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Re: Budget 360?
[Re: patrick]
#689461
05/18/10 08:23 PM
05/18/10 08:23 PM
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Joined: Feb 2006
Posts: 1,057
The Great White North
RAMM
super stock
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super stock
Joined: Feb 2006
Posts: 1,057
The Great White North
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So I promised to post results Tuesday and here they are (if anyone cares). The rundown on the build is: 367 ci .040" over KB 107's
"0" deck, Stock rods ARP bolts
stock crank cut .010"/.010"ext balanced
Lunati VooDoo cam # 60404 hyd flat
234/242 @ .050" installed 105 c/l
"J" heads PP w 1.94/1.6 Chev valves
flow was 229 cfm @ .485" N/C to .525"
stock rockers and shafts/pushrods from
1970 Ford 302 application
Crosswind dualplane/ 750 Proform dbl
1 5/8" street style headers (you know)
So I put it through it's paces this evening on our Superflow 902 and here's how it went. Installed the new pushrods--torqued down the shafts and fired it up--sounded good and normal. Put some heat into it- set timing @ 36 total,dialed in a pull from 3500-5500 and let it go. 383 hp @ 5500 406 lb/ft @ 4100. Not half bad for what's in it and that is nothing (is what I think anyways) What's really nice is that the torque came in @ 400 + right from the bottom. Next pull I fatten up the carb a bunch and dial in a 5800 upper rpm limit---391 @ 5700 416 lb/ft @ 4100. This is all with an in house 650 Holley and a 4 hole tapered carb spacer. Next we remove the 650 Holley and spacer and put the customer's 750 Proform on with no spacer--Wow 383hp but 430 lb/ft! at the same peaks--the averages are quite good at this point. Next test we add a 2" open and hp surges to 394 but torque is down in the 416 range but is showing quite lean on the AFR. Jet it up 4 sizes all around and repeat-400.3 hp and 423 ft/lbs. Not bad but I would minus the spacer and take the 430 ft/lbs if it were mine.All in all the customer spent about $2700 total and now has an engine that should get her Duster into the 12 s. I will post some dyno sheets for those that are interested. What is really nice is that the torque peak occurs @ 4100 rpm and the hp occurs @ 5700--that s a 1600 rpm spread. I should add that we turned it to 6500 rpm just to see how much hp would drop off and it only fell 20 hp--remember this is a hydraulic flat tappet. Idle vaccuum @ 800 rpm was 10.5 and stable. I think the customer will like this engine. FWIW J.Rob
2009 PHR\EMC Competitor
2010 PHR\EMC Competitor
2011 PHR\EMC Competitor
2012 PHR\EMC Competitor
2013 PHR\EMC Competitor
2014 HotRod/EMC Competitor
2015 HotRod/EMC NoShow
2016 HotRod/EMC 3rd place SPEC Bigblock
2018 HotRod/EMC 7th place G3
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Re: Budget 360?
[Re: RAMM]
#689462
05/19/10 07:23 AM
05/19/10 07:23 AM
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Joined: Jan 2003
Posts: 16,123
Grand Haven, MI
patrick
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,123
Grand Haven, MI
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Quote:
So I promised to post results Tuesday and here they are (if anyone cares). The rundown on the build is: 367 ci .040" over KB 107's
"0" deck, Stock rods ARP bolts
stock crank cut .010"/.010"ext balanced
Lunati VooDoo cam # 60404 hyd flat
234/242 @ .050" installed 105 c/l
"J" heads PP w 1.94/1.6 Chev valves
flow was 229 cfm @ .485" N/C to .525"
stock rockers and shafts/pushrods from
1970 Ford 302 application
Crosswind dualplane/ 750 Proform dbl
1 5/8" street style headers (you know)
So I put it through it's paces this evening on our Superflow 902 and here's how it went. Installed the new pushrods--torqued down the shafts and fired it up--sounded good and normal. Put some heat into it- set timing @ 36 total,dialed in a pull from 3500-5500 and let it go. 383 hp @ 5500 406 lb/ft @ 4100. Not half bad for what's in it and that is nothing (is what I think anyways) What's really nice is that the torque came in @ 400 + right from the bottom. Next pull I fatten up the carb a bunch and dial in a 5800 upper rpm limit---391 @ 5700 416 lb/ft @ 4100. This is all with an in house 650 Holley and a 4 hole tapered carb spacer. Next we remove the 650 Holley and spacer and put the customer's 750 Proform on with no spacer--Wow 383hp but 430 lb/ft! at the same peaks--the averages are quite good at this point. Next test we add a 2" open and hp surges to 394 but torque is down in the 416 range but is showing quite lean on the AFR. Jet it up 4 sizes all around and repeat-400.3 hp and 423 ft/lbs. Not bad but I would minus the spacer and take the 430 ft/lbs if it were mine.All in all the customer spent about $2700 total and now has an engine that should get her Duster into the 12 s. I will post some dyno sheets for those that are interested. What is really nice is that the torque peak occurs @ 4100 rpm and the hp occurs @ 5700--that s a 1600 rpm spread. I should add that we turned it to 6500 rpm just to see how much hp would drop off and it only fell 20 hp--remember this is a hydraulic flat tappet. Idle vaccuum @ 800 rpm was 10.5 and stable. I think the customer will like this engine. FWIW J.Rob
if you had unlimited funds, the next neat step to try would be to get some OOTB or lightly prepped RHS X heads and toss on the short block (hughes sells them for under $1k/pr). you'd get smaller chambers to give you another 1/2-3/4 point of compression, as well as about 30 cfm more flow at the same lift point.....or even some EQ318B's--you'd get more lift using the magnum rockers, and while OOTB published specs look like at best you'd only have a 5-10 cfm flow advantage with them, the additional compression and better port velocity (flow about the same as your prepped J heads, but with a smaller cross section), while you may not pick up much in the way of peak HP, I'd expect you'd probably pick up another 10-20 lb-ft of TORK!
also, from a curiousity side, it would be interesting to swap the crosswind with an eddie RPM air gap to compare back to back...
Last edited by patrick; 05/19/10 07:24 AM.
1976 Spinnaker White Plymouth Duster, /6 A833OD
1986 Silver/Twilight Blue Chrysler 5th Ave HotRod **SOLD!***
2011 Toxic Orange Dodge Charger R/T
2017 Grand Cherokee Overland
2014 Jeep Cherokee Latitude (holy crap, my daughter is driving)
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Re: Budget 360?
[Re: RobX4406]
#689468
05/20/10 08:11 PM
05/20/10 08:11 PM
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Joined: Feb 2006
Posts: 1,057
The Great White North
RAMM
super stock
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super stock
Joined: Feb 2006
Posts: 1,057
The Great White North
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Just as a matter of fact--This engine was run with the 8 quart Milodon with NO windage tray. I think I will install a windage tray and see what happens--What do you guys think? Any opinions or feedback on using a tray in a small block? I will find out for myself either way but would welcome some input. I am also going to try some header extensions as well. Should be very interesting or anti-climatic. J.Rob
2009 PHR\EMC Competitor
2010 PHR\EMC Competitor
2011 PHR\EMC Competitor
2012 PHR\EMC Competitor
2013 PHR\EMC Competitor
2014 HotRod/EMC Competitor
2015 HotRod/EMC NoShow
2016 HotRod/EMC 3rd place SPEC Bigblock
2018 HotRod/EMC 7th place G3
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