12 second pass (other thread got me thinking)??

[chilly460]

OK, piling on.  Toying with idea of trying a few passes at the FE Reunion in April. 

63 Marauder, pretty much full weight, fiberglass hood, figure 4350 with me in it
390 .030", Edelbrocks with cleanup figure 270/190 flow, 270H, 750dp on a Performer RPM, 9.5:1, FPA TriYs into typical 2.5" exhaust with H pipe.   Combo is pretty common, seems like 400hp is attainable?. 

T10 with 3.50 Open.  Tires right now are 255/70/15 on rear, may go 275/60/15 which are a little shorter for more gear. 

Car feels OK, pulls well in low gears.  Lays over on topend and I'll be working very hard to get it figured out as soon as it warms a bit.  Open rear is a concern but no funds to change that at the moment, if I do it I'm going 31spl and better carrier so big investment.  With the T10 though, it is lazy in first and actually doesn't really spin unless you work hard. 

15/36-37* in the distributor, in by 2800rpm.  I have a wideband on it and have some goofy air/fuel readings so will sneak up on it, checking fuel pressure soon. 

So, assuming I get it squared away, I have access to a chassis dyno and do whatever it takes to get it right, will this kind of combo sneak into the 12s?  I'm assuming, again, it will hook somewhat on street tires. 

[fastback 427]

What Carb and fuel pump on it? Most drag races are won or lost in the first 60 ft. Sounds like you'll need to work on traction first then the laying down top end next. Looking at your engine combo looks very doable. Even a cheap mini spool would help.

[chilly460]

Right now it has a Holley 750dp, nothing fancy.  I put an AED 750dp on it, no change on the topend, think it's in the fuel system.  It has a Carter electric returnless, think it may be a little weak although this isn't a killer combo. 

I'm looking for a pair of slapper bars to put on it, should be plenty for this mild combo. 

[cammerfe]

To get crispness at the low end, you should change your diz to have 10* instead of your 15* (If I understood your notation). With 10* built in, you should be able to use as much as 18* initial, depending on such things as gas, and you'll find a whole new off-idle feel to the car.

KS

[chilly460]

I have 15* initial, 37* total. 

[mlcraven]

I'm thinking 12s are going to be a challenge with such a heavy car.  But keep motoring through the top end and MPH will give a good handle on your real-world HP number.

[bn69stang]

What is the diameter of your fuel line from the tank to the pump , and pump to carb ? and any inline filter you may have ?.. Bud

[fastback 427]

I'm with mlcraven. I think once the top end problem is fixed you'll be on your way. That being said, your gearing is way to tall. 4.10 to 4.56 is in order. And slicks. Jmho. People that have ridden in an actual 12 second car know it. That's a fast car. I think most factory big block fords and mopars ran high 13's and low 14's.

[Ratbird]

What clutch do you have in it? I'm breaking in a centerforce dual friction right now. It seems to me that (and know that I have zero knowledge on this) with positrac and slicks you would fry the clutch pretty quick. Do these newer clutches etc hold up a lot better than the stock ones or can I expect it to only last a certain number of drag starts?

BTW, Is the trans a close or wide ratio?

[Jrpumper]

 
      I was just wondering where the fe reunion will be held in April , I'm a big fe fan and if at all possible would love to go

[cammerfe]

I have 15* initial, 37* total.

Do I therefore understand that you have an advance mechanism in the diz that produces 11* (22*)? What kind of diz is it?

KS

[cammerfe]

My '64 Custom, weighing 4080 with me in it, ran 13.27 at 107 with a pair of well-used 8" slicks and an un-locked 4.11.

KS

[Ratbird]

I think he means zero built in and he's running 15 initial, and 37 total - all in at 2800rpm.

[chilly460]

Thanks to all for the responses, I do appreciate it.   

Just to give perspective, I've been in a 10.0x second car, and briefly driven an 11.4xsec car and 10.6xsec car on the street (buddies let me drive).  I have a basically stock 2013 Mustang GT and a 2001 Lightning that made 412hp at the wheels and should run 12s as well, I ran 13.02 in my old '93 Lightning with Powerdyne.  Not saying any of that to say I "know it all", just perspective that I understand what a 12sec car should feel like. 

To be clear, I don't think the Marauder is a 12sec car now, and I understand 12s are a stretch for it. 

I am running 3/8" fuel line, no return (originally wanted simplicity).  My guess is that the fact that the pump can run returnless means it may be suspect as far as performance.  Filter is just a cheapie plastic inline.  I'll get a pressure gauge on it whenever weather breaks and see how it's doing on the topend.  I feel like it pulls ok in 1st/2nd then lays over in 3rd or 4th, which leads me to think it's emptying the bowls, possibly, by the time I hit third.  Car feels nice and torquey, responsive in midrange but goes flat after say 4500.  Springs could be concern too, but doesn't account for it pulling well in lower gears. 

I run a Centerforce Dual Friction clutch. 

Trans is a close ratio, as I believe all galaxie T10s are, something like a 2.20 first gear.  As said, it's lazy in first.  I wanted to avoid slicks due to the T10, plus to be honest it's so lazy in first I don't think they're really needed with current 3.50 rear.   

I fully intend to put a 4.11 center section together at some point, but I want to go 31spl at the same time and with other "to do" stuff as priority, can't swing the cash at the moment.  Car wheel hops badly so some type of traction bar are first up.  I have an aluminum driveshaft ready to go in, but won't put it in until I have the bars. 

Distributor is an MSD Billet, have it setup right now with 15* initial timing, 37* total....meaning it advances 22*. 

Jrpumper, the FE reunion is being held at Beaver Springs Raceway in PA, 4/26/2014. 

I'll get some data and report back, like I said I can get it dyno'd.  Curiosity is there because some guys have similar combos and have run low 13s or 12s, and some cars with strokers and gear run in the 13s.  Trying to optimize what I have, but still with understanding it is a street car.   

[bluef100fe]

I think with the parts you have and the weight of the vehicle your not going to see 12's... Maybe mid 13's... Just judging from my own experiences with a heavy vehicle and small engine... Way back when I had my brother Kyle's dove head 460 in my truck it weighed 4340 with me in it. 3.50 gears mini spool, stock C6 and converter 26 tall street tires... Leaving from just off idle the best it ran was 13.1xx around 104-105 mph.. Engine was probably around 450-500hp heads were ported with stock size valves 238-248 @0.050 solid flat tappet cam. Stealth intake holley 850dp and 1-3/4 headers.. Truck didn't spin off the line but the converter was tight enough to make it slow out of the hole... 60 foots were in the 2.0-2.1 range... Long story short... I'm guessing your car will be close to this... You should be able to Taylor your launch better with a clutch than I could with a slush box... Assuming you get your top end figured out... Good luck and have fun..