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Anyone using 7/16 pushrods??? #925809 02/10/11 09:49 PM 02/10/11 09:49 PM
Joined: Jul 2005 Posts: 1,301 Penna 7 70satelliteguy OP pro stock
70satelliteguy OP pro stock 7 Joined: Jul 2005 Posts: 1,301 Penna	Did you have to clearance your block to accomodate these? I am using a MP Mega block. Thanks Mike

Re: Anyone using 7/16 pushrods??? [Re: 70satelliteguy] #925810 02/10/11 10:01 PM 02/10/11 10:01 PM
Joined: Jan 2003 Posts: 31,030 Oregon A AndyF I Win
AndyF I Win A Joined: Jan 2003 Posts: 31,030 Oregon	Shouldn't have to clearance the block but you'll most likely need to whittle on the heads a bit.

Re: Anyone using 7/16 pushrods??? [Re: AndyF] #925811 02/10/11 10:04 PM 02/10/11 10:04 PM
Joined: Jul 2005 Posts: 1,301 Penna 7 70satelliteguy OP pro stock
70satelliteguy OP pro stock 7 Joined: Jul 2005 Posts: 1,301 Penna	Thanks Andy, how about clearance problems with solid body Comp roller lifters ? Mike

Re: Anyone using 7/16 pushrods??? [Re: 70satelliteguy] #925812 02/10/11 11:00 PM 02/10/11 11:00 PM
Joined: Aug 2003 Posts: 43,173 Bend,OR USA C Cab_Burge I Win
Cab_Burge I Win C Joined: Aug 2003 Posts: 43,173 Bend,OR USA	Quote: Thanks Andy, how about clearance problems with solid body Comp roller lifters ? Mike I switched my 527 bracket motor to Manton 7/16 ball and cup from 3/8 ball and ball(switch heads and rockers) I had to trim the 440-1 heads with the 7/16 pushrods, didn't need to with the 3/8 pushrods on the SR heads Put them in and check for rubbing Both sets of rockers,T&D and Harland Sharps are 1.65 ratio so that does play a part in the pushrods rubbing Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)

Re: Anyone using 7/16 pushrods??? [Re: 70satelliteguy] #925813 02/10/11 11:19 PM 02/10/11 11:19 PM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	I didnt have to touch the block for 7/16 tapered PRs but had to remove a ton of material from my B-1M/Cs

Re: Anyone using 7/16 pushrods??? [Re: MR_P_BODY] #925814 02/11/11 02:33 PM 02/11/11 02:33 PM
Joined: Jul 2005 Posts: 1,301 Penna 7 70satelliteguy OP pro stock
70satelliteguy OP pro stock 7 Joined: Jul 2005 Posts: 1,301 Penna	Thanks for the replys. Mr. P body, what block are you using and are the tapered 7/16 pushrods ones just as strong ?. I have never seen any of those. Thanks Mike

Re: Anyone using 7/16 pushrods??? [Re: 70satelliteguy] #925815 02/11/11 07:19 PM 02/11/11 07:19 PM
Joined: Nov 2004 Posts: 6,890 North Alabama M Monte_Smith master
Monte_Smith master M Joined: Nov 2004 Posts: 6,890 North Alabama	Although you can make 7/16 pushrods work on INDY heads, it gets tight and takes lots of grinding. Unless you are just running insane spring pressure, usually a set of 3/8 pushrods with a .120 wall will do the trick. Monte

Re: Anyone using 7/16 pushrods??? [Re: 70satelliteguy] #925816 02/11/11 07:21 PM 02/11/11 07:21 PM
Joined: Nov 2004 Posts: 3,544 Syracuse,NY CompWedgeEngines master
CompWedgeEngines master Joined: Nov 2004 Posts: 3,544 Syracuse,NY	How much open and closed spring pressure do you plan on running ? What is the intended useage of this engine? RIP Monte Smith Your work is a reflection of yourself, autograph it with quality. WD for Diamond Pistons,Sidewinder cylinder heads, Wiseco, K1 rods and cranks,BAM lifters, Morel lifters, Molnar Technologies, Harland Sharp, Pro Gear, Cometic, King Engine Bearings and many others.

