how much vaccum everyone have at idle?

[D347643]

I have a stage 1 cam advanced 2 degrees and im only pullin 10 inch of merc at 850. just wondering what everyone else is pullin, espeically stage 1 and e cam users.

thanks!

Drew

 

[aleborjas]

you should have more i dont have it i have XE274HR and i have like 15 inch of vac you should have the same are you shure you dont have a vacuum leak?

 

[Skoobie]

Im pulling 12-13hg with an E cam. Everything seems to run just fine

 

[D347643]

i think I prob do but my car idles so nice thats why iwas wondering. dot to dot my car was pulling 14 but now a little advanced and its 10. crazy

 

[Sicarius428]

14-15 with an E cam. The Stage 1 should be a little less than the E.
Kevin

 

[D347643]

thanks, anyone else?

 

[Black1987Stang]

Ecam owner here, i got 14-15 ligned dot to dot

 

[D347643]

hmmm, what idle rpm is that at?

 

[mustangdaren]

Mine is about 10-12 with a B-303 cam and Vortech S/C at idle (900rpm)

 

[Black1987Stang]

im guessing ur talking about me...it varies around 850-975 according to the stock gauge. Weird thing is it used to be around a consistent 13hg at idle then i took on the highway for the first time with the new motor and since after that it stays around 14-15. My stang has the weirdest situations, one i have right now is I have 65 degrees of timing with the spout connector in or out haha

 

[D347643]

haha holy ****, that doesnt sound right. hey mustang darren has it always been that low? Ive had more than one person tell me that 10 inch of merc is too low for a cam like a stage 1 or ford alphabet cam.

 

[mustangdaren]

It's probably due to the supercharger. It quickly goes to 0 when I get on the throttle and starts making boost under load.

 

[Look Its Aaron]

Stock cam with 20 inches of merc

 

[D347643]

haha ****er, damn my engine is fresh too its not like its worn guides or anything..come on, anyone have 10 lol

 

[luckythirteen13]

i have 14-15 with my vortech on at 950rpm

 

[95cobradude]

i have about 10-11 with a vortech and comps cam

 

[Grn92LX]

9-10" with my fairly large FTI custom. Around a 950 rpm idle. I may have a slight leak at the lower manifold though due to my heads being milled around .035" and my block being 0 deck.

 

[D347643]

nice thanks everyone, keep them coming. im just trying to get a general idea...

 

[vristang]

The 408 in my sig has 14" at cold start, and 16" once its nice and warm.

My general cam specs
Lift w/ 1.6RR .513/.526
Duration @ .050" 230/236
LSA 112

When do the factory vac accessories lose effectiveness?
What is the min vac needed for vac assist brakes?