LS3 F35 cam Issues
Thread Starter
Intermediate
Joined: Jul 2017
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Safety Car
Joined: Sep 2007
Posts: 4,009
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From: South Florida
The only reason I am bringing that up is I've seen guys have tuning issues and it ends up being traced back to a faulty part or gasket. If you can find one to swap I would definitely consider it.
Race Director
Joined: Dec 2013
Posts: 12,502
Likes: 3,629
Short version, put the stock air system back on the car, and you will see the problem go away.
The stock air system already outflows the engines needs in the first place, and was designed so the Maf sensor location always is getting clean reading of air through it, no matter the RPM range of the car.
On a great deal of aftermarket intake system, lets just say that the placement of the Maf sensor locations on them, not in a clean air path of the system through out the entire range of air for the motor will be pulling in for the entire RPM range, and you end up with all kinds of reading problems from the Maf instead (again, your problem at hand).
Also to point out, since the air filter of the after market system is pulling in the air from the same location as the stock air filter system, the system you have in the car is not a cold air system to start with.
The stock air system already outflows the engines needs in the first place, and was designed so the Maf sensor location always is getting clean reading of air through it, no matter the RPM range of the car.
On a great deal of aftermarket intake system, lets just say that the placement of the Maf sensor locations on them, not in a clean air path of the system through out the entire range of air for the motor will be pulling in for the entire RPM range, and you end up with all kinds of reading problems from the Maf instead (again, your problem at hand).
Also to point out, since the air filter of the after market system is pulling in the air from the same location as the stock air filter system, the system you have in the car is not a cold air system to start with.
Thread Starter
Intermediate
Joined: Jul 2017
Posts: 35
Likes: 3
Unfortunately after swapping my intake to the Vararam system, it made very little improvement. Just a update like I said I would give.
Thread Starter
Intermediate
Joined: Jul 2017
Posts: 35
Likes: 3
Short version, put the stock air system back on the car, and you will see the problem go away.
The stock air system already outflows the engines needs in the first place, and was designed so the Maf sensor location always is getting clean reading of air through it, no matter the RPM range of the car.
On a great deal of aftermarket intake system, lets just say that the placement of the Maf sensor locations on them, not in a clean air path of the system through out the entire range of air for the motor will be pulling in for the entire RPM range, and you end up with all kinds of reading problems from the Maf instead (again, your problem at hand).
Also to point out, since the air filter of the after market system is pulling in the air from the same location as the stock air filter system, the system you have in the car is not a cold air system to start with.
The stock air system already outflows the engines needs in the first place, and was designed so the Maf sensor location always is getting clean reading of air through it, no matter the RPM range of the car.
On a great deal of aftermarket intake system, lets just say that the placement of the Maf sensor locations on them, not in a clean air path of the system through out the entire range of air for the motor will be pulling in for the entire RPM range, and you end up with all kinds of reading problems from the Maf instead (again, your problem at hand).
Also to point out, since the air filter of the after market system is pulling in the air from the same location as the stock air filter system, the system you have in the car is not a cold air system to start with.
Race Director
Joined: Dec 2013
Posts: 12,502
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Simply, if cam is causing all the intake air turbulence due to the wicked over lap that can not be solved at the MAF, or tune to clean up the Maf flow reading, then worst case, car gets tuned in open loop to solve the problem isntead.
Thread Starter
Intermediate
Joined: Jul 2017
Posts: 35
Likes: 3
Thread Starter
Intermediate
Joined: Jul 2017
Posts: 35
Likes: 3
I had Vengeance Racing re-tune it and they fixed the issue entirely. It ended up being a enrichment issue. Just a update.
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Thread Starter
Intermediate
Joined: Jul 2017
Posts: 35
Likes: 3
Thread Starter
Intermediate
Joined: Jul 2017
Posts: 35
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Safety Car
Joined: Sep 2007
Posts: 4,009
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From: South Florida
Le Mans Master
Joined: Dec 2005
Posts: 6,999
Likes: 1,685
From: Southeast TX
I think that goes back to how difficult a rig with a cam like that is to tune. I ran around on the stock tune for quite a while after I added heads and a much milder cam. Stack a bunch of overlap in there and your tuner had better be damn good.
Pro
Joined: Apr 2019
Posts: 699
Likes: 421
From: Armonk, NY
Out of curoisity did you drive any big cammed cars before deciding on the F35? It's a pretty big cam, if 3-4 shops are all saying the same thing.... you're probably gonna have to live with it unless you wanna keep throwing more and more money to tuners. Big cams come with quirks, some worse than others.
Le Mans Master
Joined: Dec 2005
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From: Southeast TX
Damn, in what scheme of things is a cam with .650 lift and 20 degrees of overlap a baby cam?
Race Director
Joined: Oct 2004
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.650" lift and 20° overlap do not a baby cam make. At least in my neck of the woods!!
Race Director
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Thread Starter
Intermediate
Joined: Jul 2017
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Yeah I checked everything mechanical and electrical, it turned out to be a tuning issue. It took 4 tuners but finally got one who got it fixed.
Instructor
Joined: Feb 2023
Posts: 123
Likes: 11
From: North of Boston
I have the SS3 Cam and LS3 ported heads, stock intake. Looking to bump mine up some.