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Search found 233 matches

by sandboxer
Sun Sep 08, 2019 9:24 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Progress on the '56. Help decide on this motor!
Replies: 66
Views: 1683

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

I plan to run some type of efi. But I have NO experience with it. I would LOVE to run FAST, FiTech, or Sniper setup. It keeps it looking old school and simple. None of those will work with TFI nor do they have a magnetic plug and play distributor for a 300 six. So I have to figure that out as I wou...
by sandboxer
Mon Aug 05, 2019 4:22 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Casting porosity
Replies: 3
Views: 266

Re: Casting porosity

That’s great advice.
Thank you.
by sandboxer
Sat Aug 03, 2019 9:51 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Casting porosity
Replies: 3
Views: 266

Casting porosity

Found this on the top of the head. Any ideas of the casting process that might indicate porosity further in?
60F0D1FC-18F7-406F-AA1A-5C74D19845EE.jpeg
69981B4B-4DC4-420C-ABD4-98353835B99A.jpeg
by sandboxer
Sat Aug 03, 2019 12:52 am
Forum: 240-300 "Big Block" Six Performance
Topic: Fresh Rebuilt 240
Replies: 120
Views: 5562

Re: Fresh Rebuilt 240

Decided to start carving. No water yet:)
3A56F377-9A3B-40E4-997D-5E947BCF38BD.jpeg
by sandboxer
Mon Jul 22, 2019 1:07 am
Forum: 240-300 "Big Block" Six Performance
Topic: Vacuum Secondaries
Replies: 35
Views: 2060

Re: Vacuum Secondaries

1964f100240 wrote:I have had good luck with 650dp 750dp and mechanical fuel injection but i have to say standalone EFI is the way to go I run a 240 12.5 255@.50 .650 lift roller on e85r I can drive it on the street now.

Not to divert the subject, but can you give us the skinny on the cam and lifters?
Thanks
by sandboxer
Wed Jul 17, 2019 11:51 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Turboing a stock 300, how to make it last?
Replies: 74
Views: 4056

Re: Turboing a stock 300, how to make it last?

Thanks gents.
Yikes, I didn’t realize it was that severe. Good to know.
by sandboxer
Wed Jul 17, 2019 6:33 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Turboing a stock 300, how to make it last?
Replies: 74
Views: 4056

Re: Turboing a stock 300, how to make it last?

A few observations: I noticed the piston dish has a circular depression in it. Are you sure this short block isn't from an industrial application - with lower CR than a truck? An industrial short block might have chrome rings which would explain the high chromium content in the oil analysis. Second...
by sandboxer
Tue Jul 16, 2019 12:40 am
Forum: 240-300 "Big Block" Six Performance
Topic: Mechanical Fuel pump output
Replies: 5
Views: 350

Re: Mechanical Fuel pump output

I believe the 28 or 29 GPH is factory. I'm running a Carter 35 GPH mechanical pump, through an aeromotive returnless FPR set at 6.5 psi. Have more than enough fuel for my 250ish HP 300. My pump is the one with the canister facing upwards. From the summit racing specs, my pump is for all the falcon ...
by sandboxer
Mon Jul 15, 2019 11:47 am
Forum: 240-300 "Big Block" Six Performance
Topic: Mechanical Fuel pump output
Replies: 5
Views: 350

Re: Mechanical Fuel pump output

Thank you xcstasy for the epic answer and thread, which I’ve bookmarked. It’s always humbling when the experts on the forum chime in.
Cheers
by sandboxer
Mon Jul 15, 2019 9:44 am
Forum: 240-300 "Big Block" Six Performance
Topic: Mechanical Fuel pump output
Replies: 5
Views: 350

Mechanical Fuel pump output

Does anyone know how much hp the stock mechanical fuel pump can support?
Thanks
by sandboxer
Sun Jul 14, 2019 11:21 am
Forum: 240-300 "Big Block" Six Performance
Topic: slanting a 300
Replies: 12
Views: 671

