Who has had P2V problems with 230ish cam
12-28-2007, 02:49 PM
#1
TECH Fanatic
Thread Starter
iTrader: (1)
Join Date: Nov 2003
Location: Gardnerville, NV.
Posts: 1,037
Likes: 0
Received 0 Likes
on
0 Posts
Who has had P2V problems with 230ish cam Who in here has firsthand knowledge of piston to valve contact with a 230ish cam and smaller 5.3 or similar heads?
I've heard hundreds of warnings, but it seems that cams such as the F14 or other 230ish duration ~.600" lift do clear.
Just curious, I wouldn't do it again without measuring to make sure. There's noting like knowing instead of guessing.
I've heard hundreds of warnings, but it seems that cams such as the F14 or other 230ish duration ~.600" lift do clear.
Just curious, I wouldn't do it again without measuring to make sure. There's noting like knowing instead of guessing.
12-28-2007, 05:09 PM
#2
11 Second Club
iTrader: (4)
Join Date: Mar 2007
Location: Grand haven ,MI
Posts: 580
Likes: 0
Received 0 Likes
on
0 Posts
I can tell you this a 232/234 xer barely turned over without hitting with afr 205's 59cc
with a stock gasket. maybe .020 intake . I would plan on flycutting but don't know what the valve drop is on your'e heads and this cam is xer lobe's . all i can say is check it
with a stock gasket. maybe .020 intake . I would plan on flycutting but don't know what the valve drop is on your'e heads and this cam is xer lobe's . all i can say is check it
12-28-2007, 06:02 PM
#3
On The Tree
iTrader: (4)
Join Date: Nov 2003
Location: Miami Fl.
Posts: 125
Likes: 0
Received 0 Likes
on
0 Posts
I have unmilled 5.3 stage 2.5 heads (63-64cc I think), stock MLS gaskets with a torquer v2 112+4 cam. Apparently all the PRC heads with larger valves run the 2.02 and not the 2.04 but their site doesnt reflect that.
With an LS6 intake, 80mm TB, 25% underdrive pulley, pacesetter LT's, B&B 3" Tri-Flow, Vig 3200 and 3.42 rearend I put out 415rwhp unlocked.
HTH,
Shane
With an LS6 intake, 80mm TB, 25% underdrive pulley, pacesetter LT's, B&B 3" Tri-Flow, Vig 3200 and 3.42 rearend I put out 415rwhp unlocked.
HTH,
Shane
12-28-2007, 06:24 PM
#5
11 Second Club
iTrader: (4)
Join Date: Mar 2007
Location: Grand haven ,MI
Posts: 580
Likes: 0
Received 0 Likes
on
0 Posts
like a comp xr vrs the xer will have 2 diff ptvc #'s with the same duration and lift due to how fast they come off the seat.
a ms 4 has big duration and is made to have good ptvc .
just saying don't take just duration as the only facter on how big you can go
aslo doe's never had problems mean never checked ? or checked and never had a problem?
12-28-2007, 07:38 PM
#6
I was on the phone with TEA about a set of 5.3 stage 2 heads earlier this week and was told not go over 228 duration and run stock GM head gaskets to assure PTV clearance without flycutting. This was unmilled. Kinda surprised me. TSP will recess the valves a bit on their 5.3's if you ask them to. It will give more clearance but it will affect flow a little also.
12-28-2007, 09:48 PM
#7
I've ran a 230/232 Futral Motorsports cam with TEA 5.3's shaved .025 without a problem. Installed a 232/236 cam also on those same heads without a problem.
About to install a FMS 230/234 cam on another set of 5.3's.
Saying you can't go over 228 in durations is kind of silly especially on an umilled head.
About to install a FMS 230/234 cam on another set of 5.3's.
Saying you can't go over 228 in durations is kind of silly especially on an umilled head.
Trending Topics
12-28-2007, 10:52 PM
#8
TECH Fanatic
Thread Starter
iTrader: (1)
Join Date: Nov 2003
Location: Gardnerville, NV.
Posts: 1,037
Likes: 0
Received 0 Likes
on
0 Posts
Yeah, I ended up with .100"/.180" clearance with the F14 and 5.3s with 2.02"s milled .003"-.005" But I wouldn't do it blindly, as stated above, it is really a function of ramp design more than lift or duration...it's like voltage and amperage, you can't have one without the other though.
And builders are always going to tell you the conservative plan, that's why guys that want to push it more take the time to measure and research. Questions like this help define the statistical averages, but there's always that oops factor. Now I'm thinking about maybe bumping my CR up with a .040" gasket and maybe shaving another .005"-.010" off.
We'll see how it runs in summer heat first though.
And builders are always going to tell you the conservative plan, that's why guys that want to push it more take the time to measure and research. Questions like this help define the statistical averages, but there's always that oops factor. Now I'm thinking about maybe bumping my CR up with a .040" gasket and maybe shaving another .005"-.010" off.
We'll see how it runs in summer heat first though.
12-29-2007, 01:01 PM
#10
I was on the phone with TEA about a set of 5.3 stage 2 heads earlier this week and was told not go over 228 duration and run stock GM head gaskets to assure PTV clearance without flycutting. This was unmilled. Kinda surprised me. TSP will recess the valves a bit on their 5.3's if you ask them to. It will give more clearance but it will affect flow a little also.
12-29-2007, 04:13 PM
#13
TECH Junkie
iTrader: (2)
Join Date: Jan 2006
Location: Fort Wayne, IN
Posts: 3,776
Likes: 0
Received 0 Likes
on
0 Posts
crane HR5 lobe 228/232 .600/.600 112LDA/107ICL 7*IVO with .030 milled LS6/#243 heads, -.012 deck, .051 thick head gasket with crane 1.7 quick lift rockers on top(this is what hurt me the most), I had .012 intake and .109 exhaust PTV.
