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#1
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Speedmaster Heads Heater Nipple
I'm installing a set of Speedmaster heads on my new build and was wondering what everyone is using for the heater nipple? The heads are threaded with what looks like 3/4" NPT, but I haven't found a direct fit part.
I'm thinking 3/4" NPT to smaller NPT reducer bushing and then just use an NPT to nipple, or AN, fitting...
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No! Do not try! Do! Or do not. There is no try. - Yoda 1967 Firebird Restoration 2005 - 1/25/2017 |
#2
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Your thinking is correct.
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1964 Tempest Coupe LS3/4L70E/3.42 1964 Le Mans Convertible 421 HO/TH350/2.56 2002 WS6 Convertible LS1/4L60E/3.23 |
#3
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This is what I used.
EDGE INDUSTRIAL 5/8" Hose ID to 3/4" Male NPT MNPT Straight Brass Fitting Fuel https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1 I also installed a spacer i picked up from home depot to put inside the heater hose to block some of the flow like stock. I used a Hose clamp to keep it in place. Hillman 1/4-in I.D. x 5/8-in O.D. x 3/8-in Long Natural Nylon Spacers
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1979 Firebird Trans Am 301/4spd (Now 428) 1977 Firebird Formula 400/Auto 2007 Grand Prix GXP 5.3L |
#4
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The Edge piece looks exactly what Edelbrock includes with their heads. Think it would be a good idea as Grandville said to reduce diameter to a 1/4" somewhere along the way as Pontiac did with their stock heater nipples. Reduced flow in and full flow out of the heater core should help reduce internal pressure spikes.
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Mick Batson 1967 original owner Tyro Blue/black top 4-speed HO GTO with all the original parts stored safely away -- 1965 2+2 survivor AC auto -- 1965 Catalina Safari Wagon in progress. |
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