Highest horsepower RB25 stateside?

[eh?]

Highest with proof period. Stock or modified doesn't matter. Anyone know?

[S14-NEO]

when I get my replacement engine here in the next week or so, i will be going to the dyno to get some retuning done ...ill be sure to post up my dyno plot of my bone stock internals NEO..

[streeteg]

Ill set the bar nice and low. 290 whp/243wtq. All stock. Awaiting a 3076r- but I wont really push it to hard. I think Z U L8r is up there. He had 440whp on a 3076r with a built bottom end @ 24psi.

[240z!!!]

due to respect of the forums i wont post a link to the actual forum itself but a fellow member of hybridz is running a rb25det in a 240z and was making 600 horsepower on completely stock bottom end...big turbo 200 shot of nos and all the normal bolt ons...

ill try and find a youtube video of the car

[rb26tommy]

yeah his name is jt. he lives in the next town over from me
Modified by rb26tommy at 10:07 PM 2/13/2010

[eh?]

I don't think Jtaylor dyno'd more than 600whp. He mentioned 594 in another thread but no sheet as proof. Post the link to hybrid Z if he did.

highest I know of is RBtally with 609whp stock long block.

[Monogato]

link or ban.

[boosted98gst]

I don't think Jtaylor dyno'd more than 600whp. He mentioned 594 in another thread but no sheet as proof. Post the link to hybrid Z if he did.

highest I know of is RBtally with 609whp stock long block.

I know for a fact there are 2 rb25 cars in columbus who own IPS motorsports who also own the worlds 2 fastest c6 vettes, that are over 650rwhp mark, Im not going to say numbers because I know it is higher then that now, I will ask mark and jason to join on here and post his info about the cars .

[OBTRICE]

4 years ago in the NOPI Drift Series there was a black Kouki on a full race mani and some huge turbo and he was said to be making like 701 or something. It sure looked like it, and the car was almost dead silent. All you could hear was turbo spool.

Im not sure where that car is or what it looks like now.

[eh?]

Looking for dyno sheets, video's or time slips+weight, not hear say.No proof= doesn't exist.I have a feeling nobody will top RBtally.

[Monogato]

Looking for dyno sheets, video's or time slips+weight, not hear say.No proof= doesn't exist.I have a feeling nobody will top RBtally.

Yeah for sure, everyone is telling stories but no one is showing proof.

I'm interested as well

[eh?]

RBtally @18psi. I'm sure he could do much more.

[flatrate]

600+ at only 18psi im assuming nitrous was used?

[Cjmartz2k]

Judging from the power curve, I'd say just a really big turbo, but it's one of those damn mph dyno charts so it's kinda hard to tell.

[RustspecS13]

Well the 5252 cross over is at about 87 mph...so yeah that's a monster turbo. Plus isn't he auto so that would take more hp from the whp reading?

~Alex

[Sil240]

Question. I've only been on a synopsis once with a near stock civic si and it was RPM vs HP vs tq. Why would you have MPH? ?To me it doesn't correlate to anything unless you know what RPM your car is at, @ X RPM.

[Cjmartz2k]

The SAU guys like mph because they say it reflects the way it performs in the real world better and you can more fairly compare cars with different gearing ratios which is stupid. Dyno's don't give different readings for different gear ratios. It doesn't work like that. Also, if you want to measure real world performance, run the cars in the real world. Take it to a drag strip for s*** sakes. People get on dyno's to compare hp/torque figures and curves and spool characteristics.

[WhatsADSM]

... Also, if you want to measure real world performance, run the cars in the real world. Take it to a drag strip for s*** sakes. People get on dyno's to compare hp/torque figures and curves and spool characteristics.

Thank you! IMO we don't race dynos around so who cares what your dyno number is.

I have seen plenty of cars that put down less peak dyno numbers but are a lot faster around a circuit or at a drag strip than a car with big dyno numbers.

As for why they read in MPH. Sometimes it is because the dyno is simply configured to do so since the user wants to see the values in terms of MPH....

