What kind of power would High compression pistons make on a stock Z?

I have heard almost none, I have heard close to 40

which is it?

and what litle gremlins will show themselves if high comp. pistons and forged connecting rods are installed?

thanks for the help!

 

...wow, almost 20 views now, does anyone actually have high compression pistons?

 

It depends how high you go,
stock: 10.3:1
if you go 11 or 11.5 I would guess you would get anywhere from 15 to 30 you will need headers, exhaust, higher rev, and cams to really get your gains

The problems I find:
If you go with pistons, you would be stupid not to go with other little goodies like cams valves port polish etc..which gets very expensive and then you need to decide if you would rather have F/I.

 

Goto honda tech to get info, they all build high compression built motors

 

well there are no high compression pistons yet... jsut the high compression nismo heads... they are 46cc...

they bump you up to 11.5:1

http://www.performancenissanparts.co...roducts_id=311

There is a full head kit available I need to post on our web site... it includes the new heads... VK45 Titanium Valves / high lift valve springs / Titanium Valve retainers / etc...

 

Esprit has high comp pistons. Or you saying readily available ones...

 

"High compression pistons" is kinda vague. You mean something like 11:1, 12:1, 13:1? The trick with higher compression pistons is that you can make more power, but you reach a limit much more quickly than with FI. If you have a goal of something like 300-320 WHP NA, then a higher CR + cams, headers, port and polish, exhaust, etc is possible. However, it's going to take a good bit of tuning and probably some high octance gasoline.

The above modifications to make lots of power result in a narrower powerband higher in the rev range, a lumpy idle, poor fuel economy, a much lower power limit, and the inability to add FI without removing all those parts installed.

 

Dude... there is TONS of companies out there offering high comp pistons.

Just because you guys don't sell it, doesn't mean its not available.

 

Weird

http://store.yahoo.com/sgpracing-sto...ra11fopis.html

 

you can always get high comp custom made. lots of companies dont just make a cookie cutter piston upgrade you tell them what you want and they make to order

 

Arias will make you any compression piston you ask for.

But back to the question....just curious why you spend thousands of dollars to tare down the motor to install high compression pistons and gain...at most...50whp?

Wouldnt it make better sense to go F/I, and maybe throw in low compression pistons for safety and reliability? Just a thought.

 

Hey. I will take 50. Lol. But on a serious note. Can we discuss ramifications of doing this. We can put these pistons in. But what about streetability. I would love to raise to 11.5. Hell. If I had a spare Z. It would have Nismo heads and these pistons. But there are factors such as pump gas vs race gas, how the ecu will act and low end performance

 

low end performance would be increased as would the entire power band. it would definitely need ecu tweaking of the timing and af curves. the fuel system should be adequate. my biggest question is would the stock ecu be able to adapt? or would it require a different comp.

 

Higher compression usually provides more hp BUT,

1. You must have an intake, fuel, and exhaust system that can handle the higher volumes.
2. You might blow head gaskets.
3. Your valve train might need upgrading.
4. You might need a higher grade or octane fuel.
5. It shortens the life of your engine.

I went this route on a Mustang. I went from 8.5 to 12.5. With headers, new intake, and carb, the increase in power was incredible....but I had to run Sunoco 96 octane or it would knock like crazy.

 

To piece this thing together. Z1 performance has Nismo Metal headgaskets. SGP and Z1 have pistons and rods(might as well do that while you are in there). Z1 and Performance Nissan has high strength connecting rod bolts. Its that damn ECU that has us. Has technosquare done enough tunning of the ECU to allow for all of this.

PS for you GA Z owners. Sunco has a gas station at Road Atlanta. And I think in Macon Ga.

 

Try and Call JASON @ MRCmotorsports for the ECU problem i know he is working with the PowerPerfect Ecu which has been working out really well for him!!!

WWW.RACEMRC.COM

Tell him Erich TOLD YOU TO CALL!!!

 

ohohohoho, I do not want to get high compression pistons, I have a stillen stage 3 supercharger, my engine would be completely blotto after that.

I was also wondering about nismo gaskets, heads, and some high compression pistons, along with nismo cams and crankshapft.

seems to me there is a lot of N/A performance that can be had in the Zeddy

could the nismo heads handle the power any better than the stockers?

 

bump

 

OK, now I am confused. Do you currently have the Stillen SC on your car? If so..the last thing you wanna do is increase compression. You want to REDUCE compression so you have boost more safely, with less chances of detonation.

If not, this again begs the question, why would someone spend many thousands of dollars to flow and mod the heads, and install high comp pistons for a relatively smalll HP gain? Just go F/I and low comp pistons...and see 500-600whp.

Please clarify.

 

has no one gone with the high compression route yet?