|
Register or Log In To remove these advertisements. |
|
|
|
|||||||
 |
|
|
Thread Tools | Display Modes |
|
|
02-27-2006, 12:00 AM
|
#1 |
|
Registered User
Join Date: Jan 2006
Location: so. cal
Posts: 111
|
Do I need a heat riser valve ?
I've got the headers removed, and stock rams horn manifolds ready to go back on, Intake side has with an Edelbrock manifold and non-stock Holly 4bbl.
Any need to put the heat riser valve back on ? PS. I Put 1' pipe stubs on so hopefully nothing gets burned on the trip to the muffler shop, except maybe my ears..It's kind of LOUD....) John.
__________________
1987 GMC heavy half Shortwide-GONE  1971 LWB 350/350-GONE 1972 Buick Skylark (80K orig. miles,one family owned) 2002 Currie Phat Flyer (Pit Vehicle) STOLEN  .............................................. |
|
|
|
02-27-2006, 07:28 AM
|
#2 |
|
Senior Member
Join Date: Jul 2001
Location: Muskegon,MI,USA
Posts: 6,026
|
Re: Do I need a heat riser valve ?
The heat riser valve, when closed forces exhaust gases to pass through the exhaust passege way in the intake manifold on a stock engine. The reason behind this is to warm up the carb faster and the intake manifold mounted choke.
We don't run heat riser valves on any of our vehicles even though we are in a colder climate and don't notice any adverse effects. Truck owners in colder climates then here could possible notice the effects of not running heat riser valves. We run without them primarily because of the restriction on the exhaust flow and the frequent problems experienced with them as they tend to stick or rattle over time. Jim |
|
|
|
|
02-27-2006, 08:23 AM
|
#3 | |
|
Registered User
Join Date: Oct 2003
Location: Central Vermont
Posts: 8,538
|
Re: Do I need a heat riser valve ?
Quote:
 heat riser valves are mostly a PITA over time/use.I never run ther either but at times do notice it. The biggest problem I run into not having one is during those "almost" freezing rainy/damp days when the carb wants to ice up. I figure a decent comprimise would be to at least run a stove pipe to the air cleaner, that would give some warmer air. |
|
|
|
|
|
02-27-2006, 11:25 AM
|
#4 |
|
Registered User
Join Date: Jan 2000
Location: Wyoming USA
Posts: 2,446
|
Re: Do I need a heat riser valve ?
I noticed that the heat riser are chamferd to accept a donut to help seal for leaks.I have allways gutted the flapper and put a donut in and run it.How do you guys get the exhaust to seal ?My rams horn's are not chamferd on that side so I thought that they would not seal very good.
__________________
2001 Silverado K-1500 2005 FXDWG stage3 69 CHEVY Short/Step 327/4L60 373 posi 63 IMPALA 327 |
|
|
|
|
02-27-2006, 01:07 PM
|
#5 |
|
Registered User
Join Date: Jan 2006
Location: so. cal
Posts: 111
|
Re: Do I need a heat riser valve ?
Thank's everyone for the input. The RH manifold I have has the chamfer, but it is not the original. Maybe it was from an engine with cable choke. Casting # RH12 3896956.Looks like I'm going to leave it off. 75 and older has no smog check in CA so it's good to go.
__________________
1987 GMC heavy half Shortwide-GONE 1971 LWB 350/350-GONE 1972 Buick Skylark (80K orig. miles,one family owned) 2002 Currie Phat Flyer (Pit Vehicle) STOLEN .............................................. |
|
|
|
|
02-27-2006, 01:15 PM
|
#6 |
|
Registered User
Join Date: Oct 2003
Location: Central Vermont
Posts: 8,538
|
Re: Do I need a heat riser valve ?
Found this surfing CK5
It's an adaptor made to replace the heat riser valve. http://coloradok5.com/forums/showthread.php?t=162423 Last edited by vtblazer; 02-28-2006 at 07:38 AM. |
|
|
|
|
| Bookmarks |
|
|
Hybrid Mode
