Search found 2363 matches

by pmuller9
Tue Nov 20, 2018 12:42 am
Forum: 240-300 "Big Block" Six Performance
Topic: Roller Rocker Question
Replies: 1
Views: 19

Re: Roller Rocker Question

The SBF rockers are also too short to reach the valve stem. The fulcrum length needs to be 1.65"
The Ford 429/460 rockers will also work.
by pmuller9
Mon Nov 19, 2018 11:04 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Ford 300 build
Replies: 1
Views: 42

Re: Ford 300 build

You need a lot larger cam and carburetor to get your power goals You don't have to worry about a 300 six losing it's ability to be a daily driver with large cams and carbs. We have a 300 six here with a 288* cam, 232* .050" duration, 534" valve lift getting 18 mpg highway @ 70 mph, 15 mpg ...
by pmuller9
Mon Nov 19, 2018 10:34 pm
Forum: 240-300 "Big Block" Six Performance
Topic: inline 6 newbie, timing gear question
Replies: 11
Views: 142

Re: inline 6 newbie, timing gear question

The fine tooth gears sounds like a great idea for changing cam timing. The stock cam is normally installed with the intake lobe center at 114 degrees ATDC crankshaft position. The cam gets advanced 4 degrees so the intake lobe center is now at 110 degrees ATDC crankshaft position. When you are check...
by pmuller9
Mon Nov 19, 2018 6:27 pm
Forum: 240-300 "Big Block" Six Performance
Topic: timing issue on 240 or??/ Helllpppp!
Replies: 11
Views: 99

Re: timing issue on 240 or??/ Helllpppp!

The one piece pan gasket is for the later 4.9s The bolt holes in your oil pan should be dimpled forming a lip to hold the gasket in place? If so then you need the multi piece gasket Have you determined for sure that the timing gears are bad? Is the crankshaft bolt for the harmonic balancer tight? It...
by pmuller9
Mon Nov 19, 2018 6:06 pm
Forum: 240-300 "Big Block" Six Performance
Topic: timing issue on 240 or??/ Helllpppp!
Replies: 11
Views: 99

Re: timing issue on 240 or??/ Helllpppp!

Metal gears usually don't strip with street cams so I suspect a fiber gear also.
If it is the timing gears you will need to clean out the oil pan.
by pmuller9
Mon Nov 19, 2018 5:52 pm
Forum: 240-300 "Big Block" Six Performance
Topic: timing issue on 240 or??/ Helllpppp!
Replies: 11
Views: 99

Re: timing issue on 240 or??/ Helllpppp!

If there is a spot where the crank is turning and the cam is not then the timing gears have teeth missing.
by pmuller9
Mon Nov 19, 2018 4:51 pm
Forum: 240-300 "Big Block" Six Performance
Topic: timing issue on 240 or??/ Helllpppp!
Replies: 11
Views: 99

Re: timing issue on 240 or??/ Helllpppp!

I'm real fearful its timing gears. any way to know for sure before you tear it down? As MechRick pointed out if the ignition timing is correct then the camshaft timing should also be good. Use a timing light on #1 plug wire to see if the ignition timing is still 10* BTDC while the engine is crankin...
by pmuller9
Mon Nov 19, 2018 8:41 am
Forum: 240-300 "Big Block" Six Performance
Topic: Carb head combustion chamber question.
Replies: 29
Views: 742

Re: Carb head combustion chamber question.

If you want a more aggressive cam with more midrange for running through mud and be able to use a higher compression ratio then I suggest Jones Cam hydraulic, F300-I6, H72334, L/C 108 along with the J875H lifters. Cam specs: Seat Duration 288* .050" Duration 232* Valve lift with 1.6 rocker .534...
by pmuller9
Sun Nov 18, 2018 10:53 pm
Forum: 240-300 "Big Block" Six Performance
Topic: inline 6 newbie, timing gear question
Replies: 11
Views: 142

Re: inline 6 newbie, timing gear question

The Mr Gasket 987G offset key used on the cam gear will give you a 4 degree change in crank timing.
I used the 1983 Ford iron cam gear set and it was very quite.
by pmuller9
Sun Nov 18, 2018 2:47 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Carb head combustion chamber question.
Replies: 29
Views: 742

Re: Carb head combustion chamber question.

