HOWTO: RB25DET High Boost mode with standard solenoid

[paulr33]

wow still going

nice work

[nizmo_freek]

Done this a few weeks ago, great little mod, it gets rid of that peaky feeling and gives the car a smoother power curve.it is a bit dangerous in the wet tho hehe

Havnt had any problems so far which is good

Nice mod paulr33

[assyrian4evaa]

i have a question mite sound like a bit of a tool but anyway.. the 7 on the factory boost gauge is that 7psi because the unit is in mmhg or something like that so how do u convert it to psi?

[dezz]

+7 on that gauge is closer to 14psi...so 7 is about half way

[assyrian4evaa]

+7 on that gauge is closer to 14psi...so 7 is about half way

wat do u mean 7 is half way?

how wud u convert the mmhg to psi?

[Ultimategtr]

yep i did this mod like 2 weeks ago and its great! ran a wire through the firewall and attached it to a 2 way switch.. up for hi boost, down for low.. haha it works a treat! i dont use hi boost much any way.

ill post some pics up this week. its really really simple. took me umm 10 mins all up.

[dezz]

wat do u mean 7 is half way?

how wud u convert the mmhg to psi?

half way on the factory gauge is approximately 7psi

+7 on the gauge is ~14psi

[assyrian4evaa]

ohh k i get ya..

thank u

[JaiJai]

Looks good have to try it tomorrow just got boost guage

[seriesII]

i just have got around to doing this mod, and works like a charm, very easy, and i can feel the difference for sure, just to help, i have a series 2 1997 r33, it is the black wire. i just used rubber shrink tube over my wires and looks very neat and safe.. thanx for the mod info!

[seriesII]

half way on the factory gauge is approximately 7psi

+7 on the gauge is ~14psi

hey is this true?, when the gauge is up to +7 thats 14psi?, damn, mine has always went to the +7 and i do not have a aftermarket boost controller or blled valve?, any one know why this is happening?, i do not know all my mods in the engine, but there is a dump pipe that has one pipe going of the side to the same pipe and both sides going to exhaust?, i did hear a guy say the internal `waste gate was takin out?, but i dunno, havent looked and i cannot see any external wastegates any were? help?

[dezz]

if its hitting +7 all the time, and you have the stock turbo, then i'd start saving for a new turbo

or get it on a dyno and check if the gauge is reading accurately

[seriesII]

yea thats what i was just thinking, killed my friends wrx, so think im running to high.. hahah damn, thanx for clearing me up about the stock gauge, never knew that at all.. wonder why they just dont make the gauge to 7psi reading as they want you to run that

[dezz]

running more than 12psi wont really give you any more power, it'll just kill the turbo...

[seriesII]

hey dezz thanx 4 that. still shocked that the +7 is 14psi, ive always thought it was 7psi, hehe.. i couldent find any info on the net about the stock gauge and what nissan mean on there stock boost gauge reading

[dezz]

its millimeters of mercury or something like that

I'm running 12psi and mine doesnt even hit +7

[seriesII]

looks like im, boosting a bit to much,, hehe, found this: 700 mm/Hg, which is about 13.5 psi. and 400mm/hg is around 8psi.. cool i get it.. crazy factory gauge can go to 13.5. found some info after 3 hours of looking,,. just incase any one else wants to know and this happends while moding .. thanx dezz!!

Edited November 7, 2006 by seriesII

[Mid_Nite_R33]

just did this little mod, just did a T connection with the black earth wire and grounded it, it worked, its just a little mod for better response low down, its mnot gonna win u guys races, I dont know why you bother with the switches...not worth the hassle, if you want a switch get a in cabin dual stage boost controller.

Gr8 simple mod, cheers!

[ZiiN]

hey guys is this the correct two wires? jsut need to confirm before i chop the balc nad ground, its not clearly stated where it is locatted (im jsut assuming its this lot as it leads back to the actuator

[dezz]

thats the 1