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2018 Contributors:
StarDiero75, curts56, DannyG, B RON CO, wsa111, Captainslow42, falconcritter
Econoline, THE FRENCHTOWN FLYER, 95FordFleetside, turbo6, Max_Effort, WorldChampGramp
cr_bobcat, C.S.Designs, pmuller9, gus91326, rwbrooks50, rocklord, drag-200stang, Big64my79Effie, CNC-Dude, gb500

2019 Contributors:
NJwpod, 1strodeo, mightynorseman, maxtrux, 6d7coupe

Search found 2508 matches

by pmuller9
Sat Jan 19, 2019 9:46 pm
Forum: Turbo, Supercharger, and Nitrous
Topic: Any advice on building a 200ci for a turbo?
Replies: 6
Views: 78

Re: Any advice on building a 200ci for a turbo?

Thanks for letting us know where you stand as far as experience. Doing a turbocharged engine as a first time project is ambitious. There are several 200 six turbo builds on this forum and plenty help available. I think that most will advise a two step approach. Build the engine with the turbo in min...
by pmuller9
Sat Jan 19, 2019 4:13 pm
Forum: Turbo, Supercharger, and Nitrous
Topic: Any advice on building a 200ci for a turbo?
Replies: 6
Views: 78

Re: Any advice on building a 200ci for a turbo?

Do you have a turbocharger that you want to use? Yes it’s a T3/T4 ebay turbo which I know isn’t top of the line but I think it will work for what I want it to do Do you happen to know what the compressor inducer size is? You can measure the inlet size right at the impellor blades to get a close siz...
by pmuller9
Sat Jan 19, 2019 11:51 am
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 362
Views: 29248

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

Thanks for the update! I have a burning question that has been in my mind. With all the efi head issues with cracking, how do you see this being circumvented with the wider valves and therefore reduced space between them. I understand that the EQ head has more material available in it, but... I als...
by pmuller9
Sat Jan 19, 2019 12:08 am
Forum: 240-300 "Big Block" Six Performance
Topic: 1996 4.9l Headers
Replies: 3
Views: 75

Re: 1996 4.9l Headers

The 1996 4.9 EFI has three O2 sensors on the exhaust system.
I'm not sure how you would install headers and be able to keep the O2 sensors so the EFI system would still work properly.
by pmuller9
Fri Jan 18, 2019 11:17 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Street 300 L6 Motor
Replies: 223
Views: 27024

Re: Street 300 L6 Motor

Yes 90 degrees at .250" valve lift.

The rocker ratio shouldn't change the pushrod length because when the rocker is 90* with the valve stem, it is the valve stem height that determines how high the rocker is.
by pmuller9
Fri Jan 18, 2019 10:33 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Distributor
Replies: 3
Views: 113

Re: Distributor

The one nice feature of the HEI setup is it is a one wire connection and it cleans up the look of the engine compartment.
Also it is listed as using all common GM replacement parts.

I'm not seeing any bad reviews for CRT HEI distributors.
by pmuller9
Fri Jan 18, 2019 9:47 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Street 300 L6 Motor
Replies: 223
Views: 27024

Re: Street 300 L6 Motor

I see you have a line drawn on the side of the rocker arm. At .250" VALVE LIFT did the line look like it was 90 degrees with the valve stem? The pattern on the top of the valve tips looks like it is towards the outside which would indicate that the pushrod checker is too long. Maybe you could u...
by pmuller9
Thu Jan 17, 2019 10:52 pm
Forum: Turbo, Supercharger, and Nitrous
Topic: Any advice on building a 200ci for a turbo?
Replies: 6
Views: 78

Re: Any advice on building a 200ci for a turbo?

