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Re: 505cui stroker - dished or flat ? [Re: smoke] #1279203 08/05/12 07:15 PM 08/05/12 07:15 PM
Joined: Aug 2003 Posts: 43,214 Bend,OR USA C Cab_Burge I Win
Cab_Burge I Win C Joined: Aug 2003 Posts: 43,214 Bend,OR USA	Do not go to a full dish piston, it will have no quench Been there, done that, my 512 Ross pistons have a 22 CC full dish, they weigh 456 grams without the wrist pins and rings I have bulit a few BB Mopar stroker motors over the years,a lot more stock stroke pump gas motors, more than I can remember accuretaly now I have learned a few things along the way from past errors Do the math on what CC reverse dome it will take to make your intended compression ratio with all your other specs., IE deck hieght, combustion CC and so on and go from there Last edited by Cab_Burge; 08/06/12 12:45 AM. Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)

Re: 505cui stroker - dished or flat ? [Re: RobX4406] #1279204 08/05/12 07:35 PM 08/05/12 07:35 PM
Joined: Jul 2010 Posts: 33 germany S smoke OP member
smoke OP member S Joined: Jul 2010 Posts: 33 germany	Rob, i know what you mean, but it can be done and maybe our taste regarding rough idle differs That's what i call a slightly rough idle, and this ride even has a 12:1 cr. http://www.youtube.com/watch?v=lN9uEzqzdA0

Re: 505cui stroker - dished or flat ? [Re: Cab_Burge] #1279205 08/05/12 07:57 PM 08/05/12 07:57 PM
Joined: Jan 2003 Posts: 75,043 U.S.S.A. JohnRR I Win
JohnRR I Win Joined: Jan 2003 Posts: 75,043 U.S.S.A.	Quote: Do not go to a full dish piston, if it will have no quench Been there, done that, my 512 Ross pistons have a 22 CC ful ldish, they weigh 456 grams without the wrist pins and rings I have bulit a few BB Mopar stroker motors over the years,a lot more stock stroke pump gas motors, more than I can remember accureatly now I have learned a few things along the way from past errors Do the math on what CC reverse dome it will take to make your intended compression ratio with all your other specs., IE deck hieght, combustion CC and so on and go from there Cab the source piston should be a D dish

Re: 505cui stroker - dished or flat ? [Re: JohnRR] #1279206 08/05/12 08:17 PM 08/05/12 08:17 PM
Joined: Jan 2003 Posts: 16,928 NC 440Jim I Live Here
440Jim I Live Here Joined: Jan 2003 Posts: 16,928 NC	Double check the exact part number you are ordering, but this is a picture from the 440Source web site of their dish pistons. Good "D" shape with some quench area. You can even machine some off the top (0.00-0.030?) to reduce the dish to customize your compression ratio (decking the block to match). But I think the 11 CR you mentioned is enough.

Re: 505cui stroker - dished or flat ? [Re: RobX4406] #1279207 08/05/12 08:32 PM 08/05/12 08:32 PM
Joined: Mar 2008 Posts: 5,746 Ontario, Canada Dodgem master
Dodgem master Joined: Mar 2008 Posts: 5,746 Ontario, Canada	Don't forget this is a 505 cubic inch engine that has a habit of making everything act smaller including the heads! Cam will almost be like an RV stock 440 HP at best! Last edited by Dodgem; 08/05/12 08:32 PM.

Re: 505cui stroker - dished or flat ? [Re: Dodgem] #1279208 08/05/12 09:04 PM 08/05/12 09:04 PM
Joined: Jul 2010 Posts: 33 germany S smoke OP member
smoke OP member S Joined: Jul 2010 Posts: 33 germany	yepp, of course they gave me the wrong cam... I checked several stroker-kit seller but found only two that offer the lighter 7.100 rod version. 440source and musclemotors...... Will have to find out which one is the better choice. regards

