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Search found 820 matches

by MechRick
Thu Jun 14, 2018 3:02 pm
Forum: 240-300 "Big Block" Six Performance
Topic: VINTAGE CHAMP CAR REPLICA BUILD
Replies: 51
Views: 6530

Re: VINTAGE CHAMP CAR REPLICA BUILD

Love that hand crank valve lapper!
by MechRick
Fri Jun 08, 2018 4:20 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Carbon Sludge in Intake Port @ Fuel Injector
Replies: 30
Views: 3275

Re: Carbon Sludge in Intake Port @ Fuel Injector

So, there is not a grey plug in my spout connector (it's quite dirty in there). And, no, I have never attempted to adjust the ignition timing. I am fairly sure the spout connector plug was missing prior to the bucking issue starting. I seem to remember more than one of those connectors underhood. T...
by MechRick
Thu Jun 07, 2018 9:35 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Carbon Sludge in Intake Port @ Fuel Injector
Replies: 30
Views: 3275

Re: Carbon Sludge in Intake Port @ Fuel Injector

We used to call all of the intake fed solvents "engine in a can" because feeding the stuff in to a running engine too quickly could hydrolock the thing and break parts. Caution is warranted. I read ignition coil or ignition module could cause my symptoms; I checked both and both tested OK ...
by MechRick
Thu Jun 07, 2018 3:46 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Carbon Sludge in Intake Port @ Fuel Injector
Replies: 30
Views: 3275

Re: Carbon Sludge in Intake Port @ Fuel Injector

I *was* a bit vague... I've been using tantalum capacitors in projects since the mid '90's. All the Megasquirts I've assembled came with them. They are extremely rugged, as long as they are protected from voltage spikes and surges. I believe tantalums are available in the uF and voltage ranges used ...
by MechRick
Thu Jun 07, 2018 10:05 am
Forum: 240-300 "Big Block" Six Performance
Topic: Carbon Sludge in Intake Port @ Fuel Injector
Replies: 30
Views: 3275

Re: Carbon Sludge in Intake Port @ Fuel Injector

Years ago Ford supplied to their dealers a chemical that was mixed with gasoline then forced into the injector rail under pressure. Stuff worked great for restoring injector flow. They also had an aerosol that we sprayed into the intake, let soak in the engine for 30 minutes and then ran the engine ...
by MechRick
Sun Jan 14, 2018 10:29 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 1994 300 rocker arm swap
Replies: 27
Views: 2615

Re: 1994 300 rocker arm swap

I always run Super in my vehicles in an attempt to minimize carbon and keep injectors clean. so that wouldnt bother me. Not really a function of octane, more about the additives. Google 'top tier gasoline'. Also realize using higher octane than recommended can cause driveability problems. As a gene...
by MechRick
Mon Dec 18, 2017 1:45 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Finding the right scale.
Replies: 17
Views: 1810

Re: Finding the right scale.

Think of a V8 as four 90 degree V twins. V twins must have counterweights to balance out. Inline engines don't need counterweights. Fours have a bit of secondary vibration (caused by speed differences between the top half and bottom half of the piston stroke) but inline sixes balance out perfectly. ...
by MechRick
Thu Dec 14, 2017 1:37 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Low Cost Rocker Arms
Replies: 11
Views: 1386

Re: Low Cost Rocker Arms

I get it now, starting with a stud head. So, drilling out the fulcrum allows use of the positive stop fulcrum on a stud with poly locks and guideplates? I tried to open the link, had no luck. At some point, I'm probably going to bolt a set of Cleveland pedestal rockers on mine, the delay is the mach...
by MechRick
Wed Dec 13, 2017 2:51 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Low Cost Rocker Arms
Replies: 11
Views: 1386

Re: Low Cost Rocker Arms

get a set of poly lock adjusters to adjust the valves If they are bolt-down rockers, they can't be left loose. Studs/poly locks won't work. I've been through this trying to figure out an easy/cheap way to run adjustable bolt-down rockers for a solid lifter cam in a 351 Cleveland. There are adjustab...
by MechRick
Mon Dec 11, 2017 8:07 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Fitech 2 Barrel
Replies: 2
Views: 876

Re: Fitech 2 Barrel

Pretty cool.

The price isn't that bad, considering the cost of a good Holley.

