View Full Version : Best vauxhall engine for mpg
fastcar1cars
05-10-11, 08:09 PM
Hi all got a c20xe in my nova at the moment! But finding miles per £20 a little low! Lol! Although smiles per mile are good!
What other vaux engine would go in a nova and be good for mpg? Cant b smaller than a 1.4! Lol!
Cheers
1.5TD, 70 odd on a run, quicker than a gsi with the boost turned up.
fastcar1cars
05-10-11, 08:13 PM
Not sure a can be arsed to go diesel! Lol!
Southie
05-10-11, 08:14 PM
Surely if your turning the boost up the mpg will be on it's **** though lol
Also depends on how heavy that right foot of yours is.
^^ surely that's not a easy fit to a nova tho? lol
^^ surely that's not a easy fit to a nova tho? lol
Dunno, but in answer to the title, its true lol
turbojolt
05-10-11, 08:27 PM
From what I have read when driving normally a xe nova should see 35+mpg, is this not the case??
fastcar1cars
05-10-11, 08:27 PM
Yeah right foot can be a little heavy! Lol! Gotta go in a nova! Get about 110 miles from my c20xe with a mix of fast and grandad driving!
brainsnova
05-10-11, 08:30 PM
Just add a Let and pay :d
Surely if your turning the boost up the mpg will be on it's **** though lol
Nope because unlike a petrol turbo it won't be running rich waiting for the boost to come on, and off boost it will be exactly the same running conditions/no throttle plate so no less from running less than WOT.
turbojolt
05-10-11, 08:40 PM
You only get 110 miles from a tank!!!!!
Try low revs and more throttle for a while, and see how that suits you.
fastcar1cars
05-10-11, 08:45 PM
110 miles from £20! Lol! Thats a mix of driving!
Southie
05-10-11, 08:46 PM
MK you were on about turning boost up though, so say compared to say a 1.6 or 1.4 I doubt they'd be much difference.
MK you were on about turning boost up though, so say compared to say a 1.6 or 1.4 I doubt they'd be much difference.
Are you aware how a turbo engine works? It won't be on boost constantly. Not unless you're russ swift and fancy fitting anti lag to a diesel.
turbojolt
05-10-11, 08:49 PM
110 miles from 20 quid don't.sound.bad at.all imo mate lol
110 miles from £20! Lol! Thats a mix of driving!
That's about 32mpg, you won't be doing much better without adjusting your driving to eco mode all the time, at least not in an aging petrol.
fastcar1cars
05-10-11, 08:53 PM
Ok ill put 20 in and drive like my nan! Lol!
What mpg do gte engines give?
Southie
05-10-11, 08:56 PM
Are you aware how a turbo engine works? It won't be on boost constantly. Not unless you're russ swift and fancy fitting anti lag to a diesel.
Surely if your turning boost up it's coming in constantly thus making the turbo run constantly though, this uses more petrol or diesel I suspect.
And no I know feck all.
Surely if your turning boost up it's coming in constantly thus making the turbo run constantly though, this uses more petrol or diesel I suspect.
And no I know feck all.
Won't come in unless it has something to spin it, I.E exhaust, so off of throttle is off of boost. In a TD you basically get a choice of either tickling along at 70mpg or whacking huge amounts of boost through it and having a giggle.
Southie, you ned to think of it similar to raising a rev limiter. If you go from 6k to 6.5k, the engine will be the same from 0-6k, its just you've allowed it to go that little bit higher - obviously you won't be on 6.5k all the time.
Ok, in terms of boost there's a little more too it than that (namely gain) but still.
For the record, I raised the boost on the GT4 from 0.9 to 1.1 and my fuel consumption went from 28mpg to 32mpg LMFAO
Southie
05-10-11, 09:06 PM
I want the giggle so thus reducing the MPG :p All I'm trying to do is prove the point that turning something up will obviously make some have less MPG than standard, if the TD engine had 70mpg it's not going to be the same when peeing about with it.
For the record, I raised the boost on the GT4 from 0.9 to 1.1 and my fuel consumption went from 28mpg to 32mpg LMFAO
Remapped? A lot of the better maps tend to improve the lower range, fiddle with the ign timing and fuel injector pulse times etc, more than 20% gain is impressive though :d
Nope, just an EBC with a few other mods which were fitted prior.
The stock ECU on a 205 does overfuel like mad though, so at least now its actually making use of the extra fuel lol
Overfuel by how much? Jap motors normally run lean for a turbo, but any turbo should be about 13.5:1 ish ideally, i.e on the lower end of safe/producing power. Just be careful nothing is going to start being melty.
Z22SE.... in the vx got 40mpg with pure ease and would rock upto 45mpg if you nursed it (and frankly nursing it was still quick enough as it has the torque of a 200bhp TB'd 20XE lol)
I want the giggle so thus reducing the MPG :p All I'm trying to do is prove the point that turning something up will obviously make some have less MPG than standard, if the TD engine had 70mpg it's not going to be the same when peeing about with it.
Yes it will, it will do 70 mpg on a run at 3psi, whether the max boost is 5psi or 28 bar.
