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Search found 3071 matches

by pmuller9
Mon Jun 17, 2019 10:05 am
Forum: 240-300 "Big Block" Six Performance
Topic: So I have a plan but now im Second guessing myself.
Replies: 40
Views: 733

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

Review There is one group of Hypereutectic pistons that are advertised at 22cc dish volume. They should be checked for accuracy once you get them. The few other possibilities have either way too little or to much volume. The compression ratio should limited to 9:1 for 87 octane gas with the Schneide...
by pmuller9
Mon Jun 17, 2019 9:43 am
Forum: 240-300 "Big Block" Six Performance
Topic: Turboing a stock 300, how to make it last?
Replies: 24
Views: 1047

Re: Turboing a stock 300, how to make it last?

The Speed Pro H554CP crosses over to the Silvolite 3158HP. The Silvolite 3158H does not have the coating which is my preference since the coating doesn't seem to stay on after many miles. Anyway you have 3 pistons to choose from. If you do the math for the dish volume for all three (0.300 inch deep ...
by pmuller9
Sun Jun 16, 2019 11:48 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Turboing a stock 300, how to make it last?
Replies: 24
Views: 1047

Re: Turboing a stock 300, how to make it last?

You need a compression ratio in the low 8s to use 87 octane pump gas. If you are using the 1988 head then you will need the Speed Pro H554CP 30 pistons. The dish volume should be over 30cc and will give you a little room to deck the block to clean up the surface. Leave the pistons at least .025"...
by pmuller9
Sun Jun 16, 2019 9:48 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Turboing a stock 300, how to make it last?
Replies: 24
Views: 1047

Re: Turboing a stock 300, how to make it last?

88F15088 wrote:What would be a decent off the shelf (i.e. cheap) cam that would work well with 8lbs of boost on a lightly ported head?
I am ready to take the stock motor apart and build it for low boost.


What rpm range do you want to make power?
Which exhaust manifold are you going to use?
by pmuller9
Sun Jun 16, 2019 9:17 pm
Forum: 240-300 "Big Block" Six Performance
Topic: So I have a plan but now im Second guessing myself.
Replies: 40
Views: 733

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

That is the calculator I use also but I use the intake valve closing point based on the .006" lobe lift point (advertised duration) not the .050" plus 15 degrees. There are too many variations between the advertised and .050 durations on camshafts. For the purposes of detonation, DCR is si...
by pmuller9
Sun Jun 16, 2019 9:16 am
Forum: 240-300 "Big Block" Six Performance
Topic: Another piston question
Replies: 17
Views: 457

Re: Another piston question

There are differences. The 142F cam will pull hard to 5500 rpm and shouldn't be limited by the smaller carbs where power is falling off after 5000 rpm. The 142F cam is also not so large where the WOT engine response needs to compensated by using a smaller carb especially considering the very long ru...
by pmuller9
Sat Jun 15, 2019 10:25 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Another piston question
Replies: 17
Views: 457

Re: Another piston question

The 1.14s are only 300 cfm each for a total of 600 cfm which is equivalent to a 425 cfm 4 barrel carb.
The 300 six with the Schneider 142F cam and big valve ported head requires a 650 cfm 4 barrel to maximize performance.

It would be ok to use a pair of 1.23 or 1.33 carbs
by pmuller9
Sat Jun 15, 2019 10:07 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 1988 F150 300 top end rebuild
Replies: 6
Views: 189

Re: 1988 F150 300 top end rebuild

So what’s the most common way to make power? Remove the EFI for carb? My state no longer requires emissions testing, especially for cars pre 95. That depends on how much more power do you want? The cam change I suggested will increase the low to midrange power. Beyond that it gets much more involve...
by pmuller9
Sat Jun 15, 2019 11:50 am
Forum: 240-300 "Big Block" Six Performance
Topic: Another piston question
Replies: 17
Views: 457

Re: Another piston question

Are those flat-top pistons that you modified? Is there still a flat quench area? If so I would try to achieve .040" to .050" piston to head distance. They are flat tops with 4 centered valve pockets. I agree with Max. Keep the pistons at .010" in the hole for a .050" quench dist...
by pmuller9
Wed Jun 12, 2019 11:36 am
Forum: 240-300 "Big Block" Six Performance
Topic: Vacuum Secondaries
Replies: 23
Views: 573

