Carb Fuel Boil
Race Director
Joined: Mar 2016
Posts: 14,396
Likes: 8,203
From: Napa Valley California
Contact Sanderson Headers in Inglewood CA.
They have been manufacturing header systems for over 50 years and their quality is top notch.
Their shorty headers are awesome and on their website you can see the dyno runs they did and compared their shorty headers with long tube headers and stock ram horns.
They ceramic coat the interior and exterior of their headers and they really reduce the under hood temperatures.
Their welds are so perfect they actually recommend bolting them up without gaskets.
I think they are the best quality headers on the market.
If you don’t like the idea of going to headers they also manufacture cast exhaust manifolds that many people swear by.
I also believe that you should install either a carb spacer or an oem type heat plate to help the problem.
They have been manufacturing header systems for over 50 years and their quality is top notch.
Their shorty headers are awesome and on their website you can see the dyno runs they did and compared their shorty headers with long tube headers and stock ram horns.
They ceramic coat the interior and exterior of their headers and they really reduce the under hood temperatures.
Their welds are so perfect they actually recommend bolting them up without gaskets.
I think they are the best quality headers on the market.
If you don’t like the idea of going to headers they also manufacture cast exhaust manifolds that many people swear by.
I also believe that you should install either a carb spacer or an oem type heat plate to help the problem.
Drifting
Joined: Oct 2020
Posts: 1,567
Likes: 576
From: Wisconsin
Hello everyone and thanks for the feedback. I just want to reiterate this is only an issue after stopping and shutting off the car. Not while I'm driving, no high temps even on the highway. I stopped the car, ate lunch, had a few beers, came out and the car when i started it said 230+. So I've got an underhood temp issue I'm trying to solve. Mind you I live in Ohio and it was an unusually hot day for us, 90+ degrees. I'll try to answer as many questions as I can:
- L48 mostly stock engine with an Edelbrock 1406 carb
- Yes there is a return fuel line.
- 16" electric fan mounted directly to the radiator, it moves alot of air.
- starter has no issues cranking the engine (typically the car will start almost immediately when I crank it)
- carb was devoid of fuel during this scenario
- Tested temps with my infrared thermometer and the gauge is correct.
I read a lot, and I mean a LOT of overheating threads on these forums and there are two themes running through all of them.
1. These cars worked properly with the factory engineered cooling systems, so try getting as close to them as possible, and
2. Everyone who has a cooling problem seems to think they are smarter than the factory engineers and mods the hell out of the cooling system looking for answers. And usually not finding them.
Stop treating the symptoms and get to the root cause.
Several on here have mentioned timing as a huge contributor to excess engine heat, but I didn’t see where you addressed that.
Sorry if I came across as rude but I want (like pretty much everyone wants) you to get your problem solved and be enjoying your wheels instead of stressing about them.
Thread Starter
Advanced
Joined: Apr 2016
Posts: 92
Likes: 5
Thanks. I'm not discounting the timing side of things. I have Lar's paper and will take a look this weekend. Was out of town last week and kids/life is in the way right now. I do appreciate everyone's input.
