I got a 94 Del Sol DOHC vtec b16.....when cruising at 70 mph....the motor is wrapped up to 3800 RPM's in 5th gear.
@ 90 mph it is 5000 RPM's !!!!

The car is near totally stock....and definately stock 14" rims and tire size.

Is this right ? I'm just not so sure about running those kinda rpms for a long trip or something.

 

yeah, that's right

 

Short geared tranny

 

Swap an LS 5th in there?

 

cool sounds like mine. join the club noob

 

is...Iam a noob....only had my delsol for about a week. It just seems wierd cruising at those rpms.
But I guess the motor was built to take those rpms anyways, huh !?

 

Well, i used to have a delsol myself too. but yeah! all delsol or B16a is like that. Now that i swap my delsol motor to my hatch, it still does the same. When i'm on the freeway for about 80 mph my rpms is at 4,000 and all i could say is that it is normal for a B16A3.
trust meeh!

 

It isn't about "the motor is built for it". While the valvetrain of the B series is built to sustain higher RMPs than a D series, they are both manufactured out of the same materials and will have the same wear properties in the block itself...

What honda has done is traded the motors longevity for performance. The longer you sustain higher rpms, the sooner the motor will wear out (RPM stands for "ruins peoples motors). I remember Larry @ endyneracingengines.com saying that he feels sorry for any motor that cruises above 3000 rpm. That means he only drives his supercharged D series hatch at about 55-60 mph. I personally try to keep it at or below 3500 when cruising (70 mph in my CRX). This is one major factor that has keept me satisfied with my 94CX for so long. I can go about 90+mph before hitting 3500 in 5th, so cruising is really relaxing...

All in all, you shouldn't worry. I personally would just take it easy on the freeways if you really want your motor to last a good long while. By no means does that mean don't have fun with it...

 

Quote, originally posted by civichatch6989 »
yeah my mom usually makes me wear my bike helmet if i go out street racing

Haaaaaa...haaaaaaaa. lol.

Nah, sorry about that. well i guess you'll have to listen to meeh. "IT'S NORMAL" i been driving it for about a year or so and nothings wrong with it. I always go 80mph on the freeway @ 4,000rpm and nothing happen.
DON'T WORRY!!!!!!!!!

 

I would think that street, or track racing would wear it out faster than just cruising around anyway. my d16z6 puts out the same rpms as well. or close to it. I'll have to verify it.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 94eg! &raquo;</TD></TR><TR><TD CLASS="quote"> The longer you sustain higher rpms, the sooner the motor will wear out (RPM stands for "ruins peoples motors). I remember Larry @ endyneracingengines.com saying that he feels sorry for any motor that cruises above 3000 rpm. That means he only drives his supercharged D series hatch at about 55-60 mph. I personally try to keep it at or below 3500 when cruising (70 mph in my CRX). </TD></TR></TABLE>

My old VW used to cruise at around 5.5K or so, and now I have a D16Y8 that's pretty up there around 90mph. When I worked in the future product division of one of the big 3, we used to abuse engines like you wouldn't believe in the dyno area. Putting about 10 years worth of abuse in the matter of weeks.

I understand what you're saying, but after seeing the testing process; and actually trying to blow up crappy american motors, I could just imagine what the process is for Honda motors. While the higher the RPM the more friction, heat, wear etc. it's not really accellerated enough by cruising at high RPMs for me to worry about it. I've got 120K on the clock, perfect compression and my oil analysis shows excelent wear numbers.

 

Look at it as a safety issue. Our motors dont make diddly squat for power below ~3000 rpms. So if you for some reason on the highway you have to floor it and dont have time to downshift, your car will at least move a little.

 

excellent point. that was a big concern for me when i drove a mitsu mirage back in the day. there were times on the freeway when i needed to get out of the way, or speed up in order to be get rear-ended, and without downshifting to 3rd, it was not possible. I even told my mom that a GSR would be safer, because i could get out of ppl's way if need be, lol.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by matto23 &raquo;</TD></TR><TR><TD CLASS="quote"> I even told my mom that a GSR would be safer, because i could get out of ppl's way if need be, lol.</TD></TR></TABLE>

I tried that too, but she didn't buy it.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 94eg! &raquo;</TD></TR><TR><TD CLASS="quote">It isn't about "the motor is built for it". While the valvetrain of the B series is built to sustain higher RMPs than a D series, they are both manufactured out of the same materials and will have the same wear properties in the block itself... </TD></TR></TABLE>

What kind of argument is that? "wear properties in the block itself" The R/S ratio on a B16 is a lot better for high RPM driving than a D block, so materials being the same is irrelevent. The point of DOHC design is that it handles high RPM's much better.

To the OP, at the time, the CRX Del Sol with the B16 was Honda's race car for the streets, it wasn't designed for american freeways, simple as that. The tranny is geared insane close though, you can just about drive the car at 30mph in all 5 gears. I know for sure you can do 35 in 2nd or 5th!

 

I'll trade you a mint LS trans for that b16 one. You'll be at like 2500 at 70mph.

 

i put my b16a trans on my LS ======= more TORQUE then ever...blew out my driver side mount first time out in my EK...i love my b16 trans

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Falqon &raquo;</TD></TR><TR><TD CLASS="quote">What kind of argument is that? "wear properties in the block itself" The R/S ratio on a B16 is a lot better for high RPM driving than a D block, so materials being the same is irrelevent. The point of DOHC design is that it handles high RPM's much better.</TD></TR></TABLE>

First off, it wasn't any kind of argument. It was merely fact. The rod stroke ratio does NOT dictate piston speed, it only dictates the acceleration curves at CERTAIN points of the stroke. The optimization of the rod stroke ratio only helps with breathing & combustion as well as piston side loading (which keeps the motor from grenading). Materials, maintenance & clearances dictate the wear properties of the motor.

Second, just because it's DOHC doesn't mean it will last longer...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 94eg! &raquo;</TD></TR><TR><TD CLASS="quote">
Materials, maintenance & clearances dictate the wear properties of the motor.

Second, just because it's DOHC doesn't mean it will last longer...</TD></TR></TABLE>

Sums it up right there. The only reason a DOHC can rev higher is the materials and springrates used in the valvetrain.

 

the b16 has to be at that high of RPM's b/c thats where the powerband is

 

ohh your car is busted you should just sell it to me.....haha

 

What are you doing at those speeds anyhow! Thats against the law. speed limit is 65mph is most parts pal. better slow down there or Johnny Law is going to get you.

 

you make a great point. what a lunatic. lol jk

 

I know that traffic around you shouldn't dictate how fast you choose to drive but come on, if you try to drive even 75mph on the freeway in socal every other car passes you like you aren't hardly moving... I've been cruising @ 70mph on the freeway several times and had cops pass me cause I was going to slow for them and they weren't even after someone.

 

no, cops always drive fast, never signal, roll stop signs. they think they are kings and "above the law"
i was going to post some witty, cop bashing remark, but i decided to refrain, despite my right to free speech. i realize they are just trying to make a living. but there is one cop that i'm not afraid to say **** you to... behind his back. and that's the one that was telling me, "to legally moddify an exhaust, everything must be changed, from the motor to the muffler." o ya, and he said that my apexi n1 muffler was polluting the air. yet, according to him, if i get a new header, cat, res, piping, it would be ok. ******* jackass. sorry for the threadjack,