Is 5/16 0.80 pushrod sufficient for Duals & small cam?
#1
TECH Regular
Thread Starter
Is 5/16 0.80 pushrod sufficient for Duals & small cam?
Hi is a 5/16" cromoly 0.80" thick pushrod sufficient for my mild set up. Its a mild cam but my springs are not they are dual Pac springs, cam is 217/228 110 lsa .590 Valve lift. Don't imagine I'll ever Rev past 6500 more likely closer to 6000.
I wanted to use 11/32 but can't find them here in Australia in my 7.275" length. 5/16 thick 0.80 Wall is best I can do here.
Almost everywhere I've searched says use thicker pushrods if possible.
I wanted to use 11/32 but can't find them here in Australia in my 7.275" length. 5/16 thick 0.80 Wall is best I can do here.
Almost everywhere I've searched says use thicker pushrods if possible.
Last edited by TimsLS1; 03-16-2020 at 04:06 PM.
#2
ModSquad
iTrader: (6)
7.275 11/32 pushrods can be had from any pushrod vendor. Nobody in Australia has them? I know you guys pay a premium for import fees, but you can get them all day long, if ordering a set is feasible and you have the time.
What are the springs rated for, seat and over the nose?
What are the springs rated for, seat and over the nose?
#3
TECH Regular
Thread Starter
Thanks, Sorry correction I found one in Australia that has 7.275 11/32 but I don't trust them. The others and two large vedors in USA got back to me this morning and don't have them either. The springs are as follows.
- Install Load (LB): 160
- Install Height (in): 1.800
- Open Load (LB): 425
- Open Height (in): 1.125
- Coil Bind Max (in): 1.020
- Damper: No
- Rate: 392
Last edited by TimsLS1; 03-16-2020 at 05:45 PM.
#4
ModSquad
iTrader: (6)
Call Manton Pushrods. They will build you a nice set. I ordered my last set from them, and had them in my shop in 5 days. Freaky fast turnaround, and they build pushrods for anything, from a 60 hp 4 cylinder to a 12k hp top fuel engine.
#5
TECH Regular
Thread Starter
Thanks,
Its very expensive with our Aussie dollar trading at 61 cents, I'll keep looking locally, would be nice to know if a an 0.80 wall 5/16 would be sufficient. But I'm guessing probably not from your reply.
Its very expensive with our Aussie dollar trading at 61 cents, I'll keep looking locally, would be nice to know if a an 0.80 wall 5/16 would be sufficient. But I'm guessing probably not from your reply.
#6
ModSquad
iTrader: (6)
The 5/16 rods will work. But the 11/32 rods will do the job with much less flex. Anytime you can increase the diameter of your pushrods, it’s always a good thing.
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#8
TECH Regular
Thread Starter
Thanks I thought so, although I'm am using slow leak down lifters, I would have thought that they would not compress as easily as a standard lifter and might need a stiffer pushrod?
I wasn't sure if many people used the 5/16 0.80 with bigger cams largely due ignorance on the whole subject.
I found some pushrods for it locally in Australia $214 for 5/16 0.80 wall and $279 for 11/32 0.80 wall. This is the last thing I have to buy for my expensive basic rebuild, just didn't want to let the rest of set up down.
I was given a cheap vehicle by my mum as a gift yesterday so I no longer have to use my LS1 as my daily, could even go hotter cam now as fuel economy doesn't matter much anymore and don't have to use it for driving in slow traffic.
I wasn't sure if many people used the 5/16 0.80 with bigger cams largely due ignorance on the whole subject.
I found some pushrods for it locally in Australia $214 for 5/16 0.80 wall and $279 for 11/32 0.80 wall. This is the last thing I have to buy for my expensive basic rebuild, just didn't want to let the rest of set up down.
I was given a cheap vehicle by my mum as a gift yesterday so I no longer have to use my LS1 as my daily, could even go hotter cam now as fuel economy doesn't matter much anymore and don't have to use it for driving in slow traffic.
Last edited by TimsLS1; 03-18-2020 at 02:01 PM.
#9
TECH Regular
Thread Starter
You are correct I found this in link, the difference is too minimal for me to be concerned about.
https://ls1tech.com/forums/dynamomet...sure-diff.html
https://ls1tech.com/forums/dynamomet...sure-diff.html
#10
You are correct I found this in link, the difference is too minimal for me to be concerned about.
https://ls1tech.com/forums/dynamomet...sure-diff.html
https://ls1tech.com/forums/dynamomet...sure-diff.html
i remember that dyno from years ago when i was worried about the same thing... with mild to moderate setups, the 5/16ths are definitely adequate for the job.