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2018 Contributors:
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2019 Contributors:
NJwpod, 1strodeo, mightynorseman, maxtrux, 6d7coupe, broncr, Phase3, 68Flareside240, bmbm40,
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Unknown->> M.Ketterer, T.Smith, J.Myers, P.McIntire - Please PM me (1966Mustang) and lemme know who you are!

Search found 299 matches

by BigBlue94
Mon Jun 10, 2019 10:07 am
Forum: 240-300 "Big Block" Six Performance
Topic: Correct Timing Marks 240 & 300
Replies: 9
Views: 224

Re: Correct Timing Marks 240 & 300

My balancer (the dorman one that fell apart) only had a thick notch on it that was supposed to be the timing mark. Well I dont have the passenger side pointer on my 300 and that's where it was lining up at, at TDC. So i just brought #1 to TDC and made my own mark at the 0° mark on my timing cover. T...
by BigBlue94
Mon Jun 10, 2019 9:27 am
Forum: 240-300 "Big Block" Six Performance
Topic: Another piston question
Replies: 17
Views: 479

Re: Another piston question

Can you get a pin centerline to bottom of skirt measurement? I can compare to my 4.060" 351w pistons at home and give you an idea. Though I'm sure someone here has the specs
by BigBlue94
Sat Jun 08, 2019 1:10 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Vacuum Secondaries
Replies: 23
Views: 583

Re: Vacuum Secondaries

I'm pretty well a carb newbie. I have a small amount of tuning experience on a quickfuel 450 vacuum secondary carb. Engine is 309ci with a 9.75:1 SCR. Dynamic at 7.47:1. Large SI valves in head with bowl work. Clifford intake and long tube headers 351w 'sportsman N' step dish pistons Schneider 140H ...
by BigBlue94
Sat Jun 01, 2019 1:45 pm
Forum: Buy, Sell, or Trade - Big Six
Topic: Wanted: 4.9 EFI Lower Intake Manifold
Replies: 3
Views: 211

Re: Wanted: 4.9 EFI Lower Intake Manifold

Those are plentiful in the local KC yards. Saw probably 10 of them last time. PM me if you want me to scoop one up next time
by BigBlue94
Fri May 31, 2019 1:22 pm
Forum: 240-300 "Big Block" Six Performance
Topic: So I have a plan but now im Second guessing myself.
Replies: 42
Views: 795

Re: So I have a plan but now im Second guessing myself.

1986F150six wrote:AbandonedBronco's ride! :thumbup:


Yep, I got to ride in it when we were both in Moab for the Bronco Safari a few weeks ago. It's got great power and smooth performance. Definitely a good build.
by BigBlue94
Fri May 31, 2019 12:41 pm
Forum: 240-300 "Big Block" Six Performance
Topic: CNG MAF 300
Replies: 2
Views: 255

Re: CNG MAF 300

I am very familiar with impco in propane. CNG LESS so. we had a couple of rigs were cng when I was mechanic on a tunnel job . I cannot for the life of me understand the purpose of that monster u have there. however, if the CNG unit and especially the tanks are still on that rig, you have, in this c...
by BigBlue94
Thu May 30, 2019 7:39 pm
Forum: 240-300 "Big Block" Six Performance
Topic: So I have a plan but now im Second guessing myself.
Replies: 42
Views: 795

Re: So I have a plan but now im Second guessing myself.

Sorry for the lifter tick, didnt have em adjusted quite right. Breakin and first drive. Exhaust is 3" through a borla xr1 muffler.

https://youtu.be/IjIARlqU91w

https://youtu.be/_-cn1HqEKmA

https://youtu.be/zobA_DZ5Zzs
by BigBlue94
Thu May 30, 2019 7:34 pm
Forum: 240-300 "Big Block" Six Performance
Topic: So I have a plan but now im Second guessing myself.
Replies: 42
Views: 795

Re: So I have a plan but now im Second guessing myself.

I too used their lifters, since they wont warranty the stick if you dont. Jerry originally recommended the 131H for me, but I wanted a bit bigger. PMuller helped me choose the 140H. I also used their breakin additive and the ZDDP additive once the rings seated. When I 'found' Schneider, I was amazed...
by BigBlue94
Wed May 29, 2019 7:22 pm
Forum: 240-300 "Big Block" Six Performance
Topic: So I have a plan but now im Second guessing myself.
Replies: 42
Views: 795

Re: So I have a plan but now im Second guessing myself.

