| Author | Topic |
|---|
Location:
Perth WA
Registered:
June 2003
|
 4AC Rpm Questions..
|
Thu, 14 August 2003 10:57
|
 |
2nd gear @ 85km/h roughly how much rpm ? 6k plus ?
no i wasnt driving ! (getting in first  )
|
|
|
Location:
Sydney, OZ
Registered:
May 2002
|
|
Re: 4AC Rpm Questions..
|
Fri, 15 August 2003 04:48
|
|
|
We tried to destroy one of these, and I think we got it to 90Kph and it was reving well over 6k !! Yes it didn't last much longer either....
|
|
|
Location:
NSW - Sydney
Registered:
August 2003
|
|
Re: 4AC Rpm Questions..
|
Fri, 15 August 2003 04:51
|
|
i never really pushed mine that far, but i usually get 110km at 4-5k on 3rd when i feel like pushing it.
|
|
|
Location:
Adelaide
Registered:
May 2002
|
|
Re: 4AC Rpm Questions..
|
Fri, 15 August 2003 05:21
|
|
While i gan get mine to 5k comfortably, it really doesnt make any usable power past 4 or 4200.
Never baan game to pusi it past 5 in 2nd which is about 60kph acording to my speedo.
Craig.
|
|
|
I supported Toymods
Location:
Sutho/Hills NSW
Registered:
September 2002
|
|
Re: 4AC Rpm Questions..
|
Fri, 15 August 2003 09:07
|
|
I clocked 40kph at 3100-3200rpm today in a 4AFC. Assuming you are in a manual, your clutch isn't slipping, you have similar gearing to mine nad the same wheel rolling diameter, 85km comes out at around 6600 to 6,800rpm by my elementary maths. 
|
|
|
Location:
Adelaide
Registered:
May 2002
|
|
Re: 4AC Rpm Questions..
|
Fri, 15 August 2003 09:54
|
|
I once hit about 7600rpm in my smokey 4AC POS. I was overtaking on a LONG open road (it needs it), with the music cranked and not really concentrating. Then when i got out in front and backed off, I looked and the needle was on its way back past 7500rpm...
Its survived to this day though, tough bastards them 4ACs
|
|
|
Toymods Social Secretary
Location:
Sydney
Registered:
July 2002
|
|
Re: 4AC Rpm Questions..
|
Fri, 15 August 2003 10:13
|
|
|
hmmm... as tough as they may be, i still have one here that died rather dramatically! God knows how though?
|
|
|
Location:
Perth WA
Registered:
June 2003
|
|
Re: 4AC Rpm Questions..
|
Fri, 15 August 2003 11:21
|
|
| EvilJack wrote on Fri, 15 August 2003 17:07 |
I clocked 40kph at 3100-3200rpm today in a 4AFC. Assuming you are in a manual, your clutch isn't slipping, you have similar gearing to mine nad the same wheel rolling diameter, 85km comes out at around 6600 to 6,800rpm by my elementary maths.
|
Clutch slips just a wisker noticable in 5th at 80km when u plant the foot 
It is a 5sp manual..
When do these beasts redline ? 5,500rpm ?
|
|
|
I supported Toymods
Location:
melbourne
Registered:
June 2002
|
|
Re: 4AC Rpm Questions..
|
Fri, 15 August 2003 12:33
|
|
|
dunno, but i know that 100km/h corresponds to 7000 rpm, in mine at least. i'll get it to do 8 the day before i put in a 4AGE
|
|
|
Location:
Melbourne
Registered:
May 2002
|
|
Re: 4AC Rpm Questions..
|
Fri, 15 August 2003 13:28
|
|
105km/h 2nd gear, 4afc, 3spd Auto.
I thought it was going to drop out under the car 
|
|
|
Location:
NSW, East Coast
Registered:
July 2003
|
|
Re: 4AC Rpm Questions..
|
Fri, 15 August 2003 13:46
|
|
95km 2nd gear 4ac, didnt have much left either, rpm was way up around 6500
110kms 2nd gear 4age, didnt have much left, rpm was way up there around 7700.
I prefer the second scenario myself.
Anybody else, please do tell
|
|
|
Location:
Rosanna, Melb
Registered:
June 2002
|
|
Re: 4AC Rpm Questions..
|
Fri, 15 August 2003 14:02
|
|
Stock Sprinter will make it to 100 in 2nd. Since I had a swap planned I didn't care about the 4AC and it saw plenty of 7k+. And 8k once or twice. Didn't have any power at all up there, but it didn't die on me either.
Hen
|
|
|
Location:
Newcastle
Registered:
September 2002
|
|
Re: 4AC Rpm Questions..
|
Sat, 16 August 2003 04:06
|
|
| THE WITZL wrote on Fri, 15 August 2003 20:13 |
hmmm... as tough as they may be, i still have one here that died rather dramatically! God knows how though?
|
that motor had seen 8000rpm  and been to 7k plently of times.