Re: Vacuum Secondaries

The tuning kit with it with a selection of metering rods and jets. The book is easy to understand, and the jets/rods/springs are easy to change. It is a great little carb. He will be using a big 242 degree solid lifter cam and will need more than a 500 cfm carb. The Quick Fuel HR 650 is very tunabl...
by pmuller9
Wed Jun 12, 2019 11:29 am
Forum: 240-300 "Big Block" Six Performance
Topic: Vacuum Secondaries
Replies: 23
Views: 573

Re: Vacuum Secondaries

Sandboxer Average flow is not the issue and is a poor way to measurer the flow requirements of the induction system. The 300 six has 50 cu inch cylinder volumes, equivalent to a 400 ci in. V8. It is the peak flow, not the average flow that is the more important consideration with a big six. The othe...
by pmuller9
Tue Jun 11, 2019 9:37 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 240 valve size?
Replies: 2
Views: 103

Re: 240 valve size?

SI valves have the 1.94/1.60 valves in the stock 240/300 length which is 4.810" The Chevy valves are longer at 4.910" The last few 300 builds have been using cams with the .050" duration around 220 degrees . The 240 would work well with .050" durations in the 210 to 214 degree ra...
by pmuller9
Tue Jun 11, 2019 4:47 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 240 / 300 inline 6 spark plug size
Replies: 2
Views: 152

Re: 240 / 300 inline 6 spark plug size

All 300 six heads use the 18mm spark plug.
It is possible to install inserts to adapt 14mm spark plugs.
by pmuller9
Mon Jun 10, 2019 12:50 pm
Forum: 240-300 "Big Block" Six Performance
Topic: catalog of conceptual build plans for the b.b.ford sticky
Replies: 39
Views: 3624

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

There are timing marks on the timing cover which is on the front driver side of the engine and there is a timing tab that bolts to the front passenger side of the timing cover. Typically the mark on the harmonic balancer lines up with the passenger side timing tab when #1 piston is at TDC. If you lo...
by pmuller9
Sun Jun 09, 2019 10:49 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Vacuum Secondaries
Replies: 23
Views: 573

Re: Vacuum Secondaries

Anyone have experience with a 450 double pumper? I need to decide on my induction soon, so this thread is of the highest importance at this point for me. 10:1 Schneider 142F 300 rods I have two Carter BBD (285 cfm) carbs that are an option to a 4 barrel mechanical. The 450 double pumper is a distin...
by pmuller9
Sun Jun 09, 2019 8:57 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Vacuum Secondaries
Replies: 23
Views: 573

Re: Vacuum Secondaries

The CFM requirement of the 300 is low... maybe 175 CFM at 2000 RPM. 156.25 @ 90% VE That is only part of the story. The 300 six has 34% more cylinder volume than the equivalent V8. While the average volume flow may be the same for a given rpm and VE, the peak flow and "Gulp" volume is muc...
by pmuller9
Sun Jun 09, 2019 8:49 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Correct Timing Marks 240 & 300
Replies: 9
Views: 219

Re: Correct Timing Marks 240 & 300

Why not just bring the number 1 piston to TDC and see where the mark on the harmonic balancer is.
by pmuller9
Sun Jun 09, 2019 9:23 am
Forum: 144-250 "Small Block" Six Performance
Topic: Valve train clatter
Replies: 14
Views: 295

Re: Valve train clatter

Take each cylinder one at a time starting with #1 Turn the crank clockwise until the EXHAUST valve just begins to open and stop. Then adjust the INTAKE valve with 1/2 turn past zero lash. Now turn the crank clockwise again till the INTAKE valve opens and begins to close. Just as the intake valve clo...
by pmuller9
Sat Jun 08, 2019 12:02 am
Forum: 240-300 "Big Block" Six Performance
Topic: Vacuum Secondaries
Replies: 23
Views: 573

