Corvair DiagramCorvair Photo
Corvair Center
home forum corvairs calendar links Corvair Podcast
California Corvairs
Clarks Corvair
Clarks Corvair
“CORSA"



Chevy Corvair License Plate
Chevy Corvair Chrome Wheel
Corvair Center Forum :  Corvair Center Phorum The fastest message board... ever.
Corvair Center 
Pages: 12345678Next
Current Page: 1 of 8
Billet cylinder heads UPDATE!!
Posted by: racingguy2 ()
Date: December 29, 2019 12:30PM

I can't locate the old thread, so I will start a new updated progress report here! After a few delays, I am back on track to start the new cylinder head project!
I have a CAD design modeled up and ready to start cutting. I just bought two cnc mills, a 3-axis 4020 Fadal, and a 5-axis Kitamura, and should be cutting chips this week!



Edited 1 time(s). Last edit at 12/29/2019 12:52PM by MattNall.

Attachments:

Options: ReplyQuote
Re: Billet cylinder heads UPDATE!!
Posted by: MattNall ()
Date: December 29, 2019 12:58PM

Great news! TKnobby here / Tom Knoblauch / [americanflat6.com] is involved in all aspects of re-finishing, and may be interested.


You came in on Page 7

MODERATOR
Sea Mountain, between Charleston Harbor and Coos Bay! SW Oregon Coast
Click HERE for My Website...Click HERE for My TechPages!
..............................110-PG.................................................Webered-Turbo




Edited 1 time(s). Last edit at 12/29/2019 01:11PM by MattNall.

Options: ReplyQuote
Re: Billet cylinder heads UPDATE!!
Posted by: FLSteve ()
Date: December 29, 2019 12:59PM

If I had words to speak I could fill the internet... so WOW!!!

Options: ReplyQuote
Re: Billet cylinder heads UPDATE!!
Posted by: CoCoCo ()
Date: December 29, 2019 01:25PM

Following this thread. Been waiting for re-designed cylinder heads for 40 years, and I'm sure some here for even longer!

Good luck. And don't hesitate to post new pics as the chips fly.

Thanks

Paul

Options: ReplyQuote
Re: Billet cylinder heads UPDATE!!
Posted by: TedBrown ()
Date: December 29, 2019 01:36PM

Great news,

Maybe time to think about EFI port injection. Keep us updated

Ted

**NEW** Dual TBI KITS are now available through Clarks Corvair
**DIS and 4 TBI units are available through Corvair-EFI.com
Ted Brown
Anderson, SC
[www.Corvair-EFI.com]
Brown Injection Facebook
68 Monza Convert Auto - EFI
61 Loadside - PGlide - EFI
61 Rampside - 4 speed - EFI
61 Greenbrier 4 speed - EFI
61 Greenbrier 4 Speed - Bad Motor

Options: ReplyQuote
Re: Billet cylinder heads UPDATE!!
Posted by: Wagon Master ()
Date: December 29, 2019 02:16PM

TedBrown Wrote:
-------------------------------------------------------
> Great news,
>
> Maybe time to think about EFI port injection. Keep us updated
>
> Ted


Do you prefer port vs. direct injection to wash/cool the intake valves?

Options: ReplyQuote
Re: Billet cylinder heads UPDATE!!
Posted by: racingguy2 ()
Date: December 29, 2019 02:25PM

Shhh! The first set is going to be fuel injected! cool smiley
But I designed and will be making conventional heads as well.
As luck would have it, there is a small airport around the corner from my house, and I made friends with an aviation mechanic that gave me a lot of insight on corvair heads, and the solutions that Lycoming came up with! If things work out as well as the cad dynamics analysis indicates, it's going to be a very big improvement!

Options: ReplyQuote
Re: Billet cylinder heads UPDATE!!
Posted by: racingguy2 ()
Date: December 29, 2019 02:38PM

It depends on application. GDI is still relatively new and requires features that aren't practical for a retrofit, especially on this engine. Port injection is better for all out race level HP and everyday drive-ability, but throttle body injection can be made to outperform both for fuel efficiency and emissions.

Personally, I'm not a GDI fan. Liquid gasoline doesn't burn...
GDI atomizes the fuel, but vaporization time is more limited than Port injection.
Throttle body injection on the other hand has the opportunity to pre-heat the fuel/air mixture to near vapor point before it enters the combustion chamber.

Options: ReplyQuote
Re: Billet cylinder heads UPDATE!!
Posted by: jjohnsonjo ()
Date: December 29, 2019 02:55PM

I luv this stuff, let the chips fly.


The wife and I are both running KIA GDI turbos, great so far, but its not a retrofit.

J.O.

65 Corsa Turbo Vert
79 Honda XL 500S
69 Honda CL 160 D
2010 BMW F 650 GS
2003 Bounder 36D
2013 KIA Optima SX turbo-AKA ZIPPY (wife,s car)
69 Newport Holiday Sailboat
Baja 150 dune buggy cart
Coleman HS 500 UTV
2016 KIA Sorento SXL Turbo

Bethlehem,Pa


Options: ReplyQuote
Re: Billet cylinder heads UPDATE!!
Posted by: joelsplace ()
Date: December 29, 2019 03:03PM

Keeping the intake valves clean is the biggest problem. Lots of fancy additives in fuel to keep them clean but it doesn't do any good if the fuel never touches the valves.

Joel
Northlake, TX
5 Ultravans, 113 Corvairs and counting...

Options: ReplyQuote
Re: Billet cylinder heads UPDATE!!
Posted by: racingguy2 ()
Date: December 29, 2019 03:03PM

This is the only Direct Injection I have worked on!

