Whats The Cheapest Way To Hit 260-270rwkw?

[copycutter]

im running 294rwkw on 18 psi on std bottom end.. seems perfectly fine and AFR's are good.. getting new WG and coils and trying to hit to 300rwkw mark with out any more boost.

BU5TER's old engine i think was running over 330rwkw and had std bottom end for years!

so it can take it..

<{POST_SNAPBACK}>

Thanks Craved, definetly sounds similar to what i'm looking for out of my engine - but i didn't know the rb25 could take that much power with relatively high boost because of the 9:1 compression, which is comparitively higher than the other turbo nissans. How long has your car been like that for, and with the big turbo and airflow meter do you get any reversion problems with idle etc when clutching from above 3000rpm. The reason I ask is because I had a high mount turbo on my ca18 with an s-afc, with a short stainless pipe connecting the AFM to the turbo. And when i'd slowly wind any gear out (with or without boost) and then have to go to neutral for a red light or whatever, the cars idle would hunt like a mofo, even stall on the rare occasion. This could possibly be due to the piggyback nature of the s-afc as opposed to the standalone power fc i've got planned.

Cheers

Hey Tuna,

I will let you know how mine goes. Power FC, injectors, cams, GT3540(better match apparently than 3040 with no worse lag), fuel pump, 48mm pro-gate, split dump with removable pipe to screamer.  All getting done currently and should be ready early april.

Cheers

JB

<{POST_SNAPBACK}>

Hey JB,

DEFINITELY let me know how your r33 goes with that combination sounds absolutely awesome.. I might even lean towards a similar turbo to that if it works well top end:response wise. But I gotta keep myself in check. Its cool for the skylines to make this much power becuase they are very stable and well built cars, but im planning this kind of a setup in a 180sx, so its gonna be a 4-lane job when i put the boot into it :lol:

The best thing is the looks you get from the sr20 powered s13's s14's and s15's.. If you look closely you can pinpoint when the penny drops

First you get the look, then and then finally

B)

[R31Nismoid]

Guys, it made that power but it sure-as-shit didn't make it for long...especially the way Brett used to rape it.

exactly.

Thanks for clarification

HypeR33 - what spec if the gt35? Its just no possible to have a bigger turbo of the same family coming on as good as its smaller cousin

[copycutter]

and i thought the gt30r and the 2835pro s were capable of suppplying more airflow than a stock engine could hold?

[Nathan_G1]

im happy with my AX6, but ive got full forged internals, nothings been untouched.....340rwkw on 1.5bar, but i run it for drift on 1.0bar mite crank it up a little soon

[Roy]

exactly.

Thanks for clarification 

<{POST_SNAPBACK}>

Thereis always more to a story...and from what i understand the engine was happy at that power...dramas only startedwhen they leant onit further with fuel and tuning?????????????????????????????????????

[Craved]

Thanks Craved, definetly sounds similar to what i'm looking for out of my engine - but i didn't know the rb25 could take that much power with relatively high boost because of the 9:1 compression, which is comparitively higher than the other turbo nissans. How long has your car been like that for, and with the big turbo and airflow meter do you get any reversion problems with idle etc when clutching from above 3000rpm. The reason I ask is because I had a high mount turbo on my ca18 with an s-afc, with a short stainless pipe connecting the AFM to the turbo. And when i'd slowly wind any gear out (with or without boost) and then have to go to neutral for a red light or whatever, the cars idle would hunt like a mofo, even stall on the rare occasion. This could possibly be due to the piggyback nature of the s-afc as opposed to the standalone power fc i've got planned.

Cheers

<{POST_SNAPBACK}>

only been making that power for a few months now, and i havent been driving it all that much to be honest. my current wastegate is faulty and has some eratic boost pressures running through the engine because of it. so its not something i have been pushing til i get the new one and know for sure that only 18psi is going to run through it...

i do get the issue of stalling since im running a atmo bov, havent been arsed to work out a plumb back system with the aftermarket plenum... but thats an easy situation to resolve with some taps of the right foot.

known a few cars that run up near 18psi on smaller turbos and only making 240-250rwkw so it really looks like the bigger turbos are able to give the engine the extra air they need without pushing the limits of boost and the CR.. that said i am sure the cometic metal gaskets dont change the CR at all, but are more likely to hold up with a little more puishment than the std ones.

[copycutter]

i was told in order to correctly lower the CR in an rb25 you had to O-Ring the block. Not sure whether this is true though..

[mikymouse]

HOWEVER, everyone knows that the CHEAPEST way to 260kW is to cheat

Adrian

<{POST_SNAPBACK}>

What do you mean?

[R31Nismoid]

NO2 - known among the rice fields of wollongong as NOS

[nugget400hp]

i ran an rb25 in my vl.... had

masterpower T70 tubo, 38mm turbosmart gate on screamer, gtr injectors, 800hp fuel pump, GReddy plenum, szr throttle body, microtech ltx8, 3.5" from turbo back, el falcon coils, 600x300x90 frontmount......

360.8hp or 268rwkw on only 13psi, have dyno sheet to prove.

[Abo Bob]

i was told in order to correctly lower the CR in an rb25 you had to O-Ring the block. Not sure whether this is true though..

<{POST_SNAPBACK}>

Those two things are not really related. Getting the combustion chamber machined is the best way to lower the CR but a thick head gasket is cheaper and easier.

And regarding the comment about GT-RS being suited to SR20's. The GT-RS that goes on an SR20 is not the same GT-RS that goes on an RB25. It's smaller.

If I didn't blow my stock turbo and and get the GCG hiflow rebuild I would have got the GT-RS. I think it's a great match. Of course now I drool over the 2835 with the 0.87 rear housing.

255rwkw with cams at 0.9 bar in an auto says a lot for this turbo but it's not for everyone. Don't forget that the R34 has a larger rear housing than the R33.

[Sydneykid]

Hey Tuna,

I will let you know how mine goes. Power FC, injectors, cams, GT3540(better match apparently than 3040 with no worse lag), fuel pump, 48mm pro-gate, split dump with removable pipe to screamer.  All getting done currently and should be ready early april.

Cheers

JB

<{POST_SNAPBACK}>

And right there (APRIL) is a prime example of why so many people go for the GCG Ball Bearing high flow option. Forget 2 months, more like 2 days.

cheers

PS; not picking on HypeR33, he has a realistic time frame.