P/P Heads
Thread Starter
Burning Brakes
Joined: Dec 2002
Posts: 1,157
Likes: 5
From: Eastern PA
P/P Heads
Long story short, I need to put a new engine in my C5. It's going to be a 415 build-up from a LS3 block via a CF vendor.
I was going to reuse my current, slightly worked, stock 241 heads from the previous build, but it seems #7 and #5 cylinder portions of one head were also damaged. (Looks like someone had scraped/gouged out the edges from within the cylinder. They look really rough, even with machining. The mech said those areas had actually melted.)
I could reuse these heads (using them for just daily driving). However, I like to do a few HPDEs every year and I'd rather not face the possibility of the already weakend areas failing and killing this new set-up.
So...here I my choices, prices in addition to my engine costs:
- Donor, stock 241 heads, fully P/P @ ~$1XXX
- Donor, stock 243 heads, fully P/P @ ~$2XXX
- New, L92 head setup, w/ other engine considerations @ ~$4XXX
Constructive opinions? Thanks!
I was going to reuse my current, slightly worked, stock 241 heads from the previous build, but it seems #7 and #5 cylinder portions of one head were also damaged. (Looks like someone had scraped/gouged out the edges from within the cylinder. They look really rough, even with machining. The mech said those areas had actually melted.)
I could reuse these heads (using them for just daily driving). However, I like to do a few HPDEs every year and I'd rather not face the possibility of the already weakend areas failing and killing this new set-up.
So...here I my choices, prices in addition to my engine costs:
- Donor, stock 241 heads, fully P/P @ ~$1XXX
- Donor, stock 243 heads, fully P/P @ ~$2XXX
- New, L92 head setup, w/ other engine considerations @ ~$4XXX
Constructive opinions? Thanks!
Last edited by kedvesh; Jan 9, 2009 at 08:20 AM.
Drifting
Joined: Sep 2006
Posts: 1,757
Likes: 13
From: Stillman Valley Illinois
Long story short, I need to put a new engine in my C5. It's going to be a 415 build-up from a LS3 block via a CF vendor.
I was going to reuse my current, slightly worked, stock 241 heads from the previous build, but it seems #7 and #5 cylinder portions of one head were also damaged. (Looks like someone had scraped/gouged out the edges from within the cylinder. They look really rough, even with machining. The mech said those areas had actually melted.)
I could reuse these heads (using them for just daily driving). However, I like to do a few HPDEs every year and I'd rather not face the possibility of the already weakend areas failing and killing this new set-up.
So...here I my choices, prices in addition to my engine costs:
- Donor, stock 241 heads, fully P/P @ ~$1XXX
- Donor, stock 243 heads, fully P/P @ ~$2XXX
- New, L92 head setup, w/ other engine considerations @ ~$4XXX
Constructive opinions? Thanks!
I was going to reuse my current, slightly worked, stock 241 heads from the previous build, but it seems #7 and #5 cylinder portions of one head were also damaged. (Looks like someone had scraped/gouged out the edges from within the cylinder. They look really rough, even with machining. The mech said those areas had actually melted.)
I could reuse these heads (using them for just daily driving). However, I like to do a few HPDEs every year and I'd rather not face the possibility of the already weakend areas failing and killing this new set-up.
So...here I my choices, prices in addition to my engine costs:
- Donor, stock 241 heads, fully P/P @ ~$1XXX
- Donor, stock 243 heads, fully P/P @ ~$2XXX
- New, L92 head setup, w/ other engine considerations @ ~$4XXX
Constructive opinions? Thanks!
You are going to be spending a fair amount of money on a 400+ ci engine, dont scrimp on the heads. Speak to your builder, to some research. Get a PROVEN combination of heads & cam.
Drifting
Joined: Mar 2002
Posts: 1,298
Likes: 12
From: Salt Lake City UT
For that big an engine it seems you have a few choices.
LS3 or L92 heads - most cost effective - approx. 330cfm stock / approx. 360 cfm CNC'd
AFR 225's or Trick Flow 235's - a little more flow - a little more expensive
All of the above heads work well with 4.00 plus bores.
The 243's flow about 270cfm stock and approx 300 cfm CNC'd
cost a little less than L92's - can use LS6 intake
The above is at approx. .600 lift on flow numbers
The L92's or LS3's require the L76 intake or the new Weiand or FAST (soon to be available).
Note: the right cam is critical to work effectively with LS3's or L92's.
talk to engine builder or if you go with AFR"s talk to Tony Mamo (he is the man for right combination that really works).
LS3 or L92 heads - most cost effective - approx. 330cfm stock / approx. 360 cfm CNC'd
AFR 225's or Trick Flow 235's - a little more flow - a little more expensive
All of the above heads work well with 4.00 plus bores.
The 243's flow about 270cfm stock and approx 300 cfm CNC'd
cost a little less than L92's - can use LS6 intake
The above is at approx. .600 lift on flow numbers
The L92's or LS3's require the L76 intake or the new Weiand or FAST (soon to be available).
Note: the right cam is critical to work effectively with LS3's or L92's.
talk to engine builder or if you go with AFR"s talk to Tony Mamo (he is the man for right combination that really works).
Instructor
Joined: Sep 2008
Posts: 192
Likes: 1
From: Ashton
Hi guys! There was a good articel in GM hightectperformance.com back in sept06,
my first stroker build. check it out! on heads by ET performance, I would go with 225s to start, $2399.95 ready to install. these heads make big HP! Good luck!
my first stroker build. check it out! on heads by ET performance, I would go with 225s to start, $2399.95 ready to install. these heads make big HP! Good luck!
Pro
Joined: Oct 2005
Posts: 733
Likes: 0
From: Vanceboro NC
I wouldn't recommend 241's and 243's for a 415ci engine. Those combustion chambers are better suited for 3.90 bores. The Dart 225's with a VJ will out flow and make better power than the AFR's etc. for about the same price you would spend on the AFR's, Trick Flow's.
If you go the L92 route the cam is key with that set-up. Only real problem with them is your limited to one intake until the others make it to production.
If you go the L92 route the cam is key with that set-up. Only real problem with them is your limited to one intake until the others make it to production.
Supporting Vendor
Joined: Sep 2007
Posts: 164
Likes: 36
Long story short, I need to put a new engine in my C5. It's going to be a 415 build-up from a LS3 block via a CF vendor.
I was going to reuse my current, slightly worked, stock 241 heads from the previous build, but it seems #7 and #5 cylinder portions of one head were also damaged. (Looks like someone had scraped/gouged out the edges from within the cylinder. They look really rough, even with machining. The mech said those areas had actually melted.)
I could reuse these heads (using them for just daily driving). However, I like to do a few HPDEs every year and I'd rather not face the possibility of the already weakend areas failing and killing this new set-up.
So...here I my choices, prices in addition to my engine costs:
- Donor, stock 241 heads, fully P/P @ ~$1XXX
- Donor, stock 243 heads, fully P/P @ ~$2XXX
- New, L92 head setup, w/ other engine considerations @ ~$4XXX
Constructive opinions? Thanks!
I was going to reuse my current, slightly worked, stock 241 heads from the previous build, but it seems #7 and #5 cylinder portions of one head were also damaged. (Looks like someone had scraped/gouged out the edges from within the cylinder. They look really rough, even with machining. The mech said those areas had actually melted.)
I could reuse these heads (using them for just daily driving). However, I like to do a few HPDEs every year and I'd rather not face the possibility of the already weakend areas failing and killing this new set-up.
So...here I my choices, prices in addition to my engine costs:
- Donor, stock 241 heads, fully P/P @ ~$1XXX
- Donor, stock 243 heads, fully P/P @ ~$2XXX
- New, L92 head setup, w/ other engine considerations @ ~$4XXX
Constructive opinions? Thanks!
Of course we recommend using after market roller rockers but that is in your best interest requardless of what heads you decide to run.
http://www.trickflow.com/partdetail....3&autoview=sku
Last edited by TrickFlowTech; Jan 13, 2009 at 09:42 AM. Reason: added link
