Click Here -> Please Consider Making a PayPal Contribution to the FordSix Forum!
2019 Contributors:
NJwpod, 1strodeo, mightynorseman, maxtrux, 6d7coupe, broncr, Phase3, 68Flareside240, bmbm40,
mustang6, WorldChampGramp, justintendo, BigBlue94, ags290, motorsickle1130, Rooster, ousooner919, ethanperry
rzcrisis, DoctorC, jamyers, Motorboy, fastpat, Silverback280, chad


<<< New Site Update >>>

Search found 430 matches

by guhfluh
Tue Dec 10, 2019 6:43 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Engine doesn't like a lot of timing.
Replies: 25
Views: 481

Re: Engine doesn't like a lot of timing.

I haven't looked up the info, but as far as I can tell looking at them, they are around the same "heat range" plugs, just the EFI plug electrodes are much longer. I can see it creating a hot spot for preignition in an extreme scenario. I think I'd want to run a cooler plug in a forced indu...
by guhfluh
Sun Dec 08, 2019 7:46 pm
Forum: Turbo, Supercharger, and Nitrous
Topic: Ford should have done it
Replies: 43
Views: 873

Re: Ford should have done it

I also want to mention, I was looking at my engines a day or so ago, looking at where would be a good place for the turbo and piping, and I also thought that below the alternator would be a good place, but that it is a tight fit with my v-belt drive mounting. Looking at the serpentine belt mounting ...
by guhfluh
Sun Dec 08, 2019 4:23 pm
Forum: Turbo, Supercharger, and Nitrous
Topic: Ford should have done it
Replies: 43
Views: 873

Re: Ford should have done it

A turbo blanket should suffice and is inexpensive. It will accelerate rust in my wet climate. But my experience with coating and a SS shield is its still very hot.
by guhfluh
Sun Dec 08, 2019 1:30 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Chrome vs moly rings
Replies: 3
Views: 129

Re: Chrome vs moly rings

Probably only worthwhile if intended for high performance I'd guess. I'm no ring expert though.
by guhfluh
Sun Dec 08, 2019 12:01 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Chrome vs moly rings
Replies: 3
Views: 129

Re: Chrome vs moly rings

Just because chrome is hard, can flake and not as easy to break in or seat, I like the more modern moly design. I'm not sure the benefits of chrome, other than maybe wear resistance? I was thinking chrome may be hard on the cyls and wear them faster, but that may be more of steel rings vs ductile or...
by guhfluh
Fri Dec 06, 2019 5:08 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Engine doesn't like a lot of timing.
Replies: 25
Views: 481

Re: Engine doesn't like a lot of timing.

Speak of the devil...

https://www.facebook.com/groups/megasqu ... 6&sfnsn=mo

Link G4 knockblock just posted for sale on Facebook MSEFI group.
by guhfluh
Fri Dec 06, 2019 3:56 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Engine doesn't like a lot of timing.
Replies: 25
Views: 481

Re: Engine doesn't like a lot of timing.

Please show where the Holley Sniper EFI system can take a direct knock sensor input signal and do something with it. On second look, it appears that only the Super Sniper can do that. Bummer. But, it comes with 3 input wires which can be configured. Basically, just showing between 1 and 5 volts. No...
by guhfluh
Fri Dec 06, 2019 2:44 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Engine doesn't like a lot of timing.
Replies: 25
Views: 481

Re: Engine doesn't like a lot of timing.

Most knock sensors contain a piezoelectric element (crystal) that is tuned for the specific frequency that is produced by a particular engine and is a narrow band device. Output is in tenths of a volt, the amplitude depending on the intensity of detonation and can be used directly with the Holley E...
by guhfluh
Fri Dec 06, 2019 1:28 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Engine doesn't like a lot of timing.
Replies: 25
Views: 481

Re: Engine doesn't like a lot of timing.

The only two knock modules I'd consider trying would be from Plex or Link. Knock sensors need electronic circuitry to handle the small mv signal the sensor outputs and convert it to something useable. The sensor is basically just a microphone. I have wired a wide band sensor to a microphone input on...
by guhfluh
Fri Dec 06, 2019 1:21 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Engine doesn't like a lot of timing.
Replies: 25
Views: 481

Re: Engine doesn't like a lot of timing.

