Search found 79 matches

by sandboxer
Fri Nov 16, 2018 7:44 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 311
Views: 22169

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

Hi Gents I am interested in all three heads, but can only buy one to start. I would need to know the specs of the SR. head before being able to decide. I know development funds are scarce, but I can’t rightly fork out for a Jr when the Sr is what I need. Any idea of a timeframe for the Sr testing? T...
by sandboxer
Sat Oct 06, 2018 9:30 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Polished intake
Replies: 28
Views: 908

Re: Polished intake

Yup
by sandboxer
Fri Oct 05, 2018 9:32 am
Forum: 240-300 "Big Block" Six Performance
Topic: Custom 4bbl intaie
Replies: 7
Views: 342

Re: Custom 4bbl intaie

Nice!
by sandboxer
Mon Oct 01, 2018 12:34 am
Forum: 240-300 "Big Block" Six Performance
Topic: Searching for Builds / Combos
Replies: 41
Views: 1642

Re: Searching for Builds / Combos

What hp/tq numbers did you come up with, pm? Please let us know if your client gets some dyno numbers.
Thanks
by sandboxer
Thu Sep 27, 2018 11:22 am
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 311
Views: 22169

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

Nothing wrong with the old fashioned way. We humans still need to prove our worth against the machine, before we become obsolete. Awesome.
by sandboxer
Mon Sep 24, 2018 12:10 am
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 311
Views: 22169

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

That is the most informative sectioning I’ve seen. There seems to be quite a bit of available material in the sides to open things up a bit. Will you cnc port your runners or template and carve by hand?
Keep up the great work.
by sandboxer
Thu Sep 13, 2018 12:09 am
Forum: 240-300 "Big Block" Six Performance
Topic: 300 Piston skirts
Replies: 12
Views: 419

Re: 300 Piston skirts

Thanks LF
I’ll let you know how I make out.
by sandboxer
Wed Sep 12, 2018 12:50 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 300 Piston skirts
Replies: 12
Views: 419

Re: 300 Piston skirts

Thanks Gentlemen I think some new pistons and rings are in order. I plan to lighten the crank by mounting the block upside down in the Bridgeport and spinning the crank under the cutterhead to get a hopefully consistent cut... I think I’ll take my “finished” work to a friend with a balancer, though,...
by sandboxer
Wed Sep 12, 2018 10:46 am
Forum: 240-300 "Big Block" Six Performance
Topic: 300 Piston skirts
Replies: 12
Views: 419

Re: 300 Piston skirts

I’m not sure about the fatigue either. I don’t know if the block ever overheated or ran dry on oil. There is quite a bit of brown varnish on the bearings and pistons... If I go new, then I’ll probably just grab an upgrade. Gramps’s Sealed Power deal is very tempting. I was not wanting to bore out th...
by sandboxer
Wed Sep 12, 2018 1:32 am
Forum: 240-300 "Big Block" Six Performance
Topic: 300 Piston skirts
Replies: 12
Views: 419

Re: 300 Piston skirts

They are the stock pistons from an 87 block. There is little bore wear with the crosshatch still visible on the non thrust sides. I was going to put new rings and trim the skirts. I’m planning on teardropping the counterweights so I thought to trim some piston weight as well.
by sandboxer
Tue Sep 11, 2018 11:44 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 300 Piston skirts
Replies: 12
Views: 419

Re: 300 Piston skirts

Thanks for the feedback. I’m definitely going to give it a go.
Cheers
S
by sandboxer
Tue Sep 11, 2018 4:51 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 300 Piston skirts
Replies: 12
Views: 419

300 Piston skirts

Has anyone machined off the lower skirt of a stock 300 piston to lighten and prevent future breakage?
Thanks
S
by sandboxer
Fri Aug 31, 2018 10:43 am
Forum: 240-300 "Big Block" Six Performance
Topic: DEGREEING THE DAMPER
Replies: 4
Views: 278

Re: DEGREEING THE DAMPER

Love the tips and tricks, FTF
by sandboxer
Tue Aug 28, 2018 11:37 am
Forum: 240-300 "Big Block" Six Performance
Topic: VINTAGE CHAMP CAR REPLICA BUILD
Replies: 47
Views: 3354

Re: VINTAGE CHAMP CAR REPLICA BUILD

Beautiful work.
by sandboxer
Sat Aug 25, 2018 1:35 am
Forum: 240-300 "Big Block" Six Performance
Topic: 300 torque build 85 Bronco
Replies: 92
Views: 5275

Re: 300 torque build 85 Bronco

What shape of valve do you like for low lift flow?
by sandboxer
Thu Aug 09, 2018 11:23 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 311
Views: 22169

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

Getting back to cam specs for the current head, I'm wondering if a tighter angle and split pattern might be an interesting place to start...
Any ideas on a base line?
by sandboxer
Wed Aug 08, 2018 12:59 am
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 311
Views: 22169

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

Alright!
Time to chime in. Great job on the very obvious improvements over the stock head to the one you're offering. If anyone can match the gains that you've achieved, then great, but for what I see, you've done as good as can be expected.
Cheers
Chris
by sandboxer
Wed Jul 25, 2018 6:51 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 311
Views: 22169

