If I get my intake, heads and all that other stuff ported... i mean everything ported, how much hp gains will i see with my 4.2?

i ported my stock throttle body and i notice just a tad bit more passing power when i'm going 50+mph... and also better throttle response.

help me out guys...

 

Tallywacker, Go over to the forums at
www.v6power.com and ask them about it.Alot of the guys over there do the porting thing to their 3.8s( they share the same block/w the 4.2) to get a good idea about how much to expect you can also look at the kenny brown 4.2 liter mustang. I am thinking it was pushing out 245hp(with all the parts ported & polished)> That was without a chip that has these mods programmed in it.With a chip it should put out at least 260 probably more but thats a conservative estimate.Hope this helps.

 

Yes, I would recommend going over to V6power and asking them, but do not let them know you are from here.

I have seen a member get his post locked down beacuse he let them know he was from a truck board. For some reason they dont like cross posting from a truck board to a mustang board by us, but it is ok for them to cross post web boards. I am a registered member of the board over there and they do heve some great ideas.

Example- http://www.v6power.com/ubb/Forum1/HTML/001214.html

[This message has been edited by f150freak (edited 02-22-2001).]

 

haha that was me lol

I double posted and the moderator jumped right in. yeah they lock down alot of people's threads because they want to keep all the forums in order, they have nothing against F150's.. trust me, they are very interested in knowing what can be done to our engines

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97 F150 XLT: Two-Tone Green and Tan,V6 4.2L auto 4X4, 3.55 gears
MODS :Airaid FIPK, Superchip, Ravin Z55 exhaust SI/SO
GOODIES: 12 disk cd changer, jvc 4ch 560watt poweramp, Bazooka tube, Tinted Back

 

so were talking around 40 hp if i get it all done...

 

Quote:

<font face="Verdana, Arial" size="2">Originally posted by f150freak:
Yes, I would recommend going over to V6power and asking them, but do not let them know you are from here.

I have seen a member get his post locked down beacuse he let them know he was from a truck board. For some reason they dont like cross posting from a truck board to a mustang board by us, but it is ok for them to cross post web boards. I am a registered member of the board over there and they do heve some great ideas. </font>

Huh? We don't have anything against F150 V6'ers... I'd like to see a few more visit. We do run pretty tight on where post go, but unless the server eats the post, all we do is transfer them to the right forum. I would NEVER lock a thread cause it was from a someone that doesn't have a Mustang

I like the 4.2's so much, I'm putting one in my stang.

As far as port and polishing, I'm working on a set from a 4.2 right now. The main areas to focus on our the exhaust side- alot can be gain from opening the exhaust port up. Also some work on the bowl. The intake ports, I just polish up and round the bends down.

Steve
Engine Moderator- V6Power

[This message has been edited by SteveC (edited 02-22-2001).]

 

Tallywacker,ya somewhere in that neighborhood but it will turn into quite an involved project.Ever pulled, the heads, upper and lower intake off. Just by looking at them, it would not be my idea of fun.If you would like to avoid downtime, there are a couple of v-6 mustang sites that sell our parts already ported and polished,One even offers extrude honing for our upper intake.
www.rpm-mustangs.com
www.supersixmotorsports.com
to name a few.The folks there are more than happy to answer any questions you have.
As for v6 power bein unfriendly to f150 owners, I find that hard to believe.They just like to keep the site super organized, with all posts in the proper areas, steve(our webmaster) has kinda spoiled us by not moving posts or locking them down, unless absolutley necassary.

[This message has been edited by lightningcrashz (edited 02-22-2001).]

 

yep, those sites Lightning has posted above have packages where they will do the p&p, ya just gotta get your truck there I guess lol

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97 F150 XLT: Two-Tone Green and Tan,V6 4.2L auto 4X4, 3.55 gears
MODS:Airaid FIPK, Superchip, Ravin Z55 exhaust SI/SO
GOODIES:12 disk cd changer, jvc 4ch 560watt poweramp, Bazooka tube, Boston Acoustic 5x9's, Tinted Back.. nice ride!

 

well, I called some shops around here and there was one shop who said they did one 4.2 and thy got like a 45-50 hp gain. They want to charge me $900 for porting and polishing the lower and upper intake, heads, throttle body(even though i've done it) and stock headers. They also said it would take 5 days to do.

If i get this done, i would have around 270hp with my chip and filter...

Should i???

 

Be careful, the Fuel injectors are going to probably hold you back past 245-250 horsepower. I believe the calculations have been done on here many times, but, the 19lb injectors make 80% of capacity at 245 Horsepower. You can push them harder with some reprograming and a different fuel ragulator (dang, forgot what its really called) but, you'll waste gas and may have emissions problems.

With a chip, K&N, and porting/polishing, you should make about 255-260 at the flywheel, if everything else is in optimal condition. A nice match to that would be a Gibson Swept-side and a K&N (or other brand) FIPK and headers. Send your superchip back to be reprogrammed for your modifications, and get 24lb injectors. Doing the math...

