revving to 9k


Ash-EK9

Ash-EK9

Active Member
Joined
Sep 21, 2008
Messages
1,484
Hi ALL!!,

I got a spoon ecu for b16a2 and was just wandering if it was safe to rev to 9k with standard bottom end internals?

Aparantly i have ek9 cams and valve springs too...

I revved it to 9k the other night and it sounded ok and was still pulling, no missfires so i assume there is no valve bounce :nerv:
 
I rally a GTM with a B16B engine in the back,spoon manifold,good fiter set up,it made 206bhp mapped with crome at Got boost,BUT do not rev it to 9k,you will have a valve let go,the head seams to come off,i have had it happen on b16a,with Integra cams,springs.Then my B16b let go so i have gone crower cams,valves and spring set up.My car is only 840kilos so the engine isnt worked as hard as it would be in a civic.Be very carful:D
 
great lol thanks for the advise :)

ill make sure i dont make it a habbit lol:D
 
If your going by 9k on the rev counter its more like 8700-8800 from what I have found they seem to read higher than actually rpm. I ran a spoon ecu in my 9 for awhile and the rev limit was 9200rpm. I would say I probably hit 9k a few times but never ventured any higher. Stock valve springs seemed to handle it fine however if your going to be making a habit of revving that high I suggest you get some springs rated to 9k+ rpm.
 
To be honest I don't think I have sufficiant breathing on my engine to make the high revs nessesary I have a standard airbox with spoon pannel filter and a standard ugly rubbish b16a2 manifold so until I can get these areas sorted in my opinion the high revs are not doing any good! Am I right in thinking this also????
 
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I run a spoon ECU on my B16B, rev limit on the ECU is 9100, so on the clocks looks more like 9500

I've had it up near 9k many times and had it off the limiter too

It has been fine and been running this ECU for about 12k miles at least. I do change the oil/filter every 1.5k miles and other serviceables are replaced very regularly, engine is still super healthy :)

Mind you it doesn't make much power past 8600, the extra revs are just handy on track in places
 
rev it to 9K every gear when racing

but vtec6000 is right the standard clocks over read around 300 rpm
 
i would atleast do double springs on the exaust side for peace of mind, i'm not sure if the ek9 has dual springs... but have it dynoed and see if you're still making power that high up
 
Hmmm not sure if I'll do it all the time on track just when over taking I expect.

Like ob wan said I should get it dynoed to see if it's actually does anything,
I belive b16b has double valve springs so no worries there :)
 
b16b and b18c are fitted with double valve springs
 
I thought all B series had dual springs? Infact I'm fairly certain that if you want to upgrade B16A2 springs, you just buy B16B inlet springs and swap the B16A inlets to the exhaut?
 
Kozy said:
I thought all B series had dual springs? Infact I'm fairly certain that if you want to upgrade B16A2 springs, you just buy B16B inlet springs and swap the B16A inlets to the exhaut?
Click to expand...

B16A only has the dual springs on intake side
 
Ah that would be why you shift the stock B16A intake springs to the exhaust and just buy B16B/B18C intake springs to replace them?
 
Yep that's exatly what you do. I'm going to Double check I do have double valve springs on both but I'm 99% sure.......but that damn 1% may kick me up the arse :angry:
 
You guys should be very careful revving it to 9000rpm+ on generic ECU. Especially with all the mods, knocking would be something you can't measure or notice. I really dont recommend it. I've gone from 2 generic ECUs like SPOON and Js Racing and they both never really worked well.

I'm saying that because now I have a tuned Power FC with commander. Ever since then, my B16B revs very smooth and powerful with no dips. Maximum HP was achieved at 9000rpm on stock cams compared to 8200rpm untuned even though I run Toda and all the good stuff. With the added Commander display on the power FC, it records and shows knock values etc.

I cant explain the difference in words but lets just say, I still get the Vtec Kick from 5500rpm and from 8000rpm onwards to 9300rpm, it revs much faster! Like another feint power boost.
 
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you bee better off getting it rolling roaded and finding out where it stops making power, you may find there is no point at all in revving to 9000RPM
 
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