Do you have a turbocharger that you want to use?
by pmuller9
Thu Jan 17, 2019 9:39 am
Forum: 240-300 "Big Block" Six Performance
Topic: Street 300 L6 Motor
Replies: 223
Views: 27024

Re: Street 300 L6 Motor

Do I take my new push rod length with the lifter off the lobe on the cam back side or on the lobe top full open? Neither. You take the measuement with the valve at half lift. I'm assuming the adjustable pushrod and the 1.75 ratio BBC rockers are the ones shown in the above picture in post #212 Chec...
by pmuller9
Thu Jan 17, 2019 9:15 am
Forum: 240-300 "Big Block" Six Performance
Topic: misaligned block cam journal
Replies: 33
Views: 443

Re: misaligned block cam journal

We mix and match rod and main bearing all the time to get the correct bearing clearance. I run between .002" and .0025" main and rod bearing clearance on a high performance 300 build. I would run .0015" on your engine. If the cam turns freely and is not bent it will not break went run...
by pmuller9
Thu Jan 17, 2019 8:47 am
Forum: 240-300 "Big Block" Six Performance
Topic: 300-6 drawings
Replies: 6
Views: 212

Re: 300-6 drawings

sdiesel wrote:this info needs yo be combined in the cataloging post I started a few days ago.
csn I copy and paste?
anyone mind?


It is already there.
See post #21 and #22
by pmuller9
Wed Jan 16, 2019 10:22 am
Forum: 240-300 "Big Block" Six Performance
Topic: misaligned block cam journal
Replies: 33
Views: 443

Re: misaligned block cam journal

Is the other block already 4.030" bore?
by pmuller9
Wed Jan 16, 2019 12:04 am
Forum: 240-300 "Big Block" Six Performance
Topic: misaligned block cam journal
Replies: 33
Views: 443

Re: misaligned block cam journal

Is the main line for the crank straight?
by pmuller9
Tue Jan 15, 2019 11:06 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Slow going...
Replies: 10
Views: 270

Re: Slow going...

I prefer the 11/32" x .530 Viton metal body seal. Positive stop.
The valve guides will have to be machined to fit the seals.
Most machine shops have the tool to cut the top of the guides.
by pmuller9
Tue Jan 15, 2019 10:58 pm
Forum: 144-250 "Small Block" Six Performance
Topic: 250 Build in 67 Mustang
Replies: 24
Views: 429

Re: 250 Build in 67 Mustang

Would you be willing to get a custom piston form AutoTec and get the exact pin height and dish volume needed for zero deck and correct compression ratio?
by pmuller9
Tue Jan 15, 2019 6:11 pm
Forum: 144-250 "Small Block" Six Performance
Topic: Rev Limiting for FI ?
Replies: 10
Views: 175

Re: Rev Limiting for FI ?

Thanks for the replies, I will probably try out the new Pertronix HEI's with rev limiter on the NA Comet 250. Still unclear whether this type control will hold revs but still deliver full power. (as in staging) The way it works is the following: You stage then push the clutch pedal in which activat...
by pmuller9
Tue Jan 15, 2019 5:55 pm
Forum: 144-250 "Small Block" Six Performance
Topic: Rev Limiting for FI ?
Replies: 10
Views: 175

Re: Rev Limiting for FI ?

The SC'd Maverick 250 will need timing retard referenced to boost. I am getting detonation at the new higher boost levels and will address this as well 'when the snow melts'. Take the time to look at the MSD 6530 instructions and see if you have any questions. https://documents.holley.com/6530.pdf
by pmuller9
Tue Jan 15, 2019 5:35 pm
Forum: 144-250 "Small Block" Six Performance
Topic: Rev Limiting for FI ?
Replies: 10
Views: 175

Re: Rev Limiting for FI ?

The ignitions you are looking at have a set rev limiter that is always on and prevents the engine from overrevving and getting damaged. As 62cometman was pointing out, you are looking for an ignition box that has a "2 step" rev limiter that can be switched on and off. The newest one and le...
by pmuller9
Tue Jan 15, 2019 12:43 pm
Forum: 144-250 "Small Block" Six Performance
Topic: Rev Limiting for FI ?
Replies: 10
Views: 175

Re: Rev Limiting for FI ?

