And the compression results are in...

Place for discussions about the RX-8
User avatar
Jeags
Club Member
Club Member
Posts: 81
Joined: Wed May 22, 2019 9:28 pm
RX-8: 231
Colour: Strato Blue
Location: North West (Chester)
Has thanked: 61 times
Been thanked: 12 times

And the compression results are in...

Post by Jeags » Fri Nov 01, 2019 4:20 pm

... Rotor 1 - 300rpm 5.1-5.25.3 250 rpm 4.4-4.5-4.5
... Rotor 2 - Comprssion too low to be registered.

Spoke to Dwayne about this, as he put it "it's one of the best condition 8's he's seen in a while, but the worst compression as well!". He's advised me not to premix or red line the car, said just to keep it mid range (3k in a 30) and hopefully carbon will clear. He reckons it is carbon build up as the last owner has probably never red lined it and it isn't even that high mileage (48k). I'll take his advice and hopefully it will slowly improve. Will go for another test after 6 months or so if the car still runs! Any more advice? Not the outcome I wanted but at least I know where I am with it!

Nickp47
Club Member
Club Member
Posts: 1000
Joined: Sat May 07, 2016 9:00 pm
RX-8: R3
Colour: Sparkling Black
Location: Maidenhead
Has thanked: 58 times
Been thanked: 103 times

Re: And the compression results are in...

Post by Nickp47 » Fri Nov 01, 2019 4:26 pm

I’m confused, won’t keeping the revs low cause more carbon buildup?
Hate to be negative but the engine sounds beyond the point of being saved by a regular Italian tune up, hopefully I will be proven wrong though.

User avatar
Jeags
Club Member
Club Member
Posts: 81
Joined: Wed May 22, 2019 9:28 pm
RX-8: 231
Colour: Strato Blue
Location: North West (Chester)
Has thanked: 61 times
Been thanked: 12 times

Re: And the compression results are in...

Post by Jeags » Fri Nov 01, 2019 4:30 pm

What I thought. But he thinks that redlining it would do more harm than good. It will need a rebuild, but he said hopefully if it doesn't die before then, he can clean most of it up and replace seals which should fix it! I wasn't too sure about it but I'm in no position to go against his word.

User avatar
MARKTHOMASBRAND
Club Member
Club Member
Posts: 12538
Joined: Mon May 10, 2010 1:29 am
Location: Stratford-Upon-Avon,Warwickshire.
Has thanked: 841 times
Been thanked: 786 times

Re: And the compression results are in...

Post by MARKTHOMASBRAND » Fri Nov 01, 2019 4:31 pm

Who's Dwayne :?:
Mark's : 2017 Honda Civic FK2 Type R Black Edition.

Mandy's : 2019 Mazda MX-5 30th Anniversary RF # 1761/3000.

Nickp47
Club Member
Club Member
Posts: 1000
Joined: Sat May 07, 2016 9:00 pm
RX-8: R3
Colour: Sparkling Black
Location: Maidenhead
Has thanked: 58 times
Been thanked: 103 times

Re: And the compression results are in...

Post by Nickp47 » Fri Nov 01, 2019 4:32 pm

Ok I see so more of a temporary solution than an attempt at a fix :thumright:

Nickp47
Club Member
Club Member
Posts: 1000
Joined: Sat May 07, 2016 9:00 pm
RX-8: R3
Colour: Sparkling Black
Location: Maidenhead
Has thanked: 58 times
Been thanked: 103 times

Re: And the compression results are in...

Post by Nickp47 » Fri Nov 01, 2019 4:33 pm

MARKTHOMASBRAND wrote:
Fri Nov 01, 2019 4:31 pm
Who's Dwayne :?:
59E249F6-315B-40B3-9F3D-6D2C22B68DF9.jpeg
59E249F6-315B-40B3-9F3D-6D2C22B68DF9.jpeg (328.81 KiB) Viewed 293 times
These users thanked the author Nickp47 for the post (total 3):
Vj4sothername (Fri Nov 01, 2019 4:35 pm) • Jeags (Fri Nov 01, 2019 4:38 pm) • Shagrington (Fri Nov 01, 2019 7:39 pm)

User avatar
Jeags
Club Member
Club Member
Posts: 81
Joined: Wed May 22, 2019 9:28 pm
RX-8: 231
Colour: Strato Blue
Location: North West (Chester)
Has thanked: 61 times
Been thanked: 12 times

Re: And the compression results are in...

