Pelican Parts
Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help



Go Back   Pelican Parts Forums > Porsche Forums > 911 / 930 Turbo & Super Charging Forum


Reply
 
LinkBack Thread Tools Rate Thread
Author
Thread Post New Thread    Reply
Registered User
 
xbmwguy's Avatar
 
Join Date: Apr 2008
Location: west palm beach fla
Posts: 1,648
Garage
i wouldnt do it on a regular basis with cis
Old 06-30-2013, 04:43 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #21 (permalink)
Crotchety Old Bastard
 
RarlyL8's Avatar
 
Join Date: Jan 2000
Location: Huntsville, AL
Posts: 13,614
Garage
1.2bar boost at 7.0:1 CR engine is an effective CR of >12.0:1. You need high octane fuel for that to be safe.
__________________
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 06-30-2013, 07:06 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #22 (permalink)
Registered User
 
Join Date: Jun 2010
Posts: 24
I agree with Rarlyl8. I run a modded k26 on my 3.4l euro exhaust. still cis and turn consistant 11.3 sec quarters at 127mph. once i even saw 130.1 mph. roll on performance is smashing so there aint nothin wrong with the ole kkk!
Please elaborate.

Weight?
Full boost at what RPM?
Fuel?
Boost bar/PSI?
930 or G50 trans?
What slicks?
Launch RPM?
Compressor inducer size?
Turbine exducer size?

Having larger than your standard fare K26 compressor/turbine combos can make a huge difference.

Impressive 1/4 mile results for sure!
Last edited by Tippy; 06-29-2013 at 06:59 PM..
06-29-2013, 05:50

Quarter mile results. Link to some old info
Old 07-01-2013, 01:36 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #23 (permalink)
Registered User
 
Join Date: Nov 2012
Posts: 227
I run 12 psi on a daily basis which yields about 325 hp and on the second stage of my set up is 18psi for short runs or to shut the vette or whatever is next to me down. I know guys making 450 -500 non CIS 928's with a supercharger of all things. I have built them myself and with turbos. I have an EFI 928 in here now making 450 wheel on 9psi! And that is on an intercooled SC. It really is trial and error and always safety as the primary objective. These 930 lumps were not designed to fail under a mere 500 hp especially for street driving. I might add in the world of forced induction there are many, many ways to skin the same cat.
Old 07-01-2013, 08:42 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #24 (permalink)
Chain fence eating turbo
 
Join Date: Dec 2008
Location: Austin, TX
Posts: 8,715
Quote:
Quarter mile results. Link to some old info
I actually posted in that thread. Our engines are pretty close to specs minus your 964 cams and my C3.2 intake and heads and mine too has made 447 whp.

Mine only has 12.4 in it, no matter if I power shift or let off. So, you must be able to get boost right after, and I mean right after you dump clutch to be able to accelerate.

The known factor why mine is so terribly slow in the 1/4 is I only see 4.65 lbs of boost in 1st and 12lbs in 2nd.

That will now change with a new turbo and launch control.

Lastly, gonna raise rev limit since hitting rev limiter well before traps unless my taller tires carries me through.

Man, your car smokes! Inspiration no doubt.
Old 07-01-2013, 10:09 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #25 (permalink)
Registered User
 
Join Date: Nov 2012
Posts: 227
Tippy what turbo are you running now? There are so many variables to why the car is only boosting 12psi in second (assuming that your at the top of your revs ) that I thought I would ask about the turbo. So many on here that could probably figure that out for you with some basic info. 12.4 in the 1/4 with 447 at the ground and assuming a skilled driver and race gas sounds a little weak.
Old 07-01-2013, 03:08 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #26 (permalink)
 
Chain fence eating turbo
 
Join Date: Dec 2008
Location: Austin, TX
Posts: 8,715
A worn out Turbonetics 60-1 with .84 T4. I run 93 octane, no race gas.

It's only slow because it doesn't make full spool until 3rd gear. If I could get full spool in 1st and 2nd at a decent RPM, the car would be much quicker.

