Greg Kuhlmann

I think i had my car at it's MAX yesterday but i dont know how fast i was going since the speedO only goes to 85...

LG4, 700r4, 2.73's, 16"GTA wheels...
i was in overdrive at 4000 to 4100 RPM's... anyone have a clue???

I call that just flat gettin' it...

BMmonteSS

http://www.f-body.org/gears/
check out that link, but i seriously doubt that you were in OD. 700-R4's won't stay in OD at full throttle unless you have put in the special valve that will let you do that. Also you have to acount for converter slipagebout 3 or 4 hundred rpm's. Going by the gear calculater above with you in 3rd you were doin between 110 and 115. If you were in OD you would have been doin close to 160 which i doubt a lg4 will do unless you drop it off a cliff, which i tried once on the biggest hill i could find it was a 9% grade for 2 miles, i mustered 138 in my l69 monte.

Mark A Shields

Exactly about the OD at WOT.

According to my calculations with a 26" tall tire, you were doing 166mph. Which I guarantee you weren't doing.

zippy

you had the shifter in od, but was the trans in fourth. as pointed out, not all 700r4's will shift 4th at wot.

Greg Kuhlmann

yep OD in 4th at 4000 to 4100 RPMS... The speedo was way below the 85... closer to 0 then 85.... i dont think it was moving much more....

Chronos_Titan

I have had mine up to 125. Bad idea with a really ****ed up front end.

bradkeith

Greg, did your needle go over the 0? I've had my 86 camaro wrap the needle around to the 30. Of course i was turning 5900 though. And i had the corvette servo installed also. But this was my v6

Greg Kuhlmann

No... it was turning back around 0.... i didnt really wanna redline it... i was just wondering if anyone knew how fast or at least about how fast i was going....

BMmonteSS

vett servo just helps your 1-2 shift, in order to catch OD at full throttle you need the "high speed cruise" valve, it lets you cruise in OD at 3/4 throttle and will let you catch OD at full throttle. You probly knew that already but i thought i would clarify for anyone who didn't

Greg Kuhlmann

Hearing that about the 700r4 not shifting into 4th on WOT in OD... makes me think maybe mine has been rebuilt... i bought the car with 120,000 miles on it... now it has close to 130...

It shift good and solid everytime.... i know i was in 4th... atleast im pretty sure.... i gased on it doing about 70mph... I know it has down shifted to second before... i didnt think it did that time... then it hit another gear and i was all eyes on the road... seen the tach getting close to 4500 rpms... so i let off it... that and the power poles looked like a fence... i was going...


how far can 3rd gear go then.... will about 100 or so???

cfabe

Greg, I'm gonna have to agree with the other guys that you were in 3rd. That would put your speed at right about 106 mph, assuming 245 50 R15 tires and 3800 rpm after the converter slippage. If you were truly in 4th you'd have been doing 151 mph, and theres no way a stock lg4 could do that. 150+ is really really moving and it takes ALOT of hp to move that fast. More like 300-350 versus the 150 or so the lg4 has. Aerodynamic drage is a square function, which means that to go twice as fast you need 4 times as much power. Keep in mind that its a well known fact that the 700r4 will not hold 4th to full throttle except in some special instances (b4c for example). Also, the stock speedo cant be relied on to be accurate enough at those speeds to extrapolate the scale and get a speed reading.

BMmonteSS

3rd gear will go to 140 at 5000 rpm's. Go check out that link i posted earlyer and see for your self. IT is really usefull for firguring out things like that. I think once you see what your car's gearing does you'll see there was no way you were in OD.

Mark A Shields

There is a calculator on this site's homepage.

But a stock LG4 will not do 160, that's all there is to it.

Greg Kuhlmann

Hey Mark.... you the one that "calculated 166" another guy may have said 160.... did i ever say anything about doing 160??? Nope dont think so... i just asked if some would know about how fast i was going in 4th gear in OD with the tach at 4000 to 4100 Rpms... and then if it wasnt 4th gear then how far will 3rd gear go? well over the 100MPH mark????

Mark A Shields

No, you didn't say you were doing 160, but according to your tach and the gear YOU say you were in you were doing 166mph. So chill, k. Just going by the numbers you gave me. So I doubt you were in OD.

Greg Kuhlmann

im 110% sure i was in OD... i never get on the highway in drive...

so was it all 3rd gear taking me into the hundreds???

BMmonteSS

I don't mean to flame here but if you just go to the link i posted at the top and enter your specs it would spit out the mph you were goin. Since you didn't i took the time to do it for you and post it here for you to see. As you'll see in the table below, if you were in deed in OD you would have been doing 161 mph which is insane for a stock LS-1. In 3rd you would be doin 115 which is haulin for a lg-4.
RPM 3rd 4th
500 14 20
600 17 24
700 20 28
800 22 32
900 25 36
1000 28 40
1100 31 44
1200 34 48
1300 36 52
1400 39 56
1500 42 60
1600 45 64
1700 48 68
1800 50 72
1900 53 76
2000 56 80
2100 59 84
2200 61 88
2300 64 92
2400 67 96
2500 70 100
2600 73 104
2700 75 108
2800 78 112
2900 81 116
3000 84 120
3100 87 124
3200 89 128
3300 92 132
3400 95 136
3500 98 140
3600 101 144
3700 103 148
3800 106 152
3900 109 156
4000 112 160
4100 115 164
4200 117 168
4300 120 172
4400 123 176
4500 126 180
4600 129 184
4700 131 188
4800 134 192
4900 137 196
5000 140 200
5100 143 204
5200 145 208
5300 148 212
5400 151 216
5500 154 220
5600 157 224
5700 159 228
5800 162 232
5900 165 236
6000 168 240

Omega

iTrader: (1)

They are not doubting that you were in OD... as far the the shifter was telling you. What they are saying is that you need a modified valve in the trans to be in OD at anything over 1/2 throttle. So, your shifter was in OD, but the trans was actually in 3rd.