Re: Vacuum Secondaries

Thanks Jason. Great info! For the longest time 300 six builds have been under cammed and now most are being assembled with 268 cams and larger with very good results. Now I believe we are limiting engine response by under carbureting these engines. It sounds reasonable to have the secondaries contro...
by pmuller9
Fri Jun 07, 2019 10:01 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Vacuum Secondaries
Replies: 23
Views: 573

Vacuum Secondaries

There have been several 300 six engine performance engine builds with large valve, mild ported heads and street performance cams that are producing smooth, wide power bands but feel like they are lacking the low end kick that was expected. I have not used a vacuum secondary carburetor on a 300 six b...
by pmuller9
Fri Jun 07, 2019 11:01 am
Forum: 240-300 "Big Block" Six Performance
Topic: 1988 F150 300 top end rebuild
Replies: 6
Views: 189

Re: 1988 F150 300 top end rebuild

As Harte3 said, all sensors and equipment must remain in operation for the EFI system to work properly. If you add a small cam that has less than the stocks cam's 268 advertised duration you will have problems with detonation and would end up having to use premium octane gas. The Schneider 135H (139...
by pmuller9
Thu Jun 06, 2019 11:04 pm
Forum: Turbo, Supercharger, and Nitrous
Topic: Turbo US200 Crossflow
Replies: 35
Views: 684

Re: Turbo US200 Crossflow

As previously mentioned the turbo is big for a 200 cu in engine but you can run the 246/246 cam and push the rpm to keep the turbo happy. The idle will need to be high around 1200 rpm. For street use I would prefer to see 246/238 on a 114 LSA. It would be much easier to tune and improve low end resp...
by pmuller9
Thu Jun 06, 2019 10:45 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Looking for input on a mild build 300 daily driver F250 4WD
Replies: 3
Views: 272

Re: Looking for input on a mild build 300 daily driver F250 4WD

The 1984 head has stud mount rockers while the 1985 head has pedestal mount rockers. The “84 head will need to have the studs pulled and drilled and tapped for screw in studs. The “85 head can be drilled and tapped for screw in studs also but would need pushrod guide plates. The Scorpion 1059 1.73 r...
by pmuller9
Thu Jun 06, 2019 10:20 pm
Forum: Turbo, Supercharger, and Nitrous
Topic: Turbo US200 Crossflow
Replies: 35
Views: 684

Re: Turbo US200 Crossflow

Don't worry about getting springs from the cam supplier.
You can get springs elsewhere.
Comp Cams has a conical spring that will work very well for your application.
Comp 7228, 136@1.800" with a 438 lbs/in spring rate.

What will the valve stem diameter be?
by pmuller9
Wed Jun 05, 2019 7:03 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 460 rollers
Replies: 2
Views: 199

Re: 460 rollers

I don’t see a problem with cutting a channel from the oiling hole down to the oil band on both ends.
by pmuller9
Wed Jun 05, 2019 6:53 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Looking for input on a mild build 300 daily driver F250 4WD
Replies: 3
Views: 272

Re: Looking for input on a mild build 300 daily driver F250 4WD

How much of this engine build are you going to do yourself?
by pmuller9
Wed Jun 05, 2019 6:14 pm
Forum: Turbo, Supercharger, and Nitrous
Topic: Turbo US200 Crossflow
Replies: 35
Views: 684

Re: Turbo US200 Crossflow

The 253/253 single pattern cam from Cam-tech has two shortcomings. First it has way too much duration for the rpm range and power band you want the engine to run at. Second if a log type manifold is being used rather than a long tube header, a profile with less exhaust duration will run with higher ...
by pmuller9
Mon Jun 03, 2019 6:45 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Tractor Puller
Replies: 157
Views: 15217

Re: Tractor Puller

Those are good numbers on the Comp springs. So far, I've not been able to find someone in Western Canada that can do micro polishing. I do have access to someone that does this.Screen Shot 2019-06-02 at 10.10.26 PM.png Great looking counter weight mods and finish. What type of surface finish is it?
by pmuller9
Sun Jun 02, 2019 7:35 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Tractor Puller
Replies: 157
Views: 15217

