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Re: Who's flat solid cam? SB
[Re: justinp61]
#1840454
06/03/15 01:34 PM
06/03/15 01:34 PM
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Joined: Feb 2009
Posts: 1,532
off the grid
340B5
pro stock
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pro stock
Joined: Feb 2009
Posts: 1,532
off the grid
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The STH42 I put in my 340 knocked off nearly .4 on my 340 vs a comp XE295HL. The ST-21 is the STH-42's evil twin.
Yeah, it's got a smallblock.
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Re: Who's flat solid cam? SB
[Re: ademon]
#1840724
06/03/15 07:21 PM
06/03/15 07:21 PM
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Joined: Oct 2007
Posts: 3,978
Hilltown Pa
1967dartgt
master
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master
Joined: Oct 2007
Posts: 3,978
Hilltown Pa
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What ever cam you go with I would dump the rottela in favor of dedicated race
Oil like VR1 or Brad Penn just to name a couple. Rotella works in my motor, Brett Millers motors and Fishy340, who just made 813hp na with his small block on the dyno, just fine. I have better oil pressure with rotella 15\40 then Brad Penn 20\50.
Brett Miller W9 cnc'd heads
STR Chassis fabraction
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Re: Who's flat solid cam? SB
[Re: justinp61]
#1841081
06/04/15 12:44 AM
06/04/15 12:44 AM
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Joined: Jan 2003
Posts: 9,826
las vegas
70AARcuda
master
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master
Joined: Jan 2003
Posts: 9,826
las vegas
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71 Dart has a Hughes 260/264
71 Demon has a Hughes 256/265
71 Duster has MP 590 soon to changed to a Hughes 260/264
Tony
70 AARCuda Vitamin C
71 Dart Swinger 360 10.318 @ 128.22(10-04-14 Bakersfield)
71 Demon 360 10.666 @122.41 (01-29-17 @ Las Vegas)
71 Duster 408 (10.29 @ 127.86 3/16/19 Las Vegas)
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Re: Who's flat solid cam? SB
[Re: qwkmopardan]
#1841357
06/04/15 01:05 PM
06/04/15 01:05 PM
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Joined: Jan 2003
Posts: 15,439
Val-haul-ass... eventually
BradH
Taking time off to work on my car
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Taking time off to work on my car
Joined: Jan 2003
Posts: 15,439
Val-haul-ass... eventually
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Racer Brown. Call Jim at 1-410-866-7660. Hope his business didn't get burned down as he is in Baltimore MD. ST-21 for street/strip or STX-21 for a car w/some compression, converter, and gear. Jim will get you set up with a perfect cam for your combo. I like Jim at RB and ran pretty well w/ an ST-21 in my 440. But those are some OLD grinds, and cam lobes have evolved dramatically in the decades since those masters were hand-designed. The biggest difference, IMO, is valve train stability at high(er) RPM. When I dynoed three different cams (two UltraDyne .904" SFT and the ST-21), the UltraDynes would rev cleanly to about 6800, even though that was well past the HP peak. The Racer Brown, on the other hand, went into total valve train crash about 6400-6500. On the the track, if I was running my 28" tall tires insted of my 29", the shorter tires would put the engine right up into the valve float at peak RPM and the car would just freakin' stop accelerating. If I ran the 29" tires, the taller tires kept the RPM down enough to keep from having to rev that high and it would pull about 2 MPH more. This was using ported OEM heads w/ 3/8"-stem 2.14" x 1.81" valves and valve springs having about 140#s closed and 380# open pressure, so it wasn't a lack of spring load. The dynamics are simply crude in comparison by virtue of how long ago they were designed.
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Re: Who's flat solid cam? SB
[Re: BradH]
#1841400
06/04/15 01:44 PM
06/04/15 01:44 PM
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Joined: Feb 2005
Posts: 20,169
PA.
pittsburghracer
"Little"John
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"Little"John
Joined: Feb 2005
Posts: 20,169
PA.
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Racer Brown. Call Jim at 1-410-866-7660. Hope his business didn't get burned down as he is in Baltimore MD. ST-21 for street/strip or STX-21 for a car w/some compression, converter, and gear. Jim will get you set up with a perfect cam for your combo. I like Jim at RB and ran pretty well w/ an ST-21 in my 440. But those are some OLD grinds, and cam lobes have evolved dramatically in the decades since those masters were hand-designed. The biggest difference, IMO, is valve train stability at high(er) RPM. When I dynoed three different cams (two UltraDyne .904" SFT and the ST-21), the UltraDynes would rev cleanly to about 6800, even though that was well past the HP peak. The Racer Brown, on the other hand, went into total valve train crash about 6400-6500. On the the track, if I was running my 28" tall tires insted of my 29", the shorter tires would put the engine right up into the valve float at peak RPM and the car would just freakin' stop accelerating. If I ran the 29" tires, the taller tires kept the RPM down enough to keep from having to rev that high and it would pull about 2 MPH more. This was using ported OEM heads w/ 3/8"-stem 2.14" x 1.81" valves and valve springs having about 140#s closed and 380# open pressure, so it wasn't a lack of spring load. The dynamics are simply crude in comparison by virtue of how long ago they were designed. I think the question was about small block cams. Funny how we have SEVERAL small blocks on this site running 9's with bargain basement heads with Jim's (Racer Brown) cams.
1970 Duster
Edelbrock headed 408
5.984@112.52
422 Indy headed small block
5.982@112.56 mph
9.42@138.27
Livin and lovin life one day at a time
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Re: Who's flat solid cam? SB
[Re: pittsburghracer]
#1841451
06/04/15 02:45 PM
06/04/15 02:45 PM
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Joined: Jan 2003
Posts: 15,439
Val-haul-ass... eventually
BradH
Taking time off to work on my car
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Taking time off to work on my car
Joined: Jan 2003
Posts: 15,439
Val-haul-ass... eventually
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I think the question was about small block cams. Funny how we have SEVERAL small blocks on this site running 9's with bargain basement heads with Jim's (Racer Brown) cams. Understood, but the lobes aren't any different when they're ground on a SB core than a BB. And that's why I pointed out the valve style (heavy 3/8" BB valves) and spring load used to put some context around the results. The ST-21 was in my car when it ran its first 10.9 pass, so I'm not saying they don't work OK. But lobe designs have advanced since the more popular Racer Brown profiles came out in the '60s. I believe the info that I provided is an example of how that shows up in the real world.
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Re: Who's flat solid cam? SB
[Re: 440charger500]
#1842994
06/06/15 06:28 PM
06/06/15 06:28 PM
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Joined: Oct 2009
Posts: 1,267
North, Alabama
D-50
pro stock
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pro stock
Joined: Oct 2009
Posts: 1,267
North, Alabama
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Call Hughes Engines and they will help you decide which of their cams you need. I always had good luck with their solid cams.
1.33 60 ft,6.21 at 110.59 in the 1/8, pump gas small block,2950lbs,drag radials,mufflers and driven to track ...
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, the 340 has some other issues so I'll concentrate on the 434 build. I thought this would be a cheap way to get the Dart back on the road, but I was wrong. If I'm going to spend $1000 I'll spend it on the new engine.