Forged Rods/Pistons stock crank

BadChachi

Is it possible to run forged rods and pistons on stock crankshaft?

Reason I ask is I need to rebuild or grab a new transmission. Someone told me that having a new trans would be harsh with a used motor. How accurate is that? I guess what I am trying to say is, is it best to upgrade to forged internals upon installing the new or rebuilt trans?

My thought process is that if I replace my internals it will help correspond with the new trans....if that even makes sense?? Or can I just install a new trans and not have to worry about the motor? I currently have 90K miles its been through 2 owners and other than carfax God knows what was done. I want to save as much $$$ as possible but if I have to spend to get a full setup then I will.

Or is there another route I do not see?

G37Sam

Are you planning on boosting your car or keeping it naturally aspirated?

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2011 Nismo#91

What fool said that. No, if you only need to replace your transmission you do not need to replace your motor.

Tell that person you don't want to replace the motor because you heard new motors need new wheels because then they'd be too harsh on the tires.

Rusty

For moron who told you that a new tranny on an used motor would be harsh. I would be harsh on his head with a baseball bat.

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MAMotorsports

Yeah, new trans on old motor is just fine.



To answer your other question, aftermarket rods/pistons with stock crank is also just fine.

-Daelen

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YzGyz

This thread was funny.. no offense og poster. I meant the responses are funny..

YzGyz

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VSS370z

Tell him to shove the rods/pistons up his

BadChachi

Thats why I asked. It didn't seem right....Thanks guys

SouthArk370Z

Yes. Personally, I'd go ahead and upgrade the crank but there is no problem with mixing-and-matching. Just remember that a chain is only as strong as its weakest link.

Whoever this "someone" is, they don't know what they are talking about. The trans doesn't know how old the engine is - and wouldn't care if it did. All the trans cares about is how much power is being applied to the input shaft.

The engine and trans don't need to "correspond." As long as the trans bolts up properly and can handle the engine's power, you are good to go.

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taroslush

Having the cranked balanced to the new rods and pistons would be a good idea.

DIGItonium

How bad is your transmission? How's your clutch? Just wondering how long you can get by...

Also is the same person giving you advice working on your car as well? Haha

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BadChachi

Thanks for the clarification. It took a lot of stress off my mind. It was my brother in law who isn't into cars lol. I'm a noob as it is so it had me going. And Good to know but I'd probably want to get a new crank as well as upgrading the internals with the new transmission anyways. It's nice knowing that I dont have too tho. Thanks again guys. Other thanupgrading the clutch master cyl, slave and pedal is there any upgrades worth putting into a transmission? like racing gears or synchros?

BadChachi

Well the clutch is really bad. Super bad..Like you can feel it...I got an ATC clutch and pressure plate along with a new master and HD slave. I want to install now but waiting on my flywheel. Trying not to do any driving in the meantime but got to get to work.

My gears are sticky. typical 1st to sec sticky but I grind when I go in to 6th. I also think my synchros are going bad because when I down shift into 5th from 6th it grinds even with matching RPM's going into 5th. It may be the bad clutch too...

No way..I leave that to professionals. I am a noob and know very little. Only thing I did myself was the exhaust. anything else I'm letting the guys at TF works install.

BadChachi

I figured as much its nice knowing I dont have to though but honestly i'm OCD and anal about things. It will drive me crazy knowing my crank is balanced as far as durability goes... Thank you for your input. Reading can only get you so far.....

BadChachi

Brother in law lol. I haven't broke the news to him yet lol. Its gonna be funny showing him this haha