RB25 Vs SR20

Post by **S15_silvia** » Tue Mar 11, 2003 11:44 pm

which is easier and how much easier if i go with an SR20DET its gonna be form an s15 which has the same hp rateing so my question is is the RB gonna be alot harder? or are they gonna be about the same? well the s15 engine be any harder the lets stay the normal s14 engine?

Post by **S15_silvia** » Tue Mar 11, 2003 11:44 pm

so a rb25det will do 250 rwhp and 250 fwhp? so ther eis no power loss through the drive train?

Post by **Seaney_55** » Tue Mar 11, 2003 11:44 pm

S15_silvia wrote:so a rb25det will do 250 rwhp and 250 fwhp? so ther eis no power loss through the drive train?

i think that it's just a misrating in the hp.. the fly horsepower is probably much greater with the rb25det as it is in the rb 26dett. in the 26's case it is understandable because i thought japan used to have a tax cut for cars with engines that had under a certain hp.. anyone of you japan dwellers know if this is true? either way it makes sence.. explains why the same vg30dett in japan makes 30 less hp just underratting, not drivetrain efficiency..

Post by **S15_silvia** » Tue Mar 11, 2003 11:44 pm

well they have hp limits in japan i believe a car maker cant make their car have mor then like 280 hp i believe so they rate them at 280hp and sell them but after you buy it you can add all teh hp you want i believe its just it cant come from the factory with that much hp i could be wrong though

Post by **ZERO** » Tue Mar 11, 2003 11:44 pm

Its more like a gentlemen's agreement. In Germany the have something similar. No german production car is "supposed to" go over 155mph out of the box. However, Porsche refuses to agree to this and by consequence Ruf also.

Post by **S15_silvia** » Tue Mar 11, 2003 11:44 pm

yea thats what i thought in japan though couldnt they get shutdown by the government if they dont comply to the governments wishes? i donno what kinda government they have there but i thought maybe they could?

Post by **Projekt** » Tue Mar 11, 2003 11:44 pm

just fyi, what your'e calling fwhp (which i'm assuming is flywheel horsepower) is actually called BHP or brake horsepower.

Post by **meggala** » Tue Mar 11, 2003 11:44 pm

personally I prefer the sr swap to the rb alot easier.the rb does have more torque.meggala

Post by **Matthew** » Tue Mar 11, 2003 11:44 pm

Quote »so a rb25det will do 250 rwhp and 250 fwhp? [/quote]i hope by fwhp you dont mean front wheel.

Post by **mattback** » Tue Mar 11, 2003 11:44 pm

sr swap with the right mods can do 455 to the wheels on pump gas at 18 pounds.

rb25 probably can also but will be many times more expensive.and heavier.and less avialability for parts in usa.

Post by **Projekt** » Tue Mar 11, 2003 11:44 pm

wheel horse power and brake horse power. these are the correct terms.

Post by **S15_silvia** » Tue Mar 11, 2003 11:44 pm

how would the parts for an sr be any more availible in teh us then the rb? they both are imported from japan and the rb i want is cheaper then the sr i want so....

Post by **Projekt** » Tue Mar 11, 2003 11:44 pm

beause the SR to rb ratio in america is probably like 500:1

Post by **S15_silvia** » Tue Mar 11, 2003 11:44 pm

yea well thats changing and fast too.....

Post by **Projekt** » Tue Mar 11, 2003 11:44 pm

would you happen to have all the engine internals specs?

RB25 Vs SR20

RB25 Vs SR20

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