Ok my 68 convert. is currently running 0-60 in 4.0sec on normal street this is with the following setup.

408 with 550HP at 5800rpm
5spd tko 600 0.82od
3.73 rear
Kumho spta 275-35-20 in the back
weight of car is around 2600
Multiadjustable VBP spring in the back
QA1 semi coilovers in front and QA1 adjustables in the back

My question is this, is it feasible to dream of a 3sec car? when i do NOT want to flare the fenders and i cannot go any wider on the backtyres, i do not want to run slicks, this had to be a streetcar, only giveaway to the modifications from the outside is the billet specialties rims and i want to keep it that way.

maybe a 6link could help with better traction? a lower gearing in the back? - can't tell you why i want a 3sec street car other than for the bragging rights and offcourse the nice fealing of chasing a dream.

appreciate any ideas that will get me moving so to speak or alternativly arguments for forgetting the dream

 

Dang, I love the look of flares

 

Adjust gearing such that you can reach 60 mph in 1st gear. Having to shift before 60 will add precious .10's. Add some MT ET Streets or ET Street Radials and practice your launch.

 

I agree, enough power and a long first gear get you there. A 3.08 rear end with a 2.87 first gear will get you to tad over 60MPH in first @7000RPM, hey that what I have, athough you would be up in smoke from the start, so you would need slicks

 

My 63 does 0-60 in .97 sec. 1.130 60' Ya I'm braggin....

 

That's just mind boggling....
60 mph in less than 1 second, AND in less than 60 feet!

 

PNK...

Love the look of your car....
ya just gotta love those 68 verts... especially the red ones

Mate, you've got a quick car already.

To get the 0-60 time down further, all you need to do is improve traction to get you going quicker.

The problem is, to get the traction, you place even more stresses on the entire drive train AND chassis.

Be prepared for more expenses to toughen up driveline as well as stickier tyres.

I doubt you'll get that sort of performance on the street though...
Best chance is on a well prepped drag strip.

A wise man once said to me....
"Nothing is impossible.... it just takes time and lots of money!"

 

Where are you getting your 0 to 60 times from? I don't doubt that your car is quick, but if you're serious about how quick it is, take it to a drag strip and post some times.

 

PNK,
A C3 small block weighs around 3400 pounds, so I'd like to know what you chucked out to lose 800 pounds and still have a functioning car. Let's see, swap cast iron manifold for aluminum......10 pounds?
Swap iron heads for aluminum.........40 pounds. Aluminum calipers, another 20 pounds, spare tyre, 20 pounds maybe. Lightweight starter, another 10....there's a hundred, still 700 to go........

Regards from Down Under

aussiejohn

 

I'm using the GT-2 Gtimer performance meter on my car and I've been able to pull a 4.1 sec 0-60mph time. The best 60' time was 1.84 on the street with 255/60/15s. I haven't weighed the car yet but I've used the stock weight numbers and weighed the parts that I took off and I'm guessing I'm between 3000 and 3100 lbs. I got the Dragvette basic kit with the 6-link on the way. Also the VB&P 420 rear composite spring, Bilstein sport rear shocks, summit adjustable front shocks set to the 90/10 setting, and the moroso front trick springs at 213 lbs with 3 coils cut for the drop. I have a 3500 stall converter but I'm only able to launch at 2700 without spinning the tires.

If I were you I'd look into the stickiest street tires you could find and try to get the gearing right so you could get to 60 mph in first like the other guys said. Good luck man, I'm also on the same quest your on so I'm following this thread!
If you haven't tried yet, mess with the frontend a little to get more lift and the weight transfer should be better for traction so you could launch harder.

 

Those 275-35-20 Kumho tires have a wear rating of 320 which means they aren't the stickiest tires around plus being only 20 series doesn't help much. Not sure if you can get real sticky tires with the rim size you now have.

 

Check my sig........I have well over 150 passes in this car in the last year.

Did not mean to steal the thread................

 

Something to consider, since your on street tires, is reducing rotational mass of your flywheel/clutch, which could improve traction and speed up your shifts a bit (up and down). Also, if you are having to shift more than once before reaching 60mph, you need a taller gear, and wider and/or stickier tires are in order.

That said, you're heading down an addictive path of distruction, so you'll eventually be calling Tom's Differentials for a 12-bolt IRS to replace your stock setup. And, if you decide to speed shift, you'll be building a new engine ahead of schedule, too.

