supra5677
Pro
Posts: 1279
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posted January 20, 2006 09:22 AM
1375 kit
How many reliable miles can you get out of a 1375 kit? Does anybody know
Thanks,
supra
   
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trenace
Needs a job
Posts: 3056
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posted January 20, 2006 10:03 AM
What is your definition of reliable?
99% chance of making so many miles without blowing up?
95% chance?
90% chance?
50% chance?
Sometimes making it, there's a few instances of it?
Some guys, because 1 guy out of a bunch got his motor to go so many miles, will cite that figure as what it's "reliable" for. Others, by reliable, mean you can be highly confident of no failure in the interval in question.
If the person answering your question isn't on the same page as you on what's being asked, there could be a massive communication gap.
Also, prediction: expected all the failures to be attributed, by those who didn't have failure, to builder error. (Of course some actually is, but that large a number? How do others who weren't there know that confidently?)
Next aspect to clarify -- are you wanting to get this reliability (whatever you mean by that) for this many miles, while not only increasing piston speed by keeping redline same as stock but having longer stroke, but extending the redline as well? Should those giving guesstimates read it in that light?
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supra5677
Pro
Posts: 1279
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posted January 20, 2006 10:52 AM
Thanks trenace:
Can you get 40,000 street miles with occasional roll on racing with the 1375 kit?
Thanks,
supra
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trenace
Needs a job
Posts: 3056
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posted January 20, 2006 03:48 PM
 Edited By: trenace on 20 Jan 2006 18:27
I hope it doesn't appear I'm trying to give you a hard time, because it's exactly the opposite -- I want to make sure that you get an answer that it's clear all around what's being asked and what's being said.
This has been an issue I've put a lot of thought into and looked for every report I could find myself.
On the question "can you," you may get a "yes" answer.
On the question "how many guys out of how many get the 40,000 miles, that is, how likely is it shown to be?" that I am guessing would be a totally different matter.
It seems that out of all the guys that have built stroker Twelves, only 1 or 2 have ever gotten that kind of mileage, whereas quite a lot have had early failures (that those without failures blame on the builder), and the remainder don't have a lot of miles so aren't evidence either way regarding the likelihood of reaching that goal.
Anyhow, hopefully answers will follow both on whether it's possible, and then maybe evidence as to how likely one ought to expect it to be, based on the outcomes of engines making it and not. A very informative thread if that happens!
Also the last clarification would be, what's the max rpm going to be as the general rule? 11K? Stock? Extending past stock redline? Big factor.
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GUNNER
Needs a life
Posts: 5778
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posted January 20, 2006 05:10 PM
quote:
Thanks trenace:
Can you get 40,000 street miles with occasional roll on racing with the 1375 kit?
Thanks,
supra
From what I've read and been told I doubt you'll see that kind of mileage. There is plenty of guys on here that have stroker motors that may speak up and give netter ideas of what you can expect. If I could get 10,000 miles I would be happy. That would be two years worth of riding for me and then a refresh.40K would be asking a lot I would think. Post this over in the drag forum. Lots of guys have strokers there.
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tuusinii
Pro
Posts: 1031
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posted January 21, 2006 04:02 AM
Never have been building a stroker but I'd say that one big factor when regarding strokers that when they come up on this forum they've been mostly for dragracers. And under the quater mile it takes a very many passes to get to the 40000miles. It's the same thing as on normal engine some get 150000miles without rebuild and someone have the engine blow after 10000miles. It depends how You do the maintenance and how You ride.
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