Finding the safe rev limmit
02-14-2006, 03:38 AM
#1
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Finding the safe rev limmit
So after i'm done i'll have a new engine, with a aftermarket valvetrain and such. Which brings the question, what should i do with my rev limmit.
sooo.. i'm gonna asume i'll make power above the 7, 400 or whatever the rev limmiter is on a p28.. what should i do to safely set it.. using chrome btw
99 ek
golden eagle sleeved d16z6
supertech valvetrain, oversized valves, a very ported head.
Stock cam
acl race bearings,
polished/deburred crank
eagle rods
wesco pistons 8.5:1
balanced/blueprinted
stock ignition,
a whole bunch of that boost stuff... btw
do i get the basemap, do a base run, and find out where i make power to, and then step it down a little to be safe, ? as long as the a/f ratio can be balanced ?
sooo.. i'm gonna asume i'll make power above the 7, 400 or whatever the rev limmiter is on a p28.. what should i do to safely set it.. using chrome btw
99 ek
golden eagle sleeved d16z6
supertech valvetrain, oversized valves, a very ported head.
Stock cam
acl race bearings,
polished/deburred crank
eagle rods
wesco pistons 8.5:1
balanced/blueprinted
stock ignition,
a whole bunch of that boost stuff... btw
do i get the basemap, do a base run, and find out where i make power to, and then step it down a little to be safe, ? as long as the a/f ratio can be balanced ?
02-14-2006, 04:20 AM
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02-14-2006, 04:28 AM
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if you hvae an aftermarket valvetrain, most likely, it will be able to handle whatever you throw at it. So like he said, whenever you stop making power - cut it off.
He recommends backing off a few hundred, I actually recommend adding a few hundred - just so your shift point can be better.
He recommends backing off a few hundred, I actually recommend adding a few hundred - just so your shift point can be better.
02-14-2006, 05:04 AM
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Re: (GarageAlchemist)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by GarageAlchemist »</TD></TR><TR><TD CLASS="quote">a few hundred after drop off.. scaryyy
on a side question, i just didn't wanna spam a bunch of posts.. i was gonna shave a couple grams off the valve rockers.. anyone do this, and think i would need to worry about stress ?</TD></TR></TABLE>
Scary? How so?.......i'm talking 200-300.......there's nothing wrong with that. I'm doing that right now a matter of fact - because I have an 8lb flywheel, and the rpms drop faster. So that extra 200-300 shift point helps a lot.
on a side question, i just didn't wanna spam a bunch of posts.. i was gonna shave a couple grams off the valve rockers.. anyone do this, and think i would need to worry about stress ?</TD></TR></TABLE>
Scary? How so?.......i'm talking 200-300.......there's nothing wrong with that. I'm doing that right now a matter of fact - because I have an 8lb flywheel, and the rpms drop faster. So that extra 200-300 shift point helps a lot.
02-14-2006, 05:12 AM
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Re: (TheKINGPin)
i mean just on the dyno taking the valvetrain to the limmit... supertech valves, supertech rets/stpingsported head, flowbench very well, skunk2 intake, 70mm tb,
hmm, new gaskets, valveguides, stock cam.. maybe i should do a cam.. i just don't know if a cam out there has the same core metal composition.. shrug, i like oem for cams
hmm, new gaskets, valveguides, stock cam.. maybe i should do a cam.. i just don't know if a cam out there has the same core metal composition.. shrug, i like oem for cams
02-14-2006, 05:21 AM
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nah - i think your valvetrain should definately be able to handle atleast 8500; however, your bottom end might not be able to handle it. Whatever power you're making, it should be fine valvetrain wise.
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02-14-2006, 06:22 AM
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Re: (GarageAlchemist)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by GarageAlchemist »</TD></TR><TR><TD CLASS="quote">can't go wrong with eagles and wesco's, balanced, stock crank... but should do 500whp</TD></TR></TABLE>
I think he's talking more along the lines of spinning a rod bearing or not getting enough oil to the lower end.
I think he's talking more along the lines of spinning a rod bearing or not getting enough oil to the lower end.
02-14-2006, 06:54 AM
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Re: (Everyones Hero)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Everyones Hero »</TD></TR><TR><TD CLASS="quote">
I think he's talking more along the lines of spinning a rod bearing or not getting enough oil to the lower end.</TD></TR></TABLE>
yep
I think he's talking more along the lines of spinning a rod bearing or not getting enough oil to the lower end.</TD></TR></TABLE>
yep
02-14-2006, 12:16 PM
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Re: (TheKINGPin)
and the d-series pumps suck ***. hmm, you would try porting out the oil outlet and inlet, etc. if not you may want to look into a dry sump setup if oiling concerns you that much
02-14-2006, 12:18 PM
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Re: (wantboost)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by wantboost »</TD></TR><TR><TD CLASS="quote">and the d-series pumps suck ***. hmm, you would try porting out the oil outlet and inlet, etc. if not you may want to look into a dry sump setup if oiling concerns you that much</TD></TR></TABLE>
I'm going to have to look into that.
I think it was Earl that had a thread about porting out something oil related on a d-series. I could have sworn it looked like bearings, but rob bearings don't have holes in them.
I'm going to have to look into that.
I think it was Earl that had a thread about porting out something oil related on a d-series. I could have sworn it looked like bearings, but rob bearings don't have holes in them.
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