DONT

USE

CTR PISTONS

This does not include B16's b16b's or LSVTECs.

GSRRRRRRRRRRRRRRRRRRRRRRRRRRRR

Because ignorant people dont understand.


That is all.

 

haha

 

lol, you know some noobs wont listen

 

WHAT?! WHY?! Anything stamped type r must be good

PS I was hoping for a sweet piston and valve collision

 

My buddy has an lsv with ctr pistons on pump, i wonder how long thatll last.

 

23.65 seconds. Approximately

 

in my noob days, we bumped up the fuel pressure and retarded the dizzy. god knows what "basemap" he had, but it didn't blow. dont know what happened to it after he sold it, most likely it blew lol

 

Why not? :p

 

So this was last week ?

 

No, i feel the need to say this because CTR pistons belong in "1" motor. Thats it...

I have a friend who obivously fed the wrong information and now he's going to have compression through the roof and possible p2v problems on anything bigger then a tuner2cam.. I feel like this needs to be reiterated daily.

I dont care what you read.. or who's friend of this friend has what.. i'm telling you RIGHT NOW, CTR Pistons in a GSR rebuild are FAIL. CTR pistons in a GSR with a LS = BIGGER FAIL.

 

idk its been running for a couple days now, idk why he put those things in em the old motor blew cause of the ctr pistons.

 

definitely wasn't lol i dont even think i'll use ctr pistons in a b16

 

Notice the majority of the people that are looking at this thread are the people that already know this

And every other idiot will go right by it to the "new post" button and ask can you hold this while I ****...

 

I'll be honest.....i've done this combo a ton of times and have never had an issue. All oem bottom ends(all Honda bottom), portflow pr3 heads on jun 3's.....220whp+(dynojet) on pump for years. Daily driven, HPDE driven, all year round. Multiple setups......multiple times, even with p72 heads. I've always been told not to do it, but have had success with it.

 

Using a b16 head helps.. but not so much. This is a general comment of information because the fact remains. Not everyone on this board, is a tuner. Not everyone has the building experience of You, Me, or anything else who's very well repected on here.

the fact remain.

With a GSR block, Rod, crank and CTR pistons the overall compresion with a b16a head is around 12.7. This is pretty much a receipt for disaster if it isn't tuned and dialed in correctly, not to mention pro2's would probably smack the crap outta the piston in vtec, and if not, it'd be very close..

People have used this combo with success, nobody's denying it, but for the amature builder or tuner, people should stay clear. This comment isn't directed towards anyone, but i have a friend who's in a corner now because he went with misinformation. I also have a customer who wants to buy a set of "MY" Custom cams for his motor, but i refuse to do so, because the motor is already together and he wants one of my bigger custom cams and i wont supply him because i know it'll smack his pistons.. because why?

He's using a GSR block with a LS crank/rods and a b16 head with CTR pistons. CR is already way out of range, like 13.3 CR from my measurements..not to mention the pistons are probably 0.00000013 inches from touching the head..


Its just dumb and i dont want to see anyone else destory a motor because of this shitty *** , bunk *** pistons.

 

since majority of the noobs think that super high compression on pump gas is the way to go for more whp, they go by that and since honda makes a cast piston which is cheaper than forged, with a huge teepee dome on it, they see no reason why they shouldn't go with it, smh.

i find it funny when people try to convince me how good they are just because honda haves them in their b16b motor. they can either learn from the pro's, or learn the hard way and blow motors.

 

Ive ALWAYS said LSvtec+CTR pistons were a no no and I've seen one with major p2v contact and that ended ugly. But my friend(and I really have a friend) has a gsr motor, CTR pistons, b16 head, skunk2 tuner3s, XS power tri-y(lmao, it works and still holdin up) blah, blah, blah.. and it runs fine. In a full interior EK hatchback, it runs consistant mid13s with a possible low13s in there somewhere. Anyways, Almost 5000miles total with daily driving and commuting about 70miles from his hometown to mine. Car was tuned by Parris engine dynamics and made 206whp. Very healthy, strong setup, but ugly powerband with the tuner3s. Nice setup, but There are other ways to make this kinda power and not risk breaking everything.

Just thought I'd add my .02

 

lol @ "i actually have a friend"

Input is always nice.. again.. was tuned correctly by a well known person. This is for off the street wannabe's.. Dont want vin diesel beating y0 ***.

 

Hahahahaha

 

While I'm not generally a fan of using those pistons in a 1.8L build, the problems mostly happen when running the LS crank with a GSR head. Tuning can be a problem for any build and is always more critical in a higher compression build.

 

Definitely one of the best posts in this thread IMO.


Before i get people calling me and saying they dont want CTR pistons because of what people post on H-T....how about we look at some basics here?

How many people here have actually installed these in a gsr block(87mm crank setup) and have clayed/degreed some of the cams on the market against the reliefs for clearance?

I've done Jun 3's, and pro 2's. Those are pretty big cams. I had good clearance...never had an issue, it wasnt too bad for clearances even after degreeing. I just stayed conservative on cam gear settings/clearances.

Is the compression too high for pump gas? How many people here have used these pistons on pump gas and drove around without exploding their engines immediately?

On 93....i've done it plenty of times. Im not saying its the most ideal thing, but it works. And i havent had issues with it. This setup on e85 creates quite the beast on a budget for being a small 1.8. I wouldnt see doing this on anything lower than 93 octane working too well, yet i've talked to some guys on the west coast who have done it on 91.

And all this talk about the flame travel, yeah i get it. You'll never acheive a good amount of compression out of a 81mm bore without having a small mountain in the way. Ever look at or build an 81mm high comp engine using either CP or Arias pistons? Holy crap of a dome for only 12-12.5:1 compression!! Ok, so flame travel, piston speed, airflow energy..etc.etc...again its not the best thing when using a CTR piston....but what happens when someone does this to their piston?



Does it help out? I'm not sure because i do this to all the CTR pistons i put together. All i know is that i havent had problems with these 81X87 combos.....and i'd hate to discourage any noobs who are mechanically and technically inclined to steer away from trying something that might work for them.....just because what they saw on the internet.

 

Thats the best idea.. shaving down the dome like that, i've had ideas of doing this,but have never had a chance to test the shaving down a bit.. you've probably fixed the flame travel idea..and also clearence issuses with a gsr head..

 

All he did in that picture was smooth the sharp edges on the dome part of the pistons. Flame travel would still be somewhat affected since he didn't significantly change the shape or size of the bumps. Clearance would still be an issue with a GSR head IF using an LS crank.

What Mikey is saying is that you can still do a decent build with those pistons and have good results but you should do your homework first. That's where most people go wrong.

 

You get it...thanks.

 

ive seen people with this build many times...and me and my friends always played a guessing game...how long will it last this time...? ive seen it last a day and up to 3 months with chipped ecu....so a tune setup should be alright...