I would like to see universal throttle bodies with staged plates along the lines of the Holley Commander 4 bbl units.
by MechRick
Sun Dec 10, 2017 12:35 pm
Forum: Fuel Injection - Mega Squirt
Topic: Fuel pressure under boost
Replies: 1
Views: 795

Re: Fuel pressure under boost

Are you talking about Escort TBI?
by MechRick
Sun Dec 10, 2017 10:14 am
Forum: 240-300 "Big Block" Six Performance
Topic: Hp/ tq on a 300 6
Replies: 10
Views: 2204

Re: Hp/ tq on a 300 6

Those numbers illustrate my point exactly. I'm sure that head has been reworked, yet the peak HP number fails to reach 5252 RPM. Torque and HP will always be equal at 5252 RPM, which means the torque was falling off big time at the 5100 RPM peak HP number. Cams with higher duration and overlap numbe...
by MechRick
Sun Dec 10, 2017 9:37 am
Forum: 240-300 "Big Block" Six Performance
Topic: Hp/ tq on a 300 6
Replies: 10
Views: 2204

Re: Hp/ tq on a 300 6

The big six has gained it's legendary status from it's wide, flat torque curve starting early in the powerband. Stock, it's making around 260 ft lbs from 1500 to 3000 RPM. This is diesel territory. An engine that makes similar numbers is Cummins new 2.8L repower option: https://cumminsengines.com/re...
by MechRick
Thu Dec 07, 2017 1:23 pm
Forum: 240-300 "Big Block" Six Performance
Topic: max mpg from 300 in a lightweight vehicle.
Replies: 32
Views: 4133

Re: max mpg from 300 in a lightweight vehicle.

That's a great price for an AA, especially if it's complete with wheels...

AA's are cool!

https://barnfinds.com/reader-find-1929- ... -aa-truck/
by MechRick
Wed Dec 06, 2017 1:36 pm
Forum: 240-300 "Big Block" Six Performance
Topic: max mpg from 300 in a lightweight vehicle.
Replies: 32
Views: 4133

Re: max mpg from 300 in a lightweight vehicle.

I wonder which would make more power and or economy. High compression e85 or low compression 87.... E85 would make more HP, economy would go down a bit. Megasquirt offers a dual table mode so you can run both (dual fuel). Consider a TT instead.... http://topclassiccarsforsale.com/ford/175016-model-...
by MechRick
Mon Nov 20, 2017 1:27 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Help what rod bearings to i get.
Replies: 19
Views: 2581

Re: Help what rod bearings to i get.

If the bearings and crank journals look ok on the rebuilder, you could throw some plastigauge in there to determine clearances. But, having said that, it's important to check the big end bore of the connecting rods. The bearings are held in place by the crush between the rod cap and rod (NOT the loc...
by MechRick
Sun Nov 19, 2017 6:05 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Help what rod bearings to i get.
Replies: 19
Views: 2581

Re: Help what rod bearings to i get.

if i am measuring for .010 of difference wouldnt something accurate up to .001" close enough? Close enough to determine the undersize of the crank journal (if they are undersize), but not accurate enough to determine the actual bearing clearance. Once you start measuring crank journals it will...
by MechRick
Sat Nov 18, 2017 6:41 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Help what rod bearings to i get.
Replies: 19
Views: 2581

Re: Help what rod bearings to i get.

If it spun a bearing, there will be damage to the crank journal, and there *may* be damage to the rod. Get it apart and look for bluing on the big end. <edit> I should read slower. You are starting off with a running core engine. The crank journals need to be measured with vernier calipers (accurate...
by MechRick
Wed Nov 15, 2017 1:51 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 300 I6 EFI performance upgrades
Replies: 277
Views: 48960

Re: 300 I6 EFI performance upgrades

What did you use to shield the starter positive and negative cables? I found some heat shield tube that slides over the cables, but the shielding physically touches the header. Is this an issue? I routed the cables down under the right engine mount bracket. I did put them in split loom, and inspect...
by MechRick
Fri Nov 10, 2017 3:59 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Efi to carb conversion
Replies: 2
Views: 744

Re: Efi to carb conversion

Kunst55 wrote:He told me he used to be a mechanic


What does he do now, flip burgers?

Sorry, I just get worked up over people who lie just to make a buck.

