what's factory redline on RB25?

[IowaRB240SX]

Searched and came up with nill.

[Yellow4g63]

6800

[S13 240SX]

WOW THAT'S IT????

[eh?]

More like 7-7.1k

[silent dave]

WOW THAT'S IT????

how high do you need it to rev? seems like plenty when you're driving it

the dyno told me it cuts at 6800

[S13 240SX]

i'm pretty rev happy.. so anywhere above 7k to 7,500-8k is how high i want.

[eh?]

Then buy a pfc/cams/turbo. Max stock power is around 6500 rpm, no reason to go higher when stock.

[S13 240SX]

cool thanks... I been thinking of saving money for rb20 or 25.. i would prefer the 25 but I can see that is gonna be a butt load of money.. I was just searching the price for the mckinney motor,trans mounts, and driveshaft and my god just that alone is gonna cost probably as much not more than the rb25 engine/transmission/ecu/and wirning... is there any other places I can look for the mounts and driveshaft for cheaper than 500 600 bills.

[eh?]

http://www.tophatperformance.com for cheap mounts ($375) and have the driveshaft made at a local shop for around $300.

Doh, sticky right at the tophttp://forums.nicoclub.com/zerothread?id=167273Mounts for $340 shipped.

[S13 240SX]

thanks.. last thing.. how would i know a local shop makes the driveshaft right? do i need to give them specs, length size, ect...ect??

[eh?]

Yes you would need to make measurements. You'd have to call the specific shop for details.

[Sandy sx]

i'm pretty rev happy.. so anywhere above 7k to 7,500-8k is how high i want.

Ehm....

Buy a honder.

[Carl H]

if you want revs go for a rb20 lol...

[S13 240SX]

ehhh yeah but can rb20 make 500hp on stock internals... thats why i was thinking of rb25 because its more power stock and I read can do 500hp on stock.

[BoostFab]

borrowed picture of DETurbine's rb25 cluster

[eh?]

I think someone tried to make big power on an RB20 but they put holes in the pistons

[Carl H]

I think someone tried to make big power on an RB20 but they put holes in the pistons

bAzing!got me there, but my motor wasnt in the best condtion when i got it, a$$ in japan who owned it put this silly timing map in the car, so it had some prior damage going before i got my paws on it.least i didnt bust my ringlands :p

[blues14]

If you want 500hp, your gonna want to build your motor rb20 or rb25!! these are both strong motors that can handle power increases but, If you want big power.....you will spend big money. people think my goals are low cuz I only want 250whp on my rb20, but that power can be made while keeping it very RELIABLE. I dont own a shop and i sure as hell dont wanna rebuild my engine on a regular basis. my 2cents

[eh?]

You don't have to build an RB25 to handle 500hp (400-425 whp).Keep your rev's below 8k and knock in check....

[Joe]

You don't have to build an RB25 to handle 500hp (400-425 whp).Keep your rev's below 8k and knock in check....

definatley

450ish whp seems to be about the safe "reliable" limit for the rb25.

[S13 240SX]

and for rb20 that can handle what 300-400hp on stock?

[Carl H]

rb20 should be able to hold 400whp no problem assuming you have a proper tune and the engine is in good nic, which unfortunatly mine wasnt...

[240SX GT-S]

eh? on your dyno sheet it says you made 220whp on 8 lbs and a stock ecu. what else was modified?Sorry a little off topic...

[eh?]

It's not my dyno sheet, it's the test mule for AEM.Here are the specs"The exhaust was approx 2.5". It was a budget replacement exhaust. Nothing exotic. It had a 2.5" cat. The intercooler was the stock R33 GTS-T"

He then made over 300whp @ 8psi with a Greddy im, fmic and exhaust...

[Yellow4g63]

borrowed picture of DETurbine's rb25 cluster

Yeah we all know how accurate the factory tach is. My friends PFC came programed at 6800, my RB20 PFC came programed at 7500.

[Kansei240sx]

It's not my dyno sheet, it's the test mule for AEM.Here are the specs"The exhaust was approx 2.5". It was a budget replacement exhaust. Nothing exotic. It had a 2.5" cat. The intercooler was the stock R33 GTS-T"

He then made over 300whp @ 8psi with a Greddy im, fmic and exhaust...

Minus the EMS, thats what i have mods wise. Ill have an AFC wired up shortly to get it tuned better.

[eh?]

AFC is worthless on the RB25. You need something that controls timing too...

[240SX GT-S]

thanks for the info. I'm trying trying to get a feel for what I should expect to put out. I have a friend that just got his sentra tuned and put 200 to the wheels. All I want is more then that...

[silent dave]

thanks for the info. I'm trying trying to get a feel for what I should expect to put out. I have a friend that just got his sentra tuned and put 200 to the wheels. All I want is more then that...

check my sig. 244 running just wastegate boost, 3" downpipe and exhaust, and stock sidemount. 200 is child's play for an rb25. my track runs were on 10 psi w/ 205/50/15 DRs 1.9 60'.

[240SX GT-S]

check my sig. 244 running just wastegate boost, 3" downpipe and exhaust, and stock sidemount. 200 is child's play for an rb25. my track runs were on 10 psi w/ 205/50/15 DRs 1.9 60'.

Well that is good news. And congrat on your numbers. What kind of drag radials are you using?

I wonder if I'll see a loss in power using a fmic before gettting mods on the engine.