Inlet valve closing at abdc....f4i

[287ridah]

Checking to see if anyone has the intake cam off an F4i and figured out the inlet closing angle abdc??

My other option is to buy an intake cam ($100) or ($350 whole head) and have our professor run the numbers on his cam machine.

Any help would be great
Alex
CSUS-FSAE

[287ridah]

Can anyone assist me in anyway??

[ReadySetGo]

duddddeee....haven't you heard of the search button...damnnn http://fsae.com/groupee_common/emoticons/icon_razz.gif

We need the cam specs for the stock f4i. overlap, duration, lift and anything else someone might have.

If all else fails, I think we might ask crane.

thanks

[BeaverGuy]

The Megacycle Cams catalog lists the stock specs for the F2/F3 and F4 as:

intake
0.325" lift
17.5 degfress BTDC to 37.5 degrees abdc at 0.040" lift

exhaust
0.291" lift
42 degrees bbdc to 11 degrees atdc at 0.040" lift

[287ridah]

Thanks beaverGuy.
http://fsae.com/groupee_common/emoticons/icon_smile.gif

[woollymoof]

the F4i engine manual has the following specs at 1mm (0.04") lift
Intake
Open: 22 degrees BTDC
Close: 43 degrees ABDC
Exhaust
Open: 38 degrees BBDC
Close: 7 ATDC

We've measured the lift as 8.2mm for intake and about 7.2mm for exhaust