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beepbeep: - Keep the OEM wastegate, it's better than Tial.
With most people going to Tial over the stock wastegate why do you prefer the stock one.
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Harold '79 930/DP935 (sold) '68 VW 3.3 Turbo Crewcab |
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It's big, high quality, rebuildable and free ;-)
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Thank you for your time, |
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I thought you couldn't get new diaphragms for the stock wastegate.
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2014 Cayman S (track rat w/GT4 suspension) 1979 930 (475 rwhp at 0.95 bar) |
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Don't know about horsepower--probably just a little. But Holcombe seemed to think it did good things for off boost response at low rpms. I didn't have much to compare it to, but he did.
I did it because we had to split the case anyway because my crank needed replacement. Not sure it would be worth it if that's not where you are. |
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Automotive Monomaniac
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Image Auto, Inc. 913-310-9927
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2018 - Porsche 911 Carrera 7MT / 2018 - Porsche Macan 7DCT / 1993 - Cadillac Allante / 2023 - RAM TRX (on order) |
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What beepbeep said with a few more suggestions, I am nearing the end of a similar build shown below, bin the schnell headers if you can, since I already had the B&B Marco's or Holcombe's headers did not make it on there, don't waste your money on a G50/50 conversion as I did all told $13,258.60 for the trans and hardware alone from Patrick Motorsports, no clutch yet.
The guys that are making really big hp on this forum Mark Shock, David Knebes and a bunch of others out there that may choose to remain un-named but have communicated the details of their various builds to me both here and on Rennlist (do a search) Derek Cooper (Imagine Auto built), two of the three mentioned use a ball bearing turbo with great results. I think you will find that gearing and suspension is where you will find you biggest gains not 700hp(I hope this is a flywheel number) for the money go buy yourself someone else's completed build or a new GT3. I started with a $40K low mileage 930 outfitted it with all the usual upgrades and a McIntosh sound system (my car is for fun not a track rat or daily driver, leisure only) and so far into this build I am over 40k since Feburary and not done yet. I had a thing for the original 935 race cars so I had my heart set on building a single turbo monster. Would I do it again? probably but unlikely. Project Type 930 Engine Stock crank, case, oil pump, etc. Case boat tailed Pauter rods 3.4L 7.5:1 pistons Cylinders and heads Nirostat fire rings 930 heads ported with stock valve sizes, but smaller 993 valve stem diameter on inlet valve Valves to be back cut for flow improvements Twin plug with Bosch silver plugs W4CS Imagine auto valve springs and titanium retainers GT2 Evo custom grind cams Carrera 3.2 liter intake manifold Stock fuel rails, regulator, damper, etc, stock fuel pressure Siemens 80lb/hr injectors Full bay intercooler (AC Retained 993tt condenser) I still need an Intercooler B&B Headers (retained) Fabspeed Dual out exhaust Imagine Auto’s HF2 Turbo Tial BOV, Wastegate MoTeC M600 M & W double ended coil M & W CDI controller HKS EVC 5 boost controller Transmission G50/50 Patrick Motorsports with Guard Chromoly LSD Suspension I currently have upgraded torsion bars and custom valved Bilsteins. I will consider any recommendations for street with mild track applications? Braking and Running Gear The car presently has Big Reds all around and 17” Ruf classics (17x8.5 and 17x 10 with Michelin Pilot Sport Cups).
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Lincoln Phillip 87 930 Motec EFI M600 G50/50 TurboKrafted Hell Hound. Jeep, Chrysler, Dodge, Ram, SRT & AEV Dealer pm me for your Mopar needs. "the 930 is THE CAR that started my PORSCHE love affair..." Magnus Walker |
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On second thoughts just buy Bruce's car.
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Lincoln Phillip 87 930 Motec EFI M600 G50/50 TurboKrafted Hell Hound. Jeep, Chrysler, Dodge, Ram, SRT & AEV Dealer pm me for your Mopar needs. "the 930 is THE CAR that started my PORSCHE love affair..." Magnus Walker |
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I have a 1994 3.6 Turbo motor that was built by Paul Schwartz. It has Pauter rods, all the happy bolts retainers and hardware, 54mm intake valves (instead of the stock 49mm ones), twin plugged heads, happy cams blah blah blah...., not sure if it is 38. or 3.6 displacement. I bought the longblock from the guy who in the middle of switching to motec switched to a totally different race class instead. Others bought the intake and exhaust, I bought the everything else. Not sure what to do. Had it a few years and haven't started buying parts yet. Not a good time financially for a big committment. Any inexpensive suggestions? I would also consider selling it.
Thanks, Vince vince@gtmotorsports.us Last edited by vtsjr; 08-08-2006 at 04:04 AM.. |
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+ lurking - contributing
Join Date: Dec 2005
Location: Atlanta, Georgia
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Don't forget to upgrade the clutch.
