radiantRX-7

iTrader: (1)

I was wondering what everyone shifts (max gear 3rd.-or 4th. ) on the 1/4 mile?

fastcarfreak

for a quarter mile track you should get into 4th gear. If your not getting into 4th, then your definately doing something wrong. Usually with these motors, hp peaks out right at about 6800 rpm, I find that this is the best place to shift. This way you shift right at max hp, and are right around peak torque when you enter the new gear. good luck.

mpfcc

hmmm at 6800? I usually shift at about 7800 - 8000 rpm, but I'm running non-sequential, so I have a nice hard pull to redline.

maxcooper

How to decide when to shift 101:
- You want maximum torque at the wheels at all times.
- Shift when torque at the wheels in the next gear is higher than torque at the wheels for current gear at your current speed, or shift at redline, whichever comes first.

CarTest has a "Drive Power In Gears" graph that is useful for understanding how you should choose shift points, and for estimating what they should be on the FD. I attached a "drive power in gears" graph (for a Viper). The y-axis shows the drive power (torque @ the wheels) and the x-axis corresponds to vehicle speed. There is a separate line for each gear. Shift where the lines cross, or redline, whichever comes first. On the FD, the lines usually cross before redline, so shifting before redline should be faster. As always, these are estimates -- you might have the numbers a little (or a lot) wrong, or other things unaccounted for in the model might creep in and make it inaccurate. But if you like cars and don't know this already, here's a great opportunity to learn something valuable.

-Max

mpfcc

max, is there any way you can make the picture bigger, it's too small...or if it's too big to post, email it to me: mpfcc@aol.com

maxcooper

I just stole it from the CarTest site, and I can't make it bigger. You can still download CarTest 4.5 for free, I think, which has the FD in it, and is also the version that was used to make that graph. Here's the URL: http://www.cartestsoftware.com/cartest4.5/index.html

-Max

radiantRX-7

iTrader: (1)

Thanks for everyones input

onefast3gen

iTrader: (1)

I bring it to redline, by the end of the 1/4 mile im maxing out 3rd.

jimlab

Isn't it ironic that during your posting spree last night, you actually posted in a thread which covered this exact topic and had larger pictures. Apparently you didn't have enough time to read the thread.

https://www.rx7club.com/3rd-generation-specific-1993-2002-16/high-revs-myth-fact-347195/

Generated in Excel using actual values from a stock FD dyno sheet...



Generated by CarTest 2000 with an approximated torque curve based only on the peak value...

mpfcc

Yes, but as I recall Mr. Analyze Mpfcc's Every ******* Move...the one Max posted is for a Viper right? I was curious about the VIPER graph he posted, no where on that thumbnail does it say FD or RX7, right? The one you are referring to on the other post is for an FD, right?...different car ********, so get off my nuts and don't worry about my posts. Oh and by the way, thanks for letting me know this information was generated using excel, but as I recall I didn't ask for shift points of an FD from you on excel...I asked for an analysis of your 7,900 + technical/bs posts, put them on excel and email them to me...once again a waste of productivity time jimlab, you're fired! In case you have doubts...

https://www.rx7club.com/showthread.p...6&page=2&pp=15

jimlab

Right, which is why you specifically asked about the VIPER graph. Oh wait, you didn't. You just asked about getting a bigger version of the thumbnail Max posted as an EXAMPLE to illustrate the concept he was talking about.

Maybe you didn't notice you were in the 3rd gen. section of the RX-7 Club forum. For information on Vipers, try here.

Then try www.graspingatstraws.com. They've got a chart showing how transparent the excuse is that you were looking for a chart showing VIPER shift points on an RX-7 forum, in the FD section, in a thread about FD shift points.

You're not exceptionally bright, are you.

F0RSAKEN

Ahhh the genius that is Elton John....

mpfcc

Ha you obviously have no clue jimlab, you just have to be right or else. Is it hard for you to fathom an FD owner wondering how the shift point diagram of a viper compares to an FD? BTW where did I ever say I was SPECIFICALLY looking for Viper info in an FD board??? Imagine this with your shallow thinking... You're looking at posts and you just got done looking at an FD shift point graph, you goto another post and wow low and behold somebody posts a Viper graph, you weren't looking for anything besides FD, but just out of curiousity you want to see how our beloved FD compares to a Viper...but hold on it's just too small to see clearly, so you ask the person how posted it if he can enlarge it...

And don't tell me that if you click on that thumbnail you can't see that it says VIPER.

If you look at my post times I posted on this thread @ 12:48 am (09/14/04)

https://www.rx7club.com/showthread.p...5&page=3&pp=15

I asked max if he could blow up that pic @ 2:55 am on this post (09/14/04)

https://www.rx7club.com/showthread.p...81#post3499181

So you are telling me that in that 2 hour period it's not possible for me to see that graph, move to the next and see a viper graph and want to see how the two compare. Nowhere did I SPECIFICALLY ask for the shift graphs on either. I suggest you get off your high perch, you may have technical knowledge valuble to this board, but you don't know **** when it comes to me. What's the point of flaming me, just because one night I decided to be very active on the board? Or is it because you aren't getting any at home and you're frustrated?

F0RSAKEN

Maybe...he likes to incite people who are easily pushed off the edge of emotional stability?

jimlab

You didn't, and that's the point. You blasted me for posting shift charts for the FD in a thread about FD shift points, and there was nothing in your post whatsoever that indicated that you were interested in the example Max posted because it pertained to the Viper. Therefore, the logical assumption was that you were looking for FD shift charts, because you DIDN'T SPECIFY.

I do know one thing about you... you won't be posting here much longer if you keep this up.

Here's your VIPER (1997 Viper GTS) shift chart...

Mahjik

iTrader: (1)

Keep the thread on topic. Leave the personal bantering to PM's.