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Search found 511 matches

by guhfluh
Sat Aug 01, 2020 4:48 pm
Forum: 240-300 "Big Block" Six Performance
Topic: My build and soon to come Dyno
Replies: 17
Views: 362

Re: My build and soon to come Dyno

Nice build. I see a problem with your hot air intake choice though, more so because it's a van. It's good for fuel economy, but not for peak HP/TQ and fighting detonation. If you can get it air from outside the bay somehow, you'll be better off in that aspect. I'm interested in seeing your results. :)
by guhfluh
Sat Aug 01, 2020 4:43 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Beginner 300 moderate rebuild
Replies: 30
Views: 1534

Re: Beginner 300 moderate rebuild

Next phase while we wait for camshaft and then the machine shop... we are moving onto replacing the exhaust system I have read what I could on this forum and FTE about mufflers and cats... we've ordered the Dynomax super turbo muffler with 2.5 off centered in and 2.5 centered outlet. Its aluminized...
by guhfluh
Thu Jul 23, 2020 1:37 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Adjustable cam gear
Replies: 45
Views: 1380

Re: Adjustable cam gear

If you unshroud the chamber you can pull as much as 6 cc out of the chamber volume. When you convert to studs you will also need pushrod guide plates. You will also need hardened shaft pushrods designed for guild plates. I would still retard the cam to increase the margin on the tune-up. It is a 67...
by guhfluh
Thu Jul 23, 2020 12:26 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Adjustable cam gear
Replies: 45
Views: 1380

Re: Adjustable cam gear

Guhfluh, what will the rest of the build specs be for the short block and head on this combo? :nod: Well, it's off topic but, nothing out of the ordinary for now because I lost income. It looks like it will just be a stock 95 bottom end, a Felpro 1024 gasket and my 240 home ported head. I need to g...
by guhfluh
Thu Jul 23, 2020 10:21 am
Forum: 240-300 "Big Block" Six Performance
Topic: Adjustable cam gear
Replies: 45
Views: 1380

Re: Adjustable cam gear

I understand and agree. I am stuck with my Comp 268H for now, which supposedly has a problem with high DCR and detonation at low-midrange RPM. I also have a turbo that is pretty well matched to that RPM as well - a Holset HE351CW - the combination of the two should compound the issue as well as stre...
by guhfluh
Wed Jul 22, 2020 9:51 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Adjustable cam gear
Replies: 45
Views: 1380

Re: Adjustable cam gear

...I have the adjustable Cloyes set and was actually contemplating retarding it the 8* from where I'm at now advanced, just to see how much it'll affect the power curve... I can tell you right now it will rotate the torque curve around the torque peak, with the peak torque amount and rpm changing v...
by guhfluh
Tue Jul 21, 2020 9:04 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Adjustable cam gear
Replies: 45
Views: 1380

Re: Adjustable cam gear

Cloyes gearsets had an advance keyway and a retard keyway. From conversations I see here it seems everyone wants to advance their timing - nobody has said they want to further retard their timing. Ergo, it would seem to me the most logical way to re-engineer a gearset would be to put in three keywa...
by guhfluh
Mon Jul 13, 2020 9:51 am
Forum: 240-300 "Big Block" Six Performance
Topic: MPG – Torque – Cruise speed and gear ratio hypothetical?
Replies: 24
Views: 1671

Re: MPG – Torque – Cruise speed and gear ratio hypothetical?

For what it's worth, I have similar gearing and drag to your van. I have 3.73 gears in the Dana 60, I believe 245/70R16 tires and the same gear ratios in the T170 as the RUG. I believe pmuller's comment is spot on with needing to change the transmission. Higher gears will reduce highway mileage and ...
by guhfluh
Fri Jul 03, 2020 12:55 pm
Forum: 240-300 "Big Block" Six Performance
Topic: The BC backcountry basher
Replies: 45
Views: 1394

Re: The BC backcountry basher

For speed density v8s, the cam LSA must be 114 or higher. Not sure on the six. Cams for the 300 are usually rated for rpm range in a 240. Take 1000 rpms off each number and that will get you the rpm range in a 300. For instance, my cam has an advertised rpm range of 2400-6000. It kicks in right off...
by guhfluh
Fri Jul 03, 2020 12:05 pm
Forum: 240-300 "Big Block" Six Performance
Topic: The BC backcountry basher
Replies: 45
Views: 1394

