00pooterSS

iTrader: (40)

Does anyone know what the stock cam specs are for an L83? Or know where I should look for them?

Thanks in advance

G Atsma

Thought I would Google it! Went to the Summit "On All Cylinders" article on L83. Cam specs- "unavailable"..... SOMEBODY put one of these on a Cam Doctor SOON! lol

00pooterSS

iTrader: (40)

Well thanks for taking a shot at it. And yeah, on all cylinders is one of the best sources for the info and I had checked there already..

I'm pretty sure the info just isn't out there yet. No biggie, i'm sure it's very similar to the previous 5.3 cams so I can use that for now. But be super cool if the info popped up.

Texas speed has a cam doctor and has done a lot with L83 cams, they may have the answer but I don't want to waste their time with a phone call that isn't sales related. They do a lot for the community and stay real busy, and my question isn't important enough to take up their time.

G Atsma

Funny you should mention 5.3 cams. Back when Hot Rod did their big stock cam test in a 5.3 LM7, it was mentioned that the LQ9 was a nice upgrade for the 5.3. Well guess which grind is used on the Gen IV 5.3's with VVT? Not the exact LQ9 grind, but close; 196/201, .481/.481, 116 LSA +2. Just has a hair more lift than the LQ9. They went to this when VVT was intro'd to some of the 5.3's from the old 190/191 cam

00pooterSS

iTrader: (40)

LOL every time I see under 500 lift I have to stop and look at it for a second and go.. really??

G Atsma

Yeah, you'd think EVERY GM truck engine deserved AL LEAST .500 lift just to run right! Well, ONE truck engine does, the L92 6.2, which actually has .500 lift. I guess GM figured the 6.2 deserved a shot at breathing a little.... VERY little! LOL

TT427

iTrader: (1)

Ya but for a truck, that has to hit fuel mileage, emissions and be able to tow in all conditions and elevations and on whatever fuel driver x puts in the tank... Convinces me on why the tunes are relatively soft too. Anyone know of the l83 being pushed hard turbo or supercharger? Just wondering if this has more potential than the old 5.3...

G Atsma

Hey, I agree with you. It's just that we are so used to seeing lifts in the performance realm always .525 or better, it seems weird to see sub-.500 lifts in engines putting out 300+HP.

TT427

iTrader: (1)

Ya, I got ya, They do have factory ramps over .500 and stock springs will take .550 easily.

00pooterSS

iTrader: (40)

L83's and L86's are breaking stock springs with stock cams, so I wouldn't say that at all.

LS6 springs can do .550, but there aren't many other stock springs that do. LS2 and 3 probably can as well (and LSA and LS9 etc but I've never looked into it)


Any way if you want to see what the L83 can do, youtube tahakum motorsports (ta7akum on instagram) or follow them on instagram. I'm not sure if they are on facebook but they do a lot of trucks. And have several l83 trucks in the 9's. I believe most of them are stock internal motors. Pretty much all of them are stock trans rear ends axles etc.

00pooterSS

iTrader: (40)

Here is one of them too.

G Atsma

It do run run run it do run run.... QUITE well.... lol

TT427

iTrader: (1)

Ohh, I just assumed the spring was the ls6... thanks for the info on the trrucks.

00pooterSS

iTrader: (40)

That I'm aware of, all the truck springs are good for around .500, since all (that I'm aware of) come with less than .500 lift cams.

And no problem man