|
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? |
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. |
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
|
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...
|
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!
|
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/ |
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 |
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? |
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 |
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.
|
1 Attachment(s)
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 |
From here I, I would have to say the one on the left.
|
| All times are GMT -7. The time now is 10:50 PM. |
Powered by vBulletin® Version 3.8.0
Copyright ©2000 - 2025, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.6.0
The representations expressed are the representations and opinions of the clubcobra.com forum members and do not necessarily reflect the opinions and viewpoints of the site owners, moderators, Shelby American, any other replica manufacturer, Ford Motor Company. This website has been planned and developed by clubcobra.com and its forum members and should not be construed as being endorsed by Ford Motor Company, or Shelby American or any other manufacturer unless expressly noted by that entity. "Cobra" and the Cobra logo are registered trademarks for Ford Motor Co., Inc. clubcobra.com forum members agree not to post any copyrighted material unless the copyrighted material is owned by you. Although we do not and cannot review the messages posted and are not responsible for the content of any of these messages, we reserve the right to delete any message for any reason whatsoever. You remain solely responsible for the content of your messages, and you agree to indemnify and hold us harmless with respect to any claim based upon transmission of your message(s). Thank you for visiting clubcobra.com. For full policy documentation refer to the following link: