6 bolt heads
^ Agreed. There's a lot of other things that go into account when selecting a set of heads. It's not just the flow numbers that tell you how they'll perform. The cross sectional area and runner size are a couple good indicators of performance. Looking at the exhaust to intake flow ratios help too. There's a lot of things to consider beyond performance. I haven't seen a set of ET heads before personally so I can't comment on them. I have a set of All Pro cathedral port heads and they are a work of art. They feature thick decks, the rocker area is super thick and reinforced, they feature a semi dry deck design, etc, etc....
TECH Enthusiast
Joined: Jan 2008
Posts: 625
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My builder called All Pro about their 6 bolt heads and after talking about the set-up the All Pros were closing in on $8,000 with the parts that were needed. ET gave us a price around $4,000 complete for the LS7 style 6 bolt heads. I think the LS1 6 bolt cathedrals were $3,899 complete. IIRC.
I guess FI doesn't really require the top flowing head anyway, so they'll all make monster power given enough psi.
I guess FI doesn't really require the top flowing head anyway, so they'll all make monster power given enough psi.
I got a quote from all-pro on their 6 bolt LS7 style head for $4700 with Enconel exhaust valves and BBC springs. If you went for all the top stuff, Titanium valves, Jessel rockers, etc., I can see them coming out to around $8K, that stuff is expensive. I also looked on ET's website and I don't see an advertised LS7 head that flow 397 at .650 int and 260 on the exhaust, where did you get that info? And your right, you don't need the best flowing head on the planet for FI.
On The Tree
Joined: Apr 2006
Posts: 118
Likes: 0
WCCH All Pro LSW heads . heard alot of good things about them.I'm gonna order a set .
http://www.proheads.com/products.html[/url]
Originally Posted by LSmonster:
I put a set on a 443 with a 3.3L whipple blower and made 900 HP & 950 ft/lbs of torque @ under 6000 RPM... ERL Super Deck block 4.200" bore, 4.0" stroke... 8:1 C/R.
Originally Posted by supersup:
Good chioce on the purchase of your WCCH heads,top notch quality,service,and independant advise.My L92 WCCH heads n/a pushed my lsx 427 to 588hp without breakin a sweat,looking forward to 800hp supercharged.
Originally Posted by rennfahrerx :
Here are results of a recent dyno test of our 436 cu. in. LS engine package using All Pro LSW cylinder heads ported by WCCH. As with everything we get from WCCH, the work on these heads was top quality. The engine is a Darton Sleeved block with Callies rotating assembly, CP Pistons, Comp Cams solid roller cam, GMPP LS7-style intake, custom 4150 Holley Carb, and American Racing stepped headers. We are looking to get even more power out of this package in the near future. 14:1CR
Praetorian Racing Engines
Phoenix, AZ
http://www.proheads.com/products.html[/url]
Originally Posted by LSmonster:
I put a set on a 443 with a 3.3L whipple blower and made 900 HP & 950 ft/lbs of torque @ under 6000 RPM... ERL Super Deck block 4.200" bore, 4.0" stroke... 8:1 C/R.
Originally Posted by supersup:
Good chioce on the purchase of your WCCH heads,top notch quality,service,and independant advise.My L92 WCCH heads n/a pushed my lsx 427 to 588hp without breakin a sweat,looking forward to 800hp supercharged.
Originally Posted by rennfahrerx :
Here are results of a recent dyno test of our 436 cu. in. LS engine package using All Pro LSW cylinder heads ported by WCCH. As with everything we get from WCCH, the work on these heads was top quality. The engine is a Darton Sleeved block with Callies rotating assembly, CP Pistons, Comp Cams solid roller cam, GMPP LS7-style intake, custom 4150 Holley Carb, and American Racing stepped headers. We are looking to get even more power out of this package in the near future. 14:1CR
Praetorian Racing Engines
Phoenix, AZ
The other thing to consider about the 6 bolt stuff is that right now ET isn't delivering heads (tell me how I know that!). They owe a number of places a number of sets of heads and keep pushing delivery back, and back, and back.
All Pro/WCCH seems to have a more readily available supply of castings at this time.
All Pro/WCCH seems to have a more readily available supply of castings at this time.
On The Tree
Joined: Apr 2006
Posts: 118
Likes: 0
I just read this today i found Texas Speed always come up with good products with the best price .
https://ls1tech.com/forums/generation-iv-internal-engine/912531-newly-updated-prc-ls7-cnc-heads-break-400cfm.html
Newly Updated PRC LS7 CNC Heads Break 400CFM!!
--------------------------------------------------------------------------------
Guys we just finished up the tweaked version of our all new PRC LS7 cylinder heads & these bad boys broke the 400cfm mark!
The cylinder heads were revised slightly when it was moved over to our new machine & we're completely thrilled with the results!
Keep in mind this is a tweaked version of the cylinder head that already pushed our 06 Z06 passed the 600rwhp mark!
