ETP 215's @ around 59cc, how does PTV compare to ported GM castings?
12-31-2005, 06:50 PM
#1
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ETP 215's @ around 59cc, how does PTV compare to ported GM castings?
Cylinder Head: G III LS1 11° Application: Street / Race
Port Volume: 215cc Chamber Volume: 35cc to 72cc
Test Bore: 3.900" Test Pressure: 28.00" Water
Intake Valve: 2.040" Exhaust Valve: 1.570"
Valve Lift Intake Exhaust Valve Lift
.100" 74 57 .100"
.200" 152 106 .200"
.300" 219 150 .300"
.400" 266 190 .400"
.500" 301 204 .500"
.550" 312 208 .550"
.600" 320 211 .600"
.650" 323 214 .650"
Port Volume: 215cc Chamber Volume: 35cc to 72cc
Test Bore: 3.900" Test Pressure: 28.00" Water
Intake Valve: 2.040" Exhaust Valve: 1.570"
Valve Lift Intake Exhaust Valve Lift
.100" 74 57 .100"
.200" 152 106 .200"
.300" 219 150 .300"
.400" 266 190 .400"
.500" 301 204 .500"
.550" 312 208 .550"
.600" 320 211 .600"
.650" 323 214 .650"
How do the 225's compare?
What sized cc are most of you guys running on N/A 346/347 setups with a decent sized cam?
***Edit:
I'm thinking of mating a set of ET's with this pooch of a cam:
Advertised Duration IN/EX: 298/301
Duration @.050 IN/EX: 237/242
Gross Valve Lift IN/EX: .595"/.595"
Lobe Sep Angle / Intake Ctr Line: 112/108
Valve Lash IN/EX: Hyd/Hyd
RPM Range: 3000-6500
Duration @.050 IN/EX: 237/242
Gross Valve Lift IN/EX: .595"/.595"
Lobe Sep Angle / Intake Ctr Line: 112/108
Valve Lash IN/EX: Hyd/Hyd
RPM Range: 3000-6500
****Editx2:
Aw hell, maybe I should throw on some Comp 921's and a Trak to take advantage of the great upper lift flow.
231/234 .640/.590 112 LSA
TIA.
Last edited by SouthFL.02.SS; 12-31-2005 at 08:09 PM.
12-31-2005, 07:25 PM
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From my understanding, when I bought my ETP's and asked all the questions... ETP uses the 11* valve arrangement which offers up an additional .010" of clearance for P2V than traditional castings. Which is quite a lot.
12-31-2005, 07:33 PM
#3
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Originally Posted by CAT3
From my understanding, when I bought my ETP's and asked all the questions... ETP uses the 11* valve arrangement which offers up an additional .010" of clearance for P2V than traditional castings. Which is quite a lot.
I wonder if 215's or 225's would best suit my needs.
Just eyeballing, it seems like 225's may be worth about 10 more ponies in the .550-.600 range.
01-01-2006, 01:07 AM
#5
Originally Posted by SouthFL.02.SS
On a stock bottom end 346, how does PTV on these heads compare to say your typical 5.3's at similar CC?
How do the 225's compare?
What sized cc are most of you guys running on N/A 346/347 setups with a decent sized cam?
***Edit:
I'm thinking of mating a set of ET's with this pooch of a cam:
Low end is no longer a priority for me, but valvetrain stress is.
****Editx2:
Aw hell, maybe I should throw on some Comp 921's and a Trak to take advantage of the great upper lift flow.
231/234 .640/.590 112 LSA
TIA.
How do the 225's compare?
What sized cc are most of you guys running on N/A 346/347 setups with a decent sized cam?
***Edit:
I'm thinking of mating a set of ET's with this pooch of a cam:
Low end is no longer a priority for me, but valvetrain stress is.
****Editx2:
Aw hell, maybe I should throw on some Comp 921's and a Trak to take advantage of the great upper lift flow.
231/234 .640/.590 112 LSA
TIA.
Is that bare casting price for a pair or is that a base setup with valvetrain???
01-01-2006, 09:01 AM
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Thats complete. I think you'd personally be happier with the 225's unless you plan on forever staying with the smaller, stock like cams. Why pay twice, if you can wait and grow into it?
01-01-2006, 09:09 AM
#7
Originally Posted by CAT3
Thats complete. I think you'd personally be happier with the 225's unless you plan on forever staying with the smaller, stock like cams. Why pay twice, if you can wait and grow into it?
I was trying to get an idea of their pricing. I like their C5R heads on a 427 (dreaming)
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01-01-2006, 10:59 AM
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ET heads are sweet. Go with the 225`s for the build you will do one day. They will flow sweet, and give you all the room to grow with a bigger cubed motor!
01-01-2006, 11:02 AM
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Thats the right theory there. Hell I am already looking having to pick up a set of 245 or 255's probably next year (winter 2006) for the "thing to come."
