:::RHMT::: Real Home Made Turbo

Please login or register.

Login with username, password and session length
Advanced search  

News:

AJ's 1966 Nova LSX twin turbo build! (link)

Pages: 1 [2]   Go Down

Author Topic: rev limiter  (Read 13777 times)

Joseph Davis

  • Verbal Assault Technician
  • Moderator
  • Certified OG
  • *****
  • Offline Offline
  • Posts: 34733
  • Eugenics prevents retards like widebody93
    • TURBO THIS
Re: rev limiter
« Reply #30 on: April 05, 2009, 11:28:49 PM »

I live in a fairly upscale area, Jon, there are no Subarus here earlier than ~94, and nothing lowrent like a Justy or SVX (checked the resale on those lately?).

Joseph Davis

  • Verbal Assault Technician
  • Moderator
  • Certified OG
  • *****
  • Offline Offline
  • Posts: 34733
  • Eugenics prevents retards like widebody93
    • TURBO THIS
Re: rev limiter
« Reply #31 on: April 06, 2009, 05:25:31 AM »

Funny, KBB doesn't list a price on SVX that breaks $4K.  You must live in a very affluent area where old piece of shit automatic transmission Subarus are in high demand, for one to sell for $4-7K.  Also, I'm not finding a Justy that breaks $1500.  Your economy would have to be booming to sustain such a market.  Any luck finding a job?

SirDragsAlot

  • Jr. Member
  • **
  • Offline Offline
  • Posts: 45
  • if you aint baggin' you aint draggin'
Re: rev limiter
« Reply #32 on: April 07, 2009, 09:17:13 PM »

what i woudnt give to find a mint suby justy, no rust and 5 speed.  they rocked
Logged

Conceptz-X

  • Certified OG
  • *****
  • Offline Offline
  • Posts: 2118
Re: rev limiter
« Reply #33 on: April 24, 2009, 09:23:20 PM »

My 83 supra saw 8500 a few times  ::)

No limiter, just kicked out cam followers.

Yes, every ECM will limit at some point, but if the engine has the capacity to reach it is another story
Logged

Kain

  • Certified OG
  • *****
  • Offline Offline
  • Posts: 6030
Re: rev limiter
« Reply #34 on: April 27, 2009, 10:59:01 AM »

if you blo a rear rotor in an rx7, it will rev to the moon.

Conceptz-X

  • Certified OG
  • *****
  • Offline Offline
  • Posts: 2118
Re: rev limiter
« Reply #35 on: April 27, 2009, 08:12:49 PM »

o
if you blo a rear rotor in an rx7, it will rev to the moon.
or till the ignition cannot keep up
Logged

Kain

  • Certified OG
  • *****
  • Offline Offline
  • Posts: 6030
Re: rev limiter
« Reply #36 on: May 09, 2009, 01:55:09 PM »

o
if you blo a rear rotor in an rx7, it will rev to the moon.
or till the ignition cannot keep up


why cant it keep up? it will kep up just fine.

How to kill a Wankel Rotary
« Last Edit: May 09, 2009, 01:57:39 PM by Kain »
Logged

ratcityrex

  • I Get Blown Daily
  • Global Moderator
  • Certified OG
  • *****
  • Offline Offline
  • Posts: 7374
Re: rev limiter
« Reply #37 on: May 11, 2009, 11:07:25 AM »

That fucking thing sounds just like my 2stroke weed eater....lol
Logged
New setup is old bottom end with a hype r head with gsr cams. built lsv with hx35 @ 26psi on pump gas
LEED tuned! 434hp/329tq http://www.youtube.com/watch?v=_pbDXZxZdZs
http://www.realhomemadeturbo.com/forum/index.php/topic,16195.0.html

Old Setup B18a1 296hp/289tq LEED Tuned 20psi on pump! http://www.youtube.com/watch?v=2Yj-Z90j4W4   
http://www.realhomemadeturbo.com/forum/index.php/topic,205.msg2437.html#msg2437

MantisX

  • Sr. Member
  • ****
  • Offline Offline
  • Posts: 362
Re: rev limiter
« Reply #38 on: May 11, 2009, 11:30:24 AM »

Funny how that works. If they wanted it to actually run for a while it wouldnt have.
Logged

DmC

  • Certified OG
  • *****
  • Offline Offline
  • Posts: 3036
Re: rev limiter
« Reply #39 on: May 11, 2009, 02:03:27 PM »

It just shows that reving an engine in nuetral doesn't really hurt them at all. if they had left the radiator cap on it probably would have ran all day at 9k.
   
Logged

Kain

  • Certified OG
  • *****
  • Offline Offline
  • Posts: 6030
Re: rev limiter
« Reply #40 on: May 12, 2009, 02:18:27 AM »

yah, no load plus mucho revs != anything.

usually guys that go anything higher than stock or use a 3rd gen water pump switch to an electrical unit. its better over all as you dont get cavetation past 10k rpms.

patsmx5

  • Certified OG
  • *****
  • Offline Offline
  • Posts: 1584
Re: rev limiter
« Reply #41 on: May 18, 2009, 07:43:47 PM »

It just shows that reving an engine in nuetral doesn't really hurt them at all.
:?:
Logged
Quote: Originally Posted by Adam Hopkins
There is no such thing as too much boost. You could have too little rod, piston, or sleeve. But never too much boost.

