GM 12626958-LSA heads

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Jan 29, 2011 | 10:49 AM

#21

68 SS

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From: Tennessee

Very very close to the same flow numbers that is why I decided to give the a try seems everyone talks about them but I can't find anyone trying to make big numbers with them. I hope to be north of 1000whp with them I did have WCCH cut them for 1/2'' studs.

Jan 29, 2011 | 11:32 AM

#22

Josh@PremierAutosports

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From: Memphis

Quote:

Originally Posted by 1SlowHoe

I don't know ....yet

I'm putting mine on a 408 (10.4:1CR) in my Tahoe. Topping it off with a TVS2300. Hoping for 12-15psi. We will see what I can do with my less than boost perfect CR. Meth injection is already in the garage if needed.

On a TVS2300 I would keep compression at least 10:1 so your 10:4 it great. We max those blowers and use compression to get all the power out of the 2300. I would also suggest running a cog on the rear of the blower and a 8 rib on the front drive along with straight meth. I run 16psi on my stock internal LSA except for a camshaft even with stock head bolts. If your track reopens I will get some heads from Richard and use ARP studs. My CTS-V made 685whp through a auto and loves it.

Jan 29, 2011 | 12:47 PM

#23

1SlowHoe

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From: Orlando

No cogs for me. I can't justify the extra $1000 for a jack shaft model for my truck. I will most likely go 8 rib up front. I figure if I really need more power I can use the $1000 I saved to spray a small shot through the blower

Have you tuned a 408/2300 combo? Do you remember the numbers?

Jan 29, 2011 | 04:31 PM

#24

rotary1307cc

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Quote:

Originally Posted by 68 SS

Good luck Dave!

Will be interesting to see your results

one thing about the fin is even though it will restrict flow it should help with detonation and keep the air charge away from the cylinder walls

Mar 23, 2011 | 09:00 PM

#25

68 SS

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From: Tennessee

Well I have my heads back from WCCH and wow they look awsome just waiting on my short block from AES to arrive then we will see what happens! Links below of the awsome WCCH port work!! Enjoy!

http://i1206.photobucket.com/albums/...7/P2260044.jpg
http://i1206.photobucket.com/albums/...7/P2260043.jpg
http://i1206.photobucket.com/albums/...7/P2260042.jpg
http://i1206.photobucket.com/albums/...7/P2260041.jpg
http://i1206.photobucket.com/albums/...7/P2260039.jpg

Mar 23, 2011 | 11:43 PM

#26

Beaflag VonRathburg

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From: Jax Beach, Florida

The finish work on those heads is very nice.

Mar 24, 2011 | 02:21 AM

#27

sherm6998

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From: Washington State

Those are beautiful!

Mar 24, 2011 | 06:03 PM

#28

rotary1307cc

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Richard does great work!

You will like them Dave, i have my set of them up and running and they are nasty

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Mar 24, 2011 | 08:31 PM

#29

68 SS

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From: Tennessee

I have to say if the rest of the build looks like the heads it will be awesome! I am very happy with the heads they came out way better than other CNC jobs I have seen and Richard is second to none when it comes to customer service!

Mar 24, 2011 | 09:23 PM

#30

1SlowHoe

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From: Orlando

Richard did my LSA heads as well. Very nice. He also ported the lower manifold on my blower

BEFORE:

AFTER:

Top notch customer service too!

Mar 24, 2011 | 09:29 PM

#31

99bluefirebird

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Looks like these heads are about $750-950 complete from GM for the pair.
The WCCH ported ones are $2000. Isn't that comparable to mast/TFS/AFR heads?

Mar 24, 2011 | 11:12 PM

#32

68 SS

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From: Tennessee

I sent my LSA heads to WCCH the port work is quite reasonable for the finished product I also had mine cut for 1/2'' studs. I believe these will be able to take all I can give them they are cast from a much better material than other GM heads and are supposed to have a thicker deck...I intend to see just what they will take.