Mazda Rotary Club

Cars by Model Type => 3rd generation RX-7's => Topic started by: ENVYD on February 19, 2008, 05:02:52 PM

Title: compression results
Post by: ENVYD on February 19, 2008, 05:02:52 PM
i just want to know what are good results for the rx7 as myn is going in tomoro i would like to get an idea of people that know what there talking about!
 
thanks
steven
Title: compression results
Post by: S3TH on February 19, 2008, 05:13:07 PM
fresh is 8.5, good is 7.3 + bad is sub 6.5
Title: compression results
Post by: Matt_K on February 19, 2008, 05:17:56 PM
It\'s by no means \'accurate\' but i\'ve always gone on these kinda figures. More importantly, the 3 figures on both front and rear rotor should be close to each other. a big drop on one side could indicate problerms (in bar below btw)

8+ bar perfect
7+ bar great, plenty of life left
6+ bar ok, some life left, be wary if new purchase
5+ bar be prepared for a rebuild and probably already has hot start problems
4+ bar fcuked.
Title: compression results
Post by: ENVYD on February 19, 2008, 05:32:29 PM
ok thats a great help people!
 
steven
Title: compression results
Post by: mattywhitt on February 19, 2008, 05:52:29 PM
I thought your car was for sale on pistonheads? Are you keeping it now?
Title: compression results
Post by: ENVYD on February 19, 2008, 06:13:55 PM
not sure its more testing the water mate! seen another rx7 i like down south!
Title: compression results
Post by: ENVYD on February 20, 2008, 02:58:17 PM
well i got the the results they are!
 
rpm, rpm
256 252
 
rotar1, rotar2
6.5, 6.8
7.3, 6.9
6.7, 7.2
 
what you all think?
Title: compression results
Post by: BlitzBoy on February 20, 2008, 03:06:10 PM
mid 6s to 7s is fine for a good few miles in IMO, below mid 6s on all three faces is when the tips or housings are starting to wear out and lose power
Title: compression results
Post by: sadgoth on February 20, 2008, 03:07:05 PM
that 7.3 on the first rotor is a bit out of line with the other two readings...

depends on how much the car is up for really...
Title: compression results
Post by: ENVYD on February 20, 2008, 03:09:23 PM
Quote from: sadgoththat 7.3 on the first rotor is a bit out of line with the other two readings...
 
depends on how much the car is up for really...

yeah i know thats what i thought! dont know if i should judt try and get it rebuilt anyways!
Title: compression results
Post by: rmagictastic on February 21, 2008, 08:13:12 AM
agree with blitzy boy, that would indicate life in the girl yet!!

Rmaj