Was i heading for my first 10?
Discussion
Tet said:
To be honest, just taking it to Shakey should get you the extra you need to dip into the 10s...
Ive been to Shakey a few times and always struggled on the startline for traction compared to York.Best ive managed there is 11.8 and 1.88 to 60 foot but i must admit i wasnt warming the MTs enough at the time.
crikey said:
To be running a 10 you need to be running mid to low 6's at the 8th.
Not so if you have the power top end.There are 2 TVRs i know that run quicker than me.
One is a Sagaris with an LS7 that has rum 11.1 @ 129 and 7.1 to the 1/8th with about 550 bhp and the other is a Cerbera with a tuned LS3 that runs 10.7 @ 133 with only 7.0 to the 1/8th @ 102 with about 530bhp @ wheels. The Cerb runs the same MT street ETs as myself and managed a 1.62 at Shakey on the 10.7 run.
All these cars are on street suspension with IRS. Going by terminal speeds alone we should all be running much faster ETs if we had decent drag set ups but its not going to happen. These cars are used everyday on the road, cruises and are abused on circuits also.
dbv8 said:
crikey said:
To be running a 10 you need to be running mid to low 6's at the 8th.
Not so if you have the power top end.There are 2 TVRs i know that run quicker than me.
One is a Sagaris with an LS7 that has rum 11.1 @ 129 and 7.1 to the 1/8th with about 550 bhp and the other is a Cerbera with a tuned LS3 that runs 10.7 @ 133 with only 7.0 to the 1/8th @ 102 with about 530bhp @ wheels. The Cerb runs the same MT street ETs as myself and managed a 1.62 at Shakey on the 10.7 run.
All these cars are on street suspension with IRS. Going by terminal speeds alone we should all be running much faster ETs if we had decent drag set ups but its not going to happen. These cars are used everyday on the road, cruises and are abused on circuits also.
37chevy said:
I always ran 3 tenths quicker at shakey over the pod too, don't know if its slightly down hill or there was a tail wind tho!
The extra glue probably pulled the motor down.crikey said:
Sorry, I was thinking of a 10.0 as opposed to getting into the 10s.
Blimey, is that an apology I see? 
Generally, you would have to run at least high 6.90's to break into the 10's but given your high terminal speed, you could possibly do it, if you ran a very low 7. Unfortunately your 60ft is pretty slow but your 1/4 mile speed is mid 10's in the right car. I personally think you are still a little short.
JMHO Mick
JMHO Mick
moparmick said:
Generally, you would have to run at least high 6.90's to break into the 10's but given your high terminal speed, you could possibly do it, if you ran a very low 7. Unfortunately your 60ft is pretty slow but your 1/4 mile speed is mid 10's in the right car. I personally think you are still a little short.
JMHO Mick
Thats kind of where i think i am. JMHO Mick
A dip into the 1.6's to 60 foot and a tweak on the nitrous settings and activation points will hopefully take 2 tenths off my 1/8th to 7.1 @ 100+, the second 1/8 will be around 3.9 so its very close.
This is only on a 2 stage nitrous system with about 70 bhp on full throttle and 60 bhp on a pushbutton. A bit more control or just a little more gas should do the trick I hope.
Just to add... the car runs 12.4 @ 111 without gas... 275bhp @ wheels NA.
dbv8 said:
PanzerCommander said:
Oh and FYI there is less roll out in the RH lane at york I always dial ~.07 slower in the RH lane
No way? Really. I am gonna measure it next meet.I do understand about shallow staging for ETs so that helps cheers
Matt, your mentor will not be proud of you!
NitroWars said:
Fancy that! Someone giving one of their secrets away so that the opposition has an equal "edge"...
Matt, your mentor will not be proud of you!
Matt, your mentor will not be proud of you!
JimHe'll be fine I think most of the bracket racers know anyway
dbv8 said:
The left lane is obviously favoured by the racers at York. There is always talk of better grip for them in that lane. For most of the RWYB and street types like myself I dont see a difference.
In fact most of my best runs have been in the right lane.
Yep, when given lane choice most go straight for the LH lane, I have certainly run all my best ET's in that lane In fact most of my best runs have been in the right lane.
Oi Moxon... Shush! They'll be talking about you again.
