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Topic: 1998 Explorer engine questions..... (Read 5398 times) previous topic - next topic

1998 Explorer engine questions.....

Reply #75 –
Tuning via regulator CAN be effective provided you have an idea of what you are doing and enough pump to feed the injectors at higher pressure.  That being said, I would not go over 55 PSI on an injector.  Is running a 24 pound injector @ 40 PSI better than a 19 @ 60 PSI?
Absolutely.

It's weird.  This and another forum seem to be revisiting a lot of touched-upon topics as of late.  Not a bad thing and I'm not bitching about it.  Just weird how it's both sites......Perhaps the time of year??
-- 05 Mustang GT-Whipplecharged !!
--87 5.0 Trick Flow Heads & Intake - Custom Cam - Many other goodies...3100Lbs...Low12's!

1998 Explorer engine questions.....

Reply #76 –
I will eventually,as funds come available,get a Cobra ECM,Mass Air sensor and 24# injectors (do it as a matching set,and I should be set up pretty good).I'm hoping to be pushing the limits for the 19# injectors.What is their limit by the way?I was thinking 285-300 HP for some reason.Anyone?
'88 Sport--T-5,MGW shifter,Trick Flow R intake,Ed Curtis cam,Trick Flow heads,Scorpion rockers,75mm Accufab t-body,3G,mini starter,Taurus fan,BBK long tube headers,O/R H-Pipe, Flowamaster Super 44's, deep and deeper Cobra R wheels, Mass Air and 24's,8.8 with 3.73's,140 mph speedo,Mach 1 chin spoiler,SN-95 springs,CHE control arms,aluminum drive shaft and a lot more..

1998 Explorer engine questions.....

Reply #77 –
My 19's max out at 4500-5000 iirc with the stock A9P tune (which shoots for 11.5:1 A/F). This is a gt40p headed engine with the '89 HO Cam. Should be just over 300fwhp and from everything I've read. At max duty cycle, I'd think lower 300's would be possible with a tune. I don't like running my 19's at 99% duty cycle though...

My lower gt40 intake appears to have had some light porting done by someone in the past. Binary Editor keeps calculating/guessing that I'm around 320-330hp at the crank on every datalog. I haven't dyno'd it yet as it's a waste of money since my under hood plans are not yet complete.

Edit:
Here is a sample area of a datalog when the fuel injectors are being told to go all out. You can base your plans on this - your setup should flow a little more. My transmission begins to shift at 5k so I don't have datalogs going higher. While I didn't have the wideband hooked up, the standard o2's always read rich at WOT.
1988 Thunderbird Sport

1998 Explorer engine questions.....

Reply #78 –
I'm stuck with 19's for now.It'll be fine until I gather the funds or find a wealthy sponsor.......yeah,right.LOL.I'll start gathering what I can when I can.The money I can make selling my computer,Mass Air meter/sensor/injectors will help get some money back once the swap is done (to 24's).It won't get all my money back,but,every little bit helps.
'88 Sport--T-5,MGW shifter,Trick Flow R intake,Ed Curtis cam,Trick Flow heads,Scorpion rockers,75mm Accufab t-body,3G,mini starter,Taurus fan,BBK long tube headers,O/R H-Pipe, Flowamaster Super 44's, deep and deeper Cobra R wheels, Mass Air and 24's,8.8 with 3.73's,140 mph speedo,Mach 1 chin spoiler,SN-95 springs,CHE control arms,aluminum drive shaft and a lot more..

1998 Explorer engine questions.....

Reply #79 –
I'm sure you already knew you need more than 19's. 24's would get you to 80% duty cycle with the same power output. Because nobody recommends using it over 80, especially as the fuel injectors age and their capacity/efficiency drops, 24's may not be enough if you plan on having closer to 400hp at the crank. At this point, I'd be looking at 30's (although a bit overkill). 24's would work but you'd be maxing them out. Decide your final goal and buy parts once.

I have no idea what you'll be making with that combo though. The heads are what will really limit the combo. A lot depends on the porting/cleanup that you have being done but I doubt it'll free up much for the P's design. I think it's safe to estimate you'll be seeing around or just over 350hp, giving you a 15% safety margin with 24lb injectors.
1988 Thunderbird Sport

1998 Explorer engine questions.....

Reply #80 –
I'll go with 24's and probably be fine.99% of all my driving is just to work,picking up my little man from school,then home.For the once in a great while tires killing,I think they'll do.LOL.

As far as the heads,when i pick them up,I'll post the numbers here for everyone to judge for themselves.I'm hoping for good things.
'88 Sport--T-5,MGW shifter,Trick Flow R intake,Ed Curtis cam,Trick Flow heads,Scorpion rockers,75mm Accufab t-body,3G,mini starter,Taurus fan,BBK long tube headers,O/R H-Pipe, Flowamaster Super 44's, deep and deeper Cobra R wheels, Mass Air and 24's,8.8 with 3.73's,140 mph speedo,Mach 1 chin spoiler,SN-95 springs,CHE control arms,aluminum drive shaft and a lot more..

1998 Explorer engine questions.....

Reply #81 –
I have a set of 24s sitting in the garage. I haven't bought a MAF so I can put them on because my trans is fubar and I'm going to have it rebuilt in the spring. I figure:

1. If I put on the 24s before the trans I couldn't tell how well they work cause then I'd blow up the trans.

2. I can't go full throttle with the trans now anyways as it slips:hick:

Besides my AOD shifts at 4800 rpm so I'm still at about 99% duty cycle so I've got some room :rollin:
88 Thunderbird LX: 306, Edelbrock Performer heads, Comp 266HR cam, Edelbrock Performer RPM intake, bunch of other stuff.

1998 Explorer engine questions.....

Reply #82 –
I'm hitting the boneyard tomorrow morning.I may find some 24's there.Sometimes they have some taurus's there with the Duratech engine.I'll need two of those cars though.
'88 Sport--T-5,MGW shifter,Trick Flow R intake,Ed Curtis cam,Trick Flow heads,Scorpion rockers,75mm Accufab t-body,3G,mini starter,Taurus fan,BBK long tube headers,O/R H-Pipe, Flowamaster Super 44's, deep and deeper Cobra R wheels, Mass Air and 24's,8.8 with 3.73's,140 mph speedo,Mach 1 chin spoiler,SN-95 springs,CHE control arms,aluminum drive shaft and a lot more..

1998 Explorer engine questions.....

Reply #83 –
24's can also be found in some BMW's....my friends 94 325is came with them
Currently Birdless but never Foxless

86 Mustang GT

1998 Explorer engine questions.....

Reply #84 –
Not many of those in the yards around here.
'88 Sport--T-5,MGW shifter,Trick Flow R intake,Ed Curtis cam,Trick Flow heads,Scorpion rockers,75mm Accufab t-body,3G,mini starter,Taurus fan,BBK long tube headers,O/R H-Pipe, Flowamaster Super 44's, deep and deeper Cobra R wheels, Mass Air and 24's,8.8 with 3.73's,140 mph speedo,Mach 1 chin spoiler,SN-95 springs,CHE control arms,aluminum drive shaft and a lot more..