hot cam
Thread Starter
Joined: Sep 2004
Posts: 4,085
Likes: 77
From: Fort Myers Florida
hot cam 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?
Thread Starter
Joined: Sep 2004
Posts: 4,085
Likes: 77
From: Fort Myers Florida
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?
Launching!
Joined: May 2004
Posts: 203
Likes: 0
From: Stranger in a Strange Land
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.
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.
Thread Starter
Joined: Sep 2004
Posts: 4,085
Likes: 77
From: Fort Myers Florida
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
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TECH Enthusiast
Joined: Jul 2004
Posts: 546
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From: Washington
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.
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On The Tree
Joined: Mar 2004
Posts: 175
Likes: 1
Originally Posted by a98firebird
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?
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
TECH Enthusiast
Joined: Jul 2004
Posts: 546
Likes: 1
From: Washington
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.
Thread Starter
Joined: Sep 2004
Posts: 4,085
Likes: 77
From: Fort Myers Florida
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?
On The Tree
Joined: Mar 2004
Posts: 175
Likes: 1
Originally Posted by a98firebird
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?
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.
