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More Power---Hyd. Roller or Solid Flat Tappet? #1324437 10/22/12 04:00 PM 10/22/12 04:00 PM
Joined: Dec 2007 Posts: 284 Louisiana K kzinge1 OP enthusiast
kzinge1 OP enthusiast K Joined: Dec 2007 Posts: 284 Louisiana	Here's my combo: 426" Wedge, Stealth heads, Harland Sharp rockers, RPM intake, 750 Demon, 2" TTIs Street/ Strip 69 Roadrunner, 3.54 Dana, 727 w/ 3500 stall 9" converter. I have a Hyd. Roller setup that is .549/.544 lift 242/248 dur. @.050 and also a solid flat Tappet that is .525/.525 lift 248/248 dur. @.050 Which cam would you guys prefer with this setup? Also feel free to recommend something else as well.

Re: More Power---Hyd. Roller or Solid Flat Tappet? [Re: kzinge1] #1324438 10/22/12 05:18 PM 10/22/12 05:18 PM
Joined: Nov 2004 Posts: 1,708 S. Il. U.S.A. 5spdcuda top fuel
5spdcuda top fuel Joined: Nov 2004 Posts: 1,708 S. Il. U.S.A.	Do you know how well the heads flow? How much rpm are you willing to turn? RPM is always horsepower [ HP = torque x rpm divided by 5252 ]PROVIDED that you have the air flow and the valve train stability to support it. A lot of 9 in. converters are a little rpm happy so a solid lifter cam might be a good choice. Since yours is rated at only 3500 stall that may not be the case here. The only downside I see is that at .525 lift [ more like .500 net ] your solid is fairly low lift. Your hdy. roller seems to have good specs relative to everything else but will be rpm limited. What is the static compression ratio? The carb is probably a little small if you start turning a lot of rpm as well. Since you have aluminum heads and I assume you intend to drive on the street fairly often I would go with the hydraulic to keep valve lash simple.

Re: More Power---Hyd. Roller or Solid Flat Tappet? [Re: 5spdcuda] #1324439 10/22/12 05:30 PM 10/22/12 05:30 PM
Joined: Dec 2007 Posts: 284 Louisiana K kzinge1 OP enthusiast
kzinge1 OP enthusiast K Joined: Dec 2007 Posts: 284 Louisiana	I do not know exactly what the heads flow. They are untouched stealths so I think they flow a little less than the RPM heads. The solid cam is relatively low lift but has good duration. Also, I am not limited to that cam, I can buy another one. The only thing that worries me about the hydraulic is the RPM limit. I just tore up my 511 stroker motor after spinning it to about 6300 with the hyd roller. But its low maintenance, I have all the parts for it and don't have to worry about wiping a cam. Just have to set my rev limiter to 6K. Static Compression is 11-1

Re: More Power---Hyd. Roller or Solid Flat Tappet? [Re: kzinge1] #1324440 10/22/12 06:29 PM 10/22/12 06:29 PM
Joined: Jan 2003 Posts: 24,562 Brookeville, Md Mr.Yuck Not enough dumb comments...yet
Mr.Yuck Not enough dumb comments...yet Joined: Jan 2003 Posts: 24,562 Brookeville, Md	that roller should "pone" the solid... I'd wager at least by 1/2 second in the 1/4 mile. [IMG]http://i66.tinypic.com/pui5j.jpg[/IMG] Coming soon!!!!

Re: More Power---Hyd. Roller or Solid Flat Tappet? [Re: Mr.Yuck] #1324441 10/22/12 07:32 PM 10/22/12 07:32 PM
Joined: Jun 2005 Posts: 4,041 michigan woods imfixinmopars426 master
imfixinmopars426 master Joined: Jun 2005 Posts: 4,041 michigan woods	the 525 will suck...run the roller,or get a decent flat cam in the 550-570 area,cut for the motor,watch the duration to not get too high.

