Trying to decide on future motor build
Alright this isn't anything I'm doing right now but once I make my decision I will start piecing it together. I plan on staying supercharged since my head unit will go as far as I ever plan on taking it. So here is what I'm trying to decide on.
Do I want to stay 302 based since all my accessories will work with it. Go with a 331 or 363 port my heads, intake and raise the boost a little. Or Go 351 based with either a 408 or a 427. In this case I would need different heads, intake, headers but I would make more power on less boost and more torque. I can always sell my old setup to make up for the cost of the new heads and intake. Opinions are welcome. I'm just undecided and keep going back and forth on this. I want to start buying parts here in the next couple months. It will not be a fast build since I'm in no big hurry. |
Boost technology has come to a point where the big inch Windsors aren't really needed, unless you're looking for the baddest of the bad. My favorite combo has always been the 331 (more favorable rod angle), and built right, with a little boost, would be all I would ever need in a lightweight Fox.
And on that note, I need a Fox I can modify, damn it! I love my '82, but it's entirely too original to start cutting up. |
I would go the 351 route since the factory block is stronger. Assuming you are not going to buy a dart block. But if you are then hands down go with a 347 ci 3.25 stroke 4.125 bore.
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Dart blocked 363 with a Brooks kit. If you're going to do it, go big.
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If you already have a good aftermarket or R block, then its hard to justify the swap to a 351 based motor. If starting from scratch there is ZERO reason other than class racing to stay 302 based. If you have a good block, I vote 363 with an 88mm minimum. If you go 351 I vote 427+ci with twin billet 76's Orrrrrrrr ERL 427, LS based, twin 7675s |
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I'd do a 427-454 stroker 9.5 decked Dart. You will want new heads and intake manifold with any sized motor you go with. FYI, besides the headers/and a/c bracket (you already have a cowl hood), its $100 bucks more to build a 9.5 vs a 8.2 (what my dad was quoted)... All things equal is about 80-100rw difference. (454 vs 363 for instance), not to mention the monster torque differences. |
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