I have a 3.0 1992 Aerostar. This is the old bulletproof Vulcan pushrod engine. Had the timing set up (actually right on spec) and it would spark knock, so I ran mid grade fuel. Then I retarded the timing 4 degrees from spec and it runs on regular with out knocking. Well the difference is night and day in performance. It's a real dog now, but was somewhat peppy. So my suggestion is advance the timing a bit and run higher octane. See if that does anything. Otherwise the best way to increase power short of a blower, is go get a 4.0 V6 IMHO.
Get a performance muffler to free up a little bit of power. A chip would help, but will require premium fuel (not a problem really, unless you are tight on cash), and most of all I bet a change to the rear end gear would help a lot. Probably have a 3.73 rear end. Not sure what would be best, but at least 4.10, but somethin on the order of 4.50 would probably be better (not sure can get).
I suggest the gear because once the Aerostar 3.0 is rolling about 20 mph, matting the pedal usually gets a pretty decent response as she screams her way on up to the mid 5000s. It's out of the hole where these things are the real dogs and a higher number (lower ratio) rear gear would help that immensely.
You could "re-gear" by getting smaller diameter tires which has the advantage of lowering the Aero for better handling. Thing is, those 14 inch wheels are an anachronism. Hard to find tires for it.
mediaman67, On my Aerostar you loosen one screw and turn the distributor. I didn't do it because I couldn't get the screw loose. So I took it in to the shop and they did it. It was right on spec they said, but since it was pinging pretty bad (unless I used better than 89 octane), I had them retard it. They retarded 4 degrees and now it runs fine on 87 octane with no hint of a ping.
I don't know the effect on the life of your engine. I heard you can get ping that is not audible and it potentially can be damaging. But they do make computer chips for various engines that advance the timing for perormance. As I understand it, the computer chips also require higher octane.
I am thinking it might be worth it to put the timing back to spec and run high octane just to make the thing peppier.
Ideally I wish the rear end would go out so I can get a lower gear, like 4:10, instead of the 3.73 that's in it. That, I think, would make it GO!
well i never changed the timing in my aero but i changed the cps in my ranger and checked the timing and it was right about 10 btdc and i just used a timing gun... theres a lil mark on the balancer thing for tdc so i just put chalk on the and with the light it was hitting about 2 teeth btdc which is 12 degrees... hope that helps oh on mine tdc was the 6th tooth, after the missing tooth when i was on compression stroke to get it close....
oh and id go with the underdrive crank pulley
Last edited by bluedevil3758; 01-24-2008 at 04:32 PM.
I found a good amount of power just by opening up the intake and exhaust. Unlike others, I actually went to taller gears (from 3.75 to 3.27), and I gained about 3-5 mpg highway, and still have good takeoff. Actually feels rather sporty now, and will go 70 mph in 3rd gear. If you have an automatic though, I'm afraid it's hopeless.
cheapest power adder p&p all the way and tho not street legal but nice and loud take off your cats ( at 55mph and with a little gooseing you shoot flame :P (not good for motor but you can always bolt them back on)get a air intake good exhaust and your set and if you wanna take it a step further you can get rollerrockers 1.7.1 from tom i got stage 2 heads a set of headers full p&p ( converted my slushbox to a 5speed ( must if you add rollers or you will burn your trany in a week!)( and tho it dose almost nothing ( im pretty sure it just set me back 50 bucks i use zmax in mobil1
then down the road if you wanna go further got on CL and look around you can normaly find a ranger 91 to uhh 94? that has the 3.0 in it that the tranny went that you can pick up for 2-500 and rip the motor and scrap the truck ( or keep it and trow a 351W in it bwaahaha ) and get a stroker kit heads highlift cam and with alittle modification you can use a 96/98 upper intake and get a bigger tb with a spacer p&p then ya can get ( not ure where but i ave seen it) a turbo for it small my buddy got one for his 4 banger ripped it right off a svo mustang he found in a scrap yard but 5-15psi biger injectors ..... and this is getting costly............ but!!!! you do all that to the motor you go out of the doner truck with stage 2 heads from tom and the rollers 1.7.1's then when its all done ( will take a while) just slide it in bolt it up run a becool radiator use a oilfilter relocator oil cooler good gears in the rear ( i run 4.10s) and your set ( and you wife might kill you) but with maybe a 75 shot you can run ...11-13's in the 1/4 and you would be looking at ..... well close to 270-300? witch in a 91 ranger at 3,128 lbs and say 300hp like 200and somthing per ton.... not bad
I'm alot crazier than i look ... now that is scary
92 explorer, 00 mustang
Last edited by chillmiller; 06-08-2009 at 04:59 PM.
Reason: missed some info
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