5...4 Quarts???..

LayanRubr · 01-05-2003, 05:32 PM

We recently purchased a rebuilt 302 bored .40 over to a 306. Heres the thing guys...the dip stick shows almost a quart over. But were using 5k quarts of oil last time we changed and with a new filter. Im wondering why its saying this so? Any help?

PKRWUD · 01-05-2003, 07:10 PM

First of all, .040" over is a 308. I just built one.

Second, did you run the engine first, before checking the oil level?

Fox Body · 01-05-2003, 07:38 PM

Good points PKRWUD.

LayanRubr, you need 5 quarts.

LayanRubr · 01-05-2003, 11:19 PM

Yes I did

as well Chris I dont mean to try to hack on your knowledge there cause you know a damn lot more than I ever will

but most .40 I've seen claim 306

PKRWUD · 01-06-2003, 01:40 AM

Quote:

Originally posted by LayanRubr
Yes I did as well Chris I dont mean to try to hack on your knowledge there cause you know a damn lot more than I ever will but most .40 I've seen claim 306

Then you need to ignore those people. If they can't do simple math, I wouldn't take any recommendations from them, either.

To figure an engine's displacement, the formula is:

pi / 4 x bore squared x stroke x # of cylinders

Now, pi (3.1415927) divided by 4 equals .7853982, so the first part of the formula will always be .7853982:

.7853982 x bore squared x stroke x # of cylinders

Now, a 302 has a 4" bore, a 3" stroke, and 8 cylinders, so, by substituting those numbers, you get:

.7853982 x 4 squared (16) x 3 x 8 or:

.7853982 x 16 x 3 x 8 = 301.5929 cubic inches

With me so far?

Okay, now let's say you bore the engine .030" over, which means increasing the bore diameter of each cylinder to 4.030". Then the formula would look like this:

.7853982 x 16.2409 x 3 x 8 = 306.13375 cubic inches.

If you were to bore it .040" over, the formula would become:

.7853982 x 16.3216 x 3 x 8 = 307.65492 cubic inches

Get it?

As far as your oil problem goes, if the engine has been ran, then clean the dipstick and check it again. When you see where the oil mark is, get a punch and a hammer, and punch a dimple at the top of the oil line. This is now your new, accurate dipstick.

Take care,
-Chris

tireburner163 · 01-06-2003, 03:11 AM

Oh God, he's breaking out the math formula's..........just take his word for it, hehe

LayanRubr · 01-06-2003, 04:02 PM

Holy shee

well I cant argue with a formula now giving me +2 cubic inches

thx Chris!

saltzstang · 01-06-2003, 04:48 PM

Quote:

When you see where the oil mark is, get a punch and a hammer, and punch a dimple at the top of the oil line. This is now your new, accurate dipstick

Good point pkrwud.

Somtimes people put a different length tube(Universal) which could be a little longer and make the level show low b/c the stick isnt going in far enough.....another way is to take the measurement difference off the stick and mark the difference on the top of the tube,,,,,, get a tubing cutter and cut off the difference off the top of the tube...this will allow the stick to go in further and read accurately on the stick.

01-06-2003, 06:04 PM

Quote:

Originally posted by PKRWUD
As far as your oil problem goes, if the engine has been ran, then clean the dipstick and check it again. When you see where the oil mark is, get a punch and a hammer, and punch a dimple at the top of the oil line. This is now your new, accurate dipstick.

Take care,
-Chris

PKRWUD-
So are you saying to fill the motor with 5 quarts...let the motor run to get oil into the filter, shut off & then re-check dip stick and put a punch where the oil is? You got me thinking here...because I was under the impression that most 302s took a little less than 5 quarts. So is it more like 4 & 3/4s of a quart...or 5 quarts even?

PKRWUD · 01-06-2003, 08:01 PM

It depends. Different filters hold more oil than others. Just go with 5 quarts, and forget about it.

01-05-2003, 05:32 PM	#1
LayanRubr Registered Member Join Date: Feb 2002 Location: Aggieland, Texas Posts: 297	5...4 Quarts???.. We recently purchased a rebuilt 302 bored .40 over to a 306. Heres the thing guys...the dip stick shows almost a quart over. But were using 5k quarts of oil last time we changed and with a new filter. Im wondering why its saying this so? Any help? __________________ 87 Mustang 5.0 (308) Notchback - The Blue Baron Rice Hater's Club member #20

01-05-2003, 07:10 PM	#2
PKRWUD Junior Member Join Date: Mar 1999 Location: Ventura, California Posts: 8,981	First of all, .040" over is a 308. I just built one. Second, did you run the engine first, before checking the oil level? __________________ Webmaster: Rice Haters Club Jim Porter Racing Peckerwoods Pit Stop Support Your Local RED & WHITE!

01-05-2003, 07:38 PM	#3
Fox Body Mustang Maniac Join Date: Sep 2000 Location: GA, U.S.A Posts: 2,266	Good points PKRWUD. LayanRubr, you need 5 quarts. __________________ 351W-powered 1979 Ford Mustang Ghia notchback '79 Video @ Idle Stock 5.8L under 4" cowl 'glass hood, C4 w/ Transgo shift kit, Holley 750 cfm, Edelbrock Performer RPM intake; Fluidyne Al radiator, Flexalite 175 electric fan, 1 5/8" MAC shorty headers, FRPP Al driveshaft; S&W 6-point cage; 2.5" Off road H-pipe, 2-chamber Flowmasters, 8.8" Rear w/ 3.55s; Weld wheels (15x6;15x8), Front: 225/60/15, Rear: 275/50/15 Nitto NT 555R Drag Radials; 14 x 4” K&N X-stream air filter. '92 GT (5-speed) Small In Car Video Stock 5.0L, 2-chamber Flowmasters, MAC CAI, Tri-Ax, Al pedals... "Red, thou art my companion. Hasten now your quickened metamorphosis to Green that I may conquer all who dare abide there beside me. May they be left thither behind burnt black." ---Fox Body

01-05-2003, 11:19 PM	#4
LayanRubr Registered Member Join Date: Feb 2002 Location: Aggieland, Texas Posts: 297	Yes I did as well Chris I dont mean to try to hack on your knowledge there cause you know a damn lot more than I ever will but most .40 I've seen claim 306 __________________ 87 Mustang 5.0 (308) Notchback - The Blue Baron Rice Hater's Club member #20

01-06-2003, 03:11 AM	#6
tireburner163 It's a lot like a race car Join Date: Aug 2000 Location: Meridian, MS Posts: 4,130	Oh God, he's breaking out the math formula's..........just take his word for it, hehe __________________ 1987 Buick T-type 1998 HD Electra Elide

01-06-2003, 04:02 PM	#7
LayanRubr Registered Member Join Date: Feb 2002 Location: Aggieland, Texas Posts: 297	Holy shee well I cant argue with a formula now giving me +2 cubic inches thx Chris! __________________ 87 Mustang 5.0 (308) Notchback - The Blue Baron Rice Hater's Club member #20

01-06-2003, 08:01 PM	#10
PKRWUD Junior Member Join Date: Mar 1999 Location: Ventura, California Posts: 8,981	It depends. Different filters hold more oil than others. Just go with 5 quarts, and forget about it. __________________ Webmaster: Rice Haters Club Jim Porter Racing Peckerwoods Pit Stop Support Your Local RED & WHITE!

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