MP112/15lbs of boost on 402CID 600/700 to the wheels......video link
Oct 13, 2007 | 11:50 PM
#31
EXACTLY. I'm always amazed by how some people so willingly disregard such relevant limitations. I see it a lot in the F-150 Lightning crowd with Eaton blowers. It's so cheap and easy to just swap some pullies and belt than it is to upgrade to a proper displacement supercharger for the job! Personally, I am less willing to pick little chunks of rotor out of my intercooler core, cylinder heads, and pistons.
On my setup, Whipple's redline for the 2.3L is 16k, for example. I run a 7.5" crank pulley, 2.625" compressor pulley, and shift at 5600RPM. Mathematically, it doesn't get any better than that. Roots (Eaton) can spin faster because the second rotor isn't overdriven like it is in screws, but even still, 21k+ is WAY past safe. It's a bomb. Kind of like sending power through a 4L60-E...
On my setup, Whipple's redline for the 2.3L is 16k, for example. I run a 7.5" crank pulley, 2.625" compressor pulley, and shift at 5600RPM. Mathematically, it doesn't get any better than that. Roots (Eaton) can spin faster because the second rotor isn't overdriven like it is in screws, but even still, 21k+ is WAY past safe. It's a bomb. Kind of like sending power through a 4L60-E...
Oct 14, 2007 | 12:33 AM
#33
I'm not exactly sure. Few years ago Jerry Magnuson was telling me about the durability testing these things go through and it's pretty intensive. Really impressive. I heard rumors of Lingenfelter spinning them in the 22-23k range.
Oct 14, 2007 | 05:23 AM
#34
TECH Enthusiast
Joined: Dec 2003
Posts: 572
Likes: 0
From: Western WA
I saw you said you had not seen a 2.6 pulley. You guys may already know but I found while looking for a few things I came across these
http://www.pulleyboys.com/radix.html
You can go up to a 2.5" Pulley.
<knip>
http://www.pulleyboys.com/radix.html
You can go up to a 2.5" Pulley.
<knip>
As to the 15 psi, boost can actually be back pressure due to a faulty system. Perhaps a misindexed cam as mentioned above, or maybe an exhaust restriction such as melted/plugged cats.
Oct 14, 2007 | 08:00 AM
#35
If you look at the pulleyboys site listed above, you'll see that the pulleys for a car radix (rear-driven via extra shaft) are different than ours, and tend to run smaller. Apparently there is a speed reduction on the rear belt. Maybe BlownChevy can provide us with more info, but it looks as though he might not be spinning the blower as fast as we think.
As to the 15 psi, boost can actually be back pressure due to a faulty system. Perhaps a misindexed cam as mentioned above, or maybe an exhaust restriction such as melted/plugged cats.
As to the 15 psi, boost can actually be back pressure due to a faulty system. Perhaps a misindexed cam as mentioned above, or maybe an exhaust restriction such as melted/plugged cats.
Oct 14, 2007 | 11:35 AM
#37
If you look at the pulleyboys site listed above, you'll see that the pulleys for a car radix (rear-driven via extra shaft) are different than ours, and tend to run smaller. Apparently there is a speed reduction on the rear belt. Maybe BlownChevy can provide us with more info, but it looks as though he might not be spinning the blower as fast as we think.
As to the 15 psi, boost can actually be back pressure due to a faulty system. Perhaps a misindexed cam as mentioned above, or maybe an exhaust restriction such as melted/plugged cats.
As to the 15 psi, boost can actually be back pressure due to a faulty system. Perhaps a misindexed cam as mentioned above, or maybe an exhaust restriction such as melted/plugged cats.
Oct 15, 2007 | 05:02 AM
#38
GFYS and STFU
iTrader: (8)
Joined: Jan 2007
Posts: 13,870
Likes: 4
From: Here and sometimes there too.
So I see he never posted a vid or a dyno graph of that run or anything else for that matter? Did he make any new threads in regards to his set-up and if not can we assume this was BS or just improperly sized cam/restrictions/etc...? Just wondering where we stand on the credibility of this on a properly flowing engine?
Oct 15, 2007 | 06:27 PM
#39
Launching!
Joined: Apr 2006
Posts: 254
Likes: 0
but you are out of the efficiency range basicly you are making more noise and more heat without doing anything kinda like my wife..
Last edited by NoRice; Oct 15, 2007 at 08:37 PM.
Oct 15, 2007 | 06:30 PM
#40
