Gotta say... not terribly impressed with the rb25 now that its finished

[kickertu]

a little background..

my car had a 500whp sr20 in itthen a 530whp 2jzgte

then a weak a** little rb! lol

mods on the motor- greddy intake mani (who doesnt have one these days)greddy 20g turbo kit750cc top feed injectorsq45 TBz32 maffmic3" exhuastintake14psi wastegate springtuned RB25DET ecu. tuned by Carl H. (yes its an rb25 ecu)s-afc for fine tuning.

had a MASSIVE boost leak that i was for some reason unable to find. i couldnt get it to hold over 9psi. finally found the issue, and fixed it.. now it holds 18psi like a champ. didnt go any higher, as the tester started popping out! lol

went out and fine tuned it a bit tonight, and got the AFR's dialed in to mid to low 11's. car runs and drives great, builds boost ASAP, and holds 14psi to redline. but the fast just isnt there. it was proficised that the car would make 350-400whp on this setup. maybe it is, and i just dont feel it, but it just doesnt pull as hard as i thought it would.

yes the timing is correct, and dead nuts at 15deg. the fpr is at a rock solid 43psi with no vac. Carl H handled the tuning, and i did the fine dialing. compression was checked and is good as well.

guess i just need to get a bigger turbo to go mucho faster? lol. i just worry about blowing the rings out if i push it too much further.

discuss.

[flatrate]

get a real EMS system... run something bigger than that baby d!ck turbo and crank the boost...

you just had 500whp and now you have maybe 350whp what did you expect?

BTW why on earth would you get rid of a 2J setup?

[kickertu]

why would this be locked? its not breaking any rules. im expression my opinion.

yes the turbo is tiny. i have thought about a full standalone, but no one around me can really tune nissan. my Evo has AEM on it, and it drives like a stock car because we have a great DSM tuner in our area.. nissan isnt so much the case.

[eh?]

[Joe]

its a 20g.

what were you expecting?

of course its not gonna be impressive compared to a 500whp ANYTHING.

[Bluefire]

why would this be locked? its not breaking any rules. im expression my opinion.

yes the turbo is tiny. i have thought about a full standalone, but no one around me can really tune nissan. my Evo has AEM on it, and it drives like a stock car because we have a great DSM tuner in our area.. nissan isnt so much the case.

any decent tuner can tune the older nissan motors. Theres really nothing special they need to know.

[boosted98gst]

What I want to know is how are you running a AFC and controling 720 cc injectors?

[boosted98gst]

What are you using to data log your runs? did you tune on a dyno?
Modified by boosted98gst at 11:41 PM 1/6/2010

[boosted98gst]

why would this be locked? its not breaking any rules. im expression my opinion.

yes the turbo is tiny. i have thought about a full standalone, but no one around me can really tune nissan. my Evo has AEM on it, and it drives like a stock car because we have a great DSM tuner in our area.. nissan isnt so much the case.

This is Bs because I run a AEM in 06 evo also and anyone that can tune or is cert to tune Ie AEM/ Haltec can tune the system. Its almost the same program just in a different car. Are you trying to say tuning an EVO on a dyno is more different then tuning a NISSAN on a dyno? because its not.
Modified by boosted98gst at 11:42 PM 1/6/2010

[robbie2883]

my thoughts exactly

[kickertu]

I guess you missed the line that says it has a tuned ecu?

Im not using anything to data log. im reading the wideband as i drive it.

I guess telling you guys that your end all be all motor isnt the greatest thing on the planet really ruffles some feathers!!! LOLOLOLOLOLOL

[Eikon]

Get a bigger turbo and try again.

I fail to understand why you dumped a 2JZ_GTE for an RB25... And now you're complaining that it's not fast.. of course it's not compared to what you are used to.

Still, you can make good power on a RB25 with a turbo big enough.

[kickertu]

This is Bs because I run a AEM in 06 evo also and anyone that can tune or is cert to tune Ie AEM/ Haltec can tune the system. Its almost the same program just in a different car. Are you trying to say tuning an EVO on a dyno is more different then tuning a NISSAN on a dyno? because its not.

