Hey guys. I've posted a similar topic at the other site but would like to to get the IAC Forum's take on the matter.
I was able to pick up the heater boxes & necessary tin/tubes/brackets from a '79 fed engine for cheap. I am looking to use this system when it becomes necessary to rebuild my current engine (consuming some oil now but compression is still pretty good - 120+ all around), which is a stock 1800 EFI. If all goes as planned, rebuild will be a Camper Special.
Other than the square/oval ports, how does the 72-74 & 79 heater boxes differ? Any opinions on these systems over the stock 75-78 boxes (breathability, heating, etc)?
Thanks!
'79 Federal Heat Exchangers
- patayres
- I'm New!
- Location: Bend, Oregon
- Status: Offline
'79 Federal Heat Exchangers
1975 Westfalia Helsinki - 1800 EFI w/ Pertronix
1965 Singlecab - 1600dp
1965 Singlecab - 1600dp
- bretski
- Ellipsis-Meister
- Location: out of hibernation...for now
- Status: Offline
- Amskeptic
- IAC "Help Desk"
- Status: Offline
Re: '79 Federal Heat Exchangers
The '72-'74 heat exchangers dump directly into the muffler, and are blessedly free of the later joints and nonsensical circuitous exhaust path and bending triangular flanges that just love to leak.patayres wrote: Other than the square/oval ports, how does the 72-74 & 79 heater boxes differ? Any opinions on these systems over the stock 75-78 boxes (breathability, heating, etc)?
Colin
BobD - 78 Bus . . . 112,730 miles
Chloe - 70 bus . . . 217,593 miles
Naranja - 77 Westy . . . 142,970 miles
Pluck - 1973 Squareback . . . . . . 55,600 miles
Alexus - 91 Lexus LS400 . . . 96,675 miles
Chloe - 70 bus . . . 217,593 miles
Naranja - 77 Westy . . . 142,970 miles
Pluck - 1973 Squareback . . . . . . 55,600 miles
Alexus - 91 Lexus LS400 . . . 96,675 miles
- patayres
- I'm New!
- Location: Bend, Oregon
- Status: Offline
This is the '79 fed heater boxes I just got:
I thought the '79 boxes dump directly into the muffler as well... or at least can if the '79 exhaust is changed out for the 72-74 system (same trapezoid mounts). I'm not in an area of Oregon that requires smog testing and don't plan to use the '79 crossover & exhaust. Probably a Thunderbird system.
Are these '79 boxes the same internally as the 72-74? I vaguely remember reading somewhere that one type has more internal fins for heating...
I thought the '79 boxes dump directly into the muffler as well... or at least can if the '79 exhaust is changed out for the 72-74 system (same trapezoid mounts). I'm not in an area of Oregon that requires smog testing and don't plan to use the '79 crossover & exhaust. Probably a Thunderbird system.
Are these '79 boxes the same internally as the 72-74? I vaguely remember reading somewhere that one type has more internal fins for heating...
1975 Westfalia Helsinki - 1800 EFI w/ Pertronix
1965 Singlecab - 1600dp
1965 Singlecab - 1600dp