Jigsaw

So, I want to know what's the maximum horsepower out of a stock 13BT on stock turbo? Anyone know?

Also, any videos/pics/info on some high horsepower 13BTs?

Bukwild

Check the dyno section and single turbo section. 2 years ago everyone was shooting for 400rwhp but now that tuning is light years ahead. So now that big goal is 500+
But where ever you find these crazy hp numbers you will usually find a precision turbo under the hood.

J-Rat

iTrader: (2)

Based on the numbers I got from a stocker, I would say that around 250 would be the absolute limit, and I may be being kind at that. That unit is made for spool, and it will run out of breath fairly quickly on the top end.

Like bukwild said, I am making 400 on a stockport, but its with an aftermarket turbo. That stock one just isnt worth crap..

RyosukeFC3C

There's a few 800+ hp 13bs in Australia

J-Rat

iTrader: (2)

On a stock turbo? I highly doubt that..

Whizbang

yeah people arent reading well.

the block isnt the limitation as much as the stock turbo running out.

arghx

iTrader: (3)

s5 can definately do more than 250. a friend of mine is doing 250 at 8psi w/ a front mount and aggressive street port. max on an s5 turbo is probably closer to 280.

J-Rat

iTrader: (2)

We have dyno sheets for those claims?

classicauto

iTrader: (3)

I doubt that, the S5 turbo isn't THAT superior to an S4. Best results Ive seen on a stock turbo (S5) and stock ports was 232whp with an old school greddy frontmount. But Im with J-rat - post a dyno sheet from this "stock turbo" pull and Ill eat my words kindly.

prjct87rx7

iTrader: (7)

i hit 215 at 5500 rpm on a stocker. but my timing was soooo off i blew the motor before i got into "our" power ban..

Bob Boberson

iTrader: (3)

Though those numbers seem very high, he said a stock 13bt motor which I would think would not include any porting.

13bpower

My old car/motor is pushing around 315-320 at the flywheel on the stock s4 turbo, high comp rotor (9.4), and mild streetport, stock IC as well and a 1.7 Rtek. That is at 13 psi. A FMIC would push it a little higher.

bacek

^even if flywheel numbers i still doubt that claim

Whizbang

porting = not a stock block

gosh!

p4nc7

iTrader: (1)

256 rwhp. It's believeable.

13bpower

*yawn*

I built the engine, and it has been dynoed back to back with bran new stock cars to verify the flywheel HP.

Doubt all you want. 50 people were there and jaws dropped when a stock turbo T2 put down more power than EVERYONE at the event. If anyone wants to know how its done, just drop me a line

classicauto

iTrader: (3)

ahem, but 9.4 rotors, mild streetport and an R-tek chip do not make it a stock TII.....and 310 brake is about 250 to the wheels....so its right at the top of stock achieveable numbers, except its got all those other helpers.

13bpower

Never claimed it was a stock T2, that is why I listed the mods, so people wouldn't assume it was. Just giving some #'s for comparison and perspective. 260 to the wheels is about correct.

250 to the wheels on a stock port motor and stock s4 turbo is possible..... with fuel and tuning. But that wouldn't be stock now would it?

J-Rat

iTrader: (2)

Okay boys, lets review:



If someone has a 250+ DYNO sheet on stock ports/stock motor/stock turbo, lets see it. Until then, this is all talk..

rotorforce

^I guess some people just don't read the origional post before they speak...

RotaryEvolution

iTrader: (30)

wtf does it have to do with this thread then? you're just bragging and even the bragging is hardly believable.

13b4me

A stock 13BT would imply being stock from the airbox to the mufflers... In that case you wouldn't even have a ported wastegate, so anything over 200whp is pretty unfathomable... I guess you are all wrong then huh...

On a stock block meaning stock ports, allowing a ported wastegate (stock turbo) and mods I would say no more than 240whp...

For what it's worth, I made 260whp on a streetported S5 block with the "stock" turbo boosting 11psi... The question should have been more specific, for on a stock motor, turning the boost up isn't really an option... Oh wait you wouldn't even HAVE a way to control the boost!

EuroTrader

lower than I thouhgt it would be

running 10 lbs of boost

max power 180.3 @ 6500 rpm at the wheels

max torque 168.4 @ 3530 rpm at the wheels

This was on a MUSTANG DYNO
_________________
SPECS 87 MAZDA RX-7 TURBO II
Apexi 3in. down pipe,3in. exhaust (no cats),turbo timer,BOV,Super Airflow Converter,K&N intake,fuel cut defenser,Greddy 720cc Secondary Fuel injectors,Profec Type S EBC,255 lph Walbro fuel pump,Tein Super Drift Coilovers

Digi7ech

iTrader: (1)

I remember someone claiming somewhere around 275 a year or two ago.

It was a bit sketchy. I think 240250 is a reasonable number to see as a max.

Pretty much the max HP is limited by our turbo and IC.
The Turbo maxes out around 14/15psi. Anything higher and your pumping heated air and destroying bearings.

So the max power would be determined by running 14psi succesfully while keeping the intake charge cool.

As a reference.
My stock S4 motor with S5 turbo around 9/10psi dynoed at 180hp and 182tq @rw here in Phoenix on a 70-85 degree day.

13bpower

For some perspective. Sorry you find it hard to believe. It's not a matter of if it happend though, and proving it to doubters on the internet isn't high on my priority list. Have a good day.