Still thinking the Crane 500211 cam but I'm not committed to it. My plans have changed so much and this is not an every day driver . I also don't mind the near constant tinkering something radical requires on the street. The initial plans was to go off road occasionally and play in the mud and/or d...
by pmuller9
Sun Nov 18, 2018 2:29 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Carb head combustion chamber question.
Replies: 29
Views: 742

Re: Carb head combustion chamber question.

Additionally is there a calculator for required octane? Octane requirement for the Ford 300 six based on the many 300 engine builds on this site indicates a Dynamic Compression Ratio range from 7.0 to 7.5 with gas octane from 87 to 93 respectively. The DCR is calculated using the intake valve's clo...
by pmuller9
Sun Nov 18, 2018 1:48 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 68 F100 Upgrade suggestions
Replies: 10
Views: 251

Re: 68 F100 Upgrade suggestions

A new JR head has small 66 cc chamber. The recommended off the shelf cams should have a .050" duration in the 220* range and an advertised duration of 280* or more. With that as a given the range of compression ratios are from 9:1 to 9.5:1 with pump gas octane from 87 to 93 respectively. Cams i...
by pmuller9
Sun Nov 18, 2018 9:43 am
Forum: 240-300 "Big Block" Six Performance
Topic: Basic build
Replies: 14
Views: 462

Re: Basic build

What I wanted know about was the strength of the Ford pedestal rocker system in particular. Are you saying it’s about the same as a traditional stud mounted, ball pivot rocker? I’ll likely be reworking to another rocker, just learning what I can at this point. It's the same pedestal and rocker that...
by pmuller9
Sat Nov 17, 2018 11:14 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Basic build
Replies: 14
Views: 462

Re: Basic build

PM, How much spring force can the pedestal rocker handle? A stamped rocker should be limited to .500" valve lift and 300 lbs spring pressure. We've seen one case on a pivot ball rocker where the rocker and ball would lose it's lubrication and squeek. There was plenty of oil soaking the rockers...
by pmuller9
Sat Nov 17, 2018 3:09 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Basic build
Replies: 14
Views: 462

Re: Basic build

I am looking for the same thing with my 85 F250. Will that cam be a direct replacement? or will other modifications need to be completed in the valve train? The stock valve springs will be tired from age and you may get valve float at higher rpm. The stock spring rate is low to begin with. If you c...
by pmuller9
Sat Nov 17, 2018 12:33 pm
Forum: 240-300 "Big Block" Six Performance
Topic: EQ CH300 Head
Replies: 1
Views: 106

Re: EQ CH300 Head

The EQ head is a heavier casting than stock EFI head. Just ask Bruce (WorldChampGramp) who is lifting both to and from the flow bench. LOL I feel safe in saying that more than half of the wrecking yard EFI heads fail magnaflux testing. What Bruce found was; an EQ head with modified combustion chambe...
by pmuller9
Sat Nov 17, 2018 1:21 am
Forum: Electrical, Audio, and Electronics
Topic: calculating a vehicles amperage needs
Replies: 1
Views: 78

Re: calculating a vehicles amperage needs

A larger alternator has less internal resistance than a smaller output alternator and thereby generates less heat for a given load current. Technically speaking the larger alternator has less "I squared R" loss. The second problem occurs when a large capacity battery system is allowed to d...
by pmuller9
Sat Nov 17, 2018 12:14 am
Forum: 240-300 "Big Block" Six Performance
Topic: opinions on a b.b. 300 in school bus
Replies: 18
Views: 307

Re: opinions on a b.b. 300 in school bus

What do you have left for 300 blocks, crank and heads?

