Lt1son

Well got my car done alot later than i wanted to and didnt make it to track this year---trying to find out on average what people are running 1/4 with cc503 cars and any input on my setup running what i want

I was hoping to be near 12.0-12.2.. the car ran 13.3 stock with bolt ons and a 1.9 60' Is asking for a second or more out of my setup to much lol--looking foward to hearing what people are running with their 503 setup!!!

Mod list
Car has ac/ps
11:1 Comp 355 forged lower end
Mild ported heads 2.0 1.56 valves
1.6rr's
EWP
58mm TB
Pacesetter longtubed W/y-pipe/cat-back
12 bolt 4:11's
Tubular k-member/a-arms
Rear Tubular LCAS
SFC's
Panhard bar/torque arm
Eibach drag launch kit with koni yellows on stock wheels w et streets

RamAir95TA

Since it is arguably the most widely used LT1 cam (aside from perhaps the hotcam) there are probably several hundred different combinations running anywhere from mid 11s to high 13s with that cam with the norm being mid 12s. Weather, DA, driver, suspension, overall modifications, etc., all play a part.

But if I had to guess on an ET for your setup in good air and assuming you have good traction and all other conditions ideal probably 12.3-12.5.

Lt1son

Thanks... Hope im on the lower end of your estimate lol.

joelster

Your car should have high-11's in it if you get a good launch. Who did the heads? I'm assuming you are a t56 guy since you didn't post a converter in your mods and are running 4.11's. Where in NY are you from? Bring it down to Cecil on the 17th:

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Lt1son

Yes its an m6 car----- sorry about that--- yea high 11's would be good car does have full suspension on it.. i got a few bugs to work out still-- gotta put 58mm tb on and new 02 sensors and putt putt for a while..wanna break clutch in---im in albany ny along way from you lol..thanks for response-- the heads were brand new from a buddy who pulled them off a golen 383-- so i guess golen did them a few yrs back-- nothing crazy as mentioned atleast didnt seem to be to me but price was def right on them he owed me a few favors so got em for next to nothing-- they dont provide flow numbers which sucks i called them and talked to chad about them thats where my info came from--- i feel car has potential for high 11's just way to many combos with this cam as ramait mentioned--only time will tell...thanks again

Lt1son

Bringing this post back from the dead!!!!!! Dropping car off for some dyno/street tuning this afternoon will keep everyone updated on #'s ASAP!!

Slo_Bird

I'm in for the numbers. Good luck man!

ACE1252

I can't get the car to hook off the line(bog or blow the tires off...best is 2.0 60' so far....), but I do have a new best set at Piedmont a week or so ago(1/8 mile). In signature.

I plan on getting some ET streets or Nitto street slicks to get the car to hook better. LoL, when I do, I'll put the tow truck on standby.

I look forward to seeing your numbers.

slick1hunting

what size tire you have on the the rear ace? I believe my best 60 foot was a very high 1.8(when car was mostly stock) with most runs low 1.9. I couldn't really get any time with a bfg drag radial on a stock ws6 rim(over my street tires).


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ACE1252

275/40R17 on SLP SS 17x9 wheels. I have Kuhmo tires on it. I would certainly hope that MT ET streets would have much more grip. Most of my research suggests M/T are best at the track. I would not be daily driving them(going to get two spare SS wheels and change them for track duty). I suppose I could go full slick, but I don't want to tear the rear end out of it.

stngh8r

I'm in for sticky tire numbers.

slick1hunting

I wonder if a person is going to use a dot tire if the 16 or even 15 rim would help. I was seriously dissapointed with my bfg drag radial in 275/40/17. Had a buddy who ran the et streets but soon went slicks(supercharged mustang) I think he put down a 1.7 with them. Not sure what aspect ratio he had but still had quite a bit of wheel spin(but good forward momentum) but he could launch with higher rpm.


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Lt1son

as of now i have nitto555r's with 315/35/17s on rear, track opens ina few wks here so well c.

KW Baraka

Yes.....but it depends on the DOT tire.

When pushing close to 350 HP at the wheels (like a lot of Heads/503cam set-ups), the tire sizes mentioned (275/40-17 to 315/35-17) are generally 'ineffective' for drag racing (launching). Those low profile tires have no 'give' in the sidewall.....and you're gonna spin 'em. It just can't be helped.

Not only would you want to ditch regular street tires for drag tires (DOT drag radials or slicks) but you also want to strongly consider a 15" rim so that you have more sidewall on the tire. Even a low profile drag radial can be a poor choice if you have too much power......just due to not having enough sidewall.

A 275/50-15 or 255/60-15 drag radial.....or a 26x11x15 slick would a good start.

You can go that route......or you can expect to continue to slip on your launch. Remember, it's all about using the 'right tool for the job' .

Just my $.02.

KW

ACE1252

I don't know jack about choosing the correct tire for drag racing, so any advice is welcome. Sounds like my old salad shooters(16's) would be better than my 17's. I just hate riding to the track with different sets of wheels. My biggest problem is the 10 bolt. I want more traction, but do need some give to keep it together.

Lt1Son, did you get your numbers?