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 Technical BBS > 1- Porsche Technical Forums > 911 / 930 Turbo & Super Charging Forum


Reply
 
LinkBack Thread Tools Rate Thread
Author
Thread Post New Thread    Reply
Registered User
 
Join Date: Aug 2007
Posts: 402
Garage
Send a message via MSN to MKEDF
Exclamation Low Power Issue...

Hello....Need some help....

I bought this 75S with full 1977 930 Transplant..

It runs well, feels okay when going full boost...

But i decided to have a dyno run last weekend..

Just before that valve adjustment was done and i noticed the rotor at the distributor is the one with the cut off option...(speed limit)...


As the test raned, very low hp resulted just 236 HP (I was expecting at least 260)..

Should i replace the rotor? or should I look for a worst scenario??..

Here it is the dyno run...

Any thoughts?


Look at how low the RPM are cutoff..today we changed timing, and a improvement was noticeable, 5,500 rpm now.....
__________________
MKEDF, 911 78 SC (rebuilt), 75 S Turbooo!!
2001 Boxster (Sold, girl car), 2001 330CI Coupe, 2001 325I, 2001 C240 V6
2003 330 I F1 (E46), 2002 320 I F1 (E46), 1999 323 I (E46)
2001 Peugeot 406 Pinifarina Coupe, 2001 325 I (E46), 2000 328 I (E46)
Never Bought Audi or Cooper too expensive for what you get

Last edited by MKEDF; 05-17-2008 at 10:12 AM.. Reason: Please??
Old 05-16-2008, 07:11 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #1 (permalink)
Turbo Hooligan
 
Join Date: Sep 2007
Location: Greensboro NC
Posts: 1,246
US 3.0 turbos only had 240hp stock, and the euro versions came with 260. your numbers don't seem far off. I don't know about the dyno though. nothing more boost, timing, fuel and money cant fix. lol
__________________
www.d-zug.com
blog.d-zug.com

All these guys do is drive too fast, work on cars, chase ******* and drink.. really no fun at all...
Old 05-17-2008, 11:02 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #2 (permalink)
Registered User
 
Join Date: Aug 2007
Posts: 402
Garage
Send a message via MSN to MKEDF
I just did a timming adjustment...it feels okay..

Also set up the Crane Cams Ignition to cut at 6,000 rpm..

Funny is that as the car is steady the set up works perfect...

But running the cut off limit goes down....i guess now it cuts around 5,500

I guess the cut off rotor is not working well...

Should i remove?

1,000 rpm added to the engine with the timming adjustment...

I guess now i might be somehwere around 250hp..


Should i buy a rotor without the cut off option?...or just remove the switch from the rotor??

Engine is a 930/53 with 54k miles mostly stock
Euro heat exchangers
930 Stock Intercooler installed


Any help appreciated...

MiCk..
__________________
MKEDF, 911 78 SC (rebuilt), 75 S Turbooo!!
2001 Boxster (Sold, girl car), 2001 330CI Coupe, 2001 325I, 2001 C240 V6
2003 330 I F1 (E46), 2002 320 I F1 (E46), 1999 323 I (E46)
2001 Peugeot 406 Pinifarina Coupe, 2001 325 I (E46), 2000 328 I (E46)
Never Bought Audi or Cooper too expensive for what you get

Last edited by MKEDF; 05-19-2008 at 08:16 PM.. Reason: engine type
Old 05-19-2008, 08:13 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #3 (permalink)
Crotchety Old Bastard
 
RarlyL8's Avatar
 
Join Date: Jan 2000
Location: Huntsville, AL
Posts: 13,408
Garage
Your dyno graph looks like stock.
Don't know about the aftermarket ignition cutoff. You could just pop in another rotor and see if the problem persists. Good idea to have over-rev protection if you are running a 915. Mine pops the limit in 1st and 2nd before I can react (tire spin).
__________________
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 05-20-2008, 05:35 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #4 (permalink)
Reply

Thread Tools
Rate This Thread
Rate This Thread:

 


All times are GMT -8. The time now is 02:57 PM.


 
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2018, 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.