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by SuperMag
Sun Jan 12, 2020 2:52 pm
Forum: Announcements
Topic: Major forum upgrade coming soon!
Replies: 56
Views: 91796

Re: Major forum upgrade coming soon!

Fingers crossed... losing all the old tech posts would be a tragedy.
by SuperMag
Sun Jan 12, 2020 2:09 pm
Forum: 240-300 "Big Block" Six Performance
Topic: First three plugs look great, second three...
Replies: 5
Views: 668

Re: First three plugs look great, second three...

The last time I had plugs that looked like that was because of broken rings. The worst one you have there was identical to a cylinder that had both compression rings broken and scored cylinder wall.

Ditto the suggestion to start with a compression test.
by SuperMag
Thu Aug 18, 2016 7:22 pm
Forum: The Saloon
Topic: Where are they now?
Replies: 79
Views: 23307

Re: Where are they now?

ludwig wrote:I don't think so. My wife keeps telling me to grow up.


That's her way of telling you to quit buying green bananas. :wink:
by SuperMag
Thu Aug 18, 2016 12:19 am
Forum: The Saloon
Topic: Where are they now?
Replies: 79
Views: 23307

Re: Where are they now?

ludwig wrote:....I graduated from high school in 1969.


Holy crap you're old. :nod:
by SuperMag
Wed Feb 11, 2015 11:52 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Crank scraper?
Replies: 16
Views: 5742

Re: Crank scraper?

arse_sidewards wrote:
What does the front seat of a Subaru wagon have in common with the engine?

It's where the wheel is?
by SuperMag
Wed Feb 11, 2015 9:38 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 3 angle valve job on a lathe?
Replies: 7
Views: 1894

Re: 3 angle valve job on a lathe?

...You can do a whole set of valves with a carbide tool in 5 minutes as opposed to all day with a grinding stone. Its just a matter of using the right tool for the job. On a 300, that's 25 seconds per valve including set-up. I wouldn't want those valves in my truck. A few winters ago I was bored an...
by SuperMag
Wed Feb 11, 2015 9:13 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Crank scraper?
Replies: 16
Views: 5742

Re: Crank scraper?

...While there may be some anecdotal stories of companies making bad decisions or even conspiratorial subterfuge... for the most part their decisions were sound. Including replacing the 460 with a Modular V10. From a historical perspective, I can totally get on board with that... Any time someone b...
by SuperMag
Tue Feb 10, 2015 1:32 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 3 angle valve job on a lathe?
Replies: 7
Views: 1894

Re: 3 angle valve job on a lathe?

...The problem I see here is that the wheel probably wears noticeably from valve to valve. Yep, lots of multi-passing & measuring. And keeping the wheel sufficiently dressed that the angle is maintained. Those dremel wheels are crap. It takes a lot of free time to do something like this. I coul...
by SuperMag
Mon Feb 09, 2015 8:19 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 3 angle valve job on a lathe?
Replies: 7
Views: 1894

Re: 3 angle valve job on a lathe?

Are you using a carriage-mounted grinder, or are you trying to cut it? If you're trying to use a cutter, that would be just this side of futile.
by SuperMag
Mon Feb 09, 2015 8:14 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Crank scraper?
Replies: 16
Views: 5742

Re: Crank scraper?

At what RPM does oil whipped up and around the crank cause a problem? (And how often is than an issue for a non-race Ford 300?)
by SuperMag
Sat Jan 31, 2015 1:09 am
Forum: 240-300 "Big Block" Six Performance
Topic: I need a waterpump pulley.........
Replies: 11
Views: 2192

Re: I need a waterpump pulley.........

clintonvillian wrote:...It had set for so long it is pitted and rust is flaking off of it.


Put the spinning wire brush to it and run it. Rust looks bad, but once you brush it & smooth it, it'll be fine.
by SuperMag
Thu Jan 22, 2015 12:40 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 300 six distrubuter gear specs
Replies: 8
Views: 1844

Re: 300 six distrubuter gear specs

...later model 5.0's also have a .531 shaft size but they also had a Roller Cam too so they used a steel gear that would chew up a non Roller cam. ... Indeed... Just for fun I jumped down the rabbit hole that is the Rock Auto alternate part number listings... I find a gear for '67 vintage 289s that...
by SuperMag
Wed Jan 21, 2015 10:31 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 300 six distrubuter gear specs
Replies: 8
Views: 1844

Re: 300 six distrubuter gear specs

OK, just because I've been to happy hour and feeling frisky... :P What difference does that make? As long as the dist turns 1:1 with the cam, does it matter if the gear comes from a V-8 or an I-6? Whether or not it's the same gear or not, I don't know. But it could be. Any parts counter guys out the...
by SuperMag
Sun Nov 30, 2014 12:27 pm
Forum: 240-300 "Big Block" Six Performance
Topic: tapping/threading cast iron
Replies: 12
Views: 2015

Re: tapping/threading cast iron

THE FRENCHTOWN FLYER wrote:...I like the idea of putting the plug in the rear cover. That way you completely eliminate the possibility of a tapping chip finding its way into a bearing and ruining it...


A lot easier, too.
by SuperMag
Fri Nov 07, 2014 5:20 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 1988 Mustang Big 6 Swap
Replies: 28
Views: 5508

Re: 1988 Mustang Big 6 Swap

For some reason, 540# w/o flywheel sticks in my mind for the pre-87 Big 6.
by SuperMag
Tue Oct 28, 2014 3:23 pm
Forum: 240-300 "Big Block" Six Performance
Topic: radiator question
Replies: 20
Views: 3826

Re: radiator question

Except that the 300 head does NOT tolerate being run hot. So an insufficiently sized radiator would be a concern.
by SuperMag
Mon Oct 06, 2014 11:19 am
Forum: 240-300 "Big Block" Six Performance
Topic: Link to a thread about a recipe for gas mileage [4.9L/300].
Replies: 19
Views: 4556

Re: Link to a thread about a recipe for gas mileage [4.9L/30

So, as I understand it, one is retarding the spark advance to reduce MV by 1" not because that's where the engine is most efficient but as a band aid to compensate for the fact that that optimun advance is in the danger zone with the specified fuel that one is using with too low of an octane r...
by SuperMag
Mon Oct 06, 2014 10:42 am
Forum: 240-300 "Big Block" Six Performance
Topic: Link to a thread about a recipe for gas mileage [4.9L/300].
Replies: 19
Views: 4556

Re: Link to a thread about a recipe for gas mileage [4.9L/30

Connect distributor and vacuum gauge to manifold vacuum (not ported carb vacuum). I've read about setting timing with the vac gauge before ( I think F250 restorer had a good write up on it a couple years ago), but This is the first I've seen that the Distributor vacuum advance line is not plugged, ...
by SuperMag
Sun Oct 05, 2014 8:36 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Link to a thread about a recipe for gas mileage [4.9L/300].
Replies: 19
Views: 4556

Re: Link to a thread about a recipe for gas mileage [4.9L/30

When I first heard of this method, that's the first question that popped into my mind. So, renegade that I am, I tried it with full vacuum. Too much vacuum advance; I got ping at partial throttle/high vacuum. The way I figure it, when you set the timing using the vacuum method, you're doing it idle ...
by SuperMag
Sat Oct 04, 2014 12:43 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Link to a thread about a recipe for gas mileage [4.9L/300].
Replies: 19
Views: 4556

Re: Link to a thread about a recipe for gas mileage [4.9L/30

I'd be curious to know how he checks advance via vacuum (I know if you do the DSII conversion, it's a vacuum advance distributor, but how do you get timing from that? I only ask because the timing notches and marks on these engines suck pretty hard for location) Once you learn how to set timing wit...
by SuperMag
Mon Sep 29, 2014 4:53 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Link to a thread about a recipe for gas mileage [4.9L/300].
Replies: 19
Views: 4556