Attachments:
Options: ReplyQuote
Re: Billet cylinder heads UPDATE!!
Posted by: 63spyder ()
Date: December 29, 2019 03:53PM

We have a Scion FR-S that runs both multi port injection and direct injection, were pushing 70000 miles and absolutely no problems with the car. Flat four Subaru engine ,rear wheel drive, six speed tranny

Wayne in Glide Oregon
63 spyder conv.(wifes car finished ,owned 17 years)65 monza conv.unfinished 14 years and never driven,yet!!!.61 rampside (new toy and distraction)

Options: ReplyQuote
Re: Billet cylinder heads UPDATE!!
Posted by: chris ()
Date: December 29, 2019 06:08PM

Always cool to see innovation!

'65 Monza 4 door
4 speed
110hp
Gardner, KS

Heart of America Corvair Owners Association

Options: ReplyQuote
Re: Billet cylinder heads UPDATE!!
Posted by: vairmech ()
Date: December 29, 2019 06:38PM

Keep in mind FI is nice but the SCCA racing sanctions say we have to run carbs! If you are going for any race applications keep that in mind. After that there is no rule about not doing anything with head work.

Here is a quick rundown of the major rules for the engine.

Stock stroke
Stock rod Length
.040" overbore
4 1.5" bore Rochester carbs
or
2 40 IDA Weber carbs w/34mm chokes
or
1 Holley 390 cfm

No FI allowed.

Unrestricted exhaust is paramount!

How about a design for an overhead cam head?

Also keep in mind that aircraft have way more air available for cooling that our Corvairs do with the fan.

Ken Hand
Handy Car Care
248 613 8586

Vairmech@aol.com



Edited 1 time(s). Last edit at 12/29/2019 06:40PM by vairmech.

Options: ReplyQuote
Re: Billet cylinder heads UPDATE!!
Posted by: American Mel ()
Date: December 29, 2019 06:59PM

vairmech Wrote:
-------------------------------------------------------
> Keep in mind FI is nice but the SCCA racing sanctions say we have to run carbs! If you are going for any race applications keep that in mind. After that there is no rule about not doing anything with head work.
>
> Here is a quick rundown of the major rules for the engine.
>
> Stock stroke
> Stock rod Length
> .040" overbore
> 4 1.5" bore Rochester carbs
> or
> 2 40 IDA Weber carbs w/34mm chokes
> or
> 1 Holley 390 cfm
>
> No FI allowed.
>
> Unrestricted exhaust is paramount!
>
> How about a design for an overhead cam head?
>
> Also keep in mind that aircraft have way more air available for cooling that our Corvairs do with the fan.


BUT . . . . . if the Nash Fan lives up to expectations, cooling will take a giant leap forward when ever it becomes commonly available.

-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-
WA. state, 1 mile south of the Canadian border,
I am not at the end of the world, but you can see it from here.
Have; '66 Monza Coupe - 140, 4-spd. Daily driver beater
'67 Monza Vert. - 140, 4-spd. Daily driver beater
'67 A/C Moredoor Monza
Have had; '61 Monza coupe, 80hp, PG
'62 Monza Wagon, 4spd.
'63 Spyder,
'65 Corsa
.
non-vair
'04 Dodge Cummins Quad Dually, approaching 400K
'03 Honda Del Sol
17'Terry

Options: ReplyQuote
Re: Billet cylinder heads UPDATE!!
Posted by: rowin4 ()
Date: December 29, 2019 08:10PM

Do you start out with a BIG block of aluminum or a block of wood or something cheap to do the trial sample?

Options: ReplyQuote
Re: Billet cylinder heads UPDATE!!
Posted by: racingguy2 ()
Date: December 29, 2019 09:24PM

Start with a big block of aluminum, carve away everything that doesn't look like a cylinder head!

Options: ReplyQuote
Re: Billet cylinder heads UPDATE!!
Posted by: CoCoCo ()
Date: December 29, 2019 11:43PM

And the chips are fully recyclable, so not a complete waste at all.
At least if you have a convenient return resource that is.

Are there planes where the cooling fins can be extended for greater area?
And what about designed-in "fin dampers" to lower noise? In the old days the motorcycles had rubber inserts (high-temp variety obviously) wedged into certain areas of the cooling fins for the single purpose of reducing noise.
A thin bar of material left in certain spots could serve the same purpose.

I had read somewhere years ago that regarding port injection, certain builds achieved higher power (not sure about efficiency with fuel) by moving the injectors a little further away from the back of the valves.
This might mean that instead of the bung being in the head itself, it might be ok to keep it in the intake runner, near the head.

Paul

Options: ReplyQuote
Re: Billet cylinder heads UPDATE!!
Posted by: CoCoCo ()
Date: December 29, 2019 11:49PM

You could even design an intake system that has the individual runners with injector bungs near the ends, but also an "intercooler" of sorts at the upper end of the runners. This intercooler would be a plenum area above the engine cooling fan that takes advantage of the air flow.

More than just some small fins on the intake tubes, but an actual area of substantial cooling fins in the air stream.
I know you're only working on the cylinder heads at this point, but a modular system with separate intake would seem a natural segué.

Fun stuff to think about.

Paul

Options: ReplyQuote
Re: Billet cylinder heads UPDATE!!
Posted by: gnvair ()
Date: December 30, 2019 05:48AM

What will the port and chamber designs be based on? Has a design been hashed out yet?

Lee J

Options: ReplyQuote
Pages: 12345678Next
Current Page: 1 of 8


Sorry, only registered users may post in this forum.
This forum powered by Phorum.