Should I sell my 347 and go for 393 windsor?

trctrdrvr · #1 (**permalink**) 11-09-2006, 06:03 AM

This should help you with notching you're block, I've been thinking of doing the same thing

Mike

http://cgi.ebay.com/ebaymotors/Ford-...46573530QQrdZ1

hi-tech cobra · #2 (**permalink**) 11-09-2006, 09:17 AM

Thanks Mike...just ordered it.

Philm · #3 (**permalink**) 11-15-2006, 03:58 AM

I have built a new small block engine for my cobra. I started with a new 302 dart block with the 4.125 bore. Stroked it with a forged crank, rods and pistons. Solid roller cam, dart pro heads and an aussie made 8 throttle body efi system. I have a Motec M48 running the thing and i could not be happier with the engine.

It is very well behaved on the street, my wife actually drives and races it more than I do.

I had it on the dyno today for a check up and to tweak a few things, the engine had 410RWHP at 6500rpm and a torque curve that flatlined straight away at 350 Foot pounds. We can get more out of it but I don't really have to.

For the weight of the car the power is a little over the top, but I am sure I will get use to it.

For me you cannot beat a stroked 302 windsor.

Phil

hi-tech cobra · #4 (**permalink**) 11-15-2006, 11:05 AM

Phil, thanks for the post. I saw your gallery...great looking motor! I just read an article in 5.0 magazine. They did the same 4.125 overbore on an 'R' block. The article stated the larger bore and longer piston skirt would eliminate the piston rock problem regular 347's have.
I am weighing my options now, and considering going with a similar setup-maybe the new Ford 302 boss block. Friends are telling me it's overkill. What do you think?

Philm · #5 (**permalink**) 11-16-2006, 05:40 AM

The new aftermarket blocks are so much better than any ford production block. The relatively low cost make them very attractive.

We have receintly seen a 302 windsor split completely in half. The motor was only a few hours old after a complete rebuild which included a stroker kit. Warren now runs an SVO block and has had no problems.

It all depends on your budget, I would go for a dart block or similar as when pushing the limits on power you will know that the block will not let you down.

Good Luck

Phil

RRD · #6 (**permalink**) 11-17-2006, 02:36 PM

it sort of depends whether you believe low end torque is your buddy, or not.

rrd

Streetwize · #7 (**permalink**) 11-18-2006, 06:41 AM

IMO, the big block style torque combined with the lightness of an aluminum head small block is the best of both worlds...you just don't want or need to get "silly" with the combo, it doesn't need a huge cam or super high comprersssion to get it done. A 470-510 hp 408-427 can be built with a good set of heads that flow about ~275cfm on the intakes, 1 7/8" headers and a cam in the mid 230's @.050 in a solid 9.5-10.5:1 shortblock will idle at 850rpm, make massive torque and pull cleanly to about 6200, plenty for a dual purpose motor and you'll have rock solid reliability for a driver.

So you can easily match or exceed the power of an original Street 427 and still have a docile and reliable motor that weighs about the same as an original all-iron 289...Though I love the revs of a 7500 plus smaller cube motor, I love the Thrust of that low end grunt that 427 cubes gives you at any RPM even more; to get that massive "no effort" acceleration combined with the better-balanced handling and braking of a smallblock is really tough to beat IMO.

Woodz428 · #8 (**permalink**) 11-19-2006, 02:50 PM

You asked about larger, but I'd say smaller with that combo. The 331engine that Clois mentioned has a better rod angle and has less thrust on the cylinder wall, which is pretty important in a stock block. The Boss block you mentioned is a good upgrade if you choose to stay at 347, however, in the crate engines that Ford will offer in that configuration they are only offering( at least initially)a 331 max size. It is supposed to be 500hp, if I recall. So while I do like the small block, I think durability will be less than with a 331.

olddog · #9 (**permalink**) 11-19-2006, 07:37 PM

Quote:

Originally Posted by Streetwize

to get that massive "no effort" acceleration combined with the better-balanced handling and braking of a smallblock is really tough to beat IMO.

Not to hijack this thread, but I asked this very question a while back. No one really stepped up and claimed the lighter weight of a SB impoved handling enough that you could tell a differance. Most stated that the biggest factor is the driver, yea I get that, but what about the capability of the car? Would you care to elaborate? I am interested. I'll Start a new thread, so not to mess this one up any further.