Vesa

First race with my new engine 2 months ago did not work out well due to original fuel line being too restrictive and the fuel pressure dropped to zero soon after 1/8 mile. Now I fixed that last week with new 10An line and no starvation problems.

My class was only allowed to make 4 passes in last saturdays race. It did not rain, but the humidity was really high and temperature was around 52 fahrenheit. So there was big traction problems and launch rpms where around 1500. I have 3.08 rear, 4yrs old 26x10.5x15 ET Streets, TH400 setup. Total weight is around 3460lbs.

Anyways best ET was 11.705 and best mph 123 and best 60ft 2.0...

What do you say can I hope any improvement next summer (the winter is coming close here soon )

Allthrottleandsomebottle

With traction................11.25 is there

Vesa

That would be a dream day for me

BTW forgot to say the converter is ATI 10" Fuel&Blown unit with 3500+ stall speed.

s383s

You definately have the power to run a low 11.
I would try some new tires.

Vesa

What would you guys recommend? I do have 8" Weld wheels. Which one would give me better results

Part nr 3752 26X10.50-15LT ET Street (similar as my current ones)

or

Part nr 3053 26.0/10.0-15 ET Drag (these might demand wider wheel )

Allthrottleandsomebottle

I would say 3753R P275/50R15 26 X 11.50R15........ ET Street Radial
I am cutting 1.47-1.53 60's all day long on 275/40/17s.............nice and soft and very stable

juicedls6

nice

Vesa

A thread without pics is ?????

Dr.Ron

Nice lookin' car. congrats!

Ron

Allthrottleandsomebottle

Nice pics!
We also have a local guy that races one close to yours.
He runs mid 11s na/mid 10s on the gas............here we are playing:

Allthrottleandsomebottle

Nice pics!
We also have a local guy that races one close to yours except its a few years younger.
He runs high 11s na/mid 10s on the gas............here we are playing:

Vesa

I can see he has tuned the chassis properly for Drag Racing as the front reached sky when he leaves the line and weight moves where it should be = rear tires. I have there plenty to enhance there (550lbs front springs, 7leaf rear spring, 1 1/8 front and 3/4 rear sway bars and stiff shocks - more fsuitable for the road racing )

Allthrottleandsomebottle

I also road race and auto cross mine...........multi pupose car and drive it 700 miles to go race as well
Here's a link to my last road race last month.........160+mph in the straights and hanging with C6Z06s in the twisties are fun in a stroker motor.
http://forums.corvetteforum.com/show....php?t=1756601
Have a good weekend

Vesa

Vesa

Anybody having done tests to verify what the skinny front runners would be giving benefit compared to normal street tires and wheel?

In terms of ET or MPH gain...

My current set up is 255/50/17 Kumho´s on AR TTII wheels

vetterlatethannever

Love the car!

Allthrottleandsomebottle

OK,
Lots of debate here....but here are my own results:
My consolidated list of my personal stock
Wheel size,type, & weight in lbs ea
OEM MAG 17 x 8.5, 17.5
OEM MAG 18 x 9.5, 19.5
OEM MAG 18 x 9.5 w/ new Yoko 295/35-18 AVS sport non-runflats, 50
OEM MAG 18 x 8.5 w/ new Yoko 275/35-18 AVS sport non-runflats, 46

PWO 5 spoke Y2K repos 17 x 8.5 +58mm, 20
PWO 5 spoke Y2K repos 18 x 9.5 +65mm, 23
HRE 18 x 9.5 545 w/ clear center +58mm, 22
HRE 18 x 12 545 w/ clear center +74mm, 27

PWO 17 x 8.5 +58mm w/ oem runflat 245/45/17 (8/32 tread), 50
PWO 17 X 8.5 +58mm w/ new MT ET Street 26 x 11.50 x 17 with TPS & lots of weights, 45
OEM MAG 17 x 8.5 w/ NITTO 555 275/40/17 (1/2 tread), 45
OEM MAG 18 x 9.5 w/ stock OEM 275/40/18 runflats, 53
OEM MAG 17 x 8.5 w/ stock OEM 245/45/17 runflats, 47
OEM MAG 17 x 8.5 w/ new MT ET Street Radial 275/40/17, 47
OEM MAG 18 x 9.5 w/ new Hoosier R3S05 275/35/18 road race radial 4.5 32nds tread with std valve stems 42

CCW drag pack rear 16 x 10 classic full polished with well worn MT ET Street 26 x 11.50 x 16 (1/32 tread) with center cap, 34