Overfuel by how much?
Generally tried and tested. And lots, well enough to throw fire out the exhaust and kill the cat lol
[edit] The cav happily gets 50mpg too. Dunno how that compares to standard though!
Generally tried and tested. And lots, well enough to throw fire out the exhaust and kill the cat lol
That happens on a lean burn, no oxygen in the exhaust from running rich = no flames :p Rally cars etc run lean on the overrun, not rich! No power there, so no point chucking fuel in. If it lives/runs at the right ratios and it's well tested then fair enough. Just because it works doesn't mean it's healthy though.
remember the price of fuel though i used to put £5 in my xe about 4 years ago and that would last me a night out racing round £20 is only around 14-15 litres
Miles per £££ is a rubbish gauge of fuel economy anyway lol as fuel has nearly tripled in price since I started driving so what was 100 miles to a tenner is now £30 lol
Running a cat rich is fine, its lean that kills them as the gas temps are mental when lean and burns the face off the cat :s
turbojolt
05-10-11, 09:40 PM
Do you have a f16 or f20 gearbox mate
Southie
05-10-11, 09:43 PM
So basically all Nova's now need derv engines for fun and MPG... balls to that IMO, still down to the way you drive.
Nova_Tek
05-10-11, 09:47 PM
You can get good MPG out of big block 8v's too as Lynz can point out, you can also get good mpg in a LET if you drive carefully. Like Southie said down to the way you drive and what youo consider 'fun'.
So basically all Nova's now need derv engines for fun and MPG... balls to that IMO, still down to the way you drive.
I didnt particularly want a diesel but after driving one for a while they make perfect daily drivers imo. My next car will be a diesel and unless I get huge whacks of expendable income to blow on a fun petrol daily, the one after that probably will be too.
I didnt particularly want a diesel but after driving one for a while they make perfect daily drivers imo. My next car will be a diesel and unless I get huge whacks of expendable income to blow on a fun petrol daily, the one after that probably will be too.
I'm still not sold on dervs..... The passat wagon does do low 50's on a run BUT the drive to work gets about 42mpg, and the clio will do 40mpg, meaning the clio is cheaper to run for work lol
Southie
05-10-11, 09:52 PM
MK I want an arm wrestle, as your a mosh/rock guy we'll let Black Sabbath play in the background to make it more interesting lol
fastcar1cars
05-10-11, 09:58 PM
Ive got a f16 c/r in mine
That happens on a lean burn, no oxygen in the exhaust from running rich = no flames :p Rally cars etc run lean on the overrun, not rich! No power there, so no point chucking fuel in. If it lives/runs at the right ratios and it's well tested then fair enough. Just because it works doesn't mean it's healthy though.
As I understand it (i.e. told by people who know the engines better than I do lol) toyota made them run rich instead of lean - which makes sense if lean does more damage than rich. I know mine throws fuel down the exhaust, seen it dripping lol, and just assumed the odd pop and flame was that igniting.
I did accidentaly overboost when setting the EBC up and it didn't sound happy lol
Z22SE.... in the vx got 40mpg with pure ease and would rock upto 45mpg if you nursed it (and frankly nursing it was still quick enough as it has the torque of a 200bhp TB'd 20XE lol)
Off topic a bit but, how easy is it to fit a Z22SE in to a nova?
Easiest would be a Z22SE from anything and then use the VX ecu as it can cope with nearly no other control units. Needs an ABS sensor to square pulse converter to give the ECU speed though.
turbojolt
05-10-11, 10:01 PM
Ive got a f16 c/r in mine
So instead of switching engines why don't you.try different boxes and see if it helps
steviegsi
05-10-11, 10:12 PM
I can't remember the last time I seen 100 miles to £20.
£20 of bp ultimate got me just under 14 ltrs and should get me around 60 miles .
The last time I filled a nova it was £25.
fastcar1cars
05-10-11, 10:17 PM
I can't remember the last time I seen 100 miles to £20.
£20 of bp ultimate got me just under 14 ltrs and should get me around 60 miles .
The last time I filled a nova it was £25.
What engine mate?
steviegsi
05-10-11, 10:21 PM
4.4 v8 lol . But in it's defence I only live 6 mile from work so it does a wee bit better on a longer run.
Southie
05-10-11, 10:24 PM
Stevie, please do a WIP i'm soooooo excited by this, do I need a Limo lol
steviegsi
05-10-11, 10:27 PM
V8 obviously ain't in a nova southie lol
fastcar1cars
05-10-11, 10:28 PM
4.4 in a nova??
fastcar1cars
05-10-11, 10:28 PM
Lol!
nova xe with f20 best mpg 46.2
nova xe with f16cr best mpg 38
Calculated proper method, filling tank to full then working out by litres used etc.
So F20 is better for mpg, can put longer 5th from f18 in if you use motorways a lot.
xe is SOO much more fun with a f16 though
turbojolt
05-10-11, 10:49 PM
But surely as a every day car a f20 would be best
turbojolt
05-10-11, 10:51 PM
How much would someone be looking at having the 5th from a f18 into a f20
Peanut_119
05-10-11, 11:03 PM
nova xe with f20 best mpg 46.2
nova xe with f16cr best mpg 38
Calculated proper method, filling tank to full then working out by litres used etc.
