top end speed in 4th gear?

[joes407]

ive got a 92 Z-28 5.7 with the 700 r4 and 3:73 gears. it seems to me im out of gears at about 120. my friend said my 3rd should get me to almost 120 before going into 4th or overdrive. it feels to me like im in 4th at 120 and it pisses me off that i have to let off the gas for almost 2 seconds to get it to shift into overdrive at wide open throttle. any ideas what my top end should be close to gear wise and how do i override that let off to shift option?

[mullettman]

overdrive or what you say as 4th is not for speed it is just to drop you rpms down a couple notches to save gas as for the let off to shift thats normal not much can be done there even with a stick you need to do that

[Me-109]

Whatever it is, it's enough to kill you PDQ when a tire runs over something that punctures it, a pet or wild animal runs out into the road in front of you, or a tire blows-out because it's not speed rated for the speed you are asking of it. Why do you need to go so fast?

[joes407]

theres always 1 guy to say something stupid. of course we all know a tire could blow and the car could flip over or your mother might slowly pull out in front of me but none of that has any relevance to my question. believe it or not some of us do have tires rated for the speed we ask of them too. the reason ive asked this question is because of a dispute with a friend of mine. at around 88 mph at w.o.t my engine jumps rpms like i threw it in neutral. i thought it felt like my 3rd gear was done and the car was trying to goto 4th. my friend said i should get well over a hundred in 3rd yet i thought not since i had 3:73's. his argument to that was if that was the case then all camaro's with turbo 350 tranny's and 3:73's would top out at 88 mph. so please all you preacher's i could do without your 2 cents as im directing this post to people who actually have interest and knowledge in going fast and these style gear ratios.

[VetteC5RFrEak]

As far as I know, the 4L60's will not shift into OD if you are WOT. Now you could count the gears as it shifts by just normal acceleration up to highway speeds until OD kicks in. Then from there you can slowly accelerate to top out that gear, just don't hit WOT, it'll kick down.

But also, the 3rd gens are limited to 120ish. Even my 5-speed is supposedly limited. I've never checked it out personally.

And just ignore that guy ME-109. He is spouting stupid ish in a bunch of other threads too.

[Etown_RS]

The cut off on stock with out Z-rated factory tires is 110 or 120 as far as I know. Some came without the cut-off. These can do ~135-145 with stock gearing. With the stock auto, the car isn't supposed to shift into 4th at more than 50% throttle. Unless it's a B4C or Corvette. For whatever it's worth, my car's got RPMs left before shift when I hit the 120 cut off in 3rd. Accroding to an online calculator, 3rd gear w/3.73s @5500 and 26 inch tall tires, will get you 114. My 3.23s get me 131. It also shows that my car should be doing~ 68 @ 2000... but it's more like 47 according to my tach/speedo. I'm thinking that either 26 isn't the correct number for tire diameter, or my tach is really off. Found that it's 25.6. Site might be wrong?

[joes407]

ive got the cut-off programmed off with a chip & i know what that felt like when it was stock & it was at 110. i got 107 the other day before i ran up on traffic but at 88 i had to let way off then wait about 2 seconds and ease back up to full throttle. thats why i thought that was the 3rd to 4th shift. gonna have to play around more i guess. maybe ill shift manually and see what second takes me up to cuz maybe im mistaken and at 88 im hitting 3rd not 4th. which means then i might have a tranny issue.

[Me-109]

Originally Posted by joes407

theres always 1 guy to say something stupid. of course we all know a tire could blow and the car could flip over or your mother might slowly pull out in front of me but none of that has any relevance to my question. believe it or not some of us do have tires rated for the speed we ask of them too. the reason ive asked this question is because of a dispute with a friend of mine. at around 88 mph at w.o.t my engine jumps rpms like i threw it in neutral. i thought it felt like my 3rd gear was done and the car was trying to goto 4th. my friend said i should get well over a hundred in 3rd yet i thought not since i had 3:73's. his argument to that was if that was the case then all camaro's with turbo 350 tranny's and 3:73's would top out at 88 mph. so please all you preacher's i could do without your 2 cents as im directing this post to people who actually have interest and knowledge in going fast and these style gear ratios.

Sir, driving at 120 mph + on a public road is what is stupid, as well as selfish, ignorant and extremely illegal. In most states, if you get caught going that fast, it's a FELONY and you can go to JAIL for it, right away, as well as instantly have your drivers license revoked. Need to drive to your job? Well you can forget that I guess.

What is the speed rating of your tires? I'll bet you don't even know.

You are actually calling someone else stupid because you put the lives of innocent people at risk because of some sort of childish dispute with a friend?

Give me a break man. Gheesh.

