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 > Porsche 964 & 993 Technical Forum


Reply
 
LinkBack Thread Tools Rate Thread
Author
Thread Post New Thread    Reply
Registered User
 
Join Date: Mar 2018
Posts: 80
Fuel additive recommendation

Highest grade of fuel we have around here is 91. Can anyone recommend a good fuel additive or octane booster for my 993?
Old 11-03-2018, 08:38 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #1 (permalink)
Administrator
 
Dmitry at Pelican Parts's Avatar
 
Join Date: Aug 2016
Location: Los Angeles, CA
Posts: 4,601
Garage
Hello - take a look at the link below to a great additive that Liqui Moly makes. Please let us know if you have any other questions.

https://www.pelicanparts.com/catalog/shopcart/CARE/POR_CARE_LIQUI1_pg15.htm
Old 11-05-2018, 12:40 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #2 (permalink)
Registered User
 
EMBPilot's Avatar
 
Join Date: Sep 2006
Location: Jersey Shore
Posts: 677
Garage
Send a message via AIM to EMBPilot Send a message via Yahoo to EMBPilot
Techron available locally is also very popular option for 993
__________________
1995 993 C2
Old 11-10-2018, 02:16 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #3 (permalink)
Registered User
 
Nine9six's Avatar
 
Join Date: Jun 2004
Location: So Cal
Posts: 2,806
Garage
Quote:
Originally Posted by EMBPilot View Post
Techron available locally is also very popular option for 993
I believe Techron to be a fuel additive that cleans engine deposits and not so much (at all) an octane booster.
__________________
If it flows, it goes. If its smooth, it moves. Any questions?
96 993 C2 (Current)
87 911 Factory Turbo-Look Cab (Sold)
85 911 Factory Turbo-Look Targa (Gone)

Last edited by Nine9six; 12-29-2018 at 07:59 PM..
Old 12-06-2018, 10:23 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #4 (permalink)
Registered User
 
Join Date: Nov 2000
Location: TN
Posts: 130
I'd suggest Torco, Lucas, or 104+ octane booster (in that order), as it you can probably find one of those locally.
__________________
Iron Hill Restorations
Specializing in vintage Porsches
Home of the 914 Umbrella Cover
'91 964 Targa guards red, cashmere
several 914's and loads of parts
Old 01-03-2019, 06:53 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #5 (permalink)
Registered User
 
Join Date: Jan 2019
Location: The Republic of San Francisco
Posts: 15
Garage
torco works well
Old 01-20-2019, 01:27 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #6 (permalink)
 
Registered User
 
Join Date: Aug 2018
Posts: 4
Quote:
Originally Posted by Kansas View Post
Highest grade of fuel we have around here is 91. Can anyone recommend a good fuel additive or octane booster for my 993?
Hi, I often wonder how owners can state that their cars produce, say, 272HP or 285 HP if they are only using 91 octane fuel? Surely these figures are predicated on the car being driven with 98 octane, or would that mean our Australian/English cars produce more power, or conversely , USA vehicles produce less?
Old 01-21-2019, 11:44 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #7 (permalink)
Registered User
 
nickd's Avatar
 
Join Date: Apr 2002
Location: Cambridge, MA
Posts: 488
Octane ratings use a different calculation in US vs RoW. Germany’s 98 equals US 93. Similarly, RoW 95 equals US 91. 993 calls for RoW 95, so US 91 is just fine. If you have a very hot track day planned, then dump in some octane booster (better yet, use the track fuel pump).
Old 01-25-2019, 03:48 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #8 (permalink)
Registered User
 
Mahler9th's Avatar
 
Join Date: Oct 2005
Location: Northern California
Posts: 2,401
Octane boosters are a complete waste of money for stock 964 and 993 cars.
__________________
Mike
PCA Golden Gate Region
Porsche Racing Club #4
BMWCCA
NASA
Old 01-26-2019, 10:16 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #9 (permalink)
Registered User
 
Join Date: Mar 2010
Location: Socal
Posts: 832
I’ve used them as a cleaner in the past .
Worked especially well on a supercharged Range Rover .
No noticeable performance gain whilst in the tank , but ran MUCH better on the following tank and thereafter for the next few 000 miles .

I’ve never tried them on a 64 or 93 , but suspect Better performance will be had by disconnecting the battery for 30 minutes ...

