I'm slowly getting my 3 liter ready for install......who's got the best price on the tensioner upgrade?
vertex.com $400
Ask this question over at the 911 bird board.
IIRC there are a couple different suppliers of these, one is gud & one is not so good....but I don't remember the details.
In this case, cheep is not necessarly better.
Update the arms also, They are wider and have bushings in them. More$$
vertex complete and good price. '80 and on already has updated arms.
Forget throwing your money away on the Carrera tensioners. Just update the arms and idler parts, add tensioner guards, and rebuild your late version conventional tensioners. Cost you about 50 bucks above and beyond the updated stuff, which you should do anyway. Beats spending several hundred bucks for something that's NOT an "upgrade".
The Cap'n
I couldn't agree more with the crust-meister.
tensioner guards (to keep them from collapsing in case of a failure) and good arms and you are set.
The pelican 911 board is full of people who upgraded to the carrera tensioners, only to have them fail soon after.
IMO it isn't an upgrade at all and will not put the carrera tensioners in my engine, no matter what B.A. says
QUOTE (Sammy @ Sep 16 2005, 11:15 AM) |
I couldn't agree more with the crust-meister. tensioner guards (to keep them from collapsing in case of a failure) and good arms and you are set. The pelican 911 board is full of people who upgraded to the carrera tensioners, only to have them fail soon after. IMO it isn't an upgrade at all and will not put the carrera tensioners in my engine, no matter what B.A. says |
I've read all the Pelican posts on the chain tensioner debate and I'm well aware of the differences of opinion. I guess I had sort of decided to do it but I'm eager to be persuaded otherwise....it sure would save some dough. More opinions encouraged Captn? Jeff? JP? Sammy?
do the tensioner upgrade, and while you in there install new chains, new ramps, new arms, new sprockets.
and modify the carrera tensioners such that they have there own fail safes (its really quite easy)
and POOF, you have the latest bullet proof system
If your going through the expense of rebuilding a 911 engine.. you should do it right once.. spend the coin get the new parts, assemble carefully, and have years of enjoyment
or enjoy till you get the urge to build in some more power
Well, we all agree that the sprocket arm needs to be up-dated.
Many believe that that alone caused the tensioners to fail.
Also look carefully at the shaft on which it rides. They wear unevenly causing a step in the shaft which can bind movement. My 2.7 shafts were severly stepped which meant replacement with aluminum chain boxes......the mag jobbies are getting old and most are shot, me thinks...the pressed in shafts are not as well anchored in the mag boxes. I have a couple aluminum jobbies( for cheep) if you have the need.
As to the tens, you're on your own. You've read the stuff. The non oil fed work and did so for a long time. New ones are fairly cheep by comparison to the oil fed. At a minimum, get new ones.
I would not under any circumstances use them fucked up locks/guards....what ever.
edit: I'm talking about the external guards, not those Tim is talking about.
QUOTE |
If your going through the expense of rebuilding a 911 engine |
You got a new set of hydraulics on the 2.4 swap em ,
QUOTE (TimT @ Sep 17 2005, 01:07 PM) |
do the tensioner upgrade, and while you in there install new chains, new ramps, new arms, new sprockets. and modify the carrera tensioners such that they have there own fail safes (its really quite easy) and POOF, you have the latest bullet proof system If your going through the expense of rebuilding a 911 engine.. you should do it right once.. spend the coin get the new parts, assemble carefully, and have years of enjoyment or enjoy till you get the urge to build in some more power |
QUOTE (J P Stein @ Sep 17 2005, 01:08 PM) |
I would not under any circumstances use them fucked up locks/guards....what ever. edit: I'm talking about the external guards, not those Tim is talking about. |
QUOTE |
Lightening the car by lightening the driver's wallet is NOT a valid point. The Cap'n |
QUOTE |
I used to use 912 valve spring retainers until the guards came on the market |
QUOTE (Cap'n Krusty @ Sep 17 2005, 01:35 PM) | ||
What's wrong with the external guards? I used to use 912 valve spring retainers until the guards came on the market. Never seen one fail in an original installation. The Cap'n |
for me it's safety collars.
there are way more posts on Pelican 911 board about new carrera tensioners failing than there are about 25 year old stock tensioners failing. I go by what i see and not what BA says, unless he wants to pay for them and guaranty them. Even then I would have second thoughts.
QUOTE |
Explain in a couple of paragraphs words how the oil fed tensioners are an "upgrade". Please present a convincing argument to support your contentions |
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