I got on kevin landers(rotary resurrection) website and saw how he said to do a compression test using a conventional tester. I got right at 90 PSI on both rotors, I understand this to be unexceptable and I an now going to start planning a rebuild or maybe just have it done, not sure yet. But would a compression this low cause the engine to not start at all, or do I have something else going on?

 

Engines with even 60s-70s will run. They will have issues but they WILL run.

 

90PSI is fine, just not ideal.

I've seen some pretty impressive compression increases by just letting the engine soak in MMO overnight.

 

a comrpession of around 90 should run fine really. it is somewhat low ,meaning the motor probably has 150K or more, or has been through alot

ive had a few different motors getting those numbers,and they run allright, alot more prone to flooding tho!

did u pull the shrader valve out of the checker and watch the bounces on each rotor?

 

if you used a conventional tester and it read 90 all around, after you add ambient pressure that puts you at 105psi.

I'm doing about 70psi all around and running...but that's it...

 

conventional? Do you mean a piston compression tester?

I got 90 on both rotors using a standard comp tester. Is it really higher?

I am very confused.

 

conventional as in the guage face starts at zero. If the guage face starts at 14.6, then it's already compensated.

 

ohh hmmm..... never hear of adding ambient that would make all mine alot better! lol

 

Hmm, I've never thought of that, adding ambient. My gauge starts at zero, and my 'vert gets 120 on all faces :p

hehehe. I think I'll avoid adding ambiant though, it's 'cheating' since no one else does :p

 

Help a new guy out, what is this MMO you speak of?

 

marvel mystery oil. it's marvelously mysterious.

 

interesting, time to hit google

*edit: Just found out the manufacturer is not too far from my house. "Howdy neighbor, could I borrow some oil?"

 

I've heard mixed things about putting MMO in your engine...I would do some research.

 

how would MMO increase the compression? it doesn't add metal.. it would only increase the numbers temporarily until the engine was run and the lubricants blown out of the engine..

 

No it's not...


What's in Marvel Mystery Oil?