CCW drag pack rear 16 x 10 classic full polished with 1/2 worn MT ET Street 26 x 11.50 x 16 (3/32” tread) with center caps, 38


CCW drag pack front 16 x 5 classic full polished with like new Firestone deluxe champion 5.00/5.25-16 (10/32 tread) with center cap, 33

OEM runflat 275/40/18 worn to wear bars, 29
Bridegstone expedia S-01 345/35/18 (9/32 tread), 37
New MT ET Street Radial 275/40/17 (6/32 tread), 30
New MT ET Street 26 x 11.50 x 17 tires (6/32 tread), 25
MT ET Street 26 x 11.50 x 16 tires worn out (1/32” tread) 15.75
MT ET Street 26 x 11.50 x 16 tires (3/32” tread) 18
OEM runflat 245/45/17 (8/32 tread), 29
BFG G-force drag radial 345/30/18 new, 30
BFG G-force drag radial 345/30/18 1/32nd, 29.5
BFG KDW2 295/35/19 new, 32
Yoko 295/35-19 AVS sport non-runflats (2/32 tread), 29
Toyo Proxes RA1 335/30ZR18, new, (8/32 tread in the middle & 6/32 outside edges), 33.2

Topline 5 spoke Y2K repos 18 x 10.5 +58mm offset rims w/ new 275/35/18 BFG G-force TA drag radial, 53

Bob' House of Wheels 18 x 10.5 Chrome Y2K repos widened to 18 x 12. Work was done by Weldcraft Wheels.+56mm (with the 1.5" strip inserted, they should be right at 9.375" backspace, 31

HRE 18 x 12 545 w/ 345/30/18 BFG DRS, 57
HRE 18 x 9.5 545 w/ clear center +58mm w/ new 275/35/18 BFG KDWs, 52
HRE 18 X 9.5" 545 full polished w/ Yoko 265/35-18 AVS sport non-runflats (8/32 tread), 50
HRE 18 x 12 545 w/ 345/35/18 EXPEDIA S-O1 (9/32 tread), 64
HRE 19 X 10" 545 w/ Yoko 295/35-19 AVS sport non-runflats (5/32 tread), 58
HRE 19 X 10" 545 w/ new BFG KDW2 295/35-19 (10/32 tread), 61
HRE 18 x 12 545 w/new Toyo Proxes RA1 335/30ZR18 & TPS, 58.4 lbs

My best 60' times on my 97'
New MT ET Street Radial 275/40/17 on C5 OEM 17 x 8.5 Magnesium wheels = 1.47 60'
Worn out 26 x 11.50 x 16" Mt ET Street on a 16 x 10 CCW drag pack = 1.51 60'
New 26 x 11.50 x 17" Mt ET Street on an PWO Y2K 5 spoke 17 x 8.5 = 1.53 60'
1/2 worn (3/32” tread) 26 x 11.50 x 16" Mt ET Street on a 16 x 10 CCW drag pack = 1.53 60'
1/2 worn 345/30/18 bfg dr on HRE 545 18 x 12 wheel = 1.49 60'
I have over 300 passes on these set-ups together and at different tracks....

Now here was my test:

I lost 84 lbs of wheel/tire combo weight going to a CCW drag pack.............and went from a 10.97 to a 10.87. 60' & DA almost identical
I have done tests on that.........

My street setup:
HRE 18 x 9.5 545 w/ clear center +58mm w/ 275/35/18 BFG KDWs 52 lbs ea.
HRE 18 x 12 545 w/ clear center +74mm w/ 345/30/18 BFG DRs 57lbs ea.

Best so far 10.97@122.25, 1.528 60', DA -775

My CCW drag pack:
CCW drag pack rear 16 x 10 classic full polished with well worn MT ET Street 26 x 11.50 x 16 (1/32” tread) with center caps 34 lbs ea.

CCW drag pack front 16 x 5 classic full polished with like new Firestone deluxe champion 5.00/5.25-16 (10/32” tread) with center caps 33 lbs ea.
Best so far 10.87@125.42, 1.538 60', DA -790

So loosing 84 lbs of rotating mass gets ya about 1/10th.
Results may vary

Drove fine..........even played with et street/radial on the front 10.92 and next dr on the back at skinny in the front

Vesa

Thanks!!!!!! massive and usefull data!

Would the correct interpretation be that using skinny front runners will give you small gains, but due to reduced weight not due to so much smaller rolling resistance?

Vesa

One year has allmost past since last drag event and yesterday I tried with my new suspension setup and tires. New personal record 11.149 / 201.23km/h that´s 125.04mph

Glensgages