Speed density Mods

[87lxmustang]

Has anyone installed a mild cam such as an "E" or a trickflow
stage 1 in a speed density car? My current combo includes
Trickflow heads,ported lower with a comp box upper,70mm
throttlebody and spacer,adjustable fuel reg.,offroad H pipe,
3.55's, 1.6 roller rockers. The car dyno'd at 285hp with only
299fp torque. At 2940lbs it's run 12.79 at 109.9 mph with only
a 1.99 60 ft. on drag radials. The air fuel ratio at full throttle
was spot on at 12.5/1 . The driveability now is great and I'm
currently installing a typoon intake to bring up the torque number,s. What i'm concerned about is losing some drivability
with the cam install. Also i'm still running 19lb injectors with fuel
pressure around 53lbs.Obviously at some point I'll have to convert
to mass air but it's fun running fast on speed density.

Any info would be great

[mnstang]

the typhoon is a great idea, i used to have a comp box on a stock lower (mike now has that comp box on his lx), and then went to a typhoon and felt ALOT of power everywhere in the powerband, especially under 3000 rpm it was a huge difference, night and day.
i'd think either one of those cams would be a good choice regardless, even if you had maf. i had the TF stage 1 on the old combo... it is still pretty mild, but very noticeable and if you have some heads and intake (like you do) to take advantage of the cam, it's a very worthwhile thing to do imo. (mike now has my TF 1 cam)
i'd think with the cam and intake you're going to be past 19lb injectors anyway. now i'm not a speed density expert at all, but couldn't you just get some 24lb injectors and lower your fuel pressure? i don't see why that wouldn't work if you tuned the pressure on a dyno?
not much help but i'm sure someone else might chime in too with some better info.
(do you have a better fuel pump in that beast???)

[Roast'em]

Speed density is awesome. It's like the purest form of 5.0 performance because every little thing helps and those cars run hard with little mods. I have no idea what a cam or injectors will do since my old sd cars only made it as far as you with an intake and gears etc. I wouldn't count on it running too well. If I was you I'd get some 4.10s and maybe some better heads. Even with the stock cam that car will haul! shit, it does right now.

[mnstang]

dude rob, he has trickflow heads!

[Roast'em]

oh, duh. For some reason I thought they were stock. Gimme a break I just woke up and I was boozin last night.

[Macs Stang]

i would check out a crower 15511 cam for SD. supposedly that cam is the shit for speed density.

-Tim

[mnstang]

duration at .050'' 219 intake, 224 exhaust.
lift with 1.6 rockers .469'' intake .496'' exhaust
lobe center 114 degrees (that should help for SD)

this is what i could make out from the crower website, but the numbers were really small.

[87lxmustang]

Thanks, I printed a copy off the Crower website.Know where I
can get one that would be less expensive than their online
store? Even an AFM cam is cheaper but they won't tell you the
spec's,only that it will work on speed density cars.

Tim

[Roast'em]

AFM cams are cheaper by 25 bucks. For something as important as a cam, I wouldn't base the decision on price when it's such a small difference.

I'm sure someone on the corral could dig up specs on the AFM for you. I found them for my cam before I bought it.

[87lxmustang]

The price difference was more like 60.00 and I'm always looking
for the best bang for the buck!! But how about it,anyone know
the AFM cam specs for one that will work in a speed density car?

Thanks for the feedback guys!!

Tim

[CaptCrunch]

Keep in mind that the main problem with SD is that it relies heavily on vaccum and pre programed peramters in your ecm. Keep in mind that you can play tricks to fool your ecm into thinking there is more vaccum so it will read and then final tune it with the chip. You can also get the whole works to run on just the tps, but it is rather tricky and will require a fair amount of work to tune it. You will need (or know someone who can) equipemt to see what is happening and equipment to make chips. At that point you are probably better off switching to a standalone or to a MAF system, but regardless it can be done.

The MAF EEC-IV is a nice system to use for performance and does very well with power as long as you can get an MAF calibrated for your needs and that will not be a major restriction in the induction.

[Roast'em]

Originally posted by 87lxmustang
anyone know the AFM cam specs for one that will work in a speed density car?

https://www.corral.net

5.0/5.8 tech forums, do a search for speed density cams and there are endless topics about the crower or afm cam. It sucks that we can't help but that site is just full of hardcore 5.0 techies. It's impossible to match a resource like the corral.