I had an LG4 5spd, after a LONG straight and a slight decline I finally hit 131. It just didn't have the power to anything more than that... hense everyone saying you couldn't have been doing ~160.

Make no mistake, you were cooking, but you certainly weren't doing 160

Greg Kuhlmann

LMAO... Im not claming i was doing 160!!!

I'm just asking how fast i was going.... Maybe it was third gear... i know i was in Over Drive b/c when i threw it up to N to slow down i only had to push it up once... (beings if i were in Drive i would have had to push it up twice!!!!)

IM not claiming i was going 160....

and then again the car had 120 thousand miles on it when i bought it... it now has 129,XXX and i think maybe the tranny was rebuilt... just b/c i can have it floored and it shifts good a firm and has never had a slip or a weird noise nothing... with over 120 thousand miles and 15 years old its either rebuilt or holding up good...

But by looking at my speedO it goes to 85... i had it well over the 85 mark... just by thinking every ten MPH is about a thumb nail i had a few thumbs after the 85... atleast 130....


one last time.... "I'm not claiming i had a stock lg4 going 160 mph"

RedIrocZ-28

Greg what about this don't YOU understand? The fact that your SHIFTER was in OD is inconsequential. When your car is in OD and you are at a stoplight and you take off on the green light... those RPM drops are what? Those are called shifting between gears. But your Transmission gear selector lever is in OD....so that means you are in OD right?

THE POINT IS, your gear shifter was IN OVERDRIVE, but that is inconsequential because you were NOT IN OVERDRIVE. You were IN DRIVE (3rd gear) although your GEAR SHIFTER said OVERDRIVE(4th gear). If you want to get really technical you have a total of 5 shifts... thats right 5. The TC locking up feels like another shift. It only drops a couple hundred RPM. Sooo..... You do understand that you were IN FACT in DRIVE though your gear shifter read OVERDRIVE right? 130mph seems more likely than the 160 you WOULD HAVE BEEN GOING if you were in fact IN OVERDRIVE. No one said you claimed that you were doing 160. They said that YOU SAID you were in OD at 4100 and that would have been 160mph which is not possible considering your hp rating. Capice?

:rockon:

TBI305Camaro

if im trying to find out how fast im going in my lo3 i never put it in OD i just leave it in D because it will downshift itself anyways...thereis a valve you can get that might help but lg4s and lo3s dont have the power to turn 160 i do feel i could hit 140 if i didnt have the speed limiter...im not sure if mine works or not because it goes right past 115 on my speedo and begs to the trip meter....

Bluebird

[QUOTE]Originally posted by RedIrocZ-28
[When your car is in OD and you are at a stoplight and you take off on the green light... those RPM drops are what..



:sillylol: :sillylol: :sillylol:

seems everyone is getting frustrated here.. lol.. hey
it's ok dude.. we understand that you were just asking
about how fast your car was going.. noone is mad here.. just
a little frustration because we can see now that what we are talkin about here, and what you are picking up from the responses here are mis-conscrued....

We believe you that you had your car in the OD position.
However, as RedIrocZ-28 had stated, when you take off
from a stop sign, you are in the Overdrive position also.
BUT the transmission actually is in different gears.
so what these people are saying to you.. is according to
where your speedometer was at, the rpms you were running
and the horsepower you have, your aproximate speed would
have to be somewhere between 115mph-130 which means the transmission itself was in 3rd gear.
I know it doesn't sound logical.. you are thinking that if you
had it completly floored that you should be in the highest gear right?? but as they stated.. the 700r4 would not stay in that gear with the rpm's where you said they were. UNLESS you were going 160 mph, and believe me.. if you were going 160 with an LG-4.. then something is wrong.,.

titeride85

Yes, you can do 100+ in third gear at 4100 with a 305. I had an s-10 with a 4.3 v6 and wound it to 4500 in 2nd and was doing 73 according to the digital speedo. I also know circle track racers that run slightly modified 350's in second (because of a short track) and they are pulling over 90 mph in the straights. So, yes. Your 3rd gear at 4100 will top 100. And i hate to say it but you, EXTREMLY LIKELY, were in 3rd. Probally around 105-110.

Matt87GTA

Not to be too nit-picky, but most PROM bins will command the TCC engaged in third and fourth at part throttle so that would make 6 'shifts'.... Cheers .

gruveb

I have a 115 mph speed that I'd sell to you. I got rid of my 85 mph cluster a long time ago. Now I have another in there b/c the tach didn't work on the cluster I just removed, but the individual gauges are interchangeable.