I can actually add to a thread haha! I'm running 9.75 static CR with a dynamic CR of 7.47. It runs great on 91 octane. It ran okay on a 50/50 mix of 91 and 85 octane (at a much higher altitude than I live). I am running the Schneider 140H cam and I can tell you it is NOT a gutless wonder off idle. I...
by BigBlue94
Mon May 27, 2019 9:43 am
Forum: 240-300 "Big Block" Six Performance
Topic: 302 to 300 engine swap questions
Replies: 8
Views: 423

Re: 302 to 300 engine swap questions

I read somewhere that the 302 towers could be swapped and they would work the engine would just sit an inch or so lower unfortunately I can't remember where I read it but BigBlue94 your saying that isn't true correct? Well, I cant say it wouldn't work, but isn't proper at least. User AbandonedBronc...
by BigBlue94
Sun May 26, 2019 10:03 am
Forum: 240-300 "Big Block" Six Performance
Topic: 302 to 300 engine swap questions
Replies: 8
Views: 423

Re: 302 to 300 engine swap questions

No, the engine perches are i6 or v8 specific. You'll have to swap them out.

Wires for an engine to run depends on ignition. Basic needs are coil and distributor.

Use a starter and flex plate for a 300, but the 302 trans and converter will bolt up.
by BigBlue94
Fri May 24, 2019 12:47 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Required reading before building a 300.
Replies: 9
Views: 551

Re: Required reading before building a 300.

Anything by David Vizard is a good read. I have his book on Holley carbs and it's very very helpful. Has the basics, the advanced stuff, and tips and tricks from racers and engine professionals.
by BigBlue94
Fri May 24, 2019 12:42 pm
Forum: 240-300 "Big Block" Six Performance
Topic: TECH TIPS #39, #40 & #41
Replies: 8
Views: 412

Re: TECH TIPS #39, #40 & #41

Nice tips!

I have one of those hanging motor die grinders. The motor hands on a peg hook and the actual die grinder is attached to it with a 3 foot cord. Speed is controlled with a foot pedal, like a sewing machine. I really like it, and it's easy to control.
by BigBlue94
Fri May 24, 2019 12:39 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Offenhauser VS Clifford
Replies: 15
Views: 729

Re: Offenhauser VS Clifford

Headers suck unless you are only street driving. They heated my 300 up to 240° out in moab, causing fuel to boil in the carb. The Clifford has a simple square flange that requires an adapter plate for whatever fuel metering device you choose. Aside from the integral waterjacket, the Clifford has cas...
by BigBlue94
Sat May 18, 2019 7:16 pm
Forum: 240-300 "Big Block" Six Performance
Topic: catalog of conceptual build plans for the b.b.ford sticky
Replies: 39
Views: 3644

Re: catalog of conceptual build plans for the b.b.ford sticky

KB379 pistons for a pre-'71 351w fit stock 300 rods with a bushing in the pin end. My block only needed a few thousandths to get to zero deck. https://uempistons.com/i-29938-kb-hyper-piston-ford-351w-rod-5-956-step-dish-15cc.html The piston is a step dish of 15cc. It was designed for the sportsman ...
by BigBlue94
Sat May 18, 2019 6:21 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Coil Mounting Bracket Change
Replies: 15
Views: 458

Re: Coil Mounting Bracket Change

old28racer wrote:It's going on an old truck, no show truck, just my get around town ride. If it holds the coil vertical I will be happy. Thanks again.


You're more than welcome!

I didnt even notice its 'true nature' until I really looked at it, so it's not super janky looking or anything.
by BigBlue94
Sat May 18, 2019 6:18 pm
Forum: 240-300 "Big Block" Six Performance
Topic: CNG MAF 300
Replies: 2
Views: 255

CNG MAF 300

I was at the junkyards today and saw two MAF 300s. Both in 96 F150s. The second one was in an "altered vehicle" with tags from Impco and T.D.World. Upon research, Impco is a major converter of trucks to CNG. T.D World does essentially assembly R&D, installing stuff in real vehicles for...
by BigBlue94
Sat May 18, 2019 6:07 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Coil Mounting Bracket Change
Replies: 15
Views: 458

