Question about cams
06-13-2018, 04:38 AM
#11
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Join Date: Jan 2018
Location: Pennsylvania
Posts: 2,327
Like I said, a not so sweet spot... The idle can be upped while in gear too,
should be around 800 RPM while in gear, idle. I would not go much above
that, would be too much friction on the clutch pack...
It's not the first time I have heard that, even back in the day with carburetors, it
sounded like that at idle, and then you either adjusted the A:F manually at the
carb, or tweaked the distributor... It was easy then, now, you need a tuner
to to those adjustments for the cam.
06-13-2018, 09:25 AM
#12
Thread Starter
Join Date: Mar 2015
Location: KY
Posts: 39
That, and under that slight load there is more air and fuel going into the motor.
Like I said, a not so sweet spot... The idle can be upped while in gear too,
should be around 800 RPM while in gear, idle. I would not go much above
that, would be too much friction on the clutch pack...
It's not the first time I have heard that, even back in the day with carburetors, it
sounded like that at idle, and then you either adjusted the A:F manually at the
carb, or tweaked the distributor... It was easy then, now, you need a tuner
to to those adjustments for the cam.
Like I said, a not so sweet spot... The idle can be upped while in gear too,
should be around 800 RPM while in gear, idle. I would not go much above
that, would be too much friction on the clutch pack...
It's not the first time I have heard that, even back in the day with carburetors, it
sounded like that at idle, and then you either adjusted the A:F manually at the
carb, or tweaked the distributor... It was easy then, now, you need a tuner
to to those adjustments for the cam.
06-13-2018, 03:54 PM
#15
Thread Starter
Join Date: Mar 2015
Location: KY
Posts: 39
So i guess this can be chalked up to this being a normal problem with big cams? Nothing can really be done about it?
& I guess so, thats kinda odd though.At like 500-550 it sounds really lopey and doesnt make that noise. Only problem is that its not very loud at that rpm, and the car acts like it wants to die when coming to a stop
& I guess so, thats kinda odd though.At like 500-550 it sounds really lopey and doesnt make that noise. Only problem is that its not very loud at that rpm, and the car acts like it wants to die when coming to a stop
06-13-2018, 04:39 PM
#16
Banned
Join Date: Jan 2018
Location: Pennsylvania
Posts: 2,327
You should have heard what people did in the 60s and 70s with Big Radical cams. They
sounded like yours, just that back then it was the "thing" and now, kids don't like the
sound of it.
Have you ever heard a funny/drag car at idle? They sound like that, that blub-blub-blub-blub-blub
lop sided idle, but much louder because of the straight pipes.
Does your exhaust have an "X" pipe or "H" pipe? The "X" pipe may also reduce some of
that with it's better scavenging properties than an "H" pipe. "X" pipes help scavange
exhaust from the cylinders. If you already have an "X" pipe, well, then there's not
much more that can be done except fine mechanical tuning.
Like you said, you've been dealing with it for 4 years now. These cams are specifially
made for that old muscle car sound.
These all do the same thing at idle:
Do a search on yahoo for the ***** thumpr cams, and watch all the videos, they all do it.
sounded like yours, just that back then it was the "thing" and now, kids don't like the
sound of it.
Have you ever heard a funny/drag car at idle? They sound like that, that blub-blub-blub-blub-blub
lop sided idle, but much louder because of the straight pipes.
Does your exhaust have an "X" pipe or "H" pipe? The "X" pipe may also reduce some of
that with it's better scavenging properties than an "H" pipe. "X" pipes help scavange
exhaust from the cylinders. If you already have an "X" pipe, well, then there's not
much more that can be done except fine mechanical tuning.
Like you said, you've been dealing with it for 4 years now. These cams are specifially
made for that old muscle car sound.
These all do the same thing at idle:
Do a search on yahoo for the ***** thumpr cams, and watch all the videos, they all do it.
Last edited by 08'MustangDude; 06-13-2018 at 04:41 PM.
06-13-2018, 04:47 PM
#17
Thread Starter
Join Date: Mar 2015
Location: KY
Posts: 39
You should have heard what people did in the 60s and 70s with Big Radical cams. They
sounded like yours, just that back then it was the "thing" and now, kids don't like the
sound of it.
Have you ever heard a funny/drag car at idle? They sound like that, that blub-blub-blub-blub-blub
lop sided idle, but much louder because of the straight pipes.
Does your exhaust have an "X" pipe or "H" pipe? The "X" pipe may also reduce some of
that with it's better scavenging properties than an "H" pipe. "X" pipes help scavange
exhaust from the cylinders. If you already have an "X" pipe, well, then there's not
much more that can be done except fine mechanical tuning.
Like you said, you've been dealing with it for 4 years now. These cams are specifially
made for that old muscle car sound.
These all do the same thing at idle:
https://youtu.be/ZXbyZ8jHJ9g
https://youtu.be/Bago4Utlxng
Do a search on yahoo for the ***** thumpr cams, and watch all the videos, they all do it.
sounded like yours, just that back then it was the "thing" and now, kids don't like the
sound of it.
Have you ever heard a funny/drag car at idle? They sound like that, that blub-blub-blub-blub-blub
lop sided idle, but much louder because of the straight pipes.
Does your exhaust have an "X" pipe or "H" pipe? The "X" pipe may also reduce some of
that with it's better scavenging properties than an "H" pipe. "X" pipes help scavange
exhaust from the cylinders. If you already have an "X" pipe, well, then there's not
much more that can be done except fine mechanical tuning.
Like you said, you've been dealing with it for 4 years now. These cams are specifially
made for that old muscle car sound.
These all do the same thing at idle:
https://youtu.be/ZXbyZ8jHJ9g
https://youtu.be/Bago4Utlxng
Do a search on yahoo for the ***** thumpr cams, and watch all the videos, they all do it.
It's an offroad X pipe. So by mechanical tuning I'm guessing you'd have to reinstall the cams again?
06-13-2018, 05:18 PM
#18
Banned
Join Date: Jan 2018
Location: Pennsylvania
Posts: 2,327
As far as mechanical timing?
After listening to those videos with the other mustangs, it seems normal...
I listened to SEVERAL of them, they were all the same... So, I don't think there
is really a problem at all. The only reason to mess with the timing, like a tooth
one way or the other, would be to stop that lop sided idle, but it seems that's
what they're made to do.
Oh, it is for power, the sound is the side effect....
After listening to those videos with the other mustangs, it seems normal...
I listened to SEVERAL of them, they were all the same... So, I don't think there
is really a problem at all. The only reason to mess with the timing, like a tooth
one way or the other, would be to stop that lop sided idle, but it seems that's
what they're made to do.
Oh, it is for power, the sound is the side effect....
06-13-2018, 05:56 PM
#19
Thread Starter
Join Date: Mar 2015
Location: KY
Posts: 39
As far as mechanical timing?
After listening to those videos with the other mustangs, it seems normal...
I listened to SEVERAL of them, they were all the same... So, I don't think there
is really a problem at all. The only reason to mess with the timing, like a tooth
one way or the other, would be to stop that lop sided idle, but it seems that's
what they're made to do.
Oh, it is for power, the sound is the side effect....
After listening to those videos with the other mustangs, it seems normal...
I listened to SEVERAL of them, they were all the same... So, I don't think there
is really a problem at all. The only reason to mess with the timing, like a tooth
one way or the other, would be to stop that lop sided idle, but it seems that's
what they're made to do.
Oh, it is for power, the sound is the side effect....
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