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General Category => General Discussion => Topic started by: pete roper on July 30, 2019, 10:47:41 PM

Title: You'd think they would of learnt their lesson......
Post by: pete roper on July 30, 2019, 10:47:41 PM

Tappets from my 2003 Hydro.

(https://live.staticflickr.com/65535/48419574302_342a827d57_z.jpg)

Although the cause of the failures with the 8V's in 2008 was different after the fiasco with the Hydro you'd I'd expected them to get their shit together for their next major engine project!

Mind you I'd heard that the entire design staff at Mandello were sacked after the Hydro disaster so the mob that took over at Pontadera/Noale or wherever probably started from scratch.

Pete

Title: Re: You'd think they would of learnt their lesson......
Post by: pete mcgee on July 31, 2019, 12:59:41 AM

So what is the fix for this?
Go back to the old style followers and manual tappets?
Went through Bunendore last week on the way to the apollo rally, you guys really need to pay your power bill, its cold.
No wonder I moved to QLD after 10 years riding around Canberra...

Title: Re: You'd think they would of learnt their lesson......
Post by: pete roper on July 31, 2019, 01:20:02 AM

A series of recalls and fixes. They finally got it right with a modified cam and lightening the valve train and springs.

You should of dropped in if you were coming through.

Pete

Title: Re: You'd think they would of learnt their lesson......
Post by: s1120 on July 31, 2019, 07:03:05 AM

You know its amazing they had this problem.. Its not like a flat hydraulic tappet is new tech.. They have been around for a VARY long time!!! 

Title: Re: You'd think they would of learnt their lesson......
Post by: Two Checks on July 31, 2019, 08:38:51 AM

Heck, the na$car boys used flat lifters until a couple years ago. They had crazy cam profiles and spun the things to 9k rpm all day long with no problems.
It ain't rocket science.

Title: Re: You'd think they would of learnt their lesson......
Post by: guzzisteve on July 31, 2019, 08:56:26 AM

Before that it was the V65 4V cam, now who's the V85 Guinea Pigs for the new crap. ALL GOOD computer generated stuff. No need for testing. Just keep a warranty going.

Title: Re: You'd think they would of learnt their lesson......
Post by: Wayne Orwig on July 31, 2019, 09:11:25 AM

Quote from: pete roper on July 30, 2019, 10:47:41 PM

Tappets from my 2003 Hydro.

(https://live.staticflickr.com/65535/48419574302_342a827d57_z.jpg)

Those are good for another 10,000 miles......  :evil:

Title: Re: You'd think they would of learnt their lesson......
Post by: Chuck in Indiana on July 31, 2019, 02:53:45 PM

^^^^^
<suits talking> Watsa the problem? They made it past warranty.. :evil:

Title: Re: You'd think they would of learnt their lesson......
Post by: Rough Edge racing on July 31, 2019, 02:55:01 PM

Quote from: Two Checks on July 31, 2019, 08:38:51 AM

Heck, the na$car boys used flat lifters until a couple years ago. They had crazy cam profiles and spun the things to 9k rpm all day long with no problems.
It ain't rocket science.

 This was written by Reher- Morrison racing engines in 2013 before roller tappets were allowed in Cup Nascar...

     

Quote

I know that some racers have run flat tappet cams successfully for years, and that NASCAR Nextel Cup teams are required by the rules to use flat tappets. The former are very fortunate, while the latter spend mountains of money on special cam cores made from exotic alloys, hardened and inlaid lobe faces, oversize zero-radius lifters, camshaft oilers and major block modifications to eke out 500 miles of racing from a flat tappet cam before it self-destructs. Flat tappets don’t save money for NASCAR teams – in fact, the total cost far exceeds the price of a roller cam and lifters. Moreover, the highly specialized components and machining procedures used in NASCAR Nextel Cup engines have virtually nothing in common with the flat tappet cams listed in retail catalogs.