Post by Jeags » Fri Nov 01, 2019 4:38 pm

:lol: He's a fella at a local rotary specialist (Silver Fern). Nice chap!

User avatar
New Duke
Club Member
Club Member
Posts: 1338
Joined: Sat Dec 03, 2016 8:38 pm
RX-8: R3
Colour: Sparkling Black
Location: Colchester, Essex
Has thanked: 445 times
Been thanked: 371 times

Re: And the compression results are in...

Post by New Duke » Fri Nov 01, 2019 4:39 pm

Please shop around before agreeing to have him do your rebuild. I hope 'clean most of it up and replace the seals' weren't his words. Call RRP when you're ready to rebuild, or bigpete may even be able to fit a working second hand engine for you quickly.

Sorry you got those results. Hopefully once it's sorted you'll finally get to experience the engine at full power.

@Mark and Nick, he's at Silver Fern Performance.
These users thanked the author New Duke for the post (total 2):
Vj4sothername (Fri Nov 01, 2019 5:13 pm) • Jeags (Fri Nov 01, 2019 5:18 pm)

User avatar
MARKTHOMASBRAND
Club Member
Club Member
Posts: 12538
Joined: Mon May 10, 2010 1:29 am
Location: Stratford-Upon-Avon,Warwickshire.
Has thanked: 841 times
Been thanked: 786 times

Re: And the compression results are in...

Post by MARKTHOMASBRAND » Fri Nov 01, 2019 4:43 pm

Jeags wrote:
Fri Nov 01, 2019 4:38 pm
:lol: He's a fella at a local rotary specialist (Silver Fern). Nice chap!
I remember seeing something posted about "Silver Fern" on here many moons ago & it was pretty controversial :p
Mark's : 2017 Honda Civic FK2 Type R Black Edition.

Mandy's : 2019 Mazda MX-5 30th Anniversary RF # 1761/3000.

User avatar
Ryan Rotary Performance
Forum Trader
Forum Trader
Posts: 1219
Joined: Fri Jan 27, 2017 8:06 pm
RX-8: Supercharged
Colour: Brilliant Black
Location: Rugby and Stonham Aspal
Has thanked: 141 times
Been thanked: 397 times

Re: And the compression results are in...

Post by Ryan Rotary Performance » Fri Nov 01, 2019 4:44 pm

Dont want to say any ill words but,

Its VERY inlikely to improve by any significant amount if at all! Not sure about the advice but my advice is to get it rebuilt either by him or another specialist.

Hopefully at the moment the plates and housings are all in good condition being such a low mileage car you'll get a much better (and cheaper) engine if you just do it now.

Thats my advice
These users thanked the author Ryan Rotary Performance for the post (total 2):
Jeags (Fri Nov 01, 2019 4:48 pm) • Velocity_Dan93 (Sun Nov 03, 2019 12:52 pm)

User avatar
Jeags
Club Member
Club Member
Posts: 81
Joined: Wed May 22, 2019 9:28 pm
RX-8: 231
Colour: Strato Blue
Location: North West (Chester)
Has thanked: 61 times
Been thanked: 12 times

Re: And the compression results are in...

Post by Jeags » Fri Nov 01, 2019 4:46 pm

Nickp47 wrote:
Fri Nov 01, 2019 4:32 pm
Ok I see so more of a temporary solution than an attempt at a fix :thumright:
Aye, being an apprentice money definitely isn't that good (would take me a considerable amount of months to save enough for a worst case scenario rebuild). Definitely will rebuild this though, love it to bits! Maybe have to see about getting a credit card... :shock: #-o

User avatar
Jeags
Club Member
Club Member
Posts: 81
Joined: Wed May 22, 2019 9:28 pm
RX-8: 231
Colour: Strato Blue
Location: North West (Chester)
Has thanked: 61 times
Been thanked: 12 times

Re: And the compression results are in...

Post by Jeags » Fri Nov 01, 2019 4:48 pm

Ryan Rotary Performance wrote:
Fri Nov 01, 2019 4:44 pm
Dont want to say any ill words but,

Its VERY inlikely to improve by any significant amount if at all! Not sure about the advice but my advice is to get it rebuilt either by him or another specialist.

