the gm 847 cam
...well...is it possible to pass emissions with this cam?
02-27-2004, 10:52 AM
#52
Registered User
Join Date: Aug 2001
Location: Cuyahoga Falls, OHIO
Posts: 870
The minute you pull up to the rollers to get E-checked, the techs are going to burst out in laughter.
Now this is true, there have been times when I've been sitting at a drivethrough window too long and the person in the car behind me had to put his window up. And my car idles right where it should, BLMs 128. Its very unlikely that you'll pass emmisions with this cam.
Now this is true, there have been times when I've been sitting at a drivethrough window too long and the person in the car behind me had to put his window up. And my car idles right where it should, BLMs 128. Its very unlikely that you'll pass emmisions with this cam.
02-27-2004, 11:09 AM
#54
Registered User
Join Date: Mar 2003
Posts: 653
Originally posted by Grease
The minute you pull up to the rollers to get E-checked, the techs are going to burst out in laughter.
Now this is true, there have been times when I've been sitting at a drivethrough window too long and the person in the car behind me had to put his window up. And my car idles right where it should, BLMs 128. Its very unlikely that you'll pass emmisions with this cam.
The minute you pull up to the rollers to get E-checked, the techs are going to burst out in laughter.
Now this is true, there have been times when I've been sitting at a drivethrough window too long and the person in the car behind me had to put his window up. And my car idles right where it should, BLMs 128. Its very unlikely that you'll pass emmisions with this cam.
...you can't idle in one spot for too long 
02-27-2004, 12:03 PM
#55
Registered User
Join Date: Apr 2001
Location: Springfield, IL
Posts: 2,195
Originally posted by LPE Z convt
And who are you? Screw equations my car made 363rwhp on a mustang dyno ... Screw dynojet#s, I don't even run that cam anymore so no 847 #s on a dynojet for me... I will have new Mustang dyno #s in the spring.....
And who are you? Screw equations my car made 363rwhp on a mustang dyno ... Screw dynojet#s, I don't even run that cam anymore so no 847 #s on a dynojet for me... I will have new Mustang dyno #s in the spring.....
i wasnt arguing one over the other! merely saying dont use equations to get dynojet #'s stick it on a dynojet to get dynojet #'s
anyway good luck with the new cam!
02-27-2004, 12:14 PM
#56
Registered User
Join Date: Feb 2001
Location: Cincinnati, Ohio
Posts: 3,068
My buddies car, ported lt4s, ported lt4 intake, 383, longtubes (FLP with cats, no egr or AIR) and the 847 passed easily here in ohio on the street tune (ie nothing changed). We have a roller test where they stuff the thingy up your tailpipes.
He tried to pass without cats, no chance.
Im going to have to get mine checked in September. Will switch to cats on mine too, but not sure how it will do with 33 less cubes.
He tried to pass without cats, no chance.
Im going to have to get mine checked in September. Will switch to cats on mine too, but not sure how it will do with 33 less cubes.
02-27-2004, 07:16 PM
#58
Registered User
Join Date: Apr 2003
Location: Land O Lakes, FL
Posts: 880
Originally posted by simple
yeah the GMPP rockers would be fine with it, just not the springs that come in that kit
i would think the CM612 springs would work with it also
yeah the GMPP rockers would be fine with it, just not the springs that come in that kit
i would think the CM612 springs would work with it also
03-01-2004, 10:55 AM
#59
Registered User
Join Date: Sep 2002
Location: Tallahassee, FL
Posts: 870
I've almost completed my 847 install. I went with the Crane 99873-16 springs, Comp Retainers, Seats and 10* locks. I also went to hardened pushrods, (couldn't afford the one-piece chrome moly version, would have got them if I could have), new Comp R lifters and I already have Comp Pro Magnum rockers.
The Crane springs fit fine, (real blast to put in btw), but you aren't going to get any more than about a 1.750 installed height unless you have your heads machined for a larger diameter spring. That puts you in the area of 165lbs seat and 407 open pressure. Probably not condusive to long term valve train wear.
How does the car run. Hopefully I'll let you know in a couple of days. I've got a Spohn TA going in as well, also did the true roller, electric water pump install and a few other upgrade items like poly motor and transmission mounts. I'm gonna need another tune and I'll be contacting my man Alvin at PCMForless just as soon as I can send him a datamaster file with this cam.
The Crane springs fit fine, (real blast to put in btw), but you aren't going to get any more than about a 1.750 installed height unless you have your heads machined for a larger diameter spring. That puts you in the area of 165lbs seat and 407 open pressure. Probably not condusive to long term valve train wear.
How does the car run. Hopefully I'll let you know in a couple of days. I've got a Spohn TA going in as well, also did the true roller, electric water pump install and a few other upgrade items like poly motor and transmission mounts. I'm gonna need another tune and I'll be contacting my man Alvin at PCMForless just as soon as I can send him a datamaster file with this cam.
03-08-2004, 01:15 PM
#60
Registered User
Join Date: Mar 2003
Posts: 653
Originally posted by 93ZM6Tally
I've almost completed my 847 install. I went with the Crane 99873-16 springs, Comp Retainers, Seats and 10* locks. I also went to hardened pushrods, (couldn't afford the one-piece chrome moly version, would have got them if I could have), new Comp R lifters and I already have Comp Pro Magnum rockers.
The Crane springs fit fine, (real blast to put in btw), but you aren't going to get any more than about a 1.750 installed height unless you have your heads machined for a larger diameter spring. That puts you in the area of 165lbs seat and 407 open pressure. Probably not condusive to long term valve train wear.
How does the car run. Hopefully I'll let you know in a couple of days. I've got a Spohn TA going in as well, also did the true roller, electric water pump install and a few other upgrade items like poly motor and transmission mounts. I'm gonna need another tune and I'll be contacting my man Alvin at PCMForless just as soon as I can send him a datamaster file with this cam.
I've almost completed my 847 install. I went with the Crane 99873-16 springs, Comp Retainers, Seats and 10* locks. I also went to hardened pushrods, (couldn't afford the one-piece chrome moly version, would have got them if I could have), new Comp R lifters and I already have Comp Pro Magnum rockers.
The Crane springs fit fine, (real blast to put in btw), but you aren't going to get any more than about a 1.750 installed height unless you have your heads machined for a larger diameter spring. That puts you in the area of 165lbs seat and 407 open pressure. Probably not condusive to long term valve train wear.
How does the car run. Hopefully I'll let you know in a couple of days. I've got a Spohn TA going in as well, also did the true roller, electric water pump install and a few other upgrade items like poly motor and transmission mounts. I'm gonna need another tune and I'll be contacting my man Alvin at PCMForless just as soon as I can send him a datamaster file with this cam.