Are you looking at doing something with your Vortech V2 250 six and T5 tranny?
by pmuller9
Tue Jan 15, 2019 10:29 am
Forum: 144-250 "Small Block" Six Performance
Topic: Rev Limiting for FI ?
Replies: 10
Views: 175

Re: Rev Limiting for FI ?

Yes you can control RPM and boost with a Blow-Thru Carburetor set-up In order to get launch boost with a turbocharger in time the engine needs to be at WOT and lots of fuel so the rev limiter in the ignition system is the only thing holding the rpm. Secondly the wastegate along with the boost contro...
by pmuller9
Mon Jan 14, 2019 10:50 pm
Forum: 144-250 "Small Block" Six Performance
Topic: Rev Limiting for FI ?
Replies: 10
Views: 175

Re: Rev Limiting for FI ?

The rev limiter keeps the engine from exceeding a specified rpm by eliminating spark to various cylinders and is meant to be on only for short periods of time.
In order to keep an engine at a certain rpm under load you must kill enough power so it no longer accelerates.

What is it you want to do?
by pmuller9
Mon Jan 14, 2019 10:18 pm
Forum: 144-250 "Small Block" Six Performance
Topic: 250 Build in 67 Mustang
Replies: 24
Views: 429

Re: 250 Build in 67 Mustang

Would it be reasonable to use the stock 5.88" long rods and have AutoTec supply pistons with a 1.63" pin height and around a 15cc dish? No machining to get zero deck and the compression ratio would be around 9:1 depending on head gasket and chamber volume. Have Schneider make a 270H cam wi...
by pmuller9
Mon Jan 14, 2019 1:18 pm
Forum: 240-300 "Big Block" Six Performance
Topic: catalog of conceptual build plans for the b.b.ford sticky
Replies: 25
Views: 938

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

Thank You bubba for making this thread a sticky.
by pmuller9
Mon Jan 14, 2019 12:58 pm
Forum: 240-300 "Big Block" Six Performance
Topic: catalog of conceptual build plans for the b.b.ford sticky
Replies: 25
Views: 938

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

Just a note on "Off the shelf" catalog cams for the 300 six. If you look through the cam listings above in post #6 you will notice a big gap in .050" durations once you get past 220 degrees. Unfortunately performance street cams for the 300 six with a ported head are actually in the 2...
by pmuller9
Mon Jan 14, 2019 12:01 pm
Forum: 240-300 "Big Block" Six Performance
Topic: misaligned block cam journal
Replies: 33
Views: 443

Re: misaligned block cam journal

Sounds like a good plan.
If the cam bore is out of line the main line may be out as well.
by pmuller9
Mon Jan 14, 2019 12:50 am
Forum: 240-300 "Big Block" Six Performance
Topic: misaligned block cam journal
Replies: 33
Views: 443

Re: misaligned block cam journal

If it is touching all the way around then the cam bore is straight. The cam should be easy to turn with the cam gear. Check the cam journals with a micrometer to see if they are correct. If the cam journals are good, If you install the cam from the back of the block does it still wait for the second...
by pmuller9
Mon Jan 14, 2019 12:29 am
Forum: 240-300 "Big Block" Six Performance
Topic: misaligned block cam journal
Replies: 33
Views: 443

Re: misaligned block cam journal

If the late model cam bearings are installed in the early block the cam will not go into the outer bearing by a long shot.
I tried that one. LOL.
It could be the bearing is undersized.
Is the cam touching the bearing surface all the way around or on just one side of the bearing?
by pmuller9
Mon Jan 14, 2019 12:12 am
Forum: 240-300 "Big Block" Six Performance
Topic: misaligned block cam journal
Replies: 33
Views: 443

Re: misaligned block cam journal

There are two different sets of cam bearings.
One set for 1965 to 1985 and another for 1985 midyear to 1996.
I believe the later block and cam bearings have a smaller OD for the center two bearings.
by pmuller9
Sun Jan 13, 2019 11:29 pm
Forum: 240-300 "Big Block" Six Performance
Topic: catalog of conceptual build plans for the b.b.ford sticky
Replies: 25
Views: 938

