bestbangforthebuck

[chaosnite]

so i've looked over the posts a bit and come up with just a few questionsbasically I'm looking for a daily driver approaching 400bhp. I want to pay for the engine, install, and mods on a 6k budget.

based on performance, cost of upgrades, and reliability which engine is the most cost effective base to build on? RB20 or RB25 (I think RB26 is out of my budget range)

What's the best way to make that power? (please list the mods necessary to reach my goal) From what I read it was injectors, fuel pump, and hiflow the t3 turbo.

[chaosnite]

Damnit! I just saw the 350hp thread.. sorry if this post is redundant. I'm looking over it again and hopefully my post if just different enough to merrit some responses!

[Redline240]

yeah fuel pump, walbro 255 or similar, injectors, 555 or so, turbo of course, probaly T3/T4 hybrid, some form of fuel managment, like a SAFC or standalone, a BOV, a external wastegate if the turbo doesn't have an internal one, and a FMIC....

Thats just what comes to mind. Are you planning to run 400rwhp daily? or lower boost and run that at the track? Just wondering, cause personally i'm planning on running a RB26 on a T66 or T78 and run 30psi at the track, but daily i'll proably only run 10-15psi...

If only next winter could come faster so i could swap, yeah thats right, i'm wishing for next winter!

[chaosnite]

actually I'm not even looking for 400hp at the wheels- I guess I should say I'm looking for apprx 325 hp @ the wheels. Does anyone think I could make that kind of power on the stock turbo? I guess everyone agrees that engine management, injectors, FM IC, and a fuel pump are necessary, right?

[dohctor_yaj]

325whp is not possible with either stock turbo's from what i hear...maybe 325 fly hp from the rb25 but not the rb20 anyday...

some other things to get other then what RedLine240 said: (excuse my stupidity if not completely correct as i'm in the process of learning myself):

Boost controller, EVC IV or profec bsome better ignition system

if you're gonna get a side to side intercooler, you should get a unstable manifold or best off just getting a greddy one...

get a nice top to bottom flow like a griffin one if using the stock intake manifold...

[Siddhartha]

d00d, top-to-bottom intercooler?? side-to-side intercooler???

Front mount is the one you can see in the front bumper, side mount is the one thats in the fender, and top mount is the one that is mounted in subaru wrx', on top of block.

sorry, just tryin to avoid confusion . . .

[dohctor_yaj]

top to bottom flow intercooler:

http://www.roadraceengineering...s.htm

side to side intercoolers:

http://cgi.ebay.com/ebaymotors...33742

side mount intercooler:

http://cgi.ebay.com/ebaymotors...=6745

obviously i know which intercooler i'm talkin about....and yes, i know about the top mount...

[Siddhartha]

AH!!!! ^_^;;; you meant flow direction, lol, silly me, my bad, Doc . . .

[dohctor_yaj]

its koo man...i'm just in a bad mood today cus the womans being a *****...errr...anyways, this should be left in the off topics forums though...

i should have made it more clear anyways...

[Siddhartha]

Lady problems, I dig, bro.

[chaosnite]

alright so I'm leaning towards the RB25 because I'm looking for more low end power than topend - i'm sure the extra displacement and higher CR helps with this.

Any suggestions for a turbo size? Whats the most HP I could make if I ported/hiflowed (same thing right?) the stock rb25 turbo?

[chaosnite]

correct me if i'm off more than 100 but does this look like an avg estimate of total upgrade price if I were to buy:1) FM IC 10002) profec b 4003) 555 injectors 4004) 255 fuel pump 300

total: 2100

[93semax]

3) 555 injectors 400[/QUOTE]

Where did you find 6 side feed injectors for 400? The rb25 uses side feed injectors and they are much more expensive than top feed. You probably looked up 555cc top feed injectors, in that case you're going to need a top feed fuel rail and resistor packs. If they are side feed it's a good find. Don't forget an upgraded MAF.

[Bryson]

your way off on those prices. Get the intercooler Night sells, 500 for the intercooler, 350 for the pipes and it seems to be a really good one. Buy a used profec B off ebay. Jesus for 400 you could get an E-01. Also, your injector price seems really low like semax said, and a 255 fuel pump such as the WALBRO is like a 100 bucks. If you take money from what you overpriced and add it to the injectors, you will probably be somewhere close with that estimate.