Re: The BC backcountry basher

4 hole injectors don't improve injector cooling, they just have a better spray pattern. Newer style injectors should also require less cooling than the original style. Your goal of 200hp and 300ftlb might be attainable with the factory EFI intake manifold, but I doubt you'll get a power band to 5k a...
by guhfluh
Fri Jul 03, 2020 11:03 am
Forum: 240-300 "Big Block" Six Performance
Topic: The BC backcountry basher
Replies: 45
Views: 1394

Re: The BC backcountry basher

Harbottle wrote:
sdiesel wrote:Is this rig obd1?
Or the sefi fuel injection?


I honestly dont know.

They're both OBD1 really. The later uses a MAF sensor in the air intake and i believe an o2 sensor in each exhaust manifold as the easiest way to tell.
by guhfluh
Mon Jun 29, 2020 11:14 am
Forum: 240-300 "Big Block" Six Performance
Topic: Another idle contemplation -the 300 six "marinized" for watersport
Replies: 53
Views: 1716

Re: Another idle contemplation -the 300 six "marinized" for watersport

On the marine engines I can remember working on, everything had the exhaust cooled last in the system. The engine coolers were the first to receive flow. On a freshwater only system, I'm not sure, as I've only seen a couple maybe. I see no difference than in a car with an oversized radiator and ther...
by guhfluh
Mon Jun 29, 2020 10:10 am
Forum: 240-300 "Big Block" Six Performance
Topic: Another idle contemplation -the 300 six "marinized" for watersport
Replies: 53
Views: 1716

Re: Another idle contemplation -the 300 six "marinized" for watersport

So in a marine application short of full on racing, the incoming coolant temp should be as close to operating temp as possible? Like 195 or so? In a pleasure craft / tow boat that will see a ton of idling and low pre plane time,a closed system with heat exchanger or some valving to allowed cool wat...
by guhfluh
Sun Jun 28, 2020 9:51 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Another idle contemplation -the 300 six "marinized" for watersport
Replies: 53
Views: 1716

Re: Another idle contemplation -the 300 six "marinized" for watersport

Well, a valid question now arises, was there ever a marine application for the Ford 300 six The six can produce ample torque in the lower register, and is very durable in so doing. It shaves a little over 100 pounds over the eight in an already heavy boat and shifts the weight slightly forward and ...
by guhfluh
Sun Jun 28, 2020 2:50 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Another idle contemplation -the 300 six "marinized" for watersport
Replies: 53
Views: 1716

Re: Another idle contemplation -the 300 six "marinized" for watersport

I see exhaust manifold heat being a problem at the head/intake area. If you could find or build a water cooled manifold, it'd be great.

Many, many marine water cooled turbo exhaust housings out there for Cummins and others.

A prop pitch change for the RPM band wanted may be warranted.
by guhfluh
Fri Jun 26, 2020 6:44 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 240 to 300 upgrades
Replies: 15
Views: 833

Re: 240 to 300 upgrades

Thank you for the feedback! I thought I was going nuts.... (am I crazy maybe the guy that builds motors for a living is right ?) It's good to know that I need to insist on the 10:1 max. Glad you like the truck. It's been my first full frame off. The use is near seal level for street use. I'm not go...
by guhfluh
Sat Jun 20, 2020 8:58 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Anyone offering porting and head machine work?
Replies: 4
Views: 292

Re: Anyone offering porting and head machine work?

The only place in the country that has recently done 240/300 heads that I know of is C-Tech Performance out of Michigan. They did a 300 head for me and another forum member. Talk to Arny https://c-techperformance.com/ Thank you. I believe they may be who I had talked to a few years back from your r...
by guhfluh
Sat Jun 20, 2020 1:37 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Anyone offering porting and head machine work?
Replies: 4
Views: 292

Anyone offering porting and head machine work?

