Search found 590 matches

by F-250 Restorer
Thu Jun 07, 2018 3:51 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 300 torque build 85 Bronco
Replies: 31
Views: 1543

Re: 300 torque build 85 Bronco

I have the same intake. I was going to weld up a 90* hose bib for the coolant, but like the ones you have. Where did you find them? I assume those are Clifford headers. They are nice, however, they will seal in your starter. I switched to a much smaller efi starter to avoid that problem. Also, after...
by F-250 Restorer
Mon Apr 16, 2018 12:44 am
Forum: 240-300 "Big Block" Six Performance
Topic: Best sound. From exhaust
Replies: 11
Views: 738

Re: Best sound. From exhaust

On the other forum, FTE, down in the basement where they keep the inline 6 forum, do a search. There was a long-running thread about exhaust systems. It had a lot of vids with exhaust sounds of various systems, single, dual pipes, diff. mufflers, straight pipes, glass packs, etc. The thread starter ...
by F-250 Restorer
Fri Aug 25, 2017 1:44 am
Forum: 240-300 "Big Block" Six Performance
Topic: My Ford 300 High Performance Engine Build
Replies: 25
Views: 5017

Re: My Ford 300 High Performance Engine Build

My 3-2-1 headers merge into a single 2.5" megaphone. About the same cross sectional area as two 1.75" outlets. Making about 550 hp na. Frenchtown Fly: I wonder how much it would make if it wasn't restricted like that. If you posted the above to respond to my note about the two 1.75" ...
by F-250 Restorer
Wed Aug 16, 2017 12:12 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Recommended carburetors for mild upgrade
Replies: 38
Views: 3538

Re: Recommended carburetors for mild upgrade

I don't know why Offy began writing that on their intakes. I suspect it is because the newer ones may be made in China, and so there are some quality concerns regarding the porosity of the casting.
by F-250 Restorer
Sun Aug 13, 2017 2:22 am
Forum: 240-300 "Big Block" Six Performance
Topic: Recommended carburetors for mild upgrade
Replies: 38
Views: 3538

Re: Recommended carburetors for mild upgrade

Kevin, are you still making or are you willing to make, those heat plates? Just wondering. I may make it myself as I've got some good steel plate stock and the necessary tools, but I'm just fairly certain yours look better than mine will. Cutting the thick plate stock is really a pain for my setup ...
by F-250 Restorer
Sat Aug 12, 2017 3:46 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Big Block Chevy Roller Rockers
Replies: 7
Views: 1000

Big Block Chevy Roller Rockers

I am hoping this thread will be used for the benefit of others. I am concerned with fitment and exact measurements with the 1.6 big block Chevy roller rockers. I would like to hear from someone knowledgeable, who has used, or is using, the bbc r.rockers, and who can explain the differences between t...
by F-250 Restorer
Thu Aug 10, 2017 9:09 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Recommended carburetors for mild upgrade
Replies: 38
Views: 3538

Re: Recommended carburetors for mild upgrade

The Edelbrock 500 cfm, 1403, with electric choke will work fine, as will the Holley the other member mentioned. The Holley 1848, 465 cfm, works well too. Summit Racing also makes, or, I should say that Holley makes it and sells it through Summit, a 500 cfm carburetor that is a copy of the legendary ...
by F-250 Restorer
Tue Aug 01, 2017 12:43 am
Forum: 240-300 "Big Block" Six Performance
Topic: EFI Head Combustion Chamber Size
Replies: 2
Views: 504

Re: EFI Head Combustion Chamber Size

I have an interesting tidbit that may help someone looking for a solution about how to lower compression on a build gone wrong with too compression. A forum member somewhere had a efi head. I believe he relied on info from Clifford, rather than measuring and running the numbers himself to calculate ...
by F-250 Restorer
Sun Jul 30, 2017 2:01 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Cam bearing size differences!!!
Replies: 11
Views: 1410

Re: Cam bearing size differences!!!

THE FRENCHTOWN FLYER wrote:All cam journals for all model years are the same. Its the block bearing shell bores that changed.


Then it must be possible to purchase cam bearings with various OD's?
by F-250 Restorer
Wed Jul 26, 2017 1:13 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Cam bearing size differences!!!
Replies: 11
Views: 1410

Re: Cam bearing size differences!!!