Re: Anyone using 7/16 pushrods??? [Re: 70satelliteguy] #925817 02/11/11 10:41 PM 02/11/11 10:41 PM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	Quote: Thanks for the replys. Mr. P body, what block are you using and are the tapered 7/16 pushrods ones just as strong ?. I have never seen any of those. Thanks Mike I sold all my B-1m/c stuff along with the mega block but I was going to use the 7/16 tapered instead of 3/8" straight because of high spring pressures(around 1000 or more open) but I clearanced the heads for them

Re: Anyone using 7/16 pushrods??? [Re: MR_P_BODY] #925818 02/11/11 11:35 PM 02/11/11 11:35 PM
Joined: Jan 2003 Posts: 465 Oconomowoc, WI. C Cudahlr mopar
Cudahlr mopar C Joined: Jan 2003 Posts: 465 Oconomowoc, WI.	The bigger the pushrod, the better! Steve Morris, told me that he runs 9/16" pushrods in most of his larger engines. He said that he gained 43 hp from switching from 1/2" to 9/16" on his engine. 1968 Barracuda 360/727 11.20 @ 121 mph 421 rwhp 1985 Harley Sportster Bobber 2006 Ram 2500 sport - The Cudahlr

Re: Anyone using 7/16 pushrods??? [Re: Cudahlr] #925819 02/11/11 11:48 PM 02/11/11 11:48 PM
Joined: Mar 2003 Posts: 2,501 PA moparacer master
moparacer master Joined: Mar 2003 Posts: 2,501 PA	I have 7/16 in mine with a low deck and Indy heads. I think the only place I ran into problems was the end of the heads #1 #2 #7 #8 exhaust. Had to clearance them a bit. 67 Barracuda street/bracket car 11.27-119 68 Dart 502 BB 8.70s-152 414 cid SB Dragster 7.65-174

Re: Anyone using 7/16 pushrods??? [Re: moparacer] #925820 02/11/11 11:56 PM 02/11/11 11:56 PM
Joined: Feb 2005 Posts: 5,207 Menomonee Falls DemonDust master
DemonDust master Joined: Feb 2005 Posts: 5,207 Menomonee Falls	Running 7/16 in my R5 no clearancing required. Totally different animal as well.... SDG Motorsports Hellcat Demon and Redeye Supercharger CNC Porting https://www.sdgmotorsports.com/

Re: Anyone using 7/16 pushrods??? [Re: 70satelliteguy] #925821 02/12/11 12:46 AM 02/12/11 12:46 AM
Joined: Aug 2003 Posts: 43,173 Bend,OR USA C Cab_Burge I Win
Cab_Burge I Win C Joined: Aug 2003 Posts: 43,173 Bend,OR USA	Quote: Thanks for the replys. Mr. P body, what block are you using and are the tapered 7/16 pushrods ones just as strong ?. I have never seen any of those. Thanks Mike Mike, I'm not Mr Pbody but here is a picture of a 7/16 single tapered pushrod on the right, straight 7 1/6 in the middle and a 3/8 on the left side(looking down at them ) I tried using 8 7/16 single tapered to avoid trimming the heads on the intake sides, it didn't work The 440-1 heads use a offset intake rocker and I didn't want to change the intake rollers to offsets so I tried the single tapered pushrods instead, that didn't work either I ended up using them on the exhaust sides and used the straight .095 wall x 7/16 diameter on the intakes BTW, the single tapered I ordered are .167 wall on the straight 7/16 part and end up being .120 at the 3/8 tapered ends IHTHs 6470921-MVC-010S.JPG (189 downloads) Last edited by Cab_Burge; 02/12/11 12:47 AM. Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)

