how will GTP stage 3's work on my combo?
10-25-2002, 05:05 PM
#1
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how will GTP stage 3's work on my combo? got a 98 stock cube LS1. T1 cam, LS6 intake, FLP's. i was told they are 11.7 comp ratio w/ 2.05/1.60 valves. i currently dyno 380hp/373tq. i also roadrace, not drag race. it is a really good deal on the heads, but i guess not if they hurt more than help.
give me your feedback.
give me your feedback.
10-25-2002, 05:10 PM
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Re: how will GTP stage 3's work on my combo? Might be some overkill, but I haven't seen any numbers of stg 3 heads on stock cubes. If your sprayin' it might work. Not real sure though.
10-25-2002, 05:14 PM
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Re: how will GTP stage 3's work on my combo? Glenn, i would say cam would play more into your area than heads.. in road racing you want a fairly flat tq and hp curve.. heads would increase the RPM range at which this happens.. for road racing you don't want a peaky power curve.. this creates a lot more throttle modulation and playing with the power on entry or exit.. i would say how does your car perform now with its current power? where could you use more power.. mid range upper RPM's? answers to these questions will give you more of an idea on where you want or need more power.. if your not that serious about road racing and just want the power go for the heads if they are at that good of a price.. keep in mind Stage 3 are more for bigger cubes and higher RPM which a stock bottom end doesn't provide.. so you will give up some low and mid range with the higher flowing heads.. butif your planning on a stroker in the future can't hurt to buy em.. hell Give Craig a call and ask his advise.. he knows road racing too!! <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
Wes
Wes
10-25-2002, 05:15 PM
#4
Re: how will GTP stage 3's work on my combo? Found this on Thunder Racings Website about GTP Stages.
GTP / Thunder Racing STAGE 1 Cylinder Heads, stock valves, assembled with single coil valve springs designed for NO MORE than .500 lift camshafts and stock retainers ($500 CORE CHARGE)
$1,499.99
99-GTPS2-S GTP / Thunder Racing STAGE 2 Cylinder Heads, 2.020 / 1.570 Valves, assembled with single coil valve springs and titanium retainers ($500 CORE CHARGE)
$2,399.99
99-GTP-S2-D GTP / Thunder Racing STAGE 2 Cylinder Heads, 2.020 / 1.570 Valves, assembled with dual coil valve springs and titanium retainers ($500 CORE CHARGE) View Dyno Graph
$2,899.99
99-GTP-S3 GTP / Thunder Racing STAGE 3 Cylinder Heads, Minimum 4.00 Bore required, 2.055 / 1.570 Valves, assembled with single coil valve springs and titanium retainers ($500 CORE CHARGE)
$2,899.99
99-GTP-S3-D GTP / Thunder Racing STAGE 3 Cylinder Heads, Minimum 4.00 Bore required, 2.055 / 1.570 Valves, assembled with dual coil valve springs and titanium retainers ($500 CORE CHARGE)
$3,399.99
GTP / Thunder Racing STAGE 1 Cylinder Heads, stock valves, assembled with single coil valve springs designed for NO MORE than .500 lift camshafts and stock retainers ($500 CORE CHARGE)
$1,499.99
99-GTPS2-S GTP / Thunder Racing STAGE 2 Cylinder Heads, 2.020 / 1.570 Valves, assembled with single coil valve springs and titanium retainers ($500 CORE CHARGE)
$2,399.99
99-GTP-S2-D GTP / Thunder Racing STAGE 2 Cylinder Heads, 2.020 / 1.570 Valves, assembled with dual coil valve springs and titanium retainers ($500 CORE CHARGE) View Dyno Graph
$2,899.99
99-GTP-S3 GTP / Thunder Racing STAGE 3 Cylinder Heads, Minimum 4.00 Bore required, 2.055 / 1.570 Valves, assembled with single coil valve springs and titanium retainers ($500 CORE CHARGE)
$2,899.99
99-GTP-S3-D GTP / Thunder Racing STAGE 3 Cylinder Heads, Minimum 4.00 Bore required, 2.055 / 1.570 Valves, assembled with dual coil valve springs and titanium retainers ($500 CORE CHARGE)
$3,399.99
10-25-2002, 05:17 PM
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Re: how will GTP stage 3's work on my combo? The stage 3's are generally for bigger cubed motors. The 382 bores and above would benefit from the stage 3's. I don't think I'd want to put them on a stock bore.
10-25-2002, 09:32 PM
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Re: how will GTP stage 3's work on my combo? Right, Stage 3 is too large for a 346. Your velocity just wouldn't be as good as if you had a Stage II+ setup (310-320cfm intake and 220+ exhaust) using a 2.02/1.57 valve combination.
