Rods now or later?
#1
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Rods now or later?
Hey guys,
I'm in the process of putting together parts for my turbo setup. I am debating whether or not I should build the bottom end now, or wait for an explosion? Can I install pistons and rods from the bottom of the engine or do I have to pull the head off? I just want to keep things under control because it's easy to get to the "I've already gone this far, what's another part" stage. I'm not planning to go near 300whp, but if I can slip in some rods with the engine out without removing the head, I'd go for it.
yes I know the engine must be pulled.
Thanks.
I'm in the process of putting together parts for my turbo setup. I am debating whether or not I should build the bottom end now, or wait for an explosion? Can I install pistons and rods from the bottom of the engine or do I have to pull the head off? I just want to keep things under control because it's easy to get to the "I've already gone this far, what's another part" stage. I'm not planning to go near 300whp, but if I can slip in some rods with the engine out without removing the head, I'd go for it.
yes I know the engine must be pulled.
Thanks.
#2
Been discussed a couple times recently. Here's the biggest thread of late...
https://www.miataturbo.net/forum/t42749/
https://www.miataturbo.net/forum/t42749/
#5
I view this more as a "build a motor" or "keep replacing" kind of decision.
You might as well leave it as is until you figure out what kind of power you're putting down. If you're close to 250whp...start building. No sense just putting in rods...might as well refresh everything.
I'm doing the same since I don't want to toss in another 1.6L every six months only to have rings die and risk a ventilated block. Forged rods, stock slugs, light headwork, new rings, bearings and gaskets. Drive happily up to 300whp without worries.
You might as well leave it as is until you figure out what kind of power you're putting down. If you're close to 250whp...start building. No sense just putting in rods...might as well refresh everything.
I'm doing the same since I don't want to toss in another 1.6L every six months only to have rings die and risk a ventilated block. Forged rods, stock slugs, light headwork, new rings, bearings and gaskets. Drive happily up to 300whp without worries.
#6
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I want to get a set of the M-Tuned rods at the current GB rate. If it's possible to do this without separating the head, then it would be a lot 'simpler'. Is it just as easy from the bottom?
I'm really hoping for no more than 260whp. And if a $300 set of rods is the only thing in the way of very good reliability and extra room for error then I'd rather do it (all other tuning variables aside)
I'm really hoping for no more than 260whp. And if a $300 set of rods is the only thing in the way of very good reliability and extra room for error then I'd rather do it (all other tuning variables aside)
#7
I wouldn't waste anytime trying to remove and install rod/piston assemblies from the bottom of the engine. How are you going to get the rod/piston out the bottom without removing the crankshaft? How are you going to avoid nicking the crank rod journals if you have to remove the crank while the rods/pistons are still in the engine? Even if you manage to get everything out, it is going to be even harder to re-assemble from the bottom. It will be difficult to fit/use a ring compressor on the bottom of the cylinder....
#9
I want to get a set of the M-Tuned rods at the current GB rate. If it's possible to do this without separating the head, then it would be a lot 'simpler'. Is it just as easy from the bottom?
I'm really hoping for no more than 260whp. And if a $300 set of rods is the only thing in the way of very good reliability and extra room for error then I'd rather do it (all other tuning variables aside)
I'm really hoping for no more than 260whp. And if a $300 set of rods is the only thing in the way of very good reliability and extra room for error then I'd rather do it (all other tuning variables aside)
#10
No, I'm doing just rods.
Supposedly stock pistons and a good tune can go up to 300whp...with ABSOLUTELY NO DETONATION. Det will kill the ring lands.
Price for pistons adds up, especially with the required machine shop work.
Either way I don't see how you're going to swap ANY internals without pulling the motor and completely disassembling anyhow.
Supposedly stock pistons and a good tune can go up to 300whp...with ABSOLUTELY NO DETONATION. Det will kill the ring lands.
Price for pistons adds up, especially with the required machine shop work.
Either way I don't see how you're going to swap ANY internals without pulling the motor and completely disassembling anyhow.
#13
I'm looking for 275whp, dependable and daily driveable without concerns...on the cheap.
#14
Some of Marc's recent posts indicate that this is the best route for those of us that just want to play around with a little more than our 250whp limit and aren't going to push the tune to the ragged edge.
I'm looking for 275whp, dependable and daily driveable without concerns...on the cheap.
I'm looking for 275whp, dependable and daily driveable without concerns...on the cheap.
Stock pistons, forged rods, 275ishwhp, and meth injection for safety
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