Do you think this combo can run a 10.50 1/4 mile.

Car 1989 Mustang Coupe,Weight i'm guessing around 3,200 to 3,300 lbs. with me in it,C-4 Coan 3,800 to 4,200 stall converter no brake,3.73 gears and MT 28X11.5X15" Et Street tires,MAC 2" Headers thru 3" exhaust with Magnaflow Mufflers.Engine 466 ci,Flattop SRP Pistons,Eagle H-Beam Rods,Aluminum Cj heads Int.332.8 cfm at .700 lift Exh.242.9 cfm at .700 lift with pipe,Herbert Solid Roller Cam .670-.690 lift 256-266 duration at .050,Victor Intake 1,000 cfm HP Holley annular booster carb.I have ran a best of a 11.27 at 122.73 mph with no tunning with the air cleaner still on it with the Et Street tires.All i did was left air out of the rear tires and shifted at 6,800 rpm on 93 octane pump gas.

Thanks Mark.

I think you can get there with that combo with some tuning and a set of slicks

NO ...
More gear, more converter, more cam and more tire will probably get you there.

What was the 60', the 1/8 mile time and at what rpm did you go across the finish line ?

I would say that you should be able to get close to that, you ran 122.73 mph, that in itself should be around a 10.80.

Everything will have to be right Mark. More gear,more tire,more cam imo

paulie9fingers wrote:What was the 60', the 1/8 mile time and at what rpm did you go across the finish line ?

I would say that you should be able to get close to that, you ran 122.73 mph, that in itself should be around a 10.80.

60 ft. time was only a 1.692,the 1/8 mile was a 7.284 at 99.25 mph i didn't notice what the finish line rpm was.

Thanks Mark.

I have things i want to try for next year the first thing is getting a roll bar.I also know the rear tire pressure wasn't low enough.I also plan on a windage tray on the engine,so i can try to shift higher.Also rear shock and front strut adjusment,try to make a air pan for the carburetor.I'm going to try and get the street tires to work wish me luck i think it can be done.As far as the gear and converter it gets driven on the street more than the track so i plan to keep them as is.If i can get it to even run 10.70's-10.80's i'll be happy since i'll only be off 2 to 3 tenths for the 10.50 index races next year.

Thanks Mark.

My mustang is lighter its 2735 with driver and had a best of 10.57 @ 128 mph with a 1.48 60' at its best with a tci 11'' converter that i couldn't foot brake over 1500,c6 trans, its a 472'' trw dish pistons L2404,C8 ported heads with 2.19-1.72 valves,unportmatched victor with a hp950 carb 76-86 jets the cam is a comp 292 magnum flat hyd 244@.050 -560 lift the springs are wornout singles from a 280 cam so it wouldn't pull any higher than 5800. The rear is a 8.8 with 390's and a 28x10 slicks running 14lbs of air. And my buddy Melvyns mustang (514fox87) is 400lbs heavier and he's been 9.94 or 95 and his combo is a older crate 460" with the aluminum cobra jets and they dont flow as much as yours it has flat tops with the 4 notches,victor intake,1000hp pro systems carb his cam is a comp flat solid 256-266 @.050 589-615 lift,he shifts at 6400, his trans is a c4 with a 3200 to 3600 stall footbraking it to 2200 and his gears are 389's with a 28x10.5 slicks with 14lbs also, so yea i still think 10.50's are possible outa your combo if not a little better.

Mark ,Just remember that the weight of the cage will probably slow you down at least 2 tenths ,according to the weight.

cage adds weight but also stiffness, its usually a gain-loss type of deal.........pretty much a wash..and a whole lot safer.

Also a big pita if its a 90% driver

The 60' is definitely slow for that car. When they are worn out, I would replace the 28x11.5 ET streets with a 275-50 ET street Radials and you should have no problem hooking them. These tires are way more stable, they are shorter and do not grow on the top end which will help add some more gear to the car without actually changing them . The 1/8 mile is pretty close to what it should have been for the 1/4 mile et but again, your mph is high for the et. You can start playing with the shift points, I think you may be shifting a little to high, once you find the best performance, start messing with the timing, add or subtract timing until you get your best mph or et and leave it there, then do the same thing with the jets. After that you can fine tune everything by messing with the shift points again, I really think you should be able to get close to what you're looking for with fine tuning.

I think more gear and about a 5k converter will get him solid high 10's without getting into the engine but I agree I think more cam is going to be needed to pull of mid 10's. Short times down into the 1.4's for that kind of ET. Also, I've found true slick hook way better than et streets regardless of the advertising. You may scam a few tenths out of your tune but I don't think 7 comfortably. That's a bunch of time to make up.

^^^^ I agree, I don't think he's going to see .50's but I think he can tune what he has and run .80's all day long with some .70's here and there.

paulie9fingers wrote:^^^^ I agree, I don't think he's going to see .50's but I think he can tune what he has and run .80's all day long with some .70's here and there.

Anywhere around here, running heads-up with a 10.50 index, that's a first round loser.

Thanks guys all good points,i'll probably only make 1 to 2 races and it's a local track so if i get beat first round no problem.Most of my money that i have to play this winter with will go towards a roll bar.Then maybe the following year i can,look into tires,gears and possibly camshaft.And like i have been saying there has been no tunning done at all on the car.Jetting,timing and suspension is just like it was when i drive it on the street.

