Does anyone know where I can get some 9:1 forged pistons from. I have seen tons of 8:5 and 8:8 but Im wanting to get to a 9:1 as Im use to having the power of the 10:1 of my current engine and dont want to drop that far back. If I got 8:5 pistons could I take enough away from the head safley to raise it to the 9:1?

 

Give CP pistons a call, they will make them in any CR that you want.

 

Forged sells some:
https://my350z.com/forum/showpost.ph...55&postcount=6

 

I wondering if I got those Arias Pistons as they state to hold over 1,000 horsepower and raised the compession to about 9.3 by shaving the head down a little for about 550 horsepower. How do you think that would work?

 

buy the 9:1 ED arias and leave them alone and run them. Why do you want to move to 9.3:1? If it is because of throttle response, off boost power or to run less boost, the difference will not be measurable or noticable. You could even run 8.5:1 and you wouldn't feel a difference

 

+1
You will not feel a difference

 

+2

I have arias ED one of the best decisions ever

 

Hey guys Im shooting for about 550whp what do I need to do bearing wise! Im think im going with the 8:8 cp pistons and eagle rods but what about bearings and how do you think the apr 2000 rod bolts are going to do!

 

get the L19's...the best arp has out right now...as for the pistons/rods if u got the cash...go arias extreme duty pistons and pauter rods with race bearings...sharif@forged will hook u up!

 

There is absolutely no need for L19 rod bolts. The standard ARP 2000 ones will be plenty.

Go with eagle rods if you are watching your money. Pauters are nice, but kinda of a waste considering the power levels these engines are going to. You can do some nice Clevite or Cosworth bearings, or just let your machine shop source you out some. I let mine get me some and they have been awesome.

 

How about some ACL bearing has anyone here used them are they Good?

 

any bearings should be fine, just make sure you size them properly or you could be looking at another rebuild shortly. You can use OEM bearings, ACL, Cosworth, etc.

IMHO the pauters are beyond overkill. The eagles are strong rods and compared to others on the market are $1 store priced. Spend the extra money on the ED pistons. ARP 2000 head studs (only offered through GTM as far as I know) or ARP L19 will both be sufficient. You can torque the L19's slightly more than the ARP 2000. The 2000's usually tq to 79 lbs, but GTM says you can push them to 85 lbs. The L19's can be tq'd upwards of 95 lbs. I believe the oem head bolts are in the neighborhood of 65 lbs for reference.

One other thing to ensure is a good head gasket. Cosworth just recently released their new stopper style gasket similar to the HKS stopper style. I would recommend one of them, with the cosworth being over 100 bucks cheaper than the comparable HKS. These are the only two headgaskets I would consider

 

what is a good way to be sure i have the right size?

 

Your engine builder/machine shop will size them

 

Also if im wanting to buy piston that are .20 over they will be 95.5mm right?

 

Buy any of these combos/ Drop it off to your machinest & be done with it already
http://www.importperformanceparts.net/
95.5mm=std.
96mm=.20

 

The HKS kit is 9:1 CR

 

Cosworth bearings are made by ACL. It is stamped right on them.

 

race bearings=cosworth bearings...as for the pauter rods....i rather have a little overkill ...my .02

 

I can promise you the eagles are even overkill... and at about 1/2 the price of the pauters, are about the best bargain you will find