I have one more shop to try locally, but all of the automotive machine shops around here seem to have dried up and the ones that are still around don't do their own work, they send it off to the one place everyone uses. I have talked to that one place that does everyone's work, but they are not real...
by guhfluh
Sun Jun 14, 2020 3:27 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Another piston and connecting rod combination
Replies: 30
Views: 4055

Re: Another piston and connecting rod combination

I'd be trying it if it was cheap, but it's not. It comes out to about the same as the BBC rods and custom piston route.
by guhfluh
Wed Jun 03, 2020 8:39 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 240 - First Build
Replies: 9
Views: 444

Re: 240 - First Build

Unless they've updated, they didn't offer a Pertronix 2 or 3 for the 300. I love mine, I just make sure to turn the key back to Accessory instead of Run if I want to leave it on for the radio or something. I got tired of having the spare points in my glove box and took them out a long time ago. The ...
by guhfluh
Mon May 18, 2020 7:02 pm
Forum: 240-300 "Big Block" Six Performance
Topic: AussieSpeed valve cover and Side Plate
Replies: 2
Views: 260

Re: AussieSpeed valve cover and Side Plate

They make note that the side cover only fits early model 240/300 engines and does not fit the later EFI engines. Do you notice anything with the side cover that would prevent it from fitting a later block? I'm not sure what measurements would be different in side covers or blocks to make a differenc...
by guhfluh
Thu May 07, 2020 4:55 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Started my build
Replies: 163
Views: 8780

Re: Started my build

Yeah the switch plug is usually where it started and would melt wiring under the dash. Thanks for the heads up. I'll be replacing the wires under the dash, if I find anything I'll be sure to let everyone know. Honestly I was very surprised at the volume of black electrical tape that was used on thi...
by guhfluh
Sat Apr 25, 2020 2:31 pm
Forum: 240-300 "Big Block" Six Performance
Topic: knock sensor(s) location options core plug?
Replies: 12
Views: 1314

Re: knock sensor(s) location options core plug?

a shout out to guhfluh who suggested these. det cans might help you cross check for knock, but be aware that you have to be able to instantly shut down spark advance when knock is present. , https://www.youtube.com/watch?v=DPgVKgzc6WE https://www.youtube.com/watch?time_continue=34&v=DPgVKgzc6WE...
by guhfluh
Mon Apr 20, 2020 9:01 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Started my build
Replies: 163
Views: 8780

Re: Started my build

Try to find your truck's build date. If the bearing dates are after the build date, it has to be repair after the fact. The bearing dates should precede the truck by just a couple months or very close. Marti may have all the info needed.
by guhfluh
Mon Apr 20, 2020 7:33 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Started my build
Replies: 163
Views: 8780

Re: Started my build

And to the fact that a 1970 truck would not and could not have bearings with a later date code/part number.

This truck's bearings match the build date of the truck.
by guhfluh
Mon Apr 20, 2020 1:38 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 5 PSI, now severe blowby
Replies: 66
Views: 3756

Re: 5 PSI, now severe blowby

Given your unfortunate history with this project I think I'd start with high octane race gas (100+ RON ) and go down from there as you go up the tuning curve process. The highest octane that is easily accessible around here is 93. Can off the shelf octane boosters from the parts store be used to br...
by guhfluh
Wed Apr 15, 2020 8:45 am
Forum: 240-300 "Big Block" Six Performance
Topic: Started my build
Replies: 163
Views: 8780

Re: Started my build

The last bearings you state are .025" undersized? Hmm.
by guhfluh
Wed Apr 15, 2020 8:40 am
Forum: 240-300 "Big Block" Six Performance
Topic: 5 PSI, now severe blowby
Replies: 66
Views: 3756

Re: 5 PSI, now severe blowby

I'd toss some stock bore hypers in it with a dingle hone and try again before spending a bunch of money on better parts, but that's just me. :beer: Me and my buddies have been debating if we just hone it with new pistons and rings or actually pull the motor and build it correctly, that way I can be...
by guhfluh
Tue Apr 14, 2020 5:56 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Started my build
Replies: 163
Views: 8780

Re: Started my build

That is pretty interesting. When I was working at the dealers, it was more recently, and I did see some bearings that were .001" or maybe even .002", but hadn't seen .010".
by guhfluh
Tue Apr 14, 2020 9:45 am
Forum: 240-300 "Big Block" Six Performance
Topic: Started my build
Replies: 163
Views: 8780

