Engine problem
Burning Brakes
Joined: Jan 2005
Posts: 1,032
Likes: 0
From: Phoenix, AZ
Ok so here is the link to the FVD cams for a 3.4 996.
http://www.fvd.de/us/en/Porsche-0/-/...pc-Set%29.html
I'm thinking only $2,779.11 plus shipping, another couple of grand for the install (unless I do it myself), then a reflash for $1,000+ and I can have a car that runs crappy. Hummmm! Tempting
http://www.fvd.de/us/en/Porsche-0/-/...pc-Set%29.html
I'm thinking only $2,779.11 plus shipping, another couple of grand for the install (unless I do it myself), then a reflash for $1,000+ and I can have a car that runs crappy. Hummmm! Tempting
Three Wheelin'
Joined: May 2010
Posts: 1,851
Likes: 9
From: Nor Cal
Jake sells performance cams as well according to his site:
http://www.flat6innovations.com/shop/home.php?cat=321
http://www.flat6innovations.com/shop/home.php?cat=321
Drifting
Joined: Dec 2009
Posts: 2,919
Likes: 3
From: Aiea, HI
Not being an expert with the durametric, see if you can diagnose valve performance. Fresh ground cams like performance cams have to be broken in with something like 5 minutes of rpm's above 3,000 with the cam lube on the bearing surfaces of the cam especially the lobes that need breaking in. In other words if the guy doing the cam swap didn't know the proper cam break in there is a chance the cam has a flattened lobe which screws performance. Whatever reading bad lobes might give for this cars ECU it might cause the throttle to cut back. I also figure the cam swap package included new lifters instead of putting old lifters in contact with a new cam lobe to screw up?
The higher rpms break in for a cam is from the get go on the first firing up. Working with chevy engines it could be just a couple minutes of low rpm wasting a cam not doing the straight to higher rpms on the first start. The engine has to be left in the higher rpms for a good length of time.
The higher rpms break in for a cam is from the get go on the first firing up. Working with chevy engines it could be just a couple minutes of low rpm wasting a cam not doing the straight to higher rpms on the first start. The engine has to be left in the higher rpms for a good length of time.
Former Vendor
Joined: Nov 2010
Posts: 6,968
Likes: 2,341
From: Cleveland Georgia
Not being an expert with the durametric, see if you can diagnose valve performance. Fresh ground cams like performance cams have to be broken in with something like 5 minutes of rpm's above 3,000 with the cam lube on the bearing surfaces of the cam especially the lobes that need breaking in. In other words if the guy doing the cam swap didn't know the proper cam break in there is a chance the cam has a flattened lobe which screws performance. Whatever reading bad lobes might give for this cars ECU it might cause the throttle to cut back. I also figure the cam swap package included new lifters instead of putting old lifters in contact with a new cam lobe to screw up?
The higher rpms break in for a cam is from the get go on the first firing up. Working with chevy engines it could be just a couple minutes of low rpm wasting a cam not doing the straight to higher rpms on the first start. The engine has to be left in the higher rpms for a good length of time.
The higher rpms break in for a cam is from the get go on the first firing up. Working with chevy engines it could be just a couple minutes of low rpm wasting a cam not doing the straight to higher rpms on the first start. The engine has to be left in the higher rpms for a good length of time.
When replacing camshafts the lifters must be replaced, hopefully with units that are ground to meet the lobe taper thats being utilized. The opther dynamic that must be considered is force thats being exerted on the lifter carrier that is higher than previously with a stock ramp speed from a stock camshaft profile. This vastly changes the surface speed of the lifter.
Changing camshafts isn't a simple enhancement when done thoroughly.