Here's the flow data:
.300 251
.400 305
.500 351
.600 385
.650 395
.675 400
.700 403
ex
.300 184
.400 207
.500 224
.600 237
.650 244
The exhaust was flowed without a pipe, the bore plate was a ls1 4.130" bore.
https://ls1tech.com/forums/generation-iv-internal-engine/912531-newly-updated-prc-ls7-cnc-heads-break-400cfm.html
Newly Updated PRC LS7 CNC Heads Break 400CFM!!
--------------------------------------------------------------------------------
Guys we just finished up the tweaked version of our all new PRC LS7 cylinder heads & these bad boys broke the 400cfm mark!
The cylinder heads were revised slightly when it was moved over to our new machine & we're completely thrilled with the results!
Keep in mind this is a tweaked version of the cylinder head that already pushed our 06 Z06 passed the 600rwhp mark!
Here's the flow data:
.300 251
.400 305
.500 351
.600 385
.650 395
.675 400
.700 403
ex
.300 184
.400 207
.500 224
.600 237
.650 244
The exhaust was flowed without a pipe, the bore plate was a ls1 4.130" bore.
I just read this today i found Texas Speed always come up with good products with the best price .
https://ls1tech.com/forums/showthread.php?t=912531
Newly Updated PRC LS7 CNC Heads Break 400CFM!!
--------------------------------------------------------------------------------
Guys we just finished up the tweaked version of our all new PRC LS7 cylinder heads & these bad boys broke the 400cfm mark!
The cylinder heads were revised slightly when it was moved over to our new machine & we're completely thrilled with the results!
Keep in mind this is a tweaked version of the cylinder head that already pushed our 06 Z06 passed the 600rwhp mark!
Here's the flow data:
.300 251
.400 305
.500 351
.600 385
.650 395
.675 400
.700 403
ex
.300 184
.400 207
.500 224
.600 237
.650 244
The exhaust was flowed without a pipe, the bore plate was a ls1 4.130" bore.
https://ls1tech.com/forums/showthread.php?t=912531
Newly Updated PRC LS7 CNC Heads Break 400CFM!!
--------------------------------------------------------------------------------
Guys we just finished up the tweaked version of our all new PRC LS7 cylinder heads & these bad boys broke the 400cfm mark!
The cylinder heads were revised slightly when it was moved over to our new machine & we're completely thrilled with the results!
Keep in mind this is a tweaked version of the cylinder head that already pushed our 06 Z06 passed the 600rwhp mark!
Here's the flow data:
.300 251
.400 305
.500 351
.600 385
.650 395
.675 400
.700 403
ex
.300 184
.400 207
.500 224
.600 237
.650 244
The exhaust was flowed without a pipe, the bore plate was a ls1 4.130" bore.
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Verdad Gallardo I was talking to Richard a while ago about a few new things coming out:
Originally Posted by Richard@WCCH
I do have some programs almost finished to fit the LS7 head onto a smaller 4.0" bore application. In fact, the latest castings Bob is making will allow us to make a very small intake runner with a 2.125" valve that may be used on a 3.90" LS1 bore. I'm not sure how popular it will be so I'm dragging my feet finishing up the program. Also, the new castings won't be ready to machine for at least 6 weeks. I'll post a thread on the forum when that happens.
TECH Enthusiast
Joined: Jan 2008
Posts: 625
Likes: 0
I would think a head porter could take the ET heads and work them to flow up in those ranges, no?
I have some nice pictures of Greg Goode hand ported ET 240cc heads saved on my computer from BeardWS6's build. Search under his name and you'll find the flow sheets. I believe they went around 350ish, but I'm a little rusty.
With that said, I'd run the 4.0" version of the E/T LS7 head over ANY cathedral port head on the market. They will except damn near any spring you want to throw at it, same goes for valve train. And on the 4.0-4.65" bore stroker engines... They are wicked!
BUT to the poster who said his builder said like 8k to set them up... find another builder or just go through Richard at WCCH! He quoted you almost twice what it should cost.
Mightymouse has a set of the cathedral port All Pros for sale in the FS section if you want to save some serious coin on them.
I went with the AP's from WCCH and an LS7 intake. The intake measures 92.5mm across for the opening from the factory.
Last edited by 99blancoSS; May 11, 2008 at 01:36 AM.
I have seen 400 cfm+ from LS7 heads a year and half go from a hand porter. I'll take a 6 bolt better built head any day over a little more flow though since I'm FI. I just wish I could have went with them now but funds is needed on other stuff.
Dan
TFS 6 bolts are available now, you can phone order them from summit. The part number is floating around here somewhere.
TECH Resident
Joined: Jun 2007
Posts: 952
Likes: 0
Scroll down to the 235 section, pricing is $2550 ready to bolt on.
http://www.totalengineairflow.com/pr...gmhead/tfsls1/
We have these castings in stock and can ship them in just a few days.
Some pics of bare, unported castings. All of our TFS heads are fully CNC ported.
http://www.totalengineairflow.com/pr...gmhead/tfsls1/
We have these castings in stock and can ship them in just a few days.
Some pics of bare, unported castings. All of our TFS heads are fully CNC ported.