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Crotchety Old Bastard
 
RarlyL8's Avatar
 
Join Date: Jan 2000
Location: Huntsville, AL
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That's awsome!
A buddy has modded his turbo engine and is now complaining that the front end is too light in ALL the gears. Headlights in the sky.
Are you having that problem?
How can you keep the rear end from squatting too much and still have a good ride?
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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
Old 11-29-2006, 07:12 PM
  Pelican Parts Technical Article Directory    Reply With Quote #21 (permalink)
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Quote:
Originally posted by RarlyL8
Headlights in the sky.
LOL! Yes, I have the exact same problem... front end gets very light and it looks like your launching at a 30 degree angle.

Mind you, I'm still running OEM Carrera torsion bars (with KONI adjustables), which I think are too soft for the capabilities of this car. I need stiffer torsions, especially in the rear

Would love to do a rear coil-over conversion, but this is a street car, so I may just upgrade the torsions instead
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Merv
'89 911 Turbo Cab
Protomotive MAP ECU, Twin Plugged Heads, GT2-EVO CAMs, 3.3L fully finned P&C's, ARP fasteners, C2T head gaskets, Titanium Retainers, Turbo spec valves, springs & guides, 964 splash valves, GT35R BB turbo, GSF Stainless Headers, Magnaflow Exhaust, Full bay Intercooler, TiAL 46mm w/gate, TiAL 50mm BOV, Apexi AVC-R EBC, SPEC Stage3+ Clutch kit, Crane CDI Ignition
Old 11-29-2006, 07:28 PM
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Crotchety Old Bastard
 
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It is common for hi-po 930s to run 30mm bars out back. Mine are 28mm and they're not big enough for my mildly modded engine. My concern was ride comfort when I installed the 28s. I don't want to get into annual kidney transplants.
The next thing I am going to try are adjustable shocks. We'll see how that goes.
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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
Old 11-30-2006, 09:17 AM
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nice one Merv! just one question-is 1.25 bar safe for these engines? im assuming that 1.25 is just for them short blats?
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Andy

1980 SC soon to be big hp 3.3t powered 73RSR Replica (well, I'm keeping the engine but everything else is going )
Old 11-30-2006, 11:41 AM
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Quote:
Originally posted by adomakin
nice one Merv! just one question-is 1.25 bar safe for these engines? im assuming that 1.25 is just for them short blats?
That's exactly what I'm going to ascertain when I get her on the dyno to verify my mixtures are in check at that boost level.

The high-po guys like Juan Ruiz and Mike Rombotis have been running those boost levels (or more) on pump grade 93 or 94 octane fuel without any dramas. That's on their EFI'd cars, like mine, and have countless drag race events under their belts

Mind you, I don't think it's wise to run that sort of boost on a track, but for pure street which only sees occassional full boost bursts, I don't think it's an issue. Again, the dyno will verify if all is OK.

For me, 1.1bar is plenty powerful. Might just bump it up to 1.25 when I demo the car for joy rides

Edit: Mike was able to run 1.55bar/22psi on pump grade 94 octane fuel in his TT Carrera. The result? 661crank HP & 675tq If he can run that kind of boost safely on pump fuel, I'm sure 17-18psi would be OK
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Merv
'89 911 Turbo Cab
Protomotive MAP ECU, Twin Plugged Heads, GT2-EVO CAMs, 3.3L fully finned P&C's, ARP fasteners, C2T head gaskets, Titanium Retainers, Turbo spec valves, springs & guides, 964 splash valves, GT35R BB turbo, GSF Stainless Headers, Magnaflow Exhaust, Full bay Intercooler, TiAL 46mm w/gate, TiAL 50mm BOV, Apexi AVC-R EBC, SPEC Stage3+ Clutch kit, Crane CDI Ignition

Last edited by WydRyd; 11-30-2006 at 07:59 PM..
Old 11-30-2006, 01:14 PM
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thats what I like to hear Merv!
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Andy

1980 SC soon to be big hp 3.3t powered 73RSR Replica (well, I'm keeping the engine but everything else is going )
Old 12-01-2006, 08:38 AM
  Pelican Parts Technical Article Directory    Reply With Quote #26 (permalink)
 
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