Hey guys, I have a quick question. I've got a 93 Civic EX, D16z6 with I/H/E. If you have had experience with this car, what are the best shift points when racing in your oppinion. Thanks.

 

No input? I'll just let it pop off the rev limiter for a few seconds then. Lol, seriously, anybody have suggestions?

 

Shift right at redline?

 

every engine is different. you can figure it out if you have a dyno chart and your gear ratios though.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by yeah_its_slow &raquo;</TD></TR><TR><TD CLASS="quote">Hey guys, I have a quick question. I've got a 93 Civic EX, D16z6 with I/H/E. If you have had experience with this car, what are the best shift points when racing in your oppinion. Thanks.</TD></TR></TABLE>

on my hatch the rev limiter is at 7.5 so when i used to street race i would wait till the needle was about to hit rev limiter then speed shift so there wouldnt be any "over revving"

and litterbox mentioned shifting at redline which is logical, but i noticed that when i would shift at redline from 2nd to 3rd i would drop out of vtec by ~200-300 rpms, but when i would wait till rev limit i would stay in vtAAAAKKK lol

 

find out what rpm's the peak power for your car is then shift there...any past that and you are potentially slowing yourself down

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by x_outlaw_x &raquo;</TD></TR><TR><TD CLASS="quote">find out what rpm's the peak power for your car is then shift there...any past that and you are potentially slowing yourself down</TD></TR></TABLE>

not always true. that depends on how fast the power falls off. Usually you want to rev a little past peak power.

 

just power shift all the way, followed by a double clutch :D

 

i agree with you about slowing it down...my peak power is at 6800 so i shift at 7k, because after 7k it drops like the stock market in the great depression

 

Shift at the redline.

 

i've got a z6-t and my powerband levels off around 6500, I shift @ 6900.

 

shift 500rpms past max power which usually always ends up being the factory redline (on a stock engine). If you have mods get on a dyno and get some graphs. You want to have the most area under the curve.

 

i hate hitting vtak because its so loud.... they need to make a silencer for VTAK YO!

 

i used to shift mine at 8500... governer was at 8600..stock z6 y8 intake manny cai.. twin cam top 99ex down manifold. no cat 2 1/4 straight pipe... i know everyones gonna say dumb **** for over revving. but when u get 3 tenths of a second better time in the eigth.. damn...so far with a time of 9.72 in the eigth if i run the stock ecu.. i get 10.02

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by siregcivic &raquo;</TD></TR><TR><TD CLASS="quote">i used to shift mine at 8500... governer was at 8600..stock z6 y8 intake manny cai.. twin cam top 99ex down manifold. no cat 2 1/4 straight pipe... i know everyones gonna say dumb **** for over revving. </TD></TR></TABLE>

I take my H to 8k in 1st and about 7800 in 2nd at the track (both overrevving). 3-4 shift is at 7400. Peak power is just under 7k. if you know the motor can take it, its not necessarily a bad idea. It took a lot of passes in the 1/4 before I figured out my shift points, but its fastest that way. I don't recommend overreving your motor unless you are confident it can take it though, it is asking for problems.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by siregcivic &raquo;</TD></TR><TR><TD CLASS="quote">i used to shift mine at 8500... governer was at 8600..stock z6 y8 intake manny cai.. twin cam top 99ex down manifold. no cat 2 1/4 straight pipe... i know everyones gonna say dumb **** for over revving. but when u get 3 tenths of a second better time in the eigth.. damn...so far with a time of 9.72 in the eigth if i run the stock ecu.. i get 10.02 </TD></TR></TABLE>


Well at least it was at the track. It drives me crazy when people rev to 821001512154rpms on the street.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by IHateJDM &raquo;</TD></TR><TR><TD CLASS="quote">I don't recommend overreving your motor unless you are confident it can take it though, it is asking for problems. </TD></TR></TABLE>

yes i know.. the motor has been in the car for little over a year now and i have had the ecu in there for 7 months.. its been fine.. thats why i stand by my z6's all the way... except ive been thinking of swapping out single cam for b16 second gen from japan with type r tranny because i wanna start scca or autocrossing.. and i dont think the z6 can hold up high revs like while racing for a long-er period of time..not just going straight but holding high revs through teh turns.. soo.. well see whats gonna happen

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by siregcivic &raquo;</TD></TR><TR><TD CLASS="quote">
except ive been thinking of swapping out single cam for b16 second gen from japan with type r tranny because i wanna start scca or autocrossing.. and i dont think the z6 can hold up high revs like while racing for a long-er period of time..not just going straight but holding high revs through teh turns.. soo.. well see whats gonna happen </TD></TR></TABLE>

I would stay single cam for autocrossing. the motor is lighter and it makes the car feel more nimble. power isn't that important in autocross either. Now if you are ever going to run a road course, thats a different story.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by IHateJDM &raquo;</TD></TR><TR><TD CLASS="quote">

not always true. that depends on how fast the power falls off. Usually you want to rev a little past peak power.</TD></TR></TABLE>

Right. The goal is to have the most power in whatever gear you're in. You may not be making any more power but you still might have more power than if you shifted to the next gear.