Inliners International Forums General Discussion Bench racing somethings coming to life

Now after some time in the works somethings are beginning to come into the production works. These are right from the casting mold. Now to get the gating removed and get the other jigs built to start the machining process. Some changes are already being made to the original design I/we had and that is to add the injector pads to the runners.
These are for the chevy 6cyl and the 4cyl.

Good work Larry! It is good to see these In the works.

Looks good Larry! Those patterns worked good for me and I'm sure you'll get a lot of use out of them.

Thank you. We had them cast in two different types of aluminum, for a few different reasons and I could tell you this one of them could maybe bring a house down and the other one maybe blow away in the wind. They are both the same thickness. But one outweighs the other. By close too 6.5lbs Which can be called a lot of weight when you are looking to shave off weight.

That sounds odd.
6.5 lbs. as what percentage of the entire casting?
Big percent of some heavier metal in the alloy (probably nothing lighter!)?

Not really, 1 weighed in at 12.96lbs and the other weighed in at 7.16 There has not been any machining only the gating and flashing has been removed. These are completely two different types/grades of Alum.

I weighed one of the 6 cylinder ones Larry that I fully machined, and it was right at 10 lbs. I used 356 grade aluminum, it polishes and machines real good, plus if you are going to put threads in it, it's one of the strongest grades as well. Some cheaper grades can strip bolts out with very little effort, or the threads become real loose after putting bolts in and out a few times.

The lighter one is made of the 356 And we are pretty happy with it tipping @ 7lbs. And I should have everything else I need to finish making the jigs for them in a few days.

It's always nice to get a new part in your hand. The next step of machine work can be a challenge. Best to take time and make great jigs to hold, then machine work can go much smoother and faster.

He got all my fixturing for them that I created when I had them, so he's good to go in that regard.

Really .... I think I said I needed to finish making the jigs to hold the parts, and honestly, it's not that much of a challenge, it's not first rodeo making jigs to hold some of my parts. And I got the drill fixtures from Scott when I bought the patterns from him. So that took one jig fixture out of the picture right off the top. The only real big change I made to them was to add the injector pads which was a pretty easy thing to do.
And there are more parts coming.

well to give a little update. Steps 1 and 2 are complete at this point. (The gasket surfaces)

Those look good Larry. Most of if us don't know how much work goes into a part after you pour hot metal into a hole in a box of sand.

Looks like step 1 and 2 were a success. The finish looks nice.

Yeah, I know right, When I am done with all the machine work, Then I will take care of the knit picky stuff Then into the tumbler maybe? (And get that parting line better addressed) And step 3 is done so that takes care of the head side. Fits great.

It's really nice work Larry. When finished does it stay together as a single piece or become three separate pieces? Which carb is it designed for (Dellorto, SU, Weber or all of the above)?

I would suggest tumbling or shotblasting before performing machine work. Those casting lines be deburred/ sanded before blasting also.

No kidding this isn't my first casting rodeo, The casting lines can and should be even less of a line. I made these myself a few yrs. ago which had very little casting/Parting line. I learn my stuff firsthand / hands on 90% of the time very little secondhand learning. So honestly, I don't feel your qualified to tell me how it should be done. These are only test pieces
to start with to check for issues in the casting itself (porosity issue etc.) And as I said before changes were being made because I didn't get the injector pads onto the intake patterns before they hit the foundry.
But none the less thanks for the input.


This is the type of work I know the foundry can do little no line to clean up, but some parting line will always be there unless you're doing a lost wax or Foam casting. Because the molding process is totally different. Hence the reason you didn't see any parting line ON MY Lumps Like what was on Clyde's lumps.



Yes the top stat housing is different than the lower stat housing. Two different molds. top was my work/casting bottom was from the founrdy.

Stock49 Right now they only being done for the webbers, I don't have either of the others to check it with to see if the bores match or can be drilled Both ways. But I will be looking into that more, you are the sec one who has asked me kind of the same question.

IIRC that bolt pattern & bore center are the same for Weber DCOE, Dell'Orto, and Mikuni PHH; perhaps some solex?

You are correct panic....as usual! LOL

I kind of thought so but wasn't 100% sure at the time so I did not comment yea or Nea

Well, the carb side is done. Only the linkage towers are left to do.



And I think they will also port out nicely.

Looking good. One thing I spotted is the core shift that brings the carb bore very close to the outer flange. It varied on the two you have shown. You may need to make the flange area wider or reduce the bore of the carb throats. It could be a problem for people to get carbs to seal.

Yep, It's all part of a process. You do it, you check it, you fix it, then you do it again.........till it's good enough. Perfection is part of another process.

They fit just fine so once again your 2cents is not need. Mr.Lowe. The jig plates fit like they should and so does base template, The O ring gaskets will seal (known as softseals ) just fine as well. And seeing that some of these Intakes have already been out there Nothing has come back with any issues.

Wanted or not. This is the area I am referencing. The area looks much thinner than other areas of the intake. Just trying to help you out.

we had addressed that along with a few other things. And again these were only TEST castings. For machine time and what nots.
Just like these new guys for the 4cyl.

You've got to start somewhere. R&D, who else shows it? It lets us see what goes into the parts we part with our money for. I don't understand any of this. Well, a little bit.

Well one of the things we seen and think? is one part of a small issue is the Core piece itself. We think they made other cores as we see a little egg shape in the carb port/s but not in all the ports. And the 4cyl intake is what also gave me/we a better clue as to what may have happened in the 6cyl, and with having both poured at the same time we think???? It for surely is that extra time was not taken in the curing process of the cores and may have been laying on their side and this is what could have caused the egg shape???? But pretty much it comes down to quality control.
I will more than likely do carb surface this weekend So I will get a better look to see if we have the same issue on any of those ports.

Between cores and pattern boxes, there can be a LOT of unwanted movement. Have had to figure out ways to keep things in better alignment myself. Like you said test and perfect the process.

I'M Done, Peace out the board is all yours.