stock turbos max whp?
 

hi,
do anyone know what is the limit in power for the stock turbos in non sec mode with pfc?
i am asking that because the seller of a car claims that has 360hp at the wheel on dyno.
the mods are:
removed cat and pre cat. greddy catback.
new intercooler.
i do not know about the injectors.
assume that he used the bigest ingectors he could .
pfc.

please note that the car is for street use. so i am asking the max hp for reliable and safe operation.

thanks

~360whp is the bleeding edge of reliability for the stock twins. Depending on the other mods the car has he's probably running about 14-16psi.

Did he say what kind of fuel he was using? That can make a big difference when you are that close to the edge.

360 on stock twins would be a pretty modded car. Exhaust, intake, intercooler, and injectors likely wouldn't do it. Engine needs porting etc. Typically those mods will get more like 300-320

without knowing the full mod list, it's hard to know if that number is real or not.

anyway, i made 380 to the wheels on the stockers...pretty modified though.

i've been running my twins at 1 bar for almost a year now. still boosting strong.

try a search this is often talked about

This has been covered 230813 times...

Right mods and a dynopack might get you there.

Ask at what boost level.

This largely depends on the dyno and settings tested...on a dynojet....you will be around 330-340whp.....on a Mustang dyno...300-315whp....Dynapack will get you 350-360hp...(measures at the hubs with wheels removed...) ....so take your pick...lol...but the true test is at the track...trap speed vs. weight doesnt lie... ;)

-Jack

I've only tried a mustang dyno and as you pointed out they will give the lowest rating. My car did 290whp @ 15psi. While I have not done the fuel pump mod I did hit 100% injector duty.

Without making some changes to the fuel system this is pretty close to my cars limits.

For what its worth with weather correction they said my car did 302whp.

Hello

Our latest experience, 408 rear wheel HP with Bosch Dyno.

1.0 bar boost
RE-A power expander
RE-A mid pipe
RE-A Tail Pipe
ARC Intercooler

quoting myself.

my 380 pull was on a Dynocom in-ground dyno.

http://memimage.cardomain.com/ride_i...0253_large.jpg

Can you elaborate on what the RE-A power expander is? That appears to be a lot of power for just full exhaust and intercooler upgrade.

really!!!!!????:scratch::scratch:

hello

Actually our Power Expander is very effective.
But Just replacing this downpipe cannot generate 400 HP + .
Today we set up one customer's cat with the same mods.
His car marks 402 HP and 47.6Kg.m torque.

what is this power expander .. do u have pictures of the setup
and what ECu and other mods are needed to get the 400 WHP ?
thx

Looks like a downpipe to me

http://www.rhdjapan.com/jdm-low/RE-A...D3S-RX-7-51134

Stock twins with standard bolt-ons making 408 whp at 14.5 psi?

That would be the highest number ever reported for stock twins. (And, if I recall, other ~400whp reports were running the twins at 18+ psi.)

/ Subscribed .. popcorn ready

Hello

I've received PM just about 400 HP+ and the Power Expander.

I have to say again, just replacing the Power Expander cannot generate 400+ HP.

But Our Power Expander is very effective.
With the stock downpipe, EX pressure is too high.
We have modified this downpipe some times.
Then, we can get the more power than before.

It appears to be a downpipe... albiet a very nice looking one. I'm sure it is very good, but I am curious to know how 400 whp was achieved with full exhaust and an intercooler upgrade. What sort of electronics/tuning was done?

What is your secret??!

Try giving a PM to GoodfellaFD3S.... he made somewhere around 421hp on non-seq

he might still remember all what he had.

weren't those B&R turbos?

yeah those were BNR stages III's, which aren't exactly stock turbos.

and wasn't he at 17 psi? not 14.7... HUGE DIFFERENCE.

The power expander looks a lot like an HKS downpipe designed to fit RHD rx7's, for LHD you aren't limited by space as much so sticking the largest possible DP would yield the most gains.

On RCC forum there's a guy making 329 hp @ 9 psi. Stock REW twins, all sequential stuff remaining on a street ported RE block, he's supposed to go back the 9th and try for 400 HP with more boost.

He made 421 using the BNR stage 3 non-seq's. He did that at 17.5psi with a street-port and, iirc, he stopped because he was running out of fuel.


I made approx 401whp (if my car were to be measured on a similar dyno to the one Rich ran his car on) at 1.2 bar with the BNR stage 3's run sequentially.

My car measured 340whp on the DynoDynamics brand dyno at Re:worx (British rotary specialist) in Portsmouth, England. I said initially my car made approx 401whp (vice 340) because, after asking around, I came to realize that the dyno I got my numbers from shows an average of 15-18% lower whp then the ones in the US.

My car had stock ports and MUCH more then just your basic bolt-on's when I hit 340. I'm just waiting to get back from the desert so I can get my car on a dyno to re-tune for American gas (used 94 octane in the UK) and get a print out of "American" numbers.

my car made 360whp@17psi non seq turbos stock. Turbos didn't last more a few months. This was on a dynojet. My friend;s FD managed 396whp@17psi. mods were streetport, pfc, bosch pump, 850cc injectors, intercooler, downpipe etc....