Re: Coil Mounting Bracket Change

Was at the JY today, and noticed quite a few upright brackets like the one I have. And confirmed my suspicion, that it's an efi square coil bracket with a round clamp added. I think the added round clamp is used for attaching the end pole of a chain link fence to a structure. It works though, and wi...
by BigBlue94
Fri May 17, 2019 10:38 am
Forum: 240-300 "Big Block" Six Performance
Topic: Coil Mounting Bracket Change
Replies: 15
Views: 458

Re: Coil Mounting Bracket Change

Like this? 1985 bronco, 300 https://www.supermotors.net/getfile/1128782/fullsize/20180217_132027.jpg https://www.supermotors.net/getfile/1129054/fullsize/20180224_163846.jpg I no longer need it, as I went HEI. OP, PM me if you want it. Then whoever else, if he passes
by BigBlue94
Fri May 10, 2019 4:54 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 300 torque build 85 Bronco
Replies: 313
Views: 15888

Re: 300 torque build 85 Bronco

Great feedback. Thanks. There should be better low rpm response and gas mileage. What is the initial timing and total timing? Are you running vacuum advance? Milage coming back was better, a bit over 12mpg. Coming down the mountains, and in eastern CO, I was cruising at 16 to 17 on the wideband and...
by BigBlue94
Fri May 10, 2019 11:05 am
Forum: 240-300 "Big Block" Six Performance
Topic: 300 torque build 85 Bronco
Replies: 313
Views: 15888

Re: 300 torque build 85 Bronco

Now that your carb is tuned. Do you like the 220 duration cam for your set up? Carb is far from perfect, but drivable for sure. Still a bit lacking out of the hole. The 280 cam I'm running seems to be great. It feels way more peppy than any SBF I've driven. It seems to have great power all the way ...
by BigBlue94
Thu May 09, 2019 12:57 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 300 torque build 85 Bronco
Replies: 313
Views: 15888

Re: 300 torque build 85 Bronco

There were like 150 Broncos our there playing around. While official tech support is sparse, theres plenty of good ol Ford guys and gals out there that brought the right part or tool. The one shot is showing a trail welder being used to repair a trackbar. It just hooks to the battery and goes. There...
by BigBlue94
Thu May 09, 2019 12:04 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 300 torque build 85 Bronco
Replies: 313
Views: 15888

Re: 300 torque build 85 Bronco

I had taken that side apart right before I left to fix the lockout cap screws. I packed that sucker with Ford Moly Grease out of a blue can. I'm pretty sure I gave the bearings too much preload. I love the Iroks. Mine are the non-directional version, in ten ply. I drive a lot of highway, hence the t...
by BigBlue94
Tue May 07, 2019 4:52 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Top things to freshen up an old engine.
Replies: 16
Views: 701

Re: Top things to freshen up an old engine.

I'd do motor mounts while you're in there. And replace all vacuum lines and coolant hoses.

Not a bad time for a new fan and possibly a new radiator.
by BigBlue94
Tue May 07, 2019 4:17 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 300 torque build 85 Bronco
Replies: 313
Views: 15888

Re: 300 torque build 85 Bronco

Wow! When you decide to do a shaken down run you get serious. Hope the rest of the way home is smooth sailing. Hah you arent the first to say that! Broke a rear driveshaft out there and my spare tire carrier too. But man it was a good time! AbandonedBronco and I were the only big sixes out there of...
by BigBlue94
Tue May 07, 2019 12:30 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 300 torque build 85 Bronco
Replies: 313
Views: 15888

Re: 300 torque build 85 Bronco

Well, Sunday I made it 700 miles. I made it up over 10.5k and 11k passes, only dropping down to 40mph at the top. Shift er back into 3rd and up we went. Got down to 3100 ft before the jets were just too lean and I couldn't maintain speed without opening g the secondaries. The next day I made it abou...
by BigBlue94
Sat May 04, 2019 2:27 am
Forum: 240-300 "Big Block" Six Performance
Topic: 300 torque build 85 Bronco
Replies: 313
Views: 15888

Re: 300 torque build 85 Bronco

Update: these headers are seriously terrible for offroad use! The trails out at moab sure punished the ol 300. Got so hot it was boiling the fuel in the carb and nearly killed my secondary ignition solenoid. Had to wire distributor direct to the battery and crank the idle up to get it to run. And th...
by BigBlue94
Tue Apr 30, 2019 3:42 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 300 torque build 85 Bronco
Replies: 313
Views: 15888

Re: 300 torque build 85 Bronco

Well it worked for a while. The thin ears bent out and one broke, after 2hrs of trail driving. I got it fixed enough to be able to drive to camp and back in tomorrow to get the new one.