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

This is the classic long rod 300 build using the 240 connecting rod with the 300 crank. The plan was to produce 325 hp at 5500 rpm. Unfurtunately I moved from WA state before having the opportunity to dyno the engine. The owner reports plenty of torque from 1200 rpm and 18 mpg @ 70 mph highway (2400...
by pmuller9
Sun Jan 13, 2019 10:12 pm
Forum: 240-300 "Big Block" Six Performance
Topic: How to adjust rocker arms with hydraulic lifters?
Replies: 3
Views: 109

Re: How to adjust rocker arms with hydraulic lifters?

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 as you described 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...
by pmuller9
Sun Jan 13, 2019 3:42 pm
Forum: 144-250 "Small Block" Six Performance
Topic: 250 Build in 67 Mustang
Replies: 24
Views: 429

Re: 250 Build in 67 Mustang

Maximizing quench is a high performance, best practice. It doesn't sound like you are doing that, so build to your need. I don't post on the small block side very often but I saw this statement and felt the need. Maximizing quench is very important in a street application where you are limited to p...
by pmuller9
Sat Jan 12, 2019 10:43 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Street 300 L6 Motor
Replies: 223
Views: 27024

Re: Street 300 L6 Motor

The standard BBF roller rockers have the same 1.65" length as the BBC.
When you get the Elgin rockers measure the length before installation just to be sure they are correct.

Just know that there are aftermarket heads that require different length rockers.
by pmuller9
Sat Jan 12, 2019 7:25 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Street 300 L6 Motor
Replies: 223
Views: 27024

Re: Street 300 L6 Motor

old28racer

How much did you mill off the top of the rocker stud bosses?
The rockers sit nice and low on the studs.
by pmuller9
Sat Jan 12, 2019 7:20 pm
Forum: 240-300 "Big Block" Six Performance
Topic: catalog of conceptual build plans for the b.b.ford sticky
Replies: 25
Views: 938

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

Engine Dimensions for installation.
Thanks to Max_Effort
Image
by pmuller9
Sat Jan 12, 2019 2:23 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 300-6 drawings
Replies: 6
Views: 212

Re: 300-6 drawings

The 300 engine is 14" from the oil pan rail on the bottom of the block to the valve cover rail on the top of the head. The valve cover is 3" high not counting the breather cap. There are 2 oil pans, rear sump and middle sump. The rear sump is 9 inches deep, 9.5" if you want to include...
by pmuller9
Sat Jan 12, 2019 12:54 pm
Forum: 240-300 "Big Block" Six Performance
Topic: compression
Replies: 29
Views: 809

Re: compression

Be sure to magnaflux any used EFI head. They tend to have cracks in the combustion chamber. The problem with the Melling cam is when they went with a longer duration exhuast lobe they got stuck with the extra lift which is not needed. Other than that if you are using roller rocker then it is not a p...
by pmuller9
Thu Jan 10, 2019 11:05 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Cam Selection for Weber DCOE carbs
Replies: 50
Views: 4785

Re: Cam Selection for Weber DCOE carbs

The main reason for running the side drafts is for looks. Not sure that they will outperform a properly tuned 4 barrel setup. I personally like the side draft look on an inline engine but the cost is high as you pointed out. I looked at them at the PRI show but have not used them. The one advantage ...
by pmuller9
Thu Jan 10, 2019 12:09 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Next step for more HP?
Replies: 22
Views: 455

Re: Next step for more HP?

dr johnny fever wrote: Cam, Head P&P.
Considering I'm looking to get off the line quick and maybe spin the tires a little and I never go over 65-70ish in this truck, what cam and pistons would you guys suggest?

