Gday all, intend on running my nc lj racer down the quarter before dragseason ends. Being historic Circuit race car its running quick 202 webers, m21 4 speed, 205/13 and 3.55 diff. I intend on trying get few other historic cars down there for a giggle, so for bragging rights.... What diff ratio should I be running and what tyres?
Cheers
lj 202 ratio?
Started by
_datpsi_
, Jan 07 2014 10:10 AM
15 replies to this topic
#2
Ice
-
- Members
-
- 15,127 posts
Cool
- Name:Gene
- Location:Galaxy's away from Ipswich
- Car:77 HZ Sandman Van
- Joined: 03-January 07
Posted 07 January 2014 - 04:42 PM
3.55 should be ok some slicks would be the go
#3
_datpsi_
_datpsi_
-
- Guests
Posted 07 January 2014 - 10:22 PM
Cheers. . I thought the 3.55 might be ok. I don't think my semi slicks will cut it.? Was thinking street radials rather than outlay decent coin for slicks. Would assume front runners needed then too?
genuinely curious to what the old girl Can do
Cheers
genuinely curious to what the old girl Can do
Cheers
Edited by datpsi, 07 January 2014 - 10:23 PM.
#4
Ice
-
- Members
-
- 15,127 posts
Cool
- Name:Gene
- Location:Galaxy's away from Ipswich
- Car:77 HZ Sandman Van
- Joined: 03-January 07
Posted 07 January 2014 - 10:27 PM
Mate ran his lj torana down there 208 vk injected supercharged first pass ever did a 12.5 flat
But he has 9inch with 3.9 lsd
But he has 9inch with 3.9 lsd
#5
dattoman
-
- Administrators
-
- 16,472 posts
Do I feel lucky? Well, do ya, punk?
- Name:Neil
- Location:Perth Western Australia
- Car:LX SS , 76 Cadillac , 3 x dattos
- Joined: 04-February 07
Posted 07 January 2014 - 10:34 PM
Depends on tyre size
I used to run 3.9's in mine
As for front runners... if your running radial rears you should stick with radial fronts
If your running rags on the back... same on the front
However probably not needed unless you think your in the 11 second or faster bracket... even then not mandatory
#6
_datpsi_
_datpsi_
-
- Guests
Posted 07 January 2014 - 11:54 PM
Nowhere near the 11s.. rekon the power to weight should see high 12s but just comparing to old datto i used to run. Was hoping run radials rear and semi slick fronts.. cheaper alternative but u boys know best
Being a historic only running 205 60 13 atm..
Being a historic only running 205 60 13 atm..
#7
Ice
-
- Members
-
- 15,127 posts
Cool
- Name:Gene
- Location:Galaxy's away from Ipswich
- Car:77 HZ Sandman Van
- Joined: 03-January 07
Posted 08 January 2014 - 12:02 AM
Semi slicks would be better than radials you would think
On the back i mean
On the back i mean
#8
Redzone
-
- Members
-
- 517 posts
Forum Fixture
- Name:Dave
- Location:Sunshine Coast
- Car:Mini torana's - Gemini coupe 10.787@123mph, log booked Group A DOHC Gemini under resto..
- Joined: 02-November 10
Posted 08 January 2014 - 12:11 AM
Et street radials would be the go, they do a 215/60/14 I'm pretty sure!
#9
Redzone
-
- Members
-
- 517 posts
Forum Fixture
- Name:Dave
- Location:Sunshine Coast
- Car:Mini torana's - Gemini coupe 10.787@123mph, log booked Group A DOHC Gemini under resto..
- Joined: 02-November 10
Posted 08 January 2014 - 12:15 AM
Ps I ran my old carby turbo gem to 13.5's running an advan 032r semi slick, 205/60/13, dropped em down to 12psi & it did 1.80 60 footers, so yeah semi's can work. You have to get them mega warm though, big skids!
#10
warrenm
View Garage
-
- Members
-
- 2,107 posts
Forum Fixture
- Location:Central West NSW
- Car:1972 LJ Torana
- Joined: 08-November 05
View Garage
Posted 08 January 2014 - 07:58 AM
3.55 gears should get you crossing the line just short of 6000rpm(I imagine that the engine would be able to rev harder), so 3.9 gears would be better if you have them, otherwise "run what you brung" & have fun. Remember to pump the fronts up hard if you haven't got any skinny tyres.
#11
_datpsi_
_datpsi_
-
- Guests
Posted 08 January 2014 - 10:20 AM
Awesome guys cheers... Yeah the engine can rev but I usually change at 6500 anyways. As for the semi slicks we had dramas trying to get them to grip years ago in my brothers escort. Maybe smaller Window of performance? so even if I run the semis all round pump fronts right up?
Maybe we'll be able give couple the v8s some trouble
Cheers
Maybe we'll be able give couple the v8s some trouble
Cheers
#12
warrenm
View Garage
-
- Members
-
- 2,107 posts
Forum Fixture
- Location:Central West NSW
- Car:1972 LJ Torana
- Joined: 08-November 05
View Garage
Posted 08 January 2014 - 05:12 PM
Yes, pump the fronts up hard, you don't want them to slow you down.
#13
rodomo
-
- Members
-
- 17,999 posts
To advertise here, call 13TORANA
- Name:R - O - B Dammit!
- Location:Way out west of Melbourne Awstraylya
- Joined: 10-December 05
Posted 08 January 2014 - 08:32 PM
I found semi slicks hard to burn off the line. I had Nolethane rear end but. It just wanted to hop away.
#14
_datpsi_
_datpsi_
-
- Guests
Posted 08 January 2014 - 08:54 PM
wasn't aware of pumping the front but certainly makes sense. Car is roughly 1150kg,4so m21, should be roughly 230hp minimum at rears... 12s do-able?
#15
warrenm
View Garage
-
- Members
-
- 2,107 posts
Forum Fixture
- Location:Central West NSW
- Car:1972 LJ Torana
- Joined: 08-November 05
View Garage
Posted 09 January 2014 - 07:53 AM
My LJ is 1202kg, with me in it, so if you can get the traction off the line, 12s are doable. 
0 user(s) are reading this topic
0 members, 0 guests, 0 anonymous users