What Matt says about York appears to be the only explanation to me Derek. I've spent hours looking at Matt's runs and the timing data to put together a dial-in calculator for him. We know that the difference between E/T's between the two lanes is pretty much a constant when the car runs its optimum 60ft times and stays a constant time difference all the way down the track. If it is that one lane has significantly better traction than the other then the time differences would be amplified as the car moved down the track, but I'm pretty sure that its not. It is also noticeable that Matt's average R/T in the right lane is just about the same amount quicker as his E/T is slower and so I averaged the two to calculate his "York Raceway - Right Lane Correction Factor". Obviously as the rollout is a distance variable rather than a time variable I can't tell you the time difference for your car or any other, but I can tell you that we add 0.0672 to predicted E/T's in the right lane based on a 2.12 left lane 60ft.
So why is this? The only thing I can think from looking at the track is that there could be a slight dip in the surface in the left lane and a slight crown in the right meaning the chord across the tyre is possibly longer in the left lane allowing the car to remain in the stage beam longer.
What Matt says about York appears to be the only explanation to me Derek. I've spent hours looking at Matt's runs and the timing data to put together a dial-in calculator for him. We know that the difference between E/T's between the two lanes is pretty much a constant when the car runs its optimum 60ft times and stays a constant time difference all the way down the track. If it is that one lane has significantly better traction than the other then the time differences would be amplified as the car moved down the track, but I'm pretty sure that its not. It is also noticeable that Matt's average R/T in the right lane is just about the same amount quicker as his E/T is slower and so I averaged the two to calculate his "York Raceway - Right Lane Correction Factor". Obviously as the rollout is a distance variable rather than a time variable I can't tell you the time difference for your car or any other, but I can tell you that we add 0.0672 to predicted E/T's in the right lane based on a 2.12 left lane 60ft.
So why is this? The only thing I can think from looking at the track is that there could be a slight dip in the surface in the left lane and a slight crown in the right meaning the chord across the tyre is possibly longer in the left lane allowing the car to remain in the stage beam longer.
Edited by TheMighty on Sunday 7th October 04:11
If the theory of a dip and a crown is correct, it would simply depend on where the top and bottom of those are in relation to the positioning of the car on the start line as to how much effect there was. The shell grip surface is probably higher than the concrete of the main startline, but obviously would be higher at each side of the tree negating any effect it would have side to side unless we are interested in the effect between cars running heads up, one off the shell grip and one off the concrete. Obviously the quicker a car leaves, the quicker it covers the rollout distance and as such the smaller the noticeable time difference between lanes if it really does exist (which I'm 100% sure it does). There's not that many truly consistent slower cars at York. The consistent cars tend to be quicker and so the time difference between lanes for them is much smaller and I imagine that the immediate reaction to it is the the car just 60fts better in the left lane and so it must have better traction.
Be interesting to have Crikey's thoughts on the subject...
We were told to watch out for a difference in rollout by someone who probably has more laps in at York than anyone else and it has probably been the most useful little titbit of info we have had in analysing the data and predicting dial-ins which has now won Matt 2 of the 4 rounds of A/SS he has entered and gained him a number 1 and two number 2 qualifiers which can't be bad for a true daily driver on 18" wheels with street tyres.
Be interesting to have Crikey's thoughts on the subject...
We were told to watch out for a difference in rollout by someone who probably has more laps in at York than anyone else and it has probably been the most useful little titbit of info we have had in analysing the data and predicting dial-ins which has now won Matt 2 of the 4 rounds of A/SS he has entered and gained him a number 1 and two number 2 qualifiers which can't be bad for a true daily driver on 18" wheels with street tyres.
I don't think anyone needs me to tell them that the longer you're in stage the better your ET will be because you're getting a rolling start, albeit only inches. It usually stands out as the 60ft gives it away as has been mentioned by others.
The rollout can of course be adjusted, and indeed it is checked every morning of an event at SPR. I don't know why it isn't done at York, maybe they can't adjust it enough with the kit they have or there's some other reason.
The rollout can of course be adjusted, and indeed it is checked every morning of an event at SPR. I don't know why it isn't done at York, maybe they can't adjust it enough with the kit they have or there's some other reason.
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