N/A 4v build
- Thread starter fs308
- Start date
Now now guys lets not fight. Im staying N/A. I think its more impressive staying N/A and running good times. If you look at the time slip some of the 4v NA guys are doing pretty well for stock heads an cams and block. Mr. Patience ran high 11s. Im waiting untill i get my short runner and long tubes and then tune and ill see what ill run. But once you max out you stock block you will have to up the the compression and so on. I have a NA car and SC car and both are fun to drive but also very diff type of fun. Good luck and keep us posted.
Wow... Bob Cosby is here! A legend for us NA newedge cobra.
Who is doing your shortrunner?
note this isnt in a new edge car. this is a fox coupe that has had a lot of weight reduction. the car should weigh around 2600-2700max with the 4v and myself in it
At that weight an n/a 4.6 will get you down the 1/4 very quick. JIMS SVT went 10.79 at 2900lbs witha stock shortblock B headed engine. A higher compression FR headed engine will make more power and get down the track in a fox body couple even quicker.
:rockon:
An 86 LX notch with Terminator running gear and stiffened chassis would be second on my list next to my 04. That would be a "savage" combo :mj:
Remember that "wall" thing and NA I spoke of.
:beer:
I understand you don't want to have a blower make up for all the shortcomings in a motor.
In most cases, a motor that makes good power N/A will be a good motor for FI and will make more power with less boost (if you decide to go that route eventually). But regardless of N/A or FI, many of the same areas need to be addressed. Good flowing heads, properly selected intake and throttle body, free flowing exhaust, etc. Compression ratio and cam selection will differ a bit depending on how specialized you want to get in either direction, but the same rule applies: If it runs good N/A, the FI will only compliment the setup amplify the power made.
All the little tricks in the book add up...and it's especially important to pay attention to those details for a N/A motor.
Don't be afraid of compression. Go with a 10.5 or 11:1 compression at least!! For every extra point in compression, the motor will make an approximately 4% more horsepower. Let's say a motor makes 400HP in 8.5:1 trim. Bumping the compression to, say, 11.5:1 means the high compression version of the same motor would theoretically make an additional 48HP with all else held constant. Additional mods such as an increase in bore/stroke would only amplify this.
Increasing compression is the most fundamental yet effective modification you can do to a motor. It improves driveability, mileage, throttle response, torque, emissions, and makes more power. Just don't get too carried away with compression. If you have E85 in your area, you're in luck!!
Homer
Some of us idiots just like doing things the hardway. My personal goal is to run 10's N/A in a car that I can drive to the track.
You smart people can do it anyway you wish.
Have a nice day, and good luck to you no matter which route you choose to go down.
Bob
You smart people can do it anyway you wish.
Have a nice day, and good luck to you no matter which route you choose to go down.
Bob
cobraracer46
Banned
Here is an idea,How about building a strong performing N/A engine and then bolting on a blower:burnout:
One Aftermarket manufacture built a 98 Cobra engine with fully ported 2001 Cobra heads, ported 2001 Cobra intake, Steel connecting rods and 11:1 pistons and then topped it off with a Vortech SQ blower with a Vortech air to water aftercooler. The blower was pullied for 10 pounds of boost and the result was over 660 RWHP.
The 4.6 Cobra engine responds well to compression and while high flow heads and big cams will result in a power increase, the torque production will suffer unless the compression is increased.
I personally would be disappointed to have a 300 something rear wheel HP car after sinking thousands of dollars into an "N/A" engine project.:fm::cuss:
Think about this: all of today's really high HP super cars like the AMG, ZR1 Corvette, Mustang shelby GT500, Bugattii and Nissan GTR employ forced induction.
Yup, you N/A guys can go ahead and add super low rear gears, torque killing short runner intake, ported heads, what ever trick part I forgot about, ripp out your interior and run 11's at the drag strip
I'll enjoy bolting on a Vortech T trim blower for now and have fun with the power.
One Aftermarket manufacture built a 98 Cobra engine with fully ported 2001 Cobra heads, ported 2001 Cobra intake, Steel connecting rods and 11:1 pistons and then topped it off with a Vortech SQ blower with a Vortech air to water aftercooler. The blower was pullied for 10 pounds of boost and the result was over 660 RWHP.
The 4.6 Cobra engine responds well to compression and while high flow heads and big cams will result in a power increase, the torque production will suffer unless the compression is increased.
I personally would be disappointed to have a 300 something rear wheel HP car after sinking thousands of dollars into an "N/A" engine project.:fm::cuss:
Think about this: all of today's really high HP super cars like the AMG, ZR1 Corvette, Mustang shelby GT500, Bugattii and Nissan GTR employ forced induction.
Yup, you N/A guys can go ahead and add super low rear gears, torque killing short runner intake, ported heads, what ever trick part I forgot about, ripp out your interior and run 11's at the drag strip
I'll enjoy bolting on a Vortech T trim blower for now and have fun with the power.
**** me.. I'm finding myself agreeing with Cobraracer again :bash::bash:
Arghhh....
