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Search found 3101 matches

by pmuller9
Mon Jun 24, 2019 3:27 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 240 valve size?
Replies: 22
Views: 367

Re: 240 valve size?

Yep I still remember the days of just street and race referenced cams and having to go to the car dealer to get a lot of performance parts. Not to add any confusion, but I think Erson list advertised at .004" tappet rise. That makes their advertised look just a little larger than some others. I...
by pmuller9
Mon Jun 24, 2019 11:57 am
Forum: 240-300 "Big Block" Six Performance
Topic: 240 valve size?
Replies: 22
Views: 367

Re: 240 valve size?

I would be happy to. If you wouldn't mind, please explain the reasoning on the measurement at 0.006". Also, I was looking at the Erson cams, and saw the 292 duration they have, still at 0.478" lift. Would this cam be too much for me? The SAE standard for measuring advertised duration is a...
by pmuller9
Mon Jun 24, 2019 10:49 am
Forum: 240-300 "Big Block" Six Performance
Topic: 240 valve size?
Replies: 22
Views: 367

Re: 240 valve size?

Yes I will be building the entire engine. Shop will be fitting pistons to rods. I do plan on degreeing the cam. When you degree the cam would you mind recording both the .006" and .050" durations of the intake and exhaust cam lobes. I would appreciate it. I like to sample what each cam co...
by pmuller9
Sun Jun 23, 2019 5:39 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 240 valve size?
Replies: 22
Views: 367

Re: 240 valve size?

The Erson cam will give you a little better off idle response and it has the same overlap as the Crower cam.
Also the Erson cam has 280 degrees advertised duration which will allow a higher compression ratio and still be able to run 87 octane gas.

Will you be installing the cam?
by pmuller9
Sun Jun 23, 2019 10:42 am
Forum: 240-300 "Big Block" Six Performance
Topic: 2100s and E85
Replies: 3
Views: 111

Re: 2100s and E85

I don't expect that you will have any problems with 93 octane gas. It would also help if you used a cold air intake system. If you change a gas engine to E85 the fuel mileage goes down. It you build an engine specifically for E85 with 11:1 compression you gain back some of the fuel mileage but the e...
by pmuller9
Sat Jun 22, 2019 10:18 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 300 4.9L timing plate question
Replies: 2
Views: 90

Re: 300 4.9L timing plate question

The 10 degree notch plates are found on the 4.9 EFI engines with the 1996 being the possible exception.
The few I've seen go out to 36 degrees BTDC.
by pmuller9
Sat Jun 22, 2019 1:39 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 240 valve size?
Replies: 22
Views: 367

Re: 240 valve size?

The Erson cam looks good especially with the lower lift and long advertised duration.
Thanks Max
by pmuller9
Sat Jun 22, 2019 12:18 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 2100s and E85
Replies: 3
Views: 111

Re: 2100s and E85

E85 can increase power because it cools and condenses the air/fuel mixture. It also increase power by allowing compression ratios beyond what pump gas will tolerate but that requires a build specific to E85 and is no longer pump gas compatible. It can also be used to cure a pump gas borderline engin...
by pmuller9
Sat Jun 22, 2019 12:03 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Rotor Phasing
Replies: 12
Views: 234

Re: Rotor Phasing

wow, but is it necessary with modern electronic timing? like TFI or Edis 6?. and is this a "the last one percent" of power to be wrung from an internal combuston engine. makes perfect sense. No, it is a different problem. Sometimes when you are using an aftermarket EFI system that require...
by pmuller9
Sat Jun 22, 2019 11:55 am
Forum: 240-300 "Big Block" Six Performance
Topic: 240 valve size?
Replies: 22
Views: 367

Re: 240 valve size?