Re: Tractor Puller

Mechanical roller cams require much more spring than a solid flat tappet cam because of the high ramp rate of the roller cam. One of our BBC roller cams is 300 lbs closed and 800 lbs at .700” lift. The Comp 7228 conical spring will give you around 400 lbs open at .600” lift which should keep the lif...
by pmuller9
Sat Jun 01, 2019 10:40 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Tractor Puller
Replies: 157
Views: 15217

Re: Tractor Puller

Take a look at Comp conical single spring 7228-12 with retainer 787-12
It would have to be installed at 1.800"
Pricey but will hold it's spring rate a lot longer than the straight wound springs.
The reduced spring and retainer mass will help with high rpm valve train stability.
by pmuller9
Sat Jun 01, 2019 2:26 pm
Forum: Turbo, Supercharger, and Nitrous
Topic: Question on my air fuel ratio on my supercharger wagon
Replies: 22
Views: 527

Re: Question on my air fuel ratio on my supercharger wagon

Yes the 3.5 power valve is good.
Yes on two main jet sizes down on the primaries to see if it leans out the 50 mph cruise air fuel ratio.
by pmuller9
Sat Jun 01, 2019 7:26 am
Forum: 240-300 "Big Block" Six Performance
Topic: Tractor Puller
Replies: 157
Views: 15217

Re: Tractor Puller

The cam card is mixed. Schneider subtracts the valve lash for actual valve lift. Cam card lift calculations are actually based on a 1.75 ratio rocker even though the card shows 1.7 Intake lobe lift .365" x 1.75 = .639" - .020" valve lash = .619" Exhaust lobe lift .370" x 1.7...
by pmuller9
Fri May 31, 2019 11:41 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Tractor Puller
Replies: 157
Views: 15217

Re: Tractor Puller

Looks like the Schneider 304-14F.

Check the base circle of every lobe.
Seen a big Schneider cam where one lifter was scrubbing the core material which was higher than the heal of the lobe.

Are you going to use 1.75 ratio rockers?
by pmuller9
Fri May 31, 2019 11:11 pm
Forum: 240-300 "Big Block" Six Performance
Topic: C5AE rods
Replies: 54
Views: 1649

Re: C5AE rods

Try installing six sets of roller lifters in the block without the cam in place.
by pmuller9
Fri May 31, 2019 9:10 pm
Forum: 144-250 "Small Block" Six Performance
Topic: Do we really need a modern ignition?
Replies: 36
Views: 1053

Re: Do we really need a modern ignition?

I run a Pertronix but keep the points-cond. in the glove box just in case. Why? What happen to " Do NOT believe those who talk about constantly having to change/adjust points. Every 5,000 miles is usually fine...which is coast-to-coast driving. I understand many will disagree, but physics is o...
by pmuller9
Fri May 31, 2019 8:53 pm
Forum: 240-300 "Big Block" Six Performance
Topic: C5AE rods
Replies: 54
Views: 1649

Re: C5AE rods

Looking Good!
See if you can get six sets in the block without the camshaft.
by pmuller9
Thu May 30, 2019 10:32 pm
Forum: 240-300 "Big Block" Six Performance
Topic: So I have a plan but now im Second guessing myself.
Replies: 40
Views: 733

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

It would be interesting at this point to see a video of yours running. I'm excited to get mine together. Here is a video of the Erson cam equivalent E270321 (Hi-Flow AH) .504"/.504" 220/220 284/284 110deg. https://youtu.be/Ah7alvyiYT0 This is also one of the engines that had squeaky stamp...
by pmuller9
Thu May 30, 2019 9:44 pm
Forum: 144-250 "Small Block" Six Performance
Topic: Do we really need a modern ignition?
Replies: 36
Views: 1053

Re: Do we really need a modern ignition?

