Intake Swap, someone explain this
Intake Swap, someone explain this What are the options and procedures as far as what goes on under the intake in the valley cover area. I'm not concerned with keeping DoD. What are the options as far as making this work?
Well, the stock valley cover feeds pressurized oil to the eight DOD lifters when the DOD solenoids are active, the gasket on the valley cover seals these eight oil channels.
You can sort of see this in this pic.
If deleting DOD through a valley cover swap, you probably want to ensure that these oil channels are sealed off to avoid having oil flow back from the lifters. Two options - plug the lifter holes or see if the LS4 gasket works with other valley covers. I think someone mentioned that the LS2 cover has the right gasket.
You can sort of see this in this pic.
If deleting DOD through a valley cover swap, you probably want to ensure that these oil channels are sealed off to avoid having oil flow back from the lifters. Two options - plug the lifter holes or see if the LS4 gasket works with other valley covers. I think someone mentioned that the LS2 cover has the right gasket.
#1: Use a stock valley cover and have the OPS tower cut at an angle and rewelded, that's what I did, it moves the OPS out of the way of the TB and it retains DOD. ( Stock LS4 manifold has the infamous restrictive D cutout in the intake throut to accomodate the OPS)
#2 Contact Street & Performance in Mena, AR. Their number is (479) 394-5711. The web address is www.hotrodlane.cc. They will have everything that you need to make the swap They have a machine valley cover and adaptor the moves OPS mount sideways. This also keeps DOD
#3 Use a valley cover from a NON DOD LS engine, remove DOD hardware. Have DOD turned off with tune
#2 Contact Street & Performance in Mena, AR. Their number is (479) 394-5711. The web address is www.hotrodlane.cc. They will have everything that you need to make the swap They have a machine valley cover and adaptor the moves OPS mount sideways. This also keeps DOD
#3 Use a valley cover from a NON DOD LS engine, remove DOD hardware. Have DOD turned off with tune
#1: Use a stock valley cover and have the OPS tower cut at an angle and rewelded, that's what I did, it moves the OPS out of the way of the TB and it retains DOD. ( Stock LS4 manifold has the infamous restrictive D cutout in the intake throut to accomodate the OPS)
#2 Contact Street & Performance in Mena, AR. Their number is (479) 394-5711. The web address is www.hotrodlane.cc. They will have everything that you need to make the swap They have a machine valley cover and adaptor the moves OPS mount sideways. This also keeps DOD
#3 Use a valley cover from a NON DOD LS engine, remove DOD hardware. Have DOD turned off with tune
#2 Contact Street & Performance in Mena, AR. Their number is (479) 394-5711. The web address is www.hotrodlane.cc. They will have everything that you need to make the swap They have a machine valley cover and adaptor the moves OPS mount sideways. This also keeps DOD
#3 Use a valley cover from a NON DOD LS engine, remove DOD hardware. Have DOD turned off with tune
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TECH Regular
Joined: Nov 2009
Posts: 446
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From: Farmington Hills, MI
Livernois Motorsports sells a DOD delete kit for G8s:
http://www.livernoismotorsports.com/...t.phtml?p=1927
I believe they have some plugs for the DOD lifter oil feeds, but you probably want to call them. Hopefully, they'll sell you just the parts you need, although doing the cam swap with their kit sure wouldn't hurt anything.
I'm pretty sure that all Gen IV castings have the OPSU in the same location, and that even with the LS2 valley cover you will have throttle neck clearence issues with the OPSU in the stock location. There are a couple threads with links to alternative valley covers for reverse mount intake manifolds (normal for us).
http://www.livernoismotorsports.com/...t.phtml?p=1927
I believe they have some plugs for the DOD lifter oil feeds, but you probably want to call them. Hopefully, they'll sell you just the parts you need, although doing the cam swap with their kit sure wouldn't hurt anything.
I'm pretty sure that all Gen IV castings have the OPSU in the same location, and that even with the LS2 valley cover you will have throttle neck clearence issues with the OPSU in the stock location. There are a couple threads with links to alternative valley covers for reverse mount intake manifolds (normal for us).
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Verdad Gallardo TECH Regular
Joined: Nov 2009
Posts: 446
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From: Farmington Hills, MI
So is another valley cover required? Could you possibly just cut and reweld the OPSU on the factory valley cover?
LS4 valley cover can be modified to fit a 78mm intake. Those who want to go to a 90mm LS2 or FAST need to use the LS2 valley cover. The LS2 can be modified enough to clear the larger intake neck.
I've seen something similar done to an LS7 swapped Fiero (intake in FWD orientation).
I've seen something similar done to an LS7 swapped Fiero (intake in FWD orientation).
LS4 valley cover can be modified to fit a 78mm intake. Those who want to go to a 90mm LS2 or FAST need to use the LS2 valley cover. The LS2 can be modified enough to clear the larger intake neck.
I've seen something similar done to an LS7 swapped Fiero (intake in FWD orientation).
I've seen something similar done to an LS7 swapped Fiero (intake in FWD orientation).
If I went the LS2 route, what would be necessary besides relocating the UPSU? Are there any advantages to doing the LS2 besides fitting a larger TB?
The LS2 is cheaper than the LS6, but doesn't flow quite as good as the LS6. There is no advantage going to a LS2 intake other than "bragging rights" over a big TB that isn't really necessary anyway.
There's a few threads on the LS6 swap. What it boils down to is cutting the OPSU mount at an angle, rotating the top piece 180*, and welding back on. This angles the sender enough to clear the LS6 intake neck. The problem is that you have to cut fairly high up because of the oil feed to the DOD solenoids - you just can't create enough clearance for a larger TB. Not an issue on the other valley covers because no DOD oil feed.
You can see the finished mount in my post above, but here's a slightly closer shot.
There's a few threads on the LS6 swap. What it boils down to is cutting the OPSU mount at an angle, rotating the top piece 180*, and welding back on. This angles the sender enough to clear the LS6 intake neck. The problem is that you have to cut fairly high up because of the oil feed to the DOD solenoids - you just can't create enough clearance for a larger TB. Not an issue on the other valley covers because no DOD oil feed.
You can see the finished mount in my post above, but here's a slightly closer shot.
The LS2 requires DOD delete...
So basically, if you don't care about keeping DoD you might as well just unplug it and use the LS4 valley cover with modified OPSU.
Very good. I'm getting cought up now. Just wanting to make sure of what I was getting into.
Very good. I'm getting cought up now. Just wanting to make sure of what I was getting into.