Re: Link to a thread about a recipe for gas mileage [4.9L/30

His experience is very similar to my own... The original feedback/ECM controlled fuel system was totally non-functional (9 mpg), so off it all came. My setup as dumbed down for mileage: 2x4 1986 Long bed, Np435 4 spd, start odo was 148K Re-man'd Carb from a '72 vintage 300 Reman'd Points dist. from ...
by SuperMag
Sat Jul 26, 2014 11:32 am
Forum: 240-300 "Big Block" Six Performance
Topic: New lifters, old cam--questions!
Replies: 26
Views: 4945

Re: New lifters, old cam--questions!

Oregoon wrote: ...wife got some great work-related news today and it frees her up to continue bicycling or walking to work... She points out that we save just for things like new engines...


The wife walks to work so you can buy a new engine? Wow. You're living the dream. You know that, right? :nod:
by SuperMag
Fri Jul 25, 2014 6:14 pm
Forum: 240-300 "Big Block" Six Performance
Topic: New lifters, old cam--questions!
Replies: 26
Views: 4945

Re: New lifters, old cam--questions!

It still sounds like it's coming from #5. Wrist pin? Valve spring? Damn it. :( A few thoughts: Run it with the rocker box off. Place your finger on the rockers close to the pivot point as they operate. Valvetrain related issues should be pretty apparent at this point. (Bad rocker and/or pivot?) Add...
by SuperMag
Fri Jul 25, 2014 2:23 pm
Forum: 240-300 "Big Block" Six Performance
Topic: New lifters, old cam--questions!
Replies: 26
Views: 4945

Re: New lifters, old cam--questions!

40-50 at start up (no tick) 20 at warm ildle (tick-tick-tick)... I've seen quiet motors run a lot less. Another thing you're no doubt considering is, at what point do you stop (or start) throwing money at a $125 motor? I haven't tried lately, but used to be you could buy lifters by the each ... :hm...
by SuperMag
Fri Jul 25, 2014 12:31 am
Forum: 240-300 "Big Block" Six Performance
Topic: New lifters, old cam--questions!
Replies: 26
Views: 4945

Re: New lifters, old cam--questions!

What's the oil pressure when things are ticking?
by SuperMag
Fri Jul 18, 2014 1:28 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Where'd the 300 FAQ go?
Replies: 15
Views: 5028

Re: Where'd the 300 FAQ go?

I know where to find the 300 FAQ, and everyone else seems to think the new arrangement is cool, so I'll just be quiet now. :D
by SuperMag
Fri Jul 18, 2014 12:05 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Where'd the 300 FAQ go?
Replies: 15
Views: 5028

Re: Where'd the 300 FAQ go?

... but i am always open to suggestions... How about a sticky in this forum linking to the FAQ, wherever it is? Even long-time idiots like me consult the FAQ from time to time, and if it weren't for my smart mouth popping off here, I'd've never found it. We recently had a promising member who was d...
by SuperMag
Thu Jul 17, 2014 12:57 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Where'd the 300 FAQ go?
Replies: 15
Views: 5028

Re: Where'd the 300 FAQ go?

Of course. How stupid of me. I must have lost my mind to expect to find the big six FAQ in the big six forum... :?
by SuperMag
Wed Jul 16, 2014 11:58 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Where'd the 300 FAQ go?
Replies: 15
Views: 5028

Where'd the 300 FAQ go?

Where'd the 300 FAQ go?
by SuperMag
Mon Jun 30, 2014 1:08 am
Forum: 240-300 "Big Block" Six Performance
Topic: Transmission is spinning while in neutral????
Replies: 12
Views: 3241

Re: Transmission is spinning while in neutral????

..Just making sure you knew that and were putting 90w in anyway, as opposed to being one of those people who thinks the thickest oil is always the best. When I first got the truck years ago, the tranny was a bit noisy so the first thing I did was change the oil. What came out was ATF... :? So in we...
by SuperMag
Wed Jun 25, 2014 12:18 pm
Forum: 240-300 "Big Block" Six Performance
Topic: After pulling the EGR ...
Replies: 25
Views: 4393

Re: After pulling the EGR ...

