Opinion on mild XFI cam and DCR
#1
![Question](https://ls1tech.com/forums/images/icons/icon5.gif)
Hi guys,
I plan to swap heads and cam soon and need a last opinion regarding my combo.
This is my plan.
Stock bore LS1
ported LS6 heads
Cometic .040 headgaskets
ported oil pump
LS6 intake manifold
ported TB
cam: 214/218 @.050 (.600/.605) LSA 112 straight up (XFI intake lobes)
PAC-1518 valve springs
SCR: 11.02
DCR: 8.6
Overlap @ .050: -8 deg
EFIlive tuning
Are my numbers correct?
I'm a little concerned about the high DCR. I specifically look for a low rpm/high torque cam since I spent 90% of my driving below 2000rpm. I'm not looking for high dyno numbers, but for area under the curve. (I'm not a big fan of high duration/high LSA cams)
I do have a vararam cold air intake that should help with the high DCR, but is this still driveable even when I must use bad gas (below 93 oct.)?
The car will still have stock exhaust manifolds for now, but I plan on changing to headers in the future.
I haven't ordered the cam yet, so please advise if you see any major flaws with my choice.
Has anyone experience with the pushrod length that is required for this cam?
Alex
I plan to swap heads and cam soon and need a last opinion regarding my combo.
This is my plan.
Stock bore LS1
ported LS6 heads
Cometic .040 headgaskets
ported oil pump
LS6 intake manifold
ported TB
cam: 214/218 @.050 (.600/.605) LSA 112 straight up (XFI intake lobes)
PAC-1518 valve springs
SCR: 11.02
DCR: 8.6
Overlap @ .050: -8 deg
EFIlive tuning
Are my numbers correct?
I'm a little concerned about the high DCR. I specifically look for a low rpm/high torque cam since I spent 90% of my driving below 2000rpm. I'm not looking for high dyno numbers, but for area under the curve. (I'm not a big fan of high duration/high LSA cams)
I do have a vararam cold air intake that should help with the high DCR, but is this still driveable even when I must use bad gas (below 93 oct.)?
The car will still have stock exhaust manifolds for now, but I plan on changing to headers in the future.
I haven't ordered the cam yet, so please advise if you see any major flaws with my choice.
Has anyone experience with the pushrod length that is required for this cam?
Alex
#3
TECH Addict
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
The LS1 does not need a lot of timing to make good power. I am running 8.8 dcr but have 93 octane. Getting timing dialed in took some time but it runs great.
#5
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
This is my first LSx engine I modify.
My experiences with SBCs were that they started to knock already below 8.0 DCR.
That is why I better ask twice before making expensive mistakes.
Any changes you would make to my combo?
It going into a daily driven C5 Corvette.
My experiences with SBCs were that they started to knock already below 8.0 DCR.
That is why I better ask twice before making expensive mistakes.
Any changes you would make to my combo?
It going into a daily driven C5 Corvette.
#7
TECH Senior Member
iTrader: (7)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
How long in the future before you order headers? If they are a long ways down the road, rather than just a couple months, then I would use a cam with much more exhaust duration. Assuming you want to target the same overlap and IVC, I'd suggest a 214/226 114 +2. This will still work fine with headers too.
Trending Topics
#9
TECH Senior Member
#11
TECH Senior Member
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
accepted safe limits 8.5>8.7 on 91 octane, 8.7> 8.9 on 93/94
I run 8.8x DCR on 12:1 compression, 1 step colder plugs, .040 quench, 93 octane and shoot nitrous (100) with no issues (24>27* timing depending on rpm)