Wiseco Pro Tru +4cc Dome Piston Set
Wiseco Pro Tru +4cc Dome Piston Set Anybody have any feedback on these or have used them?
Wiseco Pro Tru +4cc Dome Piston Set for 3.622" Stroke...... Looking to bump up compression on my build without having to deck the heads more and worry about PTV, Info on the build, LS1 block, Torquer V2 112cam, comp trunion upgrade ls7 lifters, ls2 trays, , PRC .650 dual valve springs, ported and decked .025 241 heads, LS6 intake, 1 3/4 Pacestter headers, 3' y with 4"catback and Vig 3600 stall. Car will be DD with occasional trips to the Dragstrip, since I'm only a mile from Atlanta Dragway
Wiseco Pro Tru +4cc Dome Piston Set for 3.622" Stroke...... Looking to bump up compression on my build without having to deck the heads more and worry about PTV, Info on the build, LS1 block, Torquer V2 112cam, comp trunion upgrade ls7 lifters, ls2 trays, , PRC .650 dual valve springs, ported and decked .025 241 heads, LS6 intake, 1 3/4 Pacestter headers, 3' y with 4"catback and Vig 3600 stall. Car will be DD with occasional trips to the Dragstrip, since I'm only a mile from Atlanta Dragway
Last edited by keith102371; Dec 15, 2012 at 07:54 AM.
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I don't have any personal experience with these specific pistons but I have had a good amount of Wiseco products and I can say they are top notch when it comes to their quality. I have a set of their -3cc Dome pistons in my engine right now. IIRC my compression was like mid 11.5:1 or right around there with stock chamber 243 heads. It been a while so I may not be exact on the compression but its close. I would still check PTV clearance in any build I am putting aftermarket pistons it just to make sure, especially since you said you 241s are decked .025.
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My mistake, I had a typo and didn't check it over cause I was on my way out of the house. My compression is around 11.2ish. My pistons are flat tops with -3cc valve reliefs. I am also running a 6.125 rod and the block has been decked.
Last edited by 2000PewterT/A; Dec 15, 2012 at 04:18 PM.
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Never had it dyno I since I did allot of the tuning myself with help from friends. I would say in the 425-435 range would be a safe estimate without overstating anything. I do plan to throw it on the dyno this spring just for fun to see what it makes.
was looking at these pistons also....OP did you end up finding anything else out about them? they come with a 0.943" wrist pin, which I believe is floating. do you have stock rods?
They seem to be ideal for bumping compression - with a 0.045" gasket and your heads you'd be around 11.5:1 and 0.036" for quench on 6.098" rods. You gotta be careful with the DCR though, not sure where that would fall for your motor - depends on your cam specs.
They seem to be ideal for bumping compression - with a 0.045" gasket and your heads you'd be around 11.5:1 and 0.036" for quench on 6.098" rods. You gotta be careful with the DCR though, not sure where that would fall for your motor - depends on your cam specs.
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OP, just called wiseco. These pistons are designed to be used with the Gen IV LS1, a'la the 04 GTO that has revised connecting rods with a bushed small end to work with floating pins. These wouldn't work with Gen III LS1 motors that have press fit rods unless you get your rods machined.
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Bringing this back.
I like these pistons. A more budget oriented piston but with a lot of Wiseco's good features... and a nice 4cc dome.
If you run the Scat or Compstar 6.100" rods designed for the stock .945" wristpin, you'd have a nice rebuild on your hands... Especially with the Scat rods with the 8740 rod material. You'd be around $560 for the pistons and $445 for the rods. So 1k for 2618 pistons and 4340 H-Beam rods. Sounds good to me. Add rings and new bearings, a light hone, balancing assembly, and machine shops costs and you could be in a shortblock that could handle 750HP for 2200 or so.
I like these pistons. A more budget oriented piston but with a lot of Wiseco's good features... and a nice 4cc dome.
If you run the Scat or Compstar 6.100" rods designed for the stock .945" wristpin, you'd have a nice rebuild on your hands... Especially with the Scat rods with the 8740 rod material. You'd be around $560 for the pistons and $445 for the rods. So 1k for 2618 pistons and 4340 H-Beam rods. Sounds good to me. Add rings and new bearings, a light hone, balancing assembly, and machine shops costs and you could be in a shortblock that could handle 750HP for 2200 or so.
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From: BFE
Guys domed pistons is an old school habit. Not very reliable in LS because of the knock sensors atop the motor. In race only engines that is different but for street I would avoid such practice on a III Gen LS motor.
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From: BFE
From my experience yes, finally had to run race fuel. I tried various combinations and results were similar in most if not all cases, after awhile I said f88k it and took the domes out for some flattops. I just got tired of kr and since this was a street motor I just went back to base.
Not very reliable in LS because of the knock sensors atop the motor.
