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Seems relatively reasonable for a 8.5:1 build. A CR that low (even with heads and cam) is going to be significantly lower in power than a comparable build with a higher compression ratio. A ZZ4 crate runs around 355HP / 425TQ at a CR of 10:1. This factors in no drivetrain at all, this is BHP at the crank. Now drop the compression by 1.5 points and that number drops drastically. You gain a tiny bit back with heads and cam, but your major gains would come from boost (effectively increasing the compression ratio).

At any rate, a dyno is great tool for measuring gains to compare before and after mods. Most numbers do differ from dyno to dyno by at least a certain percentage. Also varies by dyno manufacturer. A mustang dyno will always read lower than a comparable dynojet.

Hard to tell from your pictures, but that appears to possibly be a Dyno Dynamics brand machine. They usually fall somewhere in the middle based on my experiences.

Hope that helps..........

<blockquote data-quote="CableGuy" data-source="post: 220446" data-attributes="member: 287">Seems relatively reasonable for a 8.5:1 build.&nbsp; A CR that low (even with heads and cam) is going to be significantly lower in power than a comparable build with a higher compression ratio.&nbsp; A ZZ4 crate runs around 355HP / 425TQ at a CR of 10:1.&nbsp; This factors in no drivetrain at all, this is BHP at the crank.&nbsp; Now drop the compression by 1.5 points and that number drops drastically.&nbsp; You gain a tiny bit back with heads and cam, but your major gains would come from boost (effectively increasing the compression ratio).At any rate, a dyno is great tool for measuring gains to compare before and after mods.&nbsp; Most numbers do differ from dyno to dyno by at least a certain percentage.&nbsp; Also varies by dyno manufacturer.&nbsp; A mustang dyno will always read lower than a comparable dynojet.Hard to tell from your pictures, but that appears to possibly be a Dyno Dynamics brand machine.&nbsp;&nbsp; They usually fall somewhere in the middle based on my experiences.Hope that helps..........</blockquote>

[QUOTE="CableGuy, post: 220446, member: 287"] Seems relatively reasonable for a 8.5:1 build. A CR that low (even with heads and cam) is going to be significantly lower in power than a comparable build with a higher compression ratio. A ZZ4 crate runs around 355HP / 425TQ at a CR of 10:1. This factors in no drivetrain at all, this is BHP at the crank. Now drop the compression by 1.5 points and that number drops drastically. You gain a tiny bit back with heads and cam, but your major gains would come from boost (effectively increasing the compression ratio). At any rate, a dyno is great tool for measuring gains to compare before and after mods. Most numbers do differ from dyno to dyno by at least a certain percentage. Also varies by dyno manufacturer. A mustang dyno will always read lower than a comparable dynojet. Hard to tell from your pictures, but that appears to possibly be a Dyno Dynamics brand machine. They usually fall somewhere in the middle based on my experiences. Hope that helps.......... [/QUOTE]

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