Turbo engine build, and parts - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

No Limit Motorsport · 11-20-2012, 10:21 PM

Just got a set of these new CP pistons in for a customer. They are 9:1 compression and look pretty sweet. I am so used to selling 99.5/100mm STI pistons its weird to see this small 86mm. We also have some Carrillo rods on order for it which will be here soon and I will post pictures. Combined with the slightly thicker HKS gasket compression should be 8.9:1, which should allow the motor to take a fair amount of boost.

HKS headgaskets

HKS spark plugs

Pauter connecting rods

dorifuto · 11-20-2012, 10:48 PM

That ringland looks stout.

JoeBoxer · 11-20-2012, 10:51 PM

Can't wait to see how it turns out, what turbo are you putting on there?

cruzinbill · 11-21-2012, 04:18 AM

with a CR of 8.9:1 you should be able to run like 45lbs of boost lol since stock 20lbs appears to be fine.

adamls2 · 11-21-2012, 04:44 AM

Awesome!

Calum · 11-21-2012, 05:42 AM

Quote:

Originally Posted by cruzinbill

with a CR of 8.9:1 you should be able to run like 45lbs of boost lol since stock 20lbs appears to be fine.

kinda where I'm at to. I'm getting the impression that in order to take advantage of such a drop in compression, with these combustion chambers, you'd probably want to be running hardblok aswell.

I can't wait to see the results of where this build is going though, should be stunning.

benster · 11-21-2012, 09:34 AM

even with an open deck, if you add aftermarket sleeves you'll increase the rigidity of the block by a big margin. but I'm with you on the fact that dropping 3.5 points in compression is huger, I'm sure going down to 10, 10.5 would've been more than enough.

Jeff86 · 11-21-2012, 10:21 AM

Wow that's low compression. Definitely in for results. This going to be a drag car mainly?

Hal@Dynosty · 11-21-2012, 11:02 AM

Saw these at SEMA - they looked great!

No Limit Motorsport · 11-21-2012, 12:06 PM

Quote:

Originally Posted by Jeff86

Wow that's low compression. Definitely in for results. This going to be a drag car mainly?

Its a street car. It really isn't low compression at all, these cars just come abnormally high. It is perfect turbo engine compression for pump fuel.

Most WRX/STI guys run 8.2-8.5:1 compression.

Jeff86 · 11-21-2012, 12:50 PM

Quote:

Originally Posted by No Limit Motorsport

Its a street car. It really isn't low compression at all, these cars just come abnormally high. It is perfect turbo engine compression for pump fuel.

Most WRX/STI guys run 8.2-8.5:1 compression.

Ah... I didn't actually know what was normal for STIs. Coming from the K series most of us were dropping from 11:1 or 11.5:1 to around 10:1.

Tansey86 · 11-21-2012, 01:37 PM

With FI I would go with around 10:1, more response and power. If it wasnt DI I could see why going down so low.

benster · 11-21-2012, 03:50 PM

the reason I said it was very low is for DI. will it still be enough for it to work properly or it doesn't matter as it isn't compression ignited like diesels, since you can actually have gas auto ignite(hence detonation)?

Calum · 11-21-2012, 04:58 PM

Quote:

Originally Posted by benster

the reason I said it was very low is for DI. will it still be enough for it to work properly or it doesn't matter as it isn't compression ignited like diesels, since you can actually have gas auto ignite(hence detonation)?

DI doesn't mean compression ignition. It's still a gas engine with spark plugs. It'll certainly still work. :happy0180:

11-20-2012, 10:21 PM	#1
No Limit Motorsport Senior Member Join Date: Jul 2012 Drives: 2013 DGM BRZ Location: Long Island, NY Posts: 2,266 Thanks: 355 Thanked 406 Times in 228 Posts Mentioned: 27 Post(s) Tagged: 0 Thread(s)	Turbo engine build, and parts Just got a set of these new CP pistons in for a customer. They are 9:1 compression and look pretty sweet. I am so used to selling 99.5/100mm STI pistons its weird to see this small 86mm. We also have some Carrillo rods on order for it which will be here soon and I will post pictures. Combined with the slightly thicker HKS gasket compression should be 8.9:1, which should allow the motor to take a fair amount of boost. HKS headgaskets HKS spark plugs Pauter connecting rods Last edited by No Limit Motorsport; 12-12-2012 at 08:42 AM.