Distributor advance curve is the key to improved idle, power, drive ability & economy. Absolutely. This includes actual ignition timing. There are a lot of engine builds presently going on and how many take the time to verify that the timing mark TDC is really piston TDC before installing the h...
by pmuller9
Thu May 30, 2019 9:22 pm
Forum: 240-300 "Big Block" Six Performance
Topic: So I have a plan but now im Second guessing myself.
Replies: 40
Views: 733

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

The reason for a little concern using the stamped rockers over .500" lift has to do with the extra pressure on the pivot ball causing squeaking. Also need to check the pattern on the valve stem tip. Otherwise there is some performance to be gained with the extra lift and duration from the incre...
by pmuller9
Thu May 30, 2019 1:17 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Improvements To My 300 Motor
Replies: 23
Views: 784

Re: Improvements To My 300 Motor

With any carb on the 300 six it needs to be tuned to the engine.
The 350 cfm may be running rich at larger throttle openings
You need an air/fuel ratio meter to know what is carb is doing through-out the load range.

The higher ratio rockers will not hurt fuel mileage if the engine is tuned properly.
by pmuller9
Thu May 30, 2019 10:34 am
Forum: 240-300 "Big Block" Six Performance
Topic: So I have a plan but now im Second guessing myself.
Replies: 40
Views: 733

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

You will want to use a 1.6 ratio rocker with the 140H cam.
I don't remember anyone using the stock style stamped rockers but it shouldn't be a problem with a light valve spring.
Everyone to date has used roller rockers.
by pmuller9
Thu May 30, 2019 9:37 am
Forum: 144-250 "Small Block" Six Performance
Topic: Do we really need a modern ignition?
Replies: 36
Views: 1053

Re: Do we really need a modern ignition?

Looking at the spark waveform shows a high voltage spike that initially jumps the plug gap. Once the air between the gap is ionized by the initial spark the gap resistance goes very low which drops the voltage to a low value and raises the current significantly. It is the current that ignites the fu...
by pmuller9
Thu May 30, 2019 12:06 am
Forum: 240-300 "Big Block" Six Performance
Topic: Improvements To My 300 Motor
Replies: 23
Views: 784

Re: Improvements To My 300 Motor

Yes, the Chevy rockers will help with performance on the stock engine.
by pmuller9
Wed May 29, 2019 11:06 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Improvements To My 300 Motor
Replies: 23
Views: 784

Re: Improvements To My 300 Motor

As un additional question can anyone tell me what the correct jet size & power valve size is for a Holley 350 cfm two barrel at sea level & 75 degree temp? The power valve should be half the idle the idle vacuum reading or 6.5 if the idle vacuum is greater than 13. You would need to install...
by pmuller9
Wed May 29, 2019 10:57 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Got the motor out....
Replies: 32
Views: 761

Re: Got the motor out....

Max_Effort wrote:Sixty more cubes for cheap... not many engine families give you so much for so little...

I agree.
I just wanted to know why Flareside changed direction.
by pmuller9
Wed May 29, 2019 10:44 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Got the motor out....
Replies: 32
Views: 761

Re: Got the motor out....

The only way I will be putting a 300 assembly in it is if my stuff is trashed, and I have no reason to believe that's the case. Since the 240 crank is OK and just needs to be turned .010", why the need for a 300 rotating assembly. Just get new .040" over Hypereutectic pistons, recondition...
by pmuller9
Wed May 29, 2019 5:04 pm
Forum: 240-300 "Big Block" Six Performance
Topic: C5AE rods
Replies: 54
Views: 1649

Re: C5AE rods

You will be looking at .050" intake durations in the 240s with exhaust durations in the high 230s with a 114 lobe separation angle.
No one will have a profile like that laying around
by pmuller9
Wed May 29, 2019 2:45 pm
Forum: 240-300 "Big Block" Six Performance
Topic: So I have a plan but now im Second guessing myself.
Replies: 40
Views: 733

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

Let's say that the static compression ratio is 8.4 That's with a 76cc chamber and 22cc pistons .025" in the hole. The Dynamic compression ratio is 6.6 with the stock cam 4 degrees retarded. If you change to the 240 head with a 68cc chamber the static compression ratio goes to 9.0 and the dynami...
by pmuller9
Wed May 29, 2019 1:08 pm
Forum: Turbo, Supercharger, and Nitrous
Topic: Turbo US200 Crossflow
Replies: 35
Views: 684

Re: Turbo US200 Crossflow

Which roller rockers fit the head after the stud conversion. BBC?

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