what cam can i use?

RichV · Feb 7, 2013

We'll see if he chimes in, but what you're saying is everything stock Cobra but a tune 260rwhp? I just find it hard to beleive. All my 5.0 experience says this is not possible, again stock 5.0 Cobra.

I'd be happy to hear the combo. I wouldn't expect anything over 240ish at the wheels.

Addermk2 · Feb 10, 2013

Rich, back in 2006 My cobra made 253hp without the tune.

Mods were: 70mm TB, UDP's, EL Shorties, O/R X-pipe, MAC Produmps, and a CAI. The car ran excessively lean during the dyno pulls, so much so that the dyno operator was afraid to blow up the car.

After I made some fueling changes to the maps, and some nice tweaks to the timing tables, I was able to get the car up over 270hp.

Generous dyno? Maybe... but that 253hp was enough to get me a 14.02@101mph. Had I not shifted into 4th gear, I wouldve broke 13's.

Want better proof? Here's the link to the database at Bristol Dyno. http://www.bristoldyno.com/vehicles/Ford/Mustang/Varin_Keith/ Youll need to DL the run viewer. http://www.bristoldyno.com/programs/RunViewer7.0.1.0.zip

RichV · Feb 10, 2013

Interesting. But there was no aftermarket cam in there? 100% sure? And no portwork to heads or intake?

On the dyno, lean is mean. Also, all my dynosheets are set to Smoothing=5, that one looks to be a 3 or 1. I know the lower Smoothing #s provide higher dyno #s because they record the peaks on the line.

Either way there is no reason you should were running out of fuel with 24# injectors with a stock tune. My race car puts down 250-260 all day long with 13-14:1 A/F using 19# injectors.

Factory freak? Maybe. We had a dude in CMC with a 89 Fox, he made 230rwhp, UDPs was the only mod. Almost 200K miles, he was the original owner of the car. Crappy stock intake, stock heads, stock cam, stock exhaust, etc. I wouldn't beleive that either, 90% of stock Foxes barely make 200rwhp.

Addermk2 · Feb 10, 2013

I never said I was out of fuel. The car was just running lean. Which is why I was easily able to push my AFR's down into the 13.5 range after I got into the map...and 15:1 WOT is not "mean" its ****ing dangerous.

So add in my fueling fixes, which also involved cleaning my MAF... and the timing changes I made, and the car most definitely ran ALOT harder.

And yes, that was a factory long block. virgin heads, OE cam, stock rockers, stock intake wasnt ported... etc.

RichV · Feb 10, 2013

It's strange that you even had to mess with a/f, the stock program should have no issues compensating for a exhaust and a t/b. But hey, that's 1 car. Would be fun to see if that exact power/situation could be duplicated in another.

Your dyno curve looks a little different than my GT40 geared 5.0. Biggest difference is your HP flatlines after 4500rpm, mine drops about 30hp to 5500rpm. Wonder if the t/b is a restriction on my setup. I'm using a stocker, but I can't change it unless it's an OEM part.

5ptSlow · Feb 10, 2013

You can use just about any cam, but most of the guys are right, when you do a setup, take a weekend and do an HCI setup. I have heads and cam if youre interested!

Put a Trickflow Stage 2 in that bad boy! lol.

Addermk2 · Feb 10, 2013

RichV said:
It's strange that you even had to mess with a/f, the stock program should have no issues compensating for a exhaust and a t/b. But hey, that's 1 car. Would be fun to see if that exact power/situation could be duplicated in another.

Your dyno curve looks a little different than my GT40 geared 5.0. Biggest difference is your HP flatlines after 4500rpm, mine drops about 30hp to 5500rpm. Wonder if the t/b is a restriction on my setup. I'm using a stocker, but I can't change it unless it's an OEM part.

Does your class restrict you from swapping to a foxbody intake setup? If it doesnt, you could use a modded explorer TB.

RichV · Feb 10, 2013

I had a 65mm 93 Cobra t/b with a fox intake before I found a SN Cobra intake. I thought I could use the factory STB with the SN intake, but I found out it does not work. The explorer t/b is no good either.

Will a 4.6 t/b work? Or are they too different

Paul · Feb 10, 2013

Addermk2 said:
Generous dyno? Maybe... but that 253hp was enough to get me a 14.02@101mph. Had I not shifted into 4th gear, I wouldve broke 13's.

Generous Dyno? MOST DEFINITELY. The track times and MPH tell the tale. My 135K mile, worn out, oil-burning GT with an Edelbrock intake, throttle body, gears, shorties, catted x-pipe, and mufflers ran 13.9 @ 99, and I guarantee it made nowhere near 250 rwhp.

Paul.

cobra head · Feb 10, 2013

well im glad you asked this ? bc right now im building my 94 cobra ill trll ya what i have im going with a set of trick flow twisted wedge heads 1.7 rockers stk cobra intake E303 cam 70mm tb stk short block has been honed out new piston rings witch was a problem bc i didnt know COBRAS ran a diff piston ring long tubes bbk x pipe and a mac catback im really thinking the build is going to be really good reason im saying is bc the E303 has always worked really well with the stk computer without tuning it not only that the computer is tuned already for the 24 pound injectors so crossing fingers and praying for the best i hopr no later then wed ill be fireing this thing up

Paul · Feb 10, 2013

Spending all that money on parts and not spending the extra $500 for a tune is doing yourself a great disservice. You'll be leaving power and drivability on the table.

Also, there is key on your keyboard between the comma and the forward slash, it's called a period. Learn it. Live it. Love it. Punctuation FTW.

Paul.

cobra head · Feb 11, 2013

i know what it is homie dont worry about it

Addermk2 · Feb 11, 2013

Paul said:
Generous Dyno? MOST DEFINITELY. The track times and MPH tell the tale. My 135K mile, worn out, oil-burning GT with an Edelbrock intake, throttle body, gears, shorties, catted x-pipe, and mufflers ran 13.9 @ 99, and I guarantee it made nowhere near 250 rwhp.

Paul.

I probably should've added that the run was on 3.08 gears and I had a 2.4 60' time.