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Current Page: 7 of 10
Re: Down the rabbit hole, blow through turbo 140 build smoking smiley
Posted by: zarfnober ()
Date: August 17, 2019 06:34AM

Very nice work Tom, looking forward to hearing results when you get it on the road.

With all the chatter about turbo exhausts,and the difficulty in final assembly, heresmy thoughts;

Use a slip joint at connection under differential, a flex pipe at drivers side ex manifold, and maybe between crossover and inlet. And when we did mine, the wastegate was welded to the crossover, right about where Tom has his, with no other support. A harmonic crack developed there, and was fixed by welding a support bar between it and the inlet. I’m wondering if you may have a problem there yourself Tom, considering the heat generated, I’d be worried something is gonna give with everything mounted solid there. I hope not, as you’ve done a ton of work there. Anyway, just my opinion, keep us updated on your progress, looks great!

Rocco

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Re: Down the rabbit hole, blow through turbo 140 build smoking smiley
Posted by: toms73novass ()
Date: August 17, 2019 01:52PM

Rocco, we will see. I figured since all the pipes are moving with the engine that it would be OK....

-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: martyscarr ()
Date: August 17, 2019 10:12PM

Great work Tom, what turbo are you planning on using?

Marty Scarr

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Re: Down the rabbit hole, blow through turbo 140 build smoking smiley
Posted by: toms73novass ()
Date: August 18, 2019 06:54AM

Right now I am going to try a b-flow turbine and an E compressor. For the street driving I do it should give me boost FAST! Ill see how I like it.

-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: August 28, 2019 04:39PM

OK, Cam break in complete!

I stole the carbs and various accessories off my 65 since right now it is on the storage lift. I wanted to run the new engine on carbs I knew were running carbs no on my fresh rebuilt ones.

I blocked off the two secondary carbs for the time being with a plate under some carb cores.

I installed a standard crossover pipe so I did not have to hook up the turbo.

Ran for 20 minutes above 2k varying the speed.

After I did a compression test and all cylinders were 170-175.

Oil pressure was above 40 and up to 70 at higher rpm's.

All looking and sounding good (except the whistle from the one carb).

Here is a quick video of it running.

[youtu.be]

-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



Edited 1 time(s). Last edit at 08/28/2019 04:39PM by toms73novass.

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Re: Down the rabbit hole, blow through turbo 140 build smoking smiley
Posted by: toms73novass ()
Date: September 04, 2019 07:56AM

Started on the carb rebuilds. I drilled out all passage plugs and cleaned with welding tip cleaners. Good thing I did, one of the idle passages had white corrosion.

Next I carefully sanded the lower carb bodies flat on a granite surface plate backed sandpaper, both the bottom and top surface.

Since I am pressurizing them I want to give them as much advantage as possible to seal well.

I also flattened the cluster face. I removed the tubes with modified pliers so I did not crush the tubes.



Here is the cluster with tubes removed.



Started to flatten, as you can see not quite flat.





much better:


Reinserted tubes to same depth after cleaning them also.

Next to solder brass rod across floats to keep them from collapsing.

-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: September 06, 2019 03:09AM

The base of the carbs are all set for reassembly, new throttle shafts, oring seals for the ends just in case.

Soldered brass rod to the sides of the floats to help keep them from collapsing under boost.

Also prepped where the throttle shafts enter the carbs and flattened them perpendicular with the shaft for a better oring seal.



-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: American Mel ()
Date: September 06, 2019 08:57PM

Reinforcing the floats is a good idea.
Just curious though.
How much lower will they float with that extra weight on them?
I realize that you can adjust them to make up for it.
But how do you know how much to adjust them?

-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-
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, '62 Monza Wagon, '63 Spyder, '65 Corsa
.
non-vair
'04 Dodge Cummins Quad Dualy, approaching 400K
17'Terry

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Re: Down the rabbit hole, blow through turbo 140 build smoking smiley
Posted by: toms73novass ()
Date: September 07, 2019 04:29AM

Ill find out!

Others that have done it have not indicated a problem.

They still float quite easily.

