zoltan944

DR,
RIGHT ON!!!!!!!!!!!!!!!!!!! I didn't think it could get better, BUT then it did!
it went from polished to BLACK

animal8526

dr...

sorry, I havent had time to follow this development... whole Iraq thing and all... could anyone get me up to date on what years these kits will be offered on, and appx prices?

DR

Hi Tim,

Details (production version photos coming next week) and pricing are on our website www.928gt.com . Look under "Performance" and/or "New 928 Products"

animal8526

thanks dr... will check out now.

animal8526

damn! not for the OB's... what are the basic difficulties in developing SC kits for the OB? it seems to me most turbo/SC kits are developed for the 32V first and the 16V next, if at all... which seems strange, because the OB's are really the ones that need the extra hp.

what am I missing? or is it simply a bussiness thing? I mean, did someone figure out at some point that marketing high power bolt ons for the 16V's wasnt as financially sound? j/w.

SharkSkin

Tim, first off, your car is not an OB -- that term applies to CIS(K-Jet) sharks.

Maybe you're seeing more kits for the later cars because it's easier -- later cars have knock sensors, better fuel/spark systems that can compensate for the forced induction to some degree, etc.

Also, later cars have the intake ports inboard of the spark plugs, and earlier cars have the spark plugs inboard of the intake ports. Makes it more of a challenge to design an intake!

Note, I myself have not tried to construct a 928 supercharger so the previous two paragraphs are mostly conjecture and informed guessing.

animal8526

all kinds of learning for me today... so, OB doesnt apply to all pre 86 cars, before the styling of the front bumper cover and rear cover changes (and tail lights)? well, I have heard it missused then. well, I have an 79 OB by that definition too... but, for now, that poor beauty is relagated to parts duties. thanks though... I appreciate the info.

Bobarino

Looking great Tom! so does this mean i have a snowball's chance in hell of me buying Barney back from you for what i sold it for now? i sure miss him. i'm glad he's in such good hands. must be a blast to drive! say, if'n i'm ever out that direction, and i ask really, really nice, can i drive him again?

do you plan to put him on the dyno? i'd love to see the results from that. the install job looks fantastic. DR always took great care of me too.

here's a quick story you may not know about Barney. while on my way to the airport for a flight lesson, the clutch pedal went to the floor and didn't come back directly under the narrrows bridge. i thought the clutch M/C had failed. i had it towed home and replaced it, but that wasn't the problem. i figured it must be the slave cylinder so i replaced it. that wasn't the problem either. turns out it was the hose that connects two, but since it had a plastic shroud on it, i couldn'e see the huge gash in it. i tried to order on, but all the local dealers were out and so were the big three. backordered everywhere with no projected delivery date. so i took it to Williams Oil Filter and Machine Shop in Tacoma because my pop told me they carry lots of hydraulic hoses and such. they didn't have anything that matched so they cut the fittings off of the stock hose and used a piece of super heavy duty aircraft hydraulic line, cut the fittings off of it, brazed the Porsche fittings on it and Voila! a new, virtually indestructible hose. cost was only $30. install was a snap. bleeding it on the other hand..... so thats where that blue braided hose under the car came from, instead of the factory black rubber one. worthless trivia for ya.

let us know when you get him on the dyno! take care....

Bobby

SharkSkin

Tim, if you really search out the origins of the term, it was in use well before '86. Yes, it is often misused to differentiate between S4+ and earlier cars.

Take a look at your 79 and you'll see what I mean about the challenges coming up with an intake manifold. Rumor has it that DR (928gt.com) has something up his sleeve, a way to twin-screw the early cars. Maybe he will release some details at SITM this weekend, maybe not.

Carl(928motorsports.com) already has a centrufigal SC for the early cars.

animal8526

hmmm... well, after this weekend and SITM is over, perhaps someone could fill me in on what developments I missed. *sigh* next year maybe I'll be stateside for it.

I was aware that 928 motorsports had some options for my MY... I was just, and still am, always curious on what other choices are out there. thanks again dave... all input is appreciated.

Chuck Schreiber

Dave,

Looking at the Cold Start valve, wur, etc. in the front of our CIS cars, it would be tough to get the snout of a twin screw through all that without relocating all the plumbing. I'm sure DR can work it out though, especially at such a low compression ratio, bet he could turn up the PSI and make some serious HP! As you said, Carl has done a good job already.

SharkSkin

Good points Chuck, but when you look at the pizza-box construction of the Keel manifold (and, I'm assuming, the DR-Keel manifold) you'll see that a complete redesign would be called for to fit the 16V motors -- making those plumbing issues that you mention seem very minor.

hacker-pschorr

I dunno, this group seams pretty split on that. Some refer to OB's as all pre S4 cars, others pre-32 valve cars, some pre-spoiler 928's.

It's simple econmics really, your average 16V 928 is selling for $5k-$6k. There simply are not many people willing to spend an additional $5k+ to boost the older cars - to reach a level of performance that should exceed any stock 928, still not the supercar performance of a boosted S4. Same reason why you see almost no serious performance options for N/A 944's. With a factory built faster car on the market, it does not make sense to most people to modify the "slower" car. Obviousally I disagree with this since I boosted my 81 and I will add boost to my 79 track car. For parts / kit suppliers, the market doesn't look big enought to justify the R&D for a kit.

animal8526

see, there we go. I guess I just lack that side ability to think rationally. shoulda figured... 15k or so on a car I payed less than 4k to start... and still no boost. damn... thats why I dont think rationally. it makes me sad... well... when I hit that 25k point and she is boosted, fully restored, and just the way I want, I will feel better. as long as I dont start to think rationally. lol

zoltan944

Tim Also check out the SITM pictures stickied above in the forum. There are a couple more shots of the SC kit, and a small video from big dave revving a car with it installed! I think its DRs car...