Re: 505cui stroker - dished or flat ? [Re: smoke] #1279209 08/05/12 09:53 PM 08/05/12 09:53 PM
Joined: Jan 2003 Posts: 9,876 Weddington, N.C. Streetwize master
Streetwize master Joined: Jan 2003 Posts: 9,876 Weddington, N.C.	A well designed 'D' dish can actually Enhance power on a (relatively poor valve angle) wedge....provided you have full quench as well. One reason is it allows the initial combustion flame front to expand from the center of the cylinder. It also can allow the intake port/valve to get a little more room ( for the same static cr) on the opening ramp to work with with the slug coming up to and then passing TDC. My 517 is right at 12:1 with a JE 'D' dish. No worries there and I like the 7.1 rod....but get that broomstick of a cam out of there!! WIZE World's Quickest Diahatsu Rocky (??) 414" Stroker Small block Mopar Powered. 10.84 @ 123...and gettin' quicker! https://www.youtube.com/watch?v=-mWzLma3YGI In Car: https://www.youtube.com/watch?v=PjXcf95e6v0

Re: 505cui stroker - dished or flat ? [Re: smoke] #1279210 08/06/12 12:29 AM 08/06/12 12:29 AM
Joined: Apr 2005 Posts: 12,271 Overpriced Housing Central RobX4406 I Live Here
RobX4406 I Live Here Joined: Apr 2005 Posts: 12,271 Overpriced Housing Central	Quote: Rob, i know what you mean, but it can be done and maybe our taste regarding rough idle differs That's what i call a slightly rough idle, and this ride even has a 12:1 cr. http://www.youtube.com/watch?v=lN9uEzqzdA0 My idea of a mild idle is like most peoples idea of rough. That cam they gave you as a recommendation is a puppy dog in a 505. If that video is acceptable, I bet that Hyd Roller in that video is in at least the 250 at .050 range which is more along what I would run in a street car. Many people would think that's a rough idle or not street friendly so when you say "mild" you get what comp recommended. Ask Streetwize who posted in here, I believe it's his engine build.

Re: 505cui stroker - dished or flat ? [Re: RobX4406] #1279211 08/06/12 12:49 AM 08/06/12 12:49 AM
Joined: Jan 2003 Posts: 27,421 Balt. Md 3 383man Too Many Posts
383man Too Many Posts 3 Joined: Jan 2003 Posts: 27,421 Balt. Md	Dont know if you can get a good idea of my 493's idle in this vid. Its a solid flat tappet speced by Dwayne Porter and I love it. It has 264 & 270 @ .050 with a lift about .592. With my 1.6 rockers its about .630 lift and its a 110 LSA. I have it in the eng on a 106 centerline. Dwayne is very good as you could call him and talk to him. Let me know if you would want his phone #. I usually pick my own cams but I went with Dwayne because I wanted a cam speced for this eng and I know he could spec a better cam then me. Ron http://www.youtube.com/watch?v=bYIM2HLaOI4&feature=related Last edited by 383man; 08/06/12 12:50 AM.

Re: 505cui stroker - dished or flat ? [Re: Dodgem] #1279212 08/06/12 04:53 AM 08/06/12 04:53 AM
Joined: May 2003 Posts: 6,563 Downtown Roebuck Ont Twostick Still wishing...
Twostick Still wishing... Joined: May 2003 Posts: 6,563 Downtown Roebuck Ont	Quote: Don't forget this is a 505 cubic inch engine that has a habit of making everything act smaller including the heads! Cam will almost be like an RV stock 440 HP at best! It may act smaller but it won't sound any smaller. My 493 has an MP509 with the 108 LSA and it idles just like a 440 with the same cam, 1100 rpm and rough lol. 76 deg of overlap is 76 deg of overlap. The difference 500 cubes makes is that it will still pull from idle and it is swinging over 500 ft/lbs by 2000 rpm on. If idle quality is a concern I would go with at least a 112 LSA. 505 cubes with the compression ratio you are looking at is going to have eyeball flattening, 600 SEL crushing torque no matter what and that is what you want on the street more so than the max HP number that can theoretically be wrung out of your combo IMHO. As for the original question, I vote for the reverse dome and zero deck with .039 quench. Mine are Ross -34cc IIRC and the CR came in at 8.97 but mine is a 4.15 stroke. Bobweight was around 2200 if memory serves. Runs just dandy on 87 regular hurling 4800 lbs of C-body around. Kevin Last edited by Twostick; 08/06/12 05:05 AM.