I'm putting a new turbo on shortly.
Old 07-01-2013, 03:21 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #27 (permalink)
HRHski
 
HRHski's Avatar
 
Join Date: Oct 2010
Location: Dumont, Colorado
Posts: 69
Garage
911 1982 sc

I'm only looking for about 300hp at the rear wheels for my 82 SC, I have the engine for it, low compression pistons, 964 cams, new build. I also have an intercooler, limited slip, brakes and tires. Where do I find the kit, plumbing to make it happen, is it a K27 or other set up? I was thinking BB headers and heat exchangers, but can't find them. Any help would be appreciated.
__________________
www.harbskisystems.com

http://harbskisysems.blogspot.com
Old 07-04-2013, 07:23 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #28 (permalink)
Chain fence eating turbo
 
Join Date: Dec 2008
Location: Austin, TX
Posts: 8,715
You just look in the classifieds for 930 plumbing.
Old 07-05-2013, 07:43 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #29 (permalink)
Crotchety Old Bastard
 
RarlyL8's Avatar
 
Join Date: Jan 2000
Location: Huntsville, AL
Posts: 13,614
Garage
You don't need headers for 300WHP. Bolt on OEM 930 J-pipe exchangers, a K27-7200 or GT30, IC, 1.0bar and you are there.
__________________
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 07-06-2013, 03:35 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #30 (permalink)
Registered User
 
Join Date: Nov 2012
Posts: 227
Brian do you sell headers with heat? I am thinking I might go that route to complete my build if you don't think they will slow down my spool time.
Old 07-07-2013, 06:48 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #31 (permalink)
Chain fence eating turbo
 
Join Date: Dec 2008
Location: Austin, TX
Posts: 8,715
Theoretically, headers with heat (all things being equal) should help spool by trapping more heat.
Old 07-07-2013, 08:05 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #32 (permalink)
Crotchety Old Bastard
 
RarlyL8's Avatar
 
Join Date: Jan 2000
Location: Huntsville, AL
Posts: 13,614
Garage
Yes our headers will decrease spool time significantly over OEM. When bolted onto a bone stock J-pipe engine (which is not done often) full boost dropped from 4200rpm to about 3400rpm. Power increased by about 50WHP. Results are even more dramatic on the early y-pipe engines.

As a drag racing data point, my car in 300WHP trim ran the quarter in the mid-12's. That was with a 915 tranny at 2700lb. Trap speed in the 1/8th was 90mph.
__________________
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 07-07-2013, 08:14 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #33 (permalink)
Chain fence eating turbo
 
Join Date: Dec 2008
Location: Austin, TX
Posts: 8,715
Sorry to hijack to OP but Brian, have you noticed any quicker spool with going to heater boxes? I thought I read you make boxes that fit over the primaries?

Secondly, what boost are achieving in 1st with the 915?
Old 07-07-2013, 09:38 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #34 (permalink)
Registered User
 
Join Date: Nov 2012
Posts: 227
good question about the boxes. Brian that is a pretty dramatic improvement over the stock headers, were you including the stock scenario with factory cat and muffler? Also I would be curious as well concerning Tippy:s question about 1st gear boost. In my 87 I can get 10psi in first at 5500 RPM, which is much different than the stock turbo
Old 07-09-2013, 08:50 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #35 (permalink)
Crotchety Old Bastard
 
RarlyL8's Avatar
 
Join Date: Jan 2000
Location: Huntsville, AL
Posts: 13,614
Garage
No idea about boost level in first gear as the tires would fry. The instant I launched I had to grab second, it was that quick. Second would also fry but I had time to see the boost gage peg the stock 0.75 bar.
Yes the headers were installed with no other changes on that car. Stock muffler etc.
Heater boxes have no affect on performance, unless you are too cold to grip the wheel, ha!
Old 07-09-2013, 11:02 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #36 (permalink)
Registered User
 
Join Date: Nov 2012
Posts: 227
my tires won't fry as they used to stock. the turbo I have now is very linear in delivery it is more or less just uneventful thrust.
Old 07-09-2013, 11:35 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #37 (permalink)
Reply

Thread Tools
Rate This Thread
Rate This Thread:

 

Tags
930 , twin turbo


All times are GMT -8. The time now is 03:50 PM.


 
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page
 

DTO Garage Plus vBulletin Plugins by Drive Thru Online, Inc.