Re: Anyone using 7/16 pushrods??? [Re: Cab_Burge] #925822 02/12/11 02:33 AM 02/12/11 02:33 AM
Joined: Oct 2006 Posts: 4,590 Indy J joshking440 Lunch is on me!
joshking440 Lunch is on me! J Joined: Oct 2006 Posts: 4,590 Indy	I run 3/8 intake 7/16 exhaust stock block and b1 heads. But like mr body said, had to remove tons of material from the heads

Re: Anyone using 7/16 pushrods??? [Re: joshking440] #925823 02/12/11 07:57 AM 02/12/11 07:57 AM
Joined: Jan 2003 Posts: 171 virginia 5 572stealth member
572stealth member 5 Joined: Jan 2003 Posts: 171 virginia	any real world gains by switching to thicker/larger pushrods? I have .080 wall 3/8 and was thinking of going to .135 wall 3/8. B1MC heads with 350 seat and 920 open.

Re: Anyone using 7/16 pushrods??? [Re: 572stealth] #925824 02/12/11 10:35 AM 02/12/11 10:35 AM
Joined: Jul 2005 Posts: 1,301 Penna 7 70satelliteguy OP pro stock
70satelliteguy OP pro stock 7 Joined: Jul 2005 Posts: 1,301 Penna	Thanks all for the reply's and for the pictures CAB ! I am changing roller cams on my 572 with the 572-13 heads. The spring pressures I am changing to are right with Mr. P body's are at 1000. I had been using 3/8 .080 pushrods with my other cam( 800 +) pressure but Chuck at Best Machine suggested going with the better springs and pushrods. He also suggested the tapered pushrods should help if I run into problems with the head clearance. Thanks Mike

Re: Anyone using 7/16 pushrods??? [Re: 70satelliteguy] #925825 02/13/11 12:21 PM 02/13/11 12:21 PM
Joined: Mar 2006 Posts: 9,835 MI, usa dvw master
dvw master Joined: Mar 2006 Posts: 9,835 MI, usa	I just mocked up my mega block which previously had 3/8" pushrods. There were slight witness marks at the very top of the inner lifter valley. My 7/16" tapered pushrods fit. Though they were very close. A little grinding was all that was needed. The heads needed a little also. I have -1s Doug

Re: Anyone using 7/16 pushrods??? [Re: 572stealth] #925826 02/13/11 01:42 PM 02/13/11 01:42 PM
Joined: Aug 2003 Posts: 43,173 Bend,OR USA C Cab_Burge I Win
Cab_Burge I Win C Joined: Aug 2003 Posts: 43,173 Bend,OR USA	Quote: any real world gains by switching to thicker/larger pushrods? I have .080 wall 3/8 and was thinking of going to .135 wall 3/8. B1MC heads with 350 seat and 920 open. I switch pushrods on the dyno my bracket motor when it had the SR heads and T&D rockers arms on it. I had a set of Smith Bros 3/8x.083 that they custom made for the motor(I wanted thicker but they insisted that .083 was more than enough for 275 lbs and 680 lbs openedOne of them broke in the middle during a dyno pull ) that I ended up replacing (after I fixed the motor) during another dyno session. I switch from the .083x3/8 Smiths to a set of .120 wallx3/8 diameter sereis 3 Mantons with no other changes, the motor made 8 HP more and the peak HP RPM went up 300 RPM I know there is more HP and valve train benifits in better pushrods than most people think BTW, you might want to try a set of 7/16 x.095 if they will fit Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)

Re: Anyone using 7/16 pushrods??? [Re: Cab_Burge] #925827 02/14/11 03:43 AM 02/14/11 03:43 AM
Joined: Aug 2009 Posts: 151 Canada BC Steve Barton member
Steve Barton member Joined: Aug 2009 Posts: 151 Canada BC	Just wondering if any one has used the Comp Hi Teck push rods. I'm building an R3, Indy heads 360-2 with a bullet cam 700 valve lift. heads and cam cam from ryanj ? Homepage Pic's http://www.bluemelon.com/dodgeman/ Steve. New best 1.40 60' 9.99 Et 132.8 mph

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