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Search found 4278 matches

by pmuller9
Sun Jan 26, 2014 10:45 pm
Forum: 240-300 "Big Block" Six Performance
Topic: CFM and Volumetric Efficiency of a 300...
Replies: 37
Views: 8735

Re: CFM and Volumetric Efficiency of a 300...

clintonvillian wrote:My calculator says i need 9 psi to move 409 cfm to reach 300hp.


Yes, that's 409 cfm going into the intake of the S/C but the pressure ratio at 9 psi is 1.6.
The actual flow going out the S/C and into the engine is 409/1.6 or 255 cfm.
by pmuller9
Sun Jan 26, 2014 10:33 pm
Forum: 240-300 "Big Block" Six Performance
Topic: CFM and Volumetric Efficiency of a 300...
Replies: 37
Views: 8735

Re: CFM and Volumetric Efficiency of a 300...

clintonvillian wrote:Is that hand ported or on a cnc, efi head or carb???


CNC Ported 1986 Carb Head
by pmuller9
Sun Jan 26, 2014 9:31 pm
Forum: 240-300 "Big Block" Six Performance
Topic: CFM and Volumetric Efficiency of a 300...
Replies: 37
Views: 8735

Re: CFM and Volumetric Efficiency of a 300...

Here is a stock 240 head and a CNC ported 300 carb head 2.02/1.60 valves


Image
by pmuller9
Sun Jan 26, 2014 4:35 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 240 rod/piston combo for supercharged 300
Replies: 28
Views: 4515

Re: 240 rod/piston combo for supercharged 300

Crank pulleys? Where can you get crank pulleys for a 300 six? I have yet to find one.........I have a metco 9.1" pulley that I was going to have a custom hub made for. It would bolt to the balancer using the inner hub to center it. If you have a source on the crank pulleys that will fit our ba...
by pmuller9
Sun Jan 26, 2014 6:25 am
Forum: 240-300 "Big Block" Six Performance
Topic: 240 rod/piston combo for supercharged 300
Replies: 28
Views: 4515

Re: 240 rod/piston combo for supercharged 300

The m1 is from a lightning. I am worried that if i design this thing off of the balancer pulley and it is to low i am back to square one and redesigning the pulley system. Smallest i can go is 2.7 at the s/c and thats risking slippage. Thats only 2.1:1. I can go up in pulley size on the s/c just ca...
by pmuller9
Sat Jan 25, 2014 10:39 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 240 rod/piston combo for supercharged 300
Replies: 28
Views: 4515

Re: 240 rod/piston combo for supercharged 300

BTW 2:1 off of the harmonic balancer would greatly simplify my life! So if 2:1 will get me to 10psi......I am all for it! 2:1 should get you close to 10 lbs of boost. The way it works for an unkown engine and S/C combination, you use the S/C specs to get close to a drive ratio, then you try it and ...
by pmuller9
Sat Jan 25, 2014 5:21 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 240 rod/piston combo for supercharged 300
Replies: 28
Views: 4515

Re: 240 rod/piston combo for supercharged 300

Well, I can possibly see that centering the piston mass over the pin bore could lead to less rocking in the bores. I'm not convinced that the gas pressures will have an effect though. Those guys must hate production pistons that have a pin offset so as to intentionally put more load on the thrust s...
by pmuller9
Sat Jan 25, 2014 2:55 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 240 rod/piston combo for supercharged 300
Replies: 28
Views: 4515

Re: 240 rod/piston combo for supercharged 300

Here is something that I completely missed. The goal is to run 10 lbs of boost and to run the S/C at a 3:1 drive ratio. Looking at the flow chart for a M112 and comparing the flow of a 300 cid engine with a VE of 80%, it shows 20 lbs of boost if you drive the S/C at a 3:1 drive ratio. That is not ta...
by pmuller9
Sat Jan 25, 2014 1:44 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 240 rod/piston combo for supercharged 300
Replies: 28
Views: 4515

