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#1
01-05-2003, 01:36 PM
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new pistons
i am rebuilding my b18b for nos or a small turbo. What would be the best but fairly reasonable pistions to get and how are the rods and crank in these motors it only has 70,000 miles on it.
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#3
01-17-2003, 02:24 PM
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i bought a new crank and bearing also i got new eagle rods and i am hot tankin the block , i dissasembles the head and cleaned the valves i just need to know what compression pistons i should ge. I also had the head milled .030 .
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#5
01-26-2003, 11:31 PM
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stroked means that the cylinders suck more gas in and bored means that the cylinders can move up and down more right?
what does it mean if someones "polished" their engines what does it mean if they "mill their head"
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#7
01-27-2003, 07:41 AM
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bore size really doesnt equall anything . and stroke is the distance the piston moves up and down in the cylinder and when you increase stroke you increase dissplacement.
porting and polishing is done to a cylinder head to increase air flow and a smoother flow. you take metal out of the intake and exhaust ports to make them smooth milling a head i shaving of metal such as i had mine milled .03 of an inch and it increases engine compression.
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#8
01-27-2003, 09:01 AM
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Why did you mill the head was it slightly warped or something? If you are going n2o or turbo you want to keep low compression so that everything doesn't end up coming out! I you are really serious about turbo I would go with 8.5:1 and at the most 9.0:1 but I think that in your case the 8.5:1 would be better b/c your compression ratio is not going to be 8.5:1 with 8.5:1 pistons it is going to be slightly higher. And you don't have to buy a cam right now it can be easily change later. Just spend money on some thinks like a block guard, cylinder braces and such. Is the crank shaft a stock crank? Is it a b18b spec or b18c spec or what ? Is it a stroker crank? Did you bore the cylinders any? Boring the cylindres too much can weaken them especialy with a turbo application.
Hope some of this is some help, I just need more info to answer your question properly.
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#9
01-27-2003, 11:32 AM
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i am going all motor high compression im thinking 10.5:1 or so. you can still run turbo on a high compression car if you have forged pistons. All you are doing by turbo is increasing you cylinger pressure anyhow. Of cource you cant run much boost. but why rob your engine of hp to make horse power?if you drop your compression from 10.1 to 9.1 you just lost power, now then you turn around and turbo ($$$$$$) your car and it bumps the compression back up to 10.1 you just wasted 1 to 2 grand. for the sound of a blow off valve. That is why i am going high compression with a small short of nos.turbos dont make special horse power or even tourqe hp is hp. but anyhow i got a b18b1 crank it will be plenty i am looking to push 220 max. i want it to still be streetable
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#10
01-27-2003, 05:39 PM
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Quote:
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#11
01-28-2003, 10:15 AM
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that isnt intirely true you are taking exhaust gases to spoon the turbo but the turbo sucks atmospere air and you run it though an intercooler to chill it down againto force it into the cylinders with turbo u have a higher chance of detonation . with turbo you have to up grade your fuel managment also to run high bost , and you dont need to change any of that on a all motor setup. So a fully built all motor is cheaper than a built turbo. i guess it all in what you like
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