View Poll Results: What RPM do you turn WOT
5000-5300
18
20.22%
5400-5700
22
24.72%
5800-6000
28
31.46%
6000-6500
21
23.60%
Voters: 89. You may not vote on this poll
WOT RPM, custom engines
03-20-2012 | 11:22 AM
#21
RIPSTA Racing Team
Joined: Nov 2008
Posts: 2,093
Likes: 1
From: Philadelphia, PA
Limiters have 6000 chips in them and I'm up on them alot spinning 36's. This year we'll be lowering the gears in the lowers to 1:36 instead if the 1:50 and reprop again! Still looking for more!
03-20-2012 | 11:23 AM
#22
VIP Member
Joined: Dec 2001
Posts: 10,397
Likes: 402
From: Cape Coral, Florida
Me too..... Every time I go out at least once. 
Dart blocks, Callies cranks, Oliver rods, JE pistons with Isky ToolRoom springs, morel hyd roller lifters and AFR heads. Crane gold rockers and stud girdles on top.
95% of my time running is between 3500 to 4000RPMs.
5 seasons so far without having a valve cover off (knocking on my wooden desk as I type!!)
Dart blocks, Callies cranks, Oliver rods, JE pistons with Isky ToolRoom springs, morel hyd roller lifters and AFR heads. Crane gold rockers and stud girdles on top.95% of my time running is between 3500 to 4000RPMs.
5 seasons so far without having a valve cover off (knocking on my wooden desk as I type!!)
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Happily retired and living in Heavens waiting room.
Happily retired and living in Heavens waiting room.
Last edited by OldSchool; 03-20-2012 at 11:26 AM.
03-20-2012 | 12:25 PM
#25
Registered
Joined: Aug 2001
Posts: 4,008
Likes: 3
From: Aurora Ontario
I spin my blown efi 509 to 6000 regularly and for one particular poker run every year, I step down in prop for better acceleration as there is a very long, winding river on the run and spin it to 6200 to 6300 on the straights. Sure sounds nice up there.
03-20-2012 | 04:26 PM
#26
Platinum Member
Joined: Dec 2002
Posts: 2,195
Likes: 2
From: Dallas, TX
The answer...it depends on the length of the stroke. The shorter the stroke, the more tolerant the BBC engine will be to increased RPM. Most of the Super Cat engines were 3.75 or 3.80 stroke and they raced at 7500 RPM...I think 
03-20-2012 | 05:58 PM
#28
Registered
Joined: Aug 2005
Posts: 6,306
Likes: 1
From: Between A Womans Leggs in IL
fixx
So help me out here......and this may be more prop question than engine. My current engine has rev limiter set @ 5600 rpms....was stil make power all the way up till then but torque started to drop at 5300ish. My current prop i can only spin to 4900.....maybe 5000 if its over trimmed. This prop is in stock form. It doesnt make sense to me to be able to drop prop pitch and still be faster with a lower pitch prop but at only 4900 i am leaving 80+ hp on the table. Would i benefit from dropping pitch and running higher rpm?
03-20-2012 | 10:03 PM
#30
Registered
Joined: Dec 2002
Posts: 239
Likes: 0
From: MO
7,200 to 7,400.... 598s, 3.3 Whipples, Solid Roller! Had BPM 1.36 drives and 40 Pitch props. No more options at the time. Take out the chips and let her eat!!!
http://www.youtube.com/watch?v=dZz74XZnFUA
http://www.youtube.com/watch?v=dZz74XZnFUA