Do you still have the HD exhaust manifold?
by pmuller9
Fri Nov 16, 2018 3:59 pm
Forum: Turbo, Supercharger, and Nitrous
Topic: Centrifugal Supercharger vs Turbocharger Advice
Replies: 4
Views: 100

Re: Centrifugal Supercharger vs Turbocharger Advice

A Centrifugal Supercharger makes boost proportional to rpm which is opposite of what you are looking for. I'm assuming this is for your 200 six with a stock head? You need a turbocharger with a 47mm compressor inducer and a T3, .64 A/R turbine housing. One of the main keys is not to overcam your eng...
by pmuller9
Thu Nov 15, 2018 3:34 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Hedman Headers 500-89300 (240/300 ci) long tube
Replies: 4
Views: 110

Re: Hedman Headers 500-89300 (240/300 ci) long tube

The big six has a bore spacing of 4.48", the small six is 4.08"
The big six has evenly spaced ports, the small six spacing is different between ports

I obviously don't know the story here but why not use a header made for the small six?
by pmuller9
Thu Nov 15, 2018 3:24 pm
Forum: Turbo, Supercharger, and Nitrous
Topic: F-250 super cab 4x4 300 Turbo
Replies: 34
Views: 1402

Re: F-250 super cab 4x4 300 Turbo

Turbo Cam suggestion: https://www.dropbox.com/s/qufkzkwyxoz8or9/Crower%20Cam.jpg?dl=0 The compression ratio should to be in the lower 8s Use the KB 3117H pistons on stock rods and zero deck the block. Grind the forging lines off the rod beams, polish the beams and have the rods shot peened. Resize w...
by pmuller9
Thu Nov 15, 2018 10:36 am
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 312
Views: 22443

Re: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress

The JR head comes with 4.91" long valves to accommodate valve lifts over .550". It also allows valve spring installed heights between 1.700" and 1.800" The stock EFI valves are 4.750". You still will need to work on geometry and possibly longer pushrods. No immediate plans f...
by pmuller9
Wed Nov 14, 2018 11:36 pm
Forum: 240-300 "Big Block" Six Performance
Topic: opinions on a b.b. 300 in school bus
Replies: 18
Views: 307

Re: opinions on a b.b. 300 in school bus

Is there room for a 300 six with a turbocharger?
by pmuller9
Wed Nov 14, 2018 10:59 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 312
Views: 22443

Re: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress

Very good questions. The Crane 96803 single spring will handle most of the off the shelf hydraulic street cams. A single spring will work with the cast locator on the head so no machining is required. If a dual spring is needed the the locator will need to be machined to a smaller diameter.. We can ...
by pmuller9
Wed Nov 14, 2018 12:01 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Carb head combustion chamber question.
Replies: 29
Views: 742

Re: Carb head combustion chamber question.

Where did you get that figure? I didn't add the area around the pison down to the rings, but does that really equate to that many more cubes? Please check my math. Area of the bore: (4.050)/2 squared = 4.100625 4.100625 x 3.1416 = 12.882523 Volume of the cylinder: 12.882523 x 3.98 = 51.272441 Engin...
by pmuller9
Wed Nov 14, 2018 9:25 am
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 312
Views: 22443

Re: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress

I talked with Bruce yesterday and everything is in place at the shop to produce the JR head. We just need to complete the transaction here to become a qualified vendor. Please private message Bruce "WorldChampGramp" and let him know that you need a JR head. Any one else needing a JR head p...
by pmuller9
Tue Nov 13, 2018 10:33 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Rod Bearing width, etc.
Replies: 11
Views: 418

Re: Rod Bearing width, etc.

Usually just the two ends, 1 and 6. You may first want to check all six rods and pistons in the same hole to see if their total height is the same. If not then you can use the closest two for measuring deck height. While the pistons are in the hole check the height over both ends of the wrist pin to...
by pmuller9
Tue Nov 13, 2018 4:29 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Carb head combustion chamber question.
Replies: 29
Views: 742

Re: Carb head combustion chamber question.

It's called a Burret.
It's found in Cylinder Head cc kits.
by pmuller9
Tue Nov 13, 2018 11:56 am
Forum: 240-300 "Big Block" Six Performance
Topic: Carb head combustion chamber question.
Replies: 29
Views: 742

Re: Carb head combustion chamber question.

Cylinder swept volume is 51.272
Engine displacement is 307.634

It is important that GPGoverMPG reads post #13 and doesn't do any further chamber volume work except to get them all about the same.
by pmuller9
Tue Nov 13, 2018 9:52 am
Forum: 240-300 "Big Block" Six Performance
Topic: Carb head combustion chamber question.
Replies: 29
Views: 742

Re: Carb head combustion chamber question.