Re: 240 rod/piston combo for supercharged 300

I am just running a 10 row 1.5" heat exchanger that will be mounted directly below the S/C. FWIW The ford 5.4 motors that run the supercharger use pistons that are only .200 thick, ring at .220 down with ring thicknesses of 1.5,1.5,3mm respectively. They also have a -18cc dome. So I can't see ...
by pmuller9
Sat Jan 25, 2014 12:03 am
Forum: 240-300 "Big Block" Six Performance
Topic: 240 rod/piston combo for supercharged 300
Replies: 28
Views: 4515

Re: 240 rod/piston combo for supercharged 300

I've got a m112 that I am going to go through and have port and polished. Custom cam grind from comp. 700 -4500 rpms I want my torque curve to start flattening out at 1500ish. The m112 will be rationed at 3:1 which puts it at 13500 rpms (most efficient rpm) at my wot. You've certainly done your hom...
by pmuller9
Fri Jan 24, 2014 9:52 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 240 rod/piston combo for supercharged 300
Replies: 28
Views: 4515

Re: 240 rod/piston combo for supercharged 300

[Spherical dish pistons center the down force over the center of the piston pin. Less forces trying to rotate the piston into the cylinder wall. I don't get that. The dish could be shaped like Mickey Mouse ears and the net force applied to the top of the piston will be the same as a flat top. No? W...
by pmuller9
Fri Jan 24, 2014 6:53 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 240 rod/piston combo for supercharged 300
Replies: 28
Views: 4515

Re: 240 rod/piston combo for supercharged 300

You are correct 10666. Guys run these all the time on mustangs with boost. Techs at probe assured me they would be fine for 5-10 psi. How much did your set cost you??? They will run OK but as you said the compression is too high and you really need a set with enough volume in the dish so you can ha...
by pmuller9
Fri Jan 24, 2014 4:14 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 240 rod/piston combo for supercharged 300
Replies: 28
Views: 4515

Re: 240 rod/piston combo for supercharged 300

OK lets see if we can help you. It looks as though you got the Probe 10666 piston which is an 2618 alloy piston? Don't use a piston that has the valve reliefs cut in the top!! I just ordered a custom set of pistons to use with the 6.8" 240 rods from RaceTec. Mine are for a 9.75 compression N/A ...
by pmuller9
Fri Jan 24, 2014 3:01 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 240 rod/piston combo for supercharged 300
Replies: 28
Views: 4515

Re: 240 rod/piston combo for supercharged 300

76cc on the chamber volume Any idea how far in the hole the stock 300 are??? The only way I could get the compression ratio to match 8.8 was with the following numbers: Stroke: 3.98 Bore: 4.0 Gasket: .040" Deck Height: 0 Piston Volume: 20cc Chamber: 76cc That puts it at 8.86. If the pistons ar...
by pmuller9
Fri Jan 24, 2014 2:44 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 240 rod/piston combo for supercharged 300
Replies: 28
Views: 4515

Re: 240 rod/piston combo for supercharged 300

What is the chamber volume in the heads that you have?
what compression ratio are you looking for?
by pmuller9
Tue Jan 21, 2014 10:29 pm
Forum: Turbo, Supercharger, and Nitrous
Topic: a new "blow-through" build..
Replies: 46
Views: 13436

Re: a new "blow-through" build..

Is this engine for the Bronco? actually this is up for grabs at this point But for now, pistons and cam choice. May I ask, is that an expensive "neighborhood" where those pistons you like are made I put the order in for my pistons this past Monday and I'm waiting for their engineering dep...
by pmuller9
Mon Jan 20, 2014 2:30 pm
Forum: Turbo, Supercharger, and Nitrous
Topic: a new "blow-through" build..
Replies: 46
Views: 13436

Re: a new "blow-through" build..

