suprat04r

what do you guys tune your LS1's and such to? idle, cruise and wot? i know on the supra motors we did 14.7 cruise and idle and WOT full boost, 11.5's

i wasn't sure if NA motors or higher compression motors were any different.

thanks for any insight!

jason

sschkade

iTrader: (7)

Somewhere between 12.5 and 13.1 for NA... no richer and no leaner IMO.

Edit: What I posted was for WOT, and I forgot to mention 14.68 (14.7) for cruise.

ZMONSTER!

iTrader: (9)

13.1 for me

PREDATOR-Z

15.5 at cruise (colder plugs and 94 octane)

Bird

iTrader: (25)

14.7 for idle and normal part throttle, 12.8 for WOT (PE mode) - I've altered the tune to roll into PE mode quicker though for best overall response.

Bird

Gh0st

iTrader: (3)

This.

Tune your car for safety and performance in mind. If it's a race car...no holds barred

suprat04r

awesome

have you guys tuned your idle and cruise to mid- high 15's? would it still run right? do you save any gas MPG doing so?

thanks for the WOT a/f (i'll shoot for ~12.8) when i get my LS1

Soul TKR

iTrader: (4)

14.7 is the ideal A/F for ANY car... however.... I myself run on the rich side a little because I wanted a little "safer" tune... as do most people on here... for the most part I think you'll find anywhere between 13.0-13.5 to be acceptable...

radkon

iTrader: (2)

Normal driving 14.681 (stoich for gasoline NA engines)
WOT (PE) 12.8~13.2 depending on RPM
Low load, low RPM cruise 16.5 (04 GTO running lean cruise)

suprat04r

radkon- what is your gas MPG with your car tuned at 16.5 vs. 14.7?

just curious how much difference it makes...


off topic but i have a toyota landcruiser (12-14 mpg) and i wanted to lean it out to see if i can get any better gas mileage out of this tank. lol

i need to get a wideband first and see what the a/f ratio is looking like right now.

radkon

iTrader: (2)

Its at 14.68 for most of the range, its only at 16.5 at 40+ mph and very low load (flat land cruising) so I can only compare instant mpg readings. Without lean cruise I saw about 28 MPG Instant readings, with lean cruise I see about 37 MPG readings. On my last distance cruise (200+ miles) I got 26.8 MPG avg with the air on, this was on fairly flat terrain. Overall I think its about a 15% improvement on hwy cruising.

I've seen my 15 mile one way commute (60% hwy 40% city) avg go from 18.2 mpg to 19.6 mpg.