I'm glad you brought up diesel engines... Any advantage a diesel engine has in pumping losses on the intake is dwarfed by the downside created by the need to compress a full cylinder of air just before every power stroke, with said dwarfing factor being almost directly proportional to the compressio...
by SuperMag
Wed Jun 25, 2014 12:02 am
Forum: 240-300 "Big Block" Six Performance
Topic: After pulling the EGR ...
Replies: 25
Views: 4393

Re: After pulling the EGR ...

You can notice the same effect when driving at high altitudes. The air is less dense, it takes more throttle to maintain the same speed, so pumping losses go down, mpg goes up. Actually, in today's exquisitely managed fuel systems, altitude makes no (observable) difference.* It takes 'X' amount of ...
by SuperMag
Tue Jun 24, 2014 11:44 pm
Forum: 240-300 "Big Block" Six Performance
Topic: After pulling the EGR ...
Replies: 25
Views: 4393

Re: After pulling the EGR ...

OK, time for ol' SM to stir things up like he used to... I'm not buying the pumping loss thing. First off, if one piston is going down, another is going up, so the net pressure in the crankcase resisting the pumping action is nil. Particularly if the PCV system is pulling a (small) vacuum. I'm speak...
by SuperMag
Mon Jun 23, 2014 10:42 am
Forum: 240-300 "Big Block" Six Performance
Topic: Transmission is spinning while in neutral????
Replies: 12
Views: 3241

Re: Transmission is spinning while in neutral????

Not to worry 8) When it is in neutral, there is enough drag caused by the oil to induce rotation of the output shaft. It won't transmit enough force to actually move the vehicle though. Joe It might... :wink: I run SAE 90 in my Np435, and on a really cold morning --by that I mean about -20°-- RPMs ...
by SuperMag
Sun May 18, 2014 12:38 am
Forum: The Saloon
Topic: Where are they now?
Replies: 79
Views: 23307

Re: Where are they now?

Tranny Poll? I don't remember being involved in anything like that. Sounds painful, X. Maybe that's why I left? I miss Addo and Supermag You were always the emotional one. You remind me of I guy I knew in high school. We called him Chuckles. He got so mad when we did that. one guy i miss is team sou...
by SuperMag
Mon Nov 10, 2008 7:07 pm
Forum: 240-300 "Big Block" Six Performance
Topic: tranny poll
Replies: 32
Views: 4783

Craigwell wrote:NP435, T18 get my votes.


I've had a couple of NPs and a few T18s over the years, but I'm inclined to give the T-18 the nod. The linkage of the NP435 is floppier than the T18, and is prone to flop right out of gear on rough, wash-boarded mountain roads...
by SuperMag
Sat Nov 08, 2008 11:52 pm
Forum: 240-300 "Big Block" Six Performance
Topic: She's LAZY
Replies: 13
Views: 2111

1987? As in fuel injected? Check your fuel pressure... low fuel pressure = poor injector performance. But your mileage sounds about right. As others have said, you are NOT aerodynamic, and you are NOT light. Add to that the fact the C6 imposes a parasitic loss of something like 30HP... Add it all up...
by SuperMag
Sat Nov 08, 2008 11:39 pm
Forum: 240-300 "Big Block" Six Performance
Topic: POINTS POINTS POINTS ANY ONE THE GAP
Replies: 10
Views: 3338

.025"... or danged close to the thickness of a credit card.

(The thickness of a matchbook cover is .012", and woefully inadequate for a point gap. ;) )
by SuperMag
Tue Oct 28, 2008 1:37 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Reverse coolant flow
Replies: 13
Views: 2728

The thermostat opens very slowly, and at -35° it never opens much more than a crack. I don't think thermal 'slamming' is much of an issue.
by SuperMag
Fri Oct 24, 2008 10:01 am
Forum: 240-300 "Big Block" Six Performance
Topic: #6 exhaust valve leak and rebuild
Replies: 18
Views: 3665

chexmix wrote:I change the oil bi-annually regardless of miles.


