What Heads To Go With? Need MORE TQ
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What Heads To Go With? Need MORE TQ I have done some research and have come to a conclusion that maybe some Stage 2 243 casting LS6 heads would do me good. I need to gain some low end tq. My Hp/TQ numbers with my cam are in my sig.. Again i want to get some low end tq back. With this cam i have a DCR of 8.2. I was thinking when i do a head swap get some thinnner head gasket to raise the DCR up a couple of points.
So what else could benefit me?
Thanks
So what else could benefit me?
Thanks
+1 for AFR 205's. Those heads by design will produce more torque and throttle response than a ported stock casting. The smaller runners have greater velocity at all lifts when compared to a 220-230 cc ported head.
If your budget doesn't allow for that, I'd look for the best flowing 5.3 heads with the smallest possible port, before looking at LS6 style heads.
If your budget doesn't allow for that, I'd look for the best flowing 5.3 heads with the smallest possible port, before looking at LS6 style heads.
My vote is for the ETP/RHS heads. With a unported Fast 90 & ported LS2 TB on my cousins Corvette with the 225cc heads, made 444.97 RWHP(0.97 correction factor) & 405.74 RWTQ SAE corrected (would have uploaded a zip file of this but it was to big). The cam in the car was a 238/238, 112+4, .578"/.578" lift w/Jesel shaft mounts, and stock 93k bottom end. He had 1 3/4" primary headers, Kook's 3" X-pipe w/cats, and TPIS cat back exhuast. The stock rods didn't live to long after the upgrades. 
Here is his new 402 stroker with the same heads, intake (ported now), TB, X-pipe, and TPIS cat back: https://ls1tech.com/forums/dynamometer-results-comparisons/869674-our-latest-403-532-rwhp-491-tq.html
Here is his new 402 stroker with the same heads, intake (ported now), TB, X-pipe, and TPIS cat back: https://ls1tech.com/forums/dynamometer-results-comparisons/869674-our-latest-403-532-rwhp-491-tq.html Thread Starter
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Thread Starter
TECH Senior Member
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From: Chicago
+1 for AFR 205's. Those heads by design will produce more torque and throttle response than a ported stock casting. The smaller runners have greater velocity at all lifts when compared to a 220-230 cc ported head.
If your budget doesn't allow for that, I'd look for the best flowing 5.3 heads with the smallest possible port, before looking at LS6 style heads.
If your budget doesn't allow for that, I'd look for the best flowing 5.3 heads with the smallest possible port, before looking at LS6 style heads.
I ahve talked to you a lot in the past so i trust ya... Just need to raise my DCR and get soem TQ back
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AFR=$2300 and 205cc intake runner (like a stock LS1 head). Sounds like the cheapest fix might be to bump up your compression by running a thinner gasket and fly cutting if necessary to get ur DCR in the 8.7 range. Don't be intimidated by flycutting. There are several on here who i am sure will loan/rent you a tool and walk you through it.
On second thought, PRC (TSP) will mill your heads to desired level and recess the valves if necessary to run that cam or bigger w/o flycutting just to give you another option. AFR's have better ptv clearance than stock to help you clear and if $$$ is no object might make you the most power. You will need to mill these down to 59 or 60 cc chamber to reach your desired SCR but i believe it is no problem with a cam of your size. Just some things to think about. Let us know what you decide!!
On second thought, PRC (TSP) will mill your heads to desired level and recess the valves if necessary to run that cam or bigger w/o flycutting just to give you another option. AFR's have better ptv clearance than stock to help you clear and if $$$ is no object might make you the most power. You will need to mill these down to 59 or 60 cc chamber to reach your desired SCR but i believe it is no problem with a cam of your size. Just some things to think about. Let us know what you decide!!
Last edited by SOMbitch; Mar 9, 2008 at 09:46 PM.
I would go with the Trick Flows if I was going with heads, I'm not a very big fan of AFR but a lot of people are and I myself have been saving to go with Trick Flows heads. But more compression will also give more TQ as has been said, a thinner head gasket with your stock heads or a decked set of heads would gain TQ also as been said above.
