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Search found 5838 matches

by THE FRENCHTOWN FLYER
Sun Jun 16, 2019 8:47 am
Forum: 240-300 "Big Block" Six Performance
Topic: Another piston question
Replies: 17
Views: 457

Re: Another piston question

Are you going to run TWO 2V carbs? If so I would like to offer a differing opinion. This is purely anecdotal evidence based only on my own experiences racing my own junk which include two 2 x 2V equipped drag cars for what its worth. On my drag truck in particular, I have it set up for maximum consi...
by THE FRENCHTOWN FLYER
Sat Jun 15, 2019 6:56 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 1988 F150 300 top end rebuild
Replies: 6
Views: 189

Re: 1988 F150 300 top end rebuild

Best bang-for-the-buck: Low restriction exhaust system
by THE FRENCHTOWN FLYER
Sat Jun 15, 2019 9:38 am
Forum: 240-300 "Big Block" Six Performance
Topic: serpentine belt conversion
Replies: 49
Views: 6452

Re: serpentine belt conversion

I checked out your build thread John. Nice work. I'd take any of your recommendations to the bank.
by THE FRENCHTOWN FLYER
Thu Jun 13, 2019 11:05 pm
Forum: 240-300 "Big Block" Six Performance
Topic: VINTAGE CHAMP CAR REPLICA BUILD
Replies: 51
Views: 5599

Re: VINTAGE CHAMP CAR REPLICA BUILD

https://img.photobucket.com/albums/v608/6racer/SPEEDRACER/sr_shell_19_zpsumcloqhz.jpg https://img.photobucket.com/albums/v608/6racer/SPEEDRACER/sr_shell_23_zpsxcztwkcg.jpg https://img.photobucket.com/albums/v608/6racer/SPEEDRACER/sr_shell_26_zpslk9rxyeu.jpg https://img.photobucket.com/albums/v608/6...
by THE FRENCHTOWN FLYER
Thu Jun 13, 2019 8:29 am
Forum: 240-300 "Big Block" Six Performance
Topic: Priority main oiling?
Replies: 4
Views: 175

Re: Priority main oiling?

The oiling system is very robust. I've had a couple of instances where I lost oil pressure (long stories) and no damage was done when I took things apart to inspect.
by THE FRENCHTOWN FLYER
Wed Jun 12, 2019 7:52 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Carter YF tuning advice needed (again)
Replies: 4
Views: 232

Re: Carter YF tuning advice needed (again)

Nice, clean install. Let us know how you like the 2100. What size is it?
by THE FRENCHTOWN FLYER
Tue Jun 11, 2019 5:37 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 240 valve size?
Replies: 2
Views: 103

Re: 240 valve size?

Any time you go with an intake manifold upgrade - and cam - I recommend increasing the valve size(s) to leverage the gains possible with the manifold or cam alone.
by THE FRENCHTOWN FLYER
Sun Jun 09, 2019 10:26 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Vacuum Secondaries
Replies: 23
Views: 573

Re: Vacuum Secondaries

SteveP wrote:The CFM requirement of the 300 is low... maybe 175 CFM at 2000 RPM.

156.25 @ 90% VE


I doubt that the 300 has a vol eff of 90% anywhere in the speed range of the engine. Maybe 80% tops. So about 139 cfm?
by THE FRENCHTOWN FLYER
Sat Jun 08, 2019 10:28 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Vacuum Secondaries
Replies: 23
Views: 573

Re: Vacuum Secondaries

I like mechanical secondaries. I like 1:1 linkage ratio carbs on a road race, circle track or other engine that is driven aggressively at mid to higher RPM's. The CFM requirement of the 300 is low... maybe 175 CFM at 2000 RPM. I doubt that more carb / more carb opening is going to add anything. But...
by THE FRENCHTOWN FLYER
Thu Jun 06, 2019 7:10 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Which mini starter for an old 300.
Replies: 8
Views: 218

Re: Which mini starter for an old 300.

Also, the mini starters from small block (302,351) V8s will work. Auto / auto or std / std as mentioned above.
by THE FRENCHTOWN FLYER
Tue Jun 04, 2019 1:24 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Power Valve Question
Replies: 9
Views: 175

Re: Power Valve Question

I think a more realistic cruise A/F ratio is around 15 - 15.5 for carbed, around 14.7 or a little leaner for EFI.
by THE FRENCHTOWN FLYER
Mon Jun 03, 2019 10:12 am
Forum: 240-300 "Big Block" Six Performance
Topic: Is this hp/ torque curve correct?
Replies: 4
Views: 266

Re: Is this hp/ torque curve correct?

