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Re: Down the rabbit hole, blow through turbo 140 build smoking smiley
Posted by: toms73novass ()
Date: February 02, 2019 09:10AM

Little update, as of now both heads have had:
new guides
deep seats
valve job
Singh groove
step removed
all spark plug holes timeserted
intake and exhaust ported
polish combustion chamber
exhaust ports smoothed



Next CC the combustion chambers.

-Tom


63' Monza Spyder Convertable (in process) MY Build Thread
65' Monza MY Build Thread
73' NovaSS 454 Big block (Sold)
86' BMW 325es
98' VW Jetta TDI, for daughter
01' Audi Allroad Stage 3 twin turbo

NFCC
Grand Island, NY

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Re: Down the rabbit hole, blow through turbo 140 build smoking smiley
Posted by: 63turbo ()
Date: February 02, 2019 10:52AM

Heck of a job Tom! When you did your porting, were you able to get rid of the sharp corners on the carb pads?

------------------------------------

Kevin Nash
Friday Harbor Washington
63 Spyder, Daily driver, EFI read about my project here: [corvaircenter.com]
first test start on EFI here:[www.youtube.com]
first official EFI boost test here:[www.youtube.com]
My new fan! [corvaircenter.com]
engine less 62 Spyder
Canadian 64 Monza Parts car



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Re: Down the rabbit hole, blow through turbo 140 build smoking smiley
Posted by: toms73novass ()
Date: February 02, 2019 11:39AM

I still need to finish the carb pads / openings and reweld the holes I made for access. I might make a formed cutting tool with the shape of a half C to put in the hole to radius the corner.

-Tom


63' Monza Spyder Convertable (in process) MY Build Thread
65' Monza MY Build Thread
73' NovaSS 454 Big block (Sold)
86' BMW 325es
98' VW Jetta TDI, for daughter
01' Audi Allroad Stage 3 twin turbo

NFCC
Grand Island, NY

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Re: Down the rabbit hole, blow through turbo 140 build smoking smiley
Posted by: MattNall ()
Date: February 02, 2019 11:57AM

Every little thing helps!

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

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Re: Down the rabbit hole, blow through turbo 140 build smoking smiley
Posted by: CoCoCo ()
Date: February 02, 2019 12:29PM

I remember reading a little bit about the Singh grooves a few years ago. Was much experimenting done (that we know of) regarding different locations, angles and maybe even slight shape changes?

I'll have to try to google it I guess to see what all has been written, but curious if you guys knew.

Thanks

Paul

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Re: Down the rabbit hole, blow through turbo 140 build smoking smiley
Posted by: Spectre ()
Date: February 02, 2019 01:36PM

Search for Ken Hand on here...he did a very good thread on the Singh groove and reported success.

CoCoCo Wrote:
-------------------------------------------------------
> I remember reading a little bit about the Singh
> grooves a few years ago. Was much experimenting
> done (that we know of) regarding different
> locations, angles and maybe even slight shape
> changes?
>
> I'll have to try to google it I guess to see what
> all has been written, but curious if you guys
> knew.
>
> Thanks
>
> Paul

David Clamp


1965 Corsa convertible - 140 4spd/3.55/AM-FM

2013 Mustang GT convertible - 5.0, 6spd auto, Procharger i-1

2003 Miata SE - 6spd manual (wife's toy)

"Victory is mine!" - SG

Norman, OK

<a href="[www.wunderground.com] src="[weathersticker.wunderground.com]; alt="Click for Norman, Oklahoma Forecast" height="90" width="160"></a>

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Re: Down the rabbit hole, blow through turbo 140 build smoking smiley
Posted by: toms73novass ()
Date: February 02, 2019 02:35PM

Did the initial CC'ing of the heads and the one with the largest volume was 45.4 cc (those that are observant will notice I mistakenly wrote 46.4 cc on the head, oops)



Most of the others came in at 45 two were smaller at 43.4 ish...

