Jon Myers Delete option:-)

[Laemmle]

Went the full Monte.....while changing over to all stainless exhaust and mufflers, I took the suggestion of Jon Myer and eliminated the exhaust heat riser........Jon sells a spacer of the approximate thickness as the heat riser..........well so far so good.....car is a bit easier to start after a run...and hot.

[Tom Bredehoft]

I built one of those myself. I had a piece of 9/16 aluminum plate, saber sawed it out, works a charm.

[img=left]http://www.alink.com/personal/tbredehoft/Avatar1.jpg[/img=left]
Tom Bredehoft
'53 Commander Coupe (since 1959)
'55 President (6H Y6) State Sedan
....On the road, again....
'05 Legacy Ltd Wagon
All Indiana built cars

[silverhawk]

I got a quick question. What does the blocking off of the heat riser obtain? Wouldn't you still need it in colder weather?

Dylan Wills
[IMG][/IMG]
'61 lark deluxe 4 door wagon

[DEEPNHOCK]

Actually, it is better described as replacing the heat riser valve with a spacer block.
Then there is no blocking off of the exhaust from one side of the exhaust and forcing all of that banks exhaust to go through the heat crossover passage in the intake manifold and into the center port of the opposite side's head.
The original heat riser valve closed to provide a fast heating of the carb to promote good cold weather running.
Once the heat riser valve has been replaced the exhaust is free to flow out of both sides.
But since there is some sharing of exhaust gasses through the intake heat passages, the problems with todays fuel makes vapor lock easier to happen.
So...
A lot of people block off the heat crossover port in the intake manifold, keeping all/most of the exhaust heat off the intake manifold and the carb.
This can only be done if the heat riser valve is gutted, wired open, or replaced with a hollow spacer plate.
This tact is fine for a warm weather, occaisionaly driven car or truck.
But for full season driving in cold climates, this change should be considered carefully.
HTIH
Jeff[8D]

quote:Originally posted by silverhawk

I got a quick question. What does the blocking off of the heat riser obtain? Wouldn't you still need it in colder weather?

[JeffDeWitt]

quote:Originally posted by DEEPNHOCK
This tact is fine for a warm weather, occaisionaly driven car or truck.
But for full season driving in cold climates, this change should be considered carefully.
HTIH
Jeff[8D][/b][/navy]

Exactly, I've had FAR more problems with "improvements" than anything Studebaker ever did.

Jeff DeWitt

http://carolinastudes.net

[silverhawk]

Thanks for the lesson guys! [8D]

Dylan Wills
[IMG][/IMG]
'61 lark deluxe 4 door wagon

[Laemmle]

FYI,

The Avanti is only driven between April and the end of Oct......

[Laemmle]

FWIW...........

I just computed that the Avanti has averaged just one thousand miles per year .........:-)

[Laemmle]

Also installed special carb to intake gaskets.....from Edelbrock to block excessive heat from the carb itself. So far so good..........lets see how she is during July and August :-)

[bams50]

Yes, do let us know how it works out in the hottest weather. Would be great if your changes add up to a cure.

Robert (Bob) Andrews- on the IoMT (Island of Misfit Toys)
Parish, central NY 13131

GOD BLESS AMERICA
Ephesians 6:10-17

[Laemmle]

Hey Bob,

I see you B an earlier riser like me! :-)

Don't ya love the great state of ny???

quote:Originally posted by bams50

Yes, do let us know how it works out in the hottest weather. Would be great if your changes add up to a cure.

Robert (Bob) Andrews- on the IoMT (Island of Misfit Toys)
Parish, central NY 13131

GOD BLESS AMERICA
Ephesians 6:10-17

[Laemmle]

Well..........I now have a working heat riser for sale.......any interest??

[DEEPNHOCK]

Well...This works great on an AFB equipped Stude V8 with an electric choke.
BTDT a bunch of times...
And blocking the heat crossover passage does keep the carb temp down a bit.
BTDT a bunch of times...

The one BIG thing that has changed in the 56+ years since Studebaker engineering died...is the gasoline.

Updates and improvements to make a Studebaker run better on today's gasoline should be explored, tested, tried, expected, and shared.

Like I said... Consider it carefully for what you are trying to accomplish.

Describe the 'problems' you have had with the 'improvements' you have done?
I am curious to add to my "Don't do that" file.
I am more than willing to learn from your pain...
Jeff[8D]

quote:Originally posted by JeffDeWitt
Exactly, I've had FAR more problems with "improvements" than anything Studebaker ever did.