Attention: Guests by accessing CRO, you agree to the site terms. Please read the terms of CRO Click Here

« previous next »
Pages: [1] 2 3

Author Topic: Mini Stock Rules  (Read 8362 times)

0 Members and 1 Guest are viewing this topic.

Offline 240racer

  • Series Owner
  • *****
  • Posts: 283
Mini Stock Rules
« on: October 28, 2007, 10:15:15 PM »
Im a little confused with the 4 cyl rules at barrie and sunset....If were allowed to bore them out but the motor has to be "stock" what are our options for legal pistons??

Linkback: https://www.canadianracingonline.com/smf/index.php?topic=6908.msg35766#msg35766
Logged

CanadianRacingOnline.com

Mini Stock Rules
« on: October 28, 2007, 10:15:15 PM »

Offline Thayne

  • Series Owner
  • *****
  • Posts: 3465
Re: Mini Stock Rules
« Reply #1 on: October 28, 2007, 11:17:14 PM »
Quote from: 240racer on October 28, 2007, 10:15:15 PM
Im a little confused with the 4 cyl rules at barrie and sunset....If were allowed to bore them out but the motor has to be "stock" what are our options for legal pistons??

We are allowed .30 over pistons and rings my friend..

Linkback: https://www.canadianracingonline.com/smf/index.php?topic=6908.msg35768#msg35768
Logged

Offline 240racer

  • Series Owner
  • *****
  • Posts: 283
Re: Mini Stock Rules
« Reply #2 on: October 28, 2007, 11:27:58 PM »
yes, but can they then lightweight or flat top...because now they arent OEM and there a hundreds of options...whose to say one is legal and one is not

Linkback: https://www.canadianracingonline.com/smf/index.php?topic=6908.msg35770#msg35770
Logged

CanadianRacingOnline.com

Re: Mini Stock Rules
« Reply #2 on: October 28, 2007, 11:27:58 PM »

Offline JoeChance

  • Car Owner
  • ****
  • Posts: 138
Re: Mini Stock Rules
« Reply #3 on: October 29, 2007, 04:59:00 AM »
 All the manufactures make a replacement piston or they are available from an after market company . If your motor came with cast dish pistons you can not replace them with forged or flat top . I will bet most the tech guys cant tell the difference between a forged or cast piston simply by looking at the tops of them with the head off . How ever they can all read a compression gauge .
 Most the Jap OEM pistons are more the tough enough for racing and after you have decked the block and or milled the head your going to be maxed for the compression rules . Remember there is almost no performance gain from boring the engine 25 or 30 thou . A better way to gain performance on many of the 4 bangers is to work on the water jackets/ pump and use a better rad so you can lean on the motor harder with out it getting hot  ( #1 cause of melting pistons). Rather then spending hundreds on forged pistons try slowing down the water pump (pulleys from 20 bucks and up) since most of them spin too fast because they were made for street conditions .

Linkback: https://www.canadianracingonline.com/smf/index.php?topic=6908.msg35774#msg35774
Logged

Offline 240racer

  • Series Owner
  • *****
  • Posts: 283
Re: Mini Stock Rules
« Reply #4 on: October 29, 2007, 04:03:41 PM »
thanx JoeChance.. I am looking at engine options for next year because when the track did a compression test on me it was very low and i need a way to bring it back up, and im not that expeienced when it comes to engines internals.

Linkback: https://www.canadianracingonline.com/smf/index.php?topic=6908.msg35801#msg35801
Logged

Offline Kahnefreak

  • Melson Mafia
  • Series Owner
  • *****
  • Posts: 1584
  • Melson Racing
    • http://www.piczo.com/gpsracing
Re: Mini Stock Rules
« Reply #5 on: October 29, 2007, 04:10:03 PM »
Joe Chance, at Barrie you are not allowed to deck the block. you can clean up the head, but no excessive shaving is allowed!