He's wrong. The carb has a mixture control solenoid, and it will run rich without the computer controlling it.
by MechRick
Thu Nov 09, 2017 11:47 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 300 I6 EFI performance upgrades
Replies: 277
Views: 48960

Re: 300 I6 EFI performance upgrades

I made a heat shield out of an old license plate after I cooked a starter. It's held on with a big hose clamp.
by MechRick
Thu Nov 09, 2017 9:29 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 300 I6 EFI performance upgrades
Replies: 277
Views: 48960

Re: 300 I6 EFI performance upgrades

You have to pull the header to install even a pm starter. One of the reasons I took the header off.
by MechRick
Thu Nov 09, 2017 9:27 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 300 I6 EFI performance upgrades
Replies: 277
Views: 48960

Re: 300 I6 EFI performance upgrades

Just use the heat insulator that clips to the bottom of the lower intake. I've done that with a header with no issues.
by MechRick
Sun Oct 29, 2017 10:11 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Wideband O2 and lean burn possibilities?
Replies: 5
Views: 1147

Re: Wideband O2 and lean burn possibilities?

I was thinking it might be possible to run lean for a short time (seconds?) and then flip back to rich (for a shorter time) instead of the near constant cycling back and forth that we have now. I was thinking the larger cat might be able to store more CO for brief periods and then clean it up durin...
by MechRick
Sun Oct 29, 2017 4:36 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Despite all, it can tow!
Replies: 13
Views: 3234

Re: Despite all, it can tow!

Always wondered about the drastic differences in factory ratings with lower gears. Then I towed my 5,500 TT with my 3.55 equipped half-ton. Getting that load moving was a struggle. And that was with 3.55's and 31x10.50 tires. Taller gears increase the upward force on the pinion (pinion gear is walki...
by MechRick
Fri Oct 27, 2017 2:54 pm
Forum: 240-300 "Big Block" Six Performance
Topic: bullet proof
Replies: 7
Views: 1418

Re: bullet proof

I've got a 4.9-powered half ton (4680 lbs) and a 7.5-powered 3/4 ton (5760 lbs). The half ton is fine up to 10,000 lbs combined weight as long as what you are towing has reasonable aerodynamics. You won't like the power to weight ratio pulling an enclosed trailer at that weight with the 4.9L. The bi...
by MechRick
Fri Oct 06, 2017 2:02 pm
Forum: 240-300 "Big Block" Six Performance
Topic: '96 300 F150 Options for a bit more power, fuel efficiency, getting rid of missfire.
Replies: 6
Views: 1260

Re: '96 300 F150 Options for a bit more power, fuel efficiency, getting rid of missfire.

http://www.misterfixit.com/dyncompr.htm That's a fairly good explanation. Running compression is useful because the check is being done close to the RPM the symptom is felt. Sometimes a valve will seal when you slow things down. It's good for checking springs and for excessive carbon on valve stems ...
by MechRick
Mon Oct 02, 2017 9:33 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 300 I6 EFI performance upgrades
Replies: 277
Views: 48960

Re: 300 I6 EFI performance upgrades

If you have a propane bottle, crank it open over each intake runner and see if it smoothes out.
by MechRick
Sun Oct 01, 2017 9:25 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 300 I6 EFI performance upgrades
Replies: 277
Views: 48960

Re: 300 I6 EFI performance upgrades

88F15088 wrote:At idle the MAP reading is around 95-96 KPA. If I am correct, I think it is supposed to be around 60-70KPA


It should be idling in the 30's or 40's.
by MechRick
Sun Oct 01, 2017 8:43 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 300 I6 EFI performance upgrades
Replies: 277
Views: 48960

Re: 300 I6 EFI performance upgrades

If you want to control an idle valve with a MS1, the idle transistor will have to be swapped to one that sinks more current. I don't think it's necessary with 2 and 3. Because of the higher than normal fuel pressure these trucks run, fudge the injector flow rate in basic settings. Example: 14 pph in...
by MechRick
Sun Oct 01, 2017 8:31 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 300 I6 EFI performance upgrades
Replies: 277
Views: 48960

Re: 300 I6 EFI performance upgrades

Are you using stock injectors? If so, you will have to change the number of squirts in the firmware. I ran mine with 24 pph injectors and it ran fine. Switching back to the stock injectors forced me to change settings. Did you run Ford ECT and IAT sensors with the easytherm modifications? I found Me...
by MechRick
Fri Sep 29, 2017 9:03 pm
Forum: 240-300 "Big Block" Six Performance
Topic: '96 300 F150 Options for a bit more power, fuel efficiency, getting rid of missfire.
Replies: 6
Views: 1260

Re: '96 300 F150 Options for a bit more power, fuel efficiency, getting rid of missfire.