Hopefully at the moment the plates and housings are all in good condition being such a low mileage car you'll get a much better (and cheaper) engine if you just do it now.

Thats my advice
Right, well it would take me a while to save up anyway so I guess no harm it trying his idea? I'm not expecting a miracle, just hopefully enough for the engine to survive while I save up!

User avatar
warpc0il
Spin Doctor
Spin Doctor
Posts: 22436
Joined: Sat Sep 06, 2008 10:56 pm
RX-8: 231
Colour: Lightning Yellow
Location: Groomsport, Co Down, NI
Has thanked: 306 times
Been thanked: 1186 times
Contact:

Re: And the compression results are in...

Post by warpc0il » Fri Nov 01, 2019 4:49 pm

With those results I'd be wondering if the rear stationary bearing has failed and the tail of the eccentric shaft is wobbling around, either that or there's a big score in one of rear iron surfaces.

Actually, the last time someone reported numbers like that it was finally tracked down to a broken spark plug, but then he did also have "a strange metallic clicking" which everyone was sure was the bearing, though it was the air escaping through the plug body. #-o
Dave
The Spin Doctor ™
uǝǝɹɔs ɹnoʎ ʇɹǝʌuı ǝsɐǝld :ɹoɹɹǝ

User avatar
Ryan Rotary Performance
Forum Trader
Forum Trader
Posts: 1219
Joined: Fri Jan 27, 2017 8:06 pm
RX-8: Supercharged
Colour: Brilliant Black
Location: Rugby and Stonham Aspal
Has thanked: 141 times
Been thanked: 397 times

Re: And the compression results are in...

Post by Ryan Rotary Performance » Fri Nov 01, 2019 4:51 pm

I'd drive it as little as possible until you save up TBH. At this point you're probably doing more harm than good.

User avatar
Jeags
Club Member
Club Member
Posts: 81
Joined: Wed May 22, 2019 9:28 pm
RX-8: 231
Colour: Strato Blue
Location: North West (Chester)
Has thanked: 61 times
Been thanked: 12 times

Re: And the compression results are in...

Post by Jeags » Fri Nov 01, 2019 4:58 pm

warpc0il wrote:
Fri Nov 01, 2019 4:49 pm
With those results I'd be wondering if the rear stationary bearing has failed and the tail of the eccentric shaft is wobbling around, either that or there's a big score in one of rear iron surfaces.

Actually, the last time someone reported numbers like that it was finally tracked down to a broken spark plug, but then he did also have "a strange metallic clicking" which everyone was sure was the bearing, though it was the air escaping through the plug body. #-o
I wish it was that, he checked the plugs and said they were good. I haven't a clue tbh. I guess time will tell.

Vj4sothername
Club Member
Club Member
Posts: 404
Joined: Fri Sep 06, 2019 6:40 pm
RX-8: 231
Colour: Brilliant Black
Location: Oxford
Has thanked: 185 times
Been thanked: 61 times

Re: And the compression results are in...

Post by Vj4sothername » Fri Nov 01, 2019 5:16 pm

New Duke wrote:Please shop around before agreeing to have him do your rebuild. I hope 'clean most of it up and replace the seals' weren't his words. Call RRP when you're ready to rebuild, or bigpete may even be able to fit a working second hand engine for you quickly.

Sorry you got those results. Hopefully once it's sorted you'll finally get to experience the engine at full power.

@Mark and Nick, he's at Silver Fern Performance.
Keep an eye out and if you get lucky a cheap engine that runs may come up. I was luck (with help from here) and bagged one for 300. Run that while saving to get yours rebuilt.
These users thanked the author Vj4sothername for the post (total 2):
New Duke (Fri Nov 01, 2019 5:20 pm) • goodeggbob (Fri Nov 01, 2019 5:32 pm)
S1 - 231 - brilliant black
Feb 08 built,
Fake Toyosport back box,
Dents,
Scratches,
Replacement engine,
Smiles

User avatar
Jeags
Club Member
Club Member
Posts: 81
Joined: Wed May 22, 2019 9:28 pm
RX-8: 231
Colour: Strato Blue
Location: North West (Chester)
Has thanked: 61 times
Been thanked: 12 times

Re: And the compression results are in...

