Stock pushrods would to fine in a race motor, i know there are people around that run em
Justin
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| Pushrods https://www.slantsix.org/forum/viewtopic.php?t=5775 |
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| Author: | cycledog [ Fri May 16, 2003 8:32 pm ] |
| Post subject: | Pushrods |
Given the length of /6 pushrods @9.9" do the stock units flex too much in a modified engine? Are after market chromemoly a better choice? What do you racers use? Thanks, C-dog |
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| Author: | 87Slant_sickness [ Fri May 16, 2003 9:45 pm ] |
| Post subject: | |
Stock pushrods would to fine in a race motor, i know there are people around that run em Justin |
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| Author: | Rick Covalt [ Sat May 17, 2003 7:28 am ] |
| Post subject: | Pushrods |
Our new engine bent 3 pushrods almost right away with stock pushrods. The cam we are using was .528 / 284 with single springs with 300# open pressure. I think it all depends on what cam and spring you will be using. Smith brothers is where we got ours. Rick |
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| Author: | bud L. [ Sat May 17, 2003 8:43 am ] |
| Post subject: | more |
make sure you have clearance between retainer and v.seal/guide boss for those higher lift cams! If insufficient, expect damaged parts. |
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| Author: | Charrlie_S [ Sat May 17, 2003 9:01 am ] |
| Post subject: | |
I just noticed some thing about pushrods, last night while adjusting the valves on my rebuilt motor. I had shorter push rods, because of milling .100 of my head and .010 off the deck. I am running the same block, and head. Head gasket is .015 thicker. I changed the cam from a Crane with .434 lift, to the mopar .528 lift. Now my heavy duty pushrods are almost too short. My stock push rods would work, length wise, but I didn't think they would be strong enough, with dual springs. Evidently this cam has a smaller lobe base circle. So when considering if you need to get shorter push rods when milling, take into account how big a cam, will be used. The best way would be to assemble the engine, and measure. It is quite possible, milling .090, felpro type head gasket and a cam, with a lift in the .490 and up range, would not require shorter push rods. |
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| Author: | Dart270 [ Mon May 19, 2003 1:41 pm ] |
| Post subject: | |
I have run stock pushrods with cams in the 0.500" range and strong springs, and did not have any bend, BUT I did drive a couple of the upper cups down into the rod so I switched to the MP chromemoly units (cut to fit). No worries at all after that. Lou |
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| Author: | Rick Covalt [ Mon May 19, 2003 3:08 pm ] |
| Post subject: | Length? |
Charlie, You are right about the length on the .528 lift cam at least. We are running the Smith Brothers Chromemoly pushrods in the "stock" length. Rick |
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| Author: | Matt Cramer [ Mon May 19, 2003 7:45 pm ] |
| Post subject: | Chromemoly? |
I thought the main purpose of chrome-moly pushrods was so the pushrods wouldn't wear out as fast on guideplates? And a slant six doesn't have guideplates. Although I suppose if the pushrod buckled, a chromemoly one would be less likely to stay bent. Still, I'd think a larger diameter mild steel pushrod would be better for taking out some of the flex than a stock daimeter chromemoly. |
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