Linkback: https://www.canadianracingonline.com/smf/index.php?topic=6908.msg35802#msg35802
Logged
"2nd place is just the first loser"

Offline JoeChance

  • Car Owner
  • ****
  • Posts: 138
Re: Mini Stock Rules
« Reply #6 on: October 29, 2007, 04:59:43 PM »
Quote from: Kahnefreak on October 29, 2007, 04:10:03 PM
Joe Chance, at Barrie you are not allowed to deck the block. you can clean up the head, but no excessive shaving is allowed!

  OK lets get this strait first . This is just a discussion anything thats said may or may not be legal at your track . Consult your rules or your clergy for absolution .

 240racer  . Nissan makes very good pistons to start with but heres the ones you
want or dont want as the case maybe .

 
Technical Information
Compression Ratio Change for 1989-90 S13's

According to Nissan Technical Bulletin TS89-072:

KA24E ENGINE CHANGE

APPLIED MODEL: 1989 240SX (S13) from engine number KA24-012039*

SERVICE INFORMATION

To improve driveability the KA24E engine on the applied model has been changed as follows:
Compression ratio has been changed (9.1 to 8.6).
Air temperature sensor has been added.
E.C.U. has been changed.
Idle speed.
Self-diagnosis for E.G.R.
*Vehicles with an Air Temperature Sensor on the air cleaner box have the
.modified engine.

 
  Check under #3 cyl below plug for your #
  Make sure you use a metal head gasket when you put it back together.

  Here are some of the best pistons and other goodies for your KA24 if you have the $
      http://www.venolia.com/main.html
     http://www.240sxmotoring.com/coroforka.html

 

Linkback: https://www.canadianracingonline.com/smf/index.php?topic=6908.msg35808#msg35808
« Last Edit: October 29, 2007, 05:03:58 PM by JoeChance »
Logged

Offline hill3

  • Series Owner
  • *****
  • Posts: 707
Re: Mini Stock Rules
« Reply #7 on: October 29, 2007, 05:33:09 PM »
joe you are scary with your wealth of info.

Linkback: https://www.canadianracingonline.com/smf/index.php?topic=6908.msg35809#msg35809
Logged
THIS IS SPARTA!!!!!      -PARA TODA MI VIDA-

Offline Thayne

  • Series Owner
  • *****
  • Posts: 3465
Re: Mini Stock Rules
« Reply #8 on: October 29, 2007, 06:03:21 PM »
Quote from: hill3 on October 29, 2007, 05:33:09 PM
joe you are scary with your wealth of info.

yea i know. He should build a mini. I bet that thing would be a lil rocket.

Linkback: https://www.canadianracingonline.com/smf/index.php?topic=6908.msg35810#msg35810
Logged

Offline hill3

  • Series Owner
  • *****
  • Posts: 707
Re: Mini Stock Rules
« Reply #9 on: October 29, 2007, 06:04:00 PM »
Logged
THIS IS SPARTA!!!!!      -PARA TODA MI VIDA-

Offline Kahnefreak

  • Melson Mafia
  • Series Owner
  • *****
  • Posts: 1584
  • Melson Racing
    • http://www.piczo.com/gpsracing
Re: Mini Stock Rules
« Reply #10 on: October 29, 2007, 07:26:29 PM »
Quote
OK lets get this strait first . This is just a discussion anything thats said may or may not be legal at your track . Consult your rules or your clergy for absolution .


Sorry Joe, Thought you were referring to just Sunset and Barrie only. my apologies

Linkback: https://www.canadianracingonline.com/smf/index.php?topic=6908.msg35813#msg35813
Logged
"2nd place is just the first loser"

Offline 240racer

  • Series Owner
  • *****
  • Posts: 283
Re: Mini Stock Rules
« Reply #11 on: October 29, 2007, 10:02:35 PM »
wow ...you sure do know alot, or are good at researching.....that kind of stuff would start to burn a hole in my pocket  lol...i could probably think of a 100 questions to picik your mind with lol.....#1, how do i know if my motors the 9.1 or 8.6 ratio.. :)

Linkback: https://www.canadianracingonline.com/smf/index.php?topic=6908.msg35827#msg35827
Logged

Offline JoeChance

  • Car Owner
  • ****
  • Posts: 138
Re: Mini Stock Rules
« Reply #12 on: October 30, 2007, 10:13:15 AM »
 About 15 years ago i went to the SCCA run offs in Daytona . I was amazed at how much HP the 4 cylinders made and how many RPM they were turning . I have been playing with Nissan Honda and Mitsubishi's since then .