With the camshaft you've selected you definately have some room for decking & extra compression. I'd look to something with smaller runners to help out the torque a little bit. We sell the PRC Stage 2.5 5.3l heads with approx. 220cc runners. For someone wanting a awesome value head with big power output these are hard to beat! We can deck the cylinder heads for extra compression & you can add a thinner gasket for better quench/compression!
http://www.texas-speed.com/shop/item...id=84&catid=40
http://www.texas-speed.com/shop/item...id=84&catid=40
__________________
Jason
Co-Owner, Texas Speed & Performance, Ltd.
2005 Twin Turbo C6
404cid Stroker, 67mm Twins
994rwhp/902lb ft @ 22 psi (mustang dyno) www.Texas-Speed.com
Jason
Co-Owner, Texas Speed & Performance, Ltd.
2005 Twin Turbo C6
404cid Stroker, 67mm Twins
994rwhp/902lb ft @ 22 psi (mustang dyno) www.Texas-Speed.com
I have done some research and have come to a conclusion that maybe some Stage 2 243 casting LS6 heads would do me good. I need to gain some low end tq. My Hp/TQ numbers with my cam are in my sig.. Again i want to get some low end tq back. With this cam i have a DCR of 8.2. I was thinking when i do a head swap get some thinnner head gasket to raise the DCR up a couple of points.
So what else could benefit me?
Thanks
So what else could benefit me?
Thanks
On The Tree
Joined: May 2006
Posts: 108
Likes: 0
I've got the same cam as you except mines a 110+1. I've been wanting to get some heads also but ended up getting some new CCW's instead. Whenever I do they'll probably be AFR 205's or some Trickflows. I know the AFR's would really help down lower in the powerband where you could take advantage of it in everyday driving, Trickflows probably would too but would cost a little more in the end. I'm curious to see what your final results would be with either of these heads.
Here is some info for you jonas....
http://www.ls1speed.com/artwork/flow/afr1510.jpg
http://www.ls1speed.com/artwork/flow/3060T001-C01.jpg
http://www.ls1speed.com/artwork/flow/PAT2029.jpg
I would save for a set of trickflows, but if money "is" an object to your new daddy azz, then go with the patriots IMHO!
http://www.ls1speed.com/artwork/flow/afr1510.jpg
http://www.ls1speed.com/artwork/flow/3060T001-C01.jpg
http://www.ls1speed.com/artwork/flow/PAT2029.jpg
I would save for a set of trickflows, but if money "is" an object to your new daddy azz, then go with the patriots IMHO!
Thread Starter
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With the camshaft you've selected you definately have some room for decking & extra compression. I'd look to something with smaller runners to help out the torque a little bit. We sell the PRC Stage 2.5 5.3l heads with approx. 220cc runners. For someone wanting a awesome value head with big power output these are hard to beat! We can deck the cylinder heads for extra compression & you can add a thinner gasket for better quench/compression!
http://www.texas-speed.com/shop/item...id=84&catid=40
http://www.texas-speed.com/shop/item...id=84&catid=40
Aren't the 220cc runners a little too big for my stock cubin inch motor? Is decking and milling the same thing? If i were to do that, and i went with .040 head gaskets what SCR and DCR am i looking at?
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yes i will, but i also need to get a 9"
if you go from the stock 66.6x cc combustion chamber and stock gaskets to a 64cc head (like the stock ls6 heads are) and use an .040 gasket your dcr will be around 8.8 if your cam is exactly what it says it is but alot of times the comp cams are slightly bigger than they say they are so you should be ok on 93. it's always a good idea to check but i would think that cam should easily clear without flycutting on unmilled or slightly milled heads. you should be around 395-405 rwtq with the bump in dcr and better heads.
Thread Starter
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From: Chicago
if you go from the stock 66.6x cc combustion chamber and stock gaskets to a 64cc head (like the stock ls6 heads are) and use an .040 gasket your dcr will be around 8.8 if your cam is exactly what it says it is but alot of times the comp cams are slightly bigger than they say they are so you should be ok on 93. it's always a good idea to check but i would think that cam should easily clear without flycutting on unmilled or slightly milled heads. you should be around 395-405 rwtq with the bump in dcr and better heads.