To further clarify, Prior to switching to SAE Net rating there were three sets of dyno numbers generated. We used to call them "A" Curve, "B" Curve, and "C" Curve. The "A" Curve represented the maximum power available from that power plant - blueprinted to spe...
by THE FRENCHTOWN FLYER
Mon Jun 03, 2019 9:53 am
Forum: 240-300 "Big Block" Six Performance
Topic: Is this hp/ torque curve correct?
Replies: 4
Views: 266

Re: Is this hp/ torque curve correct?

This shows peak hp at 4000 rpm. Is that correct? Those are SAE Gross numbers. Without exhaust system, air inlet system losses or front end accessory drag loads (except water pump). The auto industry switched to SAE Net ratings around 1972 which represent the power "as installed in a vehicle&qu...
by THE FRENCHTOWN FLYER
Fri May 31, 2019 10:36 pm
Forum: 240-300 "Big Block" Six Performance
Topic: C5AE rods
Replies: 54
Views: 1649

Re: C5AE rods

You are probably going to have to grind down the underside of the front and rear side cover hold-down bolt bosses on the block to clear the tie bars. You may even have to grind a divot in the middle of the tie bars to get them in. Be sure the cam lobes are not in the overlap cycle or you may not hav...
by THE FRENCHTOWN FLYER
Fri May 31, 2019 9:50 am
Forum: 240-300 "Big Block" Six Performance
Topic: Improvements To My 300 Motor
Replies: 23
Views: 784

Re: Improvements To My 300 Motor

progressive 2 bsrrel. doesn't weber have one? The Holley / Weber 5200 and the DGAS style were used on engines in the 1.6 to 2.3 Liter range. I think they will function but still be a bit small and I question whether they will deliver any performance improvement on a 4.9 L engine. old 28, I don't th...
by THE FRENCHTOWN FLYER
Thu May 30, 2019 8:35 pm
Forum: 240-300 "Big Block" Six Performance
Topic: So I have a plan but now im Second guessing myself.
Replies: 40
Views: 733

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

I have a current build going on that I am going to use stamped stock rocker arms. The reason for that is I am running a back-to-back experiment on replacing a 240 with a 300 in the same vehicle and I want to keep the engines similar in build-up. I plan to contour dress the valve tip ends with a fine...
by THE FRENCHTOWN FLYER
Thu May 30, 2019 8:28 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Got the motor out....
Replies: 32
Views: 761

Re: Got the motor out....

Prior to '87 they all had carbs. In '87 they switched to EFI with a change to a fast-burn head and other stuff. As far as durability goes there is no singular year short block that is best. Nearly all carbed engines had pistons that were prone to cracking. Nearly all EFI engines had heads that were ...
by THE FRENCHTOWN FLYER
Thu May 30, 2019 8:19 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Improvements To My 300 Motor
Replies: 23
Views: 784

Re: Improvements To My 300 Motor

TFTF --- Are the 2150 hard to find in the 1.08 size? Is there another Autolite size two barrel that works well with a very mild 300? 1.08 2150 are quite common - the 302 / 5.0 L V8s used them for many years. The 2150 style (as opposed to the 2100 - and, for that matter, the Holley 2Vs) has part thr...
by THE FRENCHTOWN FLYER
Thu May 30, 2019 11:18 am
Forum: 240-300 "Big Block" Six Performance
Topic: Improvements To My 300 Motor
Replies: 23
Views: 784

Re: Improvements To My 300 Motor

Mdixon300f100 wrote:Is the 2150 a progressive 2v?

