KW atw

[skit]

<div class='quotetop'>QUOTE (wide s13 @ May 21 2008, 03:46 PM) </div>Sounds like you put a fair bit of work into that motor.

Without trying to add undue criticism, the maths does not seem to add up here in my book. You say you used stock bigport injectors (185cc/min). Doing the BSFC calcs, for your engine to make say 190hp at the flywheel, you would need significantly more fuel than those injectors can supply. You would probably need around 300cc/min injectors (running at max duty cycle of 80%) to support this type of power. Even running at say 100% duty (theoretically) you would need maybe 250cc/min injectors.

Yet you said it was "overfuelling at high revs". How is this extra fuel getting into your engine? Even if you ran slightly higher fuel pressure, it still wouldn't support the claim.

I was of the impression that std bigport injectors cannot support any more than say 140-150 flywheel hp?

Would anyone care to verify this, I do not want to contribute garbage to the thread. The calcs are simple though - it takes so much fuel to produce so much horsepower. But the error margin tends to be greater when retrospectively approximating hp figures from the dyno.

On another note my car was just tuned to 74kw@wheels, using 200,000km old bigport, E8 haltech, gze injectors, quad throttles, kaizen 4-1's & 2.5" exhaust with a metalcat. It still sounds a bit high to me, but I'll take it. Can't wait to drive it.

PS Does someone in this thread really think they will get 180hp from a 4age without ever revving it over 5000rpm, turbo or otherwise???

[Konakid]

My thoughts exactly, i suspect a very high reading dyno.

I think someone was referring to the fact you wouldn't need to rev an F20C over 5000 to beat an n/a 4age.

[lo_rolla]

Damo - mine will be 16V.

If your goin 20V and don't have a head yet, send us another PM.

[DAMO46]

all interesting stuff..

hey damo don't you reckon 200whp is a huge number with little work??

also whats a good base to start lets say 5-10k engine build a blacktop 20v or the 16v?

[shelldrake]

I pulled around the 100 rwkw (running half stale fuel) using the following configuration-

Silvertop 20V
Blacktop quads
Trumpets and socks
Ported head
Port matched manifold
4-1 tuned length extractors
Trd head gasket
272 degree cams, can't remember how much lift
toda valve springs
Stock, balanced bottom end
Wolf 3d version 4
1zz coil on plugs
vvt still functional

Goes pretty well. I'll push another 5-10kw out of it after it's properly run in and tuned up. I have a few other things to test on the dyno too.

[FLT LNR]

****laughing at all the people questioning wide s13's power figures.

they obviously didnt pay attention to the fact the motor fucked a piston shortly after the dyno.

rofl 'he couldn't possibly build this motor.... bla bla....'

THATS RIGHT, BECAUSE IT FUCKEN BLEW UP.

jesus the guy was just telling you what happpened and the figures it pulled before it went bang.
climb off your know-it-all wagon and read all his fucking posts properly.

[Robo86]

^^cool your jets bud


mmm one day i will save up and build a tuff 16v

[wide s13]

<div class='quotetop'>QUOTE (jdm_dreamr @ May 29 2008, 03:09 AM) </div>thanks for the kind words mate.
it lasted 6months after the dyno daily drifting reving hard so i guess it wasnt strong enough lol
being rebuilt and that gear in the motor when i brought it i thought they would have put stronger pistons in but i was wrong
so now its at the builders waiting on a decision of what to use now so i can keep a nice power figure.
once rebuilt i will be aiming to hit the power figures again with more goodies and a stronger motor

[skit]

<div class='quotetop'>QUOTE (jdm_dreamr @ May 29 2008, 03:09 AM) </div>Settle down, no-one here has dished out any attitude except yourself. No one bagged out wides13 about the dyno reading.

The question I raised was whether the motor had enough fuel to reach such a power figure, which is based on thermodynamics, not blind skepticism. This is regardless of the state of tune & how long the motor lasted.

The thread title is "KW atw" - is the question not valid in this topic?

We all know that power produced depends moreso on physical limitations, than the extra kw's the tuner can dare to squeeze out risking the engine.

Peace out, have a beer :yes:

[ae71neo]

<div class='quotetop'>QUOTE (shelldrake @ May 29 2008, 12:39 AM) </div>Hmm interesting. I have a basically standard silvertop and i got 94rwkw.

I'm planning on putting some either 272s or 288 TODA cams/springs/pulleys/HG etc. and was hoping for something like 110rwkw. Do you think your setup will make that?

Also planning on some head work too.