1jz bottom end

[mk3_chris]

realistically how far have the stock 1jz bottom ends been pushed as far as hp #s

 

[annoyingrob]

Think of a 2JZ bottom end, then think of it being stronger due to reduced rod length.

There are several people making upwards of 700whp on stock bottom ends, just not necessarily on this forum.

 

[mk3_chris]

Think of a 2JZ bottom end, then think of it being stronger due to reduced rod length.

There are several people making upwards of 700whp on stock bottom ends, just not necessarily on this forum.

Ok i wasn't sure, I'm supposed to be picking one up in the next week or so and i have a turbo in mind for it but didn't know how strong the bottom end was. But thank you :]

 

[10secdream]

I guess my only advice is if you are looking to put down that kind of HP make sure to check bearing clearances.

 

[mk3_chris]

I guess my only advice is if you are looking to put down that kind of HP make sure to check bearing clearances.

I've got a set of cams and a turbo set up in mind that would make plenty of power. I just wanted to make sure i wouldn't pop the bottom end

 

[DefiantWs6]

what do you mean by bearing clearence? sorry for my ignorance but I'm new to these motors im used to pushrod engines, is it similar to piston to valve clearence or completely different? What can you do about any issues should they come up?

 

[pbasil1]

what do you mean by bearing clearence? sorry for my ignorance but I'm new to these motors im used to pushrod engines, is it similar to piston to valve clearence or completely different? What can you do about any issues should they come up?

He means to check and make sure that the crankshaft, and connecting rod bearings are still within spec. If they are worn heavily then it will cause more vibration and somewhat an elliptical motion on the crank, which will stress the crank, bearings and rods to the point of breaking.


If i were you before building up the top end, invest in some new bearings and get the crank turned just as a preventative maintenance measure.

 

[DefiantWs6]

appreciate it, figured thats what you meant but I'd never heard it put that way, everytime ive been into a motor in any serious manner Ive upgraded the rod bolts and replaced the bearings, correct me if I'm wrong but this would benefit the same would it not? I appreciate the patience and the info

 

[mk3_chris]

Well the plan was to put rod bolts in it and replace the bearings when the engine gets put in the car

 

[10secdream]

ARP rod bolts and new bearings should do the trick just fine! I would still take a look at the crank and see what sort of condition it is in. If it was me and I would just put a 2JZ bottom end if you are going for big power.

 

[mk3_chris]

ARP rod bolts and new bearings should do the trick just fine! I would still take a look at the crank and see what sort of condition it is in. If it was me and I would just put a 2JZ bottom end if you are going for big power.

honestly thats the plan eventually