RX-8 LPG Conversion
#51
Hi all,
Sorry for the long delay.
The gas conversion was a faliure, i was without my car for a total of 28 days having had 2 seperate gas systems fitted and even then they could not get it to run right, There was a delay in throttle responce from tickover which sometimes the rev's dropes so low it cut out, it would start back up but would automatically be on petrol then swap to gas and it was not a plesent swap over and between 4000 - 5000 reves it was seriously holding back, The 231 is a 6 port engine compared to the 192 which is a 4 port engine and they could not control when the two additional ports were going to open so as a result could not compensate with gas injection, I ended getting a full refund after i told the company to remove there system.
Sorry guys but it was worth a shot!!!!!![Worship](https://www.rx8club.com/images/smilies/worship.gif)
Sorry for the long delay.
The gas conversion was a faliure, i was without my car for a total of 28 days having had 2 seperate gas systems fitted and even then they could not get it to run right, There was a delay in throttle responce from tickover which sometimes the rev's dropes so low it cut out, it would start back up but would automatically be on petrol then swap to gas and it was not a plesent swap over and between 4000 - 5000 reves it was seriously holding back, The 231 is a 6 port engine compared to the 192 which is a 4 port engine and they could not control when the two additional ports were going to open so as a result could not compensate with gas injection, I ended getting a full refund after i told the company to remove there system.
Sorry guys but it was worth a shot!!!!!
![Worship](https://www.rx8club.com/images/smilies/worship.gif)
We knew that it's a different engine, and knew that failure was a possibility. I really wished it would have worked out, because BRC seems to really be one of the best systems around.
I have done some research on well running RX-8, and the only ones I could find were from STAG and they seem to run great. You can't tell the difference whether they drive on LPG or Benzin, atleast as far as you can see it in the video.
It's the same system that Anubis is using, and there was another british and a serbian RX-8 running on the STAG system, both shown by the installers. As Anubis has told me, it has a "Rotary/Wankel" mode in the STAG ECU which enables the system to run on the RX smoothly.
For the 2nd try I will go for the STAG system, and we will contact STAG beforehand to make sure whether and how it can be done on a Renesis HP.
#52
Hi everyone, I thought I might chime in as well. I have the high powered 231 6 speed manual and running on LPG 2+ years now. There are 2 options for successful conversion. 1 the JTG Icom which injects liquid gas straight into the rotors and does not require a piggy back ECU, you will actually get more power with this system than running on gasoline, the downside is that it is very expensive, the positive is increased power and all control is done by the factory ECU. I have a normal vaporizer system by Bigas which has its own ecu, so a piggy back that receives info through OBD and the factory ECU. In order however to maintain the full power output of the engine, ie no difference from gasoline in all aspects it is set up to enhance with gasoline at certain RPM between 2000 and 9000 and only under certain load. So when cruising it only uses LPG and when power is needed it supplements with gasoline. The savings are huge and there is no need for extra lubrication as gasoline that I premix is quite often supplied along with the LPG. The system is dirt cheap as well, it was tuned on a dyno, it took 2 days total and cost about 700 Euro. Car starts and runs great both hot and cold. Downside is a lumpy idle nothing major on lpg only and when starting from hot as it starts on petrol and then switches over to gas. The factory ECU learns the fuel trims on LPG at idle so it doesn't like gasoline at idle. I have personally tuned this to switch over in less than 5 seconds with a hot engine, once in LPG it runs fine. So no real biggy. In summer on very hot days and all accessories on acc etc it occasionally stalls, but I have narrowed that down to fine tuning that I will perform via laptop this summer. Other than that, its great. I highly recommend the conversion.
#55
#56
hi to all of you here!!
im a massive fun of rx-8 and im thinking of buying it but the consumption (10 ltr/100km/h) with petrol is too much and i was thinking to install a lpg...help me please...can i keep the rx-8 if i put lpg?
im a massive fun of rx-8 and im thinking of buying it but the consumption (10 ltr/100km/h) with petrol is too much and i was thinking to install a lpg...help me please...can i keep the rx-8 if i put lpg?
#62
Smoking turbo yay
^Yep.
Conversion itself will cost quite a bit of money, and where do you plan on storing the LPG? I don't think the stock gas tank will do.
Buy a Miata if gas mileage is a concern.
Oh and yeah, driving more slowly on highways/motorways helps. I am not saying be the grandma in her Corolla, but 130km/h is pretty fast. Slow down, sport.
Conversion itself will cost quite a bit of money, and where do you plan on storing the LPG? I don't think the stock gas tank will do.
Buy a Miata if gas mileage is a concern.
Oh and yeah, driving more slowly on highways/motorways helps. I am not saying be the grandma in her Corolla, but 130km/h is pretty fast. Slow down, sport.
Last edited by UnknownJinX; 03-28-2019 at 05:03 PM.
#64
^Yep.
