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Search found 332 matches

by American Thunder
Sat Mar 15, 2008 2:13 pm
Forum: 240-300 "Big Block" Six Performance
Topic: ROD BOLTS??????????????????
Replies: 11
Views: 1475

On a sidenote; Ford has always had some of the strongest grade 8 factory bolts of all manufacturers. Usually, stock fasteners are overkill. I built a cheap grenade motor for my Mustang years ago, where I used the stock 302 assembly, stock rods/bolts and all, with ported 351 heads and a solid cam. I ...
by American Thunder
Sat Mar 15, 2008 2:01 pm
Forum: 240-300 "Big Block" Six Performance
Topic: got my 1 to 2 bbl adaptor in
Replies: 20
Views: 3744

The 2bbl carb is what, about 280 cfm? That shouldnt be too big for a stock 300 I guess.
by American Thunder
Sat Mar 15, 2008 1:56 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 500CFM not ENOUGH!!!!
Replies: 30
Views: 4298

You can fix the edelbrock carb's issues easily by replacing it with a nice Holley carb. :D
by American Thunder
Sat Mar 15, 2008 1:46 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 300 swap into an 88 bronco
Replies: 3
Views: 797

The van is 2wd, I assume? So you'll have to take apart the van transmission and replace the tailshaft and housing with one from a 4wd, so that it mates up with the transfer case on the Bronc.
by American Thunder
Tue Mar 04, 2008 6:17 pm
Forum: 240-300 "Big Block" Six Performance
Topic: aluminum vs. cast iron head
Replies: 19
Views: 2422

I have zero experience with flatheads, the only one I remember seeing up close and personal was my brother's old Wildfire roadster with some kind of really built up 300hp flathead Ford V8. It overheated pretty much everytime he drove it, even with all the electric fans situated in the engine bay. Bu...
by American Thunder
Sun Mar 02, 2008 11:10 am
Forum: engine tech
Topic: The new OLD FTF gets a "Duesenberg DOHC 4-valve"
Replies: 230
Views: 96415

American Thunder wrote:To make up for unequal length intake runners, you could just make the longer runners slightly narrower and more restrictive, so that the end result is equal flow, but that would be time consuming, to say the least.

P.S. Your fabricating work is awesome.


Edit: oops, I meant shorter runners.
by American Thunder
Sat Mar 01, 2008 11:31 pm
Forum: 240-300 "Big Block" Six Performance
Topic: aluminum vs. cast iron head
Replies: 19
Views: 2422

Low speed dynamic compression is always lower than the calculated mechanical compression when using an aggressive cam, because of the valve overlap, especially with solid lifters. But once the overlap is overcome as engine speed increases, you can attain higher compression than the calculated mechan...
by American Thunder
Sat Mar 01, 2008 4:24 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Here's the 300 forged crank "casting" number.
Replies: 22
Views: 17149

Seattle Smitty wrote:What happened to whacking the crank with a big brass hammer and see if the crank rings (forged), or clunks (cast)?


You can just look at the "seam" lines, cast iron is a thin line, forged steel is a wider line.
by American Thunder
Sat Mar 01, 2008 4:23 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Here's the 300 forged crank "casting" number.
Replies: 22
Views: 17149

Fords crankshafts are tough, even the cast iron ones. :)
by American Thunder
Sat Mar 01, 2008 4:16 pm
Forum: engine tech
Topic: The new OLD FTF gets a "Duesenberg DOHC 4-valve"
Replies: 230
Views: 96415

To make up for unequal length intake runners, you could just make the longer runners slightly narrower and more restrictive, so that the end result is equal flow, but that would be time consuming, to say the least.

P.S. Your fabricating work is awesome.
by American Thunder
Sat Mar 01, 2008 4:09 pm
Forum: 240-300 "Big Block" Six Performance
Topic: starting the rebuild
Replies: 6
Views: 834

No, ARP has its own torque specs. Call them.
And make sure you oil the undersides of the bolts/integral washers and threads when you install them.
by American Thunder
Sat Mar 01, 2008 4:02 pm
Forum: 240-300 "Big Block" Six Performance
Topic: aluminum vs. cast iron head
Replies: 19
Views: 2422

It is extremely easy to get too much compression in a VW and our Ford 300's are easy to over-do it also. Just add a set of flat-top pistons and you had best do your homework to keep the thing from detonating to death. Joe I'm pretty new to the 300 world, but I have 9.5:1 figured into my planned 300...
by American Thunder
Sat Mar 01, 2008 3:34 pm
Forum: 240-300 "Big Block" Six Performance
Topic: aluminum vs. cast iron head
Replies: 19
Views: 2422

I've only been in it for about 30 years,(I'm 39) so I have less time invested than that guy, but from my experience, and my older brother's projects, both flow AND compression are important. Compression is especially important if efficiency is a big factor, such as fuel mileage setups. In forced ind...
by American Thunder
Fri Feb 29, 2008 11:45 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Easiest Carb to Tune
Replies: 19
Views: 3086

Well, Holley carbs came on several Fords from the factory, such as the 1984-1985 HO 5.0 Mustangs, with the 585 cfm Holley 4bbl. They ran for years with nothing done to them. I havent touched the BG Race Demon (virtually identical to a Holley) on my Mustang in about 6 years, other than to clean it wi...
by American Thunder
Fri Feb 29, 2008 6:20 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Easiest Carb to Tune
Replies: 19
Views: 3086

For me, Holley is by far the easiest to mess with.
by American Thunder
Fri Feb 29, 2008 6:15 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Dating Ford castings & parts.
Replies: 3
Views: 4791

On a related note, the 3rd character in the code is the type of vehicle the part was made for. I'll try to recall some from memory