[Etown_RS]

My winter tires are rated to 130 (H) while my summers are rated to 168 (Z). I agree it's not wise or safe or considerate to speed more than 10-15 over the speed limit. But it does happen and I've done it several times, but always on sections of roads with little or no traffic. And while I agree that it's not good, coming on a performance car site and preaching about not doing isn't likely to change anyone's mind.

[Me-109]

It's worth it to try and save lives and/or having someone carted off to prison because they didn't realize they were committing a felony.

I was watching a YouTube video called, "1,500 Miles in 3 Days", showing a couple of nit-wits blasting down the highway at insane speeds. One section of their video shows them being pulled over by a cop and one nit-wit says to the other nit-wit, "What kind of ticket can you get for this?"...nit-wit #2 says, "I don't know dude". Morons. They weren't even using a radar detector. The video stopped there, probably because they were hauled off to jail.

Smokey and the Bandit was a hollywood movie, not reality. Driving like that on the street isn't even close to responsible and when it puts someone's life in danger, well I feel that should be called out.

"Hey, doood...I'm sorry I killed your wife when my car t-boned her car at 120 mph, but you see I had this dispute with a friend about how fast my car could go!" Get real.

If and when the above happens, do we realize that isn't an accident? That's manslaughter and you can go to prison for a very, very, very looong time for that. Not cool man.

[Me-109]

VetteC5RFrEak spewed -

And just ignore that guy ME-109. He is spouting stupid ish in a bunch of other threads too.

I could care less what you think, you don't even know me, but let's keep the off-topic and personal attacks off of the boards, eh. Thank you very much.

It's not, "stupid ish", to advise someone to drive in a high performance manner, (which means not putting other people's lives at stake!), and helping them to realize that what they are doing is a felony and could get them carted off to jail, or even prison with a manslaughter conviction! For crying out loud man, I'm trying to help the poor guy and maybe save someone's life at the same time and you dare to flame me for it? Gheesh! Not cool.

[kcougar]

Planeman, it dosnt do any good unfortunately. weve gone over this a million and a half times. people are going to do it anyway, the majority of us dont. However, he has a legitimate tech question as our cars were not built soley to bum around at 55 miles an hour. is it irresponisble, reckless and stupid? yes. but, its a tech question, let it stand with out a blink. things like this cloud a forum. even more when its a TECH forum.

[Me-109]

Originally Posted by kcougar

Planeman, it dosnt do any good unfortunately. weve gone over this a million and a half times. people are going to do it anyway, the majority of us dont. However, he has a legitimate tech question as our cars were not built soley to bum around at 55 miles an hour. is it irresponisble, reckless and stupid? yes. but, its a tech question, let it stand with out a blink. things like this cloud a forum. even more when its a TECH forum.

Bigcatman, it was a legitimate question and the response to it was, well, we saw that. He chose to answer the question. It if was on a race track, fine and dandy, I salute that. If he wants to answer the question, accompanied with rude, derisive remarks, that's his choice and it's my choice to respond to it and point out how foolish he is in endangering himself, others and the spectre of him being carted off to prison in handcuffs. That's a legitimate response and I will stand by it.

So please let's all try to encourage responsibility and real high performance driving and not flame someone who is trying to help the poor guy and potentially save someone's life. Many of the forum members here are comparatively young, life-inexperienced folks, which is fine, we all need to learn. But that learning shouldn't come after after being pulled over by a cop for doing 120+ mph and being taken away in handcuffs with the poor person saying, "But officer I didn't know it was a felony!", 'cause you know what the response will be? "Tell it to the Judge!". A felony stays on your record forever and just about kills getting a job anywhere. I'll bet you he didn't know that either.

[project87]

Originally Posted by joes407

theres always 1 guy to say something stupid. of course we all know a tire could blow and the car could flip over or your mother might slowly pull out in front of me but none of that has any relevance to my question. believe it or not some of us do have tires rated for the speed we ask of them too. the reason ive asked this question is because of a dispute with a friend of mine. at around 88 mph at w.o.t my engine jumps rpms like i threw it in neutral. i thought it felt like my 3rd gear was done and the car was trying to goto 4th. my friend said i should get well over a hundred in 3rd yet i thought not since i had 3:73's. his argument to that was if that was the case then all camaro's with turbo 350 tranny's and 3:73's would top out at 88 mph. so please all you preacher's i could do without your 2 cents as im directing this post to people who actually have interest and knowledge in going fast and these style gear ratios.

[joes407]

wow. just for the record ME-109 im 38 years old and have plenty of "life experience" as you so put it. first off you dont know where im running these speeds, i could be on an out of service 2 mile airport runway. i dont know how they drive where you live but here the speed limit is 70 and everyone does 85 plus so quit your preachin cuz nobody wants to hear it. this is the drivetrain section not the cry baby section. if you dont believe in going fast thats up to you. maybe you shouldve joined vespa.com instead of Z-28.com