Well she started and runs
#63
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Thats good to hear on the noise.. i thought the same when i started mine and even the tuner was amazed lol.. He started asking what lifters i ran, who ground the cam, and all of the valvetrain details.. I can't hear the sewing machine sound until i listen real close to the head and i can kind of hear it, but once i step back i can't hear a thing, which is pretty awesome.
I found some pretty sweet exhaust clamps on amazon that are 3" and are kind of a sleeve style with thinner material that fits to the exhaust better.. try this link.. Seemed to seal mine up pretty well!
I found some pretty sweet exhaust clamps on amazon that are 3" and are kind of a sleeve style with thinner material that fits to the exhaust better.. try this link.. Seemed to seal mine up pretty well!
#65
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Cell phone microphones pick up highs very well and amplify them. I doubt that's how it sounded up close.
#76
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It is bothering me for sure. Couldn't find anything with stethoscope. Cylinder 7 has a very small tick maybe but nothing like what it sounds like out of the car. I gonna take off valve cover tonight and check rockers/push rods and prolly header and check gasket..
#77
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Soultion.
1) find a common pushrod length that gets all lifters in advertised preload range.
2) go with different length push rods to get a closer preload average.
3) go with a adjustable rocker setup and have precise preload control over each lifter. I am not sure why more folks do not go this route....It's what the SBC crowd has been doing for 30+ years.
I believe some of it has to do with the limited market for rockers. Stock is easier to control since they are light, but they cause premature valve guide wear at high lifts because they slide across the valve tip. Stock also makes getting proper preload a real chore in some applications.
Comp now makes a Ultra Pro that looks like a solid affordable piece and it can handle spring pressures north of 800lbs. The issue is they only come in 1.8 ratio which will not work for most and the adjuster nut will not clear stock valve covers without spacers. There is no perfect solution currently imo.
So I would definitely measure each cylinder even though it's a pain in the *** and see where you are at, then go from there.
#79
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I ended up with four different pr lengths on my old hydraulic setup. That said my lifter travel was only .058". Pretty much had to nail it.
The answer is stacked tolerances. Slight variation in many components slightly different valve seats, stem lengths, cam lobes, rocker cups, lifter heights, etc. if each one of those is 002 long you gain 010.
Usually though unless you have short travel lifters there is enough tolerance in the hydraulic lifter travel to compensate.
The answer is stacked tolerances. Slight variation in many components slightly different valve seats, stem lengths, cam lobes, rocker cups, lifter heights, etc. if each one of those is 002 long you gain 010.
Usually though unless you have short travel lifters there is enough tolerance in the hydraulic lifter travel to compensate.
#80
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This thread is packed full of great info! Thanks to the OP for sharing for sure. I will continue to reference this when I set up my valvetrain. I went with 7.4 PR's because I am a newb and was hoping to swap my stockers (7.4 in length) with the same measurement for my replacement. Hopefully I can use the 7.4's but I also am OCD lol. Look forward to seeing your results and also the car sounds great with your mods! Nicely done