Piston selection...
Piston selection... Looking for some cheap hypereutectic pistons. This is for a budget 350 mostly stock rebuild. Just wanna raise the comp. a little and hit her with a 150 shot. The 5k AI forged longblock will come later down the road. Just lookin for some decent ones for the time being.
Last edited by projekt70chevelle; Apr 16, 2008 at 10:04 PM.
Check out Summit Racing "Speed Pro, Fel-Pro" Piston Kit Combo. You can pick out either forged or hyper-eutectic pistons, rings, cam rod and crank bearings, gaskets, oil pump, freeze plugs, and sure there is a few things I'm forgetting. Kit can probably be bought and sent to your home around $640.00 if not less.
And by the way the Forged Pistons are rated at 10.40:1 compression on a 58cc combustion chamber.
The hyper-eutectic pistons are rated at 9.xx:1 with 58cc combustion chamber.
The hyper-eutectic pistons are rated at 9.xx:1 with 58cc combustion chamber.
Last edited by Prototype007; Apr 16, 2008 at 09:50 PM. Reason: I can't spell
Check out Summit Racing "Speed Pro, Fel-Pro" Piston Kit Combo. You can pick out either forged or hyper-eutectic pistons, rings, cam rod and crank bearings, gaskets, oil pump, freeze plugs, and sure there is a few things I'm forgetting. Kit can probably be bought and sent to your home around $640.00 if not less.
Also, that was actually the exact kit i was looking at. The thing is, I wouldnt really need everything in that kit (i.e. hi-flow oil pump since i already have one and the cam bearings/freeze plugs will be provided by the machine shop im taking the block to). So after adding up the necessary parts from the kit, minus the unneeded parts, it lands me right around 293.71 plus shipping. Thats about half the cost of that kit.
So now I am left with the choice of pistons. Summit has a huge selection of Keith Black pistons, but i'm just not sure which ones to choose from. i want the compression to remain around stock, if not closer to 11:1. Keep in mind i just want some cheap decent pistons that will hold up to a 150 shot until i have the cash saved up for the real build.
Last edited by projekt70chevelle; Apr 17, 2008 at 07:17 AM.
Aren't the stock heads 58cc??
Also, that was actually the exact kit i was looking at. The thing is, I wouldnt really need everything in that kit (i.e. hi-flow oil pump since i already have one and the cam bearings/freeze plugs will be provided by the machine shop im taking the block to). So after adding up the necessary parts from the kit, minus the unneeded parts, it lands me right around 293.71 plus shipping. Thats about half the cost of that kit.
So now I am left with the choice of pistons. Summit has a huge selection of Keith Black pistons, but i'm just not sure which ones to choose from. i want the compression to remain around stock, if not closer to 11:1. Keep in mind i just want some cheap decent pistons that will hold up to a 150 shot until i have the cash saved up for the real build.
Also, that was actually the exact kit i was looking at. The thing is, I wouldnt really need everything in that kit (i.e. hi-flow oil pump since i already have one and the cam bearings/freeze plugs will be provided by the machine shop im taking the block to). So after adding up the necessary parts from the kit, minus the unneeded parts, it lands me right around 293.71 plus shipping. Thats about half the cost of that kit.
So now I am left with the choice of pistons. Summit has a huge selection of Keith Black pistons, but i'm just not sure which ones to choose from. i want the compression to remain around stock, if not closer to 11:1. Keep in mind i just want some cheap decent pistons that will hold up to a 150 shot until i have the cash saved up for the real build.
Cheap piston that will hold up to 150 shot would be a stock piston. They are Mahle pistons and can handle 150 shot all day long as long as you don't detonate. You can run an impy head gasket to bump the compression a little too. I thought about running a SpeedPro claimer type piston, but they really aren't needed and from what I understand they are pretty heavy as well.
Well i know that some people spray 150 through their stock bottomed LT1's all the time... the thing is, I'm sure it must take a huge toll on the motor. I'm not really sure what parts are more commonly worn down by this, but i would think its the pistons/rings that take the most abuse. I just figured if i can find some cheap pistons that will hold up better i might as well throw them in while shes torn down.
The thing is, i just find it hard to believe that a 150 shot isn't really hurting the stock bottomend at all. If someone could verify, from their experience, that a hit that big with long term use wouldnt cause much wear then i would be much more inclined to stick with the stockers.
The thing is, i just find it hard to believe that a 150 shot isn't really hurting the stock bottomend at all. If someone could verify, from their experience, that a hit that big with long term use wouldnt cause much wear then i would be much more inclined to stick with the stockers.