I was just thinking today about adding one to my tank , before it first fires after 7 years idle .
But I allready have a dedicated cleaner in the tank as a flush .
I was thinking I’ll let it fire in the garage , then once I know it will start push it onto my inclined driveway to smoke the neighbors out instead of smoking my garage out
Old 01-26-2019, 09:24 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #10 (permalink)
KNS KNS is offline
Registered User
 
Join Date: Jan 2004
Posts: 5,419
Quote:
Originally Posted by Mahler9th View Post
Octane boosters are a complete waste of money for stock 964 and 993 cars.
If you can only get 91 gasoline (rather than 93) and you live in the desert Southwest, you need to bump up your octane to match 93 for summer driving (or go easy on the throttle). Steve Weiner will tell you the same thing. Driving my 993 along side a high wall and with the window open, I could hear the “Clackity, clackity” of detonation under hard accerleration. This was while I was living in Phoenix and on a hot day with 91 pump gas.

Had I not had the window down and the wall next to me I wouldn’t have heard it. The car is stock. Same goes for climbing a long incline or mountain pass on a hot day. These cars were designed for 93 but you can’t get that in every state.
__________________
Kurt
1984 911 Carrera
Old 01-30-2019, 09:49 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #11 (permalink)
Registered User
 
Mike964_61's Avatar
 
Join Date: Apr 2018
Location: South Tampa
Posts: 259
Garage
Try Torco fuels website, the sell race additives that will give you the bump you need. Not cheap, but def cheaper than a new motor.
Old 01-30-2019, 10:15 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #12 (permalink)
Amethyst
 
Amethyst's Avatar
 
Join Date: Jun 2013
Location: In the South
Posts: 4
Garage
I use Archoil AR6200 fuel treatment on my stock 964/993. I use it to counteract the harmful effects of ethanol to the fuel system. The advertising claims it combats knocking/pinging and improves gasoline's resistance to pre-ignition. I believe that is what all the competing products claim as well. You will have to decide which one you want to believe. I don't hear any knocking/pinging from the engine during the hot summer drives. https://www.archoil.com/products/ar6200-fuel-treatment
Old 02-01-2019, 01:19 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #13 (permalink)
Registered User
 
Mahler9th's Avatar
 
Join Date: Oct 2005
Location: Northern California
Posts: 2,401
What is the purpose of octane booster for this application? As all of you likely know, these engines use DME and that comes along with knock sensing and subsequent dynamic changes. So it is an adaptive system.

There are of course design limits, and I am sure PAG would say, for example in a warranty situation, that if you used fuel with an octane rating of 70 R+M/2 and they specified a minimum of 91, then you might be denied a claim if there was some kind of engine problem or damage.

I am pretty sure that there are error bars in the government's regs related to stated octane numbers, and undoubtedly PAG factored these in (with headroom) when the DME systems were designed back in the 90's.

I owned a 993 for a few years here in CA, and I think when I had the car all you could get was 91 r+m/2 (with whatever error bars existed at the time).

The car could deal with it. I never tracked the car, but if I recall correctly it was not common to worry about 91 in track use with these cars when they were active in track events.

There are always "corner cases" with these things. I can envision intake air temperature and fuel quality/consistency in places like the desert SW and high loads could push the system beyond its adaptive range. But in those cases I would worry more about thermal stresses on cylinder heads than knock (I have cracked a couple of 993 heads in high ambient temp racing conditions-- I would hate to have that happen on a street car).

But I don't think it makes sense to use a booster if the system is stock and the fuel is in the legal part of the quality curve in most places. That assumes of course that the rating system and general fuel composition today is close to what it was when the cars were designed.

If I had a stock car and I had issues with knock because of the fuel available in my area, I would try to come up with a different solution than octane booster.
__________________
Mike
PCA Golden Gate Region
Porsche Racing Club #4
BMWCCA
NASA

Last edited by Mahler9th; 02-02-2019 at 06:39 AM..
Old 02-01-2019, 03:54 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #14 (permalink)
Registered User
 
Join Date: Feb 2013
Location: SoCal
Posts: 1,293
Garage
Based on Steve Wiener. recommendations I went with lower US Spec 3.2 Mahle P&Cs over the Euro highrer compression on my recent build. I really wanted to go 10 3 1 euro but without twin plug or 95 min octane no joy.

In speaking with Steve Wong he comfirmed same thing. His chip would have to detune the Euro spec for CA 91 octane eliminating he higher compression.

Went with US spec, test pipe and Steve Wong chip.

Stoked
__________________
PCA, POC & SCCA long time Member
Old 02-01-2019, 05:02 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #15 (permalink)
Registered User
 
Join Date: Oct 2004
Posts: 336
I talked to VP at Rennsport about using their octane booster to avoid paying $10/gal. at the track. They said don't do it for a track car.
Old 02-09-2019, 05:39 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #16 (permalink)
Reply

Thread Tools
Rate This Thread
Rate This Thread:

 


All times are GMT -8. The time now is 06:25 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.