Honda and Acura Model Specific Forums

bmwe362006 · 11-05-2009, 07:53 PM

I am running a gsr block b16 head. I rebuilt the bottom end and installed ctr pistons. i have driven it about 150 miles. I got on it once and it felt considerably slower then before. (stock bottom end with worn rings). i havent done a compression test yet but will the motor slowly get stronger through the break in process?

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TunerN00b · 11-05-2009, 07:57 PM

If you already drove it 150 miles, the "break in" period is done.

So, you increased the compression, didn't get the car tuned for the change, yet wonder why it feels slower...

Get the car on a dyno, get it tuned, and find out exactly what it is making. The butt dyno is a very insensitive tool at best, and a complete liar at worst.

bmwe362006 · 11-05-2009, 08:02 PM

well at the same time i was getting on it so was my buddy in his si. lol. Before i rebuilt it the motor smoked horribly but i would still beat him by about a car and a half. Now he beat me by about two cars. I raised the compression and got much slower.....

SergEK · 11-05-2009, 08:10 PM

Quote:

Originally Posted by bmwe362006

well at the same time i was getting on it so was my buddy in his si. lol. Before i rebuilt it the motor smoked horribly but i would still beat him by about a car and a half. Now he beat me by about two cars. I raised the compression and got much slower.....

Its like 1995 all over again...

Get to a dyno and get a tune PLEASE for the sake of the motor

Keep in mind your timing maps may have to be adjusted for the compression you are running, as well as your fuel requirements.

ILS_09 · 11-05-2009, 09:06 PM

all you need is just a tune

-PaulMc- · 11-05-2009, 09:07 PM

You need a tune, simple as that. That's why your piston upgrade doesn't feel effective the way it should be.

SpEeDyX · 11-05-2009, 09:23 PM

I dont understand how someone can rebuild that motor and raise the compression and not know enough they need a tune. Also ctr pistons were a bad choice you should of just gone with jdm itr pistons.

bmwe362006 · 11-05-2009, 11:22 PM

i know it isnt tuned but my buddy had the smae setup awhile ago and his car would run really well

weavertime1 · 11-06-2009, 05:53 AM

Quote:

Originally Posted by bmwe362006

i know it isnt tuned but my buddy had the smae setup awhile ago and his car would run really well

...it shouldn't have without proper tuning.

A.R · 11-06-2009, 05:54 AM

Quote:

Originally Posted by SpEeDyX

I dont understand how someone can rebuild that motor and raise the compression and not know enough they need a tune. Also ctr pistons were a bad choice you should of just gone with jdm itr pistons.

i agree wit yall he needs a tune.

Why were the CTR pistons a bad choice???

SpEeDyX · 11-06-2009, 08:13 AM

Quote:

Originally Posted by A.R

i agree wit yall he needs a tune.

Why were the CTR pistons a bad choice???

He made this post also in the all motor thread (which he should of done so to begin with) and ALLMOTOR says it best

Quote:

Originally Posted by ALL M0T0R

are you stupid?

12.7 isn't high?

Considering 12.5 is pushing the limits of pump gas, unless your tuned, your really in another world..

I run 12.8CR on mine, but my car, is tuned, very well, at full and partial throttle..

one lean spot, could melt a piston specially CTR's which are garbage in the first place.
Why would you rebuild?? With ctrs.. that piston is entirely too heavy, and no tot mention it distorts the flame front and it doesn't allow for proper combustion..
i wish people would read, ctr pistons aren't good.

SpEeDyX · 11-06-2009, 08:25 AM

Also hear is a picture i found that shows the difference in a b16 and gsr head that shows what makes it bad for p2v clearance

B16 /GSR

Valve clearance is another concern but this is what you need to check for, especially if the block & or head has been machined.

bmwe362006 · 11-06-2009, 08:29 PM

I did a compression test today. it was at about 180 miles. it was 175 185 175 175. ive had different explanations most saying that it will slowly gain compression as you drive it and a few others said the rings should of already seated and something is wrong. The rings were put on correctly. I'm hoping it will slowly get better.

Spawne32 · 11-06-2009, 09:04 PM

your just completely ignoring everything everyone is saying arent you

FRESHTEG · 11-06-2009, 09:16 PM

Quote:

Originally Posted by Spawne32

your just completely ignoring everything everyone is saying arent you

tune

GagnarTheUnruly · 11-06-2009, 09:43 PM

Quote:

Originally Posted by Spawne32

your just completely ignoring everything everyone is saying arent you

Here and in his post in the all motor forum as well...

wunfstgsr · 11-06-2009, 09:51 PM

It will never run properlly untill you tune the motor! and running it hard in vtec is ruining the motor! those pistons give a shit load of compression and makes piston to valve clearence real close! thats why jdm itr pistons work better! you need to get your ecu chipped to tune the motor period! what are the rest of your mods?

josh-roy · 11-06-2009, 10:09 PM

TUNE.

