Did the Hi-Perf 270hp 2X4 motor use a heat riser, or the spacer, from the factory in 1960? I am getting both answers.
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Re: '60 270hp heat riser yes/no?
It came equipped with a heat riser. -
Re: '60 270hp heat riser yes/no?
It came equipped with a heat riser.Comment
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Re: '60 270hp heat riser yes/no?
Bernie,
I just read a catalog that states a heat riser is for "all except the special high performance" engines. Is the 270 not one of those? Also, is this a documented fact somewhere? I have many books, but none of them list anything about it, just curious to why its not in any publications.
Thanks for the response,DonComment
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Re: '60 270hp heat riser yes/no?
Bernie,
I just read a catalog that states a heat riser is for "all except the special high performance" engines. Is the 270 not one of those? Also, is this a documented fact somewhere? I have many books, but none of them list anything about it, just curious to why its not in any publications.
Thanks for the response,DonComment
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Re: '60 270hp heat riser yes/no?
Don,
If you go though some of the old Chevy catalogs you will find listings for the heat riser (Manifold Heat control valve) and the notation "except F.I." for years 57-60.Comment
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Re: '60 270hp heat riser yes/no?
Don,
If you go though some of the old Chevy catalogs you will find listings for the heat riser (Manifold Heat control valve) and the notation "except F.I." for years 57-60.Comment
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Check your AIM
The heat riser valve was installed on the line at St. Louis, so your AIM
should have the correct answer. The base engine, of course, had a heat riser and the RPO section will list any variation for optional engines. Of course, the FI engines did not have one, but I believe your investigation of the AIM will should that a heat riser valve was installed on the 270.
DukeComment
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Check your AIM
The heat riser valve was installed on the line at St. Louis, so your AIM
should have the correct answer. The base engine, of course, had a heat riser and the RPO section will list any variation for optional engines. Of course, the FI engines did not have one, but I believe your investigation of the AIM will should that a heat riser valve was installed on the 270.
DukeComment
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Re: '60 270hp heat riser yes/no?
All carbureted engines used heat riser valves.Comment
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Re: '60 270hp heat riser yes/no?
All carbureted engines used heat riser valves.Comment
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Re: '60 270hp heat riser yes/no?
I looked at your original post earlier, and decided not to reply because I, too, found my older parts manual confusing when it says the heat riser was used for 57-61 "exc. FI, H/Per."... 270hp would seem to be a high performance engine (it's noted as having "special high performance camshaft" in the front of the parts book, as is the 315hp F.I. engine).
Today I took another look at the parts book and gave the question more thought.
In another section of the parts manual where the coil spring for the heat riser valve is listed, it says the application is for 57-60 "exc. F.I.". I suspect the real question here is whether the intake manifold has the needed passages for the exhaust gases to travel through to warm the carb bases when the right side ehaust is blocked by the valve.... don't have one to look at, except photos of the top of installed manifolds, which appear to have those passages, so my opinion is "yes", the valve would be used... just as I EXPECT it would be used in any carbureted setup.Comment
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Re: '60 270hp heat riser yes/no?
I looked at your original post earlier, and decided not to reply because I, too, found my older parts manual confusing when it says the heat riser was used for 57-61 "exc. FI, H/Per."... 270hp would seem to be a high performance engine (it's noted as having "special high performance camshaft" in the front of the parts book, as is the 315hp F.I. engine).
Today I took another look at the parts book and gave the question more thought.
In another section of the parts manual where the coil spring for the heat riser valve is listed, it says the application is for 57-60 "exc. F.I.". I suspect the real question here is whether the intake manifold has the needed passages for the exhaust gases to travel through to warm the carb bases when the right side ehaust is blocked by the valve.... don't have one to look at, except photos of the top of installed manifolds, which appear to have those passages, so my opinion is "yes", the valve would be used... just as I EXPECT it would be used in any carbureted setup.Comment
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Re: '60 270hp heat riser yes/no?
In my opinion, AIM's (57-61) are somewhat confusing regarding usage of a heat-riser or spacer on 2x4 applications between 245hp, and 270hp(hi-lift cam version) engines.
However, all carbureted engines used a heat-riser. Only the FI versions used the spacer. I remember the replacement of a frozen heat-riser 20 years ago on a friend's 270hp '59... the car had been in storage, and had less than 25k miles on the odometer.Comment
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Re: '60 270hp heat riser yes/no?
In my opinion, AIM's (57-61) are somewhat confusing regarding usage of a heat-riser or spacer on 2x4 applications between 245hp, and 270hp(hi-lift cam version) engines.
However, all carbureted engines used a heat-riser. Only the FI versions used the spacer. I remember the replacement of a frozen heat-riser 20 years ago on a friend's 270hp '59... the car had been in storage, and had less than 25k miles on the odometer.Comment
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