Power difference between 5.3 and LS6 heads
Power difference between 5.3 and LS6 heads I know the difference between the heads but what are the power differences between the TSP PRC 5.3 and TSP PRC LS6 heads?
http://www.texas-speed.com/shop/item...id=84&catid=40
http://www.texas-speed.com/shop/item...d=649&catid=40
http://www.texas-speed.com/shop/item...id=84&catid=40
http://www.texas-speed.com/shop/item...d=649&catid=40
The LS6 heads will make a little more power even in stage 1 form.... The compression bump from the 5.3' is overated IMO because after the chamber work they do they are 63cc and some change......
TECH Regular
Joined: Jan 2008
Posts: 458
Likes: 0
From: Bellaire, TX
From what I have found and read is that the LS6 heads have alittle more room to work with asfar as flow numbers go. The 5.3L heads are about max out and they still flow a hair under the stage 1 LS6 heads. As far has the compression ratio goes, you can mill the LS6 heads to the CC as the 5.3's. The 5.3L stage 2.5 heads with the same springs as the stage 1 LS6 heads run $984 for the set and for $40 more you step up to the stage 1 LS6 heads. I think it's worth the extra $40 for the LS6 heads. Just my .02 cents.
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From what I have found and read is that the LS6 heads have alittle more room to work with asfar as flow numbers go. The 5.3L heads are about max out and they still flow a hair under the stage 1 LS6 heads. As far has the compression ratio goes, you can mill the LS6 heads to the CC as the 5.3's. The 5.3L stage 2.5 heads with the same springs as the stage 1 LS6 heads run $984 for the set and for $40 more you step up to the stage 1 LS6 heads. I think it's worth the extra $40 for the LS6 heads. Just my .02 cents.
Thanks
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I went with the Stage 1 LS6 heads, and Texas Speed checks the deck surface anyways so they will mill to your desired CC (free of charge I might add). I had mine milled to 62cc's to achieve 11:1
Talk to Texas speed. I know they like to push the sale on the 5.3L stage2.5 heads. But ofcourse, its all about what setup your running. 220cc intake runner on the 5.3's is supposed to be better for lower/mid-range power. The 225's the LS6 heads have is supposed to be for upper power, from what I have read about these two heads. My $.02
Staging Lane
Joined: May 2009
Posts: 96
Likes: 1
For me it wasn't just about flow, the two are fairly close. If you run a cam with big enough lift (in my case 588), the stage1 LS6 heads don't have the right springs. Upgrading to the better dual springs makes the price tag much heftier and to me the better bang for the buck will be stage II 5.3's.
My 5.3's will be for sale in about 6 weeks if any body is interested. 30K on them so they will need springs. $500 plus shipping. Anybody interested PM me and I will contact you when they come off.....
Trust me on this as I'm in a situation currently where I need to get my money back from the seller for the 5.3 heads I bought.
For me it wasn't just about flow, the two are fairly close. If you run a cam with big enough lift (in my case 588), the stage1 LS6 heads don't have the right springs. Upgrading to the better dual springs makes the price tag much heftier and to me the better bang for the buck will be stage II 5.3's.
Combustion Chamber: 64cc
Intake Runner: 227cc
Exhaust Runner: 70cc
Intake Valve: 2.02"
Exhaust Valve: 1.57"
Max. Valve Spring Lift: 0.650"
Spring Pressure Closed: 135 lbs. @ 1.800"
Spring Pressure Open: 375 lbs. @ 1.090"
Retainer Material: Titanium
Valve Seal Material: Viton
Valve Guide Material: Manganese Bronze
Valve Job: 5-angle
Well I decided to go with the Patriot LS6 heads.
Combustion Chamber: 64cc
Intake Runner: 227cc
Exhaust Runner: 70cc
Intake Valve: 2.02"
Exhaust Valve: 1.57"
Max. Valve Spring Lift: 0.650"
Spring Pressure Closed: 135 lbs. @ 1.800"
Spring Pressure Open: 375 lbs. @ 1.090"
Retainer Material: Titanium
Valve Seal Material: Viton
Valve Guide Material: Manganese Bronze
Valve Job: 5-angle
Combustion Chamber: 64cc
Intake Runner: 227cc
Exhaust Runner: 70cc
Intake Valve: 2.02"
Exhaust Valve: 1.57"
Max. Valve Spring Lift: 0.650"
Spring Pressure Closed: 135 lbs. @ 1.800"
Spring Pressure Open: 375 lbs. @ 1.090"
Retainer Material: Titanium
Valve Seal Material: Viton
Valve Guide Material: Manganese Bronze
Valve Job: 5-angle
Originally Posted by JohnnyBz28
Search failed. That is the first thing I try before making any threads.