Conceptz-X

  • Certified OG
  • *****
  • Offline Offline
  • Posts: 2118
Re: rev limiter
« Reply #42 on: May 18, 2009, 09:17:24 PM »

It just shows that reving an engine in nuetral doesn't really hurt them at all.
You going to test that theory that on your shit?  I wouldnt

I know when I was working R&D for HTG racing we'd twist crankshafts at the end of a dyno pull when the load releases at 8000+ RPM.  Engine would be fine through the pull, but never run the same again till the crank was re-phazed.
Logged

dvst8r

  • Certified OG
  • *****
  • Offline Offline
  • Posts: 3737
  • Unobtainium
Re: rev limiter
« Reply #43 on: May 18, 2009, 09:33:46 PM »

It just shows that reving an engine in nuetral doesn't really hurt them at all.
You going to test that theory that on your shit?  I wouldnt

I know when I was working R&D for HTG racing we'd twist crankshafts at the end of a dyno pull when the load releases at 8000+ RPM.  Engine would be fine through the pull, but never run the same again till the crank was re-phazed.

Going from high load to no load is not even close to the same as never having a load.
Logged
There are two kinds of people: Sheep and sharks. Sharks are winners and they don'#039#039t look back '#039#039cause they don'#039#039t have necks. Necks are for sheep.

DmC

  • Certified OG
  • *****
  • Offline Offline
  • Posts: 3036
Re: rev limiter
« Reply #44 on: May 19, 2009, 06:10:25 PM »

It just shows that reving an engine in nuetral doesn't really hurt them at all.
You going to test that theory that on your shit?  I wouldnt

I know when I was working R&D for HTG racing we'd twist crankshafts at the end of a dyno pull when the load releases at 8000+ RPM.  Engine would be fine through the pull, but never run the same again till the crank was re-phazed.
Yeah I have more then a few times. I never blown up an engine bouncing it of the rev limiter.   One time in eastern KY I had my kx125 save my life from falling off a cliff It was a steep trail on a cliff face it had just rained the trail had a switchback going up I bogged the bike down going up it tried to just step off but it was so slick I was sliding backwards toward the edge.

 I still had the bike running so with my hand I shifted it into first and ran it wot with me standing beside it and it pulled me up the hill t the next shelf. It took about five minutes to. That was luck and skilz son.  :noel:  two strokes are awesome.
Logged

Conceptz-X

  • Certified OG
  • *****
  • Offline Offline
  • Posts: 2118
Re: rev limiter
« Reply #45 on: May 19, 2009, 08:00:31 PM »

It just shows that reving an engine in nuetral doesn't really hurt them at all.
You going to test that theory that on your shit?  I wouldnt

I know when I was working R&D for HTG racing we'd twist crankshafts at the end of a dyno pull when the load releases at 8000+ RPM.  Engine would be fine through the pull, but never run the same again till the crank was re-phazed.

Going from high load to no load is not even close to the same as never having a load.
Load was not released until after the ign was killed.

Many cars will live forever against the limiter.  thats why its there.  But to free rev an engine that has no limiting will self destruct provided it has adequate valve spring pressure to achieve such RPM (floating valves will act as a limiter)
Logged

Joseph Davis

  • Verbal Assault Technician
  • Moderator
  • Certified OG
  • *****
  • Offline Offline
  • Posts: 34733
  • Eugenics prevents retards like widebody93
    • TURBO THIS
Re: rev limiter
« Reply #46 on: May 20, 2009, 12:12:18 AM »

It just shows that reving an engine in nuetral doesn't really hurt them at all.
You going to test that theory that on your shit?  I wouldnt

I know when I was working R&D for HTG racing we'd twist crankshafts at the end of a dyno pull when the load releases at 8000+ RPM.  Engine would be fine through the pull, but never run the same again till the crank was re-phazed.

You can snap/stretch rods or tweak the crank when you suddenly shut the throttle, too.  Thankfully that sort of thing only happens to poorly designed pieces of shit.

I've watched D16A6 live on the revlimiter for years.  Literally.  There was a mexican't who'd cruise the local strip with his CRX held against the limiter in first gear, that lasted for the year and a half it took him to wad the car up in a ditch.

Conceptz-X

  • Certified OG
  • *****
  • Offline Offline
  • Posts: 2118
Re: rev limiter
« Reply #47 on: May 20, 2009, 09:23:57 PM »

yes, poorly designed, due to the crank being modular in design to accomodate roller bearings.  If the crank could be forged in one piece, I believe it would never fail like that.  The only time we had that kind of failure was on the dyno, never at the track, well, unless we broke a drive belt and over-revved the piss out of it because the CDI boxes we used had the limiters removed.
Logged

Conceptz-X

  • Certified OG
  • *****
  • Offline Offline
  • Posts: 2118
Re: rev limiter
« Reply #48 on: May 20, 2009, 09:28:33 PM »

and 260-280 HP 2-stroke on one liter naturally aspirated is pretty decent
Logged

Joseph Davis

  • Verbal Assault Technician
  • Moderator
  • Certified OG
  • *****
  • Offline Offline
  • Posts: 34733
  • Eugenics prevents retards like widebody93
    • TURBO THIS
Re: rev limiter
« Reply #49 on: May 20, 2009, 09:35:22 PM »

400 whp/liter is the barrier that impresses me. 
Pages: 1 [2]   Go Up