Bubba made a point that the 1V center section of the stock manifold is a bottle neck and would be a restriction unless it was modified. I would have to agree. Aftermarket aluminum intakes have larger runners for upper rpm performance and are not ideal for this project. Having said that, the manifold...
by pmuller9
Mon Jan 20, 2014 2:56 am
Forum: Fuel Injection - Mega Squirt
Topic: Holley hp vs megasquirt for 300 turbo
Replies: 1
Views: 2303

Re: Holley hp vs megasquirt for 300 turbo

I'm building a turbo 300 for my 78 ford half ton. I've got a carbed engine and a 96 Obdii mass air engine. What's my best option for engine managment? Megasquirt? Moates quarterhorse? Holley hp? You will need a system that will work with a 2 bar MAP sensor. The MS3 is the least expensive and has al...
by pmuller9
Sun Jan 19, 2014 4:35 am
Forum: Turbo, Supercharger, and Nitrous
Topic: a new "blow-through" build..
Replies: 46
Views: 13436

Re: a new "blow-through" build..

BTW, here's another question for ya... Have you seen a gauge that can measure and display degrees of advance BTDC live in real time INSIDE THE CAB? You'd think someone would build that into a tach readout.. . I haven't use it but here is one https://dl.dropboxusercontent.com/u/39382077/dsg1401broch...
by pmuller9
Sat Jan 18, 2014 11:43 pm
Forum: Turbo, Supercharger, and Nitrous
Topic: a new "blow-through" build..
Replies: 46
Views: 13436

Re: a new "blow-through" build..

I actually like the the lower pressure approach of the "draw thru" of "can this work".....makes it all even simpler..and my other controls work as well..less fabbing.. no inter-cooler..and I am familiar with draw thru..well..need to get an engine built first.. There are reasons ...
by pmuller9
Fri Jan 17, 2014 10:57 pm
Forum: Turbo, Supercharger, and Nitrous
Topic: a new "blow-through" build..
Replies: 46
Views: 13436

Re: a new "blow-through" build..

This device is actually a full range from idle-cutoff, or full lean to full rich (at least as advertized). It has a lever on the SIDE of the block that will hook directly to an aircraft style McFarland or other mfg 's vernier cable. http://www.mcfarlane-aviation.com/Products/?PartNumber=MC600-72 ht...
by pmuller9
Fri Jan 17, 2014 8:18 pm
Forum: Turbo, Supercharger, and Nitrous
Topic: a new "blow-through" build..
Replies: 46
Views: 13436

Re: a new "blow-through" build..

good input..I notice that that posting talks about a different approach as the one I'm considering but good to look at none the less. The Percy adjust a-jet .. I have the hope that the Device I'm looking at is a complete adjust form idle-cutoff to full rich with a lever..not an adjustment screw..we...
by pmuller9
Fri Jan 17, 2014 7:04 pm
Forum: Turbo, Supercharger, and Nitrous
Topic: a new "blow-through" build..
Replies: 46
Views: 13436

Re: a new "blow-through" build..

I was thinking about the possibility of using mechanical fuel injection where you can manually control the main and secondary bypass and have full control of the fuel. No carb and the problem of boost referenced fuel pressure goes away. Just a thought. Something to think about..and read up on of co...
by pmuller9
Fri Jan 17, 2014 3:15 pm
Forum: Turbo, Supercharger, and Nitrous
Topic: a new "blow-through" build..
Replies: 46
Views: 13436

Re: a new "blow-through" build..

I was thinking about the possibility of using mechanical fuel injection where you can manually control the main and secondary bypass and have full control of the fuel. No carb and the problem of boost referenced fuel pressure goes away.
Just a thought.
by pmuller9
Fri Jan 17, 2014 2:56 pm
Forum: Turbo, Supercharger, and Nitrous
Topic: a new "blow-through" build..
Replies: 46
Views: 13436

Re: a new "blow-through" build..

