push rod brands
Thread Starter
Registered User
Joined: Jul 2009
Posts: 4
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push rod brands does any body have any experience with any of these hardened pushrods and how do you feel about them?
SLP
Lunati
CompCam
TrickFlow
im running an LS1 w/ LS6 intake, Patriot 64cc heads, big cam.
thanks for any input.
SLP
Lunati
CompCam
TrickFlow
im running an LS1 w/ LS6 intake, Patriot 64cc heads, big cam.
thanks for any input.
I just purchased a set from Manton. The owner Terry is a GREAT guy and has no problem taking the time to set you up. FWIW an 11/32 pushrod clears the factory GM head without issue. That's a bit larger diameter than the stock 5/16 but provides a large margin of strength over them. If you would like more info PM me I have more detailed info.
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I spoke with Terry Manton about the issue of length when using the Comp telescopic pushrod measuring device. He told me most pushrod companies do not use that system and that Comp was the only one. He uses actual overall length. Using the Comp tool counting method of .050 per turn will give you a measurement that will be .020 shorter than it's actual overall length. Close the tool all the way and that is suppossed to be 6.800 but put a dial caliper on it and it will reveal 6.820. In my case I used the Comp tool like normal and added .020 plus my desired preload and they were on the money from Manton.
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As mentioned above, there's only a handful of pushrod manufacturer's in the country. Any of which will probably get the job done for you. We can get you setup with whatever length you need. Give us a shout if we can help!
Jon
Jon
I spoke with Terry Manton about the issue of length when using the Comp telescopic pushrod measuring device. He told me most pushrod companies do not use that system and that Comp was the only one. He uses actual overall length. Using the Comp tool counting method of .050 per turn will give you a measurement that will be .020 shorter than it's actual overall length. Close the tool all the way and that is suppossed to be 6.800 but put a dial caliper on it and it will reveal 6.820. In my case I used the Comp tool like normal and added .020 plus my desired preload and they were on the money from Manton.
I closed my Comp Cams 6.800 pushrod length checker all the way and measured with a vernier. It came out to 172.4mm, which is 6.7874". 6.800" is ~172.72mm, and if I set my vernier to that the closed checker is too short. But the difference is only .32mm, or .0126". You could just account for that and stay a little further away from the upper end of the recommended preload range.
After measuring the open length, I re-measured with the vernier. It would have been 6.800+9 turns x .050=7.250. The vernier said it was 183.7mm, or 7.23". That's 1.255mm/turn, or .0494"/turn for my particular checker. So (.050-.0494)*9 turns would make it .05" shorter, not .20" shorter.
So it looks like I need 7.23+.066 (min LS7 preload) =7.296 to 7.23+.097 (max LS7 preload)=7.327 length. 7.400-7.327-.073, so current rods are a bit long. The compresion test we did last April had consistent results, but the numbers were lower than expected. We didn't keep the throttle open nor did we usually use more than 3 hits on the dial. Maybe the low numbers were a result of the test method, or maybe the pushrod length is holding open the valves and losing compression also.
Did you order your pushrods direct from Manton? How long between order and parts in hand? What type of pushrod did you get... larger diameter, thicker wall, single/dual tapered, etc.?
TECH Fanatic
Joined: Jun 2002
Posts: 1,979
Likes: 3
From: Upstate NY
Not hardly. Most REALLY GOOD pushrods are made by Trend, Manton or Smith Brothers is much more correct.
There are other manufacturers of lower cost pushrods. They private label for a number of sellers.
I totally agree that Manton does a great job in product quality, fast delivery and great advice. For that you do pay more money than the big-box generic pushrods, but it surely is worth it.
Trend also does an excellent job as does Smith.
Jon
There are other manufacturers of lower cost pushrods. They private label for a number of sellers.
I totally agree that Manton does a great job in product quality, fast delivery and great advice. For that you do pay more money than the big-box generic pushrods, but it surely is worth it.
Trend also does an excellent job as does Smith.
Jon
I am currently working with Trend on a set of custom double tapered pushrods. I have spoke to Terry Manton as well. All of these companies go the extra mile to help as this is their business. The key is to have the correct measurement prior to ordering. I still can't figure out why most guys insist on just dumping in 7.400" pushrods and calling it a day. The extra time to measure and get perfect pushrods is literally a matter of days and with the cost of the installed parts it is really foolish not to do this. Guys will spend thousands on parts but no $20 on an adjustable pushrod.