Re: slanting a 300

A local gentleman successfully campaigned a slanted 300 powered sprint car in the ‘70s, and has been building and machining 300s ever since. I think it involved a home built dry sump pan and Hilborn injection. He’s currently machining and balancing my 300 and I wouldn’t want anyone else doing the wo...
by sandboxer
Fri Jul 12, 2019 10:16 am
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 467
Views: 58061

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

Its Gramps travel weary since my last post (seems like months ago with 5K plus in road miles to my credit). Slow but sure is my best update on the 3-head projects. Yes I could start banging out heads fairly soon, but I want to give you the utmost in both JR and SR versions. You deserve something un...
by sandboxer
Sun Jun 30, 2019 7:28 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Results, Chevy rockers, EFI manifolds, clutch fan, new Carter YF
Replies: 7
Views: 765

Re: Results, Chevy rockers, EFI manifolds, clutch fan, new Carter YF

pmuller9 wrote:Thanks for the report!
We all appreciate when someone reports results so we can find out what worked and what didn't work as well.
The feedback is what adds to the wealth of this forum.
Great Job!

DITTO
We all sure benefit
by sandboxer
Tue Jun 25, 2019 4:59 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 240 valve size?
Replies: 29
Views: 1455

Re: 240 valve size?

I had to go back through and refresh my brain on what is actually happening with the camshaft in relation to crankshaft, and it all makes sense now. When it comes to cam lift and subsequently valve lift, I know that cam lift will be 0.448", which when using a 1.75:1 rocker equates to 0.784&quo...
by sandboxer
Tue Jun 18, 2019 10:30 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Fresh Rebuilt 240
Replies: 120
Views: 5562

Re: Fresh Rebuilt 240

B4036696-B28D-4DD3-A164-88FB37250F1A.jpeg All of the casting flash has been removed and the hard edges smoothed out. Given the odd counterweight shapes, I didn’t feel quite right putting this in the lathe and trimming them down. Can someone advise me whether I should chuck it up and spin a bit off,...
by sandboxer
Sun Jun 16, 2019 9:57 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Fresh Rebuilt 240
Replies: 120
Views: 5562

Re: Fresh Rebuilt 240

Rough carving my crank before polishing and balancing. Leading and trailing edges...
6C240883-F2CD-4FAF-808C-4A24C85AE994.jpeg
E5770617-CB8B-4DB7-A74E-4DAFEF34D340.jpeg
by sandboxer
Fri Jun 14, 2019 10:16 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Vacuum Secondaries
Replies: 35
Views: 2060

Re: Vacuum Secondaries

I have a Holley 1968 GT390 4speed 600 cfm vacuum secondary carb that needs a rebuild. I’m also picking up a Holley 650 double pumper 4777c tomorrow that is missing 2 idle screws for cheap... I’ll see what kind of budget hot-rodding karma I can channel to see this work out. If not, it’s a new Quick F...
by sandboxer
Wed Jun 12, 2019 1:02 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Vacuum Secondaries
Replies: 35
Views: 2060

Re: Vacuum Secondaries

Ok:)
Convinced.
Thanks!
by sandboxer
Wed Jun 12, 2019 11:04 am
Forum: 240-300 "Big Block" Six Performance
Topic: Vacuum Secondaries
Replies: 35
Views: 2060

Re: Vacuum Secondaries

Anyone have experience with a 450 double pumper? I need to decide on my induction soon, so this thread is of the highest importance at this point for me. 10:1 Schneider 142F 300 rods I have two Carter BBD (285 cfm) carbs that are an option to a 4 barrel mechanical. The 450 double pumper is a distin...
by sandboxer
Sun Jun 09, 2019 9:44 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Vacuum Secondaries
Replies: 35
Views: 2060

Re: Vacuum Secondaries

Anyone have experience with a 450 double pumper? I need to decide on my induction soon, so this thread is of the highest importance at this point for me. 10:1 Schneider 142F 300 rods I have two Carter BBD (285 cfm) carbs that are an option to a 4 barrel mechanical. The 450 double pumper is a distinc...
by sandboxer
Fri Jun 07, 2019 8:02 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Pioneer Rod bolts
Replies: 5
Views: 430

Re: Pioneer Rod bolts

CNC-Dude wrote:There are different FE rod bolts. One has the football shaped head, the other is the square head. Just make sure of the style you need for your 300 rods.