No. I can't think of a progressive deuce that would be big enough for a 300. Except for maybe the rare Holley 4412 style L 80120 350 cfm progressive 2V. The 5200 style would be too small.
by THE FRENCHTOWN FLYER
Thu May 30, 2019 7:01 am
Forum: 240-300 "Big Block" Six Performance
Topic: Improvements To My 300 Motor
Replies: 23
Views: 784

Re: Improvements To My 300 Motor

...the Holley 2V is a gas hog. I would like to stay away from the cost of a C intake. Maybe I would be better off using the hogged out 300 log intake & installing a Autolite 1.08 two barrel. I know it would get better fuel mileage than the Holley. That was what I was going to suggest - try a 21...
by THE FRENCHTOWN FLYER
Wed May 29, 2019 8:45 am
Forum: 240-300 "Big Block" Six Performance
Topic: TECH TIP - STORAGE
Replies: 8
Views: 336

Re: TECH TIP - STORAGE

... I do not know nor do I wish to know what thoughts might have been going through his head as he witnessed this very low tech, hillbilly taking a hammer to precision parts. ... Your experience reminds me. I gotta tell this story: A supervisor of mine told me early on in his career he had to take ...
by THE FRENCHTOWN FLYER
Tue May 28, 2019 11:03 pm
Forum: 240-300 "Big Block" Six Performance
Topic: So I have a plan but now im Second guessing myself.
Replies: 40
Views: 733

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

I would knock back the total timing to 33 - 34 degrees.
Sure, the 1.76 rockers will work with your combo. Be sure to check for coil bind and sufficient clearances in all the usual places.
by THE FRENCHTOWN FLYER
Tue May 28, 2019 4:45 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Tractor Puller
Replies: 157
Views: 15217

Re: Tractor Puller

Does that one get a six?
by THE FRENCHTOWN FLYER
Sun May 26, 2019 10:07 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Attic Anglia - My Latest Project
Replies: 90
Views: 14045

Re: Attic Anglia - My Latest Project

Today the guides got prepped. First, ream with a piloted reamer. This will make the hole round and on center. Next, since I'm a little OCD I honed the guide, to establish the final size and to get the proper surface finish on the inside of the guide with an oil-holding cross hatch. For a street moto...
by THE FRENCHTOWN FLYER
Sun May 26, 2019 9:47 pm
Forum: 240-300 "Big Block" Six Performance
Topic: TECH TIP - STORAGE
Replies: 8
Views: 336

TECH TIP - STORAGE

if you have a block or head you want to store long term see if your local marina has some left-over scrap boat shrink wrap. They often trim off table-cloth sized pieces when covering boats. Wrap head, shrink with a heat gun or torch and stuff will stay clean until ready for use. https://img.photobuc...
by THE FRENCHTOWN FLYER
Sun May 26, 2019 6:34 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Offenhauser VS Clifford
Replies: 15
Views: 724

Re: Offenhauser VS Clifford

The following upgrades will not compromise the reliability of your engine:

Low restriction exhaust system
RV or towing cam
EFI dual exhaust
Metal cam gear upgrade
Clutch fan
by THE FRENCHTOWN FLYER
Sun May 26, 2019 8:38 am
Forum: 240-300 "Big Block" Six Performance
Topic: 302 to 300 engine swap questions
Replies: 8
Views: 418

Re: 302 to 300 engine swap questions

If the RV has an auto trans then either starter will work. I highly recommend the late model Hi-torque mini starter.
by THE FRENCHTOWN FLYER
Sat May 25, 2019 12:37 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Offenhauser VS Clifford
Replies: 15
Views: 724

Re: Offenhauser VS Clifford

That setup was actually perfected by my friend Tom Langdon, a six cylinder wizard in his own right. Give those folks a call and they can help you.

http://www.langdonsstovebolt.com/
by THE FRENCHTOWN FLYER
Sat May 25, 2019 7:58 am
Forum: 240-300 "Big Block" Six Performance
Topic: Offenhauser VS Clifford
Replies: 15
Views: 724

Re: Offenhauser VS Clifford

thoughts on how the Clifford 2 x 2bbl would work in a more truck based application? I managed to grab the setup + headers with the thought to put it on my '66 F-250 (along with a number of other lesser improvements). truck isn't looking to be a racer spending more time over the road/stoplight than ...
by THE FRENCHTOWN FLYER
Fri May 24, 2019 4:33 pm
Forum: 240-300 "Big Block" Six Performance
Topic: TECH TIPS #39, #40 & #41
Replies: 8
Views: 408

Re: TECH TIPS #39, #40 & #41

Thanks pmuller - that makes sense.

Thanks Max_Effort. I've made a similar tool using screw type calipers by putting graduations on the thumb wheel. But the catalog pic looked like it was a one-piece deal.
by THE FRENCHTOWN FLYER
Fri May 24, 2019 1:10 pm
Forum: 240-300 "Big Block" Six Performance
Topic: TECH TIPS #39, #40 & #41
Replies: 8
Views: 408

Re: TECH TIPS #39, #40 & #41

Max_Effort wrote:I'm using a router speed control, but I was recently looking at the "variacs" as you use.