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

Ditto on the great work. It's starting to look like an LS head:)
Sign me up.
Do you think you can go for bigger valves with boost in mind, or will those gains be negligible (your best guess)?
by sandboxer
Mon Jul 23, 2018 8:47 am
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 311
Views: 22169

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

That's fantastic. It might even take on my stock 340 dart. I'm running 91-94 octane at 3500-4500 ft above sea level in the Canadian Rockies. I'm curious as to how much I can push my compression ratio to eke out a bit more...
by sandboxer
Mon Jul 16, 2018 11:30 am
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 311
Views: 22169

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

I am currently buying up all the big sixes I can find in my area. The current total is 5, with 7 transmissions. I think the 240/300 is the biggest untapped gift to hotrodding.
Keep it up guys.
by sandboxer
Thu Jul 12, 2018 1:25 am
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 311
Views: 22169

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

I have 4 engines that need heads for hot rods to be built. Watching closely.
by sandboxer
Wed Jun 27, 2018 9:00 am
Forum: 240-300 "Big Block" Six Performance
Topic: Intake manifold build
Replies: 17
Views: 1191

Re: Intake manifold build

What static compression were you running?
by sandboxer
Sat Jun 23, 2018 2:01 am
Forum: 240-300 "Big Block" Six Performance
Topic: Intake manifold build
Replies: 17
Views: 1191

Re: Intake manifold build

Sorry. I should be clearer. With that firing order, it would be good if the front 3 cylinders and back 3 cylinders alternate with their fuel demands, rather than having 3 cylinders wait for 3 intake cycles before they get their share, and vice versa.
Just a thought.
by sandboxer
Fri Jun 22, 2018 5:10 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Intake manifold build
Replies: 17
Views: 1191

Re: Intake manifold build

You might run into issues with fuel buildup and odd pressure waves with the dormant bank in the off cycle...
Equalization is probably best the way FTF described it.
by sandboxer
Sun Jun 03, 2018 9:49 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 311
Views: 22169

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

Thanks for the effort. I see opportunity on the long side radius on both intake and exhaust. I think a reshaping of the chamber to the scribe line will allow for higher lift flow and a directed flow away from the shrouded sides.
Just a guess...
by sandboxer
Sun Apr 08, 2018 10:14 am
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 311
Views: 22169

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

I've been watching and waiting with anticipation after stating my intention of building a cylinder head and seeing you grab the ball and run hard. Awesome, to say the least. I'm buying up all the blocks I can find:)
Cheers and hats off to those that make stuff happen!
by sandboxer
Wed Feb 28, 2018 9:45 am
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 311
Views: 22169

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

This is very exciting indeed!

Gramps:
How much compression are you going to run to achieve 475hp with the China u-flow?
by sandboxer
Mon Jan 29, 2018 10:25 am
Forum: 240-300 "Big Block" Six Performance
Topic: EBay forged pistons
Replies: 41
Views: 2685

Re: EBay forged pistons

Thanks for the update Bruce! I'm hoping to use this head to 3D scan it, use the computer scan to create a pattern that will be used to cast numerous heads. I would like to test it first, and that means using the composite head, whether it's TIG or braze joined. I would like the head to not leak arou...
by sandboxer
Sun Jan 28, 2018 10:21 pm
Forum: 240-300 "Big Block" Six Performance
Topic: EBay forged pistons
Replies: 41
Views: 2685

Re: EBay forged pistons

Absolutely, and thanks for the input. The foundries have requested the variable be accounted for. Once the patterns are finished, the computer file of the modelling should be able to be adjusted quite readily. It's a very intimidating process. Onwards.
by sandboxer
Fri Jan 26, 2018 2:13 am
Forum: 240-300 "Big Block" Six Performance
Topic: EBay forged pistons
Replies: 41
Views: 2685

Re: EBay forged pistons

T.I.G. it is. The ls6 heads are serving a modelling role at this point. I am entertaining a cast iron head idea, as I have a world class foundry at my doorstep, but it's only for cast iron. With the patterns in place, I can potentially shift to an aluminum cast at any time in the future, with a diff...
by sandboxer
Thu Jan 25, 2018 1:04 am
Forum: 240-300 "Big Block" Six Performance
Topic: EBay forged pistons
Replies: 41
Views: 2685

Re: EBay forged pistons

I will document the entire procedure with a new thread. I have quite a bit of planning to do before I get started, but phone calls and meetings have taken place, so hopefully it will go as smoothly as can possibly be hoped for. It will be a while yet, but I'm committed. The learning curve is a steep...
by sandboxer
Wed Jan 24, 2018 10:32 pm
Forum: 240-300 "Big Block" Six Performance
Topic: EBay forged pistons
Replies: 41
Views: 2685

Re: EBay forged pistons

Ls6 rectangular port heads came in the mail today. Time to start cutting and gluing:)
by sandboxer
Wed Jan 17, 2018 9:38 am
Forum: 240-300 "Big Block" Six Performance
Topic: Sandwich head. Or two piece head.
Replies: 40
Views: 4744

Re: Sandwich head. Or two piece head.