MARVEL OIL -- MYSTERY OIL - LUBRICATING OIL
MATERIAL SAFETY DATA SHEET
NSN: 9150011264459
Manufacturer's CAGE: 95015
Part No. Indicator: A
Part Number/Trade Name: MYSTERY OIL
================================================== =========================
General Information
================================================== =========================
Item Name: LUBRICATING OIL
Company's Name: MARVEL OIL CO INC
Company's Street: 331 NORTH MAIN ST
Company's City: PORT CHESTER
Company's State: NY
Company's Country: US
Company's Zip Code: 10573
Company's Emerg Ph #: 914-937-4000
Company's Info Ph #: 914-937-4000
Distributor/Vendor # 1: NASTER SALE INC / DBA ACE TOOL CO
Distributor/Vendor # 1 Cage: 1X015
Record No. For Safety Entry: 001
Tot Safety Entries This Stk#: 003
Status: SMJ
Date MSDS Prepared: 01JUN91
Safety Data Review Date: 21FEB97
Supply Item Manager: CX
MSDS Preparer's Name: UNKNOWN
MSDS Serial Number: BLPGX
Specification Number: NONE
Spec Type, Grade, Class: NONE
Hazard Characteristic Code: F4
Unit Of Issue: EA
Unit Of Issue Container Qty: 1 QUART
Type Of Container: UNKNOWN
Net Unit Weight: 1.9 LBS
================================================== =========================
Ingredients/Identity Information
================================================== =========================
Proprietary: NO
Ingredient: KEROSENE (PETROLEUM), HYDROTREATED; (MINERAL SPIRITS)
Ingredient Sequence Number: 01
Percent: 30
NIOSH (RTECS) Number: OA5504000
CAS Number: 64742-47-8
OSHA PEL: 5 MG/M3 (MFR)
ACGIH TLV: 5 MG/M3 (MFR)
-------------------------------------
Proprietary: NO
Ingredient: SOLV REFINED HEAVY NAPHTHENIC DISTILLATE,PETROLEUM; (NAPTHENIC
BASE OIL DISTILLATE) CAS NO 64742-63-8, 64741-96-4.
Ingredient Sequence Number: 02
NIOSH (RTECS) Number: PY8040000
CAS Number: 64741-96-4
OSHA PEL: 5 MG/M3 (MFR)
ACGIH TLV: 5 MG/M3 (MFR)
================================================== =========================
Physical/Chemical Characteristics
================================================== =========================
Appearance And Odor: RED COLOR LIQUID WITH MILD ODOR.
Boiling Point: 313F,156C
Vapor Pressure (MM Hg/70 F): 2 @ 68
Specific Gravity: 0.9
Solubility In Water: NEGLIGIBLE
================================================== =========================
Fire and Explosion Hazard Data
================================================== =========================
Flash Point: 140F,60C
Extinguishing Media: CO2, DRY CHEMICAL, FOAM, WATER SPRAY, WATER FOG.
Special Fire Fighting Proc: WEAR NIOSH/MSHA APPROVED SCBA & FULL
PROTECTIVE EQUIPMENT (FP N).
Unusual Fire And Expl Hazrds: DO NOT STORE OR MIX WITH STRONG OXIDANTS.
================================================== =========================
Reactivity Data
================================================== =========================
Stability: YES
Cond To Avoid (Stability): NONE SPECIFIED BY MANUFACTURER.
Materials To Avoid: OXIDIZING AGENTS.
Hazardous Decomp Products: NONE SPECIFIED BY MANUFACTURER.
Hazardous Poly Occur: NO
Conditions To Avoid (Poly): NOT RELEVANT
================================================== =========================
Health Hazard Data
================================================== =========================
LD50-LC50 Mixture: NONE SPECIFIED BY MANUFACTURER.
Route Of Entry - Inhalation: YES
Route Of Entry - Skin: NO
Route Of Entry - Ingestion: YES
Health Haz Acute And Chronic: EYE: MILD IRRITATION. SKIN: ONE OR MORE
COMPONENTS OF THIS MATERIAL MAY CAUSE SKIN IRRITATION. PROLONGED OR
REPEATED CONTACT MAY CAUSE REDNESS, BURNING AND DRYING AND CRACKING OF THE
SKIN. INGEST: PULMONARY ASPIRATION HAZARD IF SWALLOWED. DO NOT INDUCE
VOMITING.
Carcinogenicity - NTP: NO
Carcinogenicity - IARC: NO
Carcinogenicity - OSHA: NO
Explanation Carcinogenicity: NOT RELEVANT
Signs/Symptoms Of Overexp: SEE HEALTH HAZARDS.
Med Cond Aggravated By Exp: NONE SPECIFIED BY MANUFACTURER.
REMOVE TO FRESH AIR. SUPPORT BREATHING (GIVE O2/ARTIFICIAL RESPIRATION) (FP
N). EYES: IMMEDIATELY FLUSH EYES WITH POTABLE WATER FOR A MINIMUM OF 15
MINUTES, SEEK ASSISTANCE FROM MD (FP N). SKIN: FLUSH WITH COPIOUS AMOUNTS
OF WATER. CALL MD (FP N).
================================================== =========================
Precautions for Safe Handling and Use
================================================== =========================
Steps If Matl Released/Spill: RECOVER FREE LIQUID, ADD ABSORBENT TO SPILL
AREA.
Neutralizing Agent: NONE SPECIFIED BY MANUFACTURER.
Waste Disposal Method: KEEP PRODUCT OUT OF SEWERS AND WATERCOURSES.
DISPOSAL SHOULD BE IN COMPLIANCE WITH FEDERAL, STATE AND LOCAL LAWS.
Precautions-Handling/Storing: KEEP AWAY FROM HEAT AND OPEN FLAME, CONTAINS
REFINED PETROLEUM DISTILLATES, IF SWALLOWED DO NOT INDUCE VOMITING, IF
INGEST CALL MD IMMED.
Other Precautions: NONE SPECIFIED BY MANUFACTURER.
================================================== =========================
Control Measures
================================================== =========================
Respiratory Protection: NIOSH/MSHA APPROVED RESPIRATOR APPROPRIATE FOR
EXPOSURE OF CONCERN (FP N).
Ventilation: MECHANICAL VENTILATION AS NEEDED.
Protective Gloves: CHEMICAL RESISTANT GLOVES.
Eye Protection: CHEMICAL WORKERS GOGGLES (FP N).
Other Protective Equipment: USE CHEMICAL RESISTANT APRON OR OTHER
IMPERVIOUS CLOTHING TO AVOID PROLONGED OR REPEATED SKIN CONTACT.
Work Hygienic Practices: NONE SPECIFIED BY MANUFACTURER.
Suppl. Safety & Health Data: NONE SPECIFIED BY MANUFACTURER.
================================================== =========================
Transportation Data
================================================== =========================
Trans Data Review Date: 97052
DOT PSN Code: LKZ
DOT Proper Shipping Name: PETROLEUM DISTILLATES, N.O.S. OR PETROLEUM
PRODUCTS, N.O.S.
DOT Class: 3
DOT ID Number: UN1268
DOT Pack Group: III
DOT Label: FLAMMABLE LIQUID
IMO PSN Code: LMH
IMO Proper Shipping Name: PETROLEUM DISTILLATES, N.O.S. o
IMO Regulations Page Number: 3375
IMO UN Number: 1268
IMO UN Class: 3.3
IMO Subsidiary Risk Label: -
IATA PSN Code: TJB
IATA UN ID Number: 1268
IATA Proper Shipping Name: PETROLEUM DISTILLATES, N.O.S.
IATA UN Class: 3
IATA Label: FLAMMABLE LIQUID
AFI PSN Code: TJB
AFI Prop. Shipping Name: PETROLEUM DISTILLATES, N.O.S.
AFI Class: 3
AFI ID Number: UN1268
AFI Pack Group: III
AFI Basic Pac Ref: A7.3
MMAC Code: NR
N.O.S. Shipping Name: CONTAINS KEROSENE AND NAPHTHALENIC PETROLEUM
DISTILLATES.
Additional Trans Data: PETROLEUM OIL,UN1270,3,III IS NOT A PSN UNDER IMO
AND IATA.
================================================== =========================
Disposal Data
================================================== =========================
================================================== =========================
Label Data
================================================== =========================
Label Required: YES
Technical Review Date: 21FEB97
Label Date: 22NOV91
MFR Label Number: UNKNOWN
Label Status: F
Common Name: MYSTERY OIL
Chronic Hazard: YES
Signal Word: CAUTION!
Acute Health Hazard-Slight: X
Contact Hazard-Slight: X
Fire Hazard-Slight: X
Reactivity Hazard-None: X
Special Hazard Precautions: ACUTE: COMBUSTIBLE MATERIAL. MAY CAUSE SKIN
IRRITATION. PULMONARY ASPIRATION HAZARD IF SWALLOWED. CHRONIC: PROLONGED OR
REPEATED CONTACT MAY CAUSE REDNESS, BURNING AND DRYING, AND CRACKING OF THE
SKIN.
Protect Eye: Y
Protect Skin: Y
Protect Respiratory: Y
Label Name: MARVEL OIL CO INC
Label Street: 331 NORTH MAIN ST
Label City: PORT CHESTER
Label State: NY
Label Zip Code: 10573
Label Country: US
Label Emergency Number: 914-937-4000



