Rollinz

Right, we've all been quoting BHP figrues for some time against cars and I thought I should take the time to explain what these are

Basically the figure they are quoting is the most important factor about the
performance of a car...

bhp and torque are all very well, but the main figure that counts
is BARhp.. this is the figure that you tell your mates down the pub.


calculate this use the following rules:

STARTING POINT...
manufacturers generally handpick an engine that they know is on the right end of tolerances for testing this means that often its a higher figure than
an average engine actaully makes ignore this fact and swear blind that your 100k+ mile engine in sound song

(IMPORTANT RULE)
round up whenever possible, so 211bhp = 220bhp etc....

BOLT ON MODS
Obviously the correct way to get more power from your old engine with poor valve seal and rings that are about as tight as Freddy Mercury's

to get more power is to ignore those facts (see "starting point") and just bolt thing onto the engine and outside of it.

These mods can include filters exhaust dumpvalve etc
or even semi-internal mods like cams we wont clever things like bearings or rings cause those arent very shiney so you wont want to replace them

the manufacturers always state the gains that you will get from a mod often these wont be listed specifically with a power gain so just pick the biggest one that is..
e.g.
if a skyline can pick up 22bhp from an exhaust, then so
can your saxo
again dont forget the golden "always round up" rule
the figures should all be added up and round up again


ITS A GOOD'UN
you need to add a proportional value based on the "its a good'un" factor of your engine basically as this is YOUR engine not anyone elses its special so the mods will all make more difference so multiply the number up a bit to take this into account

STICKERS / SPOILERS
race cars have them so you need them too
the key thing here is to not buy ones that apply to anything you have fitted... go for stuff that isnt even made for your car
so Greddy/HKS/Blitz is ideal for a saxo
now the thing to remember with modifications to a vehicle is that they work in harmony with each other
it all comes together as a package exhaust will compliment head mods
filter will work well with a decat or whatever
now stickers are about attitude and attitude is what counts out there on the street (or McDonalds car park)
take the % of your car covered by stickers and spoilers and add that onto your BARHP figure as an attitude adjustment (dont forget to round up!!)



WORKED EXAMPLE:
saxo furio
quoted figure (use a guess if you dont know) 94bhp
filter (using the figure for a porche 911) - 11bhp
exhaust (using figure for a skyline) - 22bhp
decat (never had one so you get this without doin anything, awsome!) - 12bhp
sticker coverage = 47%
spoiler coverage = 12%
Its a good'un factor = 25%


We'll do the rounding first:
So the calcs are:
94 round up = 100
filter round up = 20
exahust round up = 30
decat round up = 20
sticker round up = 50%
spoiler round up = 20%
good'un round up = 30%

So 100 + 20 + 30 + 20 = 170
plus stickers 50% = 255
add spoiler factor 20% = 306
add good'un factor = 397.8

Final round up = 400bhp

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This however is only your basic Bar Horse Power figure, make sure when you quote
it you increase it inversely to the age of the girl you have with you at the
time, and in direct proportion to the number of pints you have consumed.

LukeDaisley

iTrader: (1)

Sounds about right.

lukeytheduke

hahaha they must have taken u ages to write.

P.s where can i got greddy stickers from!