Aaron_1973
Member
- Joined
- May 20, 2015
- Messages
- 10
- Reaction score
- 0
- Location
- New Zealand
- My Car
- 1973 Convertible, 351C 2V H code.
Hi there
Have been here a while but haven't posted much as there is plenty of information here and don't want to repeat questions. This particular question I can't seem to find and answer on though. I have a 1973 convertible, 351C 2V engine, C6.
The original cast iron exhaust manifolds for a 351C 2V engine, how much do they dampen the sound inside the cabin of the car versus headers while driving on the highway? Or is the difference not worth worrying about? Maybe the fact I've got a convertible means I'm thinking about the wrong things here because I've just got a fabric roof??
Would consider going the FPA header route if I stick with the header direction as hookers I had in the past (6921HKR) hung too low, got caught on something and broke an engine mount, need something with good ground clearance. Currently using a set of Sanderson 4V blockhugger shorty headers with the copper adapters to suit 2V heads but put them on at a time when I hadn't learnt about scavenging effects, the power I'm putting out doesn't warrant such large primary tubes. But then again perhaps I'm being finicky and maybe it wouldn't matter. The FPA's have a slightly smaller primary tube size which is more desirable for what I want, ideally something a tad smaller yet again would be better still but ground clearance issues mean nothing is available like that that I can see, needs to suit a 4R70W also which will be installed in future and FPA's fit the bill there.
Have been tinkering for a while with my car and got the fuel consumption to go from 13.8 US mpg (tired engine when purchased, jetted much too large etc etc), now revamped and much time spent on it it's getting about 18.8 US mpg now at 60 to 65mph. And I haven't put in the 4R70W / gone EFI yet so that will be interesting, aiming to max out at around 25 US mpg which I think would be pretty phenomenal. And before someone says why would you spend that much time getting a little more milage, well because I can.... lol Fuel is more expensive here in NZ too. Would love to share my thoughts on how to get maximum economy if anyone wants to know although that may require a separate post.
Many thanks for your time.
Aaron
Have been here a while but haven't posted much as there is plenty of information here and don't want to repeat questions. This particular question I can't seem to find and answer on though. I have a 1973 convertible, 351C 2V engine, C6.
The original cast iron exhaust manifolds for a 351C 2V engine, how much do they dampen the sound inside the cabin of the car versus headers while driving on the highway? Or is the difference not worth worrying about? Maybe the fact I've got a convertible means I'm thinking about the wrong things here because I've just got a fabric roof??
Would consider going the FPA header route if I stick with the header direction as hookers I had in the past (6921HKR) hung too low, got caught on something and broke an engine mount, need something with good ground clearance. Currently using a set of Sanderson 4V blockhugger shorty headers with the copper adapters to suit 2V heads but put them on at a time when I hadn't learnt about scavenging effects, the power I'm putting out doesn't warrant such large primary tubes. But then again perhaps I'm being finicky and maybe it wouldn't matter. The FPA's have a slightly smaller primary tube size which is more desirable for what I want, ideally something a tad smaller yet again would be better still but ground clearance issues mean nothing is available like that that I can see, needs to suit a 4R70W also which will be installed in future and FPA's fit the bill there.
Have been tinkering for a while with my car and got the fuel consumption to go from 13.8 US mpg (tired engine when purchased, jetted much too large etc etc), now revamped and much time spent on it it's getting about 18.8 US mpg now at 60 to 65mph. And I haven't put in the 4R70W / gone EFI yet so that will be interesting, aiming to max out at around 25 US mpg which I think would be pretty phenomenal. And before someone says why would you spend that much time getting a little more milage, well because I can.... lol Fuel is more expensive here in NZ too. Would love to share my thoughts on how to get maximum economy if anyone wants to know although that may require a separate post.
Many thanks for your time.
Aaron
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