You mean semi-annually, right? :lol:
by SuperMag
Mon Sep 08, 2008 1:07 am
Forum: 240-300 "Big Block" Six Performance
Topic: Fuel mileage comparison, YF versus Autolite 1101
Replies: 7
Views: 1795

cdherman wrote: The YF ran just as well and got at least 3 mpg better mileage.


Sounds about right. :D
by SuperMag
Thu Jul 24, 2008 5:59 pm
Forum: 240-300 "Big Block" Six Performance
Topic: efi friendly cam?
Replies: 61
Views: 13602

Frankenstein F-150 wrote: ... i want the truck to run like a raped ape off road. I'd like get decent fuel economy, and not mess up the efi settings. ...[and] that will last me forever.


That's like finding a girl with big-uns, a genius IQ, her own money, and who loves you for who you are. Good luck with that. :lol:
by SuperMag
Thu Jul 17, 2008 11:19 pm
Forum: 240-300 "Big Block" Six Performance
Topic: How much compresion is too much?
Replies: 3
Views: 1260

How good of a driver are you? Are you top echelon, where .04 seconds off your lap time is critical? Or are you like most guys I know, where race day winnings might cover domestic beer for the crew? If you're the latter, you'd be ahead of the pack to build for reliability; you know, more time driving...
by SuperMag
Thu Jun 12, 2008 12:41 pm
Forum: The Truck Stop
Topic: front end I beam bushing on a 93 f-250
Replies: 17
Views: 4063

A couple of years ago I had the radius arm and I-beam bushings done for $225. That and septic tank pumping are right up there as things you don't really want to do yourself. :wink:
by SuperMag
Thu Jun 12, 2008 12:26 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Incorrect Carter YFA metering rod?
Replies: 7
Views: 3016

56mulberry wrote: ...I was able to ascertain that the remann'd one is assembled incorrectly...


Not surprising when you think of who is putting these things back together... (check the "made in" label on the box.) I had to rebuild the rebuilt carb I bought for my truck... :roll:
by SuperMag
Wed Jun 11, 2008 12:16 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Sick 300
Replies: 19
Views: 4063

I don't think it's top end issues-- these don't show any improvement in compression when you wet the rings... A vacuum gauge will, however, indicate top end problems (with the intake valves) if they are present. Economical solution? I don't know of one. The cheapest I think you are looking at is a j...
by SuperMag
Wed Jun 11, 2008 11:59 am
Forum: 240-300 "Big Block" Six Performance
Topic: Incorrect Carter YFA metering rod?
Replies: 7
Views: 3016

I can't speak to the part numbers, but the metering rod should definitely NOT bottom out short of the full travel of the mechanism... As you've probably sussed, the metering rod is vacuum actuated; the more vacuum present, the more its sucked down into the jet, thus leaning the mixture; full at-spee...
by SuperMag
Mon Jun 09, 2008 1:53 pm
Forum: 240-300 "Big Block" Six Performance
Topic: YFA Metering rod setting
Replies: 4
Views: 1146

Screw it to the left (CCW) to lean it out. That should lower the metering rod into the main jet causing a greater fuel restriction. Since you are noticeably rich start with half a turn and then go in quarter turn increments until you're happy. Let us know the results. If I may add to that... After ...
by SuperMag
Tue May 27, 2008 11:32 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Serious questions about Dual Straight Piping
Replies: 14
Views: 3258

The best sound on these trucks is the one that lets you creep around on the mountain logging roads without scaring away the game. And as luck would have it, it's the same sound that lets you talk to your girl without having to yell in her ear... :wink:
by SuperMag
Fri May 23, 2008 12:53 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Tuning question
Replies: 6
Views: 1612

Advance your timing a bit.

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