Here is a shot on the mill set at 30 deg to mimic the ramp angle of the original profile.

I opened up the two smaller ones to with .2 cc of the largest, still have to do the other one and resmooth and polish.



I will take the remainder needed to bring the compression to 9.0 from the tops of the pistons.

-Tom


63' Monza Spyder Convertable (in process) MY Build Thread
65' Monza MY Build Thread
73' NovaSS 454 Big block (Sold)
86' BMW 325es
98' VW Jetta TDI, for daughter
01' Audi Allroad Stage 3 twin turbo

NFCC
Grand Island, NY

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Re: Down the rabbit hole, blow through turbo 140 build smoking smiley
Posted by: Wagon Master ()
Date: February 02, 2019 04:00PM

Excellent work. The only thing I do differently is to Dykem the gasket surface. Drop in a used head gasket. Scribe the i.d. and unshroud the intake and exhaust valve to the line. There's at least a cc there doing nothing.

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Re: Down the rabbit hole, blow through turbo 140 build smoking smiley
Posted by: 63turbo ()
Date: February 02, 2019 04:31PM

Wagon Master Wrote:
-------------------------------------------------------
> Excellent work. The only thing I do differently is
> to Dykem the gasket surface. Drop in a used head
> gasket. Scribe the i.d. and unshroud the intake
> and exhaust valve to the line. There's at least a
> cc there doing nothing.

That unshrouding is super important for best flow...

------------------------------------

Kevin Nash
Friday Harbor Washington
63 Spyder, Daily driver, EFI read about my project here: [corvaircenter.com]
first test start on EFI here:[www.youtube.com]
first official EFI boost test here:[www.youtube.com]
My new fan! [corvaircenter.com]
engine less 62 Spyder
Canadian 64 Monza Parts car



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Re: Down the rabbit hole, blow through turbo 140 build smoking smiley
Posted by: v8vair ()
Date: February 02, 2019 05:14PM

I question the Singh Groove,Sharp edges would be the last thing I would want in a Combustion Chamber? with a Turbo that's just a Hot spot waiting to detonate. Mike

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Re: Down the rabbit hole, blow through turbo 140 build smoking smiley
Posted by: toms73novass ()
Date: February 03, 2019 05:53AM

Wagon Master Wrote:
-------------------------------------------------------
> Excellent work. The only thing I do differently is
> to Dykem the gasket surface. Drop in a used head
> gasket. Scribe the i.d. and unshroud the intake
> and exhaust valve to the line. There's at least a
> cc there doing nothing.


Will do!

-Tom


63' Monza Spyder Convertable (in process) MY Build Thread
65' Monza MY Build Thread
73' NovaSS 454 Big block (Sold)
86' BMW 325es
98' VW Jetta TDI, for daughter
01' Audi Allroad Stage 3 twin turbo

NFCC
Grand Island, NY

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Re: Down the rabbit hole, blow through turbo 140 build smoking smiley
Posted by: toms73novass ()
Date: February 03, 2019 05:58AM

v8vair Wrote:
-------------------------------------------------------
> I question the Singh Groove,Sharp edges would be
> the last thing I would want in a Combustion
> Chamber? with a Turbo that's just a Hot spot
> waiting to detonate. Mike


We will see,in the final stage the edges will be stoned down and buffed to a slight radius. The edges will be really no more sharp than the one on the raised edge all the way across the squish area.

-Tom


63' Monza Spyder Convertable (in process) MY Build Thread
65' Monza MY Build Thread
73' NovaSS 454 Big block (Sold)
86' BMW 325es
98' VW Jetta TDI, for daughter
01' Audi Allroad Stage 3 twin turbo

NFCC
Grand Island, NY

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Re: Down the rabbit hole, blow through turbo 140 build smoking smiley
Posted by: toms73novass ()
Date: February 03, 2019 11:13AM

Here is a close shot of the Singh groove and the edge sharpness, you can compare it to the one perpendicular which is the squish edge.