BTW what is broken in the bottom end??
|
|
|
Toymods Social Secretary
Location:
Sydney
Registered:
July 2002
|
|
Re: 4AC Rpm Questions..
|
Sat, 16 August 2003 08:24
|
|
|
hasnt been cracked yet. have more important 4A motors to attend to
|
|
|
Location:
Central Coast
Registered:
November 2002
|
|
4ac max speed
|
Sat, 16 August 2003 22:36
|
|
A mate and i have got a 4ac to 160km/h a couple of times no problems. 127 000kms on the clock. 5spd.
It seemed to go allright from 120km/h - 160km/h.
We stopped at 160 because it got a bit too hairy at nite.
|
|
|
I supported Toymods
Location:
melbourne
Registered:
June 2002
|
|
Re: 4ac max speed
|
Sun, 17 August 2003 05:23
|
|
|
bleh, mine got to 165, with 240,000 ks on it. i think that was the absolute upper limit of the engine though.
|
|
|
I supported Toymods
Location:
Epping, Sydney
Registered:
May 2002
|
|
Re: 4AC Rpm Questions..
|
Sun, 17 August 2003 05:36
|
|
|
I wouldn't want to take one any faster than 120, unless I had a full roll cage and race suit
|
|
|
Location:
Adelaide
Registered:
May 2002
|
|
Re: 4AC Rpm Questions..
|
Sun, 17 August 2003 12:07
|
|
Got mine to 165, but backed off cause it was getting wayyyyy light on the suspension! That and the fact it really didnt have too much to go.
A cage, helmet, harnesses and good seats are always a plus 
Craig.
|
|
|
Location:
Adelaide
Registered:
May 2002
|
|
Re: 4AC Rpm Questions..
|
Sun, 17 August 2003 12:10
|
|
| FLY PSI wrote on Sat, 16 August 2003 13:36 |
| THE WITZL wrote on Fri, 15 August 2003 20:13 |
hmmm... as tough as they may be, i still have one here that died rather dramatically! God knows how though?
|
that motor had seen 8000rpm and been to 7k plently of times.
BTW what is broken in the bottom end??
|
My first 4A-c used all its oil and trashed the crank bearing on no.2 cylinder. Still dunno what happened to all the oil tho! filler her up and no leaks.... very odd.
Still, replacement sprinter 4A-C for $50. Bargin!
Craig.
|
|
|
Location:
Albany WA
Registered:
October 2003
|
|
Re: 4AC Rpm Questions..
|
Tue, 25 November 2003 15:35
|
|
|
175KMs/hr. 310,000KMs on clock. Blown head gasket. Downhill, then flatlanding. Redline is meant to be 6000RPM. Will find limits of engine in 2 months or so.
|
|
|
Location:
Gawler, SA
Registered:
August 2003
|
|
Re: 4AC Rpm Questions..
|
Wed, 26 November 2003 00:11
|
|
When overtaking it sees plenty of 5k and seems to be ok with that. Went through to Tunanda the other day in the Barossa Valley and the roads are 100km/hr but there are so many 45km/hr corners with plenty of hills. Since this thing has no power had to keep it in 4th doing 100km/hr and the 4a-c had to sit on 4k rpm for around 45mins up and then again on the way back.
When driving around on those revs the car sounds powerful
|
|
|
Location:
NSW
Registered:
September 2003
|
|
Re: 4AC Rpm Questions..
|
Wed, 26 November 2003 00:20
|
|
| Mazda626 wrote on Thu, 14 August 2003 20:57 |
2nd gear @ 85km/h roughly how much rpm ?
|
All of them!!!!
|
|
|
Location:
Melbourne
Registered:
September 2002
|
|
Re: 4AC Rpm Questions..
|
Wed, 26 November 2003 02:50
|
|
I never really got my 4AC over 6k, it liked to hover around there most of the time... I did at once stage give it hell al the way to 6k for a couple of days and then managed to put a con-rod bolt through the sump ;p Therre was oil from one end of town to the other.... Quite funny really...
I did try to kill the motor before the 4age, didnt work! Ill drain the oil and water next time I get one to kill
|
|
|
Location:
Melbourne
Registered:
October 2003
|
|
Re: 4AC Rpm Questions..
|
Wed, 26 November 2003 13:15
|
|
I've done 160km/hr in a CS ae92 sedan, scary AS...
I'd never do that again in that car, stock as a rock....
I could have gone 170ish if i tried it again, i just needed more space, the road wasn't very big!!
|
|
|
Location:
Western Sydney (NSW)
Registered:
March 2003
|
|
Re: 4ac max speed
|
Thu, 27 November 2003 22:58
|
|
| Kin9os wrote on Sun, 17 August 2003 08:36 |
A mate and i have got a 4ac to 160km/h a couple of times no problems. 127 000kms on the clock. 5spd.
It seemed to go allright from 120km/h - 160km/h.
We stopped at 160 because it got a bit too hairy at nite.
|
In my AE82 sedan with 2in cat back & shity mags with 10% tread.... I clocked 145kph... Then I got a small oil leak then everything went dry.... After rebuild 3000k`s afer I got up 2 180kph... Jesus christ I`ll never do that again... Mr Rolla is a boat.....
|
|
|
