I've noticed that my Q is really sluggish from a dead stop. In fact if I stomp it to the floor it's actually more sluggish than if I ease into the pedal. I've never been able to even chirp the tires, even trying hard.
Now from 30-40 mph it seems to move right on. In fact, I haven't even floored it from 30mph I'm so pleased the accerlation I get from just pushing the pedal a little. (I might floor it tonight on the way home from 30.)
My question to the group is whether this is normal due to the weight of the car or if I have a problem. With normal driving it's fine, but if I try to hot rod it a little I'm disappointed.
BTW, It's stock.
Sluggish Q - Is it Normal?
-
AlabamaDan
- Posts: 1750
- Joined: Fri Aug 02, 2002 12:37 pm
- Car: 2015 Infiniti Q70
1998 Infiniti QX4
Danny,
It's relatively normal, espically in a 94..
You have granny gears!! No offense, so do I
In AZ if you run the AC, it's really slow.. The Q doesn't really do anything until 4,000 RPMS...
I wish we had a ZF 6 speed transmission and a higher diff.. The JAG XJ8 I drove had both of these. Same amount of power as the Q, but the thing took off like a rocket from the line..
A 4.08 will greatly help things out. As will a level ten transmission/torque convertor.. You should be able to knock 1+ sec off your 0-60 with those mods..
If you don't want to modify, you're kind of stuck.. Some further maintenance may yield some improvement, but generally the Q is a dog of the line
It's relatively normal, espically in a 94..
You have granny gears!! No offense, so do I
In AZ if you run the AC, it's really slow.. The Q doesn't really do anything until 4,000 RPMS...
I wish we had a ZF 6 speed transmission and a higher diff.. The JAG XJ8 I drove had both of these. Same amount of power as the Q, but the thing took off like a rocket from the line..
A 4.08 will greatly help things out. As will a level ten transmission/torque convertor.. You should be able to knock 1+ sec off your 0-60 with those mods..
If you don't want to modify, you're kind of stuck.. Some further maintenance may yield some improvement, but generally the Q is a dog of the line
Re: Sluggish Q - Is it Normal?
dannymchale wrote:I've noticed that my Q is really sluggish from a dead stop. In fact if I stomp it to the floor it's actually more sluggish than if I ease into the pedal. I've never been able to even chirp the tires, even trying hard.
It might be the TCS. Traction control system. When it's on, you will loose power. It's been a while since I've slamed the pedal without the TCS, but I'm sure you'll burn some rubber like that.
-
natsoundup
- Posts: 669
- Joined: Fri Jul 26, 2002 4:27 am
My 94 seems slow off the line in comparison to the 90... the 90 can really scoot.
However those on the board say there shouldn't be that much difference between the two.
I drove the 90 the other day for the first time in awhile...(my son has it now) and it is really a different car than the 94.
I love them both for what they are....kind of like your kids....
However those on the board say there shouldn't be that much difference between the two.
I drove the 90 the other day for the first time in awhile...(my son has it now) and it is really a different car than the 94.
I love them both for what they are....kind of like your kids....
Any member who says there isn't a significant difference between a 90 and a 94 is wrong, sorry..
The 90 had stronger engine, better optimized gearing, slighty less weight.. better aerodynamics.. The 90 was built for performance, the 94 was built for luxury, with performance ranking 2nd in priority.
Some say .5 may not be much, but in terms of feel and car lengths it is..
Even the 90 is lacking off the line.. A 90 with 4.08 is what you want, for good off the line performance.
The 90 had stronger engine, better optimized gearing, slighty less weight.. better aerodynamics.. The 90 was built for performance, the 94 was built for luxury, with performance ranking 2nd in priority.
Some say .5 may not be much, but in terms of feel and car lengths it is..
Even the 90 is lacking off the line.. A 90 with 4.08 is what you want, for good off the line performance.
My 96Q spun its tires with a car full of people and the a/c on. I won a bet that it would (Toyo Proxes/ 225-60-15's). By myself it would leave two black strips about 5' long. I've switched to Fulda tires also 225-60-15's, but these tires are taller and wider with much stiffer sidewalls. It changed the handling characteristics. The car still will spin the tires, but not as much as the Toyo's and it feels like I upgraded my shocks.....Tires make a big difference.
-
Q45tech
- Moderator
- Posts: 14296
- Joined: Tue Apr 30, 2002 3:19 am
- Car: 1990 Q45 342,400 miles 22 years ownership with original engine
1995 G20t 5 speed 334,000 miles 16" 2002 wheels - 205/50/16 Sr20ve vvl
Hard compound tires will spin like crazy, soft compound will just hook up.Remember even the 94-96 came with custom [Dunlop D80V4 reinforced] 200 treadwear tires that were a very optimistic 200 more like 160.
The 90-93 were even stickier.Spinning tires is wasteful and increases the zero to 60 time.
A stopwatch is you friend.
The 90-93 were even stickier.Spinning tires is wasteful and increases the zero to 60 time.
A stopwatch is you friend.
My 92Q can chirp quite loud from a dead stop. In fact the Q chirps sometimes when I don't want it to. And I apollogizing silently to the guy behind me if there is loose gravel that winds up in his grill! So it seems the first gens tends to have a little more power from the start.