Post by Jeags » Fri Nov 01, 2019 5:19 pm

Vj4sothername wrote:
Fri Nov 01, 2019 5:16 pm
New Duke wrote:Please shop around before agreeing to have him do your rebuild. I hope 'clean most of it up and replace the seals' weren't his words. Call RRP when you're ready to rebuild, or bigpete may even be able to fit a working second hand engine for you quickly.

Sorry you got those results. Hopefully once it's sorted you'll finally get to experience the engine at full power.

@Mark and Nick, he's at Silver Fern Performance.
Keep an eye out and if you get lucky a cheap engine that runs may come up. I was luck (with help from here) and bagged one for 300. Run that while saving to get yours rebuilt.
Nice idea. I'll keep an eye out, cheers.

Vj4sothername
Club Member
Club Member
Posts: 404
Joined: Fri Sep 06, 2019 6:40 pm
RX-8: 231
Colour: Brilliant Black
Location: Oxford
Has thanked: 185 times
Been thanked: 61 times

Re: And the compression results are in...

Post by Vj4sothername » Fri Nov 01, 2019 5:35 pm

Jeags wrote:
Vj4sothername wrote:
Fri Nov 01, 2019 5:16 pm
New Duke wrote:Please shop around before agreeing to have him do your rebuild. I hope 'clean most of it up and replace the seals' weren't his words. Call RRP when you're ready to rebuild, or bigpete may even be able to fit a working second hand engine for you quickly.

Sorry you got those results. Hopefully once it's sorted you'll finally get to experience the engine at full power.

@Mark and Nick, he's at Silver Fern Performance.
Keep an eye out and if you get lucky a cheap engine that runs may come up. I was luck (with help from here) and bagged one for 300. Run that while saving to get yours rebuilt.
Nice idea. I'll keep an eye out, cheers.
Mine was found on the rx8 classifieds UK Facebook page. It came out of a running car for an engine swap. He did have a second engine for the same price.

Swapping isn't massively hard if you have everything. Namely a crane (you can rent one). I did mine 95% on my own (the Mrs helped with crane control while I lined everything up). Took me 4 days to get out and in. That's on my driveway with 2 stands and a lot of faffing. My knowledge of this was online guides, changing brake pads and discs experience and a butt load of enthusiasm.

I think in a proper garage I could do it in 2 days maybe 1 long day (18hours). I'd expect a pro could do it in less still.

I'll egg on everyone in to do it themselves as I found it very rewarding. But it could give you a rough idea of getting an experts cost £x X 18 hours = £etc

If there's enough work near by Luke maybe willing to travel up.
Last edited by Vj4sothername on Fri Nov 01, 2019 5:35 pm, edited 1 time in total.
S1 - 231 - brilliant black
Feb 08 built,
Fake Toyosport back box,
Dents,
Scratches,
Replacement engine,
Smiles

njkmr
Club Member
Club Member
Posts: 3170
Joined: Mon Oct 30, 2017 7:08 pm
RX-8: Kuro
Colour: Kuro Black
Location: Lancs
Has thanked: 73 times
Been thanked: 101 times

Re: And the compression results are in...

Post by njkmr » Fri Nov 01, 2019 5:37 pm

Vj4sothername wrote:
Fri Nov 01, 2019 5:16 pm
New Duke wrote:Please shop around before agreeing to have him do your rebuild. I hope 'clean most of it up and replace the seals' weren't his words. Call RRP when you're ready to rebuild, or bigpete may even be able to fit a working second hand engine for you quickly.

Sorry you got those results. Hopefully once it's sorted you'll finally get to experience the engine at full power.

@Mark and Nick, he's at Silver Fern Performance.
Keep an eye out and if you get lucky a cheap engine that runs may come up. I was luck (with help from here) and bagged one for 300. Run that while saving to get yours rebuilt.

Great advice.
Don't destroy what may be a fairly good set of engine parts now.
Get a cheap temporary replacement to ride around with whilst saving up. :thumright:

User avatar
Jeags
Club Member
Club Member
Posts: 81
Joined: Wed May 22, 2019 9:28 pm
RX-8: 231
Colour: Strato Blue
Location: North West (Chester)
Has thanked: 61 times
Been thanked: 12 times

Re: And the compression results are in...

