What should be considered as a BUILT Motor?
07-03-2001, 09:59 PM
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What should be considered as a BUILT Motor?
What is a built motor? I'm talking about the bottom end, resleeved block, stronger pistons and rods, are these enough for 20psi+ of boost on a H22A? how do you build a motor??
07-04-2001, 12:48 AM
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Re: What should be considered as a BUILT Motor? (TurboInteg95)
that's all for a fully built bottom end? is it possible to do the job without pulling the motor out of the car?
07-04-2001, 08:17 AM
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Re: What should be considered as a BUILT Motor? (mike2016)
once u get into building your motor... u will realize it is much easier to just pull the motor out than to do anywork in the car... as for building the block... u have to send away your bare block to a machine shop
07-04-2001, 09:05 AM
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Re: What should be considered as a BUILT Motor? (mike2016)
Yeah you have to send your block with the pictons and rods to a machine shop so they can make sure the cylinders are the correct bore after they resleeve it and also so they can balance everything.
07-04-2001, 11:39 AM
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Re: What should be considered as a BUILT Motor? (TurboInteg95)
normally how much it runs for sleeving, pistons and rods ? what kind of tools I will need to pull the motor out?
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07-04-2001, 04:41 PM
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Re: What should be considered as a BUILT Motor? (mike2016)
you just need normal tools to pull the engine out. Pretty mucha good socket set with all metric is nice to half. And a good lift or bunch of guys to help you lift. The cost of rebuilding a full motor is fairly decent. I usually build them for around 2200 fully built with sleeves.
07-04-2001, 04:57 PM
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Re: What should be considered as a BUILT Motor? (b18bturbo)
How long it takes to build a motor? for a daily driven car, is it illegal? if I'm going to sell the car in the future, is there any problem?
07-04-2001, 05:01 PM
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Re: What should be considered as a BUILT Motor? (wantgoback)
no there is no problem. It is not illegal if you keep your emmision controls. There is no proble in the resale dept.
07-04-2001, 05:09 PM
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Re: What should be considered as a BUILT Motor? (b18bturbo)
If you're planning on running 20+ psi, you should also get stronger headbolts. Try getting a good headgasket too.. although the Honda ones have been pretty strong. Yes, a rebuilt bottom end consists of forged pistons (preferably low compression), forged rods, strong piston rings, and the whole assembly balanced. A good machine shop would want you to also include your flywheel and pressure plate to balance the whole rotating assembly. There are things to keep in mind when you go with a built motor. Dont plan on this motor being a 100+k mile motor like factory. Forged internals and gapless rings do not go well with daily driving. Usually, forged internals dont expand and contract the same way factory internals do.. so the engine will sound sorta like a diesel when the engine's cold and it'll cause more wear on the cylinder walls. The gapless rings basically prevent blowby totally.. that's a bad thing under normal driving conditions. There should always be some amount of blowby in a daily driven car. You see, usually forged internals go into race engines.. engines that are meant to be torn down every once in a while. This is just to warn you about the longevity or lack of in a built motor... happy boosting though! 
07-04-2001, 07:09 PM
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Re: What should be considered as a BUILT Motor? (Rob92SC)
that sucks... so a built motor won't last long? Is there any other way to increase boost level on a stock motor other than build it? how about normal pistons with lower compression ratio and stronger rods?
07-04-2001, 08:28 PM
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Re: What should be considered as a BUILT Motor? (mike2016)
stock pistons (which are cast) tend to melt under hi-boost... hence why people go with forged pistons... the only way to go higher boost is to build the motor... id say up to 12 psi on stock internals with engine management... 15psi with engine management and internals... 15psi+ with sleeves
07-04-2001, 11:33 PM
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Re: What should be considered as a BUILT Motor? (4dr-gsr)
As for pistons, you can try this: Get forged pistons but have your machine shop run REALLY tight clearances between the cylinder wall and the piston. This really narrow clearance will prevent the piston to get in any odd angle against the cylinder wall when the engine isn't warmed up properly. However, you have to get thin sythetic oil and change it often!
For the rings: You can get custom made piston rings by Hastings. They will make the rings to your specifications.. tell'em you're going to have forced induction but you want some blowby for daily driving purposes. These rings are suprisingly cheap too!
For the rings: You can get custom made piston rings by Hastings. They will make the rings to your specifications.. tell'em you're going to have forced induction but you want some blowby for daily driving purposes. These rings are suprisingly cheap too!
07-05-2001, 12:16 AM
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Re: What should be considered as a BUILT Motor? (Rob92SC)
Thanks a lot... you guys are pro... i still have some questions, are all aftermarket pistons forged? what is a melt piston? what is "blowby"?
07-05-2001, 11:41 PM
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Re: What should be considered as a BUILT Motor? (mike2016)
Blow-by is when oil goes past your rings and gets burned up a little.. it is not too bad unless there's an excess of it. Gapless piston rings basically prevent this.. so your motor is running tighter without any oil escaping into the combustion chamber.. but for daily driving a small amount of blowby is healthy.
Yes, most aftermarket pistons are forged.. you gotta find out exactly what metal alloys they use though.
Yes, most aftermarket pistons are forged.. you gotta find out exactly what metal alloys they use though.
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