S2000 Under The Hood S2000 Technical and Mechanical discussions.

Engine rebuild

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Old Feb 6, 2021 | 02:56 PM
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Default Engine rebuild

I am trying to rebuild my engine. I work at a honda dealership, one of my coworkers is a huge honda junky. He says I do not need to hone the cylinders with new Pistons because it is a honda and they don't typically need that. Everyone else I speak to say to hone the cylinders every time you put in new Pistons. My s2000 is my daily driver and my only vehicle. Sending it to a machine shop would leave me without a vehicle for awhile. Any advice? My engine has 260k miles on it. It doesn't need a rebuild, but it isn't producing as much power as it should be. Psi is 180 across the board.
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Old Feb 6, 2021 | 03:33 PM
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Measure the bores. You can't build an engine without measuring the tolerances on the parts. You only get one shot at this. I wouldn't do anything more than use a 800 grit silicon carbide ball hone if the bores are in good shape. Use lots of oil and go slowly and carefully. All you're doing is giving the rings a mating surface to break them in. You don't need to do a full hone with diamond stones and a honing machine, if the bores aren't scratched or overly ovaled.

9/10 the rings will wear before the cylinder..

You should stick to OEM pistons. Measure and inspect.
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Old Feb 6, 2021 | 04:02 PM
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Originally Posted by Slowcrash_101
Measure the bores. You can't build an engine without measuring the tolerances on the parts. You only get one shot at this. I wouldn't do anything more than use a 800 grit silicon carbide ball hone if the bores are in good shape. Use lots of oil and go slowly and carefully. All you're doing is giving the rings a mating surface to break them in. You don't need to do a full hone with diamond stones and a honing machine, if the bores aren't scratched or overly ovaled.

9/10 the rings will wear before the cylinder..

You should stick to OEM pistons. Measure and inspect.
I'm planning on putting in stronger internals. Factory measurements though. I want to eventually supercharge it.
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Old Feb 6, 2021 | 04:13 PM
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Originally Posted by Slowcrash_101
Measure the bores. You can't build an engine without measuring the tolerances on the parts. You only get one shot at this. I wouldn't do anything more than use a 800 grit silicon carbide ball hone if the bores are in good shape. Use lots of oil and go slowly and carefully. All you're doing is giving the rings a mating surface to break them in. You don't need to do a full hone with diamond stones and a honing machine, if the bores aren't scratched or overly ovaled.

9/10 the rings will wear before the cylinder..

You should stick to OEM pistons. Measure and inspect.
Also, i'm 20. I don't have the experience honing anything. But I also don't want to spend the $8000 though to have a shop rebuild it for me.
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Old Feb 6, 2021 | 07:22 PM
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Originally Posted by MrMo
I'm planning on putting in stronger internals. Factory measurements though. I want to eventually supercharge it.
don’t do this^

the F20/22 handles boost just fine with stock components and they will outlast anything aftermarket. Your best bet is all oem.

Separately a supercharger is not going to stress the motor enough to warrant changing anything from stock. maybe 1000hp on a big turbo but even then guys are using stock blocks well over 600hp.
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Old Feb 6, 2021 | 07:56 PM
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Originally Posted by MrMo
I'm planning on putting in stronger internals. Factory measurements though. I want to eventually supercharge it.
The stock block has no problem making 350lb-ft of tq. Why you'd want more than that is beyond me. This car gets scary with 270lb ft. Just make sure you get a good tuner, and don't lug the engine.

To be honest if the block has consistent compression numbers I would have just let it be. If the block is already apart measure everything and put it back together with new rings and no more(maybe new oil jets, but that's not for novices). Follow the service manual to a T, I cannot stress this enough, engine building is serious business, you cannot afford to make any mistakes on assembly.
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Old Feb 6, 2021 | 08:01 PM
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Originally Posted by Slowcrash_101
The stock block has no problem making 350lb-ft of tq. Why you'd want more than that is beyond me. This car gets scary with 270lb ft. Just make sure you get a good tuner, and don't lug the engine.

To be honest if the block has consistent compression numbers I would have just let it be. If the block is already apart measure everything and put it back together with new rings and no more(maybe new oil jets, but that's not for novices). Follow the service manual to a T, I cannot stress this enough, engine building is serious business, you cannot afford to make any mistakes on assembly.
I drove a co-workers ap2 before he sold it a month ago. I own an ap1. His ap2 had 80k miles on it. It felt so fast and powerful. Compared to mine, mine feels very worn out and lacking power. I know the f22c engine has more low end torque, but I feel like it's more than just that difference. I bought the car back in March of 2020. Since then, I feel like it has lost more power. An engine rebuild is really the only thing I have in mind to fix that. Guess I'll stick to factory parts. I work at a honda dealership so at least I'll get a discount off these expensive oem parts.
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Old Feb 6, 2021 | 08:07 PM
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Originally Posted by MrMo
I drove a co-workers ap2 before he sold it a month ago. I own an ap1. His ap2 had 80k miles on it. It felt so fast and powerful. Compared to mine, mine feels very worn out and lacking power. I know the f22c engine has more low end torque, but I feel like it's more than just that difference. I bought the car back in March of 2020. Since then, I feel like it has lost more power. An engine rebuild is really the only thing I have in mind to fix that. Guess I'll stick to factory parts. I work at a honda dealership so at least I'll get a discount off these expensive oem parts.
Do you have a dyno near you? I've driven both ap1 and 2. The 2.2 extra torque is very noticeable in lower rpms.
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Old Feb 6, 2021 | 08:11 PM
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Originally Posted by Monopoly
Do you have a dyno near you? I've driven both ap1 and 2. The 2.2 extra torque is very noticeable in lower rpms.
Yeah, I live in the st louis metro area. So I can just hop over the river and get it dynoed in st louis.
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Old Feb 6, 2021 | 08:12 PM
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Originally Posted by Monopoly
Do you have a dyno near you? I've driven both ap1 and 2. The 2.2 extra torque is very noticeable in lower rpms.
Lately, it seems like if I floor it, nothing really happens. I feel like acceleration has greatly declined since owning the vehicle.
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