Post by Jeags » Fri Nov 01, 2019 5:52 pm

So just to be clear, you're suggesting I could find an engine that runs, swap it out for my poorly one and get that poorly one rebuilt and then swap it back in? If so, it's definitely a possibility, I guess i'd sell the engine I bought to run around after my old one was fixed?

Vj4sothername
Club Member
Club Member
Posts: 404
Joined: Fri Sep 06, 2019 6:40 pm
RX-8: 231
Colour: Brilliant Black
Location: Oxford
Has thanked: 185 times
Been thanked: 61 times

Re: And the compression results are in...

Post by Vj4sothername » Fri Nov 01, 2019 5:56 pm


Jeags wrote:So just to be clear, you're suggesting I could find an engine that runs, swap it out for my poorly one and get that poorly one rebuilt and then swap it back in? If so, it's definitely a possibility, I guess i'd sell the engine I bought to run around after my old one was fixed?
Well it's up to you. I've kept my dead one as a project to rebuild. If the replacement one is good you can just run that and sell the old one for parts.
These users thanked the author Vj4sothername for the post:
Jeags (Fri Nov 01, 2019 5:58 pm)
S1 - 231 - brilliant black
Feb 08 built,
Fake Toyosport back box,
Dents,
Scratches,
Replacement engine,
Smiles

goodeggbob
Club Member
Club Member
Posts: 5636
Joined: Sun Feb 18, 2018 1:12 pm
RX-8: Kuro
Colour: Kuro Black
Location: oswestry shropshire
Has thanked: 378 times
Been thanked: 459 times

Re: And the compression results are in...

Post by goodeggbob » Fri Nov 01, 2019 6:13 pm

Hi there,i ,along with john,have had good luck with buying engines. as said before,contact big pete and see if he can help. in my opinion,there is nothing wrong with having a reserve engine,especially if you are keeping the car for a while. also ,i have a ramp here that you are welcome to use,and not that far from you,see my other thread about ramp meet,rob.
These users thanked the author goodeggbob for the post:
Jeags (Fri Nov 01, 2019 6:19 pm)

Vj4sothername
Club Member
Club Member
Posts: 404
Joined: Fri Sep 06, 2019 6:40 pm
RX-8: 231
Colour: Brilliant Black
Location: Oxford
Has thanked: 185 times
Been thanked: 61 times

Re: And the compression results are in...

Post by Vj4sothername » Fri Nov 01, 2019 6:17 pm

goodeggbob wrote:Hi there,i ,along with john,have had good luck with buying engines. as said before,contact big pete and see if he can help. in my opinion,there is nothing wrong with having a reserve engine,especially if you are keeping the car for a while. also ,i have a ramp here that you are welcome to use,and not that far from you,see my other thread about ramp meet,rob.
10/10 recommend Robs ramp. Robs ace too! Pete's a great guy with a large selection of parts and put up with my nonsense. 10/10 would order again.
Last edited by Vj4sothername on Fri Nov 01, 2019 6:17 pm, edited 1 time in total.
S1 - 231 - brilliant black
Feb 08 built,
Fake Toyosport back box,
Dents,
Scratches,
Replacement engine,
Smiles

User avatar
Jeags
Club Member
Club Member
Posts: 81
Joined: Wed May 22, 2019 9:28 pm
RX-8: 231
Colour: Strato Blue
Location: North West (Chester)
Has thanked: 61 times
Been thanked: 12 times

Re: And the compression results are in...

Post by Jeags » Fri Nov 01, 2019 6:19 pm

Cheers for all your help guys, will start investigating options now!

Vj4sothername
Club Member
Club Member
Posts: 404
Joined: Fri Sep 06, 2019 6:40 pm
RX-8: 231
Colour: Brilliant Black
Location: Oxford
Has thanked: 185 times
Been thanked: 61 times

Re: And the compression results are in...

Post by Vj4sothername » Fri Nov 01, 2019 6:22 pm

Jeags wrote:Cheers for all your help guys, will start investigating options now!
Any questions drop me a pm.

If it was to all work out time wise I could be tempted with another trip to robs.
These users thanked the author Vj4sothername for the post:
Jeags (Fri Nov 01, 2019 6:23 pm)
S1 - 231 - brilliant black
Feb 08 built,
Fake Toyosport back box,
Dents,
Scratches,
Replacement engine,
Smiles

Post Reply

Return to “RX-8 Discussion”