Usually when I hear of a low rpm miss that goes away at higher rpm, I suspect a valve seal issue. They don't always show with a cranking compression test. I've had better luck finding it with a running compression test. It could be a vacuum leak at an intake runner. Check to see if the gasket is spl...
by MechRick
Wed Sep 27, 2017 11:52 am
Forum: 240-300 "Big Block" Six Performance
Topic: Hei wiring 10v while cranking
Replies: 3
Views: 794

Re: Hei wiring 10v while cranking

What do you read at the battery while cranking? The starter normally pulls the system voltage down a bit, it's equal to a .7 to 1.0 ohm resistor shorting across the battery terminals.
by MechRick
Sun Sep 24, 2017 2:55 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Hotrod 300
Replies: 7
Views: 3152

Re: Hotrod 300

You've got the 8 lug truck to tow with, that will free you up to do some things to the 300. I wouldn't use the four-speed from the 3/4 ton parts truck. It's not the first trans that pops in my head when thinking 'performance'. Instead consider one of the early AOD autos worked over by someone who kn...
by MechRick
Tue Sep 05, 2017 8:24 am
Forum: Orphan Inlines
Topic: 1984 Ford 2.3L powered Bronco II
Replies: 150
Views: 41198

Re: 1984 Ford 2.3L powered Bronco II

Never got the chance to try it out on slopes. Webers are known for issues on slopes. This one got excess fuel on hard braking, so I imagine it would have problems on a down hill. The injection is worth 2 mpg and some torque.
by MechRick
Mon Sep 04, 2017 9:12 pm
Forum: Orphan Inlines
Topic: 1984 Ford 2.3L powered Bronco II
Replies: 150
Views: 41198

Re: 1984 Ford 2.3L powered Bronco II

The goop is body filler. It makes a level surface for silicone to seal.
It's very capable off road. I haven't had it on extreme trails yet.
My job has me bouncing around states, so I dropped the registration for now...
by MechRick
Fri Sep 01, 2017 12:16 am
Forum: Orphan Inlines
Topic: 1984 Ford 2.3L powered Bronco II
Replies: 150
Views: 41198

Re: 1984 Ford 2.3L powered Bronco II

It's been half a year since I've done any work to the Bronco. Jumped in it to move it a few weeks ago and it was a crank no start. Fuel pump failed (again). I think it may have been a fluke, the fuel system is clean. Warrantied it out, and since this is a trail vehicle, I cut an access hole in the b...
by MechRick
Fri Aug 25, 2017 4:25 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Galvanic corrosion - fasteners and fittings
Replies: 8
Views: 1325

Re: Galvanic corrosion - fasteners and fittings

Of the two forces at work, one you can deal with, the other's effects can be minimized. Galvanism requires an anode and a cathode separated by an electrolyte. In your case, the electrolytes are coolant and salt water. Coolant turns acidic with age, and when sandwiched between two dissimilar metals c...
by MechRick
Mon Aug 21, 2017 4:09 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 300 pops and gurgles when decelerating
Replies: 11
Views: 1604

Re: 300 pops and gurgles when decelerating

There are two valves on the air injection system, TAD (thermactor air diverter) and TAB (thermactor air bypass). The diverter valve sends air pump air upstream to the exhaust ports (the stainless manifold with six fittings), but only when cold. After dropping into closed loop, the air is routed (div...
by MechRick
Sun Aug 20, 2017 5:22 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 300 pops and gurgles when decelerating
Replies: 11
Views: 1604

Re: 300 pops and gurgles when decelerating

Anytime you get excess oxygen in the exhaust, from, say, a stuck thermactor bypass valve or broken exhaust manifold/pipe, this can happen.
by MechRick
Mon Jul 31, 2017 12:37 am
Forum: Turbo, Supercharger, and Nitrous
Topic: Supercharger on 300 6 misfiring at top end.
Replies: 4
Views: 1308

Re: Supercharger on 300 6 misfiring at top end.