Currently I'm working on a book about e-fans. When that is published I'd like to begin a book about the 300, the tractor engine that went mainstream, then fizzled out. I have all this info in files. I simply need to organize it and fill in a bit here and there. The problem with that is the problem w...
by F-250 Restorer
Tue Jul 25, 2017 9:16 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Cam bearing size differences!!!
Replies: 11
Views: 1410

Cam bearing size differences!!!

I found this info long ago. I thought it may help those doing a rebuild. If I remember correctly, it was about 1985 that Ford changed the length of their valves too. I'm sure someone will chime in here with the exact year. 1985-87 Ford 300 CID (4.9L) Engines The Form Motor Company has revised the ca...
by F-250 Restorer
Wed Jul 19, 2017 2:29 pm
Forum: 240-300 "Big Block" Six Performance
Topic: My Ford 300 High Performance Engine Build
Replies: 25
Views: 5017

Re: My Ford 300 High Performance Engine Build

A very nice engine. The EFI manifolds exit at 1.75". Several sites I've checked show that max HP for dual 1.75" is 220 hp. I found that running a 3g alternator required a double v belt to to prevent belt slippage/squeal. You may find otherwise. Here is a photo of a friend's hotrod with a h...
by F-250 Restorer
Wed Jul 05, 2017 9:18 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Street 300 L6 Motor
Replies: 190
Views: 16241

Re: Street 300 L6 Motor

[/quote] I have built a few motors nearly identical to your concept. I used the dual EFI exhausts and I think they will RPM better than the HD single. With good head work it will meet or exceed your 200 hp objective and pull strong to 5000 rpm. ...[/quote] What would be interesting is whether those ...
by F-250 Restorer
Mon Jul 03, 2017 8:53 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Street 300 L6 Motor
Replies: 190
Views: 16241

Re: Street 300 L6 Motor

Your build sounds interesting. But with a flat top piston won't it be difficult to keep the c.r. to 9.0:1? You should also consider the dynamic c.r. I believe you need to be under 7.5 to avoid pinging. You might want to consider using the early 300 rod. That will allow you to use a 351 W piston, whi...
by F-250 Restorer
Mon Jul 03, 2017 6:01 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Spark Plug Tech
Replies: 8
Views: 1234

Re: Spark Plug Tech

I thought someone might actually have a chart or graph showing the various plugs available for the 300, and the different heat ranges for each, and when to use which, according to the mods you have.

But that was wishful thinking. This engine has been out of production for 20+ years.
by F-250 Restorer
Sat Jul 01, 2017 2:37 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Spark Plug Tech
Replies: 8
Views: 1234

Re: Spark Plug Tech

Here is a photo link. https://goo.gl/photos/d5MgFSYJXY1iAsn26 These are stock autolite plugs for a 78 300. The center electrode is now pointed. I wonder what causes that. Edit: I think I found the answer: Appearance & Symptoms: The insulator will have a glazed white appearance and may have small...
by F-250 Restorer
Fri Jun 30, 2017 8:58 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Spark Plug Tech
Replies: 8
Views: 1234

Spark Plug Tech

I am installing a new MSD 6A (digital), and have going through the ignition system so all the components are good--wires, cap and rotor, coil, and last I changed the plugs. I was a bit perplexed by the plugs. The center electrode was worn and had become pointed. They had between 40-50k miles on them...
by F-250 Restorer
Mon Jun 26, 2017 9:21 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Clifford shorty Headers on a stock 240 L6 in a Econoline van
Replies: 12
Views: 1637

Re: Clifford shorty Headers on a stock 240 L6 in a Econoline van

Regarding the Clifford header flange being thinner than Clifford intake flange: I found the same issue using an Offy intake with the Hedman header. To deal with it I took the oem thick washers, clamped them in vise grips, and ground down one side until they sat flat. After 8 years and never a leak. ...
by F-250 Restorer
Sat Jun 24, 2017 9:44 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Eugene's 6 into 1 header
Replies: 16
Views: 2830

Re: Eugene's 6 into 1 header

What is the diameter of the collector?
by F-250 Restorer
Tue May 09, 2017 11:11 am
Forum: 240-300 "Big Block" Six Performance
Topic: Low performance offenhausen duel plane
Replies: 16
Views: 4431

Re: Low performance offenhausen duel plane

Hello. Generally, if you want a response from readers, it is best to ask a question.
by F-250 Restorer
Mon May 08, 2017 2:00 am
Forum: 240-300 "Big Block" Six Performance
Topic: 300" L6 Piston & Head Information
Replies: 57
Views: 6005

Re: 300" L6 Piston & Head Information

I skimmed much of the posts, so if this has been covered I'm sorry.

