Is YOUR tach accurate?
Thread Starter
Burning Brakes
Joined: Oct 2002
Posts: 835
Likes: 3
From: Water Winter Wonderland
Is YOUR tach accurate (VOTE HERE)
Lets see who's got a decent tach, and who doesn't. You know, misery loves company!
For this poll, please consider both static and dynamic (rapidly accelerating) readings.
[Modified by ELEVENS, 8:32 PM 11/28/2002]
For this poll, please consider both static and dynamic (rapidly accelerating) readings.
[Modified by ELEVENS, 8:32 PM 11/28/2002]
Thread Starter
Burning Brakes
Joined: Oct 2002
Posts: 835
Likes: 3
From: Water Winter Wonderland
Re: Is YOUR tach accurate? (NoWorries)
Dead on. :cool:
Cheater! ;) (But which one - both??!) Guys I know with the digital dash complain that they're slow to respond, like when going through the gears WOT.
[Modified by ELEVENS, 5:19 PM 11/28/2002]
Race Director
Joined: Oct 2000
Posts: 16,477
Likes: 1
From: Enter Post Count Here
Re: Is YOUR tach accurate? (ELEVENS)
The AutoMeter is perfect, the stock one is SOOOOOOO slow that I don't even look at it when WOT.
I don't have a decent trans governor, so I have to shift the car myself, I've been shifting about 5250 rpm, thats where the car feels like its getting slower. I'd never be able to nail that number with the stock tach, which skips 2-300 revs per refresh...
My stock tach is accurate if I'm not accelerating, within 100 revs or so. :seeya
[Modified by NoWorries, 4:13 PM 11/28/2002]
I don't have a decent trans governor, so I have to shift the car myself, I've been shifting about 5250 rpm, thats where the car feels like its getting slower. I'd never be able to nail that number with the stock tach, which skips 2-300 revs per refresh...
My stock tach is accurate if I'm not accelerating, within 100 revs or so. :seeya
[Modified by NoWorries, 4:13 PM 11/28/2002]
Elite Torch Red Member
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From: Exit 89 GSP,Lakewood,NJ The Land Of Mojo
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Re: Is YOUR tach accurate? (NoWorries)
Burning Brakes
Joined: Jan 2001
Posts: 1,169
Likes: 0
From: Manhattan
Re: Is YOUR tach accurate? (ELEVENS)
:nonod:
I can't vote, though. My tach is now reading ~2000rpm high :mad
ELEVENS, can you tell me a little bit about your wheels? (size, backspacing, etc) They are very :cool:
:cheers:
Edit: I found the choice for >1000 :crazy: Must of been all that bird that made me overlook it :lol:
[Modified by Raistlin, 6:08 PM 11/28/2002]
I can't vote, though. My tach is now reading ~2000rpm high :mad
ELEVENS, can you tell me a little bit about your wheels? (size, backspacing, etc) They are very :cool:
:cheers:
Edit: I found the choice for >1000 :crazy: Must of been all that bird that made me overlook it :lol:
[Modified by Raistlin, 6:08 PM 11/28/2002]
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Thread Starter
Burning Brakes
Joined: Oct 2002
Posts: 835
Likes: 3
From: Water Winter Wonderland
Re: Is YOUR tach accurate? (Mr Mojo)
Hey Mr Mojo!
THAT'S THE COOLEST VIDEO, MAN!!!!
Im not big on the animated icons, but THIS time...
:cheers: :cheers: :cheers: :cheers: :cheers: :cheers:
THAT'S THE COOLEST VIDEO, MAN!!!!
Im not big on the animated icons, but THIS time...
:cheers: :cheers: :cheers: :cheers: :cheers: :cheers:
Team Owner
Joined: Nov 1999
Posts: 32,782
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From: Former NCM Drag Racing coordinator, National director Corvette Challenge Spring Hill, Tennessee: Whiting, New Jersey
Cruise-In VI Veteran
Cruise-In VII Veteran
Re: Is YOUR tach accurate? (95AquaC4)
Dyno showed me being off 700 rpm!! :eek:
:yesnod:
Thread Starter
Burning Brakes
Joined: Oct 2002
Posts: 835
Likes: 3
From: Water Winter Wonderland
Re: Is YOUR tach accurate? (Raistlin)
...tell me a little bit about your wheels? (size, backspacing, etc)
[Modified by ELEVENS, 7:24 PM 11/28/2002]
Team Owner
Joined: Mar 2000
Posts: 83,383
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From: Boston, MA
First gear is ludicrous.
