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Old 10-20-2010, 10:36 PM   #1
silverongold
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02 impreza wrx
silver

Default suggest my rev limit

I would like to know what you guys think would be a good rev limit for my motor.

specs:
ej20g, closed deck
weisco pistons stock compression
scat forget h beam rods
acl race bearings
crank? i think it is out of a 2.2 motor and has bigger oil journals
08 sti oil pump ( i believe it is a 11mm or some thing large)
bc 272 cams
shim less buckets
ferrea and bc valves. stock size
I may have forgotten some stuff. Please ask if some thing is un clear, and thank you in advance for the advice.
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Old 10-21-2010, 04:01 AM   #2
alcoolaid
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Probably to be safe keep it around 8000. Just make sure you have oil pressure.
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Old 10-21-2010, 12:54 PM   #3
silverongold
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i have been at 7500 but figured it could do a bit more. what oil pressure should i be at?
not sure if this affects it but i do have a moroso oil pan and mishimoto oil cooler.
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Old 10-21-2010, 03:44 PM   #4
mtcs
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It's really up to your oil pump. The fact that you are using an 08 11mm pump is good.
P&L makes a ported 08 oil pump that can handle higher rpms. I have it on my build and plan to see 8500 all day long and maybe closer to9k once in a while. After the ported 11mm (larger than the 12mm JDM pump) the next step would be a drysump system. Sadly, not too many people have $3500 lying around though. lol

On your build with your pump, I'd stay close to 8300rpm max. 8000 on the safe side.
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Old 10-21-2010, 04:22 PM   #5
seanathanq83
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good info im building my ver8 and i will be using the 11mm oil pump wanting to run 8000-8250
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Old 10-21-2010, 04:52 PM   #6
silverongold
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what should i watch for as far as oil pressure?
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Old 10-21-2010, 05:29 PM   #7
phlegmon
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10psi per 1000rpm. Example: 8,000 rpm = at least 80psi. 9000 rpm = at least 90psi. It's a rule of thumb but effective. Make sure your valve springs can handle it...
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Old 10-21-2010, 08:18 PM   #8
silverongold
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i forgot that i am runnig bc valve springs and titanium retainers.. . .? as far as handling the revs will that do a 8k rev limmit? with my turbo i do not think reving it much higher will even matter for now.
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Old 10-21-2010, 08:29 PM   #9
CKxx
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Your BOV sounds lame
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I think we are putting the cart before the horse.

What turbo do you have?
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Old 10-21-2010, 08:32 PM   #10
silverongold
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I have the tomei arms turbo on now.
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Old 10-21-2010, 08:37 PM   #11
Speed
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suggest my rev limit
_____________

500-600 rpm after peak power.
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Old 10-21-2010, 08:40 PM   #12
silverongold
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prob next friday i will be tuning again and spending some time on the waste gate so maybe i can get it to hold power a little longer for a higher rev.
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Old 10-21-2010, 08:47 PM   #13
silverongold
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ckxx, why cart before the horse? what are you thinking?
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Old 10-21-2010, 10:11 PM   #14
TuTudtee
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from my opinion, try to set your max. rpm as low as possible ... the gear ratio is also another factor not to be forgotten .... high revs beyond the power band is not much benefitial ..... just rev high enough to keep you in the power band when shifted.
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Old 10-22-2010, 12:04 AM   #15
CKxx
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Your BOV sounds lame
93 RX7+09 Forester

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Quote:
Originally Posted by silverongold View Post
ckxx, why cart before the horse? what are you thinking?
I meant that without knowing your turbo or powerband than there was no point guessing what you should rev it to. I'm not familiar with that turbo. How many lbs/min does it flow?
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Old 10-22-2010, 12:21 AM   #16
Garrek11
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I suggest a oil pan baffel...
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Old 10-22-2010, 12:56 AM   #17
project_skyline
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If he is drag racing setting the rev limit to 500 above peak power is a really stupid suggestion.

With cams and a good flowing turbo it might still make power up to 7500-8000.

Anything higher would be beyond efficiency of stock location turbo tho.
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Old 10-22-2010, 12:54 PM   #18
the suicidal eggroll
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I wouldn't go any higher than 7500 unless you had your entire rotating assembly professionally balanced before dropping it in (pistons, rods, crank, flywheel, pressure plate).

If you did, then 8k should be fine.
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