Well I'm really considering a C5 for my daily driver. The biggest concern to me is the RPMs I will be at on the freeway due to the gears... at what RPM do you guys with C5's sit at about 80-85 mph?

I do a lot of highway driving for work, and have no problems putting the miles on the motor, but I dont want to cause problems with the sustained RPMs...

 

80mph = 5000 rpm for me

 

hmm sounds like my old 1st gen b16 gears maddd short maybe I can find a LSD gsr tranny for it

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by .nate &raquo;</TD></TR><TR><TD CLASS="quote">Well I'm really considering a C5 for my daily driver. The biggest concern to me is the RPMs I will be at on the freeway due to the gears... at what RPM do you guys with C5's sit at about 80-85 mph?

I do a lot of highway driving for work, and have no problems putting the miles on the motor, but I dont want to cause problems with the sustained RPMs...</TD></TR></TABLE>

Keep in mind that the C5 (and the other DOHC VTEC motors) is not your average motor. It is made for sustained high revs. Just keep that engine maintained, use good oil, and it will last.

 

80mph - 4000 rpm in 5th gear

 

I drove my built LSVTEC from AZ to NC, Crusing at about 4400 RPM / 70mph

Oh, I've got the same B16 1st gen tranny probably, but I plan on putting an LS 5th gear in it.. might be a good idea for you...

 

Yeah I had the LS 5th gear in the back of my mind... hmm I just dont know if I wanna try cracking my first tranny open on a c5 tranny

 

around 5200 around 80 with a ctr.

 

you need to make sure that you dont drop out of your powerband with that ls gear.

 

http://crx.honda-perf.org/math/index.html

that should help

 

[QUOTE=LSVTEC 91 Civic]I drove my built LSVTEC from AZ to NC, Crusing at about 4400 RPM / 70mph
QUOTE]

i think my grandma past yu going 85 in her buick. .....LOL...

 

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

Keep in mind that the C5 (and the other DOHC VTEC motors) is not your average motor. It is made for sustained high revs. Just keep that engine maintained, use good oil, and it will last.</TD></TR></TABLE>

i think he may be more concerned with gas mileage?? if thats the case i would go with a ls 5th.

personally when im highway cruising i could care less about keeping the car in powerband etc. i just want good fuel economy. the gsr is not much better, i think mine does about 4k-4500rpm at 80mph. but i usually cruise closer to 100mph. so mine sits around 5krpm.

 

98 spec itr in my ek. runs at about 4500 in 5th at 80

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 99b18 &raquo;</TD></TR><TR><TD CLASS="quote">

i think he may be more concerned with gas mileage?? if thats the case i would go with a ls 5th.

personally when im highway cruising i could care less about keeping the car in powerband etc. i just want good fuel economy. the gsr is not much better, i think mine does about 4k-4500rpm at 80mph. but i usually cruise closer to 100mph. so mine sits around 5krpm. </TD></TR></TABLE>

My B18C5 CRX (1G B16A transmission) does GREAT on gas (32+MPG).

 

i drive 80 miles one way to work with my B16 88 Civic.....4500 RPM there and 4500 RPM back. No problems here, I have been driving with this setup since March of this year.

 

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

My B18C5 CRX (1G B16A transmission) does GREAT on gas (32+MPG).</TD></TR></TABLE>

must be nice. i can barely get 350km to a tank of gas, which is about 40litres.

oh and a correction. my gsr is actually 4400rpm at 80mph(i think, its 140km/h, so 80mph is prety close to that)

 

4k here at 80 4.4 fd

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 99b18 &raquo;</TD></TR><TR><TD CLASS="quote">

must be nice. i can barely get 350km to a tank of gas, which is about 40litres.

oh and a correction. my gsr is actually 4400rpm at 80mph(i think, its 140km/h, so 80mph is prety close to that)</TD></TR></TABLE>

What kind of setup do you have? That sounds HORRIBLE. So bad that something MUST be wrong.

 

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

What kind of setup do you have? That sounds HORRIBLE. So bad that something MUST be wrong.</TD></TR></TABLE>

dont mean to invade on the thread. but since u asked.

its a 99gsr in a civic dx.
-11.5/1 cr pistons
-skunk IM
-dc header
-310cc injectors
-255lph fuel pump
-p&p head
-crower stage2 cams
-all tuned on a hondata s200.
think thats the most of it. but that should explain the shitty fuel mileage. i had hoped i could get a little more from this set up. and thats with conservative driving as well. i think my worst was about 315km to the tank. i was runnin in vtec alot, autocrossin and what not.