I'd like somebody to explain to me how it puts out up to 140 VAC if the input is 110 VAC? Perpetual motion?
by THE FRENCHTOWN FLYER
Fri May 24, 2019 9:59 am
Forum: 240-300 "Big Block" Six Performance
Topic: TECH TIPS #39, #40 & #41
Replies: 8
Views: 408

Re: TECH TIPS #39, #40 & #41

Thanks for that useful info Max_Effort.

I looked through their catalog. The black "thickness checker" tool that looks kinda like a micrometer - do you know how that is supposed to work? The catalog does not give a description. I'm confused.
by THE FRENCHTOWN FLYER
Fri May 24, 2019 12:15 am
Forum: 240-300 "Big Block" Six Performance
Topic: Attic Anglia - My Latest Project
Replies: 90
Views: 14045

Re: Attic Anglia - My Latest Project

The block is back from the machine shop w/ a new bore and hone. The pistons were installed on the rods. I took the head in to get de-greased and de-rusted. The guides were in bad shape so I installed Bronze Wall guides. Then I cleaned up the ports and the combustion chambers. I did the final clean-u...
by THE FRENCHTOWN FLYER
Fri May 24, 2019 12:07 am
Forum: 240-300 "Big Block" Six Performance
Topic: Offenhauser VS Clifford
Replies: 15
Views: 724

Re: Offenhauser VS Clifford

On a drag race build I actually prefer the Cliffy 2 x 4 intake with two 2Vs.
by THE FRENCHTOWN FLYER
Fri May 24, 2019 12:03 am
Forum: 240-300 "Big Block" Six Performance
Topic: TECH TIPS #39, #40 & #41
Replies: 8
Views: 408

TECH TIPS #39, #40 & #41

Here are a few additional ideas you may like: I have a die grinder setup that works well for prepping heads. It consists of three items: A long snout die grinder Long carbide fluted cutters of various shapes and A variable speed reducer. The variable speed reducer makes it possible to achieve dentis...
by THE FRENCHTOWN FLYER
Thu May 23, 2019 4:59 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Offenhauser VS Clifford
Replies: 15
Views: 724

Re: Offenhauser VS Clifford

I've never seen a dyno comparison of the C vs Cliffy. I guess the performance difference is nil. I also think water heat is not needed when using an aluminum manifold of any type unless you plan to drive in very cold climates and/or you are looking for the Nth degree of fuel economy. I've had vapor ...
by THE FRENCHTOWN FLYER
Thu May 23, 2019 1:06 pm
Forum: 240-300 "Big Block" Six Performance
Topic: catalog of conceptual build plans for the b.b.ford sticky
Replies: 39
Views: 3624

Re: catalog of conceptual build plans for the b.b.ford sticky

The garter spring does not rotate per se. The partially squashed spring coils are laid over at an angle. When pressure is exerted on the top of the retainer the spring compresses and then releases, moving the top side of the retainer in relation to the bottom side, slightly rotating the valve each c...
by THE FRENCHTOWN FLYER
Thu May 23, 2019 9:16 am
Forum: 240-300 "Big Block" Six Performance
Topic: Got the motor out....
Replies: 32
Views: 761

Re: Got the motor out....

...this motor ran smooth as silk, other than ring issues, which I now assume to be due to a very poor ring job. The head job didn’t help a bit either. But it ran great. I’ve got a strong feeling I’m going to be blown away when I finish this truck. It’s been a heck of a ride so far. ... Yup. The hon...
by THE FRENCHTOWN FLYER
Tue May 21, 2019 4:54 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Got the motor out....
Replies: 32
Views: 761

Re: Got the motor out....