I'm going to recommend the Crower 266HDP (19213) .456”/.461” 210/213 266/274 112deg cam for the following reasons. I don't like running stamped or cast rockers over .500" lift. The clearance between the slot in the rocker and the rocker stud needs to be checked at full lift to make sure the stu...
by pmuller9
Sat Jun 22, 2019 11:18 am
Forum: 240-300 "Big Block" Six Performance
Topic: Rotor Phasing
Replies: 12
Views: 234

Re: Rotor Phasing

The pickup plate is relative to the electrodes in the cap and the rotor is relative to the trigger/reluctor wheel. Moving the pickup plate changes the relationship between the electrodes and the pickup. MSD has an adjustable rotor that changes the relationship between the rotor and the trigger whee...
by pmuller9
Sat Jun 22, 2019 12:23 am
Forum: 240-300 "Big Block" Six Performance
Topic: Rotor Phasing
Replies: 12
Views: 234

Re: Rotor Phasing

WTH, is rotor phasing? with a crank trigger, and knock sensor the ecu will calibrate. why do I not understand the need to set the rotor at a different clocking than the trigger wheel. if that is indeed what is meant by phasing You want the rotor to point at the center of the contact in the distribu...
by pmuller9
Fri Jun 21, 2019 10:24 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 240 valve size?
Replies: 22
Views: 367

Re: 240 valve size?

I apologize. Yes, the 7 remaining press in studs are being pulled and screw ins installed. No problem That being the case you can stay with the 1.75 ratio Chevy rockers. I'm assuming you have them already? Before suggesting a cam it would be good to review Offy "C" intake and Headers. Whi...
by pmuller9
Fri Jun 21, 2019 9:13 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 240 valve size?
Replies: 22
Views: 367

Re: 240 valve size?

Knowing now what the bottom end will be like, do you still suggest a cam in the 0.050" 210-214 degree range? Is there any concern using the Chevy rockers with these cams? Would I need to get a stiffer valve spring if running these rockers? Yes, still suggest a cam in the .050" 210-214 ran...
by pmuller9
Fri Jun 21, 2019 9:56 am
Forum: 144-250 "Small Block" Six Performance
Topic: Do we really need a modern ignition?
Replies: 39
Views: 1185

Re: Do we really need a modern ignition?

Don't forget, if 15,000 volts ignites the mixture, 50 bazillion volts is not needed. This is a not the total picture and leads to misconceptions. Looking at the spark waveform on a scope shows a high voltage spike that initially jumps the plug gap. Once the air between the gap is ionized by the ini...
by pmuller9
Fri Jun 21, 2019 9:29 am
Forum: 240-300 "Big Block" Six Performance
Topic: 94’ 300 i6 upgrades for better horsepower
Replies: 5
Views: 149

Re: 94’ 300 i6 upgrades for better horsepower

If you are keeping the stock EFI system and you have already upgraded the exhaust system then the only upgrade left is a camshaft and replace the fiber timing gear set with a metal set.
by pmuller9
Thu Jun 20, 2019 12:30 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Advice for a Newbie - 1984 Ford F350 upgrades
Replies: 13
Views: 274

Re: Advice for a Newbie - 1984 Ford F350 upgrades

What ignition system did you get?
by pmuller9
Thu Jun 20, 2019 11:51 am
Forum: 240-300 "Big Block" Six Performance
Topic: 300 I6 EFI performance upgrades
Replies: 273
Views: 43834

Re: 300 I6 EFI performance upgrades

Please post pictures of the 3/8" holes or slots for the pushrods. You will need one Comp 7903-1 checking pushrod to set up the valvetrain. Most checkers are 5/16" You will also need (or borrow) a 12" caliper to measure the checker pushrod. If not you could bring the checker to your ma...
by pmuller9
Wed Jun 19, 2019 11:57 pm
Forum: 144-250 "Small Block" Six Performance
Topic: Valve train clatter
Replies: 37
Views: 745

Re: Valve train clatter

charliecurrie wrote:I did it like you stated. The plunger appeared to depress after i came to zero lash.

