Cazman
Active Member
This is described as '67 Imperial exhaust. I am looking for '68 300 HP exhausts and this looks different. Not HP,I guess. But, are the exhausts different per model and year?
They look cool those HP manifolds and I have them but from what I have read and been told they don't in themselves add much power. But they look much better than logs and worth getting in my opinion.
Manifolds themselves are good for 7-10 more horses depending on what you put them on. Don't help much on low compression smog motors, more effective on the older high compression models.
Nope. Summit distributor with a recurve in it so not needed.Very tidy, Cbarge!
But why is your vac advance capped off? Do you not use it?
Nope. Summit distributor with a recurve in it so not needed.
Wrong your killing your piston rings at part throttle cruise.Nope. Summit distributor with a recurve in it so not needed.
This is described as '67 Imperial exhaust. I am looking for '68 300 HP exhausts and this looks different. Not HP,I guess. But, are the exhausts different per model and year?
View attachment 222667
Looks like 64 street wedge exhaust manifolds
Probably not. They don't have significantly larger passages, and they all dump into a single log, unlike the logs of most C-bodies.Are they better than what is on my stock 68 300?
We interrupt this thread......Can you give us details?
Will hook it up when she comes out of storage in the springWrong your killing your piston rings at part throttle cruise.
Part throttle = molecules further apart no matter the compression ratio of the engine. Molecules further apart equals slower burning flame front, in order to get as many burned as possible you have to light it earlier (more spark advance), unburned fuel waste fuel (bad mpg) and dilutes your oil causing more wear. Running anything but a dedicated race car (track only) without a vacuum advance is foolish $
You may need to slow the VA rate or more importantly make it drop out faster when you add throttle at cruise to prevent pinging. Adjustment is done with 3/32nd allen wrench through the vacuum nipple.Will hook it up when she comes out of storage in the spring