-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: September 07, 2019 05:01AM

Thanks to Steve Goodman for reminding me that I should slightly counter bore the orings so that they are positively engaged to keep internal pressure from pushing them out of place.

I used a 7/16 counterbore:



Here it is assembled oring stay sealed much better than if just sitting flat on the surface. I also added a few washers for a bit more preload.



Also all the floats are set at 1 -3/16" due to the larger float valve opening vs the stock size. I have run this setting with good results on my current set.



-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: jjohnsonjo ()
Date: September 07, 2019 05:03AM

You can fill a bowl with an unmodified float, add fuel, then measure the height of the float with a straight edge and plunge caliper, then replace it with a modified one in the same fuel and measure again.

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: toms73novass ()
Date: September 07, 2019 05:05AM

jjohnsonjo Wrote:
-------------------------------------------------------
> You can fill a bowl with an unmodified float, add fuel, then measure the height of the float with a straight edge and plunge caliper, then replace it with a modified one in the same fuel and measure again.

I will! thumbs upthumbs up

-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



Edited 1 time(s). Last edit at 09/07/2019 05:05AM by toms73novass.

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Re: Down the rabbit hole, blow through turbo 140 build smoking smiley
Posted by: toms73novass ()
Date: September 07, 2019 06:30AM

OK checked 3/32 difference!

So if my thinking is correct I should set the floats at 1-3/16+3/32 = 1-9/32

Correct? I'm not thinking upside down right?

-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: September 07, 2019 06:32AM

American Mel Wrote:
-------------------------------------------------------
> But how do you know how much to adjust them?

I'd adjust the spring on the hinge until it held the float almost weightless when placed upright. (like stock)

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Re: Down the rabbit hole, blow through turbo 140 build smoking smiley
Posted by: Spectre ()
Date: September 07, 2019 06:48AM

Great attention to detail...this will be an awesome build.

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: September 07, 2019 12:54PM

Well I decided to go with a "heavy 1-3/16" this way even if I am at the other extreme with the heavier floats I still should be more than the 1-1/16 minimum.

The springs do seem to take a lot of the weight off of the floats, I was not able to adjust them any more than the work as stock.

-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



Edited 1 time(s). Last edit at 09/07/2019 12:55PM by toms73novass.

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Re: Down the rabbit hole, blow through turbo 140 build smoking smiley
Posted by: joelsplace ()
Date: September 07, 2019 01:06PM

I would have never thought to reinforce floats like that. I was thinking you would drill a hole though them and solder in a brass tube. Light and much stronger.
If you wanted to get really crazy you could build a pressure chamber to solder them in so the internal pressure is about 30psi. Then you wouldn't need any bracing if they didn't balloon.

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: steve c goodman ()
Date: September 07, 2019 01:26PM

When I did a blow-through system in the
70s I came up with the idea to fill with
foam of some kind. I unsoldered the hole
and used a spray can with foam insulation.
Needless to say several floats were ruined
during that experiment. HINT (foam expands
after being shot into the float)!! I
finally did get two floats and two spares
done. My adventure used to be written
in autoxer website, not sure whether it
is still there. Good job Tom

best wishes, Steve
Rear Engine Spec. Inc. Golden, Colo.

1962 spyder 3.0L turbo---1965 Crown V8
1967 monza 110/4---1968 monza 110/4
1971 amante gt 110/4
CORSA/RMC/PPCC/V8 Registry

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Re: Down the rabbit hole, blow through turbo 140 build smoking smiley
Posted by: MattNall ()
Date: September 07, 2019 01:29PM

Still there!

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: September 07, 2019 03:30PM

joelsplace Wrote:
-------------------------------------------------------
> I would have never thought to reinforce floats like that. I was thinking you would drill a hole though them and solder in a brass tube. Light and much stronger.
> If you wanted to get really crazy you could build a pressure chamber to solder them in so the internal pressure is about 30psi. Then you wouldn't need any bracing if they didn't balloon.

Yeah thinking a small thin wall brass tube through the center as well. At least the way he did it is easily reversible, if Tom wants to experiment with a hollow tube idea.

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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Current Page: 7 of 10


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