rx7-rage

well thats what he ran it at, and thats what he got.....sooooooo. i forget what kind of core it is, but it has endtanks on the top and bottom of the intercooler, for some ok pics of the front of the car, and the engine bay go to http://speedracerrx7.50megs.com

erik

i'll try to get some more pics sometime soon

rx7_turbo2

That number seems a little high to me as well but as we know different dynos read differently. Chris Ng on the forum put down 273 to the wheels with a street ported motor and a To4b hybrid. A To4b hybrid and a To4e hybrid will put down roughly the same power (to4e slightly higher) because of how restrictive the exhuast side is. Allow the To4e to breathe a little better with a bigger exhaust side and it will desimate the hybrid, why? because the exhuast side is too restrictive, not sure how many times I have to say this.

TBoost

What trim are we talking about on a T04B? A S-3 trim wheel will put down 37lbs/min of air. A T04E-57 trim will put down 49lbs/min of air. Very significant. So we need to know what trim you are talking about before you state such things...

Hehehe, you can keep saying it all you want, but the results are already out. A compressor wheel is a bigger factor in HP than its turbine sister. I've seen some T3/T4 hybrids (smaller exhaust wheels and housings than a HT18), put out 400RWHP with T04E compresor wheels. Look at the Eagle Talons.

-M

Scott 89t2

around 250RWHP I'd guess. I've seen dyno sheets at 230rwhp @ 11psi with basic mods, stock engine.

eddierotary

iTrader: (7)

i hope to get at lease 200hp, heres my custom setup so far

84 gslse 13b 6ports engine with 90,000miles
88 tII turbocharger
88 tII intakes modified to fit in a gslse
2.25" intercooler pipes
greddy tipe s blowoff valve
small npr intercooler
3" intake pipe with a k&n filter
3" exaust with 3" dinomax cat and dinomax ultraflo muffler
550cc primary and 720cc sec injectors
botch fuel pump
and the halteck e6k or f10 ( not decided yet)

that basicly right now im planning to run. do you guy think i can get at lease 200 hp out of it? im planning to run betwen 10-14 psi.

Maxthe7man

While the air in factor definetly has a greater influence, the downside of the hybrid and the stock turbo is the exhaust side, the rotary needs to move more air than equivalent motors due to its mechanical nature, and the fact that thermallly,its an efficiency disaster, you can't compare a T3/T4 on a dsm to a turbo on a rotary, for the same reasons.
Realistically, 200-220 rwhp is the absolute reliable max power out of a S4 turbo, it just beats the **** out of the air so bad at higher boost levels, you would need to intercool the air far below that of ambient, to achieve enough density recovery to exceed those power levels.
I pushed my S4 to the limit on the stock turbo and at best it was 220 rhwp.
The S4 turbine is far to restrictive for elevated boost levels, you can pack all the air in you want, however reversion is a problem with excessive back pressure, when you have a backpressure problem, adding boost via bigger compressor sides, really just compounds the problem, the larger compressor, allows a denser charge, more lb/s min of air, however, now you have that expanded charge to deal with on the other side of the engine, it becomes a issue of deminishing returns, and is not anything resembling linear curve wise...
One glaring problem is that the S4 wastegate is hardly adequate at stock airflow levels, with the amount of gases moving to create over 220 rwhp, you boost stabiltiy and control will be nil.
Its easy to have big horspower dreams, its alot harder to make them come true..Max

rx7_turbo2

Where are the results? Don't compare DSM's to rotary it's two different things. Your To4e compressor is being wasted because your using the stock exhuast side, it's capable of so much more if you just open up the turbine side. I'm not sure you could see much higher than 300-320rwhp with any compressor size if you continue to use the stock exhaust side. Once again if you think I'm wrong feel free to prove it, you havent yet.

HIMNI Racing

This post is makeing me sleepy now.

RETed

I've seen stock turbos running 14psi making 230 at the wheels.&nbsp That makes it about 270bhp at the flywheel.&nbsp I haven't seen proof of stock turbos making much more than that - maybe another 10hp more at the wheels, but I've never seen a stock turbo make over 250 at the wheels.

Others will argue that you can run more boost, but my experience shows that anything over 14psi will blow the carbon seal within a week.


-Ted

jmseven

Ted...you are in the right area on HP's. My s4 on the dyno w/ simple mods, bost set @ 12psi, made 225hp to the rear wheels. Someone on the forum has my dyno sheet, it should be posted somewhere.

Yeah...anything above 12psi and you are asking for it. Well, that depends on your fuel mapping.