streetshenanigans

Good evening folks!

I'll start with I did use the search button.... a lot, and didn't find much.

Quick question. Has anyone run one of the early(99-00) LS1 cams on a turbo 4.8?What kind of results did you get?

I am putting together a low mileage 4.8 to replace the billion mile one in my Nova and was wondering if this cam is worth the time. I got it for next to nothing so I'm going to give it a whirl I think. I vaguely remember seeing a magazine test that put it at like 65hp more at peak than the Lr4 cam... that would be worth it I think. Not building some monster race car, just a fun street car.

74 nova
4.8 with gapped rings, head studs, pac springs
th400
3.08 gears (goingto 3.42 this winter)
On3 7665 turbo

nine8ss

iTrader: (5)

I think you are referring to this write up from a couple years back.


http://www.hotrod.com/articles/ls-cam-test-comparison/

Sales3@Texas-Speed

iTrader: (2)

That article was very misleading. Peak vs peak on that cam only picked up 29hp at the crank. They say it picked up 63hp because the stock cam peaked at 5,200 rpms and fell off from there. The new cam pulled to 5,500 rpms. Their claim of a 63hp gain is at 5500 rpms. Not exactly a fair statement is it.

Lonnie

ss454327

iTrader: (10)

What cam did they call the LS6 cam? The specs of the LS2 cam are the same as the baby LS6 and the bigger LS6 cam was 204/218 int/exh @ 0.05" duration 0.551" / 0.547" int/exh lift 117 LSA

streetshenanigans

I saw that and that's just fine. I take mine over 6500 so that would actually benefit me quite a bit. Under boost I can feel the stock cam start to trail off and I'd like to eliminate that issue. The motor will be apart anyhow so swapping the cam isn't a big deal. Was just wondering if anyone had any personal experience with one on a similar setup

stockA4

I'm really glad you asked this question as I have been pondering a similar setup. I have a 4.8 swapped 4th gen camaro with a 4l60e and 2.73's that I plan on turboing at some point in the future but I'm really having a blast driving it as it is now.

I had a few spare oem cams lying around when I put my 4.8 together, and I debated between a 98-00 fbody cam and the Lq9 or late LS1 cam. I ended up going with the Lq9 cam because I was worried about losing to much off idle torque with my 2.73's.

As far as my research on cams goes...
The Lq9 cam specs at 196/208 .467/.479 116 -1
The 98-00 cam specs at 199/209 .500/.500 119.5 -2.5

So installed dot to dot the valve events @.050 for the Lq9 cam are
ivo -19
Ivc 35
Evo 39
Evc-11
Overlap -30

For the 98-00 cam they are
ivo-22.5
Ivc 41.5
Evo 41.5
Evc-12.5
Overlap -35

The real significance between these two cams is the later intake valve closing point of the 98-00 cam at 41.5, which is roughly the same as the popular 02-04 zo6 cam that closes the intake valve at 42 ABDC, which everyone says is gutless below 3000 rpm in a 4.8 or 5.3 In a heavy or low geared vehicle. This is why a stock cammed 98-00 fbody will tend to pull a little harder above 4500 rpm than a stock cammed 01-02 car. The 01-02 car will, however be a bit stronger in the lower revs producing more tourqe due to the added overlap which promotes scavenging and the earlier intake closing point which helps maximize cylinder pressure at lower revs.

The differences in performance between these two cams will be even more pronounced when we install them in an engine displacing 53 less cubic inches!

I really like my little 4.8L and it runs really well with the smaller Lq9 cam, even with a stock stalled 4l60e and 2.73's. On the street It will sqeal it's 16" all season tires just a little at the start and then it relentlessly pulls it's little short stroke butt off until I shift it out of 1st gear at a screaming 6800 rpm at just over 60mph. My beater 4.8 swap has already embarrassed quite a few mustang boys out on the street and it will only get better with a little turbocharger and an appropriately matched stall converter!

I think that with your setup you could go ahead and use the 98-00 cam and see good results. Adding Deeper gears will help get you moving regardless of any minor loss in low end tourqe and get the little 4.8 up in the revs where it can make its power that much faster. With your boost dialed in the later intake closing and added lift of the early LS1 cam will better fill the cylinders at the upper end of the Rev range for more top end power that will carry much better than the stock cam ever could.

Let us know how it works out for you and have fun with your "305" of the lsx world haha,

In all seriousness though I really love these little engines! And I'm always amazed at the power they can make under boost. I really wish I could build one for Max power n/a just to see what could really be done with one.

SilverSS

iTrader: (30)

Mightymouse comes to mind. not a 4.8 but I remember this thread from way back.

https://ls1tech.com/forums/forced-in...lly-funny.html

stockA4

That's great! Well there's your proof Op! Now you gotta do it!

Forcefed86

iTrader: (4)

Great budget cam for a turbo 4.8 IMO.

The blue $60 (possibly cheaper) LS6 springs would provide more than enough valve train control as well IMO. Could even shim them a bit if you planned on revving it out or adding more boost. PAC1218's have gotten expensive for what they are...

http://www.ebay.com/itm/12625033-GM-...FS6rur&vxp=mtr

streetshenanigans

I have the PAC springs that should be plenty able so we'll see how it goes!!!

stockA4

Did you ever get this going?

Raider9170

Actually my buddy took that cam and put it in his car.

stockA4

​​​​​​how do you like the Low speed driveabillity with that cam in your 4.8? does the trick flow cam have any advance ground into it? I've never seen a cam card for it before.
I'm going to pop a used comp 212/218 high lift in my 4.8 soon and I'm wanting it to drive nice down low and I can't decide if I should advance it or just put it in straight up dot to dot.

truckdoug

iTrader: (25)

i plan on using this cam in a gt45'd 5.3