To the list of heads, the 240, 300 carb, and the 4.9 efi, I think you need to add one. In 82 Ford made a 300 carbed head with odd ridges in the c.chambers that cut down the cc volume to about 72cc. I have one.
by F-250 Restorer
Sat Apr 29, 2017 1:25 am
Forum: 240-300 "Big Block" Six Performance
Topic: Ignition Selection Help
Replies: 16
Views: 1914

Re: Ignition Selection Help

Pmuller9: Check out the Crane ignition boxes. I've read some good reports about them online. I called MSD today to arrange sending in my unit to have it repaired. I was on hold for 33 minutes. Called another person (had to call accounting to speak to a living person, since there is NO CUSTOMER SERVI...
by F-250 Restorer
Thu Apr 27, 2017 4:24 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Ignition Selection Help
Replies: 16
Views: 1914

Re: Ignition Selection Help

From what I just saw with a quick Google search is that the Summit box is made by MSD/MALLORY/HOLLEY in the same facility and identical to a comparable unit... Food for thought. Thanks. But I only read one guy (on the HAMB) who mentioned that he toured MSD and they were constructing the Summit boxe...
by F-250 Restorer
Thu Apr 27, 2017 1:24 am
Forum: 240-300 "Big Block" Six Performance
Topic: Ignition Selection Help
Replies: 16
Views: 1914

Re: Ignition Selection Help

Pmuller9, I will ck the advance as you mentioned. I'm removing the Summit box, after I check the advance. I'll send the msd in and have it refurbished by msd. I rather surprised by the lack of performance with the summit box. All the specs show it as putting out greater energy than the msd, yet the ...
by F-250 Restorer
Sat Apr 22, 2017 3:35 am
Forum: 240-300 "Big Block" Six Performance
Topic: Ignition Selection Help
Replies: 16
Views: 1914

Re: Ignition Selection Help

Yes, I tried that. It wouldn't start.

I'm wondering if Summit got the instructions wrong about which wire to cut for a 6 cyl engine. I guess I could run with 24* advance, which is where it wants to run, but that can't be right.
by F-250 Restorer
Fri Apr 21, 2017 9:34 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Ignition Selection Help
Replies: 16
Views: 1914

Re: Ignition Selection Help

Exactly. Without touching the dizzy. MSD was at 8btdc. With the Summit box it is at the advanced edge--off the edge-- of the timing index mounted above the harmonic balancer. I can't be sure since it is off the chart, but I'm guessing 16-18 btdc. And, it seems slugish, lacks pep, as though it needs ...
by F-250 Restorer
Fri Apr 21, 2017 3:39 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Ignition Selection Help
Replies: 16
Views: 1914

Ignition Selection Help

For years I ran an MSD 6a analog box with an MSD street blaster TFI coil: https://www.summitracing.com/parts/msd-8227/overview/ I should mention that I use a DuraSpark2 distributor. But the MSD died and I thought I'd try the Summit box. They had two choices. One was a bit less power, the other a bit...
by F-250 Restorer
Mon Apr 17, 2017 12:13 am
Forum: 240-300 "Big Block" Six Performance
Topic: Intake/Exhaust Manifold studs
Replies: 5
Views: 933

Re: Intake/Exhaust Manifold studs

Or ... check Hillco dot com. I used to sell the stud kits, and got all my fasteners from them.
by F-250 Restorer
Thu Apr 13, 2017 3:18 pm
Forum: 240-300 "Big Block" Six Performance
Topic: DUI Distributor Data?
Replies: 2
Views: 663

DUI Distributor Data?