My calculations show that you are at 9.425 compression ratio right now. Stop! You will have to wait to see what the volume is with the new valves installed. If both valves have a dished head like the ones shown in the link in post #6 you might? add more volume to the chamber. Head = 83cc Piston = 8c...
by pmuller9
Mon Nov 12, 2018 11:24 pm
Forum: Turbo, Supercharger, and Nitrous
Topic: F-250 super cab 4x4 300 Turbo
Replies: 34
Views: 1402

Re: F-250 super cab 4x4 300 Turbo

What did you decide on for connecting rods and pistons?
by pmuller9
Mon Nov 12, 2018 10:40 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Plenum Intake Base Line
Replies: 14
Views: 347

Re: Plenum Intake Base Line

If you open the throttle slowly can you get the engine to rev?
by pmuller9
Mon Nov 12, 2018 6:15 pm
Forum: Buy, Sell, or Trade - Misc Parts
Topic: Turbonetics turbocharger and wastegate for sale
Replies: 5
Views: 110

Re: Turbonetics turbocharger and wastegate for sale

Thanks for the reply.
It is the right size for a 300 six with ported big valve head, larger street cam looking to make 500+ hp
by pmuller9
Mon Nov 12, 2018 3:19 pm
Forum: 240-300 "Big Block" Six Performance
Topic: "180" degree crank SIX CYLINDER hi-torque engine
Replies: 10
Views: 249

Re: "180" degree crank SIX CYLINDER hi-torque engine

It wouldn't be crank trigger for sure.

Coil on or near plug would work if it was triggered by a three pole distributor signal.
The coils can be triggered two at a time.
by pmuller9
Mon Nov 12, 2018 1:29 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Chevy Rocker question
Replies: 12
Views: 206

Re: Chevy Rocker question

Just a side note: The lifter spacing is more than the valve stem spacing so the pushrods come up at an angle. The center to center spacing at the valves and rocker studs are close to 1.90" The pushrod spacing is about 1.94" at the pushrod guides. When you tighten the rocker studs you may w...
by pmuller9
Mon Nov 12, 2018 11:53 am
Forum: 240-300 "Big Block" Six Performance
Topic: Plenum Intake Base Line
Replies: 14
Views: 347

Re: Plenum Intake Base Line

Would you post a picture of your intake manifold and carbs?
by pmuller9
Mon Nov 12, 2018 10:12 am
Forum: Turbo, Supercharger, and Nitrous
Topic: Henry Yunicks Red Hot Vapor Engine Re-Creation
Replies: 68
Views: 2837

Re: Henry Yunicks Red Hot Vapor Engine Re-Creation

This still seems like a risky proposition especially if pump gas containing ethanol gets into the mix.
The ethanol will release oxygen making the fuel in the chamber combustible I would think?
by pmuller9
Mon Nov 12, 2018 9:33 am
Forum: 240-300 "Big Block" Six Performance
Topic: Chevy Rocker question
Replies: 12
Views: 206

Re: Chevy Rocker question

Get the SBC rocker arm pivot balls that fit a 3/8" stud.
Your local auto parts stores should carry them.

The ones pictured here have grooves for better oiling.
https://www.summitracing.com/parts/cca- ... /chevrolet.

I hope I got it right this time. LOL
by pmuller9
Sun Nov 11, 2018 10:48 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 68 F100 Upgrade suggestions
Replies: 10
Views: 251

Re: 68 F100 Upgrade suggestions

The stock 300 cam has a 268 degree advertised duration. If your 300 has an compression ratio in the high 8s then it will except low octane pump gas much better with a 268 cam or greater. Here is a list of most of the "off the shelf" cams for the 300 six with the stock cam specs at the top....
by pmuller9
Sun Nov 11, 2018 10:26 pm
Forum: Turbo, Supercharger, and Nitrous
Topic: Henry Yunicks Red Hot Vapor Engine Re-Creation
Replies: 68
Views: 2837

Re: Henry Yunicks Red Hot Vapor Engine Re-Creation

The AC generator looks good. An automotive ignition coil cannot begin to supply the amount of power needed for the arc. A MOT puts out around 2kv. Two in series (Parallel primaries) would give you 4kv and 2000 watts. Once an arc is struck the resistance goes low and the transformer curent goes very ...
by pmuller9
Sun Nov 11, 2018 10:00 pm
Forum: 240-300 "Big Block" Six Performance
Topic: "180" degree crank SIX CYLINDER hi-torque engine
Replies: 10
Views: 249

