|12-13-2011 06:56 PM|
|kennyhammond||That k1103 can sounds about as far as I wana go with mine.... it don't need that much lump to it but sounds nice|
|12-13-2011 06:35 PM|
|kennyhammond||Yeah since it isn't going to be a everyday driver I thaught about a flat tappet.....but still can't get much lift or anything with the stock vortecs ..... still a toss uplol|
|12-13-2011 06:22 PM|
Between the two cams (the Howards and the GM) I would go with the Howards cam. I haven't been able to find the advertised duration for the stock Vortec cam, but going by the degrees on the ramps on the GM cam, I believe the Howards cam probably has smaller advertised duration even tho it has more at .050" lift, so I think it will give more low end torque and still give more topend too. If you were of a mind to change to a hydraulic flat tappet I would have to give serious consideration to the Summit K1103. It's Summit's version of the grind that GMPP uses in the 350HO 330HP crate engine with Vortec heads (which for practical purposes is your Vortec engine with a flat tappet cam). It has mild street manners (idles well with plenty of vacuum for power brakes), has a noticeable choppy idle, and pulls well.
Here's a Chevy with the K1103 cam.
|12-13-2011 05:03 PM|
|kennyhammond||Yeah not much rumble at all...... but its fine..a set of long tubes a d some flowmaster 44's. It will be OK..... if you have to choose witch can would you take.... I am sorry just don't know the pros a Con,s of either ...thansk for all your help...|
|12-13-2011 04:56 PM|
|BigEd36||I don't believe you'll have any choppiness to the idle, especially with the GM cam as the duration is shorter then the stock 350 300HP cam. The Howards cam has duration and LSA specs that are very close to the Summit K1102 flat tappet cam. I've found this YouTube video of a 355 with the K1102 cam idling. Actually, I like the exhaust note of this Camaro, has a nice rumble.|
|12-13-2011 09:43 AM|
|kennyhammond||For the last and final question ...will either of the cams have any rumble or notice to them....its not a deal breaker for me just like to have a little rumble ....if not its fine just curious|
|12-12-2011 04:24 AM|
|kennyhammond||Thank you fir sharing all you knowledge|
|12-11-2011 09:20 PM|
Howards gives the description for that cam as "Great daily usage, smooth idle, great fuel economy." The rpm range given is 800-4200 rpm, so it will pull right from idle. The cam and compression ratio chart that techinspecter1 linked to shows that 9.25:1 needs 208 degrees at .050", 9.5:1 needs 212 degrees. Your 9.4:1 falls between them so 208-212 degrees. The Howards is 207 degrees at .050" so it's pretty close. Hopefully techinspecter1 will chime back in on this. GM usually uses pretty long and gentle ramps so I suspect the Howards cam may be shorter on total duration (which will give more torque) even tho it's bigger at .050".
Another cam that would work well is GM #14097395. This is the cam used in the 383HT (383 High Torque) and 350 Ram Jet crate engines. It's $177.12 at Pace Performance Here's the description from the Pace Parts website:
I believe either of these cams would be a worthwhile upgrade to your Vortec 350.
|12-11-2011 01:52 PM|
|kennyhammond||Is that can going to be to much for what I am looking for....? Seems like the durations are high... just wardering|
|12-11-2011 01:36 PM|
|kennyhammond||OK thanks a lot...... realy appreciate the help....just hat I was wanting to know... am just making the motor to drive the truck to work and wanted somethen that would be good on the freeway..and still be able to break the tires over to make the son smile....thanks for the help guys|
|12-11-2011 11:27 AM|
|12-11-2011 04:39 AM|
|kennyhammond||Sorry just looked and I missed spelled some words in my post..... first all its a 98 block out of. 3/4 ton..... don't know if that matters|
|11-25-2011 02:34 PM|
192 intake/197 exhaust degrees duration at 0.050" tappet lift and 0.404"/0.414" valve lift.
This chart will tell you the range of cam duration to use with the static compression ratio of your motor.
Bottom line, I'd leave the motor stock until you decide to upgrade the rear gear to a performance number and change pistons to raise the static compression ratio so it will support more cam.
|11-25-2011 01:40 PM|
There are plenty of ways to do a nice budget upgrade. But what exactly are u looking for?
Here are a couple ways to get some budget HP/tq.
U have a great start with the roller block. You could buy an aluminum intake manifold, get your heads done to accept a higher lift cam, buy a nice 210-220° @50 roller for torque, some nice roller tip rocker arms. Full length long tube headers with at least 1 5/8 primaries.
With simple upgrades like this u could have a nice little motor and not much money spent.
|11-15-2011 09:42 PM|
rebuilding a chevy 350 with votec heads
ok i have a chevy 350 motor is out of a 2008 chevy 3/5 what are a couple things i can do to male some good torque money is tight so the cheaper the better and it is going into a 81 chevy c10 t350 transmission and 2.72 gears just a truck to drive to workand have some fun with (hince why i am not dropping alot of money in it)