Honda_ThuGZ · 11-07-2009, 01:30 AM

Quote:

Originally Posted by josh-roy

TUNE.

x1500

Tegraracer90 · 11-07-2009, 05:07 AM

if your not gonna take ANYONES advise...dont come on here

a motor is not like a growing baby as to were it gets stronger as it gets older...after the break in...were you sit...is basically were u sit

MilanoRedDashR · 11-07-2009, 12:34 PM

lol moron

idrivesideways · 11-07-2009, 03:11 PM

if you don't tune this soon it won't be alive long enough to complain about

timing and a/f NEED to be adjusted. there is a good chance with this much compression the stock map will have too much timing and god knows where the AF is. burned valves and melted pistons happen when you do crap like this.

bmwe362006 · 11-07-2009, 03:20 PM

Quote:

Originally Posted by Tegraracer90

if your not gonna take ANYONES advise...dont come on here

a motor is not like a growing baby as to were it gets stronger as it gets older...after the break in...were you sit...is basically were u sit

I am going to get it tuned very soon. I am aware it needs to be tuned. My question was why is the compression so low. Tuning will not affect the compression. Anyways i checked the compression today at about 350 miles and it came out 185 200 195 210.

maybe some of you guys are wrong......

SleeperGSR · 11-07-2009, 03:31 PM

Quote:

Originally Posted by bmwe362006

maybe some of you guys are wrong......

Great way to get help...good luck!

teg_racer · 11-07-2009, 03:42 PM

tune it. your gonna lean it out and your gonna burn it up

11-05-2009, 07:57 PM	#2
TunerN00b Member Join Date: Jun 2004 Location: Culver City, CA, United States Posts: 4,563	Re: gsr is slower after being rebuilt with ctr pistons If you already drove it 150 miles, the "break in" period is done. So, you increased the compression, didn't get the car tuned for the change, yet wonder why it feels slower... Get the car on a dyno, get it tuned, and find out exactly what it is making. The butt dyno is a very insensitive tool at best, and a complete liar at worst.

11-05-2009, 08:02 PM	#3
bmwe362006 Junior Member Join Date: Aug 2007 Posts: 140	Re: gsr is slower after being rebuilt with ctr pistons well at the same time i was getting on it so was my buddy in his si. lol. Before i rebuilt it the motor smoked horribly but i would still beat him by about a car and a half. Now he beat me by about two cars. I raised the compression and got much slower..... __________________ DC Squad Member #112 (V2)

11-05-2009, 09:06 PM	#5
ILS_09 Junior Member Join Date: Sep 2006 Location: Merced, Ca, Us Posts: 181	Re: gsr is slower after being rebuilt with ctr pistons all you need is just a tune

11-05-2009, 11:22 PM	#8
bmwe362006 Junior Member Join Date: Aug 2007 Posts: 140	Re: gsr is slower after being rebuilt with ctr pistons i know it isnt tuned but my buddy had the smae setup awhile ago and his car would run really well __________________ DC Squad Member #112 (V2)

11-06-2009, 08:29 PM	#13
bmwe362006 Junior Member Join Date: Aug 2007 Posts: 140	Re: gsr is slower after being rebuilt with ctr pistons I did a compression test today. it was at about 180 miles. it was 175 185 175 175. ive had different explanations most saying that it will slowly gain compression as you drive it and a few others said the rings should of already seated and something is wrong. The rings were put on correctly. I'm hoping it will slowly get better. __________________ DC Squad Member #112 (V2)

11-06-2009, 09:51 PM	#17
wunfstgsr Member Join Date: Nov 2007 Location: san diego, ca Posts: 1,931	Re: gsr is slower after being rebuilt with ctr pistons It will never run properlly untill you tune the motor! and running it hard in vtec is ruining the motor! those pistons give a shit load of compression and makes piston to valve clearence real close! thats why jdm itr pistons work better! you need to get your ecu chipped to tune the motor period! what are the rest of your mods?

11-06-2009, 10:09 PM	#18
josh-roy Junior Member Join Date: Mar 2009 Posts: 57	Re: gsr is slower after being rebuilt with ctr pistons TUNE. __________________ We cut the legs off of our pants...

11-07-2009, 05:07 AM	#20
Tegraracer90 Junior Member Join Date: Jan 2007 Posts: 357	Re: gsr is slower after being rebuilt with ctr pistons if your not gonna take ANYONES advise...dont come on here a motor is not like a growing baby as to were it gets stronger as it gets older...after the break in...were you sit...is basically were u sit __________________ Its either gonna go like Hell...or Blow up

11-07-2009, 12:34 PM	#21
MilanoRedDashR Junior Member Join Date: Jun 2009 Posts: 105	Re: gsr is slower after being rebuilt with ctr pistons lol moron __________________ 1995 GSR

11-07-2009, 03:11 PM	#22
idrivesideways Member Join Date: Aug 2007 Location: Sherwood, OR, usa Posts: 3,831	Re: gsr is slower after being rebuilt with ctr pistons if you don't tune this soon it won't be alive long enough to complain about timing and a/f NEED to be adjusted. there is a good chance with this much compression the stock map will have too much timing and god knows where the AF is. burned valves and melted pistons happen when you do crap like this. __________________ owner www.mountainviewcarpetcare.com steam carpet cleaning & grease removal for the home, office or car available in the portland - beaverton oregon area

11-07-2009, 03:42 PM	#25
teg_racer Junior Member Join Date: Jan 2007 Location: coeur d alene, id, us Posts: 469	Re: gsr is slower after being rebuilt with ctr pistons tune it. your gonna lean it out and your gonna burn it up __________________ 236whp 160ft lbs N/A b series. more power to come. vouches mouab18c1 98DC2R BrianSi91. http://hondamarketplace.com/showthread.php?t=2538671

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