siman said:unless you are running upwards of 16+lbs of boost, the stock computer and 440's will be fine. Just make sure you dial up the fuel pressure for more fuel which is a greater duty cycle. Our injectors stock run about 80% duty cycle....hence my hypothesis that the stockers will be fine.
JBLMK3 ran 400whp on stock 440s and stock fuel pump with a FPR and a lexus afm.[/quote
john also knows how to TUNE. tuning is KEY. most new guys (myself included) dont know how to properly tune the car yet, hence MY point that you shouldnt be messing with the old injectors, trying to make them push a higher duty cycle unless they're proven that they can do so.
But if you car has like 100K+ miles on it and has not seen a rebuild on the full motor...I would advise you to upgrade the fuel pump and injectors and such.
or, dont try to push 400hp on a 120k motor! thats pressing your luck. at least check clearances and such, lest rodknock be rap tap tapping at your door. (read: block)
I am just going to dril out my afm this weekend ( got 3 days off) and see if I dont hit FC.....if i still do, well off to ebay for the lexus afm then.
drill it out how? to get more unmetered air in, like the lex? just curious.
-shaeff
siman said:Shaeff.....most of the general mk3 community wants cheap fast hp....we know are cars are not the most reliable motor wise so thats already taken into account ( hopefully).
But based on the past experiances with others, teh stock ( good flowing) 440's are good enough for 400hp max.
100cc's more is NOT that much......and definantly not worth $300 bucks....you might as well run some 650's or so and just run stock FP in them meaning an overall lower duty cycle. THATS insurance..
I dont see a benefit to the 550s for the price...just get 650-750s for the same price.
im pretty sure i could hit my goal hp wise with the 550's the lex afm and the ct26 with the emanage and the boost controller i already have. i just have to get ahold of some funding to get the afm and on a freakin dyno.siman said:good choice!
Keep track of the A/F ratio...I would like to see how bad/good it is with the stock 440's and fuel pump but with the lex and 14+lbs of boost on stock basically......could help diffuse some of the ponderings around here on frying your pistons and what not.