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Doug Siegel
 
Join Date: Oct 2007
Location: Bloomington, IN
Posts: 314
Well put Brian.
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88' blk/blk 930: Haltech EFI, Twin Plug, Pauter Rods, Nascar Bearings, custom crank work, dowel pinned case, ported manifold and heads, Kokeln I/C, SC Cams, Turbonetics ball bearing 62-1, BB headers, RARLYL8 Zork, additional 993 oil filter, plx/inyourface gage, RS style coilover, Fikse FM10-17 wheels, TIAL 46mm 1 bar. (where the heck did all my money go?)
Old 06-01-2008, 04:46 PM
  Pelican Parts Technical Article Directory    Reply With Quote #21 (permalink)
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Location: S. Florida
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Today I checked system pressure and I was at 95psi.
When I removed the system presure regulator from the IA modified CIS head there were only 2 shims under the spring, a thick one and a thin one.
The factory manuel say's there are 3 shims in a stock fuel head.

When I put it back in with out the 2 shims I had 75psi. I figured thats got to be too low so I put the thin shim back in and am now at 80psi.

Road tested it and my LC-1 AFR gauge decided not to work again.. even after another free air calibration it still won't work so I don't know what my AFR is now.
It runs ok so I'll leave it the way it is until I get the LC-1 working again if thats possible.
I can still smell ultra rich exhaust when I accelerate hard and with no sound pad and the windows up I hear only an occasional single "tink" sound up around 6500rpm which is detonation. At least it is not a steady crackleing of detonation sound.

I can only hear detonation or pinging with the windows up, and removing the rotted out old sound pad helps to hear it.

I'm going off topic now but I should mention that my engine is set up with Powerhaus group B cams which are longer duration and timed later than 964 cams, B&B headers and single out muffler, K27HFS turbo, Garretson long neck intercooler, IA modified fuel head, Brian Leask adjustable control pressure regulator, and running 1-1.1bar with an adjustable boost valve, and .9 bar spring in the wastegate.

It's fast... estimated around 420HP at the flywheel.
The group B cams are in there from the previous owner. The powerband is very strong from 4000-7000rpm.
I will put in a set of SC330 cams I have for more midrange torque probably next winter. That should make it better for street driving.

edit: my engine also has raceware rod bolts.

Last edited by JFairman; 06-02-2008 at 09:17 PM..
Old 06-01-2008, 05:58 PM
  Pelican Parts Technical Article Directory    Reply With Quote #22 (permalink)
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Brian, how do head studs affect fuelling?
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1981 UK 930. G50/01 shortened, 964 3.8RS Fibreglass Body Kit, 18" Alloys 8.5" F & 10" R, 225's F & 285's R, Special Colour Metallic Blue Paint, FIA Sparco Evo's, A/C and Air Pump removed, Electronic Boost Controller, GHL Headers, Tial46 WG.
Fitting - New service kit.
Needs Fitting - Innovate XD-16 Kit, Kokeln IC. Stephen's K27 HFS, EVO Intake Assy & his Modded USA Fuel Head.

1983 UK 911 3.2 Carrera Sport Coupe. Black, Black Leather with Red Piping, Black Alloy Gear Knob, K&N Air Filter Element, Turbo Tie rods.
Needs Fitting - K&N CO Sensor, Round A/F Dial Gauge, Factory Short Shift Kit.

http://www.danasoft.com/sig/Iamnotanumber.jpg

Last edited by NathanUK; 06-02-2008 at 02:10 PM..
Old 06-02-2008, 01:16 PM
  Pelican Parts Technical Article Directory    Reply With Quote #23 (permalink)
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Craig 930 RS's Avatar
 
Join Date: Sep 2003
Location: Kirkland, WA
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Looks like he's 'stuck' with the IA head he's got, so he just might *have* to work in reverse.
If safe, (and suported by a decent IC) - a tad higher boost. etc.

Not too many other options, unfortunately.
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- Craig 3.4L, SC heads, 964 cams, B&B headers, K27 HF ZC turbo, Ruf IC. WUR & RPM switch, IA fuel head, Zork, G50/50 5 speed. 438 RWHP / 413 RWTQ -
"930 is the wild slut you sleep with who tries to kill you every time you "get it on" - Quote by Gabe
Movie: 930 on the dyno
Old 06-02-2008, 01:44 PM
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Crotchety Old Bastard
 
RarlyL8's Avatar
 
Join Date: Jan 2000
Location: Huntsville, AL
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Quote:
Brian, how do head studs effect fuelling?
It's not so obvious. ARP, or like, head studs allow you to extend the RPM range of the engine. More RPM = more fuel needed. I found that my 11.8 AFR @ 6000rpm was leaning to 12.2 by 7000rpm.
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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 06-02-2008, 01:57 PM
  Pelican Parts Technical Article Directory    Reply With Quote #25 (permalink)
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Ah, OK. You got me there!

So long as you do the rod bolts too though.
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1981 UK 930. G50/01 shortened, 964 3.8RS Fibreglass Body Kit, 18" Alloys 8.5" F & 10" R, 225's F & 285's R, Special Colour Metallic Blue Paint, FIA Sparco Evo's, A/C and Air Pump removed, Electronic Boost Controller, GHL Headers, Tial46 WG.
Fitting - New service kit.
Needs Fitting - Innovate XD-16 Kit, Kokeln IC. Stephen's K27 HFS, EVO Intake Assy & his Modded USA Fuel Head.

1983 UK 911 3.2 Carrera Sport Coupe. Black, Black Leather with Red Piping, Black Alloy Gear Knob, K&N Air Filter Element, Turbo Tie rods.
Needs Fitting - K&N CO Sensor, Round A/F Dial Gauge, Factory Short Shift Kit.

http://www.danasoft.com/sig/Iamnotanumber.jpg
Old 06-02-2008, 02:11 PM
  Pelican Parts Technical Article Directory    Reply With Quote #26 (permalink)
 
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Quote:
Originally Posted by Craig 930 RS View Post
Looks like he's 'stuck' with the IA head he's got, so he just might *have* to work in reverse.
If safe, (and suported by a decent IC) - a tad higher boost. etc.

Not too many other options, unfortunately.

Well not really, he can send it back and I can recalibrate it to a lower level, but still higher than stock.
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94 3.6Turbo 6-speed AWD
Old 06-02-2008, 02:46 PM
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Stephen:
I'll send you an email; I need my head recalibrated also.
TIA
Pat
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Patrick E. Keefe
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Old 06-02-2008, 03:19 PM
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me too...

jim
Old 06-02-2008, 05:35 PM
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Love it, I never thought I would see the day when CIS gave TOO much fuel
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Stephen
94 3.6Turbo 6-speed AWD
Old 06-02-2008, 09:06 PM
  Pelican Parts Technical Article Directory    Reply With Quote #30 (permalink)
Registered User
 
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Quote:
Originally Posted by Porschephd View Post
Love it, I never thought I would see the day when CIS gave TOO much fuel
lol!
Old 06-02-2008, 09:19 PM
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Quote:
Originally Posted by porschephd View Post
love It, I Never Thought I Would See The Day When Cis Gave Too Much Fuel :d
What's the world coming to?
Old 06-03-2008, 03:53 AM
  Pelican Parts Technical Article Directory    Reply With Quote #32 (permalink)
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