Re: More Power---Hyd. Roller or Solid Flat Tappet? [Re: imfixinmopars426] #1324442 10/22/12 08:25 PM 10/22/12 08:25 PM
Joined: Dec 2007 Posts: 284 Louisiana K kzinge1 OP enthusiast
kzinge1 OP enthusiast K Joined: Dec 2007 Posts: 284 Louisiana	Sounds like the roller is the way to go! Good because it will actually be cheaper for me. Just have to limit the RPM to 6k.

Re: More Power---Hyd. Roller or Solid Flat Tappet? [Re: kzinge1] #1324443 10/22/12 08:40 PM 10/22/12 08:40 PM
Joined: Dec 2006 Posts: 4,648 aotearoa rebel master
rebel master Joined: Dec 2006 Posts: 4,648 aotearoa	Quote: Sounds like the roller is the way to go! Good because it will actually be cheaper for me. Just have to limit the RPM to 6k. those Stealth heads will help with that.

Re: More Power---Hyd. Roller or Solid Flat Tappet? [Re: rebel] #1324444 10/22/12 08:54 PM 10/22/12 08:54 PM
Joined: May 2009 Posts: 513 Temperance, MI 6 68 HEMI GTS mopar
68 HEMI GTS mopar 6 Joined: May 2009 Posts: 513 Temperance, MI	i have a hyd roller in a 440 i just build. im a little less than impressed. its probably gonna be coming out for a solid flat tappet in the near future. 68 Dart GTS "HEMI" 10.30 @ 131 pump gas street car 3780# 69 Roadrunner 511 six pack 10.92 drive to track street car

Re: More Power---Hyd. Roller or Solid Flat Tappet? [Re: 68 HEMI GTS] #1324445 10/22/12 09:19 PM 10/22/12 09:19 PM
Joined: Jan 2003 Posts: 17,929 Akron, Ohio ProSport I Live Here
ProSport I Live Here Joined: Jan 2003 Posts: 17,929 Akron, Ohio	I vote for the solid flat tappet for sure, but add 1.6 rockers. 1970 Challenger, all aluminum 528 Hemi, HDK suspension, Tremec 5 speed manual

Re: More Power---Hyd. Roller or Solid Flat Tappet? [Re: kzinge1] #1324446 10/22/12 09:33 PM 10/22/12 09:33 PM
Joined: Aug 2005 Posts: 989 WI, USA 6 67dodge67 mopar addict
67dodge67 mopar addict 6 Joined: Aug 2005 Posts: 989 WI, USA	Quote: I do not know exactly what the heads flow. They are untouched stealths so I think they flow a little less than the RPM heads. The solid cam is relatively low lift but has good duration. Also, I am not limited to that cam, I can buy another one. The only thing that worries me about the hydraulic is the RPM limit. I just tore up my 511 stroker motor after spinning it to about 6300 with the hyd roller. But its low maintenance, I have all the parts for it and don't have to worry about wiping a cam. Just have to set my rev limiter to 6K. Static Compression is 11-1 When I was looking into a different cam set up, I was going back and forth with a solid vs a hyd roller as you are. I ended up calling Bullet Cams and they set me up with a hyd roller. I'm running eddy rpms (on a 470) vs your heads, they are basically untouched except for a valve job. The specs on my roller are @ 050, 249in 253out gross lift 573. I buzz it up to 6400 and it pulls hard all the way. Bullet is a good company to work with, and were extremely helpful. Dave

Re: More Power---Hyd. Roller or Solid Flat Tappet? [Re: 67dodge67] #1324447 10/22/12 10:19 PM 10/22/12 10:19 PM
Joined: Dec 2007 Posts: 284 Louisiana K kzinge1 OP enthusiast
kzinge1 OP enthusiast K Joined: Dec 2007 Posts: 284 Louisiana	I like the specs on the hyd. roller but I will be scared to rev it past 5500. Never thought I would tear a rofessionally built motor up at 6300 RPM. Guess I was wrong. Still undecided on the cam, want something that won't sling apart at 6k.