So F20 is better for mpg, can put longer 5th from f18 in if you use motorways a lot.
i have a cavalier with a XE with a F16 and i can get anything upto 130 miles to £20 (£1.31.9) which i don't think is all that bad considering the weight difference between a nova and a cavalier
20 / 1.319 = 15.16 litres
130 / 15.16 * 4.546 = 39mpg
just join the AA, and when you think you've had enough, call them to collect you.... just like the vw bus crowd do
Jon_nova1
06-10-11, 08:51 AM
i've got the isuzu 1.7TD in my nova on an F28, its great fun and fuel lasts too lol
w_wall_2001
06-10-11, 08:52 AM
my let gte on an f20 is pretty reasonable as long as you drive it normally, i was surprised how well it is. It cost me £70 using super unleaded to get to pv last year, have 4 runs up the strip and drive home. hopefully when the f28 goes in it will be better on a run.
General Baxter
06-10-11, 12:54 PM
not a nova but my old 1.7td cav, tuned to 100bhp, with 250K miles on the clock did 77mpg whiles towing a ton of dolly and 1/2 ton of nova, up and down the hills on the a14 lol
i got 80ish iirc from a 110 pug 406 hdi
i can get 36mpg at a push from my 2.2 16v auto omega, book says 25mpg so beat that :thumb:
you need a c20xe on a F17 diesel WR box, thats epic, does 90mph in 2rd lol
2nd = second
3rd = third
does that mean 2rd = turd???
£20 in my cav does 120ish miles and thats a heavy cav being 4x4 lol
to gain mpg you sacrifice smg, its just not worth it.
General Baxter
06-10-11, 04:50 PM
smiles per gallon?
thats a lie, when i boot the omega, it drops to about 6-8mpg, and i still dont smile lol
Can i ask, what the capacity of the fuel tank is on a nova, I've been unable to find this anywhere?
Why do so many people think this? Balley's TD off here is well messed with apparently and does slower 1/4's than a standard Gsi!
XE's in novas are awesome for economy tbh! Ive seen around the 45-50 mpg from mine on the drive down south to pod/billing.
Baxter-To get 80mpg from a 10year old pug hdi, you must of been getting tow'd lol lol
General Baxter
06-10-11, 09:09 PM
Baxter-To get 80mpg from a 10year old pug hdi, you must of been getting tow'd lol lol
56mph all the way behind a lorry ;)
i have allways been good on the mpg front ;)
it only cost me £45 to do the rolling road run and back in the 2.8 6 cylinder bmw, that was something dumb like 350miles lol
Why do so many people think this? Balley's TD off here is well messed with apparently and does slower 1/4's than a standard Gsi!
Dunno how you figured that as mine ran a 17.2 at maybe 1 psi above standard boost, with a sickly turbo.
Dunno how you figured that as mine ran a 17.2 at maybe 1 psi above standard boost, with a sickly turbo.
Balley ran a 16.4 with whatever spec he has but not standard. Standard GSi runs about 16.2 hence faster.
General Baxter
06-10-11, 10:11 PM
adam, heres a photo of the old pugs mpg, this was after a week of being a tard, so its average lol
67.3mpg
now think on a 56mph 300mile round trip ;)
http://i11.photobucket.com/albums/a191/baxters83/IMG_0125.jpg
A let, best mpg i've even got. (35 on a good long run)
peester
07-10-11, 06:28 AM
Non diesel options: If you want to swap engines, i say try an x18xe1 - theyre good on mpg in the cars theyre found in, so a nova should do even better.
Maybe keep way from close-ratio f13/f15 gearboxes though to improve mpg further still..?
Im guessing your existing engine could just be out of tune though- over fuelling slightly; a recondition would help/sort your issues maybe; or again switch to a long ratio gearbox perhpas..?
Non diesel options: If you want to swap engines, i say try an x18xe1 - theyre good on mpg in the cars theyre found in, so a nova should do even better.
Maybe keep way from close-ratio f13/f15 gearboxes though to improve mpg further still..?
Im guessing your existing engine could just be out of tune though- over fuelling slightly; a recondition would help/sort your issues maybe; or again switch to a long ratio gearbox perhpas..?
The Z18 (I think, ETB one in the mk4 astra) is pretty much the worst consumption VS power/fun car I've ever driven lol.... saying that it was a riot of a car to drive if the fuel costs were ignored.
The best thing to do on small block cars is to fit the wr 5th gear into the cr box. So you get the acceleration, but still have a motorway gear
Jon_nova1
07-10-11, 05:44 PM
Balley ran a 16.4 with whatever spec he has but not standard. Standard GSi runs about 16.2 hence faster.
thats why you need the isuzu 1.7TD, 10BHP less than the GSI with 1/3 more torque, worked it out today, nova guage says it cost £2 for 25 miles
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