-Tom


63' Monza Spyder Convertable (in process) MY Build Thread
65' Monza MY Build Thread
73' NovaSS 454 Big block (Sold)
86' BMW 325es
98' VW Jetta TDI, for daughter
01' Audi Allroad Stage 3 twin turbo

NFCC
Grand Island, NY

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Re: Down the rabbit hole, blow through turbo 140 build smoking smiley
Posted by: toms73novass ()
Date: February 03, 2019 05:35PM

Ended up using the long carbide burr to radius the underside of the carb ports.



Made inserts for the holes in the manifold on the lathe.



Welded in the plugs and somewhat ground down the welds so that they do not interfere with the tins.



Deburred the head and chased all holes, now time for the spring shimming after the other head is finished.



-Tom


63' Monza Spyder Convertable (in process) MY Build Thread
65' Monza MY Build Thread
73' NovaSS 454 Big block (Sold)
86' BMW 325es
98' VW Jetta TDI, for daughter
01' Audi Allroad Stage 3 twin turbo

NFCC
Grand Island, NY

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Re: Down the rabbit hole, blow through turbo 140 build smoking smiley
Posted by: toms73novass ()
Date: February 19, 2019 01:59PM

Had a bit more time getting items together, I polished the crank and the main journals mic at standard size. It is a & nitrated crank so I'm glad no turning will be needed.

The rods journal mic on the lower side of standard 1.799 I might need .001 over sized rod bearings for best fit.



-Tom


63' Monza Spyder Convertable (in process) MY Build Thread
65' Monza MY Build Thread
73' NovaSS 454 Big block (Sold)
86' BMW 325es
98' VW Jetta TDI, for daughter
01' Audi Allroad Stage 3 twin turbo

NFCC
Grand Island, NY

Options: ReplyQuote
Re: Down the rabbit hole, blow through turbo 140 build smoking smiley
Posted by: vairmech ()
Date: February 19, 2019 02:16PM

v8vair Wrote:
-------------------------------------------------------
> I question the Singh Groove,Sharp edges would be
> the last thing I would want in a Combustion
> Chamber? with a Turbo that's just a Hot spot
> waiting to detonate. Mike
>>>>>>>>>>>>>>>>>>>>>>>>>>>

That might be true with a cast iron head but the aluminum can never get that hot to cause the "hot spot" to cause run on or preignition, the head would melt first.

Keep in mind that the Corvair thermistor is only 1/4" under the center of the combustion chamber and the average temp there is 325-425 degrees.

The Singh groove works very well in the race car and I'm pretty sure there is another turbo car here running with the Singh groove in the heads.

Ken Hand
Handy Car Care
248 613 8586

Vairmech@aol.com

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Re: Down the rabbit hole, blow through turbo 140 build smoking smiley
Posted by: MattNall ()
Date: February 19, 2019 02:16PM

It's a blower engine... leave it loose! Think about the Rods side clearance...

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

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Re: Down the rabbit hole, blow through turbo 140 build smoking smiley
Posted by: jjohnsonjo ()
Date: February 19, 2019 02:32PM

BTW I'm like'n all that light I see coming through your de-flashing job.

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


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Re: Down the rabbit hole, blow through turbo 140 build smoking smiley
Posted by: joelsplace ()
Date: February 19, 2019 02:40PM

Loose is bad. Don't build it worn out.
What does rod side clearance have to do with bearing clearance?

Joel
Northlake, TX
5 Ultravans, Lost count at 100 Corvairs...

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Re: Down the rabbit hole, blow through turbo 140 build smoking smiley
Posted by: MattNall ()
Date: February 19, 2019 05:01PM

joelsplace Wrote:
-------------------------------------------------------
> Loose is bad.
====================================================

Joel... Tom will not drive this car daily, let alone go across country twice a year... Very few of us put 5k miles per year...

Tight is friction / heat AND robs hp! These are not modern engines...

I'll take a mid mile engine any day if I want a peppy Vair.. that gives good MPG..

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

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