700cc Injectors

[danoz]

does anybody no what rwhp 700cc injectors max out at

[Craved]

isnt the formula for a 6 cyl 1cc=1hp

so around 700BHP

[danoz]

whats 700bhp in rwhp??????????????

[Craved]

around 600 - 620

Edited July 24, 2006 by Craved

[danoz]

thats plenty for my rb26 now just need to find a turbo sett up either 25/30 or gtrs or gtss thats if i can find them for sale i want the 25/30 but heard there not making them anymore

[Swiper the Fox]

whats 700bhp in rwhp??????????????

bhp=brake horsepower or rear wheel horsepower=rwhp

so bhp=rwhp

we made 404 awkw with 2530's and 700cc injectors on pump fuel if thats any guide

[r33_racer]

I dont believe bhp = rwhp

brake horsepower is power measured at the flywheel as on an engine dyno

and rear wheel horsepower is that figure less any drivetrain losses.

So dirt garage made about 540hp at the wheels(4) on that setup.

Edited July 24, 2006 by r33_racer

[pkblade]

A general rule of thumb for (manual) drivetrain loss for newish cars is:

AWD 18%

RWD 14%

FWD 12%

So for RWD -

Given that 700cc~700hp

700hp - 14% = 602rwhp (~449rwkw)

[Swiper the Fox]

I dont believe bhp = rwhp

brake horsepower is power measured at the flywheel as on an engine dyno

and rear wheel horsepower is that figure less any drivetrain losses.

So dirt garage made about 540hp at the wheels(4) on that setup.

thats just outright horsepower as in hp...i was always of the understanding that bhp was at the wheels i.e. the brakes.

we also made between 443 and 467 on the same setup using race fuel.....depending on the day/dyno/boost levels.

[Beer Baron]

no, brake horsepower is the measure of the power without any ancilarries (no alternator, no gearbox, no air con etc etc). it doesn't have anything to do with the brakes

[Denver]

A general rule of thumb for (manual) drivetrain loss for newish cars is:

AWD 18%

RWD 14%

FWD 12%

So for RWD -

Given that 700cc~700hp

700hp - 14% = 602rwhp (~449rwkw)

No...

drive train loss is NOT A PERCENTAGE

its a pretty much fixed figure, give or take a hp due to oils/wear..

real loss figures are like this

AWD, it varies system to system, i believe the atessa setup sucks about 70hp out of it

RWD, 25-30hp

FWD 30-40hp

add to it you will lose more power if your driving an auto, but its about 10-20hp extra..

% loss figures are utter crap, and not to be believed, if your going to quote a %, use a sliding scale for loss compared to power, do not just have a flat % value as your loss, as its totally and utterly wrong..

Edited July 25, 2006 by Denver

[pkblade]

No...

drive train loss is NOT A PERCENTAGE

its a pretty much fixed figure, give or take a hp due to oils/wear..

real loss figures are like this

AWD, it varies system to system, i believe the atessa setup sucks about 70hp out of it

RWD, 25-30hp

FWD 30-40hp

add to it you will lose more power if your driving an auto, but its about 10-20hp extra..

% loss figures are utter crap, and not to be believed, if your going to quote a %, use a sliding scale for loss compared to power, do not just have a flat % value as your loss, as its totally and utterly wrong..

I realise the percentage calculations method is flawed but, its a quick way to get a good guesstimate.

BTW RWD has slightly more of a drivetrain loss than FWD.

[R31Nismoid]

No...

drive train loss is NOT A PERCENTAGE

its a pretty much fixed figure, give or take a hp due to oils/wear..

real loss figures are like this

AWD, it varies system to system, i believe the atessa setup sucks about 70hp out of it

Well thats not correct either

[Swiper the Fox]

no, brake horsepower is the measure of the power without any ancilarries (no alternator, no gearbox, no air con etc etc). it doesn't have anything to do with the brakes

cool...i can go home now....ive learnt something.

[2rismo]

The measure of an engine's horsepower without the loss in power caused by the gearbox, generator, differential, water pump and other auxiliaries. The actual horsepower delivered to the driving wheels is less.

[2rismo]

Engine dyno's use water and prony brakes

[Swiper the Fox]

Engine dyno's use water and prony brakes

Hey...stop it...you could have saved that one for tomm.

[Beer Baron]

yeah i'm a fountain of knowledge... well i'm a fountain of something. lol

i think SAE measured HP is done with all ancillaries for the car it is to be installed into and power is measured as what is being delilvered to the flywheel. it's more common now than BHP.

[PHaT MR30]

Is it PS thats measured with all accessories on?

[r33_racer]

I thought PS was a funky japanese form of power measurement stuck somewhere between HP and KW.