 240racer reread my previous post to determine which engine you have , but heres the two main things .
  Cars with an Air Temperature Sensor on the air cleaner box have the
 8.6 to 1 engine.
 If your engine has a serial # higher then KA24-012039 it is a 8.6 to 1 engine

   One of the biggist problems i see the 240 guys having is gearing and there is no reason for it since there are lots of gears available for your car .
   All 240s have a R200 rear end with a 4.08 gear in them . Heres a list of other Nissan gears from other models that will fit your car .

    http://nico.dreamhosters.com/hosting/nissan_gear_ratios.xls

    Here are some others

Z33 - MT - R200 - 3.538
Z33 - MT - R200V - 3.538
Z33 - AT - R200V - 3.357
Z32TT - R230V - 3.692
Z32 - R200V - 4.083
G35 - Sedan - AT - R200 - 3.357
G35 - Sedan - MT - R200V - 3.538
G35 - Sedan - AWD - AT - R200 - 3.357
G35 - Coupe - MT - R200V - 3.538
G35 - Coupe - AT - R200 - 3.357
G35 - Coupe - AT - R200V - 3.357
Q45 - G50 - R200V - 3.538
Q45 - FY33 - R200V - 3.692
R32 GTR - RB26DETT - MT - F160 - 4.111 - (Front Final Gear)
R32 GTR - RB26DETT - MT - R200 (Mechanical LSD) - 4.111
S15 - MT - R200H - 3.692
S15 - AT - R200V - 3.916
S14 - KA24DE - 4.083
S14 - SR20DET - MT - R200V - 3.692
S14 - SR20DET - AT - R200V - 3.915
S13 - KA24DE - 4.083 - (Both R200 and R200V)

  There are also at lest 4 truck transmissions with different ratios available that will bolt right up to your engine . Using all the combinations with transmissions and crown and pinions you have over 20 gear ratios available to you which is allot more then even the Ford guys have .  Next get rid of that two piece drive shaft you have . Cut the ends off and have a one piece shaft made at your local drive line shop . Tell them to build it as light as possible since they are use to building them for 4x4 trucks and V8 cars they tend to over build them (too heavy)



   

 

Linkback: https://www.canadianracingonline.com/smf/index.php?topic=6908.msg35836#msg35836
« Last Edit: October 30, 2007, 01:04:09 PM by JoeChance »
Logged

Offline JoeChance

  • Car Owner
  • ****
  • Posts: 138
Re: Mini Stock Rules
« Reply #13 on: October 30, 2007, 03:36:42 PM »
Slammer how tight do you turn that Honda ? 7500 with an si gear box in 2nd ?

Linkback: https://www.canadianracingonline.com/smf/index.php?topic=6908.msg35850#msg35850
Logged

Offline 240racer

  • Series Owner
  • *****
  • Posts: 283
Re: Mini Stock Rules
« Reply #14 on: October 30, 2007, 04:26:31 PM »
i have researched all of those different rear ends at the wreckers and stuff but none of them look like they bolt right in. and they seem to have different pinion lengths..besides i dont even think they'd be legal because they never came in an s13..and i have thought about getting a one peice drive shaft but at the same time thats not stock either so im not sure what tech would say...the 2 piece is definatly a disadvantage and its weighs a ton...but if my car was any faster i would just get weight added anyway lol...the biggest problem is the handling..it was pretty dialed until it got into the wall the last time and it hasent been the same. next year its getting a whole new k-frame and basically everything behind it including new frame rails, floor and quarter panels...and Matt ill think about that rear end and get back to ya on it if im interested...might be good for invitationals...thanx guys

Linkback: https://www.canadianracingonline.com/smf/index.php?topic=6908.msg35854#msg35854
Logged
Pages: [1] 2 3
« previous next »
 

HTML ezBlock
site stats
Powered by EzPortal