RWKW's and 1/4 mile times

[pro74]

Hi all , we just ran my mates car on the dyno today as we are setting up the tune to take it for a fews runs and the track.

The car is a VN BT1
LS1 , GTS 6 speed manual, 9 inch 3.5 ratio spooled, mini tubbed, full steel and trim. The car made 312 RWKW's.

Just curious on what weight and KW's cars are running as opposed to 1/4 mile times .

Any feedback would be great .

Cheers

[mcdeath]

mmm hard to say but i would guess a mid to high 11 the solid rear end will make all the difference compared to a irs. Mines 352rwkws 4.11 spool i have only managed a 12.06 so far but im spastic with a manual lol and stil trying to sort out my suspension. Is it running 90/10s ? good luck with it and have some fun :)

[Quadcams]

I know of a mate with a ls1 which had 312rwkw and was a manual, did a 11.8@116, cant remeber which model but was full weight.

[CarlFST60L]

Unfortunately there are to many variables to tell you.

Anywhere from 10.X to 12.X @ 11X - 12X mph.

Best take a trip to your local drag strip :cheers:

[STATIE]

A VN with 315RWKW:eek: should be a fun ride

Some decent tyres/setup and somewhere in the 10-11 second range should be possible.

[MYTO8]

If you cant drive and cant get traction could run a 14 who knows. I have guys come and ask that very question i want 300rwkw so i can run low 11's sound great in theroy one customer springs to mind with a skyline i built makes little over 300kwatw and hasnt cracked a 12 yet due to new to drags and has runs std street tyres with traction problems. but only .2 quicker then his friends stocker. Best thingto do like said above go to drags run it and you will know the answer.

[T_Kiwi]

This will completly stump you, i have 380rwkw 1830kg 10.5@141mph with low boost and wheelspin

[LSX-438]

Here is a little chart that is reasonably acurate (for vt~vz) anyway

http://farm3.static.flickr.com/2241/2177968844_c7348e637b_o.jpg

[pro74]

Thanks for all the info guys, I understand all the factors with the set up of the car and the driver at the end of the day . I was just after a few examples of what to expect as i know RWKW's dont mean squat if you cant drive or get power to the ground.

Another example is my HQ Monaro full steel, full street with slicks made 275 RWKW's and ran a best of 10.99 @ 123mph with consistent 11.0's on pump fuel.

Im not usually big on chassis dyno sheets and so fourth, just real track power and time slips

Cheers

[hogs]

G'Day,

That chart is interesting to say the least.

Whoever posted it from RUSSO'S could you please tell me what has been done to the car that ran 117 mph with 225 rwkw's if possible.

Cheers,

Hogs,:)

[LSX-438]

G'Day,

That chart is interesting to say the least.

Whoever posted it from RUSSO'S could you please tell me what has been done to the car that ran 117 mph with 225 rwkw's if possible.

Cheers,

Hogs,:)

Hi Hogs

See item 5 here:

http://www.ls1.com.au/forum/timeslips.php?&do=username

That one looks like a bit of an outlier, hence the smoothed curve which i have found is pretty close to spot on for a commodore.

Edit: track says "g-tech street use" so perhaps ignore that one..

Here is another chart, chased on ET vs RWKW

http://farm4.static.flickr.com/3274/2592024510_53df6fde9e_o.jpg

[TAKEITEZ]

those two charts are good there...
i run 229rwkw... 12.736pb... between 109 - 111mph depending on who knows what...

[LSX-438]

those two charts are good there...
i run 229rwkw... 12.736pb... between 109 - 111mph depending on who knows what...

The MPH vs RWKW i have found particularly good. You should be targeting the MPH on the curve for your power.

[pro74]

A VN with 315RWKW:eek: should be a fun ride

Some decent tyres/setup and somewhere in the 10-11 second range should be possible.

Yeah Statie , it should be a bit of fun. If all goes well tonight with the rear tyre setup i think we will go to heathcote on Sunday, first time out with this setup.

[WLDLS1]

it will be a fun ride and all going good i would say a 11 something pass. im still amazed why people call there cars BT1. BT1 is a susspension code used by GMH for the police force.. FE2 is code for springs an shocks as a option.. BT1 is the package.

http://members.westnet.com.au/scottl/info.htm

BT1 (Police Pack) BT1 Police Pack were issues to police with upgraded suspension.

anyway enjoy the ride.

[TAKEITEZ]

The MPH vs RWKW i have found particularly good. You should be targeting the MPH on the curve for your power.

that just went straight over my head!...... :)

but if i consult the little graphs you posted earlier, i think what you're saying is that my trap speed and ET's are indeed a more truthful indication of rwkw...
my last 229rwkw graph being not the greatest indication of the cars power... with both graphs (mph and et) pointing to approx 250rwkw???

i guess if i really wanted to know i could go for a blat on a dyno... but for now i'm happy with the spread sheet of time slips i'm slowing building...