Here is an idea,How about building a strong performing N/A engine and then bolting on a blower:burnout:
One Aftermarket manufacture built a 98 Cobra engine with fully ported 2001 Cobra heads, ported 2001 Cobra intake, Steel connecting rods and 11:1 pistons and then topped it off with a Vortech SQ blower with a Vortech air to water aftercooler. The blower was pullied for 10 pounds of boost and the result was over 660 RWHP.
The 4.6 Cobra engine responds well to compression and while high flow heads and big cams will result in a power increase, the torque production will suffer unless the compression is increased.
I personally would be disappointed to have a 300 something rear wheel HP car after sinking thousands of dollars into an "N/A" engine project.:fm::cuss:
Think about this: all of today's really high HP super cars like the AMG, ZR1 Corvette, Mustang shelby GT500, Bugattii and Nissan GTR employ forced induction.
Yup, you N/A guys can go ahead and add super low rear gears, torque killing short runner intake, ported heads, what ever trick part I forgot about, ripp out your interior and run 11's at the drag strip
I'll enjoy bolting on a Vortech T trim blower for now and have fun with the power.
You do what you want.
But I intend into running 10s with LESS power than you, and without a power adder. Still being able to drive the car on the street without problems.
My car gets more compliments, more attention, and more heads turned...than a simple vortech t trim blower.
Excuse me and the others for enjoying to actually WORK on our cars, and not just bolt on some piping and calling it a day.
A strong and fast N/A car, gets a lot more attention and respect than just another centri-blower cobra.
I could have spent a little more money and gotten a centri-blower...and what would I have? more power and a LESS reliable motor that would throw a rod at anytime. I enjoy my throttle response and power while having a much STRONGER motor. I have a hard time regretting anything I have done on the car, when everytime I turn the key on it I hear this..
[ame="http://www.youtube.com/watch?v=AsFjgvfQx_I"]YouTube- 96 Cobra COMP cams idle[/ame]
And it steals everyone's attention on the road..it's quite empowering.
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Nice idle vid!!
N/A is simple, reliable, and lightweight. Not to mention it is equally simple to fuel and to keep cool.
Ive thrown plenty of money at my N/A 4.6l and the only thing I regret is going with a simple .020" overbore and not a 5.0 BB. Theres always the next build thats the one thing that seems to be constant between all modular motors F/I or N/A.
N/A is simple, reliable, and lightweight. Not to mention it is equally simple to fuel and to keep cool.
Ive thrown plenty of money at my N/A 4.6l and the only thing I regret is going with a simple .020" overbore and not a 5.0 BB. Theres always the next build thats the one thing that seems to be constant between all modular motors F/I or N/A.
no offense, i like your car and all but where do you get that bolting on a supercharger or turbo will make a motor a ticking time bomb? there have been plenty of people who have done so, made well over 450rwhp, ran 10's on a stock motor, and there motor have lived plenty long. A stock motor can throw at rod at anytime, just as a supercharged car can.
And as far as actually "WORKING" on a car as you put it. you say people installing a turbo or supercharger are just bolting on some piping.. All you did was bolt-on some heads, and bolt-in 4 billet sticks on them and called it a day. No need to down talk other people for being slackers, lazy asses, etc for the choices they make in modding their car.
And as far as the OP goes, i don't see why any supercharger or turbo kit wouldn't work with a carb'd modular motor in a fox. The engine bay is just about exactly the same. the only problem is maybe the F1, F2, F2R kits that sit on the driver's side head (wold interfere with the distributor).. Throw a carb hat on it, and run some different piping than your average mod motor and go. I mean, it's not like running some piping is actual WORK.. ;-)
And i believe you can get a 5.0 Boss block for around $899 now, which isn't a bad stating point at all.
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cobraracer46
Banned
Just for the record, I do like N/A Ford DOHC Modular engines and the Roush Yates built 5.0 DOHC modular cobra engine that puts out 500HP with the sky high compression, FR500 intake and other goodies is on my top ten list of engines.
I'm also a big fan of forced induction and I once heard a Cobra with a 11:1 pistons and a Vortech spinning away in person and that had to be the meanest sounding Ford I ever heard. Like I said, I like N/A and forced induction Ford engines so for now I'm going with the instant gratification of bolting on a Vortech and having some fun, but make no mistake, when engine rebuild time comes around, the motor in my Cobra will get a set of 11:1 CP pistons, Billet rods, ported heads , intake and then I'll bolt back on all of the Vortech piping.:-D
I will not have to worry about reliability with the Vortech because I'm not going to spin the engine to the moon, as excessive RPM's break the stock rods, and I'm not going to worry about burned pistons either as improper tuning fries the stock pistons, not because they are Hyperutectic.
By the way, I do enjoy working on my own car as well, including cutting and welding on it.
Bottom line, if running N/A forever is the way your Cobra rolls, fine, enjoy.:burnout:
at the end of the day a ten second car is a 10sec car......
Ahh aint that the truth!
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