After smoking my MSD, I've been researching various ignition systems. I'm quite surprised to find zero data regarding the Performance Distributors' DUI. Getting the millijoules of spark, or volts to coil from them is as difficult as getting a straight answer about whether their stuff is made in Chin...
by F-250 Restorer
Sat Apr 08, 2017 11:33 am
Forum: 240-300 "Big Block" Six Performance
Topic: Classic Inlines Cheap Performance Ignition
Replies: 2
Views: 875

Classic Inlines Cheap Performance Ignition

I was reading about ignition systems at gofastforless dot com, and came across a great, inexpensive ignition system ... for $25! Then I found that Performance Distributors, the co. that makes/sells DUI distributors, sells the same module, painted, with a nice sticker on it, for $139! This is the sys...
by F-250 Restorer
Fri Mar 31, 2017 8:52 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Tall valve cover
Replies: 10
Views: 1784

Re: Tall valve cover

Contact CNC dude here on the forum. He makes a spacer that sits under the v.cover.
by F-250 Restorer
Sun Mar 19, 2017 1:20 am
Forum: 240-300 "Big Block" Six Performance
Topic: Power by Ford Studebaker truck
Replies: 62
Views: 6639

Re: Power by Ford Studebaker truck

Thanks for the link, J.R. Yes, I checked that site when I had the R11. I seem to remember them coming on Ford trucks up until 67-68ish. I've often wondered if I could have used it (the OD tail piece) like this (http://classicbroncos.com/ebbarn/overdrive.html) behind a C6, as you see they have done b...
by F-250 Restorer
Thu Mar 16, 2017 1:43 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Power by Ford Studebaker truck
Replies: 62
Views: 6639

Re: Power by Ford Studebaker truck

What a good looking truck. I like it. Many of the old Studebakers (not sure about the trucks) had the Borg Warner three speed overdrive transmissions. It was quite an interesting trans-- gave the driver a high and a low to each gear. I had one, and wanted to use it behind my 300, but parts were like...
by F-250 Restorer
Thu Mar 09, 2017 3:13 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Screw In Rocker Studs
Replies: 18
Views: 2360

Re: Screw In Rocker Studs

I would add, that if a shop is installing the studs, make sure they are ARP. I had my shop buy them and install them, and the tops of three of the studs sheared off. I consider it a miracle, on par with the parting of the Red Sea, that my engine didn't suck a valve. Since changing to ARP studs I've ...
by F-250 Restorer
Sun Mar 05, 2017 7:57 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Screw In Rocker Studs
Replies: 18
Views: 2360

Re: Screw In Rocker Studs

Now, what if someone were to keep using stock style rockers and locknuts, but install screw in studs, would machining down the pedestals still have to be done? It looks to me that there's plenty of room with how far the stock rockers sit up on the press in studs. The bosses still need to be machine...
by F-250 Restorer
Mon Feb 27, 2017 3:36 pm
Forum: 240-300 "Big Block" Six Performance
Topic: I accidentally bought the old style offenhauser 360 intake
Replies: 20
Views: 2382

Re: I accidentally bought the old style offenhauser 360 intake

I believe what the op is trying to say is that the plenum has a divider that rises all the way from bottom of the intake to carb mounting surface. The mounting surface is divided into four holes, as is all the new DP intakes.
by F-250 Restorer
Sun Feb 26, 2017 10:01 pm
Forum: 240-300 "Big Block" Six Performance
Topic: I accidentally bought the old style offenhauser 360 intake
Replies: 20
Views: 2382

Re: I accidentally bought the old style offenhauser 360 intake

Well, I question that reasoning. The C type Offy is used with the carb oriented with the primaries toward the grill, and it works fine. Perhaps the rear three cylinders run slightly leaner than the front, but certainly nothing to be concerned about, or there would have been an uproar all over the fo...
by F-250 Restorer
Thu Feb 23, 2017 11:42 am
Forum: 240-300 "Big Block" Six Performance
Topic: Screw In Rocker Studs
Replies: 18
Views: 2360

Re: Screw In Rocker Studs

I wanted to add: Apply some sort of sealant to the stud threads that screw into the head. They screw into a coolant passage and you don't want water/coolant escaping.
by F-250 Restorer
Wed Feb 22, 2017 12:21 pm
Forum: 240-300 "Big Block" Six Performance
Topic: New vs Used EFI exhaust?
Replies: 4
Views: 828

Re: New vs Used EFI exhaust?

If I were you I would go with the Ford used ones and eliminate the uncertainty (cracking, warping, fitment) of using an aftermarket part. I would also send ebay a note informing them that this part is made in China. No efi manifolds factory installed on Ford came with 'made in China' on it. They nee...
by F-250 Restorer
Sun Feb 19, 2017 7:14 pm
Forum: 240-300 "Big Block" Six Performance
Topic: REBUILD KIT FOR A 300 (THE PHENOLIC TIMING GEAR STRIKES AGAIN! I THINK...)
Replies: 2
Views: 626

Re: REBUILD KIT FOR A 300 (THE PHENOLIC TIMING GEAR STRIKES AGAIN! I THINK...)

