cobra/lightening/vh45 maf and imma make the turd scream.

[Cjmartz2k]

$80??? Damn, that's cheaper than dirt. I hope it's in good shape for that cheap. Do you know if the rebuild kit for the HX's is the same as the HY? I'm real curious how it will do on yours porkchop. It'll be the first one on an RB that I know of.

[rbchick]

2 wordsNistune- Chip

[PorkChopExpress]

the ebay listing said it works well and was pulled at 65k.the hot side looks a little rusty from salted streets. nothing the sand blaster cant fixwe will see. i believe the hx/hy rebuild kits are the same.i have nistune.

[carcrzy920]

okay where are yall finding these big holsets? i want one. which is best for my power goals? they pretty much just bolt right up right?

[Durty_sucka!]

Anyone have experience with a rb20 at 350 Whp with little lag? I'm thinking a t3 .60 hot side from a 2.3 turbo ford or a t3/t4 .48 Hotside?