...just keep in mind inukai speaks for RE-A (if i'm informed correctly), so there should be no doubt in that rwhp... ;-)

And probably '99 spec twins, later Y pipe and other late model refinements if that helps them any...

'99 spec twins produce barely more power than the original twins.

Sorry, but 408 whp at 14.5 psi with basic bolt-ons is about 10-15% more than has ever been reported for this car on stock twins with equivalent boost. Even with BNRs and the like, getting to 400 whp requires a lot of work and more boost than that.

yeah i WANT to believe it based on his credentials... I WILL believe it when i see pics of the setups and a dyno sheet.

ohh and maybe the bosch dyno has something to do with it... not familiar with them at all

popcorn ready as well :)

As mentioned... most likely jdm turbos etc... higher octane. However, if boost is at 14.5 psi, the only other way they could have made power is to advance the timing or with a very good ignition system. Im curious as to how many degrees before TDC RE tunes to.

Also... sequential or non sequential?

"power expander"....... great marketing term for a downpipe :)

theres a lot of variables that will turn out 405 hp, the major one being the type of dyno thier using and the gas. there seems to be no secret addition he mentioned other than a midpipe downpipe ecu and intercooler and obviously jdm turbos so the 400 hp hes talkin about and that you're thinking of are two different things. the only way i can see stock twins doing that are

1. bnr turbos

2. non sequential

3. roughly 17+ psi

and imo running the stock twins that hard is too much if you want that kind of power get turbos suited for it like bnrs or a midsize single turbo

Hello guys


Many PMs from you.
But most of them say 'Dubious'

This is my final post for this topic.


400+ RWD HP with

14.5 boost pressure
Completely stock turbines. SEQUENTIAL
but many intake and EX mods.

We can go to all around the world to set up your car.
We have visited Hong Kong, Singapore, Australia, Korea, Thailand and so on.

We set up more than 50 FDs every year.

Regarding the dyno sheet, visit Amasan's weblog.

http://www.re-amemiya.co.jp/diary/

but all are written by Amasan in Japanese.

Could you vague it up a little bit more?

in the end its re-amemiya one of the most respected rotary tuners in the world, they've developed more parts for these cars than you could imagine, im sure they're capable of doing what they claim

Absolutely true... :)

From the blog (October, 2009):

9 What are the specifications from the customers issue a fine machine.
And I was told.
Engine is normal,
Port with the polishing stage,
I took the counterweight to balance.
Eainteku is put oche,
F & R to change to 70φ Intekupaipu.
Polishing stage with the exhaust manifold.
A 265-horsepower turbine for use in OH.
Expander & Muffler is manufactured with 90φ.
FD3S。 The boost-up has evolved every year FD3S.
cut-up vinegar.

Torque output is 402 horsepower at 47.6 kmーvinegar.

From what I can puzzle out with google translate- they're using S7 turbos (265hp turbine), ported, Intekupaipu (which near as I can tell is intake, throttle body, or intercooler), exhaust manifold work, down pipe and exhaust.

To clarify- their down pipe "power expander" has an expansion chamber a-lah:
http://www.froggy.se/skalmanmc/rd350/tuning/exp1.JPG

I've heard of users here doing that for wastegate efficiency but never scavenging.

are jdm turbos different than north american

As has already been covered in this thread (and countless times previously on this board), the differences are minor and the JDM turbos barely produce more power than USDM ones.

From that bit of translation it is apparent that there was some balancing and maybe porting and polishing going on in that engine
So quite possibly the ONLY thing stock on that engine was the turbos. With injectors and fuel mods and RE pushing the buttons on the tuning I'm sure THEY got those numbers.

Doesnt mean YOU can... Unless you want to fly Inukai and his boys in to hook up your FD

Hmmm... I had conversation with Ken from Shine about this today and had to read this myself..

I met Inukai and order things from him in the past.. But no way 1bar and 265HP turbo will make 400+ at the wheels with stock internal REW. Even ported motor, its hard for me to believe this as some ported engine with BNR stage 3, its hard to make 400+ at 1 bar.

Only way I could see them making 400+ on stock twin at 1 bar is if they put high compression rotors and tuned it conservatively at 1 bar to make 400+. But I wouldn't call that stock REW engine and its similar to how RX8 guys make mid 300s with 8lbs of boost.

Also, those japanese DP's aren't better than US DPs regarding flow.. So, I don't think it has anything to do with flow of the exhaust of RE-A..

maybe w race gas?? alky inj????

That in itself doesn't make power. Only allows you to run higher compression or more boost to make the power. Which as deals gap brought up is pretty much impossible on a stock engine at 1 bar on stock turbos, I agree.

Maybe with some nitromethane, or the use of Nitrous Oxide (N2O)....

Well, fuels like Q116 and Nitromethane do make more power because they carry more amounts of oxygen in them.