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Just search for nitrous and stock pistons and you will get plenty of threads. It's asked quite a lot. Also if you are worried about hurting hyper pistons, then why are you looking into another set? Why not just get a forged piston? There are plenty for sale laying around, I have a set and I'm sure plenty of others do as well. Going to be more than $200 though.
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Verdad Gallardo Check out Summit Racing "Speed Pro, Fel-Pro" Piston Kit Combo. You can pick out either forged or hyper-eutectic pistons, rings, cam rod and crank bearings, gaskets, oil pump, freeze plugs, and sure there is a few things I'm forgetting. Kit can probably be bought and sent to your home around $640.00 if not less.
Anyways, tore down another block i had with approx. 60k on it and the crank/rod/bearing surfaces seem to have minimal wear. Now im trying to decide how car to go with machining.
I have to get it at least honed (because of minor surface rust in the cylinder walls) and cam bearings pressed in. Now if i use the same rods and crank would it be necessary to get the assembly rebalanced>??
Keep in mind i am doing a 6speed swap at the same time (not sure if you have to get the assembly balanced to the new flywheel or not).
Let me know what you guys think i should do......
So i am pretty sure that im going with the a budget kit listed above with the forged pistons, although i still need to find a way to calculate the compression with those pistons. I believe that the advertised comp. is with a .30 over piston and with 58cc heads, so im not sure how that translates to stock bore and heads.
Anyways, tore down another block i had with approx. 60k on it and the crank/rod/bearing surfaces seem to have minimal wear. Now im trying to decide how car to go with machining.
I have to get it at least honed (because of minor surface rust in the cylinder walls) and cam bearings pressed in. Now if i use the same rods and crank would it be necessary to get the assembly rebalanced>??
Keep in mind i am doing a 6speed swap at the same time (not sure if you have to get the assembly balanced to the new flywheel or not).
Let me know what you guys think i should do......
Anyways, tore down another block i had with approx. 60k on it and the crank/rod/bearing surfaces seem to have minimal wear. Now im trying to decide how car to go with machining.
I have to get it at least honed (because of minor surface rust in the cylinder walls) and cam bearings pressed in. Now if i use the same rods and crank would it be necessary to get the assembly rebalanced>??
Keep in mind i am doing a 6speed swap at the same time (not sure if you have to get the assembly balanced to the new flywheel or not).
Let me know what you guys think i should do......
If you want we may try and discuss a sell if you want. My kit was supposed to be in yesterday, but didn't show up.
I actually bought the kit I was telling you about and now I wish I didn't because I need to go ahead and just buy my other block a whole new rotating assembly.
If you want we may try and discuss a sell if you want. My kit was supposed to be in yesterday, but didn't show up.
If you want we may try and discuss a sell if you want. My kit was supposed to be in yesterday, but didn't show up.
The stock LT1 combustion chamber is ~54.5 cc. With those Speed Pro +.030 pistons you're looking at about 10.8:1 compression with .045 head gaskets. A nice little bump over stock but nothing crazy. Using the .028 headgaskets yields about 11.2:1.
What about standard bore size?? And also, would a 150 shot be pushing me to close to the possibility of detonation (i will be getting a mail order tune from pcm4less/madz28 and include the nitrous application in the tune specs)??
Also, where would i get those gaskets from?>
Also, where would i get those gaskets from?>
Anyways, tore down another block i had with approx. 60k on it and the crank/rod/bearing surfaces seem to have minimal wear. Now im trying to decide how car to go with machining.
I have to get it at least honed (because of minor surface rust in the cylinder walls) and cam bearings pressed in. Now if i use the same rods and crank would it be necessary to get the assembly rebalanced>??
Keep in mind i am doing a 6speed swap at the same time (not sure if you have to get the assembly balanced to the new flywheel or not).
Let me know what you guys think i should do......
I have to get it at least honed (because of minor surface rust in the cylinder walls) and cam bearings pressed in. Now if i use the same rods and crank would it be necessary to get the assembly rebalanced>??
Keep in mind i am doing a 6speed swap at the same time (not sure if you have to get the assembly balanced to the new flywheel or not).
Let me know what you guys think i should do......
What about standard bore size?? And also, would a 150 shot be pushing me to close to the possibility of detonation (i will be getting a mail order tune from pcm4less/madz28 and include the nitrous application in the tune specs)??
Also, where would i get those gaskets from?>
Also, where would i get those gaskets from?>
Everything will have to be balanced along with your flywheel if you change out the pistons to anything other than stock.