[dohctor_yaj]

i'm guessing the injectors for the rb25 is more like $600 huh? cus i know the top feeds for rb20 is more like $450...and like bryson said, the walbro 255 is like $110 shipped, you can get a profec b on ebay for like $330, or HKS EVC IV for like $280, front mount intercooler off ebay for like $350 shipped for a nice one brand new...

other prices: (please correct me if i'm wrong)...

Z32 MAF = ~350???

Upgraded ignition like MSD = ~ 300???

[Siddhartha]

profec b? whats that?? and why don't ppl go with power FC, is it more expensive?

[rogue]

Proftec B is a bost controller. the power FC is a standalone ECI for the said engine. Boost can be controller through the PFC by buying an add on kit or by using your own (such as proftec b).

Also z32 Maf = 100 avg. not 350.

=0

[Siddhartha]

w00t, thanks rogue

[dohctor_yaj]

wow, maybe i was at the wrong place but i swore i've seen Z32 MAF's going for like 300+ on ebay some time ago...daym...

well, if thats the case, then i'm hearin more good news everytime i come here

[chaosnite]

yea I had priced the same sort of upgrades for a different car project and used retail price- oops- guess i'm in a different ball park now. I should have done a little more research, but thanks for the replies.

so 555 are the injectors I would need for 400bhp and they run $600? I think I'm gonna go check prices for the power fc and see if it's cheaper to get that with the boost controller or buy the "profec b" separately.

seeing as how I'm out to save $$ I'll be buying piece by piece, but are there any turbo upgrade kits out there for the skyline that you guys would recommend for my power goal?

[Redline240]

seeing as how I'm out to save $$ I'll be buying piece by piece, but are there any turbo upgrade kits out there for the skyline that you guys would recommend for my power goal?

Yeah, a RB26!!!

[dcdrifter]

Thats a way to save $.

[ZERO]

I'm goign to try a different route. I'm goign to try and get as much power as possible without raising the boost. I have seen it done in Porsches. I know somebody back home who got his late 80s Porsche 930 from 268hp to 500hp without raising boost. However that does not mean he did not upgrade the turbo. That car runs 13 psi stock if I remember correctly.

I think this is an interesting way to go just to stay away from the problems that come with raising boost...

[Aztek72]

No matter how you slice it, making 400hp WILL NOT be cheap, regardless of which poison you pick.

The SR's an awesome motor but for it to make that kind of power and to do it semi-reliably and cheaply is darn-near impossible.

I'm also curious as to why you have to have 400hp. Even with 280hp that car boogeys.

I'm personally going with an RB26 because of high-hp reliability and responsiveness to mods. With a few mods here and there, this motor will easily make 400hp BUT the motor and transmission alone cost me almost $5000

[chaosnite]

well I guess I've always dreamed of being able to keep up with the hi-end sports cars like corvettes, porsches, bmw, vipers

.. but you guys bring up an interesting point. with the engine and mods to get to 400hp costing around 5k it makes me wonder how much power the rb26 can make on a stock fuel system and turbo. any thoughts?

[themadscientist]

my freind wicked up an RB25 with an HKS gasket, GT-R intercooler, SAFC and AVCR set to 13lb up to 300hp. 400hp on a 25 is easy, he just needed more fuel and a bigger turbo.

[chaosnite]

whoa.. Night you said 325 whp is easy? is it mostly in the tuning or what? i know the rb25 comes with 250whp stock so any clues as to where the other 75 comes from-- well I mean besides turning up the boost. stock cams right?

[chaosnite]

damn, thats exactly what I wanted to hear Night! muahaha omg I can't wait till I have enough money.. Is this single shaft driveshaft something you did yourself? -- as in if I bought the engine from you could you make me a good deal on one?

[Toad[^_^]]

AH!!!! ^_^;;; you meant flow direction, lol, silly me, my bad, Doc . . .

[>_<] NOT FAIR!!! HE DID MY FACE!!! THAT'S MY EXPRESSION! Oh well, maybe just this once [^_^]

Anywho, someone give me the gauge, length, and type of piping necessary for the RB25DET intercooler swap... thing. Yeah... [^_^]

Love this site http://www.roadraceengineering...s.htm

[Toad[^_^]]

I just need the specs