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87 930 96 BMW M3 Coupe 89 951 08 Astra H Peugeot moped |
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77’ 911S |
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Crotchety Old Bastard
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There is more to the story.
You can't run 1.1bar of boost on the track IF YOUR FUEL AND IGNITION SYSTEMS ARE NOT UP TO THE TASK. You cannot allow the fuel curve to lean out at any point and you cannot allow detonation at any point. Reliability and longevity always suffer with more boost. You have to establish the level you are willing to accept. If your motor unexpectedly blows up on the track you don't know everything about engines, your still learning.
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RarlyL8 Motorsports / M&K Exhaust - 911/930 Exhaust Systems, Turbos, TiAL, CIS Mods/Rebuilds '78 911SC Widebody, 930 engine, 915 Tranny, K27, SC Cams, RL8 Headers & GT3 Muffler. 350whp @ 0.75bar Brian B. (256)536-9977 Service@MKExhaust Brian@RarlyL8 |
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I haven't seen any mention of cost in this thread. Are all 930 owners rich (in which case I missed my share) or does the car take first precedence for money?
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C.H. Boost Addiction - honestly, I have it under control 1989 911 Turbo Cabriolet Mods include: Kokeln IC, GHL Headers, Hooligan muffler, Modified K27 7200, BL WUR, LC-1 & XD-16, Bilstein Sports (4), TRG sway bars, Oversize torsion bars, Strut brace |
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Schnele--
This is priceless: "Would I do it again? probably but unlikely." That perfectly sums up this sort of obsession. I'm in exactly the same camp ![]() |
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I've got a friend at work with a 996. When I see him, his first question is "are you finished yet?" The next comment is: " you know you could buy a 996 for what you have in the 930." I tell him he doesn't get it. He didn't get a ride in it before the rebuild, so he'll be extra surprised when he does get a ride. There's just no way to adequetely describe the feeling when the boost comes on in heavily modded single turbo 930.
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2014 Cayman S (track rat w/GT4 suspension) 1979 930 (475 rwhp at 0.95 bar) |
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hey guys, Im running the methanol with water, a 50/50 mix. I found out today my case had been blow up before! A rod went through it and whoever messed with it last put all the peices back with jb weld. We also found out my engine was being held by one bolt and my headers were so loose you could pull them apart with your hands. Im happy I'm doing this work to the car. Everyday after work I go by and see him and he shows me the progress. It feels alot better to just drop the car off and come back a few weeks later. Someone suggested upgrading the clutch, I found a clutch on ebay item number 280015472003 that looks to be a good upgrade. Im trying to cut down a little on expenses as I have already hit the $15k mark. Anyone had experience with this clutch? I will let you guys know how things are going.
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The description sounds good, but I thought the Spec Stage 1 was not a real high horsepower/torque app, and that the Stage 3 is what you need at the hp levels you want. Especially if you really want 700hp to the ground....
Dunno, though. No direct experience with Spec. My clutch is a 935 clutch. Hard to modulate and pretty stiff, but holds like a mother... |
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cycling has-been
Join Date: Sep 2004
Location: Jersey Shore
Posts: 7,238
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ditto on the oem clutches for reliability
I have an rsr clutch package in mine probably the only mod I where I would opt to go a little more conservative
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73 911T MFI, 76 912E, 77 Turbo Carrera |
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930zx -
Sounds like a great car in the works. No experience with the methanol but personally I think it's overkill. Unless you're going for absolute HP or bragging rights, and not drivability on street or track of course. Schnele said it well. The gearing and suspension are crucial to applying all that HP. Anything +/- 500 hp on these 2WD, non-PASM, non-ABS, non-anything cars is a handful. A terrifically FUN handful but something to respect. Mine is somewhat similar, but twin turbo, twin plug, twin MSD's, flame ringed, pauter rods, Ti spring retainers, blah blah EFI, G50/50, revalved RSR coil overs, big reds, reinforced ARB mounts, ERP rear spring plate, monoballs ..... built to handle 1.4, but I max it at 1.25 on the track with race gas. It's running extra rich/fat for safety and financial reasons (not wanting to melt things) so it's only doing 485 rw, probably ~570 crank. I could get an optimal AFR ratio for even more HP, but really why. The taller-geared G50/50 5-sp works really well on bigger tracks (Watkins Glen). If I were only going to track it I might get closer ratio gears, but I play with mine on the street as well. Oh, I have my slightly used 935 clutch and Protomotive TOB, if you want to keep costs down. Email me if interested. It grabs and holds like a mutha but works well with high HP. I went with a Sachs sport clutch for better user interface and have been quite pleased (no slipping either). Good luck with yours! Glenn glenn@executive-focus.com |
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