11-21-2012, 04:44 AM	#5
adamls2 Member Join Date: May 2012 Drives: LS460 Location: United States Posts: 25 Thanks: 28 Thanked 5 Times in 4 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Awesome! __________________ ~~adamls2~~ ~~Injection is nice but I'd rather be blown~~

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
AVO turbo kit for BRZ - initial build thread	AVOturboworld	Forced Induction	3109	12-01-2019 03:55 PM
Stop Motion Engine Build	Mishimoto	Other Vehicles & General Automotive Discussions	0	08-06-2012 04:25 PM
Compression ratio 12.5:1. Bye-bye Super charger & Turbo build?	fred_boosted	Engine, Exhaust, Transmission	215	12-12-2011 07:23 PM
Engine build	Maxim	Engine, Exhaust, Transmission	41	10-03-2011 09:22 PM

11-20-2012, 10:48 PM	#2
dorifuto If in doubt,flat out Join Date: Oct 2012 Drives: 2013 brz Location: colorado Posts: 260 Thanks: 56 Thanked 211 Times in 75 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	That ringland looks stout.

11-20-2012, 10:51 PM	#3
JoeBoxer Senior Member Join Date: Jul 2012 Drives: Whiteout FR-S Location: Arkansas Posts: 4,154 Thanks: 1,666 Thanked 1,627 Times in 997 Posts Mentioned: 72 Post(s) Tagged: 0 Thread(s)	Can't wait to see how it turns out, what turbo are you putting on there?

11-21-2012, 09:34 AM	#7
benster Member Join Date: Oct 2012 Drives: none yet Location: Belleville, ON Canada Posts: 52 Thanks: 3 Thanked 8 Times in 8 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	even with an open deck, if you add aftermarket sleeves you'll increase the rigidity of the block by a big margin. but I'm with you on the fact that dropping 3.5 points in compression is huger, I'm sure going down to 10, 10.5 would've been more than enough.

11-21-2012, 10:21 AM	#8
Jeff86 Senior Member Join Date: Jul 2012 Drives: 86 (FR-S) Location: Tennessee Posts: 643 Thanks: 460 Thanked 214 Times in 148 Posts Mentioned: 5 Post(s) Tagged: 0 Thread(s)	Wow that's low compression. Definitely in for results. This going to be a drag car mainly?

11-21-2012, 11:02 AM	#9
Hal@Dynosty Member Join Date: Jun 2012 Drives: 2013 Scion FR-S Location: Louisville, KY Posts: 48 Thanks: 0 Thanked 140 Times in 22 Posts Mentioned: 15 Post(s) Tagged: 0 Thread(s)	Saw these at SEMA - they looked great!

11-21-2012, 01:37 PM	#12
Tansey86 Senior Member Join Date: Sep 2012 Drives: 2003 Subaru Outback Location: Long Island, NY Posts: 1,318 Thanks: 154 Thanked 528 Times in 300 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	With FI I would go with around 10:1, more response and power. If it wasnt DI I could see why going down so low.

11-21-2012, 03:50 PM	#13
benster Member Join Date: Oct 2012 Drives: none yet Location: Belleville, ON Canada Posts: 52 Thanks: 3 Thanked 8 Times in 8 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	the reason I said it was very low is for DI. will it still be enough for it to work properly or it doesn't matter as it isn't compression ignited like diesels, since you can actually have gas auto ignite(hence detonation)?

User Name		Remember Me?
Password