Noted and mission accomplished.
Thanks
by sandboxer
Fri Jun 07, 2019 2:42 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Pioneer Rod bolts
Replies: 5
Views: 430

Re: Pioneer Rod bolts

Thanks for the feedback. The local speed shop didn’t have the 300 rod bolts in stock, so the Pioneers were available elsewhere.
Called ARP though and cross referenced FE bolts:
Part 155-6002
Luckily the speed shop has those. Picking them up today.
Cheers!
by sandboxer
Fri Jun 07, 2019 12:07 am
Forum: 240-300 "Big Block" Six Performance
Topic: Pioneer Rod bolts
Replies: 5
Views: 430

Pioneer Rod bolts

Anyone use these or know of any unhappy outcomes?
Thanks
by sandboxer
Mon Jun 03, 2019 12:55 am
Forum: 240-300 "Big Block" Six Performance
Topic: Tractor Puller
Replies: 189
Views: 20158

Re: Tractor Puller

Mechanical roller cams require much more spring than a solid flat tappet cam because of the high ramp rate of the roller cam. One of our BBC roller cams is 300 lbs closed and 800 lbs at .700” lift. The Comp 7228 conical spring will give you around 400 lbs open at .600” lift which should keep the li...
by sandboxer
Sun Jun 02, 2019 8:18 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Tractor Puller
Replies: 189
Views: 20158

Re: Tractor Puller

Mechanical roller cams require much more spring than a solid flat tappet cam because of the high ramp rate of the roller cam. One of our BBC roller cams is 300 lbs closed and 800 lbs at .700” lift. The Comp 7228 conical spring will give you around 400 lbs open at .600” lift which should keep the li...
by sandboxer
Thu May 30, 2019 6:03 pm
Forum: 240-300 "Big Block" Six Performance
Topic: So I have a plan but now im Second guessing myself.
Replies: 120
Views: 4877

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

Talked to Kevin at Schneider yesterday and was told that the 142F would fall on its face at 5500 because of the poor breathing of the head. That can is rated to 6500. As well, Jerry at Schneider today confirmed that they have all the requisite springs.
by sandboxer
Wed May 29, 2019 9:48 am
Forum: 240-300 "Big Block" Six Performance
Topic: TECH TIP - STORAGE
Replies: 8
Views: 591

Re: TECH TIP - STORAGE

Linseed oil + newspaper + big plastic bag. PLEASE DON’T! Linseed oil heats as it cures and will cause rags and paper to spontaneously combust. Many a garage/shop has been lost to oil soaked rags. I use linseed oil in my line of work and any cloth or paper that comes in contact with linseed oil goes...
by sandboxer
Mon May 27, 2019 9:05 am
Forum: 240-300 "Big Block" Six Performance
Topic: 300 lacking HP
Replies: 43
Views: 2308

Re: 300 lacking HP

Just a few guesses... It is my understanding that the lower runners have a weaker signal than the upper runners, so you might have to jet them differently for optimal power. You also might be getting fuel separation in the upper runners as well because of the abrupt turn. The spacer not only helps t...
by sandboxer
Sat May 25, 2019 11:10 am
Forum: 240-300 "Big Block" Six Performance
Topic: Required reading before building a 300.
Replies: 9
Views: 851

Re: Required reading before building a 300.

