TSP/Trend 3/8" .135 pushrod WORKS!
06-12-2006, 09:52 AM
#1
*** NEW *** TSP/Trend 3/8" .135 pushrods WORK! We installed a set of these over the weekend on my solid roller to see if it would restore the power that seemed to have disappeared over the last couple of hundred miles. Install was straight forward, our ET 240s had just enough clearance for the oversided pushrods so they would simply drop right in. When we started the car it sounded slightly better, before the engine sounded like it didnt run consistent, now it has a normal cam lope. Anyways we got the car out on the road and made some pulls to 7800 RPMs and the only problem we saw was tire spin in 2nd and 3rd gear. Intake manifold vacuum was consistent with no signs of valve train bounce or float.
Another interesting article came from the latest 5.0 Mustang magazine. They tested Robin Lawrence's Real Street engine on a spintron to figure out how they could rev these motors to 8000 rpm with a hydraulic lifter.
They hooked up with Bob Fox owner of Trend Performance, Diamond Pistons, and Spintron. Long story short they tested the Trend 3/8" .135 pushrods vs 5/16" .080.
Results:
5/16" .080 lost control @ 7000 RPM
3/8" .135 lost control @ 7800 RPM
We've going to get a set of the 3/8" .135 wall pushrods setup for our hydralic combo and see how they work. More valvetrain stability is always a good thing.
Jason @ TSP is stocking these pushrods in the standard and precision finish.
Precision and Standard
Another interesting article came from the latest 5.0 Mustang magazine. They tested Robin Lawrence's Real Street engine on a spintron to figure out how they could rev these motors to 8000 rpm with a hydraulic lifter.
They hooked up with Bob Fox owner of Trend Performance, Diamond Pistons, and Spintron. Long story short they tested the Trend 3/8" .135 pushrods vs 5/16" .080.Results:
5/16" .080 lost control @ 7000 RPM
3/8" .135 lost control @ 7800 RPM
We've going to get a set of the 3/8" .135 wall pushrods setup for our hydralic combo and see how they work. More valvetrain stability is always a good thing.
Jason @ TSP is stocking these pushrods in the standard and precision finish.
Precision and Standard
Last edited by Phil99vette; 06-12-2006 at 12:31 PM.
06-12-2006, 12:39 PM
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I am glad that you liked the article. I am a little suprised to see it mentioned here.
I will be making the switch this year to LS based engine power as well as a Nostagia Pro Street Nova to race.
That story related to how I am able to spin a stock 5.0 based cam and un modified lifters to 8000 RPM. As I mentioned in the story with good pieces a stable valvetrain is possible even with steel valves. In our case class rules mandated the components that we use.
In the future I will be testing LS series engines on the SPin Tron.
And as Phil mentioned heavy isn't a factor. They will be full of oil anyway.
Robin
I will be making the switch this year to LS based engine power as well as a Nostagia Pro Street Nova to race.
That story related to how I am able to spin a stock 5.0 based cam and un modified lifters to 8000 RPM. As I mentioned in the story with good pieces a stable valvetrain is possible even with steel valves. In our case class rules mandated the components that we use.
In the future I will be testing LS series engines on the SPin Tron.
And as Phil mentioned heavy isn't a factor. They will be full of oil anyway.
Robin
06-12-2006, 01:11 PM
#7
Originally Posted by Robin L
I am glad that you liked the article. I am a little suprised to see it mentioned here.
I will be making the switch this year to LS based engine power as well as a Nostagia Pro Street Nova to race.
That story related to how I am able to spin a stock 5.0 based cam and un modified lifters to 8000 RPM. As I mentioned in the story with good pieces a stable valvetrain is possible even with steel valves. In our case class rules mandated the components that we use.
In the future I will be testing LS series engines on the SPin Tron.
And as Phil mentioned heavy isn't a factor. They will be full of oil anyway.
Robin
I will be making the switch this year to LS based engine power as well as a Nostagia Pro Street Nova to race.
That story related to how I am able to spin a stock 5.0 based cam and un modified lifters to 8000 RPM. As I mentioned in the story with good pieces a stable valvetrain is possible even with steel valves. In our case class rules mandated the components that we use.
In the future I will be testing LS series engines on the SPin Tron.
And as Phil mentioned heavy isn't a factor. They will be full of oil anyway.
Robin
Phil
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06-12-2006, 01:29 PM
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Originally Posted by Phil99vette
I heard NMRA has since outlawed the use of the Trend 3/8" Pushrods in your class.
Phil
Phil
Robin
06-12-2006, 04:03 PM
#11
Originally Posted by Phil99vette
I'm even thinking about going to 1/2" Pushrods.
If you have another problem let me know, I'm still suspect of the rocker geometry. The TFS head has a 1.5 degree angle change with stock length valves and uses a 7.700 (+.300") long pushrod and you have heads with a 4 degree change and a +.550" long valve and use a 7.850" long valve??? It just doesn't add up.
06-12-2006, 04:09 PM
#12
Makes sense. We did a rocker swipe test and the pattern on the valve tip is centered on the valve stem. Are there any other test to check rocker geometry? Last night we marked the stem with a black marker and looked fine.
If you went from a 15 degree to a 11 degree wouldn't you need a shorter pushrod if all was the same?
If you went from a 15 degree to a 11 degree wouldn't you need a shorter pushrod if all was the same?
06-12-2006, 05:07 PM
#14
Originally Posted by Beast96Z
I'm wondering about that myself. How come Hydraulic guys need 8.100-8.150's and your using 7.8x's? I know some rockers require shorter PR's, but that's a pretty big diffrence.
Phil
06-12-2006, 07:59 PM
#16
Try reading this site...http://mid-lift.com/.
By straightening the valves the rocker would have to be rolled over more to be centered.
By straightening the valves the rocker would have to be rolled over more to be centered.
06-12-2006, 08:01 PM
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Originally Posted by Brian Tooley
I had 3/8" to 7/16" dual taper Manton pushrods in my BBC, .850" lift, 340lbs seat, 800 open, never had a problem, you shouldn't have had the problem you had with the 5/16", we have used them with more cam and pressure then what you had.
If you have another problem let me know, I'm still suspect of the rocker geometry. The TFS head has a 1.5 degree angle change with stock length valves and uses a 7.700 (+.300") long pushrod and you have heads with a 4 degree change and a +.550" long valve and use a 7.850" long valve??? It just doesn't add up.
If you have another problem let me know, I'm still suspect of the rocker geometry. The TFS head has a 1.5 degree angle change with stock length valves and uses a 7.700 (+.300") long pushrod and you have heads with a 4 degree change and a +.550" long valve and use a 7.850" long valve??? It just doesn't add up.
Brian, I'm using the ETP 11* Heads as well, with stock rockers and Morel lifters..when I first set mine up (I say 1st cuz I'm goin to check length again with a different technique) I had the swipe centered @ 8.100", using TF 5/16" p.rods. Now I am trying to get the correct pre-load recommendation for Morels Hyd Roller Lifters and check again, plus I think I may have had the cam out of phase for checking. I will post up the findings though.