Another question has kept me awake some..that only mat be answered by reading, asking others, or testing: "At what lowest RPM will this engine safely produce the most torque?' (all this while staying cool enuf for a practical DD) Is this engine for the Bronco? The only time the engine would be...
by pmuller9
Fri Jan 17, 2014 2:20 pm
Forum: Turbo, Supercharger, and Nitrous
Topic: a new "blow-through" build..
Replies: 46
Views: 13436

Re: a new "blow-through" build..

:shock: :wow: that is awesome! my latest thought is to grab the small cummins/holset HY35 that most of the late 90's 6bt 12v engines had. folks have said its too small, hmmm..I'm not so sure about one of those myself..From what I've read, I would think it would be too big actually. It's capable of ...
by pmuller9
Fri Jan 17, 2014 2:23 am
Forum: Turbo, Supercharger, and Nitrous
Topic: a new "blow-through" build..
Replies: 46
Views: 13436

Re: a new "blow-through" build..

In planning this out, I understand I will need to watch CR making sure is is in the lowers 8's..how much will this effect any use NA?, Only time and use will tell possibly. Either advancing the stock cam or using the suggested new cam bumps the Dynamic CR up. You would need to drop the static CR do...
by pmuller9
Thu Jan 16, 2014 2:34 pm
Forum: 240-300 "Big Block" Six Performance
Topic: about an EGT probe
Replies: 20
Views: 4505

Re: about an EGT probe

About the cam, I suppose a cam choice would be good. One thing I don't like about these motors is the lack of a roller cam option easily. The break-in worry, and fuss over the special attention etc. But a new cam wouldn't hurt for optimum output I suppose. recommendations? If the lift is restricted...
by pmuller9
Thu Jan 16, 2014 1:33 pm
Forum: Turbo, Supercharger, and Nitrous
Topic: a new "blow-through" build..
Replies: 46
Views: 13436

Re: a new "blow-through" build..

Cam and compression considerations: This is long and detailed because of it's importance. As you already know, the stock cam is 4 degrees retarded and would best serve a turbo application in an advanced position. If you advance the cam from 4* retarded to straight up, the Dynamic compression ratio i...
by pmuller9
Thu Jan 16, 2014 11:09 am
Forum: 240-300 "Big Block" Six Performance
Topic: about an EGT probe
Replies: 20
Views: 4505

Re: about an EGT probe

No problem with manual boost adjustment on the fly. We used an electronic boost controller for racing but it was simply regulating the air pressure to the second port of the waste gate. If you use a 2 port waste gate you can use an adjustable air regulator to control boost. You select the spring in ...
by pmuller9
Wed Jan 15, 2014 6:01 pm
Forum: Turbo, Supercharger, and Nitrous
Topic: a new "blow-through" build..
Replies: 46
Views: 13436

Re: a new "blow-through" build..

If you haven't already you might want to read up on my other EGT probe thread. I gave some back story to my interest and history there. I genuinely appreciate the input.. I'll be following your progress on your 240 approach as well. Best wishes as you "play" at what drives you each day......
by pmuller9
Tue Jan 14, 2014 11:40 pm
Forum: Turbo, Supercharger, and Nitrous
Topic: a new "blow-through" build..
Replies: 46
Views: 13436

Re: a new "blow-through" build..

I actually have been wanting to buy a new casting while available from Engine-Quest anyway that supposedly has a few thicker areas in the casting. I'm not sure if they are really any better, or even as good as OEM, but having tried one that I'm now using on my signature Bronco, I like it. I like th...
by pmuller9
Tue Jan 14, 2014 1:26 am
Forum: Turbo, Supercharger, and Nitrous
Topic: a new "blow-through" build..
Replies: 46
Views: 13436

Re: a new "blow-through" build..

