POLL: Has Your engine died with less than 10k miles on it?

[dthebuk]

sorry mate but theres people who have had 2 rebuilds plus on there rex,dont quite understand your point with taken rev limits to 9000rpm,in 99.9%of cases a rex engine will blow before a supra thats a fact!!.

http://www.cargurus.com/Cars/Price-c5715-1993-RX-7.html

http://www.theautochannel.com/vehicles/new/reviews/1998/solo9807.html


Those two links show the prices of the rx7(93) and the supra(98) as $22k(approx) and $40k respectively

allowing for inflation over 5 years, you could get an rx7 and 2 rebuilds for the price of a supra (disregarding big services) . If you consider the rebuilds as a 60-70k miles service that gets you around 180-210kmiles on one of the worlds best handling and looking cars.


to quote something i read on rx7 club

" Powerful   Cheap   Reliable....  you may only have two"


i rest my case

[michaelb]

Hi All

Well, my engine (the car is a RB Bathurst jap import) went bust after cavering around 27 K miles after a re-build( previvous owner had it done by RX Motors under a warrenty). I must add that, the car was almost stock with a HKS Supper Dragger exhaust system fitted.  The car never gave me any major trouble and the engine weas very strong....

then....

I have put in Apexi PFC, de cat, HKS Racing Suction Kit, air pump was removed and after market pulleys fitted.  Car was mapped for the above mods but unfortunately after the inspection of the engine by Powergains Motor Sport, they have  discovered that one of the flaps would not open up due to cracked housing thus creating over boost = engine pop.  (I am not a mechanic so excuse the terminology chaps)

Now I have done around 900 miles on the new engine (full rebuild with racing seals) and I intend to fit maybe a boost controller to avoid the boost creep.  I know that people say that the Apexi can stop the boost creep but I rather BE SAFE THE SORRY.

I also think that a lot of engines are not fully re-build and possible failing too soon due to partially worn parts.

Kerim at Power Gains Motor Sport warranties his work for 1 year bur he insists on a full re-build.

It is a real shame that no one can design or improve the rotary engine making it more durable and more suited to withstand detonation.

After the engine going pop tbh I am now frightened to step on the car in case it happens again….I have budgeted for a re-build but since I have had the re-build now ‘the budget’ does not allow for the next one soon.  People on here re-build the engines after only less then 10k according to the poll, that is terrible rally, as I said above, I wish someone would improve the design of the engine…..wishful thinking…

...I still refuse to drive anything else!!!

Regards,
Michaelb

[Timmy]

Boost creep can\'t be solved with a boost controller.

[michaelb]

Boost creep can\'t be solved with a boost controller.

OK, so if the car is overboosting then what is that called?  How can we protect our engines from boost creep ( on a twin turbo set up) and what is the cause of that?

Regards,
Michaelb

[Timmy]

Boost creep is because you can get enough exhaust to bypass the turbo via the wastegate, you can port it to make it bigger.
On the other hand you maybe mixed up with a boost spike which and solved with a boost controller, this is caused by the wastegate not opening soon enough.

[michaelb]

Boost creep is because you can get enough exhaust to bypass the turbo via the wastegate, you can port it to make it bigger.
On the other hand you maybe mixed up with a boost spike which and solved with a boost controller, this is caused by the wastegate not opening soon enough.

Hi

OK, thanks for that

Kerim said that the wastegate was not opening much (one of the flaps) so he fixed that by changing the cracked housing and also he has ported the exhaust port to allow better exhaust pass…

I guess I had a boost spike which damaged my engine…

Regards,
Michaelb

[Carl]

We at Hayward Rotary warranty engines for 2 years / 24000 miles,and we also warranty for detonation.
Regards
Carl

[rx7veilside]

well my car is on its third engine twice rebuilt by same co and then entrusted to hayward rotary /carl
nearly have running in miles done then will have it mapped by carl for 1bar
mine had all the upgrades in place both times
uprated fuelling/uprated ecu/mapped and still went pop
if it ever pops again i will either
1/SET FIRE TO THE BLOODY THING
2/PUT A STONKING LS1 V8 IN IT
i am paranoid about going on boost in the bloody thing..mine couldnt have had any further upgrades
it had the pump/injectors/ecu remap everything
fingers crossed third time lucky

[michaelb]

well my car is on its third engine twice rebuilt by same co and then entrusted to hayward rotary /carl
nearly have running in miles done then will have it mapped by carl for 1bar
mine had all the upgrades in place both times
uprated fuelling/uprated ecu/mapped and still went pop
if it ever pops again i will either
1/SET FIRE TO THE BLOODY THING
2/PUT A STONKING LS1 V8 IN IT
i am paranoid about going on boost in the bloody thing..mine couldnt have had any further upgrades
it had the pump/injectors/ecu remap everything
fingers crossed third time lucky

Hi
Same here mate, had mine re-build ( full re-build ) by Powergains Motor Sport ( wicked job) 1003 miles ago ( 2 months ago ) and now I am also paranoid to use the boost...

It looked like all was fine I had no warning and the engine went bust, incidentally I have been told that you really need a full re-build and more to be sure that the engine will last as often people re-build what went bust and still keep the second hand bits which defo will go sooner the new..

Regards,
Michaelb

[Timrxmotors]

Hi
Same here mate, had mine re-build ( full re-build ) by Powergains Motor Sport ( wicked job) 1003 miles ago ( 2 months ago ) and now I am also paranoid to use the boost...

It looked like all was fine I had no warning and the engine went bust, incidentally I have been told that you really need a full re-build and more to be sure that the engine will last as often people re-build what went bust and still keep the second hand bits which defo will go sooner the new..

Regards,
Michaelb

When you fitted the power fc,you could have set the boost cut,then it wouldn\'t have overboosted.I hope you have it set now!

[michaelb]

When you fitted the power fc,you could have set the boost cut,then it wouldn\'t have overboosted.I hope you have it set now!

that sounds like a great idea, is this something I can set my self?  If so is it OK to increase the boost by 5% or shoud I stick with stock boost?

Regards,
Michaelb

[jurgen]

that sounds like a great idea, is this something I can set my self?  If so is it OK to increase the boost by 5% or shoud I stick with stock boost?

Regards,
Michaelb

no mate get it mapped or it will blow you cant just wind the boost up on a rex its just not worth the risk, but you can with a supra lol

[michaelb]

no mate get it mapped or it will blow you cant just wind the boost up on a rex its just not worth the risk, but you can with a supra lol

Hi

What about setting the boost cut my self at the stock level?  Is it possible to do that on my own?  It should be, right?

Regards,
Michaelb

[Timrxmotors]

if you set the boost to .7 bar,as stock,then set the boost cut it will cut at .95 bar.

[antnicuk]

if you have an apexi, just get it mapped. It will run better, quicker and more MPG.  Every engine is different, especially after a rebuild.  Mapping it will tune it for your specific engine.