Re: More Power---Hyd. Roller or Solid Flat Tappet? [Re: kzinge1] #1324448 10/22/12 10:34 PM 10/22/12 10:34 PM
Joined: Feb 2005 Posts: 4,334 Prospect, PA BSB67 master
BSB67 master Joined: Feb 2005 Posts: 4,334 Prospect, PA	Quote: Here's my combo: 426" Wedge, Stealth heads, Harland Sharp rockers, RPM intake, 750 Demon, 2" TTIs Street/ Strip 69 Roadrunner, 3.54 Dana, 727 w/ 3500 stall 9" converter. I have a Hyd. Roller setup that is .549/.544 lift 242/248 dur. @.050 and also a solid flat Tappet that is .525/.525 lift 248/248 dur. @.050 Which cam would you guys prefer with this setup? Also feel free to recommend something else as well. Not seeing a huge difference between the two. Do you have the advertised and .200" numbers? The hydraulic is probably slow off the seat and will probably be a little softer at lower rpm than the solid. The Stealth, out of the box flow numbers at .50 and .55 are not much different, so the 0.050" lift advantage of the hydraulic won't mean that much. Any hydraulic should be able to live trouble free well above 6000 rpm, but I dont see your combinations wanting much more.

Re: More Power---Hyd. Roller or Solid Flat Tappet? [Re: BSB67] #1324449 10/22/12 11:21 PM 10/22/12 11:21 PM
Joined: Dec 2007 Posts: 284 Louisiana K kzinge1 OP enthusiast
kzinge1 OP enthusiast K Joined: Dec 2007 Posts: 284 Louisiana	I should have went with a mild stroker combo like yours BSB67. Those are very impressive numbers with a stock converter and manifolds. I wouldn't mind ditching my headers. I don't know the .020 numbers on either cam. I thought the hydraulic would live over 6k too but I was wrong.

Re: More Power---Hyd. Roller or Solid Flat Tappet? [Re: Mr.Yuck] #1324450 10/23/12 12:22 AM 10/23/12 12:22 AM
Joined: Oct 2003 Posts: 3,698 NE Oklahoma V Von master
Von master V Joined: Oct 2003 Posts: 3,698 NE Oklahoma	Quote: I'd wager at least by 1/2 second in the 1/4 mile. Im assuming your flat tappet is a Comp 294S?? Which is a lazy lobe, 154 @.200. Dont know what brand your hyd roller is, but comparing it to some lobes in the Comp book, Id figure its around 164ish @.200. Id guess .1-.15 et difference at best between the 2. Last edited by Von; 10/23/12 12:30 AM. 72 RR, Pump gas 440, 452s, 3800 lbs, Corked, ET Radials,. 11.33@117.72. Same car, bone stock 346s, 9.5 comp, baby solid. 12.24@110.

Re: More Power---Hyd. Roller or Solid Flat Tappet? [Re: Von] #1324451 10/23/12 01:15 AM 10/23/12 01:15 AM
Joined: Oct 2004 Posts: 16,489 Canada CrAzYMoPaRGuY I Live Here
CrAzYMoPaRGuY I Live Here Joined: Oct 2004 Posts: 16,489 Canada	Quote: Quote: I'd wager at least by 1/2 second in the 1/4 mile. Im assuming your flat tappet is a Comp 294S?? Which is a lazy lobe, 154 @.200. Dont know what brand your hyd roller is, but comparing it to some lobes in the Comp book, Id figure its around 164ish @.200. Id guess .1-.15 et difference at best between the 2. I would be surprised if there was more of a difference than a tenth, mayyyybe two... CrAzYMoPaRGuY