Re: Started my build

Yes, the stampings show when they were made and the size. One is 12/77 and regular size, the other is 1/78 and stamped 010 US, meaning .010" undersized on the crank journal. It makes sense that the bearings are original since the truck is a 78, I just don't know.
by guhfluh
Tue Apr 14, 2020 6:40 am
Forum: 240-300 "Big Block" Six Performance
Topic: Started my build
Replies: 163
Views: 8780

Re: Started my build

I find it interesting that your truck is a 78, the bearings are dated as 12/77 and 1/78, yet one shows being .010 undersized already. I wonder what the history is. Did Ford install anything undersized when new?
by guhfluh
Sun Apr 12, 2020 2:03 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 5 PSI, now severe blowby
Replies: 66
Views: 3756

Re: 5 PSI, now severe blowby

I'm confused. They show 7.8 with a 69-79 carb head and he has an EFI head. My apologies. The Silv-O-Lite is listed as having a 32 cc dish. https://uempistons.com/series-2244-silv-o-lite-ford-300-4-9-3158h.html If you do the calculations with a 69cc head, 32 cc piston dish, .037" in the hole .0...
by guhfluh
Sun Apr 12, 2020 1:49 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Started my build
Replies: 163
Views: 8780

Re: Started my build

... When using the lever style on the bench, I have a hole drilled in the bench top that I thread a head bolt or similar through to bolt the head down. It helps to put something in the chamber under the valve so the valve does not move .3 before the retainer separates from the stem. Before compress...
by guhfluh
Sun Apr 12, 2020 1:12 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Started my build
Replies: 163
Views: 8780

Re: Started my build

I used a cheap one from Harbor Freight or similar auto parts store. It's easier than one that uses a lever if you have the head on the bench and no way to clamp it down and keep it from moving. https://www.harborfreight.com/universal-overhead-valve-spring-compressor-60335.html When using the lever s...
by guhfluh
Sun Apr 12, 2020 1:03 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 5 PSI, now severe blowby
Replies: 66
Views: 3756

Re: 5 PSI, now severe blowby

Why not 3158H then? The 3158H and the Speed Pro H554CP have a 40 cc dish and would drop the compression ratio to 7.6 without decking the block. If the engine tune is set for that low of a compression it may not work for the final engine assembly which will have a higher DCR. I'm confused. They show...
by guhfluh
Sun Apr 12, 2020 12:38 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 5 PSI, now severe blowby
Replies: 66
Views: 3756

Re: 5 PSI, now severe blowby

Why not 3158H then?
by guhfluh
Sat Apr 11, 2020 3:51 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Aussie speed intake manifold and valve cover.
Replies: 37
Views: 3945

Re: Aussie speed intake manifold and valve cover.

Oh, I forgot to comment on the PCV/breather. Using the side cover, I can see it promoting oil drain back from the head because combustion gasses aren't fighting to get up through the same holes at the same time the oil is draining down. But, I also wonder if it promotes any water condensation in the...
by guhfluh
Sat Apr 11, 2020 3:04 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Aussie speed intake manifold and valve cover.
Replies: 37
Views: 3945

Re: Aussie speed intake manifold and valve cover.

It does look like you'll need to weld on some bosses to mount the rail securely with for the Aussiespeed. I mentioned in another thread I wondered why they didn't cast them in. Clifford does even though they don't market it as an EFI intake. I still like the looks of it either way.
by guhfluh
Sat Apr 11, 2020 2:48 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 5 PSI, now severe blowby
Replies: 66
Views: 3756

Re: 5 PSI, now severe blowby

I'd toss some stock bore hypers in it with a dingle hone and try again before spending a bunch of money on better parts, but that's just me. :beer:
by guhfluh
Wed Apr 08, 2020 8:37 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 1990 f250 towing capacity
Replies: 31
Views: 1922

Re: 1990 f250 towing capacity

I think the ZF6 is a much better trans than the ZF5 in strength, longevity and gear splits. Stock for stock they shift better as well. I'd even rather a M5OD for its gear ratio splits over a ZF5 unless I was towing heavy from a stop or backing up. I actually have a M5OD I was going to put in, but I ...
by guhfluh
Wed Apr 08, 2020 11:53 am
Forum: 240-300 "Big Block" Six Performance
Topic: 1990 f250 towing capacity
Replies: 31
Views: 1922

