331 build plan questions
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From: Where the Army sends me
331 build plan questions
I am a regular on the 80-86 forum, but I have a couple of questions for the small block experts here.
I am planning a full custom 331ci build for a fuel injected engine based in the ATK 331 short block. This block has the stroker kit installed and the cam bearings as well. I plan on using a Billet Specialties serpentine kit for the front end as that includes a new front cover and water pump. I want to use Trick Flow Specialties cylinder heads. I have found an OBDII compatible EFI kit that gives the engine an old school look, mainly by using a carb-style throttle body and round air cleaner.
My goal is to hit 400ft-lbs of torque between 3000 and 4000 RPM. My question are what size chambers and valves do I need to get on my heads to reach this number? And what camshaft and timing set will bring out the torque this low? TFS offers a top end kit that should get me to 400, but at 4500 rpm. I would like the peak point moved down in the rpm band. I want to avoid having to spin past 5500.
Any other suggestions are welcome.
Thanks
I am planning a full custom 331ci build for a fuel injected engine based in the ATK 331 short block. This block has the stroker kit installed and the cam bearings as well. I plan on using a Billet Specialties serpentine kit for the front end as that includes a new front cover and water pump. I want to use Trick Flow Specialties cylinder heads. I have found an OBDII compatible EFI kit that gives the engine an old school look, mainly by using a carb-style throttle body and round air cleaner.
My goal is to hit 400ft-lbs of torque between 3000 and 4000 RPM. My question are what size chambers and valves do I need to get on my heads to reach this number? And what camshaft and timing set will bring out the torque this low? TFS offers a top end kit that should get me to 400, but at 4500 rpm. I would like the peak point moved down in the rpm band. I want to avoid having to spin past 5500.
Any other suggestions are welcome.
Thanks
Hotshot
Joined: May 2003
Posts: 11,141
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From: south louisiana
I know this may not relate to your efi build but the 331 I have has a very broad powerband from 1500-6500. This is built around an Eagle 331 kit with SRP flat tops, 10.4 to 1 comp ratio with Canfield heads that were the equivalent of ARP 165 heads (1.94/1.6 valves) with 57 cc chambers. The cam is a Ford Z303 run with 1.7 rockers (.587 lift, 228* @ .050). I've never dynoed it but it makes tons of torque all though the rpm range listed with a dual plane 3x2 carb setup.
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From: Where the Army sends me
Baddad- not a bad plan. I was considering the Trick Flow 179 twisted wedge heads and want to keep compression down to about 9.5. Pump 84-86 octane.
I did email Stroker John Nijssen about my ideas to get some feedback from a stroker engine expert. He suggested trying to squeeze a 434 (351W block) in there. Since the bay is designed to accept either a DOHC I4 or SOHC V6, it might fit. Good news in that area is that I have to custom fab the engine mounts anyway, and I can lower as necessary. I might have to with the ZF anyway.
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From: Where the Army sends me
I just rebuilt the 400 in the F250, so no plans to change that anytime soon. When I do, it will get a built 460. Or another TMeyer 400.
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