Thanks Mark

rmcomprandy wrote:
Anywhere around here, running heads-up with a 10.50 index, that's a first round loser.

It was nice talking with you Randy

Around here he wouldn't even qualify, it is a 16 car field most of the time and sometimes a 32 for the bigger events. The bump on a 16 car field will generally be in the mid to upper .60's, I don't think the 16 car field has ever even been in the .70's.

paulie9fingers wrote:

rmcomprandy wrote:
Anywhere around here, running heads-up with a 10.50 index, that's a first round loser.

It was nice talking with you Randy

Around here he wouldn't even qualify, it is a 16 car field most of the time and sometimes a 32 for the bigger events. The bump on a 16 car field will generally be in the mid to upper .60's, I don't think the 16 car field has ever even been in the .70's.

At the tracks around here, the 9.50 index class is that way however, the 10.50 class usually has a very lenient bump spot; except at big race weekends.
Those NHRA index classes allow 1 stage of nitrous so I like to watch the "all motor" class most of the time.

Mark Miller wrote:Car 1989 Mustang Coupe,Weight i'm guessing around 3,200 to 3,300 lbs. with me in it,C-4 Coan 3,800 to 4,200 stall converter no brake,3.73 gears and MT 28X11.5X15" Et Street tires,MAC 2" Headers thru 3" exhaust with Magnaflow Mufflers.Engine 466 ci,Flattop SRP Pistons,Eagle H-Beam Rods,Aluminum Cj heads Int.332.8 cfm at .700 lift Exh.242.9 cfm at .700 lift with pipe,Herbert Solid Roller Cam .670-.690 lift 256-266 duration at .050,Victor Intake 1,000 cfm HP Holley annular booster carb.I have ran a best of a 11.27 at 122.73 mph with no tunning with the air cleaner still on it with the Et Street tires.All i did was left air out of the rear tires and shifted at 6,800 rpm on 93 octane pump gas.

Thanks Mark.

IMO you need some tuning, my 1st fox with a 466 and Iron CJs went 10.10-10.20 all day long with a glide, 4500 convertor and 3.89 gears on 28" ET Street.

dfree383 wrote:

Mark Miller wrote:Car 1989 Mustang Coupe,Weight i'm guessing around 3,200 to 3,300 lbs. with me in it,C-4 Coan 3,800 to 4,200 stall converter no brake,3.73 gears and MT 28X11.5X15" Et Street tires,MAC 2" Headers thru 3" exhaust with Magnaflow Mufflers.Engine 466 ci,Flattop SRP Pistons,Eagle H-Beam Rods,Aluminum Cj heads Int.332.8 cfm at .700 lift Exh.242.9 cfm at .700 lift with pipe,Herbert Solid Roller Cam .670-.690 lift 256-266 duration at .050,Victor Intake 1,000 cfm HP Holley annular booster carb.I have ran a best of a 11.27 at 122.73 mph with no tunning with the air cleaner still on it with the Et Street tires.All i did was left air out of the rear tires and shifted at 6,800 rpm on 93 octane pump gas.

Thanks Mark.

IMO you need some tuning, my 1st fox with a 466 and Iron CJs went 10.10-10.20 all day long with a glide, 4500 convertor and 3.89 gears on 28" ET Street.

Dave,

That gives me some hope i just need to keep tunning and get the power to the pavement.

Thanks Mark.

Bump to the top.Looks like i'll be getting a roll bar this year.

Mark I think you should be able to get the car down to 3000-3050 with some very basic weight removal. All 3 of my 86 GT's were 3100 with me in them and only thing really done was removing sound deadening material. Iron headed 466's with cat manifolds and exhaust all the way to the back bumper. Mine were all hatchbacks and pretty sure the coupe is a little lighter to begin with. Those were your only 2 passes with the car correct? I have dropped a full second of an ET on a new combo just learning what the combo wanted to be driven like so can't base much of just 2 passes except the mph and that may very well improve once you figure out what the combo wants.

I think you can get it close if you get a better handle on the 60 foots. Mine with the 950 did not like an air filter on it at all. You might make a pass w/o it and see what it does.

Good luck and I look forward to seeing your progress.

bigblok2000ranger wrote:Mark I think you should be able to get the car down to 3000-3050 with some very basic weight removal. All 3 of my 86 GT's were 3100 with me in them and only thing really done was removing sound deadening material. Iron headed 466's with cat manifolds and exhaust all the way to the back bumper. Mine were all hatchbacks and pretty sure the coupe is a little lighter to begin with. Those were your only 2 passes with the car correct? I have dropped a full second of an ET on a new combo just learning what the combo wanted to be driven like so can't base much of just 2 passes except the mph and that may very well improve once you figure out what the combo wants.

The day i ran the 11.27 at 122 mph i only made 3 passes with no tuning.I would say the car only has 12 passes,only 3 times to the track since i put the 466 in it in 2004.There has been no tuning on the car and the one time the track was complete junk.

Thanks Mark.

BigBlockRanger wrote:I think you can get it close if you get a better handle on the 60 foots. Mine with the 950 did not like an air filter on it at all. You might make a pass w/o it and see what it does.

Good luck and I look forward to seeing your progress.

I made a air pan for my car but have not raced the car since then.I'll try the air pan and without the air filter if i get to the track this year.I'll keep you guys posted on the racing and roll bar process.

Thanks Mark.