Ditto on Vizard.
This one is a good all around informative read.
E1E6AA56-2053-459A-8753-A32233597C7A.jpeg
by sandboxer
Sat May 25, 2019 11:02 am
Forum: 240-300 "Big Block" Six Performance
Topic: Roadtrip thoughts: Loss of performance after modifications
Replies: 16
Views: 1283

Re: Roadtrip thoughts: Loss of performance after modifications

Emergency brake was stuck. A bit of a drag...?
by sandboxer
Thu May 23, 2019 4:28 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Picked up my block and pistons from machine shop.
Replies: 47
Views: 2847

Re: Picked up my block and pistons from machine shop.

They actually didn’t recommend any type. They just quoted a price. I should have asked....

Thanks for your input. I’m sure it’s saving everyone a lot of grief, especially me:)
by sandboxer
Thu May 23, 2019 1:24 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Picked up my block and pistons from machine shop.
Replies: 47
Views: 2847

Re: Picked up my block and pistons from machine shop.

Maybe I missed something...
Talked with Schneider about a complete kit yesterday for the 142f, including springs. Theirs don’t work with the 300?
by sandboxer
Wed May 22, 2019 3:35 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Required reading before building a 300.
Replies: 9
Views: 851

Re: Required reading before building a 300.

I may buy that book. It's a little pricey so I'll wait to see what others suggest though. It is almost 400 pages of design information with detailed discussions of each part including parameters and limits. Some math, Detailed assembly instructions, glossary of terms and helpful tables ect... With ...
by sandboxer
Tue May 21, 2019 3:48 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Fresh Rebuilt 240
Replies: 120
Views: 5562

Re: Fresh Rebuilt 240

297973F8-8EA5-4270-9C51-0CA841865A3C.jpeg
5E77CB9C-C878-4CEF-B006-0724CFD56760.jpeg

...add a little flare...
by sandboxer
Tue May 21, 2019 11:56 am
Forum: 240-300 "Big Block" Six Performance
Topic: Fresh Rebuilt 240
Replies: 120
Views: 5562

Re: Fresh Rebuilt 240

54-4x4 wrote:You are doing a fine job.I like to do this kind of stuff too.

Thank you! It’s a good thing I didn’t post pics of my epic screw ups:)
Please share your adventure pics.
by sandboxer
Mon May 20, 2019 10:51 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Got the motor out....
Replies: 32
Views: 1454

Re: Got the motor out....

Any idea why 4 and 6 were so lean? 1 looks wet...
by sandboxer
Mon May 20, 2019 10:46 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Fresh Rebuilt 240
Replies: 120
Views: 5562

Re: Fresh Rebuilt 240

Stitching up the runners
E99BEE09-F85C-413A-B6E5-249B3647A617.jpeg
6AEEFCC6-EF49-4FF2-9A60-A346DF206440.jpeg
by sandboxer
Sun May 19, 2019 12:01 am
Forum: 240-300 "Big Block" Six Performance
Topic: forged 300 industrial stock pistons
Replies: 3
Views: 448

Re: forged 300 industrial stock pistons

I just posted pics of my TRW L2444.
888 grams with the pin, 717 without.
by sandboxer
Sat May 18, 2019 4:42 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Fresh Rebuilt 240
Replies: 120
Views: 5562

Re: Fresh Rebuilt 240

A little update Intake runners taking shape. Debating the use of TRW forged pistons for a 300. These are beautiful but heavy. Obviously not for the 240, but thinking about my .030 rebuilt 240 and putting these in with a 300 crank... .060 offset. Compared with a TRW cast piston, it’s quite robust. 31...
by sandboxer
Sat May 04, 2019 10:10 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Fresh Rebuilt 240
Replies: 120
Views: 5562

Re: Fresh Rebuilt 240

54-4x4 wrote:That looks good what you are doing.

