The AUSubaru.com.au Forums

Trying to calculate right size LPG gear for turbo EA82, redline RPM and horsepower comes into play.

What is a realistic max revs anybody ?

The FSM quotes a power measure called PS of 113 for Oz and 136 for elsewhere

dunno which one mine is, need to see camshafts marking


What the ...? is PS ??

just found it in one shot at google. It is short for PS, which is short for Pferdestarke, which is German for horsepower

( 4 years of German classes and I never struck the word for horse !)

113 PS = 111 HP = 83kW
136PS = 100kW

Redline will be just before the engine flies apart

Realisticly, you shouldnt need to rev the engine any higher than where the engine makes maximum power, so that is around 5200 rpm. There is no gain to be had from revving higher than this.

Im not sure when the rev limiter kicks in

Engine redline depends more on cam grind than anything else but around 6500 is about where the turbos are supposed to redline at

my old turbo L series revved out to 6500,,,,was noisy and vibrated a fair bit but stauyed there....wouldnt want to go that high very often either

alrighty, thanks. The tacho red starts at 6500 and goes all the way to 8000.
If max power comes in at 5600 or 5200 depending on origin of motor or camshafts anyway. Just need to calculate to eliminate chances of leaning out due to mixer sizing.

so whats the differences in camshafts???? this is interesting

113 PS [horsepower] V 136 PS [horsepower] it would seem. Camshafts do have some markings to differentiate them(allegedly)

timmo wrote:so whats the differences in camshafts???? this is interesting

MPFI and MPFI turbo apparently have different cams. the turbo ones open sooner or hold the valve open longer to get as much in the cylinder as possible... something like that, i haven't looked into it though.

This is one of the questions i have about turbo'n a standard MPFI on low boost, leave the cams or change them? If they were to be changed, wouldn't this confuse the standard MPFI ECU? I've heard that the MPFI ECU can handle a turbo so long as you keep an eye on the fuel air mixture or something like that. True or false? Discopotato, i know little about turbos other than they ram air and fuel into the cylinder through a turbine spun on exhaust gases, i'm sure you'd beable to elaborate better on this... Someone would anyway...

Cheers

nahh i mean physical differences between the two typers of turbo camshaft. ie I have some jap spec cams, would it be so simple that if i put these cams in my aus spec engine it would deliver more power???

oops sorry to hijack ur thread jonno

timmo