Simple fact is, going faster and faster usually costs cubic dollars. So, in you quest for ultimate 0-60's, don't loose sight of the big picture and end up spending more than you bargin for. But, if you can afford to play, all the best!


PS: How did you get your weight down so low??

 

Helium....

0-60 in.97? That does steal the show. If you don't brag, I will for ya!

 

[QUOTE=PNK;1560224940]Ok my 68 convert. is currently running 0-60 in 4.0sec on normal street this is with the following setup.

.............weight of car is around 2600...........

how did you get down to 2600 lbs??

i'm currently at 2.815lbs with my '77 after nearly have shaved all the un-needed weight (the list would be too long...), i'd drop weight by another 60lbs getting an alu blk and maybe another 40lbs building an alu custom front part which holds the 'nose' of the car...but 2.600lbs GEEEEEZ!!!

 

Thank you for the replys guys

first off the 68convertible weights totally stock (at least mine did) 1440KG = 3174.5 LB
Ive since shaved of almost everything thats possible without changing the Looks and functionallity of the car, also swapped to lighter parts where possible, incl homemade aluminum brakets for bumpers and stuff like that, i even had my chromeguy remove alot of material on the chromebumpers before chroming.
i made tons of little tweaks here and there that all added up for the weight loss

only thing i need to add for extra weight atm is Toms 12bolt and homemade rollbars behind the seats. i am gonna offset that buy getting an aluminum block.

I am fully aware that this dream cost alot of money (already have more than 100.000usd in the car and i make all work on it myself)
just so that you dont think im spewing numbers out, import tax and transport to DK literally doubles the sparepart prices here compared to the US.

69NOX - that is just but awesome.

TheSkunkWorks - thanks for the idea, but i am allready running a 18lbs RAM alu flywheel.

745400 - hmm yeah i am looking into other tires maybe a set of Nitto would be better for grip.

Strokervette - i am also using the GT-2 for my data, i wholeheartedly agree that shifting costs valuable time i can clearly see on the readout when i shift, so yes going to 60 in first would prolly be the best idea, i have a 3.08 rear in the garage, i will try to bolt it on and see what difference it makes.

OzzyTom - thank you very much mate i agree my biggest problem is traction, that is why i asked about the 6link and if that could possible help me with better grip?

ML67 - Motorhead- i can defiantly see that the consensus is that gearing has to be thought out carefully and i agree, but i would love to know if theres any other options out there for getting more grip, would a bigger diameter reartyre help? 275- 45-20 ?

maybe upping the powerband of the engine, atm its 2500-6200
with a CCbadmuthathumper hydraulic roller, im using a performer rpm airgap but considering swapping to my victorJr just to see if theres any diff.

will shaving more weight equal more wheelspin or faster acceleration?
i am considering a tubeframe for stiffness and weight reducing.

 

ET STREET Drag Radials 275/60R15, a nice burnout to warm them up and a little bit of VHT and you'll hit 0-60 in under 3 seconds.. I doubt that 0-60 in 3 seconds is possible with no VHT (on the track). On the street, it's difficult to accelerate much faster than 3.9 seconds even if you have 1500 Horsepower.. You need a sticky tire (can be street legal) as also VHT (track compoind) to get your 0 - 60 time below appox. 3.9 seconds. On the street, I highly doubt that this is possible with narrow tires.. If you'd run a 14 inch wide slick for sure, but not on 9 inch wide tires.. My '68 race car ran about 1.5 seconds from 0 - 60 on 10.5 inch wide slicks but that was at the track with a lot of VHT at the track..

I ran 1.39 - 1.40 60' times at the track.. If you have a 1.35 60' time, you are at 60 mph after 1.35 seconds.. With my new setup and a 250 shot of nitrous, I want to get my 60' times to 1.25 - 1.29 which would make my 0 - 60 time about 1.2 seconds

Another thing that you'll definetely need (other than Drag Radials) is 90/10 front shocks and very soft front spring (I run Moroso Trick front springs 213 lbs/inch - cut down by 2 coils = 250 lbs/inch).
Stock '65 small block springs (from no a/c cars) should also get the job done. You'll also need a VERY stiff rear spring and QA1's in the rear (set VERY stiff too)

 

Trying to keep up with you guys.... what is atm?

 

Here is a site with lots of calculators....1.13 60' is 72 mph at the 60' lights.

http://www.wallaceracing.com/Calculators.htm

 

atm = at the moment.