-Ted

 

Where are you getting this info from? I have seen you post it in 3 threads now and it does not make any sense what-so-ever. There is not 1 bar of ambient pressure in your engine. If the engine is reading 90psi then that is what the compression is, there is no adder for this number.

There is a "how to" on our website with a breakdown of the readings and their meanings. www.banzairacing.net

 

Ummm....there's 1 bar of ambient pressure any place there's air that has access to open atmosphere. That guage, starting at zero, is already reading 14.6 pounds of pressure. Sorry.

 

wrong! if the gauge is calibrated to read zero it is putting out 90 PSI, if it is calibrated to read 15psi and reads 105PSI it still only has 90PSI of compression....


as everyone sais, please do not post false statements on the forums.

 

Exactly my point, the compression gauge takes this into account. Do not tell people to add 14.6 psi to their compression readings, this will yield incorrect numbers.

 

wow ted that was alot of useless information right there...

 

Hey, at least you know what's EXACTLY in that Mystery stuff!


-Ted

 

HEY Ted..first of all I'm Dave..(putting out hand to shake) nice to meet ya..where would a lad be able to get some of that there MMO? been readin' some of your stuff so i figure if you haven't labelled it "snake oil" it must be a good thing !

 

LAst time I got some I got it from Wal-Mart.

 

Hey!!!..your not Ted TED sounds alot TALLER!!! ....coo,coo,coo!!!(Rosco P Coltrane laugh)!!!!

 

This kinda reminds me of the lounge at times...