Conversion itself will cost quite a bit of money, and where do you plan on storing the LPG? I don't think the stock gas tank will do.
Buy a Miata if gas mileage is a concern.
Oh and yeah, driving more slowly on highways/motorways helps. I am not saying be the grandma in her Corolla, but 130km/h is pretty fast. Slow down, sport.
Conversion itself will cost quite a bit of money, and where do you plan on storing the LPG? I don't think the stock gas tank will do.
Buy a Miata if gas mileage is a concern.
Oh and yeah, driving more slowly on highways/motorways helps. I am not saying be the grandma in her Corolla, but 130km/h is pretty fast. Slow down, sport.
I have a 45L LPG tank in my trunk. Took about 1/3 of by trunk or translated, it's a little bit more than a carry on luggage hardcase.
If I need more room, you can get a skibox. In any case, I always had plenty of space to take 4 people with me on international drives.
Consumption is worse because you will redline it every chance you get, mostly. Otherwise, I still managed to get to 260km on 35 liters, which translates to 13,5L/100km on highway driving at 130km/h.
Having to refuel often is a small price to pay to get great savings and invest those savings in a new engine. Mine got pulled apart at 110.000km, failure due to a clogged oil nozzle and otherwise wear and tear that dropped the compression to 4-4,5 bar. Internals looked otherwise fine after having driven for 10.000km on LPG.
#66
Hello everyone. I'm looking to buying an RX-8 for a future "project car" but until then i want to use it first for weekend-drive.But I'm a student and don't have the money to throw on Petrol. With what I have heard, LPG could be one option to go but I have also heard that rotary with lpg don't go together. Can anyone here help me with that task. The difference in price is so big because in Greece petrol is 1.6e/ltr and lpg is 0.7e/ltr. and with the small consuption change of lpg the price/km of lpg is pretty much half of petrol.
#67
Niko, file mou,
εχω lpg εδώ και 6000 χλμ. Rotaries και lpg πανε μια χαρά μαζί γιατί μειωνονται οι επικαθισεις άνθρακα. Καλή εγκατάσταση θες μονο.
i have been lpg for 6000 km. Rotaries and lpg have been fine together because carbon deposits are decreased. You'll need a good installation only.
εχω lpg εδώ και 6000 χλμ. Rotaries και lpg πανε μια χαρά μαζί γιατί μειωνονται οι επικαθισεις άνθρακα. Καλή εγκατάσταση θες μονο.
i have been lpg for 6000 km. Rotaries and lpg have been fine together because carbon deposits are decreased. You'll need a good installation only.
#68
https://www.youtube.com/watch?v=AzEw...ature=youtu.be
It's only in polish unfortunately. (Rotor on the left was used with LPG)
General issue is with too hight exaust gas temperature that will burn side seals. Unless LPG installation will accomodate that it's not recommeded to have LPG in RX-8
It's only in polish unfortunately. (Rotor on the left was used with LPG)
General issue is with too hight exaust gas temperature that will burn side seals. Unless LPG installation will accomodate that it's not recommeded to have LPG in RX-8
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sinkas (03-08-2020)
#69
Registered
https://www.youtube.com/watch?v=AzEw...ature=youtu.be
It's only in polish unfortunately. (Rotor on the left was used with LPG)
General issue is with too hight exaust gas temperature that will burn side seals. Unless LPG installation will accomodate that it's not recommeded to have LPG in RX-8
It's only in polish unfortunately. (Rotor on the left was used with LPG)
General issue is with too hight exaust gas temperature that will burn side seals. Unless LPG installation will accomodate that it's not recommeded to have LPG in RX-8
,
I think there is a chance that engine s sdie seals was gummed up before it went on to lpg,
but aslo the " Dry-ness" of lpg might contribute to needing better lubrication
#70
https://www.youtube.com/watch?v=AzEw...ature=youtu.be
It's only in polish unfortunately. (Rotor on the left was used with LPG)
General issue is with too hight exaust gas temperature that will burn side seals. Unless LPG installation will accomodate that it's not recommeded to have LPG in RX-8
It's only in polish unfortunately. (Rotor on the left was used with LPG)
General issue is with too hight exaust gas temperature that will burn side seals. Unless LPG installation will accomodate that it's not recommeded to have LPG in RX-8
The following users liked this post:
sinkas (03-09-2020)
#71
Registered
My friend, the only correct way to know what lpg does is to get a new engine and run it on lpg, then open it and see what's the situation inside. Also, my installation allows lpg to be used on low rpm and engine load (highway and city driving). High rpm or engine load use gasoline premixed. So the car starts with gasoline, goes to lpg once the correct coolant temperature is there and will go back to gasoline if i rev too high.
#73
Smoking turbo yay
Kinda reminds me of the hydrogen RX-8 that can also run on gasoline.
It's a bit of over-engineering to me... But I guess you do you.
It's a bit of over-engineering to me... But I guess you do you.
#74
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