Comp QXI Lobes

General engine tech -- Drag Racing to Circle Track

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Orr89rocz
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Re: Comp QXI Lobes

Post by Orr89rocz » Wed Mar 14, 2018 12:33 pm

Imo its the valve motion. Faster lobe faster valve motion

CGT
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Re: Comp QXI Lobes

Post by CGT » Wed Mar 14, 2018 12:35 pm

Orr89rocz wrote:
Wed Mar 14, 2018 12:33 pm
Imo its the valve motion. Faster lobe faster valve motion
So, valves hitting seats?

Orr89rocz
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Re: Comp QXI Lobes

Post by Orr89rocz » Wed Mar 14, 2018 1:55 pm

Its everything. Lifter sliding thru bore faster, valvespring compressing faster, etc it just has a different sound i think. Not sure if the seating velocity is changing, and i hope its not too much or else it could be hammering the seats harder

groberts101
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Re: Comp QXI Lobes

Post by groberts101 » Wed Mar 14, 2018 2:15 pm

Orr89rocz wrote:
Wed Mar 14, 2018 1:55 pm
Its everything. Lifter sliding thru bore faster, valvespring compressing faster, etc it just has a different sound i think. Not sure if the seating velocity is changing, and i hope its not too much or else it could be hammering the seats harder
I concur. Depending on how aggressive the lobes are to begin with.. when only changing rocker ratio from stock 1.5 to 1.8 ratios can generate a BUNCH more sound.

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