Don't do .060" over bore. For turbo use you want as much cylinder wall thickness as possible. Displacement is not as important as block integrity. Sonic check the block for cylinder wall thickness and core shift. If you have more than one block to choose from then check them all and use the bes...
by pmuller9
Sun Jan 12, 2014 12:01 am
Forum: 240-300 "Big Block" Six Performance
Topic: about an EGT probe
Replies: 20
Views: 4505

Re: about an EGT probe

Thank you for sure for input. I'm just gathering parts now for another long block. I have come to appreciate this 300 for torque and lower rpm output actually. I also want to monitor the use of a turbo in the long run to maximize the potential of the motor while helping to hide some of what I perce...
by pmuller9
Sat Jan 11, 2014 11:36 pm
Forum: 240-300 "Big Block" Six Performance
Topic: CC VARIANCE OF CHAMBERS
Replies: 48
Views: 7717

Re: CC VARIANCE OF CHAMBERS

StrangeRanger wrote:The specs I quoted are straight out of the Ford Shop Manual for the EFI head which has the same volume as but a very different shape than the 240 head.

300 carb heads are much larger


Thanks for the info.

My head is a carb head
by pmuller9
Sat Jan 11, 2014 11:24 pm
Forum: 240-300 "Big Block" Six Performance
Topic: about an EGT probe
Replies: 20
Views: 4505

Re: about an EGT probe

Good info for sure..May I ask, where do you place your probes?..or is it a trade secret?. I really am interested in a baseline of what may be an acceptable max reading for a given location for the overall good health of say a HYPER piston install? at 9.3 :1 or so on 93 non-ethanol and at this point...
by pmuller9
Sat Jan 11, 2014 8:04 pm
Forum: 240-300 "Big Block" Six Performance
Topic: about an EGT probe
Replies: 20
Views: 4505

Re: about an EGT probe

We use Data logging with EGTs on all of our race engines so I can tell you what we see. The recorded EGT is more of a function of engine load and temperature changes are not instantaneous. You will get an EGT level for a certain load and as the load changes the EGT will change and eventually reach t...
by pmuller9
Sat Jan 11, 2014 1:06 pm
Forum: 240-300 "Big Block" Six Performance
Topic: CC VARIANCE OF CHAMBERS
Replies: 48
Views: 7717

Re: CC VARIANCE OF CHAMBERS

Hello, Greaser. Thanks for the info and the reply. The 77cc chamber is from another member. It is the polished chamber in the photo. I do not know the cc volume of my chambers. I will cc the chambers before and after I remove the ridges. Another member, StrangeRanger, wrote that the stock chamber i...
by pmuller9
Thu Jan 09, 2014 12:18 pm
Forum: 240-300 "Big Block" Six Performance
Topic: CC VARIANCE OF CHAMBERS
Replies: 48
Views: 7717

Re: CC VARIANCE OF CHAMBERS

Given the replies from FTF and CNC-Dude it looks like you will need to make a template that registers off the 2 alignment dowels. Start with a 29" by 6" sheet of thin cardboard or very thin aluminum. Lay it on the block deck and cut out the holes for the alignment dowels by tapping lightly...
by pmuller9
Thu Jan 09, 2014 12:47 am
Forum: 240-300 "Big Block" Six Performance
Topic: CC VARIANCE OF CHAMBERS
Replies: 48
Views: 7717

Re: CC VARIANCE OF CHAMBERS

pmuller, thanks for the feedback. I was feeling very intimidated with the project, but now, understanding how you did the same type of chambers, I know I can do it. I'll use the gasket to scribe the chamber walls, since the engine is built and I can't reach through the cylinders to scribe. I'm tryi...
by pmuller9
Tue Jan 07, 2014 2:01 am
Forum: 240-300 "Big Block" Six Performance
Topic: CC VARIANCE OF CHAMBERS
Replies: 48
Views: 7717

Re: CC VARIANCE OF CHAMBERS

Sorry for the confusion, guys. The photos are of two heads. Mine is on top. It was shaved .020. The photo on the bottom is or a member's head. To further explain my intentions, I plan to replicate the chamber in the lower photo on my head, grinding out any evidence of the fast burn ridges. That wil...
by pmuller9
Tue Jan 07, 2014 12:12 am
Forum: 240-300 "Big Block" Six Performance
Topic: CC VARIANCE OF CHAMBERS
Replies: 48
Views: 7717