Detonation in a 4" bore has a frequency around 5.7 khz. The best way to detect that frequency is to use a Knock sensor. It will not respond unless it sees the high frequency detonation signal. That only works if using a narrow band sensor tuned to the specific frequency of the specific bore si...
by guhfluh
Fri Dec 06, 2019 12:18 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Adjustable Vacuum Canistor for 300 4.9L
Replies: 20
Views: 719

Re: Adjustable Vacuum Canistor for 300 4.9L

I'm still not convinced that neither of your vacuum advance canisters are adjustable. Have you tried multiple sizes of Allen wrenches inside the vacuum nipple hole? Basically every canister Ford supplied was adjustable and came adjusted at the factory to each engine and emission requirements, both s...
by guhfluh
Fri Dec 06, 2019 12:04 am
Forum: 240-300 "Big Block" Six Performance
Topic: Another piston and connecting rod combination
Replies: 20
Views: 787

Re: Another piston and connecting rod combination

the follow on logical question is : do spacers or shimming the rod end on its riding surface either the pin of crank, pose any potential problems? i mean is this a common solution to dimensional variance? if the LS world is available to us then we have truly found the pot at the end of the rainbow....
by guhfluh
Thu Dec 05, 2019 7:19 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Adjustable Vacuum Canistor for 300 4.9L
Replies: 20
Views: 719

Re: Adjustable Vacuum Canistor for 300 4.9L

guhfluh -- As I am locater in CA lots of ignition parts are not found at our local parts stores because of the smog rules. Good part is my 1971 F250 300 4.9L is exempt (pre 1975). Where are you located? Can you get me a O'Reilly's Part number for an adjustable distributor vacuum advance canister li...
by guhfluh
Tue Dec 03, 2019 4:48 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Adjustable Vacuum Canistor for 300 4.9L
Replies: 20
Views: 719

Re: Adjustable Vacuum Canistor for 300 4.9L

Mine came on my refurbished distributor I purchased through O'Reilly's for a 1968 F100 300. It is internally adjustable with an allen through the vacuum tube hole.
by guhfluh
Fri Nov 01, 2019 3:30 pm
Forum: Fuel Injection - Mega Squirt
Topic: How to add computer controlled timing
Replies: 22
Views: 674

Re: How to add computer controlled timing

From what ive seen, For the TFI distributor, you have to wire the hall effect up to switched 12v power, ground(or Sniper green wire) and the Sniper trigger input(purple wire). Modify the reluctor wheel to have even vanes. Set everything else up as Holley suggests for their Dual Sync distributor. As ...
by guhfluh
Thu Oct 31, 2019 1:25 pm
Forum: Fuel Injection - Mega Squirt
Topic: How to add computer controlled timing
Replies: 22
Views: 674

Re: How to add computer controlled timing

Ok. Help me out here, I’m getting hung up on this one... The f150s in 1996 that came with a 300 had sequential fuel injection and computer controlled spark. No crank trigger. Why is this any different? Signature PIP. A pattern at cam speed with at least enough pulses for each cylinder plus one diff...
by guhfluh
Thu Oct 31, 2019 12:36 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Loss of compression in all cylinders
Replies: 43
Views: 2030

Re: Loss of compression in all cylinders

From what I see in the bore pictures, I see some detonation speckles, but I also see what appears to be ash and carbon deposit buildup from what I'd say is some oil ingestion. Oil contamination leads to preignition and detonation, so it's hard to say cause and effect, but I figured I'd throw in my o...
by guhfluh
Thu Oct 10, 2019 4:52 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Intermittent miss
Replies: 16
Views: 1218

Re: Intermittent miss

I have tries to set the vacuum advance curve not quite sure I have it right. If I try to pass or get on it it stumbles and backfires on 4th and 5th gear Does it 'stumble and backfire' with the vacuum advance unplugged? I'm going to echo my post above, simply because I've seen this sooo many times s...
by guhfluh
Fri Oct 04, 2019 2:21 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Lower EFI intake runner for performance?
Replies: 2
Views: 674

Re: Lower EFI intake runner for performance?

Anyone know the runner length and diameters of the EFI lower? The length is 9.88" +/- 0.10" and the I.D. at entry is 1.625". I have not measured the port dimensions. Thank you. That is close to what I estimated and unfortunately what I feared the ID was near. It seems to me that the ...
by guhfluh
Thu Oct 03, 2019 7:41 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Lower EFI intake runner for performance?
Replies: 2
Views: 674

Lower EFI intake runner for performance?

Anyone know the runner length and diameters of the EFI lower? What is the effective head runner length/size to the back of the valve? What I'm curious about is the effective tuning RPM of just the lower and it's power potential or at what point it would become a restriction. I'm also interested in b...
by guhfluh
Thu Oct 03, 2019 7:07 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Carb Options For Offy Dual Plane on 240
Replies: 4
Views: 743

Re: Carb Options For Offy Dual Plane on 240

Anything is going to take some decent reworking of the factory linkage on a 72 to work sideways on a Dual Port manifold. What may work the best is a conversion to cable from a late 70's truck or something from Lokar that might convert the stock linkage.
by guhfluh
Thu Oct 03, 2019 6:59 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Y Pipe For EFI Exhaust Manifolds For 72 Model Year
Replies: 3
Views: 846

Re: Y Pipe For EFI Exhaust Manifolds For 72 Model Year

The Walker Y pipes are crinkle bent and the merge angle isn't the greatest, but still reported to work well. In some they also have a lot of material blocking the merge section that wasn't cut out of the pipe before the other one that is merging in is welded on. People just reach in with a grinder a...
by guhfluh
Thu Oct 03, 2019 3:05 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 300 Rebuild
Replies: 92
Views: 5721

Re: 300 Rebuild

Smart move, because if you have to go .060 over to clean the bores you may not have the cylinder wall thickness for it to work. I think .030 overbore is the normal max for a 300 block. Like you said don't waste money on a junk block. Your list of new engine parts sounds real good, good building. Na...
by guhfluh
Thu Oct 03, 2019 2:59 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Intermittent miss
Replies: 16
Views: 1218

Re: Intermittent miss

Just a note here that may at least help it run better. The distributor you purchased probably does not have the correct ignition curve for a 1990 EFI headed 300. If you used the 1990 head on the engine when you swapped it into your truck, it probably needs a lot less advance curve under cruise and l...
by guhfluh
Sun Sep 22, 2019 3:41 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Ford 240/300 P&C Distributor As A Spare
Replies: 7
Views: 946

Re: Ford 240/300 P&C Distributor As A Spare

I noticed one of those links is an original new Ford/Autolite distributor that isn't rebuilt for about $120. Just in case you missed it.

I don't have a spare though. I wish I had kept my original load-o-matic instead of trading it in for a core.
by guhfluh
Sun Sep 22, 2019 3:36 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 1988 F-150: Hood latch modifications to fit huge intercooler
Replies: 6
Views: 611

Re: 1988 F-150: Hood latch modifications to fit huge intercooler

You should be fine without it, but bracing would be nice, as well as bracing with/through the intercooler.

Expect decreased A/C performance.
by guhfluh
Sun Sep 22, 2019 3:30 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Radiator Help Needed
Replies: 3
Views: 493

Re: Radiator Help Needed

I have a 72 F100 - 240 … The radiator it currently has is shot and cannot be repaired. The original core measures 17.25H x 20W with mounting holes measuring 23" from center to center. There is another wider set of holes that measure 28.5" center to center but I would have to move my overf...
by guhfluh
Mon Sep 16, 2019 8:43 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Progress on the '56. Help decide on this motor!
Replies: 94
Views: 4921

Re: Progress on the '56. Help decide on this motor!

https://www.diyautotune.com/support/tech/inside-the-v3-57-board/ I've installed 3.57 boards in cars, and am ok with it. Prefer leads that go through holes and soldered for off road stuff. Bruh, I'm so sorry. I had a major brain fart on smt vs through board. I thought you were recommending the smt b...
by guhfluh
Mon Sep 16, 2019 4:37 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Progress on the '56. Help decide on this motor!
Replies: 94
Views: 4921

Re: Progress on the '56. Help decide on this motor!