Then it looks like the lifter is collapsed.
There should be a spring under the plunger that keeps it up against the retaining clip.
The lifters have a problem.
by pmuller9
Wed Jun 19, 2019 5:35 pm
Forum: 144-250 "Small Block" Six Performance
Topic: Valve train clatter
Replies: 37
Views: 745

Re: Valve train clatter

During the first couple of times I tried to adjust the rockers, as I would tighten them to zero lash and stop, a couple of the lifters would sink enough for the rod to become loose enough to twist. This may be the problem. That is not zero lash! Zero lash is when the pushrod barely begins to get ti...
by pmuller9
Wed Jun 19, 2019 4:45 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 300 I6 EFI performance upgrades
Replies: 273
Views: 43834

Re: 300 I6 EFI performance upgrades

Those flow numbers will work great for the RPM range you will be operating at.

Do you have valve springs and retainers?
Do you have roller rockers?
by pmuller9
Wed Jun 19, 2019 4:03 pm
Forum: 240-300 "Big Block" Six Performance
Topic: EFI 4.9
Replies: 6
Views: 187

Re: EFI 4.9

Has it always gotten 12 mpg or did it once get much better and has gone down over a period of time?
by pmuller9
Wed Jun 19, 2019 9:19 am
Forum: 144-250 "Small Block" Six Performance
Topic: Valve train clatter
Replies: 37
Views: 745

Re: Valve train clatter

I don't know why.
I'm hoping you find the reason when you take one out for inspection.
by pmuller9
Wed Jun 19, 2019 8:47 am
Forum: 144-250 "Small Block" Six Performance
Topic: Valve train clatter
Replies: 37
Views: 745

Re: Valve train clatter

It looks like the lifters are not bleeding down after adjustment.
They are acting like solid lifters.

Take one out and see if you can push the plunger down away form the retaining clip.
If so measure how much travel you have.
Most anti pump lifters only have about .100" worth of travel.
by pmuller9
Tue Jun 18, 2019 9:46 am
Forum: 240-300 "Big Block" Six Performance
Topic: industrial 300 blocks
Replies: 3
Views: 174

Re: industrial 300 blocks

The blocks may not be stronger but there is a possibility to find a forged steel crank and some of the heads could have hard exhaust valve seat inserts.
by pmuller9
Mon Jun 17, 2019 10:55 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Valves
Replies: 8
Views: 201

Re: Valves

You can mill the head .020" which will remove almost 3cc and leave another .005" for future cleanup.
by pmuller9
Mon Jun 17, 2019 10:26 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Valves
Replies: 8
Views: 201

Re: Valves

Yes you did send me piston pics. They had 3 valve reliefs. Thanks for reminding me. You should have around a 9:1 compression ratio and be able to use 87 octane pump gas using the 140H cam. Even though the Harland Sharps are advertised at a 1.6 ratio you may find that the actual ratio is higher. I wo...
by pmuller9
Mon Jun 17, 2019 9:58 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Valves
Replies: 8
Views: 201

Re: Valves

Not for what you are doing.

What valves did you buy?
What did you end up with for pistons and head?
by pmuller9
Mon Jun 17, 2019 9:41 pm
Forum: 240-300 "Big Block" Six Performance
Topic: So I have a plan but now im Second guessing myself.
Replies: 43
Views: 936

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

So I am clear I'm not making changes to the short block, I was only doing what if type thinking. I was confused earlier thinking the shortblock was going to be rebuilt. Too many project to keep track of. The short block should be able to stay as is. When you take the head off it would be important ...
by pmuller9
Mon Jun 17, 2019 12:11 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Advice for a Newbie - 1984 Ford F350 upgrades
Replies: 13
Views: 274

Re: Advice for a Newbie - 1984 Ford F350 upgrades

If your engine has the feedback carburetor along with the TFI ignition system, ignition system will not work properly without the original carb.
You may need to replace the ignition system also.

Is there an O2 sensor in the exhaust system?
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: 43
Views: 936

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: 28
Views: 1244

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: 28
Views: 1244

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: 28
Views: 1244

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: 43
Views: 936

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: 562

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: 562

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: 268

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: 562

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: 27
Views: 891

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: 27
Views: 891

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: 22
Views: 367

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: 197

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: 3818

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: 27
Views: 891

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: 27
Views: 891

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: 288

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: 37
Views: 745

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: 27
Views: 891

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: 27
Views: 891

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...

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