Second gear is about an 800 RPM joke.
Third gear and higher is on.
At the track if the tires spin my MSD limiter (6300 RPM) is kicking in with the tarck still showing between 4200-4300.
Second gear is about an 800 RPM joke.
Third gear and higher is on.
At the track if the tires spin my MSD limiter (6300 RPM) is kicking in with the tarck still showing between 4200-4300.
Burning Brakes
Joined: Jan 2001
Posts: 1,169
Likes: 0
From: Manhattan
Re: Is YOUR tach accurate? (ELEVENS)
...tell me a little bit about your wheels? (size, backspacing, etc)
They're custom 3-piece FIKSE FM5's. 17x11 in the rear, 17x9.5 in the front. They were custom-backspaced to fit perfectly under the fenders (sorry-don't remember the specs). Before these, I owned silver-painted GS wheels which stuck out about 1/2" in the rear on each side :( Last week I wanted to get the centers anodyzed black, but Fikse wants $375 per wheel to anodyze (actually replace) the centers. OUCH! Not gonna happen! :cry
[Modified by ELEVENS, 7:24 PM 11/28/2002]
They're custom 3-piece FIKSE FM5's. 17x11 in the rear, 17x9.5 in the front. They were custom-backspaced to fit perfectly under the fenders (sorry-don't remember the specs). Before these, I owned silver-painted GS wheels which stuck out about 1/2" in the rear on each side :( Last week I wanted to get the centers anodyzed black, but Fikse wants $375 per wheel to anodyze (actually replace) the centers. OUCH! Not gonna happen! :cry
[Modified by ELEVENS, 7:24 PM 11/28/2002]
What got my attention was the fact the rears didn't stick out, and the center section has an aggresive, recessed look.
Le Mans Master
Joined: Jul 1999
Posts: 7,072
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From: Maryland
Re: Is YOUR tach accurate? (Raistlin)
:confused: How do I tell? For a stock 87 L98 with 700 R4, what RPM should I be at for what speed? I haven't dyno'd my car or anything like that to get a calibrated comparison. Is there another way to figure out what RPM it's really running? ~Juliet
Team Owner
Joined: Mar 2000
Posts: 83,383
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From: Boston, MA
The problem with the digidash is that it only updates something like 12 times a second. Add on top of that that the liquid crystals cannot react that fast and you get interesting results in low gears.
Race Director
Joined: Oct 2002
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From: RI
Re: Is YOUR tach accurate? (Mr Mojo)
Notice your oil pressure is kind of low under heavy accelaration. Maxing at 40 PSI at 5800 RPM's??? Shouldn't it be at 50 to 60 even under hot conditions?? I know mine is that's why I ask......??.... :confused:
Thread Starter
Burning Brakes
Joined: Oct 2002
Posts: 835
Likes: 3
From: Water Winter Wonderland
Re: Is YOUR tach accurate? (Juliet)
Hi Juliet,
I think most compare the reading with a scanner tool or shift light. If you know your rear-gear ratio and tire size, the rpm can be calculated based upon speed, transmission gear, and a locked up torque converter, assuming your speedo is correct (here we go again!).
Cheers!
I think most compare the reading with a scanner tool or shift light. If you know your rear-gear ratio and tire size, the rpm can be calculated based upon speed, transmission gear, and a locked up torque converter, assuming your speedo is correct (here we go again!).
Cheers!
Thread Starter
Burning Brakes
Joined: Oct 2002
Posts: 835
Likes: 3
From: Water Winter Wonderland
Re: Is YOUR tach accurate? (kittmaster)
Notice your oil pressure is kind of low under heavy accelaration
...and speedo, and oil temp, and battery, and.........!!!!