Shaun

So thats the best we are gonna get from Stef, for apologising about his lack of psi and bar knowledge!!!!!!

Garyc,
It actually says that it was bored out to 2.2, not an ACTUAL 22b engine, so

Mark,
Your probably right......but then I will believe it when I see it!!!!! Strong internals or not, 32psi is some hell of an amount of boost to be able to hold (on any car!).......for longer than 2.2 miles. Oh and some people seem to forget that is meant to be mapped at 95 ron fuel...........Yeah righty

Shaun.

R19KET

Shaun,

Let's start off by ignoring ANY rolling road figures, and basing our "estimated power" figures, on "KNOWN" bench dyno results.

1) Nicky Grists car, whilst being a 22b, does in fact run a modded 2.0lt. Now 2.2lt.

2) Anders 22b.

Both of these cars were mapped by Bob Rawle, using a Possum Link, running 1.5bar (approx) through the low to mid range, dropping to 1.2bar (approx) at the top end, purely for safety.

Both cars got similar results, with circa 340bhp, and 370ftlbs.

Neither car runs water injection, front mount IC, or hybrid turbo.....unlike the car in REVS.

I would agree that mapping for 95RON would reduce the potential power of the car, but can you tell me by how much ????. All it means, is that the car mapped on 97RON, would achieve more.

Currently, in the UK, the Subaru "tuning market" is well behind some other countries, but most of the so called "technical info" that's bandied about, comes from people who have never even seen inside an engine, let alone built one.

This statement is not directed at the tuners who "have" both looked inside, and rebuilt an engine.......other than because they blew thing up in the first place

It won't be too long before 350bhp +++ Scoobs, are common place.

Mark.

robski

Guys,

why is the 95 RON bit so unbelievable?

I thought F1 cars used 95 RON stuff?
they produce a little over 300ish BHP dont they!?

CART use methanol, thats 1/2 the power from an equivalent amount of petrol, yet they produce massive BHP figures, they just use twice as much fuel than if they used petrol

robski

stage 1

I run 2.2bar in my stage 1 cossie everyday - no probs

The scooby truly is the new cosworth with 350bhp power claims coming common place!

Martin

Shaun

Mark,

I understand what you are saying, and do not dispute anything, but........

If 95 RON fuel was not a major contributory factor in NOT acheiving big figures, then why do ALL tuners (including the manufacturers) seem to state that SUL is required, for what it seems for any car that is => 280bhp barrier??

I'm only asking the question as this seems to be the fundamental floor in this article. Is it not the case that a higher than 95 octane fuel would definatley be required by a 2.2 ltr lump to run at 30+psi boost, as the engine would det to death??? Surely by decreasing ignition would lose mega power, by also the fact of increasing the fuel to combat det, would also lose mega power!

I know that other ways of combatting det can be used, like IC and WI, but can they really do it that much to deter det at 30+psi????

Perhaps i'm speaking garbage, and p1ssing down me leg, but I just find 375bhp on 95 octane, a bit hard to believe.

Can somebody educate me??????

Shaun.

R19KET

Shaun,

You can't compare running 95RON fuel on a standard engine, to running it on a modified engine, without knowing what has been done to combat det'.

One of the main issues, would be compression. If you were to lower the compression, this in it self would allow you to run more boost, and advance the ignition.

Much of the problems associated with running higher boost (apart from component strength), are due to the heat induced by the turbo. So apart from a bigger, or hybrid turbo allowing you to run more boost, and flow more air, it would also be far more efficient, and run cooler inlet temps. The inlet temps would also be greatly reduced by a decent IC.

WI serves two purposes. First is to cool the intake air, and cylinders, and secondly, it has the effect of increasing the RON rating of fuel.

WI also negates having to run excess fuel for cooling purposes.

I would certainly agree that mapping for 95RON seems to be defeating the object somewhat. It will of course reduce the ignition the car could be running, and effect the ultimate power.......and after the guy spent £30k on modding the car !!!!!! just to save a few pennies a ltr.

Mark.

GaryC

<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:<HR>Originally posted by robski:
<B>

I thought F1 cars used 95 RON stuff?

[/quote]

No - they currently use a 'special blend'. One of the FIAs potential power reducing tactics was to force them to use commercially available fuel.

Stef

Shaun.
It actually doesn't say that the car ever runs at 2.2bar, just that the ecu has the ability to. If he uses a two-stage boost switch, surely the car only ever runs at a max of 24psi?

Stef.

RonaldoH

With regards to fuel in F1, thats right as back in the day the Ferrari V12 was producing 800 bhp using toluene (part of TNT)

Perhaps if we can get some of that, it would be a right laugh!

Shaun

Stef,

Have you been reading that article over and over again, to try a find something to pick me up on???????!!!!!!

Shaun.

teknopete

Had a quick read of the thread guyz an the bit that stuck out waz 22psi an 14.? 1/4.
Thats bollox i run 22 psi an do a 1/4 in 12.8, some1s pi55in down legs. The Jun ecu s meant 2 have a guid map for 95ron, I almost fitted 1 @ the wend but couldnt b bothered waiting 4 the dyno.. mayb next time