MACE Products with LPG/Dual Fuel

[HamaTime™]

Hey Steve (And for any LPG users out there)

Just wanted to know how compatible your Ecotec bolt on mods are with an air mixer LPG/Dual Fuel system...

Is there anything that might need to be changed/taken into consideration when applying mods such as

1. Plenum Spacer
2. CAI Manifold Insulator
3. 69m Throttle Body
4. Larger MAF

etc etc etc

Cheers

[MACE]

Hey HamaTime,

All of our mods are compatible with LPG. The only real concern I have with LPG are inlet backfires as in extreme cases that can even blow up plenum lids! So I wouldn't recommend running a plenum spacer if your experience inlet backfires on a consistent basis. An excellent mod to start off with on an LPG vehicle install a manifold insulator as this will noticeably improve low end driveablity some of which would have been lost with the extra weight of the gas system.

Cheers
Steve

[HamaTime™]

Ah ok I thought that could be the case.

My car rarely ever backfires, probably twice in the last year or so that I've owned it and it being on gas. The last instance was merely due to a loose air hose (connecting under the throttle body to behind the engine - pipe runs between the heads, under the plenum) and the backfire blew the hose off...

So I would be safe to assume that it would be safe to run a Plenum spacer, paired with a CAI manifold insulator?

[vxcalais_01]

Do u still recommend the tune for lpg when using the manifold insulator ?

[MACE]

Do u still recommend the tune for lpg when using the manifold insulator ?

It's not a bad idea to get air fuel ratios looked at with any mod petrol or LPG. I use to mention the fact that it may pay to have your LPG tune looked at because inconsistency between quality to crap installs. However given that LPG is more tolerant to knock then petrol is (higher octane rating) it would also be more forgiving if it were to run on the leaner side.

[vxcalais_01]

Yeah, isnt running rich, lpg's version of petrol running lean ?

[MACE]

Yeah, isnt running rich, lpg's version of petrol running lean ?

To be honest I'm not too familiar with LPG tuning behaviors so I can't say.

[HamaTime™]

Well in my experience with LPG, you need to be very careful with your mods, because each one mucks up the Air/fuel mixtures so...make sure you know what you are doing.

[MACE]

Well in my experience with LPG, you need to be very careful with your mods, because each one mucks up the Air/fuel mixtures so...make sure you know what you are doing.

Depending on the LPG system this may be true. Fortunately though the vast majority of the LPG systems that have been installed on cars are even easier to tune then carbies as they only have a single screw for mixture adjustment. This is for systems that run a venturi type mixer.

[HamaTime™]

Depending on the LPG system this may be true. Fortunately though the vast majority of the LPG systems that have been installed on cars are even easier to tune then carbies as they only have a single screw for mixture adjustment. This is for systems that run a venturi type mixer.

Exactly right. I have the air mixer system which as previously said is similar to a carby system. And it is fairly simple to change the mixtures which is a definate advantage.

[fkford]

Exactly right. I have the air mixer system which as previously said is similar to a carby system. And it is fairly simple to change the mixtures which is a definate advantage.

so you could tune the gas system youself?

[HamaTime™]

hmm possibly bro, but I wouldn't do it...I'd always take it up to my boys in Lilydale. I know alot of the guys up in the industrial plot there where all my car stuff is done so I get mad as prices.

[fkford]

hmm, so you reckon its worth getting my gas system serviced and tuned? does it run better when tuned? iv never had it tuned before so im guessing thats why it always ran like dogs balls

[MACE]

It certainly wouldn't hurt to get it tuned and inspected. Shouldn't be overly expensive to do either unless the gas tank needs to be retested etc or a gas converter needs to be cleaned.

[vxcalais_01]

hmm, so you reckon its worth getting my gas system serviced and tuned? does it run better when tuned? iv never had it tuned before so im guessing thats why it always ran like dogs balls

I know mace does tunes, but there is also another joint in Sunshine that put it on a dyno and tune the car in the higher revs (where lpg systems lack most from the restriction) and tune accordingly. As mentioned with previously, its easy to tune via the screw with the venturi system, but dont to yourself as you will not have the pipe up the bum unit to check the mixtures.

[carra909]

i was also wondering on the subject of lpg systems, would it be advisable to chuck in some higher ratio roller rockers into an vx v6 with a factory lpg system, what ratio would you suggest and will it need retuning

[MACE]

i was also wondering on the subject of lpg systems, would it be advisable to chuck in some higher ratio roller rockers into an vx v6 with a factory lpg system, what ratio would you suggest and will it need retuning

You'll be happy with either ratio. We sold these in the past to customers with a similar setup to yours who haven't undertaken a tune, however it's always a good idea to run a car up on a dyno (petrol or LPG) just to see how any new mod is performing

[vxcalais_01]

i was also wondering on the subject of lpg systems, would it be advisable to chuck in some higher ratio roller rockers into an vx v6 with a factory lpg system, what ratio would you suggest and will it need retuning

I have been running 1.95 YT rockers since 2006 and around 100,000k's. Back then it was only FIT and YT who did rockers and YT were a better deal as they offered pushrods in the price while FIT has then nearly $200 extra on top. They were dearer as well. Also YT where just down the road for me, so i liked the added security if i needed anything. They are also excellent to deal with, but haven't offered anything new for the v6 scene.

Stock springs etc, no tune all this time. Wait till you do a few mods and then tune. Mace offer pushrods now as well, and what seems to be a better customer service, so they would be the best choice now for me personally. They have a good net presence, quick response, and are doing heaps for the v6 scene. I would go the mace 1.98's.

Mace, you guys have your own lpg v6 with these mods on anyway don't you ? Also what would you charge, for say a lpg tune inspection etc ?

[MACE]

At the moment I don't have an LPG 6. Nor do we do LPG tunes, however I can recommend someone in the northern suburbs for that though. In saying this though I have a lot of respect for the fuel which is why I've taken the time to study it

[vxcalais_01]

Sorry Mace, for some reason i assumed you guys had one. The guy that does the tuning, does he dyno tune lpg does he ?

[MACE]

Na that's all good

He can dyno tune LPG system but he mainly road tunes them of which they've had experience with some serious LPG setups

Full Flight Engineering - Workshop Projects

The company is Full Flight Engineering

Ask for Jamie, tell him that Steve from MACE sent you, you should get looked after

Cheers
Steve

[vxcalais_01]

Thanks for that Mace. When i am ready i will chase them up.

[MACE]

You'll be glad you did

Cheers
Steve

[HamaTime™]

At the moment I don't have an LPG 6. Nor do we do LPG tunes, however I can recommend someone in the northern suburbs for that though. In saying this though I have a lot of respect for the fuel which is why I've taken the time to study it

So I'm guessing you wouldn't be able to do a memcal tune for a dual fuel V6?

[MACE]

So I'm guessing you wouldn't be able to do a memcal tune for a dual fuel V6?

Unless we could run twin maps (which we can't) then it will be tuned based on the "weaker" of the two fuels of which case it will be petrol. Unless you were willing to swap memcals over between fuel changes then that's all we could offer.