First
What octane pump gas do you want to use?
by pmuller9
Wed Jan 09, 2019 10:41 pm
Forum: 240-300 "Big Block" Six Performance
Topic: catalog of conceptual build plans for the b.b.ford sticky
Replies: 25
Views: 938

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

I am currently searching for a list of options for screw in rocker studs for a carb head. I have seen mention of many different ones, some requiring milling the stud bosses and some not, but it's hard to sort through and pinpoint what works. I'd like to find a simple combination that works with jus...
by pmuller9
Wed Jan 09, 2019 9:31 am
Forum: 240-300 "Big Block" Six Performance
Topic: 300 head stud questions concerns
Replies: 5
Views: 243

Re: 300 head stud questions concerns

The pushrod length for the 1984 and earlier heads is 10.140" so just measure what you have. The later pedestal mount rocker heads have a .060" shorter valve but I don't know if the pushrods where shorter. You are correct that the pushrods running through a slotted hole need to be hardened ...
by pmuller9
Tue Jan 08, 2019 10:32 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Next step for more HP?
Replies: 22
Views: 455

Re: Next step for more HP?

Very good looking truck.
Nice engine compartment cleanup.
by pmuller9
Tue Jan 08, 2019 10:03 pm
Forum: 240-300 "Big Block" Six Performance
Topic: catalog of conceptual build plans for the b.b.ford sticky
Replies: 25
Views: 938

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

Please make this a sticky so we don't have to keep looking for it.
by pmuller9
Tue Jan 08, 2019 9:57 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Next step for more HP?
Replies: 22
Views: 455

Re: Next step for more HP?

Max_Effort wrote: Even the worn, stock, broken piston skirt 300 in my 83 F150 4x4 is snappy in first and second gear.

That's Good, I like it. LOL
I think the pistons were designed to Self Lighten with Break-A-Way skirts if the engine was run at a performamce level.
by pmuller9
Tue Jan 08, 2019 1:15 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Next step for more HP?
Replies: 22
Views: 455

Re: Next step for more HP?

I'd keep the stock pistons for now if they're okay. Upgrade when needed. I spin my 85 bottom to 5k all the time. How would anyone know if the pistons are OK? This piston was taken out of a good running 1983 300 six. https://www.dropbox.com/s/mql2j53tpnsrzhu/Broken%20300%20piston%202.jpg?raw=1
by pmuller9
Tue Jan 08, 2019 12:15 am
Forum: 240-300 "Big Block" Six Performance
Topic: Next step for more HP?
Replies: 22
Views: 455

Re: Next step for more HP?

You would need head modifications for more airflow and a cam.
The problem is the stock cast pistons break leaving parts of the piston skirt in the oil pan.
The project now includes reworking the bottom end.

Is that something you are willing to do?
by pmuller9
Sat Jan 05, 2019 11:10 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Reduce Displacement
Replies: 18
Views: 422

Re: Reduce Displacement

If you are looking for engine efficiency I have had better results by increasing the rod length to stroke ratio. The piston side loading is decreased which reduces piston to wall friction. There is also a reduction in "G" forces at TDC A longer rod in the 300 six also allowed me to reduce ...
by pmuller9
Sat Jan 05, 2019 6:51 pm
Forum: Turbo, Supercharger, and Nitrous
Topic: turbo 200 build
Replies: 133
Views: 15402

Re: turbo 200 build

The turbo was sized to make power from 2000 to 5500 rpm with a 6000 rpm limit.
With the correct cam it would be blast to drive on the street.
by pmuller9
Fri Jan 04, 2019 9:30 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Reduce Displacement
Replies: 18
Views: 422

Re: Reduce Displacement

Rzwanzig
Is your main goal to maximize fuel mileage?
Are you looking to use a roller cam and roller rockers?
by pmuller9
Fri Jan 04, 2019 1:26 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Reduce Displacement
Replies: 18
Views: 422

Re: Reduce Displacement

Yes The OD of the sleeve can be 4.100" and have plenty of thickness at the top since the top of the bore can be 3.900" and still not be inside the combustion chamber. You can also use a shouldered sleeve so there is a small step at the top to hold the sleeve in place. A 240 crank with a 3....

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