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Author
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Topic: Again 393 vs 408
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Kellxr7
Gearhead Posts: 679
From: Canada
Registered: Mar 2003
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posted 12-26-2003 03:04 PM
   
It seems to cost quite a bit more to build a 408, so is it worth the money vs a 393? how much more hp & torque -approx-, is a 408 over a 393? if its only something like 20 horses I wouldnt waste my cash, if its more, I would consider it. How about longevity on a 408? same thing?(if balanced correctly etc)
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kid vishus
Gearhead Posts: 6395
From: middle of NC
Registered: Oct 2000
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posted 12-26-2003 03:22 PM
Not sure about HP totals or longevity differences, but I remember reading an article in an old Super Ford mag that talked about strokers. It claimed that for every inch you added by stroking a motor, you added roughly 1 ft lb of torque. So in torque capability, with 2 identically prepped motors (and how often does anyone build 2 motors of different sizes then set them up identically?), you are probably looking at 15 ft lbs of torque difference. That's a substantial amount, but not enough difference that a slightly different combo couldn't overcome. Personally, I like the 393 build the best. It seems the "easier" build of the 2.
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Perk 351C
Journeyman Posts: 68
From: Cape Neddick Me USA
Registered: Sep 2003
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posted 12-26-2003 05:52 PM
Kell,Are you talking Windsor or Cleveland? In the world of Cleveland's the price seems to be real close.Perk
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Kellxr7
Gearhead Posts: 679
From: Canada
Registered: Mar 2003
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posted 12-26-2003 09:37 PM
sorry, yeah Windsor
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steve'66
Gearhead Posts: 9476
From: Sonoma,CA,USA
Registered: Mar 2000
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posted 12-26-2003 11:28 PM
Kell,The 393 is cheaper only if you use stock 5.0 pistons and stock 351w rods.  If you build the 393 and 408 with the same quality parts the cost is very close. Nothing beats cubic inches dollar for dollar. But to make h.p. you'll need good bottom end parts that can handle the rpms with the longer stroke. So.... Good parts with either stroker and the costs will be similar but the results will be slightly better with the 408w.  SteveW
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7DMACH1
Gearhead Posts: 2635
From: PHILA. PA.
Registered: Feb 2001
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posted 12-27-2003 09:28 AM
Love my 408c. ------------------
"TRAILERS ARE FOR BOATS"
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68 S-code GT
Gearhead Posts: 2958
From: Sayreville, NJ, US
Registered: Mar 2000
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posted 12-27-2003 05:35 PM
Isn?t it that if you go with the 393 with the stock size rods you will not have to do any cutting to get clearance?
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Fastymz
Moderator Posts: 20638
From: Reno Nv USA M&M#1240
Registered: Apr 2001
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posted 12-27-2003 05:46 PM
I should look into the price of a 408w too. Can a 408w block be rebored again and rebuilt again ?
------------------ SCOOP 2.26 60'S
14.9 @ 90.86MPH 65 coupe,351w,C4,Big Boss 429 hood scoop,8" 3.40 TracLoc. My Pics [This message has been edited by Fastymz (edited 12-27-2003).]
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steve'66
Gearhead Posts: 9476
From: Sonoma,CA,USA
Registered: Mar 2000
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posted 12-27-2003 10:40 PM
Yes a 408w will need more block clearancing than a 393w, but that doesn't cost anything but time. Ron, a 408w is only .030" overbored, so yes it can be bored again later. It's the stroke that is longer due to the custom crank, just like the smaller strokers. But if you go to a 408w you should be looking for Vic Jr heads and a Vic Jr intake topped with a 750-850 carb. SteveW
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V-8
Gearhead Posts: 323
From: TURKEY/Istanbul
Registered: Dec 2003
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posted 12-30-2003 07:03 AM
I'm planing to built a 408 stroker too.Where can i find it?Any web sites?
AND MOST IMRORTANT QUESTION...
Tfs twisted wedge alm heads can get enough to 408 stroker?they must be ported?
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