[VYSLED]

Gday, i had 460rwkw with race weight in at 1600kg in a M6 vy ss turbo ute and i ran a 10.1 @ 140 mph. If i could drive the bloody thing properly apparently 140mph should be a very high 9 second pass. Cheers Naffan

[CarlFST60L]

that just went straight over my head!...... :)

but if i consult the little graphs you posted earlier, i think what you're saying is that my trap speed and ET's are indeed a more truthful indication of rwkw...
my last 229rwkw graph being not the greatest indication of the cars power... with both graphs (mph and et) pointing to approx 250rwkw???

i guess if i really wanted to know i could go for a blat on a dyno... but for now i'm happy with the spread sheet of time slips i'm slowing building...

My read on the graph is rwkw v mph has little to do with ET. ET is far more about 60ft times ;) Even MPH is more linked to ET v 60ft really, i.e. to compare MPH v RWKW you MUST have exactly the same 60 ft times.

[LSX-438]

that just went straight over my head!...... :)

but if i consult the little graphs you posted earlier, i think what you're saying is that my trap speed and ET's are indeed a more truthful indication of rwkw...
my last 229rwkw graph being not the greatest indication of the cars power... with both graphs (mph and et) pointing to approx 250rwkw???

i guess if i really wanted to know i could go for a blat on a dyno... but for now i'm happy with the spread sheet of time slips i'm slowing building...

The charts represent real world results from the LS1 community. I've found them pretty accurate - at least the rwkw vs mph (vs Russo Dyno anyway).

But you can see there is a wide spread of results. There are a bunch of drag racing calculators on the net that give you theoretical (best) results based on a given set of parameters (power, weight, gearing etc). The other thing of late is; there are huge rwkw VE FI commodores getting around (>400rwkw) with rather lackluster track results, which skews the curve i guess.

[CarlFST60L]

The charts represent real world results from the LS1 community. I've found them pretty accurate - at least the rwkw vs mph (vs Russo Dyno anyway).

But you can see there is a wide spread of results. There are a bunch of drag racing calculators on the net that give you theoretical (best) results based on a given set of parameters (power, weight, gearing etc). The other thing of late is; there are huge rwkw VE FI commodores getting around (>400rwkw) with rather lackluster track results, which skews the curve i guess.

The average curve over the top of the results is a great indication, but like you said, there are plenty of cars that defy the curve with much higer and lower MPH than expected. I looked into several of these results, and my conclusion was that there is a variation in car setup, which is easy to sort the men from the boys by using 60ft.

So, then I took the data for cars running 1.5 to 1.599 60ft then graphed rwkw v mph, and the curve was closer to what would be expected, then did the same for 1.6 60ft, then 1.7 60ft, after that it gets a bit messy as the graph contains plenty of people that go for the fun of trying to run high powered cars on street tyres i.e. 400kwrw cars running factory tyres.

So my conclusion from these new graphs of similar 60ft times indicated that MPH v RWKW works great, but, you need to have similar car setups. Even then, weights, dyno variation, gearing, tyres/rims etc still effect the results

[LSX-438]

Carl i tried same/similar; filtering based on decent 60's - results got "better" / more what you'd expect but i dont think we have enough data. I reckon at the end of the day we should (at least) target somewhere close to the curve, at least for MPH ie. 250rwkw 112mph; 300rwkw 117mph; 350rwkw 125mph and 400rwkw close to 130mph. or thereabouts. Assuming decent driving, a pair of M/T's etc. if anyone is less than say 5mph lower than the curve i would suggest something is amiss..

[CarlFST60L]

Carl i tried same/similar; filtering based on decent 60's - results got "better" / more what you'd expect but i dont think we have enough data. I reckon at the end of the day we should (at least) target somewhere close to the curve, at least for MPH ie. 250rwkw 112mph; 300rwkw 117mph; 350rwkw 125mph and 400rwkw close to 130mph. or thereabouts. Assuming decent driving, a pair of M/T's etc. if anyone is less than say 5mph lower than the curve i would suggest something is amiss..

Yeah, agreed :cheers:

[HYMEY]

thats accurate data LSX, Although street tyres and 400rwkw does seem to hurt mph times also. An example of this is the turbo commodore from BTA motorsports which is running low 12s at 122mph. Would u agree with slicks the car is capable of 130mph? considering mph would be much higher at half track with a decent 60 foot.

[Bazz]

Checking those graphs, mine seems to be a bit of a freak.

In the RWKW I have 217rwkw and on average it's about 104mph in the graph but I normally run 109.

Also in the ET vs RWKW, it's about 13.3 ish, but I average around 12.6.

For you to find out what it's gonna run, best off just running it!!! LOL

[LSX-438]

Checking those graphs, mine seems to be a bit of a freak.

In the RWKW I have 217rwkw and on average it's about 104mph in the graph but I normally run 109.

Also in the ET vs RWKW, it's about 13.3 ish, but I average around 12.6.

For you to find out what it's gonna run, best off just running it!!! LOL


With 217rwkw the range is from 100mph to 117mph, a big spread! You can see half of the runs are above the curve with you. It's just a guide for reference, I agree it's best to just run it!


thats accurate data LSX, Although street tyres and 400rwkw does seem to hurt mph times also. An example of this is the turbo commodore from BTA motorsports which is running low 12s at 122mph. Would u agree with slicks the car is capable of 130mph? considering mph would be much higher at half track with a decent 60 foot.

I havent seen many VE's with big power and street tyres run myself, so i dunno sorry. it's just data from the slip database (mostly VY~VZ) so in that case i would expect 400rwkw to run about 130mph yes.