Cobra Make, Engine: ERA 824 with 470 FE BBM street 427
Posts: 550
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Quote:
Originally Posted by DanEC
Good old NHV measures. The street is one thing and the race track another.
Well, NHV is a new one to me, so rather than embarass myself here, I figger'd I'd Google it...
Rank Abbr. Meaning
NHV Nordiska Högskolan för Folkhälsovetenskap (Swedish: Nordic School of Public Health)
NHV Nederlands Handbal Verbond (Dutch: Netherlands Handball Association)
NHV Noordzee Helikopters Vlaanderen (Dutch; Belgian helicopter transport company)
NHV Norddeutscher Handball Verband
NHV New Hungarian Voice (Vancouver Hungarian paper)
NHV Normal Healthy Volunteer (clinical trials)
NHV Nurse Home Visitor
NHV Normal Heat Value
NHV Net Heat Value (biomass)
NHV New Haven (Amtrak station code; New Haven, CT)
Yeah, not terribly helpful. Adding "steering" and scrolling down a few hits and I discovered Noise, Harshness, and Vibration. Personally I was hoping for Normal Healthy Volunteer!
Cobra Make, Engine: ERA Street Roadster #782 with 459 cu in FE KC engine, toploader, 3.31
Posts: 4,483
Not Ranked
Quote:
Originally Posted by ACHiPo
Well, NHV is a new one to me, so rather than embarass myself here, I figger'd I'd Google it...
Sorry - Noise, Harshness & Vibration. The nemesis of many automotive designers/engineers. I've got one of those flat-crank, Voodoo powered Mustangs with an 8250 rpm red line. Apparently Ford spent a ton of money for NHV measures on it since it tends to have a vibration issues due to the crank and firing order. Jeez - they even require that the oil filter be torqued to 16 - 18 lb-ft since they have had some of them come off.
Cobra Make, Engine: ERA #732, 428FE (447 CID), TKO600, Solid Flat Tappet Cam, Tons of Aluminum
Posts: 21,897
Not Ranked
Quote:
Originally Posted by DanEC
So no steering rack brace project for our viewing enjoyment this winter huh?
Naaah, I don't think it's necessary. Now, if Morris and Cobra #3170 want to fly out and kill a weekend for my benefit, I suppose I might just unlock the garage door for them.
Cobra Make, Engine: ERA #732, 428FE (447 CID), TKO600, Solid Flat Tappet Cam, Tons of Aluminum
Posts: 21,897
Not Ranked
Quote:
Originally Posted by Morris
But how long will it last ???
When I went back and checked my records, I was able to see evidence of deterioration as early as 8 years ago -- a "lucky" picture caught it. When the car was built, the bushings looked perfect from the shots I have of them. But none of those pictures show how the bushing is seated towards the rear of the frame bracket. It is possible that the driver's side bushing was not seated exactly right, which is certainly doable, and that would cause the early failure. Rest assured though that I will be monitoring the wear of the bushings.
Cobra Make, Engine: ERA 824 with 470 FE BBM street 427
Posts: 550
Not Ranked
Quote:
Originally Posted by DanEC
Sorry - Noise, Harshness & Vibration. The nemesis of many automotive designers/engineers. I've got one of those flat-crank, Voodoo powered Mustangs with an 8250 rpm red line. Apparently Ford spent a ton of money for NHV measures on it since it tends to have a vibration issues due to the crank and firing order. Jeez - they even require that the oil filter be torqued to 16 - 18 lb-ft since they have had some of them come off.
Dan,
No problem and thanks for elaborating. I still prefer "Normal Healthy Volunteer".
Cobra Make, Engine: ERA #732, 428FE (447 CID), TKO600, Solid Flat Tappet Cam, Tons of Aluminum
Posts: 21,897
Not Ranked
FWIW, this is the bad bushing that I pulled off the driver's side mount. Yes, this is what it looked like when it was on my car; meaning, my removal did not make it worse by tugging on it, ripping it, etc. When you remove the brackets and drop the rack, the bushings are pretty much just sitting there. Now, the passenger side looked to be in very nice condition, but on closer inspection, there was one small crack in it as well. If you have ERA 759 or later, you don't have this type of setup.
Cobra Make, Engine: ERA #732, 428FE (447 CID), TKO600, Solid Flat Tappet Cam, Tons of Aluminum
Posts: 21,897
Not Ranked
Quote:
Originally Posted by DanEC
Yeah - I haven't crawled under there to refresh my memory but seems it's solidly bolted to the frame now.
Changing out the steering rack, even with post-Subaru-frame-mount cars (759 and up) is still going to be a medium PITA if you have to do it. The Flaming River rack, I think, is modified by ERA to change not only the lock-to-lock value but also the inner tie rods as well. I think that's right; I know my FR rack probably took as much labor time to modify, so that it mimicked the Subaru rack, that it doubled the original price. The steering racks on the Kirkham cars are also a bit of a PITA too. It must a be a "Cobra thing."
... The steering racks on the Kirkham cars are also a bit of a PITA too. It must a be a "Cobra thing."
The challenge is ending up with minimal bumpsteer. The pivot-to-pivot distance of the rack ends must be within about 1/2" of ideal. Because I really like lots of wheel travel, I had to make the control arms pretty long. That puts the inner pivots close to the car's center-line - and that makes the rack shorter than what is available on later cars.
Cobra Make, Engine: ERA #732, 428FE (447 CID), TKO600, Solid Flat Tappet Cam, Tons of Aluminum
Posts: 21,897
Not Ranked
Quote:
Originally Posted by strictlypersonl
The challenge is ending up with minimal bumpsteer. The pivot-to-pivot distance of the rack ends must be within about 1/2" of ideal. Because I really like lots of wheel travel, I had to make the control arms pretty long. That puts the inner pivots close to the car's center-line - and that makes the rack shorter than what is available on later cars.
... and that sounds like a damn good reason to me. Thanks for the good customer service, like always.
Cobra Make, Engine: ERA Street Roadster #782 with 459 cu in FE KC engine, toploader, 3.31
Posts: 4,483
Not Ranked
Quote:
Originally Posted by strictlypersonl
The challenge is ending up with minimal bumpsteer. The pivot-to-pivot distance of the rack ends must be within about 1/2" of ideal. Because I really like lots of wheel travel, I had to make the control arms pretty long. That puts the inner pivots close to the car's center-line - and that makes the rack shorter than what is available on later cars.
You did a great job Bob. I'm always amazed at how well these cars are engineered and drive.
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