Judging by the looks of the crosshatch pattern it looks like somebody re-ringed it and used a dingle-berry ball hone. The pattern does not look factory. Fine tooth metal gears were used for a number of years in production and should be still available; a good upgrade from phenolic and anything that ...
by THE FRENCHTOWN FLYER
Tue May 21, 2019 9:03 am
Forum: 240-300 "Big Block" Six Performance
Topic: catalog of conceptual build plans for the b.b.ford sticky
Replies: 39
Views: 3624

Re: catalog of conceptual build plans for the b.b.ford sticky

Yes. It may help if you take one apart to see its guts. Grind the crimp away on the underside of the outer shell and the rotator will come apart in three pieces. You'll see a circular garter spring that looks like it had been squashed by an elephant standing on it. That is the ratchet spring that ma...
by THE FRENCHTOWN FLYER
Mon May 20, 2019 10:41 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 1968 Ford F250 with 4.9 ltr six
Replies: 2
Views: 198

Re: 1968 Ford F250 with 4.9 ltr six

Does it still have the EGR system ion it. EGR can cause surging issues at light loads. A cold start PVS in the vacuum line combined with a restrictor in the vacuum line to the EGR valve (try .025") will cure it. You may need to add a SDV to the line too. That bag of tricks will make it run bett...
by THE FRENCHTOWN FLYER
Mon May 20, 2019 7:57 am
Forum: 240-300 "Big Block" Six Performance
Topic: Best Spark Plugs for Turbo Application
Replies: 2
Views: 212

Re: Best Spark Plugs for Turbo Application

I agree that higher combustion pressures generate higher chamber temperatures and would probably dictate a colder plug. I think starting with a heat range that is two steps colder would be a safe strategy. But since you will not always be operating under boost you will have to experiment to find out...
by THE FRENCHTOWN FLYER
Sat May 18, 2019 8:26 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Roadtrip thoughts: Loss of performance after modifications
Replies: 15
Views: 649

Re: Roadtrip thoughts: Loss of performance after modifications

The additional degrees that the greater rocker arm lift holds the valve open is minuscule. Put the original rocker arms back on and see if the problem goes away. That will tell you if the rocker arm change was the problem. Do not change anything else. I suspect it is not the rocker change but someth...
by THE FRENCHTOWN FLYER
Sat May 18, 2019 8:21 pm
Forum: 240-300 "Big Block" Six Performance
Topic: catalog of conceptual build plans for the b.b.ford sticky
Replies: 39
Views: 3624

Re: catalog of conceptual build plans for the b.b.ford sticky

Also did away with the exhaust valve rotators. Some may question the idea of doing away with the exhaust rotators. They are not a reliable high RPM piece -the directional garter spring tends to shatter and pieces migrate through the engine. Tearing down a well used 300 head recently I noticed somet...
by THE FRENCHTOWN FLYER
Fri May 17, 2019 6:36 pm
Forum: 240-300 "Big Block" Six Performance
Topic: On a road trip, tuning advice needed Carter YF
Replies: 10
Views: 405

Re: On a road trip, tuning advice needed Carter YF

If you think its too lean you can increase the main jet. Or you can raise the metering rod to enrich the part throttle mode. Do this by turning the hex screw on the top off the metering rod clockwise in quarter-turn increments. You have to remove the carb top to do this. Not sure this will cure your...
by THE FRENCHTOWN FLYER
Mon May 13, 2019 6:28 am
Forum: 240-300 "Big Block" Six Performance
Topic: Cool video of custom head
Replies: 1
Views: 265

Re: Cool video of custom head

Several were built like that in the 60s and 70s. They were supplanted by the more technologically advanced Alan Johnson billet aluminum head which was more reliable than a welded up piece and available from Ford Racing (SVO at the time).
by THE FRENCHTOWN FLYER
Sat May 11, 2019 7:33 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Difference between industrial and truck engine
Replies: 2
Views: 283

Re: Difference between industrial and truck engine

It would probably work fine. It has lower compression ratio pistons - maybe 8.0:1 I think.
Make sure of the induction system. All kinds of manifolds were used on those things - natural gas, propane , gas with a governor, etc. You may have to upgrade. Likewise the exhaust may need upgrading. Good luck.
by THE FRENCHTOWN FLYER
Fri May 10, 2019 9:47 pm
Forum: 240-300 "Big Block" Six Performance
Topic: torque converter stall speed ?
Replies: 15
Views: 535

Re: torque converter stall speed ?

A 2500 RPM stall speed in conjunction w/ 3.50 gears and 31" tires works well in my Willys. I used a 10" converter originally for a 351C Cobra Jet.
by THE FRENCHTOWN FLYER
Thu May 09, 2019 12:22 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 300 torque build 85 Bronco
Replies: 313
Views: 15854

Re: 300 torque build 85 Bronco

Stunning shots.
You guys got chutzpah going out there far from civilization with little tech support.

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