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Surcharger kit recommendation

 
Old 09-22-2010, 10:50 AM
  #16  
AO
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Here are pics of the 928 Specialists (aka DR's kit) and the Murf Stage III kit.

928 Speciailsts kit:






Murf Kit:



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Old 09-22-2010, 10:52 AM
  #17  
SeanR
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I agree that the DR kit is a work of art. Wish he'd produce more of them.
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Old 09-22-2010, 10:55 AM
  #18  
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Originally Posted by ptuomov View Post
What are you basing your information about limited support on? I think you are making up stuff. Have you bought something from John Kuhn and not received support? Perhaps I misunderstood what you wrote there.

Definition of a "kit" is that parts are built on jigs and not in the car. By that definition, John's kit is a kit. In particular, the hardest to fabricate hot side parts are built on a jig and I believe that he's sold a number of those hot-side part sets to people.

The twin turbo kit is more involved and more expensive than the supercharger kits. For someone who's built cars before, the installation is feasible. I wouldn't try it as my first project. This is based on having one of those turbo kits and talking to people who have superchargers installed (i.e., not made up stuff).

Some indication of the effort is that John charged me I think $1500 for the installation of the basic system.

Some indication of the total cost is that the extra 100hp that a turbo kit gets over a supercharger kit on an otherwise stock motor about doubles the cost in round numbers. Because of this, it's clear that most people who want to hot rod their cars should probably get a supercharger kit.
The "limited support" comment was based on there only being 2 kits out there - not a dig on John. Murf has 60+ kits sold. You'll see it when someone has a question regarding their install, that all the current owners will help with support. The install base, has a lot to do with the amount of available support. I can see now that did not come out in my post. No harm was meant by it.
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Old 09-22-2010, 11:00 AM
  #19  
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Actually, the more I think of it, John has been the only one to do the actual installation/and initial tuning of his kits (since you paid him to do yours). I suppose if the OP wanted to, he could ship his car from NZ to the US for John to do the installation. Not sure how the EPA/DOT would look upon that.
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Old 09-22-2010, 11:08 AM
  #20  
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Originally Posted by Andrew Olson View Post
Actually, the more I think of it, John has been the only one to do the actual installation/and initial tuning of his kits (since you paid him to do yours). I suppose if the OP wanted to, he could ship his car from NZ to the US for John to do the installation. Not sure how the EPA/DOT would look upon that.
If all the paperwork is done right, this wouldn't be a problem. People bring in race cars for limited amount of time fairly often.
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Old 09-22-2010, 01:07 PM
  #21  
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Originally Posted by Andrew Olson View Post
The "limited support" comment was based on there only being 2 kits out there - not a dig on John. Murf has 60+ kits sold. You'll see it when someone has a question regarding their install, that all the current owners will help with support. The install base, has a lot to do with the amount of available support. I can see now that did not come out in my post. No harm was meant by it.
John's support is at a very high level compared to anything I've seen or heard in the aftermarket performance industry. It's so high that in fact he is getting paid to do debugging, support, and tuning for a number of supercharger and turbo cars not using his kits.

You are correct that the community support with a system that has 60 installations is going to be better than with a system that has 2 installations. That's by the way why I recommended going with the centrifugal kit that is most mature, which I believe is the Murf928 kit.

Originally Posted by Andrew Olson View Post
Actually, the more I think of it, John has been the only one to do the actual installation/and initial tuning of his kits (since you paid him to do yours). I suppose if the OP wanted to, he could ship his car from NZ to the US for John to do the installation. Not sure how the EPA/DOT would look upon that.
For the record, I don't think you are right that the only way for an NZ person to get John's kit on his car is to ship the car in the US. That's ridiculous. You'll give him a call and ask him to ship you a kit. You'll get a lot of phone and email support and need a good set of tools and some experience for that to work out, though. And it'll cost you money.

John's standard kit comes with a chip. You can plug it on. I had a lot different customizations done and I am willing to run the car at a higher level. Hence, the custom tuning efforts. But just like other supercharger kits, you'll get a chip and a map with John's turbo base kit. There's no difference.
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Old 09-22-2010, 01:07 PM
  #22  
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Originally Posted by Andrew Olson View Post
Not sure how the EPA/DOT would look upon that.
Not sure how EPA/DOT would look upon your car, or mine... ;-)
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Old 09-22-2010, 01:23 PM
  #23  
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I have personally seen how all of the forced induction systems are supported after the sale by the people selling them. From my personal experience, John Kuhn is head and shoulders above the rest in the support category. Tuomo is correct, John Kuhn has tuned and corrected design flaws in a few forced induction systems that he did not design or build. I won't go into specific names here but there have been a few people who bought kits from the big players in the 928 boost world that have not been satisfied and have contracted John to fix the issues with their cars.

That being said, I don't believe John offers a RHD system at this time. If I were to be in NZ and want a boosted 928, I would probably go with the Murph simply because it's available now.
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Old 09-22-2010, 09:01 PM
  #24  
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I can't speak to the long gevity, or long term support, but I can speak first hand to Tim Murphy and his kit. I looked at all the available options...Carl's, Dave Roberts( I ordered this kit but they're soooo... far out(I waited 6 months...)), Tim has more rigs in service than anyone (turbo or sc). All the pricing is the same: $8,000.00 US for the same level of performance (give or take $500.00) for the SC kits.

