Schrick camshafts passing Cali smog? - Page 2

=======Live Fast! · 03-26-2012, 11:29 PM

Again...not concerned with the visual inspection just smog...anyone passing SMOG with the 288?

=======Live Fast! · 03-27-2012, 02:06 PM

Well went ahead and got the 284...port and polishing everything too. This thing should be pretty tits when I get it back!

Cabriolet · 03-27-2012, 02:29 PM

Quote:

Originally Posted by =======Live Fast!

Well went ahead and got the 284...port and polishing everything too. This thing should be pretty tits when I get it back!

that will pass smog if your cat is very good. make sure no air leaks and good O2 also.

=======Live Fast! · 03-31-2012, 12:40 AM

Man this thing pulls in the high end! I definitely sacrificed some low end with the 284.

nando · 03-31-2012, 06:45 AM

if your m20 is otherwise stock - you need a higher HR to really take advantage of that cam. that's part of why you lost some bottom end, the dynamic CR with 8:8:1 is too low.

=======Live Fast! · 03-31-2012, 04:05 PM

Quote:

Originally Posted by nando

if your m20 is otherwise stock - you need a higher HR to really take advantage of that cam. that's part of why you lost some bottom end, the dynamic CR with 8:8:1 is too low.

HR? Explain please?

camshaftgsxr · 03-31-2012, 04:15 PM

Quote:

Originally Posted by =======Live Fast!

HR? Explain please?

i think he means CR as in compression ratio, probably a simple keyboard error.

=======Live Fast! · 03-31-2012, 04:41 PM

So were talking shaving the head and block to up the ratio? Again forgive my ignorance, but how do you boost the compression ratio in these things?

nando · 03-31-2012, 05:48 PM

Quote:

Originally Posted by camshaftgsxr

i think he means CR as in compression ratio, probably a simple keyboard error.

Lol, typing on a slow smartphone sucks

nando · 03-31-2012, 05:50 PM

Quote:

Originally Posted by =======Live Fast!

So were talking shaving the head and block to up the ratio? Again forgive my ignorance, but how do you boost the compression ratio in these things?

You need new pistons, shaving the head and block introduce other consequences that arent desireable.

bowtie2bimmer · 03-31-2012, 05:56 PM

I love Florida... no inspections

camshaftgsxr · 04-01-2012, 02:42 PM

Quote:

Originally Posted by nando

You need new pistons, shaving the head and block introduce other consequences that arent desireable.

what other consequences?

=======Live Fast! · 04-01-2012, 03:38 PM

Quote:

Originally Posted by camshaftgsxr

what other consequences?

Yea. Im curious as well. I know plenty of folks that race in Spec E30 that take the head and block down to the absolute minimum required in the rules. I havent heard about any problems theyve had as a result of it...

der affe · 04-01-2012, 03:55 PM

Timing changes

Wild Ride · 04-01-2012, 08:58 PM

I have gone down this road over the past two years:

Im at 10.2:1 with a decked head and a 288 and a 2.7l diesel crank b27 rods and b25 pistons double overbore. As long as you don't have headers and intake you will pass the visual. The distance between the cam and crank timing gears will change when you take material off the head. You will need an adjustable timing gear to fix your timing or the car will run like s**t. You will absolutely need a very good tune that is optimized for your setup like a miller war chip megasquirt etc. Don't adjust your fueling with a adjustable fuel pressure regulator it is just a band aid for a proper tune. A good tune optimized for your setup coupled with a good cat will pass smog. It will idle very lopey at 1100 rpm which will spook many smog guys so make sure yours is very lax or ignorant.

All together you are looking at 2k plus to create a perfect setup between cam, injectors, tuning, cam gear, wideband, machine work etc.

03-26-2012, 11:29 PM	#16
=======Live Fast! Advanced Member Join Date: Nov 2011 Location: San Francisco Posts: 161	Again...not concerned with the visual inspection just smog...anyone passing SMOG with the 288? __________________ 2000 323ci 1987 325is super etta 1988 M5 2000 M5 1989 944 turbo 1989 325is

03-27-2012, 02:06 PM	#17
=======Live Fast! Advanced Member Join Date: Nov 2011 Location: San Francisco Posts: 161	Well went ahead and got the 284...port and polishing everything too. This thing should be pretty tits when I get it back! __________________ 2000 323ci 1987 325is super etta 1988 M5 2000 M5 1989 944 turbo 1989 325is

03-31-2012, 12:40 AM	#19
=======Live Fast! Advanced Member Join Date: Nov 2011 Location: San Francisco Posts: 161	Man this thing pulls in the high end! I definitely sacrificed some low end with the 284. __________________ 2000 323ci 1987 325is super etta 1988 M5 2000 M5 1989 944 turbo 1989 325is

03-31-2012, 06:45 AM	#20
nando Moderator Join Date: Nov 2003 Location: bellingham, wa Posts: 25,593 Images: 2	if your m20 is otherwise stock - you need a higher HR to really take advantage of that cam. that's part of why you lost some bottom end, the dynamic CR with 8:8:1 is too low. __________________ Build thread R3v helped me raise $3000 for cancer research

03-31-2012, 04:41 PM	#23
=======Live Fast! Advanced Member Join Date: Nov 2011 Location: San Francisco Posts: 161	So were talking shaving the head and block to up the ratio? Again forgive my ignorance, but how do you boost the compression ratio in these things? __________________ 2000 323ci 1987 325is super etta 1988 M5 2000 M5 1989 944 turbo 1989 325is

03-31-2012, 05:56 PM	#26
bowtie2bimmer E30 Addict Join Date: Jan 2012 Location: Saint Johns, Fl Posts: 595	I love Florida... no inspections __________________ 1987 BMW 325ic - Emma

04-01-2012, 03:55 PM	#29
der affe Moderator Technical Join Date: Dec 2005 Location: scottsdale, az Posts: 8,191	Timing changes __________________ seien Sie größer, als Sie erscheinen

04-01-2012, 08:58 PM	#30
Wild Ride E30 Addict Join Date: Apr 2008 Location: San Diego, CA Posts: 557	I have gone down this road over the past two years: Im at 10.2:1 with a decked head and a 288 and a 2.7l diesel crank b27 rods and b25 pistons double overbore. As long as you don't have headers and intake you will pass the visual. The distance between the cam and crank timing gears will change when you take material off the head. You will need an adjustable timing gear to fix your timing or the car will run like s**t. You will absolutely need a very good tune that is optimized for your setup like a miller war chip megasquirt etc. Don't adjust your fueling with a adjustable fuel pressure regulator it is just a band aid for a proper tune. A good tune optimized for your setup coupled with a good cat will pass smog. It will idle very lopey at 1100 rpm which will spook many smog guys so make sure yours is very lax or ignorant. All together you are looking at 2k plus to create a perfect setup between cam, injectors, tuning, cam gear, wideband, machine work etc.