You need to boost reference the fuel pump. The one blow thru I built I drilled and tapped the diaphragm reference hole in the mechanical fuel pump and ran a manifold vacuum line to that. If you use an electric you will need a fuel pressure regulator with a vacuum/pressure port. Whatever boost you ar...
by MechRick
Sun Jul 30, 2017 7:44 pm
Forum: Turbo, Supercharger, and Nitrous
Topic: Supercharger on 300 6 misfiring at top end.
Replies: 4
Views: 1308

Re: Supercharger on 300 6 misfiring at top end.

Draw through or blow through?
by MechRick
Sat Jul 22, 2017 8:31 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Compression on E85
Replies: 42
Views: 6190

Re: Compression on E85

I ran a turbo Mustang on E85 and 93 octane pump gas (duel fuel). It would ping on 93 in the summer but not on E85. Octane rating is clearly higher than pump gas. I've heard effective octane rating of 105, because it does run cooler than gas. To make best power you need to inject 35-40% more fuel tha...
by MechRick
Sat Jul 08, 2017 2:21 pm
Forum: 240-300 "Big Block" Six Performance
Topic: EFI manifolds or header for '84 F150
Replies: 13
Views: 2896

Re: EFI manifolds or header for '84 F150

http://www.superchevy.com/how-to/exhaust/0505phr-exh/

That's probably the best exhaust article I've seen. Covers V8 tuning more than sixes (pulses are different) but still a great article.
by MechRick
Fri Jul 07, 2017 6:38 pm
Forum: 240-300 "Big Block" Six Performance
Topic: EFI manifolds or header for '84 F150
Replies: 13
Views: 2896

Re: EFI manifolds or header for '84 F150

2.5" single exhaust, or bigger, would work fine. My current setup is EFI manifolds into dual inlet cat, 2.5" pipe into Y with two 2" tailpipes. Two 2" pipes have the same flow as a 2.7" single pipe. It is plenty. If you run duals with no crossover, the exhaust will be much l...
by MechRick
Wed Jul 05, 2017 3:25 pm
Forum: 240-300 "Big Block" Six Performance
Topic: EFI manifolds or header for '84 F150
Replies: 13
Views: 2896

Re: EFI manifolds or header for '84 F150

Clearance may be an issue with EFI exhaust manifolds. Hopefully someone on the forum has actual experience with your combination of parts. I had to do a bit of grinding on an Offy to clear. As far as performance, I switched from EFI manifolds to a header and back to EFI manifolds. Didn't notice much...
by MechRick
Tue Jul 04, 2017 9:07 pm
Forum: Turbo, Supercharger, and Nitrous
Topic: Bench racing Heavy Hauler
Replies: 16
Views: 2947

Re: Bench racing Heavy Hauler

Now that I have a tow mule, if I stumble across an early club or crew cab I might start a project like that, I can take my time with one now.
by MechRick
Mon Jul 03, 2017 10:25 pm
Forum: Turbo, Supercharger, and Nitrous
Topic: Bench racing Heavy Hauler
Replies: 16
Views: 2947

Re: Bench racing Heavy Hauler

For now, I found a 1988 f250 2x4 extended cab long bed, 460 5 speed. Low miles (105k). Should do a better job pulling than my half ton.
by MechRick
Mon Jun 26, 2017 11:02 pm
Forum: Turbo, Supercharger, and Nitrous
Topic: 1994 Microsquirt/turbo
Replies: 13
Views: 3175

Re: 1994 Microsquirt/turbo

A 460 is a big bore (relatively) short stroke engine. They have great potential, but the power delivery is different than the 300. Peak torque on the six happens around 1700 rpm. The big block makes more torque, but at a higher rpm. A turbocharged 300 will run like a diesel. Another good truck optio...
by MechRick
Sun Apr 30, 2017 8:41 pm
Forum: Turbo, Supercharger, and Nitrous
Topic: Fuel efficiency
Replies: 8
Views: 2087

Re: Fuel efficiency

I think you are right. We can further postulate that if the turbo pipe was removed while the engine was at say, 1500 RPM, the RPM would drop a bit. It would be a good test.

I believe the engine would need more throttle to maintain the same output.

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