T = light truck
H = heavy truck?
P = police
Z = mustang
V = Lincoln
A = full size car (I think?)
by American Thunder
Thu Feb 28, 2008 6:26 pm
Forum: 240-300 "Big Block" Six Performance
Topic: aluminum vs. cast iron head
Replies: 19
Views: 2422

In general the big gain for aluminum is less weight, and to a lesser degree, ease of modification. I agree compeletely. Plus aluminum heads are easier and cheaper to manufacture. We used to say that to get EQUIVALENT power from an aluminum head compared to cast iron the compression ratio needs to b...
by American Thunder
Thu Feb 28, 2008 6:21 pm
Forum: 240-300 "Big Block" Six Performance
Topic: aluminum vs. cast iron head
Replies: 19
Views: 2422

If I was solely after efficiency(fuel mileage) I'd use cast iron. (which I am, on my truck) For pure performance, such as my Mustang, I prefer aluminum, mostly for the weight savings. Another huge benefit of aluminum over iron is ease of repair. If you have a ton of money invested in a highly modifi...
by American Thunder
Wed Feb 27, 2008 6:39 pm
Forum: 240-300 "Big Block" Six Performance
Topic: choke question
Replies: 9
Views: 1263

The heat tube works in conjunction with the electric choke on the 70s and 80s carbs. So long as there's no heat coming off the manifold, the electric choke will close. If it is hot, it won't allow it to close. Without that heat tube, if you ran the truck awhile and warmed it up, then shut it off for...
by American Thunder
Tue Feb 26, 2008 12:00 am
Forum: 240-300 "Big Block" Six Performance
Topic: Offenhauser manifold and carb adapter with Holley 500
Replies: 19
Views: 6170

Why not use a small holley 4v mech secondary carb on it?
by American Thunder
Mon Feb 25, 2008 11:51 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Big Six aluminum head update 9-14
Replies: 198
Views: 95074

Another major benefit to using an aluminum head is the ability to run pump gas with 1 full point higher compression ratio than you could with an iron head. And 1 point makes a big difference in terms of power and efficiency. I'd like to see this new 300 head use the FE style rocker shaft setup. That...
by American Thunder
Mon Feb 25, 2008 11:36 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Questions on SBC/F valves in 240/300 head
Replies: 27
Views: 4576

Is the 300 valve length the same as 302? From what I've read on this site, the 300 has the same valve diameter as a 302. (1.74/1.46) If they're the same lengths, then '69-'74 351W valves, which are 1.84 and 1.54, would be a nice upgrade in a 300? I think I have a set laying around that I could use.....
by American Thunder
Sun Feb 24, 2008 10:41 pm
Forum: Turbo, Supercharger, and Nitrous
Topic: Turbo 300
Replies: 51
Views: 5636

I was mulling over maybe running 3 or 4 psi on my 300, and with the torque increase, gear it higher in hopes of increasing my mileage. I've never messed with turbos before, I've always been all-motor. Interesting stuff, though.
by American Thunder
Sun Feb 24, 2008 12:28 am
Forum: Turbo, Supercharger, and Nitrous
Topic: Turbo 300
Replies: 51
Views: 5636

How does the "draw through" setup compare to a standard turbo setup in terms of power and efficiency?
It looks like draw through would work best with the carb, as I assume that it would atomize the fuel better.
by American Thunder
Sun Feb 24, 2008 12:17 am
Forum: Turbo, Supercharger, and Nitrous
Topic: 1163 HP Turbo I6
Replies: 2
Views: 706

Damn. :shock:
by American Thunder
Sat Feb 23, 2008 11:49 pm
Forum: Turbo, Supercharger, and Nitrous
Topic: Stroked, and turbo'd
Replies: 42
Views: 4633

Wow, I never knew you could get that kind of power from a little 250. That's awesome. Nice job.
by American Thunder
Sat Feb 23, 2008 11:33 pm
Forum: 240-300 "Big Block" Six Performance
Topic: MSD Ignition stuff..
Replies: 9
Views: 1069

The ignition is probably too far advanced if it's chugging when you try to start it. I am curious also, as to why you're using the OEM unit with the MSD unit??
by American Thunder
Sat Feb 23, 2008 2:48 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Choosing cam for more TORQUE at LOW rpm
Replies: 15
Views: 2650

Not only would it have more area under the curve with the wicked ramp angles, but way less friction too. I was sorta shocked to learn that Ford never put roller cams in the 300s in the late 80s, the way they did with the HO 5.0s. What a nice setup that would be. A factory efi roller 300 and 5 speed ...
by American Thunder
Sat Feb 23, 2008 11:10 am
Forum: 240-300 "Big Block" Six Performance
Topic: Even or Odd fire?
Replies: 10
Views: 1958

Odd firing V6 sounds like an engineering nightmare. Easier to just turn it back into a V8, or throw an inline in there.
by American Thunder
Fri Feb 22, 2008 5:43 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Choosing cam for more TORQUE at LOW rpm
Replies: 15
Views: 2650

Are there retro roller cam/lifter kits available for the 300? A roller would make more power and get better mileage.
by American Thunder
Fri Feb 22, 2008 1:59 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 300 book
Replies: 10
Views: 1823

I actually picked up a rebuilt 351M a few years back for $100, and with it, came a big box of stuff. In the box, I found a pile of mint condition Ford shop manuals for all of the 70s trucks. That was worth more to me than the motor! For general reference, I use a modern Ford parts catalog, which lis...
by American Thunder
Fri Feb 22, 2008 1:55 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Expected gas mileage for a '96 300?
Replies: 47
Views: 7559

My 4x4 Bronco with an old points ignition 300 and carb, 3.55 gears and C6 gets 19 mpg average. I use it to commute to work 60 miles a day.

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