CLASS RACER FORUM - View Single Post - 335 HP 396 290 Head Casting Build & Dyno Test

Jeff Stout · 05-18-2024, 11:37 PM

I have had 3 sets of 290 heads on s/s. The best set had bottom of exhaust brazed in and made flat. The intake as high as it could before going thru roof. Kept spring rate 300 or better closed. Under 300 I would lose 1 or more MPH.

05-18-2024, 11:37 PM	#2
Jeff Stout VIP Member Join Date: Dec 2001 Location: phoenix Posts: 1,486 Likes: 66 Liked 704 Times in 281 Posts	Re: 335 HP 396 290 Head Casting Build & Dyno Test I have had 3 sets of 290 heads on s/s. The best set had bottom of exhaust brazed in and made flat. The intake as high as it could before going thru roof. Kept spring rate 300 or better closed. Under 300 I would lose 1 or more MPH.