Easiest way to swap one out?
by BigBlue94
Mon Apr 29, 2019 9:40 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 300 torque build 85 Bronco
Replies: 313
Views: 15888

Re: 300 torque build 85 Bronco

Fordman75 wrote:The downside to the wrench is you might get some vibrations with that.


I was just talking to my dad about that. I tried to center it as best possible. That's all I had on hand. At worst, it should get me to town so I dont have to rely on finding a ride.
by BigBlue94
Mon Apr 29, 2019 9:00 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 300 torque build 85 Bronco
Replies: 313
Views: 15888

Re: 300 torque build 85 Bronco

Just an idea,maybe to get you by you could use a few sheet metal screws and a large washer on the screws and force the screws into the rubber piece in the middle of the harmonic balancer to keep the outer ring from damaging something. I had that thought too, but didn't have any that arent holding s...
by BigBlue94
Mon Apr 29, 2019 8:34 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 300 torque build 85 Bronco
Replies: 313
Views: 15888

Re: 300 torque build 85 Bronco

Do you have room to make a plywood or metal disc that will bolt on using the three puller holes and hold it in place? I was going to just suggest you knock the outer ring off until I remembered it has all the FEAD pulleys on it. I was contemplating something like that. It is still somewhat tight on...
by BigBlue94
Mon Apr 29, 2019 8:11 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 300 torque build 85 Bronco
Replies: 313
Views: 15888

Re: 300 torque build 85 Bronco

As I'm making a tight turn back into my camp spot, I hear my fan blade hit something. My brand new harmonic balancer delaminated. I'm guessing that was the odd vibration I had on the last 30 miles. The pulley section had slid forward about 3/4". Napa in moab will have one Wednesday. What a bumm...
by BigBlue94
Mon Apr 29, 2019 10:58 am
Forum: 240-300 "Big Block" Six Performance
Topic: 300 torque build 85 Bronco
Replies: 313
Views: 15888

Re: 300 torque build 85 Bronco

Ratios are good, just a touch rich occasionally.

Mpg is about 10

Stayed in the back of the bronco last night in Cenral City CO. This morning the bronco is covered in ice. Fun times rejetting the carb await Haha.
by BigBlue94
Sun Apr 28, 2019 11:22 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 300 torque build 85 Bronco
Replies: 313
Views: 15888

Re: 300 torque build 85 Bronco

Been a busy few days getting ready for the trip. I tightened two rockers that were loose, and that completely stopped the ticking. Changed the oil, and the fluid in the np435 and np208. Today I put 600 miles on it, bringing the total to about 800. Had a oil leak about 3 hours in from my oil pressure...
by BigBlue94
Thu Apr 25, 2019 10:37 am
Forum: 240-300 "Big Block" Six Performance
Topic: Cummins
Replies: 6
Views: 322

Re: Cummins

The valves are in fact similar in size already
by BigBlue94
Thu Apr 25, 2019 8:51 am
Forum: 240-300 "Big Block" Six Performance
Topic: 300 torque build 85 Bronco
Replies: 313
Views: 15888

Re: 300 torque build 85 Bronco

Dino oil that has high zinc content to protect the cam and lifters. I run Driven (Joe Gibbs) BR-30 oil for break-in. https://www.drivenracingoil.com/br-30-5w-30-conventional-break-in-oil.html Then I switch to one of their Hot Rod oils made for flat tappet cams. https://www.drivenracingoil.com/hot-r...
by BigBlue94
Wed Apr 24, 2019 10:34 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 300 torque build 85 Bronco
Replies: 313
Views: 15888

Re: 300 torque build 85 Bronco

Nice job fixing the header leak. I'll be interested in the air/fuel ratios now that the exhaust leak is fixed and the smaller PV restrictors are in. I would say that you are no longer a carb noob. The engine should feel more responsive as you lean out the WOT jetting. Lol no longer a noob, but bare...
by BigBlue94
Wed Apr 24, 2019 9:27 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 300 torque build 85 Bronco
Replies: 313
Views: 15888

Re: 300 torque build 85 Bronco

Gasket is on, and it's all buttoned back up. I ended up welding a bead around the three thin or no gasket coverage areas on the header flange and then ground/sanded them smooth. This effectively widened the sealing area. I still have a small leak or a rocker arm that isn't quite tight enough. But it...
by BigBlue94
Wed Apr 24, 2019 9:53 am
Forum: 240-300 "Big Block" Six Performance
Topic: 300 torque build 85 Bronco
Replies: 313
Views: 15888

Re: 300 torque build 85 Bronco

Yeah, its stressful!