Modified by boosted98gst at 11:42 PM 1/6/2010

tuning a car isnt rocket science. we dont really have a good dyno here. the one we do have breaks up all the time, the brakes are shot, and the computer is older than me. plus the owner is a real arrogant a** who things he can charge as much as he wants.

I had one of my old built sr20's tuned on aem by the tuner in our area. the car ran ok, but he admited he didnt know nissans well and wasnt terribly comfortable with it. granted that was a few years ago, but meh.

I have thought about a full standalone, but not sure i care enough about the car to do so. id rather focus on the evo.

[Joe]

I guess you missed the line that says it has a tuned ecu?

Im not using anything to data log. im reading the wideband as i drive it.

I guess telling you guys that your end all be all motor isnt the greatest thing on the planet really ruffles some feathers!!! LOLOLOLOLOLOL

dude not to defend the RB, because it is BY FAR not the best engine on the planet

you made a stupid comparison. youre 150whp shy of what you are comparing it to. thats like comparing a stock KAe to a stock RB25.

[kickertu]

I realize its apples to oranges. thats fine, i just figured it would be a BIT faster than it is. if the dyno in my town wasnt a pile, and the owner didnt charge so much, i would dyno it to see what kind of power its making.

Carl H is sending out a new flash to clean some things up, so that might help out a bit.

[kickertu]

Get a bigger turbo and try again.

I fail to understand why you dumped a 2JZ_GTE for an RB25... And now you're complaining that it's not fast.. of course it's not compared to what you are used to.

Still, you can make good power on a RB25 with a turbo big enough.

I dumped the 2jz because the car was stupid stupid fast. i didnt have the money to support that beast at the time. i didnt have enough tire, so the car went sideways in 3rd gear. almost hit the wall on the freeway.

i parted the car with the anticipation to sell it and be done with it.. then the shell didnt sell, so i picked up the RB for a good deal when all the 2j parts were gone. not sure if i want to sell it now or not. its hard to find a kouki with only 62k miles.

[neonbomb]

Reading this makes me happy because you wasted money on a smaller motor.

[boosted98gst]

Just because you are saying the o so great RB is not as great does not hurt my feelings one bit, Its a 15+ year old motor for god sake with there own pro's and con's. Comparing a well tuned custom dyno tuned car for a mail in ecu flash is like apples and oranges. I did see you have a ecu flash type unit, but for a AFC to even control anything over 660cc the unit can not do well or at all. What type of maf is in the car? I am not cert but I do all my tuning on burshur's dyno on my own car/ , been friends with dave for over 10 years Even after driving my evo then drving my friends XXX whp RB car its night and day too, in my eyes I have yet personally drive or ride with any other car that opens my eyes like a tuned evo does.

What size fuel line from the tank to the rail? what kind of rail? what mm? what kind of injectors? What kind of pump ? What kind of turbo was on the sr and jz motor?
Modified by boosted98gst at 9:21 AM 1/7/2010

[boosted98gst]

Hey guys I just bought a civic hybrid and im wondering why its not as fast as my c6z06........

[kickertu]

Just because you are saying the o so great RB is not as great does not hurt my feelings one bit, Its a 15+ year old motor for god sake with there own pro's and con's. Comparing a well tuned custom dyno tuned car for a mail in ecu flash is like apples and oranges. I did see you have a ecu flash type unit, but for a AFC to even control anything over 660cc the unit can not do well or at all. What type of maf is in the car? I am not cert but I do all my tuning on burshur's dyno on my own car/ , been friends with dave for over 10 years Even after driving my evo then drving my friends XXX whp RB car its night and day too, in my eyes I have yet personally drive or ride with any other car that opens my eyes like a tuned evo does.

What size fuel line from the tank to the rail? what kind of rail? what mm? what kind of injectors? What kind of pump ? What kind of turbo was on the sr and jz motor?

