98camaroLS1M6

iTrader: (35)

about 12.9 cam only.

Patman

Mine was mostly around 13.1 at WOT on the dyno when I got it tuned, however I've got a Vararam so it's possible that at speed the actual a/f ratio is a tad leaner.

BriancWS6

iTrader: (18)

Had ZERO knock retard My A/F was obtained via the sniffer in the tail pipe. Anyone else care to chime in like Guitsboy did about not melting ****? Just trying to decide whether or not to have the tune fattened up when I go back.

GuitsBoy

iTrader: (4)

Does this mean you DID melt **** without KR? No power adder?

BriancWS6

iTrader: (18)

Naw, the car is 100% fine. I am just trying to get opinions on what to do...either leave the tune as is at the 13.4ish-1 a/f or fatten it up to around 13.0.

GuitsBoy

iTrader: (4)

Well if the sniffer was inserted at the tailpipe, its quite easy for outside air to revert into the mix and skew your A:F readings. If the reading however were correct, you are running on the bleeding edge of safety, and whats more, you may even be lean enough to actually LOSE power. My suggestion would be to invest in a wideband if at all possible and go from there, that way you can atleast get a second source to verify your A:F is actualy at 13.4.

BriancWS6

iTrader: (18)

Thanks for the info there man. I know that the car made even more power a bit leaner than that, but we brought it back down to it's current level and didn't lose much at all. So it's not lean to the point of losing power yet. I like the Wideband idea.....I'll always be able to stay on top of things that way. Care to drop a link to the preferred place to get one? Thanks for you and everyones input here.

VTC_WS6

iTrader: (9)

12.9-13.1, made the most power when I pulled timing actually.

BriancWS6

iTrader: (18)

Are you saying that you GAINED power with less timing? Believe it or not but I only had 19-20* timing with the stock tune we bumped it up to 28*.

oange ss

iTrader: (50)

01-02 f-body timing tables max out at 22*

MattIROC

iTrader: (19)

first run I had was 13.5 a/f and it made 375hp/364tq... got it down to 12.8 and it made 369hp/357tq, but the temp went up 8 degrees.

link to dynosheet - http://mattiroc.com/tapicsbig/100_1815%20(Large).jpg

BriancWS6

iTrader: (18)

Well my tuner specifically said 28*, and I have heard of people asking if someone was running race fuel and 30*+ of timing when freak numbers are posted.

Anyone care to comment on the 22* limit?

GuitsBoy

iTrader: (4)

22 is what the later year cars come set to from the factory. Most applications will see increases in HP from bumping the timing up to 28 or so. Few will gain anything past that, and an unlucky handful of cars will actually start to lose power past that. Even running race fuel, more timing may not necessarily give you any more power.

BriancWS6

iTrader: (18)

Thanks for clearing that up, you've been a great help throughout this thread

GuitsBoy

iTrader: (4)

I ordered my LC-1 from here: http://www.dynotunenitrous.com/store...?idproduct=169 It interfaces nicely with HPTuners, although it comes with its own stand alone program. To use the stand alone program you need a laptop with a serial port, or a USB to serial converter. If you dont have HPtuners or even a laptop, then youll need a wideband gauge that will likey add another $50+ to the mix.

My pleasure

MattIROC

iTrader: (19)

I think mine also was running 28 degrees of timing on ls1edit...

PREDATOR-Z

Timing requirements are actually simple. There is no rule of thumb. You dyno, advance timing to max power without pinging and back it up 1*.
Some setups require more, some less. It has to do with your whole combo, but mainly cam VE's and SCR/DCR according to fuel used.

Schantin

iTrader: (6)

N/A I was running 13.4 to 1 at WOT. No knock retard and no issues. That was with a TR224 cam. Stil have the cam, but now I'm running forced induction and dropped my A/F to 10.6 to 1. All ratios measured with an AEM wideband welded into the header pipe.

eamador11

H/C 12.9 tuned by East Coast Supercharging

eamador11

Bring it to 12.8-12.9 WOT AFR and youll feel a difference! Rightnow your on the lean side