Hey folks,

I had a look through the search and such and gathered that for best fuel efficiency for a 2.6L carburetor 92 magna (manual) the best rpms to change gears is anything under 3000. Was just wondering what other people thought. Also, i like to accelerate as fast as i can (yes i know it's a stock magna haha) and was also wondering what the ideal rpm to change gears was for the best acceleration.
I have no mods done to the csar apart from stereo and visual and no intentions of being hoon, i just enjoy getting to the speed limit fast * shrug* it's a twiggy thing lol
cheers for any replies ppl

~twiggy~

er, lol

For economy, basically the best economy you're going to get is upshift at the earliest possible engine speed which allows the engine to accelerate in the next gear without labouring.

For speed, upshift at the highest engine speed where the engine still feels like it's pulling strongly. For me, that's about 5000rpm - even though the redline is 6250, there's nothing to be gained by revving past 5000 (unless I just want to make it to either 60 in first or 100 in second, but it would've been quicker to change gear anyway).

edit - redbook says your engine makes peak power at 5000rpm, so don't bother going past that.

Ok cheers, i figured the economy one was pretty basic as that's what i usually do (i know what speeds the car labours at in diff gears so i change according to speed rather than gear when tryna be economical)
And since the cars 16 years old now i might stick to anything 4800 or below just to be safe. Although i'm not sure i enjoy the sound of the engine at revs that high hahaha.
Cheers for the help

~twiggy~

Depends. I used to thrash mum's 1993 Liberty. The EJ22 screamed out to 6500rpm happily, we looked after it servicing wise and it never missed a beat. Had 374,000kms and still did whatever you asked it.

This is what it says in the owner's manual (Book came with the '92 TR ELITE i just bought)

MANUAL TRANSMISSION: (gear[shift point, km/h])

(gear 1-2[shift@15km/h]), (gear 2-3[shift@28-30km/h]), (gear 3-4[shift@35-60km/h]), (gear 4-5[shift@58-75km/h]).

In my experience the good ol' 4G54 Astron is a reasonably tough engine, and is quite happy to shift at 4000-5000RPM on a daily basis really, as long as it's allowed to warm up fully before pushing it past about 3000RPM.

p.s. my engine is EFI not carby, so i'm not sure how useful this will be now, sorry.

Depends. I used to thrash mum's 1993 Liberty. The EJ22 screamed out to 6500rpm happily, we looked after it servicing wise and it never missed a beat. Had 374,000kms and still did whatever you asked it.

Subaru's are bloody durable and strong, unfortunately Mitsu's wont quite stand up as well, but at the same time I dont think a bit of revving will hurt if the engine is properly maintainted.

Ollie

In my experience the good ol' 4G54 Astron is a reasonably tough engine, and is quite happy to shift at 4000-5000RPM on a daily basis really, as long as it's allowed to warm up fully before pushing it past about 3000RPM.

:naughty:

if you want efficiancey its pretty simple...apply as little throttle as possible. the more you put your foot down, the more petrol will be pumped into the motor regardless of how many rpms the motor is doing.

Subaru's are bloody durable and strong, unfortunately Mitsu's wont quite stand up as well, but at the same time I dont think a bit of revving will hurt if the engine is properly maintainted.

Ollie

i thrash mine a bit and its held up pretty good. change at about 4-5k plus its a first gen carby.. dunno if it helps

If you want it to last I wouldn't be revving it out to 4800RPM daily. Astrons aren't that good!

Keep it under 4k IMO. 5k is fine if you really want to get up and moving, but its far from good for the engine to do that every time you accelerate.

I know its an Auto but driving our TR magna, while EFI, I very rarely see it over 3500RPM, and its plenty quick enough to zip around town and get up to speed quick enough on the freeway. It hit 5800RPM flat out acceleration the other week and coped fine, but its not something I'd make a point of doing lol

:naughty:


Not all day every day, i wouldn't expect the magna to hold up to being thrashed ALL the time without some serious strengthening of the engine internals.

My 2.6L (manual) TR does get thrashed sometimes, not in such a bad way though. A mate of mine from tafe had a VN calais (on gas and petrol) and he thrashed the f**k out of it ALL THE TIME, one of those guys who has to try to go sideways around every corner and race every other car lol

It suprised me how well it took all the abuse and crashing into gutters :D , i'm sure he would have killed it by now though.

He also made a hideous, lumpy fibreglass parcel shelf for it, which weighed a lot more without speakers than the old one did with speakers.


Sorry for rambling, ill go away now :gtfo:

Not all day every day, i wouldn't expect the magna to hold up to being thrashed ALL the time without some serious strengthening of the engine internals.

My 2.6L (manual) TR does get thrashed sometimes, not in such a bad way though. A mate of mine from tafe had a VN calais (on gas and petrol) and he thrashed the f**k out of it ALL THE TIME, one of those guys who has to try to go sideways around every corner and race every other car lol

It suprised me how well it took all the abuse and crashing into gutters :D , i'm sure he would have killed it by now though.

He also made a hideous, lumpy fibreglass parcel shelf for it, which weighed a lot more without speakers than the old one did with speakers.


Sorry for rambling, ill go away now :gtfo:

If i had a VN I'd be running the POS into the ground too.
Mate of mine does that with his VN, Result = 2 blown motors

']If i had a VN I'd be running the POS into the ground too.
Mate of mine does that with his VN, Result = 2 blown motors
Thats standard issue isn't it? Regardless of how its driven? Rebuild every 3 years? At least he can get a replacement from a VY.