A member on this and another forum mentioned that Mr.Gasket was belly up--out of business. The one ordered from summit was mislabeled and he ended up getting a gasket for a Chevy I6, when he ordered the Mr.G 260. I think that if you order that gasket from Summit, you might want to ask them to do an ...
by F-250 Restorer
Sun Feb 19, 2017 12:09 pm
Forum: 240-300 "Big Block" Six Performance
Topic: $10K in a 300!
Replies: 2
Views: 793

$10K in a 300!

I don't think I've seen a build like this. https://www.youtube.com/watch?v=2l3hL1W3lMs
by F-250 Restorer
Fri Feb 17, 2017 11:36 am
Forum: 240-300 "Big Block" Six Performance
Topic: 351 Pistons
Replies: 137
Views: 9937

Carburetor: I was planning on using the Holley 1848, 465 cfm, I have. I may try a custom qjet I set up for it. Since I'm changing from a DP intake to a C, and wrapping the header, I don't expect to have the heat issues that forced me to remove the qjet initially.
by F-250 Restorer
Fri Feb 17, 2017 1:27 am
Forum: 240-300 "Big Block" Six Performance
Topic: 351 Pistons
Replies: 137
Views: 9937

Re: 351 Pistons

Thanks, P: I'm happy to know that when the arrow is pointed to the front of engine, all is as it should be. kevin
by F-250 Restorer
Wed Feb 15, 2017 9:19 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 351 Pistons
Replies: 137
Views: 9937

Re: 351 Pistons

I should soon be assembling the engine. With this piston there is a .060 offset of the pin. All the pistons are offset the same direction. With the arrow forward, all pistons will have the offset toward the passenger side of engine. I was reading about bias/preload in v8 as opposed to an inline 6, a...
by F-250 Restorer
Thu Feb 09, 2017 10:37 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 92 Efi build
Replies: 17
Views: 1650

Re: 92 Efi build

It would be very interesting if the originators of certain threads would post with their desired hp, the dollar amount they are willing to spend to get there. If that were the case, I think said threads might get more replies.

Oh, now there I go again, not playing nice.
by F-250 Restorer
Sat Feb 04, 2017 7:54 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 351 Pistons
Replies: 137
Views: 9937

Re: 351 Pistons

Thanks for checking. I got injured, got behind on completing 3 books, and the engine is sitting in the garage while I try to catch up with the writing.
by F-250 Restorer
Sun Jan 15, 2017 5:56 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Dropped valve in 4.9l
Replies: 3
Views: 653

Re: Dropped valve in 4.9l

I'm sorry to hear that. I know the feeling. I had an engine fail after 1000 miles. It is the worst feeling. I would tear it down and try to determine the cause of the failure before I proceeded. Questions that come to mind are: Were the valve springs all installed correctly, to the proper height, co...
by F-250 Restorer
Thu Jan 12, 2017 10:58 am
Forum: 240-300 "Big Block" Six Performance
Topic: Anyone run Clifford performance shorty headers?
Replies: 14
Views: 2041

Re: Anyone run Clifford performance shorty headers?

According to this site, http://www.exhaustvideos.com/faq/how-to-calculate-muffler-size-pipe-diameter/?doing_wp_cron=1484235945.0622301101684570312500 the max hp for a dual 1.75" system is 217 hp. The diameter of the efi manifolds exit or collector, to use header terminology, is 1.75". If y...
by F-250 Restorer
Sat Jan 07, 2017 1:09 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Anyone run Clifford performance shorty headers?
Replies: 14
Views: 2041

Re: Anyone run Clifford performance shorty headers?

It looks like the Cliff headers will fit 80--87. In 88, as you mentioned, Ford went to efi and the split exh manifolds. I don't know if Cliff means they fit thru the efi years to the last 300 year in 96. It is best to call and ask. You might consider keeping/using the EFI manifolds. According to the...
by F-250 Restorer
Wed Jan 04, 2017 5:19 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Summit Performance Kit for the 300
Replies: 2
Views: 906

Summit Performance Kit for the 300

I thought I'd throw this out in case any member was interested. I hadn't seen it before. It is a compilation of some of the parts used in the powernation (did I get that right?) video. It is ARP head studs, main studs, rods bolts, Felpro head gasket 1024, and int/exhaust gasket, with lube and oil. h...

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