THE FRENCHTOWN FLYER wrote:NICE


Thanks gentlemen.
Here are a few shots from today’s work.
8AEC6442-138F-4BB4-91B6-B71029B04C14.jpeg


A shot with my intake runner and one with a 1.75” tube ready to be bent.
CD019B3A-0554-4070-8D2F-37406C50E56B.jpeg
by sandboxer
Thu Apr 25, 2019 1:03 am
Forum: 240-300 "Big Block" Six Performance
Topic: Fresh Rebuilt 240
Replies: 120
Views: 5562

Re: Fresh Rebuilt 240

My header transition effort. A few more attempts and it might start to clean up a bit... I’m planning on sliding the tube over top and grinding out the inside after weld up. 5D0A5374-AA68-4C1D-B5B4-E7E579E30988.jpeg 209C609F-BD62-4798-88EC-ED087FD43D84.jpeg 21F20CAF-7E03-4579-B7DB-75E078911C00.jpeg ...
by sandboxer
Sat Apr 20, 2019 1:09 pm
Forum: 240-300 "Big Block" Six Performance
Topic: What's wrong with this picture...
Replies: 9
Views: 734

Re: What's wrong with this picture...

Very valuable information!
Thank you for sharing.
by sandboxer
Fri Apr 19, 2019 8:27 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Fresh Rebuilt 240
Replies: 120
Views: 5562

Re: Fresh Rebuilt 240

54-4x4 wrote:You are doing a very nice job on your pieces.I will be tagging along to learn something here.

Thank you. It’s definitely quite a learning curve for me. I’ve fabricated before but never to make horsepower, so I’ll tag along too:)
by sandboxer
Fri Apr 19, 2019 3:12 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Tractor Puller
Replies: 189
Views: 20158

Re: Tractor Puller

Sorry for your loss Lunatic Fringe. I hope you make it back to the 300 someday soon. Good luck with the season.
by sandboxer
Thu Apr 18, 2019 10:43 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Fresh Rebuilt 240
Replies: 120
Views: 5562

Re: Fresh Rebuilt 240

Nice form and flanges! Will you use stainless steel tubing? Thanks! The flanges were made by Lunatic Fringe. I’m going to use 1 3/4” .065 mild to start. It has a 1 5/8” opening, which will meet my needs. I’m going to try this header on the dyno against the EFI, and hopefully it’ll come out better. ...
by sandboxer
Thu Apr 18, 2019 9:58 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Fresh Rebuilt 240
Replies: 120
Views: 5562

Re: Fresh Rebuilt 240

A few pics: The exhaust form is protruding about 1” more than needed because I’ll weld onto the flange with a slight anti reversion lip so the width and height will be slightly oversized to the port opening. AEECEC48-9EBF-451E-9CF0-38D7AEA12E11.jpeg FC564CCD-619B-4435-BF7C-CA68A4837CA0.jpeg 17FFC17D...
by sandboxer
Thu Apr 18, 2019 8:26 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Fresh Rebuilt 240
Replies: 120
Views: 5562

Re: Fresh Rebuilt 240

Thank you for the feedback FF. I built a hammer form yesterday so I tried to make sure that the flow out wasn’t impeded in any way. Today I checked the outlet on the EFI header and it matches the exhaust port perfectly (1500sq mm). Ford’s 3 into 1 has no pinch spots at all. I checked the outlet on t...
by sandboxer
Wed Apr 17, 2019 11:48 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Fresh Rebuilt 240
Replies: 120
Views: 5562

Re: Fresh Rebuilt 240

I have another dilemma.
The exhaust ports measure 1500 sq. mm
- 1 1/2” header ID equals 1134 sq. mm
- 1 5/8” header ID equals 1334 sq. mm

Either way, a 1 3/4” header tube will barely equal the exhaust port size. Everything smaller is a huge step down.

Thoughts?
by sandboxer
Wed Apr 17, 2019 11:06 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Fresh Rebuilt 240
Replies: 120
Views: 5562

Re: Fresh Rebuilt 240

Thanks to both of you for that thread.
I remember reading it thoroughly as it unfolded but obviously my retention abilities need work. That is an epic thread. Very helpful.