Re: More Power---Hyd. Roller or Solid Flat Tappet? [Re: kzinge1] #1324452 10/23/12 03:09 AM 10/23/12 03:09 AM
Joined: May 2009 Posts: 513 Temperance, MI 6 68 HEMI GTS mopar
68 HEMI GTS mopar 6 Joined: May 2009 Posts: 513 Temperance, MI	Quote: I like the specs on the hyd. roller but I will be scared to rev it past 5500. Never thought I would tear a rofessionally built motor up at 6300 RPM. Guess I was wrong. Still undecided on the cam, want something that won't sling apart at 6k. something was wrong with yours, i've been hauling mine up around 6,500 with no issues. i wouldn't hesitate to haul it up farther than that if it was really making power. it just seems a little flat to me. doesn't run horrible, just lacking something. had mine custom ground, pretty good specs. 246/246 .594/.594 with 1.6 rockers @ 110 (wanted a good street/strip type cam) i think the retro fit stuff for the big mopars is just a little to heavy to work as good as it does in the small blocks. 68 Dart GTS "HEMI" 10.30 @ 131 pump gas street car 3780# 69 Roadrunner 511 six pack 10.92 drive to track street car

Re: More Power---Hyd. Roller or Solid Flat Tappet? [Re: 68 HEMI GTS] #1324453 10/23/12 12:03 PM 10/23/12 12:03 PM
Joined: Dec 2007 Posts: 284 Louisiana K kzinge1 OP enthusiast
kzinge1 OP enthusiast K Joined: Dec 2007 Posts: 284 Louisiana	The retainers on the motor do have marks on them where the rockers were rubbing. Don't know if that could have caused my problem. Because I didn't really spin the motor up too high. I am leaning towards the roller just because I have all the parts already and I won't have to worry about wiping a lobe. When I get the stroker fixed it will get a solid flat Tappet or a solid roller

Re: More Power---Hyd. Roller or Solid Flat Tappet? [Re: kzinge1] #1324454 10/23/12 12:21 PM 10/23/12 12:21 PM
Joined: Jan 2003 Posts: 15,439 Val-haul-ass... eventually B BradH Taking time off to work on my car
BradH Taking time off to work on my car B Joined: Jan 2003 Posts: 15,439 Val-haul-ass... eventually	Quote: Also feel free to recommend something else as well. OK: - More gear -->3.91 - 4.10 - Bigger carb --> 850-ish - Smaller headers --> 1-7/8" - Port the heads, rather than run them "out of the box" And then - maybe - the hyd. roller cam might be an OK fit... and that depends on the LSA, your compression, etc.

Re: More Power---Hyd. Roller or Solid Flat Tappet? [Re: BradH] #1324455 10/23/12 12:46 PM 10/23/12 12:46 PM
Joined: Dec 2007 Posts: 284 Louisiana K kzinge1 OP enthusiast
kzinge1 OP enthusiast K Joined: Dec 2007 Posts: 284 Louisiana	Thanks for the suggestion. That would be an ideal combo. Right now I'm trying to put a "decent" combo together until I have the money to fix my stroker motor that I just tore up. Hopefully the car will run pretty good for the time being with one of the cams that I have to choose from.

Re: More Power---Hyd. Roller or Solid Flat Tappet? [Re: BradH] #1324456 10/23/12 12:58 PM 10/23/12 12:58 PM
Joined: Apr 2007 Posts: 2,826 NY usa 5 540challenger master
540challenger master 5 Joined: Apr 2007 Posts: 2,826 NY usa	Quote: Quote: Also feel free to recommend something else as well. OK: - More gear -->3.91 - 4.10 - Bigger carb --> 850-ish - Smaller headers --> 1-7/8" - Port the heads, rather than run them "out of the box" And then - maybe - the hyd. roller cam might be an OK fit... and that depends on the LSA, your compression, etc. Just want to touch one thing hear about the carb The 750 demon carbs are underrated the 750 flows closer to a 850 cfm carb.

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