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Author
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Topic: Royal Purple results....
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Dave_C
Gearhead Posts: 788
From: Gadsden, Al
Registered: Aug 99
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posted 05-25-2003 12:44 PM
   
Finally switched to Royal Purple synthetic racing oil in my 557 BBF rear engine dragster. I bought the Racing 51. It's supposed to be similar to a 20W50. That's thick, I know, but the engine has always had 20W50 Kendall due to the alcohol and the clearances were set up for thick oil.Anyways, there was no difference in ET, but a big gain in mph. The no diff in ET is prob due to having a "soft hit" converter. The 60 ft has always been slow compared to the ET and mph. 60 fts come in at 1.122-1.127, 4.95 in the 1/8. The 1/8 mile mph went from 140.30 to 143.56 on the Kendall to Royal Purple swap. All I can say is 143 and change in the 1/8 is hauling. Does someone have some kind of formula to figure HP gained? The dragster weighs 1830 lbs with me, ready to race. Gained 3.26 mph. Later,
David Cole
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Stephen & Horace Johnson
Gearhead Posts: 103
From: Gadsden, AL
Registered: Jul 2002
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posted 05-26-2003 01:17 AM
Way to go David.. I may try that oil in my stang.. but i dont know if i can handle the racing 9 in the Fairlane..its like putting water in the motor..lol..------------------
Stephen Johnson #2162
Horace Johnson #2167
NHRA-IHRA SS/D 427 Ford Fairlane (Ex-Van Cleve)
1985 Mustang FFW True Street 11.86 @115mph (N/A)
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Ryan Wilke
Gearhead Posts: 1700
From: Stanton, Michigan 49707
Registered: Oct 2000
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posted 05-26-2003 08:48 AM
quote:
Originally posted by Dave_C:
...The 1/8 mile mph went from 140.30 to 143.56 ... Does someone have some kind of formula to figure HP gained? The dragster weighs 1830 lbs....
Morning Dave,
Some folks say this is a fairly accurate calculator: http://users.erols.com/srweiss/calchpm8.htm With your data of:
@ 140.30 @ 1830# = 733.99HP
then
@143.56 @ 1830# = 786.36HP
-- produced a difference of 52.37HP!!
 - I'D SAY, NOT TOO SHABBY!
Looks like you've got that BBF of yours cookin' right along!!  GOOD JOB!! Ryan 
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clevelandstyle
Gearhead Posts: 800
From: Connersville, IN
Registered: Jul 2001
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posted 05-26-2003 09:33 AM
Do you think the converter had anything to do with it? Converters an do funny things.------------------
Ben
Grabber Green '70 Mach I 351C 4V
Robbin Egg Blue '79 Fairmont 351C 4V
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Moneymaker
Administrator Posts: 21725
From: Lyons, IL, USA
Registered: May 99
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posted 05-26-2003 12:42 PM
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Alex Denysenko
Co-Administrator and Moderator NHRA/IHRA/SRA member and licensed Superstock driver
MCA member# 53321
NHRA and IHRA SS/LA National Record Holder '00,'01,'02,&'03
First SS/MA in the TENS!
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28
Professional Manwhore
The Barry of BarrysGrrl Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"
www.moneymakerracing.com
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V8 Thumper
Gearhead Posts: 4044
From: Orange, Ca. United States of America
Registered: Dec 2001
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posted 05-26-2003 10:13 PM
I just filled my crankcase with Royal Purple this afternoon. Although not a race car, I got a 'seat of your pants' power increase by simply an oil change. Bonus: 10-15 degrees lower running temp! Good stuff ------------------
1965 GT coupe, 333ci aluminum headed/solid cammed stroker, four speed, 3.70:1 9" All Blue Oval, no blue bottle
http://mustangsandmore.50megs.com/V8Thumper.html
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65coupei6
Gearhead Posts: 430
From: S.F., CA
Registered: May 2000
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posted 05-26-2003 10:22 PM
What do you guys recommend on a steet car? 20/50 or 10/30?
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kid vishus
Gearhead Posts: 5248
From: middle of NC
Registered: Oct 2000
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posted 05-26-2003 10:34 PM
One of these days when I can afford it again, I'll have a crankcase full of 5W-20 RP in the racecar.
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