Another case is that the dyno did not have a solid RPM pickup (especially true of the RB). Inertia dynos read the horsepower directly by noticing the acceleration of the weighted drum, and then they BACK-CALCULATE torque by having an RPM reference. If no direct RPM reference is available then you can calculate RPM by reading MPH and knowing the gear ratios to get motor RPM.

[Sil240]

Thanks for dropping some knowledge on me.

Def not a fan of the MPH, but it is useful as secondary info.But if I'm only getting one plot, I like my RPM.

[eh?]

Thanks Sil240 for starting a thread crap From what I've seen you can select between a mph and whp/wtq readings in the dynojet winpep software.

Look this thread is not for ranting about why you don't like dyno's. Please make another thread for it.

[Cjmartz2k]

Just to be clear, while I do value how fast a car goes much more than a dyno sheet, I still value dyno sheets a lot, just in a different way. I think they are a good tool to compare set ups and parts (turbos, engines, bolt ons, etc) just not the car over all, but I am VERY interested in comparing engine set ups just by themselves. They might not be 100% accurate when comparing different dyno's on different days in different locations with different weather and different dyno operators, but it's the best we've got and it gives you a good ballpark idea.

I was just stating I don't like using MPH on dyno sheets, not trying to crap on your thread....................can't race a dyno sheet though (sorry, couldn't help myself )

So what is the set up that made these figures? Pretty impressive numbers, especially for only 18psi. That must be a giant a** turbo. How high did he rev it? When did it spool? Man that mph dyno sheet is pissing me off.

[Sil240]

Sorry, didn't mean to poop in your cornflakes...

But... I've done some research for you.

Highest I could find.Dyno on page 2

http://www.skylinesaustralia.c...st=20

[Cjmartz2k]

Yeah, but he said state side. I know of couple RB25's more than 600rwhp in japan and don't forget about Regan in Peru. I think he posted on SAU at a bit over 600rwhp, and he had the mph to back it up.

[eh?]

Just to be clear, while I do value how fast a car goes much more than a dyno sheet, I still value dyno sheets a lot, just in a different way. I think they are a good tool to compare set ups and parts (turbos, engines, bolt ons, etc) just not the car over all, but I am VERY interested in comparing engine set ups just by themselves. They might not be 100% accurate when comparing different dyno's on different days in different locations with different weather and different dyno operators, but it's the best we've got and it gives you a good ballpark idea.

I understand why some people do not like dyno figures and I also said I was looking for slips+weight in the 10th post. Most people do not weigh their car and using trap speed alone isn't going to tell the whole story especially when the RB is swapped into so many different chassis and there are far more variables than you'd see with different dynos. So for what I'm looking for, dyno #'s will have to do.You can get repeatable results with different dynojets vs other dynos but that's another story.

[Cjmartz2k]

Can't disagree with any of that O yeah, didn't see where you asked for weight/mph in post 10. Sorry

[otightitzjim]

I know mine isnt probably near the highest, but i just wanted to post to see what you guys thought of it. I know it has alot more to give if i rev higher and feed it more fuel. This was just the 1st tune I could afford for now.

-gt3040 @ 18psi-6boost manifold with 44mm wg-fullybuilt except crank-tomei poncams 256 in/ex-warlbro in tank with 740cc-ect ect ect....




Modified by otightitzjim at 6:38 PM 2/15/2010

[synergy]

Very very nice. Id say 7500rpm and 22psi

Dont blow anything haha. I love how it holds max TQ to redline.

[meet07]

what is need to make more torque on the rb25?? im pretty sure one of the key factors is a small turbo pushing alot of boost...right??

[eh?]

More TQ where? down low or top end?

[otightitzjim]

Very very nice. Id say 7500rpm and 22psi

Dont blow anything haha. I love how it holds max TQ to redline.

thanks. I wanna throw her back on the dyno again and max out my set up. I just need to feed her more fuel. Its just this amazing economy thats stopping me from doing this. We'll see soon i hope.