Stock 4.2 = 205
Porting and polishing + 40
FIPK +15
Exhaust +10
Chip +25
Headers +15
all mods together = +105 HP
subtract efficiency modifier of 20% = -21
Final power output = 289HP

And that if, and only if, everything else is in excelent condition and you change the injectors. If you don't change the injectors, I doubt you will make it past 265 at the flywheel, since you will start to run extremely lean. If you really want to make it to 300 HP, try a power-pulley for your accessories and a light-weight synthetic oil. You might just see 300 at the flywheel, and 235 or so at the rear wheels. Get yourself a few kills on some 5.4L V8s that aren't careful.

Oh, I hope you've got the automatic instead of the stick. I would likely worry about a stick at those power levels. Heck, if you're feeling really loose with your money, get the supercharger kit that's just being released for it, heck, with the other mods, you could possibley hit 350~375 Horse and 300 at the rear wheels.

Course, I still don't think you'll ever match the 5.4 in torque, though. Unless you did a rebuild with using a Roots style blower in mind.

 

900 bucks, thats not bad, if you have something else to drive while the motor is being worked over. With all this porting&polishing gasket matching is a must do.Probaly should have them do some bowl work on your heads while they have it ripped apartAre you aware Jba is releasing headers for our motor within a month?I have seen dynos of a 3.8 that had all this work done and the hp and torque are much improved in the lower end of the rpms.One more thing to consider is a cam. To take full advantage of the porting on the exhaust side, a more radical cam that holds the exhuast valves open a little longer is needed. The websites i mentioned earlier in the thread have those also ( no I don't work for them, I am just impressed by what they can do w/ a v-6).Nola ford guy was right about the injectors to support these power levels you would need the 24lb variety. Most likely you wouldn't need an fmu(is this what you were talking about Nola?) unless you decided to strap the blower on after these mods.Thee transmision will be a weak point, auto or stick it would fail sooner or later with that kinda power running through it.You would definately want to get you chip custom burned also.You would get more than the standard 25hp with the custom burn(how much more I don't know). My hp estimate(without the blower) is somewhere isn the neighborhood of 280 at the crank( ok its not mine,but thats what supersix motorsports said it would be when I was reasearching this out-I just need to find the $$ to do it).

 

I suspect that the tranny would hold up under the mods as long as the torque numbers don't go past 300 lbs. Since the 4.2 starts at 250, that's not so far away. However, none of these mods add displacement, so, the torqe numbers will be slow to rise. The chip (with custom programming for all the other mods) would probably push the torque to about 275~280. The exhaust might add another 5 lbs. So, it all depends on if a cam swap is done, I guess. Cams can be ground to take better advantage of breathing modifications while still keeping balance in the engine. However, cans can be ground with more emphasis on torque and where it comes in. With a well ground cam, he could easily push the torque past 300, but, the top end would definitely take a bit of a hit. All in all, I suspect that, unless he got a roots type blower, the 4R70 would hold up fine. The supercharger kit that is being discussed for this motor on other threads is a different type, and really doesn't add lots of torque. However, a supercharger of any type coupled with those other mods would definitely have me wanting to either beef up my current auto, or looking for a stronger one from an F250 (4R100?) A standard, if properly handled, has the potential to hold more power than Ford rates it for, however, one slip up and you could be looking for peices of it scattered across the road.

Yes, an FMU is what I was thinking. Its H3LL when you get old

 

WOW! Thanks NOLA and Lightning...

You both have given me some things to think about. I knew I would have to upgrade to at least 24lb. injectors, and was thinking on the gasket matching(which now i'll get done). I do have an automatic; I'm placing my order for an air force one fipk later this week and I will more than likely add the exhaust last(to make people think twice about a quite v6). After the fipk i'm going to get a mas air flow(which one is good??), then headers.

I'm now thinking about having the cam grounded so i have a little bit more torque at the bottom end. I will also send my chip off for custom program after the injectors, cam work, port/polish, MAF, and headers. I will keep my mods posted as i get to them.

thanks for excellent info guys and by helping me decide what to spend my tax return cash on

 

Make sure you keep careful records on just what mods you've done, and, most importantly, the exact way you have your cam ground. That will likely be very important information for SC when they do your chip. Unless you have a local distributor, look on the "computer chips" forum and get in contact with Mike T. He will tell you what you need, ask you for the relevant information, and probably give you all the help you need.

As for the MAF, I haven't seen anyone here really give them a raving thumbs up yet. Granted, most haven't done the breathing work you have, but, in the end, you still may not see much from chainging it. Mike could better answer this question than I. Also, remember to tell SC about whatever MAF you go with. Without custom programing, your mixtres will be off. With custom programming, you should actually see a small performance gain.

 

maf,I agree with nola, there isn't any clear cut best brand out there. MOre than likely, you will need to have this mod burned in your chip.All this airflow work and then the maf and you could be running lean, and thats real healthy for a motor.
Do you have access to a dyno? It would be very interesting to see the exact hp gains every step of the way.If not be sure to let us know what the seat of you pants tells you.