01-01-2006, 11:14 AM
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I was inclined to do another build based on budget heads, lower lift and non aggressive lobes. But I've decided, screw it, let's go all out and experiement (why the hell not?).
ETP 225's + TRak's LSK lobes on the intake to take me into the .600-.650 zone.
Now I've got to figure out how much to mill to get me close to 11:1 compression without needing to flycut.
Also, PR length needs to be figured out after that.
ETP 225's + TRak's LSK lobes on the intake to take me into the .600-.650 zone.
Now I've got to figure out how much to mill to get me close to 11:1 compression without needing to flycut.
Also, PR length needs to be figured out after that.
01-01-2006, 11:48 AM
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Originally Posted by SouthFL.02.SS
I was inclined to do another build based on budget heads, lower lift and non aggressive lobes. But I've decided, screw it, let's go all out and experiement (why the hell not?).
ETP 225's + TRak's LSK lobes on the intake to take me into the .600-.650 zone.
ETP 225's + TRak's LSK lobes on the intake to take me into the .600-.650 zone.
you and I are in the same boat My mind says ETP 225 with an EDC custom cam, my kids braces say stock 243 castings with a ASA cam or one of those lunati grinds 
01-01-2006, 12:32 PM
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Originally Posted by TAF Motorsports
you and I are in the same boat My mind says ETP 225 with an EDC custom cam, my kids braces say stock 243 castings with a ASA cam or one of those lunati grinds Ed
01-01-2006, 01:32 PM
#13
Originally Posted by CAT3
From my understanding, when I bought my ETP's and asked all the questions... ETP uses the 11* valve arrangement which offers up an additional .010" of clearance for P2V than traditional castings. Which is quite a lot.
01-01-2006, 02:14 PM
#14
On a stock bottom end 346, how does PTV on these heads compare to say your typical 5.3's at similar CC?
How do the 225's compare?
On our stock shortblock pistons .005 out of the hole, 225s milled to 61cc with a 2.08 intake valve had more clearence then stock heads unmilled. The motor actually wouldnt turn over with the stockers on it
If you go with the ETs... cam choice will differ from what your used to
How do the 225's compare?
On our stock shortblock pistons .005 out of the hole, 225s milled to 61cc with a 2.08 intake valve had more clearence then stock heads unmilled. The motor actually wouldnt turn over with the stockers on it
If you go with the ETs... cam choice will differ from what your used to
01-01-2006, 02:34 PM
#15
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Thread Starter
Originally Posted by GrannySShifting
On a stock bottom end 346, how does PTV on these heads compare to say your typical 5.3's at similar CC?
How do the 225's compare?
On our stock shortblock pistons .005 out of the hole, 225s milled to 61cc with a 2.08 intake valve had more clearence then stock heads unmilled. The motor actually wouldnt turn over with the stockers on it
If you go with the ETs... cam choice will differ from what your used to
How do the 225's compare?
On our stock shortblock pistons .005 out of the hole, 225s milled to 61cc with a 2.08 intake valve had more clearence then stock heads unmilled. The motor actually wouldnt turn over with the stockers on it
If you go with the ETs... cam choice will differ from what your used to
01-01-2006, 02:36 PM
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Originally Posted by TAF Motorsports
you and I are in the same boat My mind says ETP 225 with an EDC custom cam, my kids braces say stock 243 castings with a ASA cam or one of those lunati grinds I hear ya. If I'm gonna **** off the wife with another project, I'm gonna make it worth my while.
01-02-2006, 11:38 PM
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Cary was saying something like .150" extra free drop with the 11 degree valve arrangement. You can get pretty stupid with the cam duration before you run into problems. Always good to check though. Maybe talk to EDC about a custom grind. The TRak cam is sweet but I was to understand that it was built around a stock style exhaust system.
Have something custom ground. You'll be happier in the long run.
Nate
Have something custom ground. You'll be happier in the long run.
Nate
01-02-2006, 11:49 PM
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Originally Posted by Nate_Taufer
Cary was saying something like .150" extra free drop with the 11 degree valve arrangement. You can get pretty stupid with the cam duration before you run into problems. Always good to check though. Maybe talk to EDC about a custom grind. The TRak cam is sweet but I was to understand that it was built around a stock style exhaust system.
Have something custom ground. You'll be happier in the long run.
Nate
Have something custom ground. You'll be happier in the long run.
Nate
Thunder Racing Custom "CheaTR" Camshaft - 214/230 .601/.578 117 LSA. Off Idle-6800 RPM Power Band. Broad power range. Works well with stock exhaust manifolds and catalytic converters. Stock like idle. Minor tuning required on automatic transmission cars. Due to the fast ramp rate of this camshaft, the use of 1.8 rockers is not recommended.
