Posted By: 572_dup2
I did 4-7 cam change - 03/03/13 04:50 PM
Ive also added 8-o2's an felt doing these 2 things at same time was good idea.
I did 4-7 cam change
Posted By: dvw
Re: I did 4-7 cam change - 03/03/13 04:57 PM
Quote:
Ive also added 8o2s an felt doing these 2 things at same time was good idea.
1st cam to 2nd cam specs? 8o2? What Compression?
Doug
Posted By: cheapstreetdustr
Re: I did 4-7 cam change - 03/03/13 05:13 PM
are the 8o2s digital..how are you reading 8 ports?
Posted By: 572_dup2
Re: I did 4-7 cam change - 03/03/13 05:25 PM
I didn't explain that very good. I have racepak with an o2 sensor in every header tube.
Posted By: Clanton
Re: I did 4-7 cam change - 03/03/13 05:27 PM
Quote:
I didn't explain that very good. I have racepak with an o2 sensor in every header tube.
Interesting!I would like to see the headers if you get the chance.
Posted By: tboomer
Re: I did 4-7 cam change - 03/03/13 05:31 PM
Nice,Shawn! Gonna run S/G again this year? 
Posted By: 572_dup2
Re: I did 4-7 cam change - 03/03/13 05:31 PM
.
Posted By: 572_dup2
Re: I did 4-7 cam change - 03/03/13 05:40 PM
Super Comp Ted. Im going to get a round win at National event yet.
Posted By: tboomer
Re: I did 4-7 cam change - 03/03/13 05:41 PM
Good luck!! Go get those piperacks!! 
Posted By: boatracer572
Re: I did 4-7 cam change - 03/03/13 06:05 PM
Good move Sean!! you wont regret spending the $$$$
dded 8 o2 sensors a while back.very helpfull with tuning a pair af carbs.
dded 8 o2 sensors a while back.very helpfull with tuning a pair af carbs.
Posted By: Clanton
Re: I did 4-7 cam change - 03/03/13 06:07 PM
Thx! 
Posted By: tubtar
Re: I did 4-7 cam change - 03/03/13 06:23 PM
Quote:
Super Comp Ted. Im going to get a round win at National event yet.
This picture had me grinning like a kid at Christmas.
Posted By: boatracer572
Re: I did 4-7 cam change - 03/03/13 06:41 PM
headers before coating
Posted By: dvw
Re: I did 4-7 cam change - 03/03/13 07:29 PM
Quote:
I didn't explain that very good. I have racepak with an o2 sensor in every header tube.Quote:
OK I'm brain dead, that makes sense. Cam Specs?
Posted By: mcat4321
Re: I did 4-7 cam change - 03/03/13 09:27 PM
i have read alot about 4-7 swap...
is it really worth the effort?
some of the BESt engine builders in the country dont seem to think so. no matter the order you have 2 side by side firing. some say it changes the deflection on a weaker crank adding a few ponies , but a good crank, no help.. im interested in what you experience
is it really worth the effort?
some of the BESt engine builders in the country dont seem to think so. no matter the order you have 2 side by side firing. some say it changes the deflection on a weaker crank adding a few ponies , but a good crank, no help.. im interested in what you experience
Posted By: astjp2
Re: I did 4-7 cam change - 03/03/13 10:55 PM
Quote:
i have read alot about 4-7 swap...
is it really worth the effort?
some of the BESt engine builders in the country dont seem to think so. no matter the order you have 2 side by side firing. some say it changes the deflection on a weaker crank adding a few ponies , but a good crank, no help.. im interested in what you experience
Its not just he 4-7 you also need the 3-2 swap, if it was not benificial, then there wouldn't be so many nascar teams using it and GM would not have used in in the LS series. I did a lot of research and it has to do with the power pulses in relation to the crank throw position. There are a few articles on this and mostly is had to do with creating a smoother running engine, not really for much more power. Tim
Posted By: slantzilla
Re: I did 4-7 cam change - 03/04/13 08:32 AM
Thing I've seen discussed most is it makes rod bearings last longer.
Posted By: jg309
Re: I did 4-7 cam change - 03/04/13 10:00 AM
the 4 cyl. swap removes the harmoics & my engine runs a lott easer, got different sound aswell
Posted By: 70satelliteguy
Re: I did 4-7 cam change - 03/04/13 06:30 PM
Shawn,off topic just a little but what size headers are those? Also, on the photo with your post I like the way those Good years look during a wheel stand. Not all bundled up or distorted for a car of your weight. What size are those and what pressure are you running in those? I have problems wearing out my sidewalls on my Good Years(31/14.0's)and only working well for 20-30 passes or so.
Thanks MIke
Thanks MIke
Posted By: 572_dup2
Re: I did 4-7 cam change - 03/04/13 07:27 PM
2 1/4 - 2 3/8. An friend an i made those 11yrs. 14x32 Goodyear pressure was 10.5
Posted By: 70satelliteguy
Re: I did 4-7 cam change - 03/04/13 08:39 PM
Thanks Shawn
Posted By: AndyF
Re: I did 4-7 cam change - 03/04/13 09:31 PM
Quote:
i have read alot about 4-7 swap...
is it really worth the effort?
some of the BESt engine builders in the country dont seem to think so. no matter the order you have 2 side by side firing. some say it changes the deflection on a weaker crank adding a few ponies , but a good crank, no help.. im interested in what you experience
The 4-7 swap gives you the old Ford flat head firing order. The 4-7, 2-3 swap makes it the same as a Ford 351W firing order.