It still seems to me you should get a better response from your 94. Have you changed the fuel filter lately, Checked the fuel pump or cleaned the injectors? A can a BG44k can make a big difference in performance. $17.00 bucks from Joe.
red
It still seems to me you should get a better response from your 94. Have you changed the fuel filter lately, Checked the fuel pump or cleaned the injectors? A can a BG44k can make a big difference in performance. $17.00 bucks from Joe.
red
-
greg_atlanta
- Posts: 1111
- Joined: Tue Jul 23, 2002 4:37 pm
- Car: 2008 G35 Journey Sedan, silver/black (no sunroof), 1992 Q45 (in a past life)
-
Q45tech
- Moderator
- Posts: 14296
- Joined: Tue Apr 30, 2002 3:19 am
- Car: 1990 Q45 342,400 miles 22 years ownership with original engine
1995 G20t 5 speed 334,000 miles 16" 2002 wheels - 205/50/16 Sr20ve vvl
You multiply rear wheel torque by 9.85 [9.26 on 94-96] [9.66 on 97-01] then divide by 2. Then correct by [24/25.1=0.956] for tire diameter to arrive at the individual tire torque on launch or at any rpm.
[241 x 9.85]/2 *0.956= ~~ 1135 lb/ft at 4,000 rpm
Roughly 950 pounds of weigh on each rear tire static under acceleration it shifts to maybe 1200 pounds...........most ultra performance tires and roads can achieve 1 G [1200 pounds] so the tires should spin a little at 4,000 rpm on a 90Q.
Unfortunately as we know the engine doesn't create much torque at under 3,000 rpm............when the tires are cold [even 90F] the traction is much lower thus the initial spin.
The total 2270 lb/ft can only accelerate the 4300 pound Q by:2270/4300=0.5279G at 4,000 rpm by 6,000 rpm this declines to 0.428G and 0.34G by 6,700 rpm.
But 2nd gear acceleration never exceeds 0.30 G
The above simple method disregards the effects of air resistance.
A car like the newer LS430 has a 13.5 1st gear x diff multiplier so assuming equal engine torque [300 lb/ft flywheel] and equal diameter tires and equal drive line losses: 13.5/9.85=1.37 so the acceleration peak in 1st gear would be 0.5279 x 1.37=...........0.7235G.......the LS has an open diff so without traction control it would burn the tires off [only one tire] at 22 mph peak acceleration speed vs the Q 30 mph [maybe a spin or two.
[241 x 9.85]/2 *0.956= ~~ 1135 lb/ft at 4,000 rpm
Roughly 950 pounds of weigh on each rear tire static under acceleration it shifts to maybe 1200 pounds...........most ultra performance tires and roads can achieve 1 G [1200 pounds] so the tires should spin a little at 4,000 rpm on a 90Q.
Unfortunately as we know the engine doesn't create much torque at under 3,000 rpm............when the tires are cold [even 90F] the traction is much lower thus the initial spin.
The total 2270 lb/ft can only accelerate the 4300 pound Q by:2270/4300=0.5279G at 4,000 rpm by 6,000 rpm this declines to 0.428G and 0.34G by 6,700 rpm.
But 2nd gear acceleration never exceeds 0.30 G
The above simple method disregards the effects of air resistance.
A car like the newer LS430 has a 13.5 1st gear x diff multiplier so assuming equal engine torque [300 lb/ft flywheel] and equal diameter tires and equal drive line losses: 13.5/9.85=1.37 so the acceleration peak in 1st gear would be 0.5279 x 1.37=...........0.7235G.......the LS has an open diff so without traction control it would burn the tires off [only one tire] at 22 mph peak acceleration speed vs the Q 30 mph [maybe a spin or two.
-
AlabamaDan
- Posts: 1750
- Joined: Fri Aug 02, 2002 12:37 pm
- Car: 2015 Infiniti Q70
1998 Infiniti QX4
Hey everyone.
I'm gonna try some fuel injector cleaner and see how that works. I'm probably going to carry it to T3 for the 120k service soon. Between the two of those, it should help.
I drove it several hundred miles this weekend and noticed a few things. I think someone mentioned that it didn't really get powerful until 4000 RPM. I agree. No matter how fast I was going if I pushed it I could "feel" it really pull at 4000+ RPM.
I did some WOT driving a little as I was on the interstate and it was rather deserted. I had to let off it, it never let up. As the MPH moved into triple digits I lost my nerve and backed off. (That'd really such to wreck such a beautiful machine.) I consitently drove it around 80-90 with the cruise on and it just moves beautifully. It's really a driver's car.
Dennis, if you're out there, I know that spinning the tires really isn't effective. I was just giving that information to let yall know how weak it is on the line.
I'm gonna try some fuel injector cleaner and see how that works. I'm probably going to carry it to T3 for the 120k service soon. Between the two of those, it should help.
I drove it several hundred miles this weekend and noticed a few things. I think someone mentioned that it didn't really get powerful until 4000 RPM. I agree. No matter how fast I was going if I pushed it I could "feel" it really pull at 4000+ RPM.
I did some WOT driving a little as I was on the interstate and it was rather deserted. I had to let off it, it never let up. As the MPH moved into triple digits I lost my nerve and backed off. (That'd really such to wreck such a beautiful machine.) I consitently drove it around 80-90 with the cruise on and it just moves beautifully. It's really a driver's car.
Dennis, if you're out there, I know that spinning the tires really isn't effective. I was just giving that information to let yall know how weak it is on the line.