Multiport with individual coils can be done with Megasquirt 1 with extra code (I prefer V3.0 boards in vibration ridden trucks, no surface mount components). Simple and cheap. It's possible to control TBI injectors with Megasquirt. They don't like low impedance injectors, but you can get 100 lb-hr ...
by guhfluh
Mon Sep 16, 2019 4:25 pm
Forum: Turbo, Supercharger, and Nitrous
Topic: turbo 200 build
Replies: 163
Views: 28529

Re: turbo 200 build

If injector overheat is the issue, it may be easier to upgrade to a modern high impedance pencil style injector that handles heat better. Another thing I can't tell from the pictures or the video is how the fuel flow is routed. Fuel should be circulated from the pump through the rail from one end to...
by guhfluh
Sun Aug 25, 2019 11:15 am
Forum: 240-300 "Big Block" Six Performance
Topic: Extrude Hone for 300/4.9L engines
Replies: 21
Views: 1137

Re: Extrude Hone for 300/4.9L engines

You can have a cam made with less lobe lift and long duration but it is better to have higher lift cam lobes with lower rocker ratios than low lobe lift and high rocker ratios. Can you explain why that is? It's always seemed to me that it would be the opposite, to a certain point, as it should keep...
by guhfluh
Fri Aug 23, 2019 9:33 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 484
Views: 70642

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

F-250 Restorer wrote:Is there a link to where I can check the flow results and the prices for the diff. heads?

viewtopic.php?f=2&t=77978
by guhfluh
Fri Aug 23, 2019 10:06 am
Forum: 240-300 "Big Block" Six Performance
Topic: Progress on the '56. Help decide on this motor!
Replies: 94
Views: 4921

Re: Progress on the '56. Help decide on this motor!

Thanks. So it sounds like its a constant flow delivery? No, it's a progressively controlled, PWM pump speed output based upon user defined boost pressures and ramp rate. Mine started around 10psi and all in above 21psi, though I did try starting around 1psi and saw quicker spool and boost came on q...
by guhfluh
Fri Aug 23, 2019 8:57 am
Forum: 240-300 "Big Block" Six Performance
Topic: Progress on the '56. Help decide on this motor!
Replies: 94
Views: 4921

Re: Progress on the '56. Help decide on this motor!

I have had success in the past using single nozzle 1000cc pure meth injection with 93 octane at the 500hp and 28psi level on my 2.4L 4cyl. What size nozzle and at what injection pressure? It is AEM's single nozzle progressive kit and large nozzle. They say it's 200psi for the pump and the nozzle is...
by guhfluh
Thu Aug 22, 2019 10:11 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Extrude Hone for 300/4.9L engines
Replies: 21
Views: 1137

Re: Extrude Hone for 300/4.9L engines

Pmuller, at what point are the longer valves needed? Part of it is availability. AFAIK SI valves is the only place that has the pre 1985 4.810" stock length 300 six oversized valves in 1.94" intake and 1.60" exhaust. Other than that the SBC valves that fit the 300 six head start at 4...
by guhfluh
Thu Aug 22, 2019 8:29 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Extrude Hone for 300/4.9L engines
Replies: 21
Views: 1137

Re: Extrude Hone for 300/4.9L engines

Pmuller, at what point are the longer valves needed?
by guhfluh
Thu Aug 22, 2019 8:17 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Progress on the '56. Help decide on this motor!
Replies: 94
Views: 4921

Re: Progress on the '56. Help decide on this motor!

Not sure I've ever known anyone to drive 2000 miles nonstop or how much fuel that would actually take, but I understand that not everyone likes to use water/meth injection and the downsides to using it. I like using methanol or water/meth in certain instances, but my biggest concern is always the di...
by guhfluh
Wed Aug 21, 2019 7:48 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Tri Power Again
Replies: 140
Views: 19406

Re: Tri Power Again

I don't know why it should go lean on a tip-in. Maybe check your accelerator pump circuit to make sure it is not leaking back down or not filling properly. Well with the 3 carbs working together, I didn’t set it up progressive you barley need to move the peddle. So the accelerator pumps just dribbl...
by guhfluh
Wed Aug 21, 2019 7:23 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Progress on the '56. Help decide on this motor!
Replies: 94
Views: 4921

Re: Progress on the '56. Help decide on this motor!