I re-measured my installed pushrod length today and stumbled across this thread trying to validate results. We re-used my previous 7.400" pushrods when we switched from a LSK-> XFI lobes and from CTSV->LS7 lifters.
I closed my Comp Cams 6.800 pushrod length checker all the way and measured with a vernier. It came out to 172.4mm, which is 6.7874". 6.800" is ~172.72mm, and if I set my vernier to that the closed checker is too short. But the difference is only .32mm, or .0126". You could just account for that and stay a little further away from the upper end of the recommended preload range.
After measuring the open length, I re-measured with the vernier. It would have been 6.800+9 turns x .050=7.250. The vernier said it was 183.7mm, or 7.23". That's 1.255mm/turn, or .0494"/turn for my particular checker. So (.050-.0494)*9 turns would make it .05" shorter, not .20" shorter.
So it looks like I need 7.23+.066 (min LS7 preload) =7.296 to 7.23+.097 (max LS7 preload)=7.327 length. 7.400-7.327-.073, so current rods are a bit long. The compresion test we did last April had consistent results, but the numbers were lower than expected. We didn't keep the throttle open nor did we usually use more than 3 hits on the dial. Maybe the low numbers were a result of the test method, or maybe the pushrod length is holding open the valves and losing compression also.
Did you order your pushrods direct from Manton? How long between order and parts in hand? What type of pushrod did you get... larger diameter, thicker wall, single/dual tapered, etc.?
I closed my Comp Cams 6.800 pushrod length checker all the way and measured with a vernier. It came out to 172.4mm, which is 6.7874". 6.800" is ~172.72mm, and if I set my vernier to that the closed checker is too short. But the difference is only .32mm, or .0126". You could just account for that and stay a little further away from the upper end of the recommended preload range.
After measuring the open length, I re-measured with the vernier. It would have been 6.800+9 turns x .050=7.250. The vernier said it was 183.7mm, or 7.23". That's 1.255mm/turn, or .0494"/turn for my particular checker. So (.050-.0494)*9 turns would make it .05" shorter, not .20" shorter.
So it looks like I need 7.23+.066 (min LS7 preload) =7.296 to 7.23+.097 (max LS7 preload)=7.327 length. 7.400-7.327-.073, so current rods are a bit long. The compresion test we did last April had consistent results, but the numbers were lower than expected. We didn't keep the throttle open nor did we usually use more than 3 hits on the dial. Maybe the low numbers were a result of the test method, or maybe the pushrod length is holding open the valves and losing compression also.
Did you order your pushrods direct from Manton? How long between order and parts in hand? What type of pushrod did you get... larger diameter, thicker wall, single/dual tapered, etc.?
I decided to order from Terry Manton. Went with 7.320 3/8"x.083 straight, 5/16" 240* ends. All of his are 3-piece pushrods, custom made length's to within .005, not in stock but done in a day. Terry believes the ends of the pushrod serves a different purpose than the tubing, and thus should be made differently, thus they are pressed in not welded. Should have them Friday. $10.31 each.
Got the pushrods. Invoice says 7.315 vs the 7.320 I ordered. Can't measure until I get home. I'll put a a pic later today of the design.
Edit:
Measured with the vernier and they all are about 184.8 (~7.28"). I asked them about it being a little short, especially after they made a big deal out of getting any length you want down to .005 (although I didn't say that latter part). Now I'm told you can request any length to within .005, but their tolerance is also within .005 (which Terry didn't tell me). But I'm told they are all hand assembled and the length verified. So maybe my vernier is a little off, although it zero's fine? Their measurement of 7.315" would put it in the middle of the previous range I calculated, but they're .035" short by my measurements, and if that's accurate, my preload will only be .05.
So I guess I don't know what to trust until I try one. Hopefully it's negligible.
Edit:
Measured with the vernier and they all are about 184.8 (~7.28"). I asked them about it being a little short, especially after they made a big deal out of getting any length you want down to .005 (although I didn't say that latter part). Now I'm told you can request any length to within .005, but their tolerance is also within .005 (which Terry didn't tell me). But I'm told they are all hand assembled and the length verified. So maybe my vernier is a little off, although it zero's fine? Their measurement of 7.315" would put it in the middle of the previous range I calculated, but they're .035" short by my measurements, and if that's accurate, my preload will only be .05.
So I guess I don't know what to trust until I try one. Hopefully it's negligible.
Last edited by JimMueller; Sep 17, 2009 at 05:39 PM.