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Re: 5/16 pushrods with solid roller
[Re: skrews]
#1616146
05/05/14 01:26 AM
05/05/14 01:26 AM
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Joined: Apr 2009
Posts: 3,414
Toronto
mshred
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Toronto
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Quote:
I had Smith Brothers make a set of 5/16 intake and 3/8 exhaust pushrods for my solid roller Indybrock headed motor. Had .712 lift with 245# seat 650# open. Would turn that motor 7300. No issues. Told them to give me the best they could on the intakes.
Any idea on the wall thickness of the 5/16 ones?
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Re: 5/16 pushrods with solid roller
[Re: skrews]
#1616148
05/05/14 09:30 AM
05/05/14 09:30 AM
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Joined: Dec 2009
Posts: 20,622
in a cattle trailer down by th...
Guitar Jones
Paddle faster! I hear banjo music!
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Paddle faster! I hear banjo music!
Joined: Dec 2009
Posts: 20,622
in a cattle trailer down by th...
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I'm using Trend 5/16 pushrods in my engine .118 wall thickness IIRC.
"Follow me the wise man said, but he walked behind"
'92 D250 Club Cab CTD, 47RH conversion, pump tweaks, injectors, rear disc and hydroboost conversion.
'74 W200 Crew Cab 360, NV4500, D44, D60 and NP205 divorced transfer case. Rear disc and hydroboost coming soon!
2019 1500 Long Horn Crew Cab 4WD, 5.7 Hemi.
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Re: 5/16 pushrods with solid roller
[Re: Guitar Jones]
#1616149
05/05/14 01:18 PM
05/05/14 01:18 PM
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Joined: Jan 2003
Posts: 6,266
Renton Washington
Triple Threat
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master
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Posts: 6,266
Renton Washington
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Smith Brothers 5/16 .120 wall here. 275 on the seat, 600 open. Still going after 225 runs.
-Dustin
67 Dart, 9 second, 392" G3 Hemi
68 Barracuda 340 F/SA
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Re: 5/16 pushrods with solid roller
[Re: Streetwize]
#1616152
05/05/14 03:05 PM
05/05/14 03:05 PM
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Joined: Nov 2004
Posts: 4,330
Lynchburg, VA
Leon441
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master
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Lynchburg, VA
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Was just told about these thicker 5/16 push rods. You can buy a variety of stepped and tappered pushrods. If you know you lengths enter that number on eBay and you would be surprised what's out there cheap. I just got some 9/16 8.300 pushrods with long tapper and short tapper for about what you would pay for lash caps lol.
Career best 8.02 @ 169 at 3050# and 10" tires small block power.
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Re: 5/16 pushrods with solid roller
[Re: Streetwize]
#1616153
05/05/14 03:13 PM
05/05/14 03:13 PM
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Joined: Apr 2009
Posts: 3,414
Toronto
mshred
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Toronto
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Quote:
Manton makes a nice 11/32" pushrod.
I am not sure even the 11/32 stuff would fit. The 5/16 is already very close to touching the lifter bore
I have heard that too thick of a wall thickness on a small diameter pushrod can actually weaken the design...any truth to this?
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Re: 5/16 pushrods with solid roller
[Re: Leon441]
#1616154
05/05/14 05:39 PM
05/05/14 05:39 PM
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Joined: Apr 2009
Posts: 3,414
Toronto
mshred
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OP
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Toronto
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Quote:
Was just told about these thicker 5/16 push rods. You can buy a variety of stepped and tappered pushrods. If you know you lengths enter that number on eBay and you would be surprised what's out there cheap. I just got some 9/16 8.300 pushrods with long tapper and short tapper for about what you would pay for lash caps lol.
I will check that out!
Wondering if anyone runs less then .120" wall 5/16 stuff and if it works ok
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Re: 5/16 pushrods with solid roller
[Re: Triple Threat]
#1616155
05/05/14 08:03 PM
05/05/14 08:03 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
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Master
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Romeo MI
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Quote:
Smith Brothers 5/16 .120 wall here. 275 on the seat, 600 open. Still going after 225 runs.
Same set up here on my Rampage
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Re: 5/16 pushrods with solid roller
[Re: mshred]
#1616157
05/05/14 08:43 PM
05/05/14 08:43 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
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Master
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Posts: 52,972
Romeo MI
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Quote:
The nitrous is what slightly worries me about using such a small pushrod...for some reason I am having serious issues pulling the trigger on this- the 5/16 just makes me feel uncomfortable for some reason, but I have no choice at this point
Spring pressure is spring pressure.. if its strong
enough to hold the rev then the PR will
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Re: 5/16 pushrods with solid roller
[Re: MR_P_BODY]
#1616158
05/05/14 08:53 PM
05/05/14 08:53 PM
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Joined: Apr 2009
Posts: 3,414
Toronto
mshred
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OP
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Quote:
Quote:
The nitrous is what slightly worries me about using such a small pushrod...for some reason I am having serious issues pulling the trigger on this- the 5/16 just makes me feel uncomfortable for some reason, but I have no choice at this point
Spring pressure is spring pressure.. if its strong
enough to hold the rev then the PR will
True
I also wonder if my pushrod issue is because I have a factory roller block with a slightly larger lifter boss, or if everyone has the same issue with the Indy stuff?
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Re: 5/16 pushrods with solid roller
[Re: mshred]
#1616159
05/05/14 09:12 PM
05/05/14 09:12 PM
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Joined: Oct 2009
Posts: 1,267
North, Alabama
D-50
pro stock
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pro stock
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North, Alabama
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I am using 11/32 x .120 wall and I am running the 360-2 Indy heads. Mine are 7.605 and 7.640 length Manton pushrods.
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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Re: 5/16 pushrods with solid roller
[Re: D-50]
#1616160
05/05/14 09:20 PM
05/05/14 09:20 PM
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Joined: Apr 2009
Posts: 3,414
Toronto
mshred
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Toronto
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Quote:
I am using 11/32 x .120 wall and I am running the 360-2 Indy heads. Mine are 7.605 and 7.640 length Manton pushrods.
How close are the intake pushrods to the lifter bosses on your setup? Did you open up the pushrod holes in the heads at all to get that size to fit?
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Re: 5/16 pushrods with solid roller
[Re: mshred]
#1616161
05/05/14 09:27 PM
05/05/14 09:27 PM
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Joined: Oct 2009
Posts: 1,267
North, Alabama
D-50
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pro stock
Joined: Oct 2009
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North, Alabama
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I bought the heads used and ported by Brett Miller they were probably clearenced already. I do not remember how close they are to the lifter bosses. I am running a 1973 340 block.
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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Re: 5/16 pushrods with solid roller
[Re: D-50]
#1616162
05/05/14 09:28 PM
05/05/14 09:28 PM
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Joined: Apr 2009
Posts: 3,414
Toronto
mshred
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Toronto
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Quote:
I bought the heads used and ported by Brett Miller they were probably clearenced already. I do not remember how close they are to the lifter bosses. I am running a 1973 340 block.
Cool. Are you also running different length intake and exhaust pushrods? or did you get the same length for each?
I hope that 5/16 will be sufficient...I just feel really uneasy about this lol
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Re: 5/16 pushrods with solid roller
[Re: mshred]
#1616163
05/05/14 09:39 PM
05/05/14 09:39 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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My intake and exhaust push rods are different lengths.
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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