Engine Rebuild help!? - newbie :-(

[deanflowers]

you could be lucky and it end up costing you about a grand to fix doing it yourself, but on the other hand you could end up with an engine like mine and end up spending £2000 on the bits you require.

definaely worth getting your parts checked over though as said

[probedb]

I plan on stripping it myself and getting someone to check the parts and if I have the cash to do some porting for me. It\'s more fun doing it yourself and you\'ll learn about the engine that way as well, just make sure you\'re patient and don\'t rush anything. Think I need to buy a heater for the garage this winter so I can work on mine

[antrosser]

yeah i was thinking the same, i think it would be interesting to do it myself too (And hopefully save me some money as well)! lol. Althought there is a re built engine on ebay at the mo which will work out cheaper to buy probably!?

http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=4639583274&rd=1&sspagename=STRK%3AMEWA%3AIT&rd=1

pushing out 7.5bar, dont know whether that is good or not

[vxer]

yeah i was thinking the same, i think it would be interesting to do it myself too (And hopefully save me some money as well)! lol. Althought there is a re built engine on ebay at the mo which will work out cheaper to buy probably!?

http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=4639583274&rd=1&sspagename=STRK%3AMEWA%3AIT&rd=1

pushing out 7.5bar, dont know whether that is good or not

That ebay engine looks interesting, although note that with the tool he shows in the pictures measuring the pressure, will only show the highest compression beat for each chamber. You really need 6 readings to be totally sure, like:

front: 7.5 7.5 7.5
rear: 7.5 7.5 7.5

I\'m not saying that this engine is dodgy, its just that there is a specialised tool to read the compression more fully.

Btw, 7.5 BAR on all beats for both chambers is very good.

Cheers, Paul.

[antrosser]

sounds like they may be trying to pull a fast one then. you might as well spend more money and get your own done, therefore you know its been done properly...well would hope anyway!

so is there anyone on here that likes to re build their own engines?

[Nobbie]

Also try and get the workshop manuals for the rex\', i\'m still learning them, ready for doing pretty much the same as you.

Good Luck

[antrosser]

Are you a novice to all of this as well?

[Nobbie]

Yup, looking to buy an fd for about £3k, then rebuild it when it needs it. IMO even if you buy one for £6k, (present co excepted), it\'ll need a re-build.
I\'ve built 4-pot race engines so know my general engine stuff, but the rotary is a whole other deal, but after digesting the manual it actually looks pretty simple as long as it hasn\'t been really overheated.

[vxer]

sounds like they may be trying to pull a fast one then.

Well, i wouldn\'t go that far... Maybe they just don\'t realise?

Another thing you should remember with buying an engine is that you have to pay about £900 to get it fitted professionally. Unless you wanna do that yourself, that is...

Ta, Paul.

[nikp]

I\'m currently doing a home rebuild myself, and it\'s still costing £1700 just to get the engine built (Ok, £300 of that includes porting work)

That will only get my engine rebuilt too: My turbos have too much play in, so am upgrading to single turbo. There\'s more cost involved in that too!

[antrosser]

possibly they didnt realise. i think i may buy one of these dvd\'s that tells you everything about how to rebuild them and walk through the steps myself. i think it would be an interesting learning curve for me. im just worried about gettin the engine out and disconnecting it from the gearbox etc...

all fun though i guess. if everything goes t*ts up then i can always just get someone to finish it off!  :flamed

[antrosser]

wow, im looking at a master rebuild kit on ebay (http://cgi.ebay.com/ebaymotors/Master-Rebuild-Kit-for-93-95-Rotary-Engine-Rx7-REW_W0QQcmdZViewItemQQcategoryZ34202QQitemZ4638889451QQtcZphoto) for $1200, which is roughly around £700 isnt it? hopefully i wont need to get new rotar housings too (although i wouldnt even know if i did need them!). i might purchase a new water pump etc. at the same time as it will all be out. im not even sure of the condition of the turbo\'s which will probably need looking into as well. so much work, so hopefully get cracking with it this summer!

althought someone said they may be able to do it for me for £800, so may just leave it in their hands! i need to get mine ported and polished too as well in order to increase the bhp a bit as well. what does this actually do? i dont understand how it works.

also, why does putting a single turbo on it better than having two?

[nikp]

Well, i have to have 2 new rotor housings, and the front plate too. That swallows up £800 alone. Then the prting is £300 (Opens up the inlet and exhaust ports for better flowing of the gasses = more power).

A single turbo means ditching the complicated twins, that are prone to boosting issues. And going for a bigger single one that can compress more air than both the singles together. So, you get more power, and a more simple design. The downside being a bit more lag - but with modern turbos, it\'s not such an issue.

[Nobbie]

Talk to someone at WGT and Re-Worx about seals, they will supply them, and i\'d trust them more than a seller on ebay.

[Grizzly]

MMMM this day and age you get what you pay for.

If you want to do it on the Cheap //www.rotaryresources.com does some good Rebuild kits.

But if your Buget streches you are always going to be better using Mazda OE seals with 2pc Rx8 Apex\'s but you\'ll be paying more if the best place for OE stuff is //www.rxmotors.co.uk