[67gtospud]

Tonight was the first time I've run my car. Was about 90* my first couple passes. Was nothing spectacular but an absolute blast! My first pass was 14.5@101mph with my best being 13.5@103mph. I ran on street tires and fought traction issues every pass. The first 2 passes I was shifting into 4th about 100' before the finish, then the last few I was crossing the line in 3rd gear @6300ish rpm. My 60' is terrible and I feel like if I could get that down I could get into the 12s.

Attatched are my timeslips. I tried to keep them in order: I ran friends and won each time except my last which was my 13.5 pass.

[Baron Von Zeppelin]

You even beat the last guy on ET , but he got started a lot sooner than you did.

Congrats on getting out and putting it in the wind !
G.ood T.imes O.ften

[dataway]

Did you get that wonderful shaky gas pedal leg waiting on the line?

[steve25]

There's good potential there ( 103 mph ) if you hook it up and stop sleeping at the line, lol!

According to my chart if your car weighs in between 3600 and 3800 lbs your then making between 514 and 543 HP at the flywheel and you should beable to cut mid 12s

[slowbird]

Originally Posted by steve25

There's good potential there ( 103 mph ) if you hook it up and stop sleeping at the line, lol!

According to my chart if your car weighs in between 3600 and 3800 lbs your then making between 514 and 543 HP at the flywheel and you should beable to cut mid 12s

What? 103mph at 3800lbs is nowhere near 500hp. But i do agree, with more tuning there is mid 12's

[cnc]

Originally Posted by slowbird

What? 103mph at 3800lbs is nowhere near 500hp. But i do agree, with more tuning there is mid 12's

Just asking here but how do u calculate this mph weight to hp???

[cnc]

Great to hear ya got out and ran it through the gears ..... not sure if I will get out this year at all....hope to before the car comes off the road .....

[Scott Stoneburg]

Nice job, 1st time out. Be careful.
, its addicting..lol..just go out and have fun

[Navy Horn 16]

You will never get there with street tires.
Put some drag radials on that bad boy, and it will be a totally different car. Nitto 555s are a great tire for street use with occasional trips to the track. If you really want to hook (as the time slip sickness progresses) Mickey Thompson ET Street SS' is one hell of a good tire.

[PDC]

Very Nice! Shaving a full second off your et over the course of a few passes is very steep learning curve. I calculated your overall gear reduction in 1st gear at 8.7‘ish which goes to show, these big torque engines just don’t need a ton of gear reduction to haul the mail. Definitely update as you experiment with different tires.

[ponjohn]

Originally Posted by 67gtospud

Tonight was the first time I've run my car. Was about 90* my first couple passes. Was nothing spectacular but an absolute blast! My first pass was 14.5@101mph with my best being 13.5@103mph. I ran on street tires and fought traction issues every pass. The first 2 passes I was shifting into 4th about 100' before the finish, then the last few I was crossing the line in 3rd gear @6300ish rpm. My 60' is terrible and I feel like if I could get that down I could get into the 12s.

Attatched are my timeslips. I tried to keep them in order: I ran friends and won each time except my last which was my 13.5 pass.

Great combo.



Do you have an idle videos with that cam?

[OCMDGTO]

Awesome that you're getting out there and having fun! 5 runs in less than 5hrs sounds like a well run track. I spend 4hrs there to get 2 runs here! You've got some great parts in that engine, definitely a good bit more in it unless there's an elevation factor involved . Trans and rear might be weak links which you will discover with traction. Fuel delivery and traction will get you there. Good luck!

[grandam1979]

Just remember next time out leave on the last yellow act like the green isn’t even there. Good times for first time out car runs good.

[67gtospud]

Thanks guys! A little shakey let the first pass but not bad lol. The car hit the scale right at 3600 with a full tank of gas, 3820 with me in it. With the hot air my AFR gauge was reading very rich all night and I forgot to bring jets with me to lean the carbs out. I want to put slicks on, but not on this 10 bolt! I do have a bad habbit of sleeping at the light, I'm working on that. I'll likely go out once more this year in September on a cooler night.

[ta man]

Originally Posted by steve25

There's good potential there ( 103 mph ) if you hook it up and stop sleeping at the line, lol!

According to my chart if your car weighs in between 3600 and 3800 lbs your then making between 514 and 543 HP at the flywheel and you should beable to cut mid 12s

From Wallace Racing ..305.51hp from et and 327.01 from mph.
Always a steep learning curve the first time. I think you will easily drop 1 second and gain 10mph with just tuning. The potential of the engine is an easy mid 11 second/120mph range slip

[67gtospud]

Originally Posted by ta man

From Wallace Racing ..305.51hp from et and 327.01 from mph.

I would imagine those calculators figure perfect traction and conditions. I don't know my actual hp, but can assure its more than 327 lol. I was spinning through 1st, and spun after my 1-2 shift on every run.

[ta man]

Originally Posted by 67gtospud

I would imagine those calculators figure perfect traction and conditions. I don't know my actual hp, but can assure its more than 327 lol. I was spinning through 1st, and spun after my 1-2 shift on every run.

Yes especially for the et formula. What is weird though if one stays in the throttle the mph doesn't suffer as much with lack of traction unless your spinning all the way down the track.
I used to tune for power on sketchy track nights by not looking at the et and concentrating on the mph..as long as the mph was climbing I knew I was going the right way as far as tuning.

[67gtospud]

I also did the mph-rpm calculators and found my tach is off (which I suspected). Seems its off about 600rpm up around 6000 (tach reading). I thought I was shifting at 6k but it was more like 5500 actual rpm. The car was still pulling hard so I'll have to remember to add that on when I'm shifting.

[TCSGTO]

Originally Posted by 67gtospud

I also did the mph-rpm calculators and found my tach is off (which I suspected). Seems its off about 600rpm up around 6000 (tach reading). I thought I was shifting at 6k but it was more like 5500 actual rpm. The car was still pulling hard so I'll have to remember to add that on when I'm shifting.

The factory tach in my 68 is exactly 10% fast at all rpms like yours. I have a Pertronix Digital HP ignition box that has a calibration feature that lets you send a rpm signal to the tach to check accuracy. It also sweeps to the preset rev limit when you turn the key to the on position.
Most factory tachs read fast, the manufacturers may have done this on purpose to keep the connecting rods inside the block.

[Old Man Taylor]

You'll have no trouble getting into the 12's with a good 60' time. I'm guessing about 12.3 at 113.