Tim called and E-mailed back every time Pre-purchase. It took a while to get the kit, but my car is not his regular build. He took my payments in installations. These were progress payments more than anything, as he completed X,Y, andZ $$$ was paid. I recieved the kit when he told me I would. When I was ready to install we talked on the phone several times. As I got knee deep in to it he took every call and was extremely generous with his time, and very patient. His kit had every part, and required very little "interpretation". I did have to purchase a few bits too get things done, but most of these were WYIT stuff.
I just want too say... Tim is the man! Everytime (all 6) I've fired that Bitch up and hit the street, I got a big sh#t eatin grin. And every time I can squawk the tires in 3rd gear... I just feel... 12 year old kid good! I'm probably not the guy you want too listen to, too much of that new car smell thing. The guys you should listen to are the ones who installed two, four, or five years ago. Everyone who wrote that check, BIG bucks to me, that's the ultimate endorsement. If, in the future, I become disenchanted... I'll certainly speak my mind. This was a huge deal to me, a once in a lifetime (read: my wife said sure, go ahead!) thing. Tim made it easy and it worked just like he said. What else could you want? thanks Brian
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Old 09-22-2010, 10:39 PM
  #25  
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my question is to the masses out there (LEADASS included as you are recently blown), the MURF Stage III into a 90 GT?

How does a stick react vs automatic trannsmission when boosted?

Being from Ontario(Niagara region) would it be better to bring my car to Tim's shop for install or install myself. Tweeking during and/or after install?

I've never been in a boosted 928. I might be able to swing a ride in Imre's or Teds car. Untill I jump in and do mine, i guess it's as close as I'll get. Come spring we are building a garage - 20x24-, then if there is any money left goes toward a Murf Stage 3 fund.
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Old 09-22-2010, 10:45 PM
  #26  
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Steve, c'mon man, what are you gonna do with a supercharger?
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Old 09-23-2010, 12:29 AM
  #27  
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Originally Posted by robot808 View Post
Steve, c'mon man, what are you gonna do with a supercharger?
Continue to tell us to wait up for him.
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Old 09-23-2010, 12:32 AM
  #28  
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Originally Posted by why try View Post
my question is to the masses out there (LEADASS included as you are recently blown), the MURF Stage III into a 90 GT?

How does a stick react vs automatic trannsmission when boosted?

Being from Ontario(Niagara region) would it be better to bring my car to Tim's shop for install or install myself. Tweeking during and/or after install?

I've never been in a boosted 928. I might be able to swing a ride in Imre's or Teds car. Untill I jump in and do mine, i guess it's as close as I'll get. Come spring we are building a garage - 20x24-, then if there is any money left goes toward a Murf Stage 3 fund.
You will need to upgrade the clutch no matter what kit you go with. The GT clutch is barely enough for the stock engine. There are plenty of options out there at different price points.
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Old 09-23-2010, 12:38 AM
  #29  
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Originally Posted by Andrew Olson View Post
Continue to tell us to wait up for him.


You guys got so far ahead of me going to SITM i could no longer even hear ya, I was like .

A old hillbilly just could not keep up.
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Old 09-23-2010, 01:11 AM
  #30  
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Originally Posted by Hilton View Post
The most (only?) complete kit is the Murf one from Tim Murphy by all accounts. Everything from hardware to ecu chips for the stage III.

If I were looking into a Supercharger kit his would be the one I'd go for. I know a couple of the UK guys have used it too, so it can fit on RHD cars too like your 90 S4.
Besides the ones in the UK, I know that there have been at least one or two Murf kits installed in Australia/New Zealand as well.

Originally Posted by why try View Post
my question is to the masses out there (LEADASS included as you are recently blown), the MURF Stage III into a 90 GT?
Two of the earliest Murf kits purchased and installed were on GTs. Here's a video of one of them the dyno.

http://video.google.com/videoplay?do...8267157&hl=en#

Originally Posted by why try View Post
How does a stick react vs automatic trannsmission when boosted?
The stick vs automatic thing is a personal decision, and there are happy owners of boosted 928s in both camps. If you're a 5-speed owner, I'd say you'll probably need a little more time to adjust to driving the car after a stage-3 kit is installed than an automatic owner would. The automatic owner can just floor it, hang on, and try to keep the car pointed straight. The 5-speed owner's going to have to learn to do things quicker than he's used to, in addition to that trying to keep the car pointed straight. Expect to hit the rev limiter the first few times you floor the gas pedal if you've got a 5-speed, since you're going to see redline a lot sooner than you're used to, and you're going to be busy watching where you're going when you do.

Originally Posted by why try View Post
Being from Ontario(Niagara region) would it be better to bring my car to Tim's shop for install or install myself. Tweeking during and/or after install?
Both the stage-1 and stage-2 Murf kits are designed to be able to be installed by the owner, but having it installed at Tim's is an option that some customers have chosen. Some people with supercharger setups other than those sold by Murf, as well as some stroker motor owners, have wanted to bring or ship their cars for tuning, so while that's an option that might be available as well, it's something that's really not a requirment with the Murf kits.
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