VR Senator with LSx454

[GMH-304Participant Top End82 VH SL, 86 VL SL, 99 VS SS Ute View build HERE Member since: March 13, 2015 Posts: 39]

VRSenator065 wrote:

Not sure, wouldn’t the extra traction be more use? I have no idea what sort of mph it may run. I would be happier with it not quite pulling 7k at the line than hitting the limiter just before?

How much hp are you hoping to make and what does the car weigh (in pounds). Should be able to roughly calculate mph and from that can work out the best tyre diameter/rear gear combo.

• This reply was modified 7 years, 1 month ago by  GMH-304.

[VRSenator065Participant Adelaide SAVR Senator LSx454 1960 Kombi (project) 1921 Nash Hot Rod (future project) View build HERE Member since: February 17, 2015 Posts: 5 777]

Never had it a weigh bridge, I am going to take a guess at say 1550kg, so I think that’s around 3400lb.  Power  aiming at 700ish hp fly.  Diff is 3.55:1, glide so no overdrive.  I have played around and different calculators seem to give different results, not sure what the best calculator is?

[GMH-304Participant Top End82 VH SL, 86 VL SL, 99 VS SS Ute View build HERE Member since: March 13, 2015 Posts: 39]

Yeah they’re not a 100%, but they give you a pretty fair idea. I use the calculators on wallaceracing.com, very helpful.

With the 3.55 gears and a 275/50 15 (26.4in) it’ll cross the line somewhere around 6100rpm and for very inch in diameter more it’ll drop 200rpm.

[cava454Moderator 93 VR BT1 View build HERE Member since: February 20, 2015 Posts: 2 390]

Smaller tire will be better off the line also.

 

I rkeon you will be around 1600-1650kg

[VRSenator065Participant Adelaide SAVR Senator LSx454 1960 Kombi (project) 1921 Nash Hot Rod (future project) View build HERE Member since: February 17, 2015 Posts: 5 777]

Wow, that heavy?   I seem to remember IJ saying his was just over 1500 and its AWD?  Appreciate I have a cast iron block, and heavier diff, but that a lot isn’t it?  I guess I will need to weigh it at some stage.  According to the web a VR V8 came in at 1477kg?

[cava454Moderator 93 VR BT1 View build HERE Member since: February 20, 2015 Posts: 2 390]

Mine was 1600 with me in it. Ian’s is stripped out don’t forget, while the does have extra in the driveline.

[N3VA3HParticipant WAVN CALAIS View build HERE Member since: February 26, 2017 Posts: 16]

Wallace Racing Calc FTW!
1630kgs ish with you in it.

7000rpm, 126mph, 27″ tire = 3.55:1

http://www.wallaceracing.com/calc-gear-tire-rpm-mph.php

Lots of other ways to work it out too on their site.

Have fun!

 

• This reply was modified 7 years, 1 month ago by  N3VA3H.
• This reply was modified 7 years, 1 month ago by  N3VA3H.

[VRSenator065Participant Adelaide SAVR Senator LSx454 1960 Kombi (project) 1921 Nash Hot Rod (future project) View build HERE Member since: February 17, 2015 Posts: 5 777]

Good stuff, so looks like the 275/50/15 at 26.4″ is a pretty good bet.  And will theoretically have me crossing the line at around 6200rpm.  I am not trying to break a record, I reckon that works.  I am guessing it all depends on traction/set up anyway.  Last time I went down a drag strip was 30 years ago in my little LC GTR and ran 15.2

[GMH-304Participant Top End82 VH SL, 86 VL SL, 99 VS SS Ute View build HERE Member since: March 13, 2015 Posts: 39]

Have you thought about bolting a Gear Vendors unit behind the glide at any stage?

 

[VRSenator065Participant Adelaide SAVR Senator LSx454 1960 Kombi (project) 1921 Nash Hot Rod (future project) View build HERE Member since: February 17, 2015 Posts: 5 777]

Yea for sure it might happen one day.  But really it’s not about cruising at 110.

[cava454Moderator 93 VR BT1 View build HERE Member since: February 20, 2015 Posts: 2 390]

<p style=”text-align: left;”>With 3.55 a rear, a gear vendors probable isn’t really needed. Not like it’s 4.11 and cruising @100 on 3700</p>

[VRSenator065Participant Adelaide SAVR Senator LSx454 1960 Kombi (project) 1921 Nash Hot Rod (future project) View build HERE Member since: February 17, 2015 Posts: 5 777]

Yea your right Cav, it’s actually not bad at 100.

[Anonymous View build HERE Member since: January 1, 1970 Posts: 0]

Mine was 1553 wet when I first built it but things have changed a bit so I need to reweigh it.

[VRSenator065Participant Adelaide SAVR Senator LSx454 1960 Kombi (project) 1921 Nash Hot Rod (future project) View build HERE Member since: February 17, 2015 Posts: 5 777]

And is that with the cage as well as all the AWD stuff?  And with you in it?

[Anonymous View build HERE Member since: January 1, 1970 Posts: 0]

All up without me.

[VRSenator065Participant Adelaide SAVR Senator LSx454 1960 Kombi (project) 1921 Nash Hot Rod (future project) View build HERE Member since: February 17, 2015 Posts: 5 777]

Sounds like Cav’s guess may be pretty close to the mark then with my lard ass in it!!  Once its all up and running might swing past the local weighbridge so I know once and for all.  Thanks all.

[Anonymous View build HERE Member since: January 1, 1970 Posts: 0]

Yeah I’d say he’ll be close for sure… keep in mind mine had no interior heater or AC, 0 deadener or creature comforts..

[VRSenator065Participant Adelaide SAVR Senator LSx454 1960 Kombi (project) 1921 Nash Hot Rod (future project) View build HERE Member since: February 17, 2015 Posts: 5 777]

Yea but them sure I have cast iron block, and bigger diff, but to transfer case, front diff, or cage, be similar I am guessing.

[cava454Moderator 93 VR BT1 View build HERE Member since: February 20, 2015 Posts: 2 390]

I was 1600 on the dot.

304, light weight trimatic, no AC or heater etc. and I’m 80kg. Sorry. I was lol.

• This reply was modified 7 years, 1 month ago by  cava454.

[ImmortalityParticipant 97 HSV Senator 185i 02 VX L67 Calais View build HERE Member since: August 31, 2015 Posts: 535]

A Senator starts out heavier than an SS.

I would suggest the Senator was a chubby 1600kg+ before any mods were undertaken.

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