Revving high is not good on an LS? - Honda Forum / Acura Forum

skibbs · 05-20-2002, 12:08 AM

I've heard a few places that revving high on a stock B18B is not very good for it. I've never heard any reasons why though, does anyone know WHY it is bad? And by revving high do they mean above the stock rev limit? I usually take mine to 6500-7k a few times a week and really would like to know what is a safe range to rev to before I

break somethin... BTW I run a 55 shot of nitrous now and will be going turbo in the next couple of months on stock internals...
Thanks,
Matt

StyleTEG · 05-20-2002, 08:00 AM

I beleave this is mainly because LS engines have a short rod ratio.
The vtec engines also have other features which ensure safety while reving high. These include oil squirters, upgrade valvetrain (?), etc.

GunNam · 05-20-2002, 02:29 PM

Is there a way to put oil squirters on an LS? If not, would a moroso oil pan help? And if anyone has one of these Moroso units... does it hang lower than the stock oil pan?

Tapeworm · 05-20-2002, 07:46 PM

Heres an answer for you... Dont be dumb. Free reving your engine is a waste of gas and in some cases, of a good engine. Its ok to get your RPMS up high when your racing if you do that every once in awhile (not every 5 minutes). Also, dont respond if you dont know jack. If you want a higher reving engine then you could do a few things. LSVtec, Valvetrain upgrade, internal Upgrade and such.... Remember, He who walks with the wise grows wise, But a companion of a fool suffers harm.

XPystchrisX · 05-21-2002, 04:52 AM

ls/vtec is a horrible idea. the 1.54 r/s ratio of a ls motor is shitty to start with and you will simply make the side loading on the pistons worse if you start reving the motor higher.
as far as reving the motor out... think of it this way. my d16a6 with 140k on it is beat to hell by me. i have almost the same r/s ratio as you do and i consistantly take it to redline all the damn time. use synthetic mobile one or amsoil and a good filter, change the oil every 3000 miles and check on your fluids every two weeks. make sure your motor's tuned... pay attention to how your car is running and you're golden... 'cept for an act of God or something... then you're just fucked.

Tapeworm · 05-21-2002, 05:19 AM

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use synthetic mobile one or amsoil and a good filter, change the oil every 3000 miles and check on your fluids every two weeks. make sure your motor's tuned... pay attention to how your car is running and you're golden...
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If he didn't know this previously then I wont even bother anymore...

LS/Vtec setup all depends on how well you did it, how much time you put into it and how well you take care of it. I know people with the LS/Vtec setup who wish they never got it, but then there are those who swear by it. I'm not saying go do this right now because it will cost a fair amount of money but its just something to look into maybe.

XPystchrisX · 05-21-2002, 06:30 AM

ehhh... i've had an ls/vtec and i guess i'm one of those people who just doesn't like them. it wasn't anything special... but at first it was great. then slowly but surely... as i had it longer... it fell apart to the point where i just got rid of the damn thing. and as far as having it done correctly... i thought at the time i was getting that done. but apparently you just can't do it without major internal work... 'cause mine just ended up grenading.

skibbs · 05-21-2002, 10:53 AM

My main concern was when I go turbo on my stock internals. I thought that maybe I should keep my rpm below 6200 while boosting at around 7 PSI. I know higher RPM are much harder on your engine than increased output so I was just wondering if there was a general rule regarding revving versus output on a stock B18B. For example if I am boosting at 7 PSI on stock internals should I limit my rpm to 6000? Just a general idea would be nice...
Thanks,
Matt

XPystchrisX · 05-21-2002, 10:57 AM

i've never had a turbo car at all... so my answer here is all speculation... i have however known a few people with turbo cars and they all rev their cars directly to redline. the only person who i've heard of limiting his rpm was a guy with a turbo protege... and he only limited his rpm because his intercooler piping was flexing. he thought that maybe at 7000 rpm, redline on that motor, his piping might implode or something. he now has high strength silicone piping and doesn't have that problem at all. however he was running his car at approx 25psi so i'm thinking that at 7psi you'll be ok aslong as you have good piping and good fuel managment.

Etylorcen · 05-21-2002, 12:53 PM

I take my car to redline often....just dont try revvin' the hell out of it to like 8000rpms. It was designed to be taken to ~7k I dont see anything wrong with it. Of course running your car hard all the time isn't going to be good for it tho.

nov0798 · 05-21-2002, 03:19 PM

ok if you dont exceed the posted redline then you are ok, this is why there is a redline. even at redline, your engine is still safe as the honda engineers would not have made the engine to come apart at the exact redline on the tach. as for turbo charging, its not boost that hurts the engine, its poor tuning. as for running boost on stock internals, you can run it just fine as long as you keep your pressure down to a normal level. if you plan to run like 8+ on it then save some money and do it right with the proper parts.

rufus`` · 05-21-2002, 03:35 PM

the peak hp rating for a b18b1 is at 6400 rpm. there is also a rev limiter at 7300 or so. so, as long as you dont downshift when you're above 5000 rpm, you should be fine. 6700 should be about your limit, as it gives you a little more time in the highest power band.

buckshot · 05-21-2002, 03:39 PM

Quote:

Originally posted by skibbs
My main concern was when I go turbo on my stock internals. I thought that maybe I should keep my rpm below 6200 while boosting at around 7 PSI.
Thanks,
Matt

tuan told me once why run 7 PSI on a car, that's like drinking 1 beer but you whant 2 get drunk.you can run 10 PSI on stock internals and run for a long time,now back 2 your rpms 6200 would be fine on turbo,even with out.our cars are made for reving high,just don't rev so you are in the red all the time.a friend of mine had a civic si(as you see i said HAD)i told him and told him not 2 rev in the red so much,but he did it any way.well his car sits in his front yard with a blown motor,he bint 2 rods and burn up 3 valves.i felt bad for him but thats his own damn falt.

White98LS · 05-21-2002, 04:58 PM

Yeah like other people said, if you take care of it, and rev it to, not into, the redline once in a while you should be fine. And if you go into the redline just a little bit on accident (below the rev limiter at 7200-7300) it's okay. My buddy told me that Honda once tested one of their engines by, I forget exactly how they did, but it involved draining the oil on an engine with only a few miles on it, then running it constantly at redline for thousands of miles. And indeed it lasted for thousands of miles before it finally died. Try doing that with a GM or Ford engine!

skibbs · 05-21-2002, 10:41 PM

I'd like to start off boosting at 7 PSI and eventually bump up to 9 but not until I buy all the extra goodies to ensure that my engine will be alright. Thanks for all your input, I feel better... I was getting nervous because I go to near redline a few times a week, but it sounds like with good maintenance and not actually hitting the fuel cutoff I'll be fine.
Matt