Re: CC VARIANCE OF CHAMBERS

Sorry for the confusion, guys. The photos are of two heads. Mine is on top. It was shaved .020. The photo on the bottom is or a member's head. To further explain my intentions, I plan to replicate the chamber in the lower photo on my head, grinding out any evidence of the fast burn ridges. That wil...
by pmuller9
Wed Jan 01, 2014 5:14 pm
Forum: 240-300 "Big Block" Six Performance
Topic: HD 300 from f600
Replies: 25
Views: 5322

Re: HD 300 from f600

The static compression ratio is determined more by camshaft selection. The 300+ hp build I'm doing uses a cam with 288* advertised duration and 232* .050" lobe lift duration. The intake valve closes later than with a stock cam allowing static compression ratios closer to 10:1 while maintaining ...
by pmuller9
Tue Dec 17, 2013 1:49 am
Forum: 240-300 "Big Block" Six Performance
Topic: CC VARIANCE OF CHAMBERS
Replies: 48
Views: 7717

Re: CC VARIANCE OF CHAMBERS

80broncoman explained the spark plug ground strap. I am assuming you mean that machine shops flatten or surface the area around where the head bolt sits to help get a proper torque? Am I close? I use ARP studs if it makes a difference. Yes. Spot facing gives a flat surface for the head bolt or ARP s...
by pmuller9
Mon Dec 16, 2013 2:15 pm
Forum: 240-300 "Big Block" Six Performance
Topic: CC VARIANCE OF CHAMBERS
Replies: 48
Views: 7717

Re: CC VARIANCE OF CHAMBERS

Thanks for the photos. That is a really nice head you have. I will use one of the photos as a guide while porting. Hopefully my bowls won't need work, since I paid to have them cleaned up back when. I'll be concentrating on the chambers and cleaning the runners with 110 grit cones. It is interestin...
by pmuller9
Mon Dec 16, 2013 1:53 am
Forum: 240-300 "Big Block" Six Performance
Topic: CC VARIANCE OF CHAMBERS
Replies: 48
Views: 7717

Re: CC VARIANCE OF CHAMBERS

I'll be working on it at a buddy's shop. A pro porter will give tips. I should be good. I just need to lower the c.r. into the 9.0--9.5:1 range. My main concern is the 'wall' drop from the head deck to the surface where the valves sit. In your photo it looks as though I could set a square on a valv...
by pmuller9
Sun Dec 15, 2013 8:01 pm
Forum: 240-300 "Big Block" Six Performance
Topic: CC VARIANCE OF CHAMBERS
Replies: 48
Views: 7717

Re: CC VARIANCE OF CHAMBERS

StrangeRanger & pmuller: Thanks guys. Given the amount of material to be removed, do you think it is possible with this head, with a pro to show the way, or would I be better to start with a standard head, with the non quick burn chambers? Starting off with a standard head is easier because you...
by pmuller9
Sun Dec 15, 2013 6:40 pm
Forum: 240-300 "Big Block" Six Performance
Topic: CC VARIANCE OF CHAMBERS
Replies: 48
Views: 7717

Re: CC VARIANCE OF CHAMBERS

The specification on stock heads is 65.4-68.4 cc. You certainly want to have no wider a variance than that 3cc range. Personally I'd shoot for a total span of about 1cc. Measure the stock chambers and start with the largest one. Polish it and then work the others to match. Bolt the head to the bloc...
by pmuller9
Sat Nov 16, 2013 9:26 pm
Forum: 240-300 "Big Block" Six Performance
Topic: big six max rpm
Replies: 82
Views: 13839

Re: big six max rpm

Mushrooms? Canned or Fresh? Mushroom lifters were used in racing when the rules did not permit roller lifters. Most of the mushroom lifters had a .960" base which allowed a lot more lift per degree than smaller straight body lifter. .842" lifter is just over .007" lift per degree. .9...

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