So just wondering if anyone has upgraded their cams yet......Or are there any for the LNF?

 

Tubo and cams...

eh. ill pass.


dont think anyone has had the interest. no need

 

http://tunersource.gmblogs.com/Racer...FO-SHEET-2.pdf

Decent info...from the article "LNF - Cannot be replaced by the GM Performance Parts cams set or any aftermarket cams set"

So if it was done it looks like you'd have to re-grind a stocker. The exhaust cam in the LNF comes from the same casting as the LE5 intake and exhaust cams though so it may be possible to re-grind an LE5 exhaust cam for use as an LNF exhaust cam. The design of the intake cam on the LNF makes it pretty much impossible to replace with aftermarket or from another Ecotec from what I've read.

 

Someone will make cams for these eventually. But before any cams are made, we need some stock head flow numbers to see if any gains from cams would take place.

 

^^ im not positive, but i thought the LNF head has the same flow rates as the LSJ/L61 heads. None of the ecotec heads outflow any of the others by a significant margin.

 

hmmmm.....Interesting

 

If that is true a ported head should net some decent gains. Even on the stock cams. We can adjust them with HP Tuners so they act like longer duration cams.

 

Word. I highly doubt it's the same head flow numbers though.

 

Actually, the LNF head is pretty much garbage as far as intake flow is concerned. It's not even close to the LSJ head.

With the fuel pump lobes incorporated into the LNF intake cam, no other existing cams can be run in it's place. The LE5 exhaust cam will swap in place of the LNF exhaust cam, but it's not much of an upgrade, if at all. It's about 1.4 degrees more duration, but about .006" less lift.

 

Any plans to make a ported head for us?

 

Is this a guess or have you flow benched the head?

 

There is now. We couldn't believe how poorly they flowed.

 

Already. Link to product please. What did the stock head flow on the flow bench?

 

We've done extensive flow testing between many different combinations. The LNF intake is by far a very poor contender.

I meant there is plans now.(Now that we know how poorly they flow.) We have a ported head finished and going on our car soon. We have a couple more LNF heads out in the shop. I'll check and see how soon we might have more done.

 

Thanks. How many CFM did the stocker flow and at what restriction?

 

cobalts getting killed off in 2010...I dont think comp cams and hks gives 2 ***** about it

 

click

doesnt matter if they kill off the cobalt long as they keep making LNFs

 

doubt it will make a diff. pontiac might go in the dumpster

 

I don't remember the exact numbers. I'll have to check with our cylinder head tech tomorrow.

 

dude...the LNF is the greatest 4cyl to come from GM ever! it will be around for a while. Likewise, VVT and direct injection arent going anywhere, so future iterations of the ecotec probably wont vary much from the LNF

 

With the fuel scare... i can only see the ecotec getting more money put into it.. we will probably see one in a future corvette Sad but true, i think someone will design cams eventually, and if not, just get one custom made, trust me, if you pay a cam company they will do it for you. It really isn't the time to be turning away business

 

comp cams has a set we can work with - either in bolt-in app or ECM modded app:

http://www.compcams.com/Cam_Specs/Ca...csid=1079&sb=2 (I ordered one)

http://www.compcams.com/Cam_Specs/Ca...csid=1080&sb=2

http://www.compcams.com/Cam_Specs/Ca...csid=1083&sb=2

 

Thanks, please do. I am interested.

 

Keep in mind that all flow benches will vary. These numbers are for comparing the LSJ to LNF only. These are for completely stock cylinder heads.

at 28"--LSJ I--LNF I--LSJ E--LNF E
.100"---76----67.5---72.5---68.5
.200"--152---131---138.5--137
.300"--216.5-164.5-156----164.5
.350"--232---170.5-158.5--170.5
.400"--242---167.5-161----174.5
.450"--247---165.5-163.5--177
.500"---------164.5----------179.5

 

Judging by those numbers, the LNF could probably pick up some decent horsepower with just some head porting and stock cams.