Hope the new gasket fits better... notice the seal pattern on the one that burned out.

Image
by BigBlue94
Tue Apr 23, 2019 6:00 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 300 torque build 85 Bronco
Replies: 313
Views: 15888

Re: 300 torque build 85 Bronco

Just ordered .028, .030, and .032 screw in restrictors and some new fuel bowl and baseplate gaskets. The ones I got today are indeed .035" and .040" They should be here tomorrow, along with my header gasket. Tonight I'll get the carb and intake pulled off and slide the headers over in prep...
by BigBlue94
Tue Apr 23, 2019 12:17 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 300 torque build 85 Bronco
Replies: 313
Views: 15888

Re: 300 torque build 85 Bronco

Just start your QF carburetor jets, restrictors and bleed collection for future tuning. Do the new ones measure .035" and .040"? If so here is the .030" https://www.holley.com/products/fuel_systems/carburetor_components/jets_metering_rods_bleeds/bleeds_and_emulsion_jets/parts/7-30QFT...
by BigBlue94
Tue Apr 23, 2019 10:39 am
Forum: 240-300 "Big Block" Six Performance
Topic: 300 torque build 85 Bronco
Replies: 313
Views: 15888

Re: 300 torque build 85 Bronco

Lol yeah, that's 40 bucks down the rabbit hole. They just showed up. HOWEVER! The restrictors that came in my carb are different looking. By this I mean the actual jet outlet hole. My old ones were off center and with no crown cut into the face. The new ones are perfectly centered and have a small c...
by BigBlue94
Tue Apr 23, 2019 10:12 am
Forum: 240-300 "Big Block" Six Performance
Topic: 300 torque build 85 Bronco
Replies: 313
Views: 15888

Re: 300 torque build 85 Bronco

Yes, these were behind the power valve in the metering block. My number drills only go down to .040" and that one wouldn't fit. Found an old spark plug gap tool with wires and the smallest was .035", and it fit perfectly. Maybe .001 under size at the most. No, there were no markings on the...
by BigBlue94
Mon Apr 22, 2019 7:50 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 300 torque build 85 Bronco
Replies: 313
Views: 15888

Re: 300 torque build 85 Bronco

Found the exhaust leak... remflex gasket blew out of the #4 header flange.
by BigBlue94
Mon Apr 22, 2019 7:29 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 300 torque build 85 Bronco
Replies: 313
Views: 15888

Re: 300 torque build 85 Bronco

Best I could measure, the hole in my PC restrictors is .035, matching the stat on my card for a high speed bleed

Yes 6-32
by BigBlue94
Mon Apr 22, 2019 6:51 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 300 torque build 85 Bronco
Replies: 313
Views: 15888

Re: 300 torque build 85 Bronco

Just ordered those .035 and .040 restrictors and next day aired them
by BigBlue94
Mon Apr 22, 2019 6:44 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 300 torque build 85 Bronco
Replies: 313
Views: 15888

Re: 300 torque build 85 Bronco

I tried the larger .059 jets and wow, terribly rich at idle. Gotta wait for the headers to cool and pull the front bowl. I'll go back to the .055 jets and check the pv restrictor. I found one loose header nut, and made some spacers to even the clamps out between header and intake flange thickness. N...
by BigBlue94
Mon Apr 22, 2019 6:01 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 300 torque build 85 Bronco
Replies: 313
Views: 15888

Re: 300 torque build 85 Bronco

Indeed it was, dry rotted it appears. Good thing I had a brand new spare in the old 390.
by BigBlue94
Mon Apr 22, 2019 5:40 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 300 torque build 85 Bronco
Replies: 313
Views: 15888

Re: 300 torque build 85 Bronco

Accelerator pump leaks upon throttle return... I assume its ruptured?
by BigBlue94
Mon Apr 22, 2019 5:14 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 300 torque build 85 Bronco
Replies: 313
Views: 15888

Re: 300 torque build 85 Bronco

Is the exhaust leak at the head causing me issues with the AFR readings?