That's exciting! Do you have any photos of the process you could share?
by sandboxer
Tue Jan 16, 2018 9:46 am
Forum: 240-300 "Big Block" Six Performance
Topic: Sandwich head. Or two piece head.
Replies: 40
Views: 4744

Re: Sandwich head. Or two piece head.

Any updates, Worken2much?
by sandboxer
Tue Jan 16, 2018 3:10 am
Forum: 240-300 "Big Block" Six Performance
Topic: EBay forged pistons
Replies: 41
Views: 2685

Re: EBay forged pistons

Not surprised:) but thanks for your effort.
I will proceed with my crazy straight six love affair. Damn the torpedoes!
by sandboxer
Mon Jan 15, 2018 1:24 am
Forum: 240-300 "Big Block" Six Performance
Topic: EBay forged pistons
Replies: 41
Views: 2685

Re: EBay forged pistons

Well I hope the email is fruitful! Either way, we'll learn something. Thanks for that Forgwideman. And FTF, crossflow it is. Pmuller, thanks for the ignition advice. Onwards upwards:)
by sandboxer
Sat Jan 13, 2018 8:26 am
Forum: 240-300 "Big Block" Six Performance
Topic: EBay forged pistons
Replies: 41
Views: 2685

Re: EBay forged pistons

Thanks for that, Fordwideman! Beautiful ideas! The hemi design has always been my personal favourite, and utilizing the Dodge bits in a new concept was a track I was interested in. The quick and dirty is to cut an ls head, 3D scan it, transfer the files to a modelling program, do the necessary mods,...
by sandboxer
Thu Jan 11, 2018 8:47 pm
Forum: 240-300 "Big Block" Six Performance
Topic: EBay forged pistons
Replies: 41
Views: 2685

Re: EBay forged pistons

The intake manifold above the distributor
by sandboxer
Thu Jan 11, 2018 7:16 pm
Forum: 240-300 "Big Block" Six Performance
Topic: EBay forged pistons
Replies: 41
Views: 2685

Re: EBay forged pistons

A common 300ci plenum that has changeable plates for 1 4v and 2 4v carbs. The 1 4v is critical for the forced induction option. A half decent fabricator can also create their own sheet metal plate to create the induction system they want that would bolt to the plenum. If the u flow is an option, the...
by sandboxer
Thu Jan 11, 2018 2:26 pm
Forum: 240-300 "Big Block" Six Performance
Topic: EBay forged pistons
Replies: 41
Views: 2685

Re: EBay forged pistons

Absolutely no cathedrals:) I'm on the ls3 mode, no worries. The chambers will match up w the 300 cam. As far as intakes are concerned, I am interested in designing and casting my own, as well. If this works, there might be some interest from a few manufacturers for additional options.
by sandboxer
Thu Jan 11, 2018 11:25 am
Forum: 240-300 "Big Block" Six Performance
Topic: EBay forged pistons
Replies: 41
Views: 2685

Re: EBay forged pistons

I agree on the wedge idea. I think the ls head is the way to go at this point. If I do this, I only want to proceed if I can make some serious NA numbers (450-500). I'm not sure a u-flow can accommodate the port volumes required.
Thoughts?
by sandboxer
Thu Jan 11, 2018 11:12 am
Forum: 240-300 "Big Block" Six Performance
Topic: EBay forged pistons
Replies: 41
Views: 2685

Re: EBay forged pistons

Great idea on the water pump.
by sandboxer
Thu Jan 11, 2018 10:40 am
Forum: 240-300 "Big Block" Six Performance
Topic: EBay forged pistons
Replies: 41
Views: 2685

Re: EBay forged pistons

2 valve inspired by the 3.8 Jaguar head. Any more at this point and I'm in too deep. Baby steps:)
by sandboxer
Wed Jan 10, 2018 9:06 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Clifford dual Weber 38 set up
Replies: 19
Views: 2129

Re: Clifford dual Weber 38 set up

Whoops. My apologies
by sandboxer
Wed Jan 10, 2018 7:45 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Clifford dual Weber 38 set up
Replies: 19
Views: 2129

Re: Clifford dual Weber 38 set up

Good plan:) but it's only the manifold. No Webers...sadly. But from the sounds of things, I'm on the hunt for some 2100 carbs. There are some cheapo carbs on EBay that are knock offs. Not sure if anyone has tried them. Don't want to spend good money on garbage, but if they are good, I'd like to know...
by sandboxer
Wed Jan 10, 2018 2:47 pm
Forum: 240-300 "Big Block" Six Performance
Topic: EBay forged pistons
Replies: 41
Views: 2685

Re: EBay forged pistons

Thanks pmuller Absolutely! I have three straight forward choices, reconfigured u-flow, cross-flow wedge, and cross-flow hemi. The tough ones are single or double overhead cam. Gear adaptation to clear the waterpump, and mounting to a push rod casting makes the latter choice an interesting challenge....