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08-19-2004, 08:58 PM
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CC Member
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Join Date: Mar 1999
Location: TACOMA,
WA
Cobra Make, Engine: Everett Morrision FE 427 so 2-4s
Posts: 2,008
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Not Ranked
427 SFI crank dampeners vs OEM
# what is the bennifits or advantages of a SFI rated dampener?
What brands of SFI rated dampeners are available for an FE?
Part numbers and sources please.
When would an upscale dampener be needed?
Does it realy work better or are OEM dampeners in good shape not available?
__________________
Mike H
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08-20-2004, 03:47 AM
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CC Member
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Join Date: Sep 2002
Location: Hickory,
NC
Cobra Make, Engine: ERA 427SC w/427so, ERA GT #2002
Posts: 1,106
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Not Ranked
Michael:
The OEM damper is perfectly ok, but if you're interested in getting the best, go with an ATI damper for eliminating most of the vibes. Advantages of an SFI rated damper . . . it meets someone's minimum standards. That's it. Better to go with a race-proven performance product if max performance is your goal.
__________________
Tom
"If you can make black marks on a straight from the time you turn out of a corner until the braking point of the next turn, then you have enough HORSEPOWER." Mark Donohue
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08-20-2004, 04:11 AM
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Senior Club Cobra Member
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Join Date: Jul 2000
Location: Las Vegas,
NV
Cobra Make, Engine: ERA 427 SO
Posts: 1,126
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Not Ranked
Mike, just beware: I've been told by several reputable sources (including ATI) that fluid-filled balancers are recommended as race-only, not for street...seems the silicone goo in them causes major IMBALANCE on cold starts...but as I'm thinking about it, does a race-only motor ever get a "warm" start? Hmmmm
__________________
Ken
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08-20-2004, 04:13 AM
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Senior Club Cobra Member
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Join Date: Jul 2000
Location: Las Vegas,
NV
Cobra Make, Engine: ERA 427 SO
Posts: 1,126
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Not Ranked
Also, there was a post about a year ago where someone reported dyno tests that showed the factory balancer made more horsepower than any other tested! Of course, that doesn't address the safety aspect of stock v. after-market...
__________________
Ken
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08-20-2004, 04:50 AM
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CC Member
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Join Date: Mar 2003
Cobra Make, Engine:
Posts: 1,514
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Not Ranked
When I had my engine rebuilt last year I was dead set on going with a fluid dampner but was talked out of it (that's about all though!) based on the builders experience with the original unit. He said what I had is exactly what they used on the Stock cars and drag cars in the '60's and there was NO need to change it and that mine was just fine. Of course if you go to Cobra Retoreres your paying MORE for that original unit than the new Race stuff - typical FE!
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08-20-2004, 07:15 AM
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CC Member
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Join Date: Sep 2002
Location: Hickory,
NC
Cobra Make, Engine: ERA 427SC w/427so, ERA GT #2002
Posts: 1,106
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Not Ranked
Saying again, use an ATI damper if your budget allows. It is the one currently preferred by professional engine builders. It does the best at what a damper should do . . . damp vibrations. But if you're not going to be turning your engine much over 5,000 rpm, it doesn't matter much which damper you use as long as it's in good condition.
Check out what ATI says: http://www.atiperformanceproducts.co...mpers/testing/
__________________
Tom
"If you can make black marks on a straight from the time you turn out of a corner until the braking point of the next turn, then you have enough HORSEPOWER." Mark Donohue
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08-20-2004, 08:18 AM
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CC Member
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Join Date: May 2002
Location: San Francisco CA,
Posts: 525
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Not Ranked
The key words here are "good shape"
95% of the 40 year old original OEM dampeners I looked at have all those nice cracks and chunks missing from the vulcanized rubber ring between the hub and shell.
If you find and OEM NOS, hermetically sealed, climate controled environment stored balancer, I would have no problem using it.
I have seen the result of a dampener failing. It ain't pretty.
If you do use an old dampener, make sure you check top dead center on the engine and verify the timing marks on the dampener.
I have seen them all over the place.
Then make sure to mark the hub and shell to verify if the shell moves because the rubber is no good and you can't set your timing anymore. and also you might as well add the rest of the timing degree numbers and then mark the shell ever 90 degrees to help valve adjustment. or...
Hang the old unit on the wall and buy a new dampener.
Do you remeber the scene in "Casino" when all the old Mafia bosses were in the back room of the courthouse trying to decide if they should whack a potential "loose end"
Everyone vouched for him untill the last boss said,
"Why take a chance? Anyway, that's how I see it"
I agree.
--Mike
__________________
They bend 'em, we mend 'em.
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08-20-2004, 08:50 AM
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CC Member
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Join Date: Mar 1999
Location: TACOMA,
WA
Cobra Make, Engine: Everett Morrision FE 427 so 2-4s
Posts: 2,008
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Not Ranked
I need part numbers for an 427 FE appliation .I see lots of Chevey stuff.When going through several brands I saw one.it was ment for 460 that could be used if I had the spacer cut 1/2".Tuning , how likely am I to do that in car in my little garageIs the tuning nessessary? I want one out of the box.And pulley sets that fit and don't require trips to welder and machinist.Is life a struggle for everyone?
What does ATI's #916581( adapter) look like and how much will all this cost?
Any body put all this together?Is the Dove colant pump I allready have OK?
__________________
Mike H
Last edited by Michael C Henry; 08-20-2004 at 09:13 AM..
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08-20-2004, 09:55 AM
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CC Member
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Join Date: May 2002
Location: San Francisco CA,
Posts: 525
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Not Ranked
If you don't want to spend a lot of money I know someone who used one of these and it fit fine.
I also like the Romac or BHJ for direct bolt on.
The ATI requires to use of a BB Chevy pulley of modified stock pulley
http://cgi.ebay.com/ebaymotors/ws/eB...category=33616
--Mike
__________________
They bend 'em, we mend 'em.
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08-20-2004, 10:44 AM
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CC Member
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Join Date: Mar 1999
Location: TACOMA,
WA
Cobra Make, Engine: Everett Morrision FE 427 so 2-4s
Posts: 2,008
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Not Ranked
I have a really good shape OEM damper with a intergal single groove pulley. What I was headed for was a good to great damper that I could attach a two groove pulley to.I may or maynot change my stamped steel coolant pump two groove pulley.The end result is I could move my single groove Ford alt out from the right head about 5/8" and run the single belt on the outside position.This project is headed for beyond $500.I have a whole new appreaciation for a completed and running car.I keep thinking about the guys that think they'll build one on the cheap .I'd never be happy with it.It's allmost as bad as a boat,but I can walk farther than I can swim.
__________________
Mike H
Last edited by Michael C Henry; 08-20-2004 at 01:54 PM..
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08-20-2004, 10:47 AM
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CC Member
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Join Date: Nov 2002
Location: SoCal,
CA
Cobra Make, Engine: KMP 283
Posts: 35
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Not Ranked
Which aftermarket damper or damper/pulley assembly comes closest to matching the "look" of the original 427 damper with the integral pulley?
Which one of these is the "real deal"?
Steve Blackmon
Southern California
Last edited by plissken; 08-20-2004 at 10:50 AM..
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08-20-2004, 02:00 PM
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CC Member
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Join Date: Mar 1999
Location: TACOMA,
WA
Cobra Make, Engine: Everett Morrision FE 427 so 2-4s
Posts: 2,008
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Not Ranked
From here I, I would have to say the one on the left.
__________________
Mike H
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