Heads/Valves question
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From: Fort Worth, TX
Heads/Valves question I've been searching and searching, but I can't seem to find what i'm looking for. I'm torn between sizes of valves/flows/power for different combos.
Which in all your opinions do you think will make the most power, keeping in mind I'll need some lower end trq. So basically, give me the fastest car.
I have the following MODs,
FAST 90/90
3.73's
Volant CAI
SLP 85mm MAF
Which would be some better heads with......
Stock Valve sizes that flow close to 300 (290-295) cfm at .6 lift? Which would be the most lift these heads can manage before a loss in flow. (TEA's new Stage 1 LS1 head)
Or 2.055/1.57 valves on a ARE Stage 3 LS6 style head? Not sure what they flow, but i'm sure they flow more then TEA's stage 1.
Which set of heads with the right cam would give me the most power under the curve? Cause thats where the power matters right? What are some of the combos that you guys have out there that are making 430+ hp on stock LS1 N/A?
Which in all your opinions do you think will make the most power, keeping in mind I'll need some lower end trq. So basically, give me the fastest car.
I have the following MODs,
FAST 90/90
3.73's
Volant CAI
SLP 85mm MAF
Which would be some better heads with......
Stock Valve sizes that flow close to 300 (290-295) cfm at .6 lift? Which would be the most lift these heads can manage before a loss in flow. (TEA's new Stage 1 LS1 head)
Or 2.055/1.57 valves on a ARE Stage 3 LS6 style head? Not sure what they flow, but i'm sure they flow more then TEA's stage 1.
Which set of heads with the right cam would give me the most power under the curve? Cause thats where the power matters right? What are some of the combos that you guys have out there that are making 430+ hp on stock LS1 N/A?
Thread Starter
TECH Addict
iTrader: (24)
Joined: May 2005
Posts: 2,045
Likes: 4
From: Fort Worth, TX
OK, how about this, which would be the best size valves for the most power on a stock 346 CI motor?
Stock Valve sizes (2.00/1.something) Heads flowing intake ~295cfm at .6 lift
2.02/1.57 heads flowing intake ~300cfm at .6 lift
2.055/1.57-1.6 heads flowing intake ~310-315cfm at .6 lift
Which combo has the potential to make the most power with the right cam on a stock LS1 with the before mentioned mods?
Would stock valves be better cause I can fit say a T-Rex or MS3 cause they make 450hp on stock LS1 heads that only flow ~245 at .6 lift? Or would a smaller cam on the larger more flowing valves be better? Need some advice from the pros here!
Thanks,
Adrian
Stock Valve sizes (2.00/1.something) Heads flowing intake ~295cfm at .6 lift
2.02/1.57 heads flowing intake ~300cfm at .6 lift
2.055/1.57-1.6 heads flowing intake ~310-315cfm at .6 lift
Which combo has the potential to make the most power with the right cam on a stock LS1 with the before mentioned mods?
Would stock valves be better cause I can fit say a T-Rex or MS3 cause they make 450hp on stock LS1 heads that only flow ~245 at .6 lift? Or would a smaller cam on the larger more flowing valves be better? Need some advice from the pros here!
Thanks,
Adrian
I'm interested in this as well. Is bigger always better when it comes to the size of the valves? What are the advantages/disadvantages of bigger valves and how do you match heads to a cam or vice versa?
Larger valves are better for increased flow, however you've got to worry about shrouding the valves depending on the size of your cylinder bore. Obviously you want the head that flows the best in the area where the cam is supposed to make most of its power. You don't pick a cam based on your heads. You pick a cam based on the RPM range where you want your power, and pick heads that maximize its efficiency/power in these areas.
