what should your KPA values be if your car is not boosted?

92notch · Post by **92notch** » Sat May 06, 2006 9:28 am

my car is a NA 92 mustang with a 306
24lb injectors
Trick Flow Heads ,Intake and stage one cam
255lb fuel pump

I plan on Turbo charging the car in the future but right now im running NA so what shoul the values in the VE table be under KPA?

thanks in advance

Bernard Fife · Post by **Bernard Fife** » Sat May 06, 2006 11:07 am

what should your KPA values be if your car is not boosted?

92notch,

This depends to some degree on your elevation, your engine idle vacuum (which in turn depends on the tuning), and things like the decel vacuum (which depends on the type of trans you have, your driving style, etc., etc.).

For a guideline, I'd start with 100 kPa in the 'top' bin (for naturally aspirated), and around 10-15 kPa less then your idle vacuum in the lowest bin. You'll probably idle around 16-18 inHg of vacuum, which is ~40 kPa, so I'd use 30 kPa to start for the lowest bin (and 25 if you are concerned about maxmizing gas efficiency to the nth degree).

However, once you have been driving and tuning for a week or two you'll have lots of datalogs to show exactly what actual; range you are using. At that point you can edit your bins to match.

Lance.

92notch · Post by **92notch** » Sat May 06, 2006 3:36 pm

thanks i will give that a shot