Vishnu goes to the drag strip
Dec 27, 2003, 05:41 PM
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Vishnu goes to the drag strip
I took my brother and his 2 yr old nephew to Sacremento Raceway today. The hotshoe I had lined up to drive the car at the strip couldn't come so, with much deliberation, I decided to take a go at it myself. The first and last time I went to a drag strip was back in 94 with a supercharged Miata (13.8@102mph... yeah!) Today, I ended up getting two reasonably clean runs in during the afternoon. I don't really know how to read the timeslips so here the are:
Run #1
Reaction 1.216
I1 2.576
I2 6.163
I3 8.774
MHP (I3) 94.439
I4 10.962
E.T. 12.795
MPH 122.020
Run #2
Reaction 1.372
I1 1.963
I2 5.155
I3 7.682
MHP (I3) 97.397
I4 9.816
E.T. 11.631
MPH 121.551
The difference between the run #1 and #2, in terms of tuning, was that the 1st run ran a lower boost mode since I was having a heck of a time keeping all four tires from lighting up in 2nd gear. For a launch, all I did was a casual street start with no clutch slippage or dumping. Basically the way your mom would drive the car. I crossed the traps bouncing off the rev limiter in 4th gear.
After everyone laughed at my 60' times (2.576s, which is appearantly pretty terrible) and launching technique, I went for the 2nd run with a bit more gusto. Raised boost to normal levels. Revved up to 5000rpm and tried to ride the clutch during take-off. And take off, it did. This time, all four RA1 race tires immediately broke loose, smacking the engine against the 7750rpm rev limiter. Shifted into 2nd and the car broke traction again. Sixty foot time fell to a merely bad 1.963. Into third and the car leaned back and got down to business. Unfortunately, at least a second of the run was spent bapping against the 4th gear rev limiter as I crossed the traps
Appearantly, there is a lot of room for improvement. Looking back at the results, I picked up 3mph at the 1/8th mile in the second run, yet still was only rev limited by the end of the 1/4 to the same 121-122mph I had in the 1st run. With a bit higher gearing (through larger rolling diamter tires) and/or a higher rev limit, that extra 3mph (plus some) could stay with me to the end of the run, potentially allowing me to trap in the 125-126mph range. Or at least that is what the drag racers at the track suggested. Oh well, coulda shoulda woulda. Maybe next time.
Oh yeah, the car is running a completely stock never-openend block (not even the head studs or rod bolts have been upgraded), stock heads (no porting, stock springs, stock valves, etc,) 272/272 cams, cam gears, Stage 2 turbo system, 680cc injectors, fuel pump and full non-sig exhaust. Basically a 100% stock engine with simple bolt ons.
Car was run on c16 race gas on the XEDE's race gas map. Car was also running a stock airbox with stock filter (a bit dirty but good enough I guess). Engine has 24,000 miles on the odometer and 3745 pulls on the dyno. It has competed in 6 days of hard magazine tests. Several track events. Doesn't drink oil and lays down the smack when asked.
Cheers,
shiv
I have a video as well as some pics of the "tracked prepped" car, complete with child seat in the back and the number "506" painted with shoe polish on the window
I'll post 'em up on Monday if anyone wants to see them.
It was a good day and got to hang out with friends and meet a few nice fellow EVO owners. But still, I can't believe that people live for this stuff. Driving 3 hours round-trip, waiting for several hours during the day and getting less than 30 seconds of "track" time is a monumental waste of a day. And where are the turns??!?! And the ladies??!
Run #1
Reaction 1.216
I1 2.576
I2 6.163
I3 8.774
MHP (I3) 94.439
I4 10.962
E.T. 12.795
MPH 122.020
Run #2
Reaction 1.372
I1 1.963
I2 5.155
I3 7.682
MHP (I3) 97.397
I4 9.816
E.T. 11.631
MPH 121.551
The difference between the run #1 and #2, in terms of tuning, was that the 1st run ran a lower boost mode since I was having a heck of a time keeping all four tires from lighting up in 2nd gear. For a launch, all I did was a casual street start with no clutch slippage or dumping. Basically the way your mom would drive the car. I crossed the traps bouncing off the rev limiter in 4th gear.
After everyone laughed at my 60' times (2.576s, which is appearantly pretty terrible) and launching technique, I went for the 2nd run with a bit more gusto. Raised boost to normal levels. Revved up to 5000rpm and tried to ride the clutch during take-off. And take off, it did. This time, all four RA1 race tires immediately broke loose, smacking the engine against the 7750rpm rev limiter. Shifted into 2nd and the car broke traction again. Sixty foot time fell to a merely bad 1.963. Into third and the car leaned back and got down to business. Unfortunately, at least a second of the run was spent bapping against the 4th gear rev limiter as I crossed the traps
Appearantly, there is a lot of room for improvement. Looking back at the results, I picked up 3mph at the 1/8th mile in the second run, yet still was only rev limited by the end of the 1/4 to the same 121-122mph I had in the 1st run. With a bit higher gearing (through larger rolling diamter tires) and/or a higher rev limit, that extra 3mph (plus some) could stay with me to the end of the run, potentially allowing me to trap in the 125-126mph range. Or at least that is what the drag racers at the track suggested. Oh well, coulda shoulda woulda. Maybe next time.
Oh yeah, the car is running a completely stock never-openend block (not even the head studs or rod bolts have been upgraded), stock heads (no porting, stock springs, stock valves, etc,) 272/272 cams, cam gears, Stage 2 turbo system, 680cc injectors, fuel pump and full non-sig exhaust. Basically a 100% stock engine with simple bolt ons.
Car was run on c16 race gas on the XEDE's race gas map. Car was also running a stock airbox with stock filter (a bit dirty but good enough I guess). Engine has 24,000 miles on the odometer and 3745 pulls on the dyno. It has competed in 6 days of hard magazine tests. Several track events. Doesn't drink oil and lays down the smack when asked.
Cheers,
shiv
I have a video as well as some pics of the "tracked prepped" car, complete with child seat in the back and the number "506" painted with shoe polish on the window
I'll post 'em up on Monday if anyone wants to see them. It was a good day and got to hang out with friends and meet a few nice fellow EVO owners. But still, I can't believe that people live for this stuff. Driving 3 hours round-trip, waiting for several hours during the day and getting less than 30 seconds of "track" time is a monumental waste of a day. And where are the turns??!?! And the ladies??!
Last edited by shiv@vishnu; Dec 27, 2003 at 07:05 PM.
Dec 27, 2003, 05:49 PM
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Re: Vishnu goes to the drag strip
Originally posted by shiv@vishnu
I have a video as well as some pics of the "tracked prepped" car
I have a video as well as some pics of the "tracked prepped" car
POST
VID
PLEASE
BTW that MPH is mighty big! Good tooning!
Jason
Dec 27, 2003, 06:45 PM
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Shiv, Just shift to fifth for the love of God! It would have given a few more mph and lowered your et by a tenth or two. Nice job, so much for Vishnu cars having no drag cred!!
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Next year once you get that kit down I will order it.
Dec 27, 2003, 07:25 PM
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Originally posted by shiv@vishnu
Chronohunter a dragger? If you only knew...
Chronohunter a dragger? If you only knew...
i want you to return your karting license ASAP! Trator. umm i cant think of anything else.
oh yeah we made it back home with a avarage of 22-24 MPG doing 90-120 the whole time. thanks
Tom