Non-intercooled with the Sniper TBI ahead of the SC would be the way to go, but with that type of SC, I'd worry more about fuel distribution with the inlet and outlet style of the SC and fuel running through it. I'd want to run a tapered style adapter from the SC to a carb style OFFY C or Clifford v...
by guhfluh
Wed Aug 21, 2019 7:11 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Extrude Hone for 300/4.9L engines
Replies: 21
Views: 1137

Re: Extrude Hone for 300/4.9L engines

I really like this method of opening up the intake manifold on this engine. It works on the whole length of the manifold and improves it all. It's no cheap, at $755.00 (as of 8/20/2019), it's still cost effective compared to someone trying to use a hand grinder to do the same. Extrude hone has been...
by guhfluh
Wed Jul 24, 2019 11:39 am
Forum: Turbo, Supercharger, and Nitrous
Topic: turbo 200 build
Replies: 163
Views: 28529

Re: turbo 200 build

What injectors are being run?

Many of those older style have issues with heat. There is also the possibility of injector driver overheat, depending on what injector ohm range, how they're wired and how they're driven.
by guhfluh
Wed Jul 17, 2019 10:07 am
Forum: 240-300 "Big Block" Six Performance
Topic: slanting a 300
Replies: 12
Views: 1009

Re: slanting a 300

Don't forget about starter clearances and engagement.
by guhfluh
Wed Jul 17, 2019 10:04 am
Forum: 240-300 "Big Block" Six Performance
Topic: 240 cooling fan
Replies: 7
Views: 730

Re: 240 cooling fan

FWIW, it will not stay cool without a shroud and with A/C. Been there, even with oversized V8 radiator.

Make sure the clutch is operational. It should be locked up solid when hot.
by guhfluh
Sun Jul 14, 2019 9:11 pm
Forum: Turbo, Supercharger, and Nitrous
Topic: 300 Turbo Cam
Replies: 23
Views: 1794

Re: 300 Turbo Cam

Im going to try a comp 268h but i dont believe its the right direction for the best turbo performance. A larger cam works if you are looking at a higher rpm power band to make more HP. The single pattern cam is OK if you are not using a log type exhaust manifold. You really want a wider LSA than th...
by guhfluh
Thu Jul 11, 2019 1:42 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Edelbrock avs2 1901
Replies: 12
Views: 1305

Re: Edelbrock avs2 1901

I really want to try a Street Demon. I'm still using the basic Edelbrock 500 without tunable secondaries. I've put a 1" insulated spacer on in place of an aluminum one I had on and I didn't see any benefit. I still get boil over after a hot shut down. I don't have issues with it while it's runn...
by guhfluh
Thu Jul 11, 2019 1:29 pm
Forum: 240-300 "Big Block" Six Performance
Topic: So I have a plan but now im Second guessing myself.
Replies: 120
Views: 6730

Re: So I have a plan but now im Second guessing myself.

Yeah, I'm confused. First you said exhaust at .105", then .050", then ICL. I'd remeasure it all a few times to be sure.
by guhfluh
Tue Jul 09, 2019 10:45 pm
Forum: 240-300 "Big Block" Six Performance
Topic: So I have a plan but now im Second guessing myself.
Replies: 120
Views: 6730

Re: So I have a plan but now im Second guessing myself.

By the way, that looks advanced...depending what is true TDC on the balancer.
by guhfluh
Tue Jul 09, 2019 10:15 pm
Forum: 240-300 "Big Block" Six Performance
Topic: So I have a plan but now im Second guessing myself.
Replies: 120
Views: 6730

Re: So I have a plan but now im Second guessing myself.

Verify TDC with a piston stop and re-mark the balancer.
by guhfluh
Tue Jul 09, 2019 3:05 pm
Forum: 240-300 "Big Block" Six Performance
Topic: So I have a plan but now im Second guessing myself.
Replies: 120
Views: 6730

Re: So I have a plan but now im Second guessing myself.

I haven't followed this from the beginning, but question the cam choice for a low rpm field truck with 2.73 gears. I agree with going back to the stock rockers. I would also try tuning the carb and timing more. Give it manifold heat if it wants it. My cam is advanced 4* with Cloyes gears, but no deg...

Go to advanced search