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Join Date: Jun 2007
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Question Can one estimate the power given a list of bolt on mods?

I was curious how much horsepower my car makes since it is modified a bit.

It is the Euro 82 spec 3.3 with CIS

The turbo receipt says a K28 and the guy I bought the car from said the turbo was a K28 cheater, but this is what is under there...




I have B&B headers and a GHL exhaust.

K&N filter and an aftermarket intake box.

Tial F40 wastegate with a 1 bar spring

The engine is in very healthy condition.


... so the last owner said he thought it was around 340 whp. Given the mods, does that sound about right?
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82 Porsche 930 Euro, black, 31K miles.
Factory stock other than k27 turbo, B&B headers, GHL exhaust, Tial F40, 1 bar wastegate, MSD 6A ignition, 8" and 9" Fuch upgrade, H4 Xenon headlamps and a 930S steering wheel.
Old 09-30-2007, 06:00 PM
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I'm thinking 375 at the crank.
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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 10-01-2007, 11:18 AM
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So how much loss is typical through the transaxle?
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82 Porsche 930 Euro, black, 31K miles.
Factory stock other than k27 turbo, B&B headers, GHL exhaust, Tial F40, 1 bar wastegate, MSD 6A ignition, 8" and 9" Fuch upgrade, H4 Xenon headlamps and a 930S steering wheel.
Old 10-01-2007, 03:41 PM
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Originally Posted by Maxx1 View Post
So how much loss is typical through the transaxle?
I have heard 17%.

I could be wrong.
Old 10-01-2007, 05:50 PM
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... well I hope you are wrong ... otherwise my car has a measly 311.25 horsepower at the rear wheels.

At least my rear tires should last a long time


I understand these are all just estimates and we could be on the money or off the wall.
If I get a bigger intercooler, that's worth a little bit of power, is it not?
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82 Porsche 930 Euro, black, 31K miles.
Factory stock other than k27 turbo, B&B headers, GHL exhaust, Tial F40, 1 bar wastegate, MSD 6A ignition, 8" and 9" Fuch upgrade, H4 Xenon headlamps and a 930S steering wheel.
Old 10-02-2007, 03:26 AM
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Your setup shares some similarity to my current setup:
Euro Exhaust w/ RarlyL8 Muffler
"Custom" Air Filter Assembly
K27-7200
SC Cams
0.7bar Boost
B&B Intercooler

- My cams give me about what your headers would give you so for the sake of argument lets call that a wash.
- Your 1.0 Bar vs my 0.7 Bar boost is good for ~40HP or so.

Mine made 306HP to the rear wheels dynoed on a 100* day.
Given the extra boost I'd say the PO was about right on your power level.

Bigger intercooler will free up some power by cooling the intake change. Mine was completely heat soaked during the dyno runs so any help there was cancelled out.
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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 10-02-2007, 05:14 AM
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