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Discussion Starter #1
Still working out some details on my small block build up.

For pump gas in a street driven car is 9:1 compression too low for a perforamnce build?

If I can still meet my HP goals with flow, cam etc are there any downsides to driving 400-450 horses out of a 351 stroker with 9:1?

Feedback and opinions welcomed :)
 

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Contributing Sr Motorhead
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I use pump mid-grade with my 9.4:1 393W, only because I have hyper-cast pistons and am afraid of any detonation...

64cc Ported World Windsor Senior iron heads (bought used for $400), Harland Sharp 1.7:1 roller rockers, cast crank, stock rods, 22cc dish hyper pistons. Comp cams XR-276RF-HR retrofit hydraulic roller cam, Summit 'Stage 2' intake (Performer RPM clone), 660cfm Holly Street Avenger for street, 770 Street Avenger for racing. MSD 6 triggered by Ford Duraspark distributor. Shorty headers, 2-1/2" pipe to muffs, 2-1/4" tails. Wide-ratio AOD and 2400-2600 stall converter w/ lockup and only 3.55 rear gears.

I'm getting ~480-490hp (calculated) at the crank and right around 400hp (demonstrated by ET/mph) to the ground. That's 4200 pounds of car and driver, going 13.06 @ 106.85.

 
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