Re: 505cui stroker - dished or flat ? [Re: smoke] #1279213 08/06/12 08:23 AM 08/06/12 08:23 AM
Joined: Feb 2005 Posts: 4,316 Prospect, PA BSB67 master
BSB67 master Joined: Feb 2005 Posts: 4,316 Prospect, PA	Quote: @Rob you are absolutely right: missmatch. I'll give them a call on monday to get a better suggestion. regards Honestly, I would recommend not calling Comp Cam. You will only get a different answer. What confidence will you have in the second answer? The fact that they recommended what they did the first time should be evidence enough to not go back. Call a Comp Cam distributor that has committed himself to the sport. I have used and recommend Dwayne Porter, but there are several good choices, just ask on this board. The additional advice/information that you will get from a guy like Dwayne is priceless.

Re: 505cui stroker - dished or flat ? [Re: smoke] #1279214 08/06/12 10:06 AM 08/06/12 10:06 AM
Joined: Nov 2006 Posts: 635 mississippi bentwheel43 mopar
bentwheel43 mopar Joined: Nov 2006 Posts: 635 mississippi	I have a 512" kit with 7.1 rod and flat top its like 12.46 compression.My cam is the 306* street roller it has 185# pumping compression.With eddy75cc heads and 93pumpgas and 34timing.It didn't run better at 36and 110 racegas in fact the pumpgas ran better. 7324156-003.JPG (41 downloads) Section 8 Racing We are nuts about racing.

Re: 505cui stroker - dished or flat ? [Re: 383man] #1279215 08/06/12 10:30 AM 08/06/12 10:30 AM
Joined: Jan 2003 Posts: 9,876 Weddington, N.C. Streetwize master
Streetwize master Joined: Jan 2003 Posts: 9,876 Weddington, N.C.	This is an agressive bullet Hydraulic roller 264/268@.050 on 108's in my 517....very similar specs to Ron's flat tappet. http://www.youtube.com/watch?v=jd8GeXYYkKU&feature=youtube_gdata_player I agree that The stroker can sound as nasty as the same cam in a 440, the difference is the off idle drivabilty and roll on power will be much better, kind of the best if both worlds. WIZE World's Quickest Diahatsu Rocky (??) 414" Stroker Small block Mopar Powered. 10.84 @ 123...and gettin' quicker! https://www.youtube.com/watch?v=-mWzLma3YGI In Car: https://www.youtube.com/watch?v=PjXcf95e6v0

Re: 505cui stroker - dished or flat ? [Re: Streetwize] #1279216 08/06/12 11:50 AM 08/06/12 11:50 AM
Joined: May 2003 Posts: 6,563 Downtown Roebuck Ont Twostick Still wishing...
Twostick Still wishing... Joined: May 2003 Posts: 6,563 Downtown Roebuck Ont	Quote: This is an agressive bullet Hydraulic roller 264/268@.050 on 108's in my 517....very similar specs to Ron's flat tappet. http://www.youtube.com/watch?v=jd8GeXYYkKU&feature=youtube_gdata_player I agree that The stroker can sound as nasty as the same cam in a 440, the difference is the off idle drivabilty and roll on power will be much better, kind of the best if both worlds. The only reason I installed a 2800 stall converter on mine was to cushion the drivetrain from the 1100 rpm idle. It drove away just fine with the stock converter and 2.76 gears. Ain't displacement grand? Kevin

Re: 505cui stroker - dished or flat? Meanwhile cam-talk [Re: Streetwize] #1279217 08/06/12 01:32 PM 08/06/12 01:32 PM
Joined: Jul 2010 Posts: 33 germany S smoke OP member
smoke OP member S Joined: Jul 2010 Posts: 33 germany	@Bobby,Ron + all thanks for all your input. Helps to narrow to find the goal! I listened to some additional files on youtube and soundwise it might go towards a 110LSA, here's an example i like: http://www.youtube.com/watch?v=yKaf3QiUI6k by the numbers: http://rides.moparmusclemagazine.com/ride/1192716/supergoatsack/1977/honda/civic/index.html it's a solid ... and i'm going for a hydraulic. Not sure if they are different in idle-sound. How much will the torque-curve change comparing a 108 to 110 LSA ? I also would be interested in knowing what differences to expect in torque and hp-curve compared a 112LSA with 4 advanced vs.a 108LSA

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