Magnet

iTrader: (36)

hey im looking for a cam that will give me good numbers but I also dont want to change valve springs. would the hot cam be a good one or is there something better?

98Grnz28

iTrader: (7)

You still need to change the springs with a hot cam. But, a hot cam is a good cam. I have a hot cam for sale and springs.

44mag

iTrader: (1)

asa cam by gm performance 226/236 .525 .525 110 lsa. you will make more power than the hot cam. go with a set of comp 918s and you wont have to change valvesprings again.

UtOhCop

Just order a custom cam that doesn't use high lift.

My custom cam only has .550 Lift. I use LS6 springs.

Magnet

iTrader: (36)

so if i go with 918's i wont have to change them again? b/c i dont really want to mess around with that all the time. also do you think i went with a cutom cam with not too muhc lift lie you said would i still make good numbers?

TheHun

Hotcam was my first choice becouse the same reason what you mentioned (no valve spring changes ever) then finally I went with the ASA.
ASA makes more power over the hotcam same lift no need to worry about changing your valve springs again.
But you still need to update your valve springs with any aftermarket cam.
Comp 918's maybe LS6 springs, hardened pushrods etc.
And you will need a tune too.

And I just checked your sig...A4 you need a matching torque c.

Magnet

iTrader: (36)

i have just started looking into cam options so dont hate if i sound like an idiot, b/c i am, but what is an asa? i know its a cam but is that a brand and what kind of specs and drivability does it have. again sorry for being a retard

narcszm

the GM ASA cam was for GM's ASA racing effort with their LS1 trans ams. 226/236 on a 110° LSA with .525" lift. Hotter than a hot cam. Nasty idle, and good lift for stock heads because they don't flow much better past .525" anyway.

fnbrowning

Well, I spent hours pouring over specs till my eyes crossed. I liked the GM Hot Cam, but it's 110 LSA creates some drivability issues.
I called several cam tech lines and talked to their people. The nicest and most helpful guys were the techs from Lunati and Comp Cams.

I had a long conversation with Andrew, a Comp Cams tech. With his help, I finally chose a cam that closely mirrored the GM Hot Cam with a more idle friendly 114 LSA.

I may leave some horsepower on the table, but with the this lobe, the valve train should last for years of reliable driving.
I also bought Comp Cams #26915 springs & 7.400 push rods.
You don't need the #918 springs.
The Comp Cams #26915 springs may tend to be less brittle over the long run. Bought them NIB on eBay for $143.00.

The specs are below.

PART #: 54-000-11 ENGINE: LS1 CHEVY LS1/GEN III '97-UP ROLLER
GRIND #: LS1 3767R /3753R HR114.0
GROSS VALVE LIFT .532 .535
DURATION @ .006 TAPPET LIFT 273 277
VALVE TIMING OPEN CLOSE @ .050 INT 0 40 EXH 50 6-
SPECS FOR CAM INST. @ 110.0 CENTERLINE
INT EXH DURATION @ .050 220.00 224.00
LOBE LIFT .313 .315
LOBE SEPARATION 114.0
ROCKER ARM RATIO 1.70

darkside

The hotcam would be a pain in a a4 so you'ld need a good tune.

narcszm

actually, if you just change springs and go with 1.85 ratio rockers, that makes your stock cam a 220/228 .540"/.540" on a 116° LSA. That pencils out to a really nice cam, and all the work is on top; no need to much with changing the cam.

Magnet

iTrader: (36)

i heard that the 1.85 rockers dont do much power wise. but i really dont know. i want more pwer though even if it does give you some. how much would a good tune from a creditable dealer cost?

fnbrowning

Extended ratio rockers have been discussed at length here or on LS2.com.

It seemed that the consensus was that due to the fulcrum {or pivot point} of the 1.85 rockers, you don't achieve the full benefit of the duration you would see if you changed the cam instead. It's a question of the rocker not making the full 1.85 until the total lift.

That, with the fact that your LSA remains the same, and moving the LSA also moves the torque curve in a way that produces more power where you want it the most.