ok so i'm i just increased my injector size during this rebuild and i was curious if anyone knew where i could get an accurate wideband A/F guage, just so i can get a fuel map that i can break in the engine with. i just don't wanna flatten any springs or foul the plugs before i get it on a dyno.
BTW i'm runing 680primaries and 1000secondaries with an SAFCii. just untill i can get some money for a stand alone system.

 

your engine is otherwise mostly stock? I'm assuming also that you're turbo, if you're NA, put the stock injectors back in It'll be faster.

S-AFC can't deal with injectors during cranking so you may have some issues there.

680CC is like 20% more than 550CC, just lean out 0-3000RPM by 20%.
3340 (pri+sec combined) is about 50% more than 2200, so I'd lean out 4000RPM+ (with 3000-4000RPM being the staging/switchover and a mix between the two) by 40% and if it's still way too rich than by another 5%.

As far as "renting" a wideband goes you will probably need one for at minimum 3-4 hours, they rent around here for $75+/hour, and you can buy a topend wideband (AEM UEGO) for $350 or less, brand new.

 

His motor has mad porting and a hybrid turbo last I heard. I also heard of an intercooler in the works. Leave it to Andrew to concoct some scientific endeavour for performance.


I have some kind of wideband that we might be able to use. Sad part is, its in the daily driver AND its probably a permanent part of the header by now. Seems to be fairly accurate if EGT's arnt high.

 

I can probably score dyno time for you for $75 / hr

 

i planned on the dyno tune but after the break in is done. i just need a rough fuel base to get it done, maybe rip on it once or twice before hitting the dyno.

I know i was detonating and running lean on the last motor, hence the flatten springs and glowing turbo. from the my autometer (non-wideband) A/F guage i knew my primary injectors were reaching max duty at 3500rpm and after that i again all i see is the flat apex seal sprigns.
i just wanted to tune the safcii so i cound get it to stay at maximum 11:1 A/F. and yes i got big intake ports, big exhaust port, 3" exhaust, FCD, hybrid, premix. the hole bit.
currently i'm building the brackets, hood and front lip for a V-mount, but i'm gunna order the Intercooler and stand alone at the same time.
i'm not asking anyone to remove an installed wideband guage for me but curious if anyoen knew someone or somewhere that had one i could rent for an hour.
if not i'll prolly just tune it down 30% (680 are currently in the secondaries. 3360cc is 35% more then 2460cc)

 

You go thru motors like the average male goes thru underwear.

And they used to make fun of me for peets sake!

 

i get my fair share of harassment, but most people know that i treat my car like a track car and thus drive the **** out of it, i make the most of my motor and when it dies, i just rebuild it, no time to cry.