H2

Which forced induction system/brand/approach is best for 928s? More specifically, which is more cost efficient? Easiest to install? Best build quality? Which kits are best engineered? Relative costs? Best performance? Most reliable? Best install instructions? What kind of install time is required? Has the initial kit shakeout now occured and have the kits matured enough to be simple enough for a mechanical moron to install w/o blowing up his garage or toasting his/her engine? What's it cost for an experienced mechanic to install the kit? What shop has the most experience/success?

Is it too early to learn from the mistakes of the early adopters or are we still in the learning mode? I'm impressed by what I'm seeing but I wouldn't want to jump in until the water is right. When I read of all the issues related to an install, I keep thinking that's a project for retirement.

People like Shane et al know which end of a screwdriver to hold and that kind of experience makes a difference. BTW, in Spanish, a "screwdriver" is called an "un-screwdriver"...but that's just as correct as the English term since fully half of it's function is to un-screw. I'm not sure how this last bit is related to "twin screw" but I thought I'd toss that in since my mind is still trying to deal with an energy drink. The day's starting out bad. Back to my cubicle.

Harvey
Un-screwed in a 928

AO

Harvey-
The answer is, "It depends." I suggest you get a copy of Corky Bell's book titled "Supercharged: Design, Testing, and Installation of Supercharger Systems." I just got a copy last saturday compliments of Chaadster's younger brother . It has way too much information, but if you really want to learn the differences between the various setups, that's the best source I can think of.
You know my choice in kits. If I had to do it again, I'd make the same choice. Yes, I've had a few teething pains, but that was expected because I was an early adopter. Tim's kit is as proven as I think any kit could get. It's pretty bullet proof, but personally (and Tim & I have had discussions on this so I'm not bashing him or his kit by saying this) I don't like the way his kit looks. To me it still looks like someone took a bunch of parts and made them fit. I'm not say that's what Tim did as I know he spent a lot of time and money on developing his kit. Unfortunately, I think there's only so much you can do with a CF setup to make it look clean. Kind of a form follows function thing. I think Tim's kit is leaps better than the original FAST kit offered some time back.

With the TS kit from DR, DR took Andy's kit and made it look beautiful! I have received tons of compliments on how clean the install is - and that was one of my top priorities. I had to have it look like it came from the factory that way.

Performance is pretty close - others may disagree, but how fast is fast enough? We may have a bit of a shootin' match this weekend just to find out, but as Tony taught me and I have now mastered - there will always be someone faster.

So again, to answer your questions... it depends.

Shane

Harvey, wait! Good times are coming for our MY 928s. Mark R. has developed his turbo kit on our model (5speeds anyway), and John Speake is working on a sharktuner for our years as well. With both of those combined we will be golden!!

I haven't seen DR's set up on an '85-86.5 yet. But that would be another option. Other than the fast kits, I haven't seen any Murf kits on 85-86.5 either, although it should be quite doable.

PorKen

For now, I'm going to bump up the cam timing a bit, which will also advance the ignition timing, instead of putting in a chip. (Hmmm...I need to look if someone put in a chip already!)

AO

Sorry, I didn't see you have an 85. I agree... wait. The stuff you need to make it right is coming. Once that's available, it'll be a matter of the stuff I talk about above.

John Speake

Harvey - you will need a bomb shelter, rather than a cubicle if you start another "forced induction" war :-)

AO

Sorry... I take that back... Mark H. (Sharks on rennlist) has an 86.5 and is running a non-intercooled Jag/eaton blower with great results... you may want to drop him a line to see what if any fueling issues he may have had.

Jim R.

Harvey,

I won't start a pissing match on this one. The time is definitely here to go FI if that is what you want to try. I don't have a TS or turbo, so no comment on those. (cue HK "SC's suck, turbos rule")

The Murf kit in stage 1 form is an easy install, and would fit well with the wide 85-86 intake. No intake removal required if that is what has you nervous. I would say it is a start in the AM, drive it later that afternoon project. My stage 2 has been pretty much set it and forget it simple. The stage 2 is a more involved install and I don't think Tim has a standard intercooler for those model years yet.

You can't beat the change the boost adds to the car regardless of source. Still drives like a 928, but has a serious kick in the tail when you get your foot into it.

Jim

AO

Jim- Correct me if I'm wrong, but I didn't think Tim's (Stage 1) kit worked with the 85's. Am I wrong?

hacker-pschorr

Tim has an air / water intercooler designed around the 85-86 manifold in his shop - fits in where the air box goes. Real trick setup (similar to mine). I don't think he's really gone after this market yet, swamped with S4's. Everything is there if someone wanted to pull the trigger on an early 32V Murf setup.

Jim R.

Andrew, I think Hacker just answered that one for both of us.

Jim

AO

So, I guess the timing is right! As long as you can turn a wrench, I think you can do it without much issue. You'd definately get a ton of support from the boost crowd.

hacker-pschorr

Harvey,
The entire Murf Crew + Andrew will be at Tim's house on Saturday. Z, Lag, Todd, Myself etc..
By Saturday night you will have a supercharged 928.

I'm willing to bet you can con this group into doing the install for beer


It's only 1,800 miles - you might want to leave now.

AO

I'd do it!

hacker-pschorr

Don't worry Harvey, we'll give Andrew some blunt shiny object to keep him occupied.