Modified by boosted98gst at 9:21 AM 1/7/2010

the ecu is tuned for the 750 injectors and the z32 maf.

for the 2j i ran new -6an lines because the fuel has to come to the other side of the engine when compared to a nissan motor. the sr, and rb are using the stock lines, with -6 from there to the rail. walbro 255 pump2j had stock injectors (maxed)sr had precision2jz had a 71mm turbosr had a 3076r

and again, yes i realize that it wont be as fast. your civic comment is f***ing retarded. i wasnt expecting 500whp. i was tihnking high 300's to low 400's on this setup though. or atleast thast what i was told it should be doing.

[DriftingisLame]

I guess telling you guys that your end all be all motor isnt the greatest thing on the planet really ruffles some feathers!!! LOLOLOLOLOLOL

The RB25 is the slightly fatter uglier sister to the RB26, you bought one of the cheaper nissan motor swaps.

Hardly "end all be all".

[EJ8 944]

The RB25 is the slightly fatter uglier sister to the RB26, you bought one of the cheaper nissan motor swaps.

Hardly "end all be all".

x2, should've gone with a 26

[240z4u]

x2, should've gone with a 26

These threads kick a**, RB motor are not the end-be-all by any stretch. I am referring to ALL RB motors including the 26. Your nuts to have pulled out the 2j instead of turning the boost down.

You gave up a ton of torque, and that is why the car doesn't feel as fast besides what you mentioned above.

[boosted98gst]

There has to be something wrong with the tune or set up, does the 20g from greddy only come in one trim? Because the car should still be somewhat quick. 10 years ago I was running the fp20g on my 1g awd and made 440awhp and was trapping 130+ on pump gas with a 2 liter. Ton's and ton's of people have gone 10's with a pump gas full weight car starting when the turbo was really big into the car scene in 1997.

And the rb is def not the greatest motor, the 26 is decent but nothing worth what they sell for here in the states.

You have dyno proof of this dyno 500whp sr from a gt30?

[eh?]

or atleast thast what i was told it should be doing.

And that is part of the problem. Your "tuned" ecu is another.

[USMCgetsome]

i

Get a bigger turbo and try again.

I fail to understand why you dumped a 2JZ_GTE for an RB25... And now you're complaining that it's not fast.. of course it's not compared to what you are used to.

Still, you can make good power on a RB25 with a turbo big enough.

i'm with eikon but kikertu your crazy for letting go of that 2jz. Hell i'd trade my rb25det for a 2jz any day of the week 2.5 vs 3.0 come on bro!

[flatrate]

reading this thread makes my head hurt...

Your retarded /thread

[kickertu]

reading this thread makes my head hurt...

Your retarded /thread

If you are going to diss me, at least spell You're correctly. Dips***.

[kickertu]

I got rid of the 2JZ because i wanted to sell the car. the 2JZ was fully built, and i couldnt get what i needed out of it, so i parted it. i made more than i wanted back. then i had the shell laying around and couldnt sell it. found the rb for a good deal, and put it in. now that its in and running, im debating selling it or keepping it.

eh?- im working on it. i may go standalone, but again, i am focusing on my evo right now, and getting it ready for the autox season. once i get rid of my new coils, get my new ones, get my rcomps, and new wheels, i will start spending money on the 240 again.

I havea 20G on my evo also, and the evo would eat the 240 for lunch.. and no not just from a stop. if we did a roll race, the evo would walk the 240..

I will work on a few other things, and see if i can get it running a bit better.

I'll see if i can find any of the old dyno sheets. the SR made 407whp at 15psi.

[boosted98gst]

Yeah my 240 is more of just a fun project for me and my dad to tinker on nothing crazy , If you're looking for something with just brute power and all around car, just put more money in your evo and get rid of the 240. Last year I reached every goal I wanted to in the evolution. My evo 9 still holds the pump gas record in the US as of 1/9/10, the car went 9's back to back to back being 100% street driven on street tires, I drove 100 miles each way to the track, I drive it to work on nice days (garaged during winter ), I have navigation in it, I have the oem sub in the back. do not get me wrong the 240 is fun to play in, its a car and motor hard to become very competitive in.