Re: "180" degree crank SIX CYLINDER hi-torque engine

On the conventional V8 engine with a 90* crank, each bank has two 90*, one 45* and one 135* power stroke spacing. With a 180* crank each bank has evenly spaced 90* power strokes. The intake manifold has better distribution and the exhaust headers provide better scavenging. In either case no two cyli...
by pmuller9
Sun Nov 11, 2018 8:02 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Chevy Rocker question
Replies: 12
Views: 206

Re: Chevy Rocker question

I misunderstood what you were looking for.
I will bow out of this discussion.
by pmuller9
Sun Nov 11, 2018 6:52 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Chevy Rocker question
Replies: 12
Views: 206

Re: Chevy Rocker question

The only option you have is the Scorpion pedestal mount roller rocker with a 1.73 ratio. https://www.summitracing.com/parts/scc-scp1059/overview/make/ford That is not correct. https://fordsix.com/viewtopic.php?f=2&t=71967&p=552938&hilit=36655+16#p552938 https://fordsix.com/viewtopic.php...
by pmuller9
Sun Nov 11, 2018 5:36 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Chevy Rocker question
Replies: 12
Views: 206

Re: Chevy Rocker question

The one option you have is the Scorpion pedestal mount roller rocker with a 1.73 ratio.
https://www.summitracing.com/parts/scc- ... /make/ford

What I don't know is if the Ford V8 rockers will work?
https://www.summitracing.com/parts/slp- ... /make/ford
by pmuller9
Sun Nov 11, 2018 3:44 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Carb head combustion chamber question.
Replies: 29
Views: 742

Re: Carb head combustion chamber question.

You missed a lot. The OP wants to use a 390 FE piston that only has 8cc valve pockets. He is trying to lower the compression ratio down to 9.4 by increasing the volume in the combustion chamber. 76 cc chamber is only a specification and can vary quite a bit plus some material was removed by opening ...
by pmuller9
Sun Nov 11, 2018 3:30 pm
Forum: Turbo, Supercharger, and Nitrous
Topic: Henry Yunicks Red Hot Vapor Engine Re-Creation
Replies: 68
Views: 2837

Re: Henry Yunicks Red Hot Vapor Engine Re-Creation

Looking at the how to accomplish this for worse case power at 2000 watts. 2K watts is 143 amps on a 14 volt vehicle system. There should be a 250 to 300 amp alternator to supply the 143 amps plus the rest of the vehicle power requirements. Next: What method will you use to convert from 14 volts dc t...
by pmuller9
Sun Nov 11, 2018 1:20 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Carb head combustion chamber question.
Replies: 29
Views: 742

Re: Carb head combustion chamber question.

Here is a picture of an 1986 chamber (Same size as yours) with 2.02 intake and 1.60 exhaust valves. https://www.dropbox.com/s/9dpif5xrxob8gpm/DSC01520.JPG?dl=0 A head gasket fire ring is too large to use as a scribe line. As an example, the Felpro 1024 gasket is 4.180" I also don't trust the al...
by pmuller9
Sat Nov 10, 2018 10:47 pm
Forum: Buy, Sell, or Trade - Misc Parts
Topic: Turbonetics turbocharger and wastegate for sale
Replies: 5
Views: 110

Re: Turbonetics turbocharger and wastegate for sale

Why are you selling the turbo?
by pmuller9
Sat Nov 10, 2018 10:44 pm
Forum: Turbo, Supercharger, and Nitrous
Topic: Henry Yunicks Red Hot Vapor Engine Re-Creation
Replies: 68
Views: 2837

Re: Henry Yunicks Red Hot Vapor Engine Re-Creation

How much voltage would you need for the arc?
by pmuller9
Sat Nov 10, 2018 10:34 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Carb head combustion chamber question.
Replies: 29
Views: 742

Re: Carb head combustion chamber question.

I'm using a 150cc syringe, Lexan, and Marvel mystery oil to cc the chambers. Any ideas on getting the bubbles out from under the Lexan? Thanks Looks good so far! Seal the Lexan to the head with a coat of grease. Position the hole in the Lexan so it is on the edge of the combustion chamber and tilt ...

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