408 streetable?
1st Gear Member
Joined: May 2007
Posts: 140
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RE: 408 streetable?
The only problem with driving 408s on the street is after a few thousands miles and some abuse the rings wear do to the rod ratio and the angle its onputs a uneven load on the rings and they wear.
5th Gear Member
Joined: Jan 2006
Posts: 2,760
From:
RE: 408 streetable?
ORIGINAL: Matt Paul
The only problem with driving 408s on the street is after a few thousands miles and some abuse the rings wear do to the rod ratio and the angle its onputs a uneven load on the rings and they wear.
The only problem with driving 408s on the street is after a few thousands miles and some abuse the rings wear do to the rod ratio and the angle its onputs a uneven load on the rings and they wear.
5th Gear Member
Joined: Jan 2006
Posts: 3,926
From: Puerto Rico
RE: 408 streetable?
Oh no!....another R:S discussion..... and from a CI customer?.....
OK, OK.....here are some examples of OEM engines and their R:S ratios:
BBC 454 = 1.5338 from the factory
SBC 400 = 1.4840 from the factory
I6 Ford 250 = 1.5038 from the factory
Now, the 408 variants are 1.50, 1.53 and 1.56.....why would they last less than the 454's and I6 250's I've serviced with 250k+ miles?.....comercial duty BTW.
OK, OK.....here are some examples of OEM engines and their R:S ratios:
BBC 454 = 1.5338 from the factory
SBC 400 = 1.4840 from the factory
I6 Ford 250 = 1.5038 from the factory
Now, the 408 variants are 1.50, 1.53 and 1.56.....why would they last less than the 454's and I6 250's I've serviced with 250k+ miles?.....comercial duty BTW.
1st Gear Member
Joined: May 2007
Posts: 140
From:
RE: 408 streetable?
ORIGINAL: FullAuto
Please don't tell me you actually believe this crap. Look at your sig. You're obviously doing something right. Jay Allen would burn you at the stake if he saw you post this.
ORIGINAL: Matt Paul
The only problem with driving 408s on the street is after a few thousands miles and some abuse the rings wear do to the rod ratio and the angle its onputs a uneven load on the rings and they wear.
The only problem with driving 408s on the street is after a few thousands miles and some abuse the rings wear do to the rod ratio and the angle its onputs a uneven load on the rings and they wear.
TahnksMatt Paul
P.S. The only thing Jay Has done for me is the cam the motor was assembiled and combo thought upby me and my friend in building 7 in Livoina Mi Nascardepartment for roush if you talked to Joel he has some pics and info on thisFall auto if you want some pics and info let me know.
D.R. THE PATHETIC DORK
Joined: Jun 2007
Posts: 30,871
From: West Virginia
RE: 408 streetable?
most people never get 100,000 miles out of their 347's and 408's because what they were built for.....and one purpose in mind....to race it....increase performance = decrease reliability....is there a happy medium yes but it's a give and take senerio...I have a friend with 80000 miles on his 347 and it's still running great but then again it doesn't see track duty....also you'll find out when you get a 500 hp plus car built you want to drive it less and less on the street...as someone mentioned above it becomes a pain in the ace! that's what I thought I would do is drive mine everyday but once I slapped the big cam, heads and 11 to 1 compression with a slew of other mods....yeah the car goes ***** to the wall but man it's nerve racking driving it...loud lumpy idle and rides like a board on wheels with all the chasis stiffening I've done.....it's more of a full on race car now
6th Gear Member
Joined: Feb 2005
Posts: 13,396
From: KY
RE: 408 streetable?
ORIGINAL: mjr46
most people never get 100,000 miles out of their 347's and 408's because what they were built for.....and one purpose in mind....to race it....increase performance = decrease reliability....is there a happy medium yes but it's a give and take senerio...I have a friend with 80000 miles on his 347 and it's still running great but then again it doesn't see track duty....also you'll find out when you get a 500 hp plus car built you want to drive it less and less on the street...as someone mentioned above it becomes a pain in the ace! that's what I thought I would do is drive mine everyday but once I slapped the big cam, heads and 11 to 1 compression with a slew of other mods....yeah the car goes ***** to the wall but man it's nerve racking driving it...loud lumpy idle and rides like a board on wheels with all the chasis stiffening I've done.....it's more of a full on race car now
most people never get 100,000 miles out of their 347's and 408's because what they were built for.....and one purpose in mind....to race it....increase performance = decrease reliability....is there a happy medium yes but it's a give and take senerio...I have a friend with 80000 miles on his 347 and it's still running great but then again it doesn't see track duty....also you'll find out when you get a 500 hp plus car built you want to drive it less and less on the street...as someone mentioned above it becomes a pain in the ace! that's what I thought I would do is drive mine everyday but once I slapped the big cam, heads and 11 to 1 compression with a slew of other mods....yeah the car goes ***** to the wall but man it's nerve racking driving it...loud lumpy idle and rides like a board on wheels with all the chasis stiffening I've done.....it's more of a full on race car now
5th Gear Member
Joined: May 2007
Posts: 2,872
From: Warner Robins,GA
RE: 408 streetable?
And to answer you header question. I use MAC 1 3/4 long tubes. The fit is tight, but does fit. You have to run your steering shaft thru the pipes. Mine has no rubbing at all. I am thinking of stepping up my headers though. When i put the header gasket on it was covering a good bit of the exhaust port, not horizontal but vertical wise. I wound up using my dremel tool to shave away some the gasket. I have been lucky so far, not leaks.
1st Gear Member
Joined: May 2007
Posts: 140
From:
RE: 408 streetable?
ORIGINAL: Joel5.0
How's that 4-eyed monster doing?.......any new vids of the "baby" in action?......
How's that 4-eyed monster doing?.......any new vids of the "baby" in action?......
The monster is doing great and Ron and I will have new vids by end on september.Joel if you can post the link from SBF that Ron posted that would be great I cant post vids on the forums lack of equipment.