Re: 1990 f250 towing capacity

If you really want a modular bell ZF6 behind a 300, call Performance Automatic. They already have a SBF to modular adapter they sell for a 6R80. From what I've seen, the bolt and dowel pattern is easy to overcome, but the starter location and size changed enough to need some work. If adapting a pump...
by guhfluh
Tue Apr 07, 2020 2:37 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 5 PSI, now severe blowby
Replies: 66
Views: 3756

Re: 5 PSI, now severe blowby

Here is the MechRick post. https://fordsix.com/viewtopic.php?p=624079#p624079 When running a Megasquirt on my '96 pickup it seemed to like ~32-34 degrees. Thanks. And to note that no mention of fuel octane used. I run only 93 in my truck. With my setup anything less will diesel on shut down. I also...
by guhfluh
Tue Apr 07, 2020 2:03 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 5 PSI, now severe blowby
Replies: 66
Views: 3756

Re: 5 PSI, now severe blowby

Head gasket replacement. Re check the obvious. I doubt youve cracked the atom yet. While a blown headgasket is the best case scenario, I have installed a FelPro 1024 headgasket with head studs, so I don't think 5lbs of boost would blow out the gasket. You say u have two filters and no suction hose ...
by guhfluh
Mon Apr 06, 2020 1:12 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 5 PSI, now severe blowby
Replies: 66
Views: 3756

Re: 5 PSI, now severe blowby

What was the ignition timing at 130 kpa (5 psi)? What was the air/fuel ratio at 5 psi? Ditto. You mentioned wanting to still run on 87 octane in the other thread. Not the best choice for a turbo application that's detonation prone. The EFI head doesn't like timing, should be much less under boost. ...
by guhfluh
Sat Apr 04, 2020 6:08 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 240/300 Copper Head gasket
Replies: 15
Views: 1353

Re: 240/300 Copper Head gasket

Forced Induction. Works with either block or head O-Ring. On this platform, which would be the better way to go, block or head ring? Without a receiver groove I guess, or with one if needed. Most on other platforms seem to like the ring in block to keep from having to redo the head groove when deck...
by guhfluh
Fri Apr 03, 2020 3:42 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Turbo 240
Replies: 21
Views: 1527

Re: Turbo 240

$1699 or so is what I'm seeing cheapest. $2-2500 I believe is possible with billet wheel and other options, but that might not be right for that size. You have to call them or email them for a quote, so I haven't bothered.
by guhfluh
Fri Apr 03, 2020 3:10 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Turbo 240
Replies: 21
Views: 1527

Re: Turbo 240

Food for thought - Comp makes decent oil less turbos. A 5858 comes to mind in this scenario. You just need to remember to grease them every 3000 miles using their grease gun. They have a nice size range of turbos. How much does a 5858 cost? A lot. :lol: I'm not sure, I haven't searched in a while a...
by guhfluh
Fri Apr 03, 2020 2:47 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Turbo 240
Replies: 21
Views: 1527

Re: Turbo 240

Paul in the circumstances of a remote turbo would not the long tube twin scroll header be the best option? Assume vehicle s room for turbo directly at collector, or just after the cat converter Yes. Use the EFI exhaust manifolds with separate tubes from each manifold to each of the scroll inlets on...
by guhfluh
Wed Apr 01, 2020 2:16 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 240/300 Copper Head gasket
Replies: 15
Views: 1353

Re: 240/300 Copper Head gasket

Its easier to cut a groove in the block. Use piano wire cut to fit the groove plus about .001 - .002" interference. I like to place the butted ends away from the adjacent siamesed portion of the bores - the most likely leakage path. The O-ring wire can be removed if needed by a welder tacking ...
by guhfluh
Wed Apr 01, 2020 1:03 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 240/300 Copper Head gasket
Replies: 15
Views: 1353

Re: 240/300 Copper Head gasket

Forced Induction. Works with either block or head O-Ring. On this platform, which would be the better way to go, block or head ring? Without a receiver groove I guess, or with one if needed. Most on other platforms seem to like the ring in block to keep from having to redo the head groove when deck...

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