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Info about 4.2L


Discussing Info about 4.2L in the V6 Mustangs Forum. I have read in previous post that the 4.2L v6 is just a better ...

       

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Old May 29th, 2007, 02:27 AM   #1
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Info about 4.2L

I have read in previous post that the 4.2L v6 is just a better engine compared to the 3.8L. Is their a sticky for this somewhere? If not does anyone have the specs on why is it a better engine and is it necessary to forge the internals if I want turbo etc. etc. I know someone knows what they are talking about concerning engines out there. I heard of 3.8L engines not durable enough for turbo and etc. so let me know whats up.
 
Old May 29th, 2007, 02:32 AM   #2
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ill hook you up dude hold on...



SPECIFICATION SHEET



Super Coupe Mustang

Thank you for contacting PrecisionEngine.com.

Please review the following quote and specifications to your custom-built performance longblock:

 3.8L block bored, honed, decked and align honed
 Speedpro® performance camshaft:
o 204/214 @ .050
o .470 lift
o 114 lobe center
 New Durabond® performance cam bearings
 Balanced rotating assembly
o Reground ” 3.75 stroke steel crankshaft
o Resized rods with ARP® rod bolts
o New King® performance bearings
 Speedpro® hypereutectic performance pistons with Molly® rings
o 9.5 to 1 compression ratio
 New Melling® performance timing set
 New Melling® performance high volume oil pump
 Cylinder heads
o 1.90”/1.50” stainless steel valves
o 100 lbs valve springs
o New head bolts
o 3 angle seats
o Bronze guides
o Positive seals
 New push rods and stamped rockers
 New gasket set
 1 year unlimited mileage limited warranty
 Painted Ford Black or Grey with aluminum heads
• Stage1 porting add $250.00 , Stage2 add $450.00
• Oil pan, front cover, balancer and intake available at extra costs.
• Price 1999.95 Exchange or core charge of $300.00 plus shipping

Thank you,
Precision Team
Ken@precisionengine.com
1800 275 7371 x 120

well it kinda worked

if you have more questions i can help
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Back for brotherly love. My thoughts are with you Bubba!! [9-23-08]

Originally Posted by omz
 
Old May 29th, 2007, 02:35 AM   #3
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sorry i didn't read all your post... the thing with the forced induction is our engines can only take so much... you might be able to get about 7 psi out of it safley for a while... now if you get that new engine you can run6-8 psi for about 15k miles after that lookin into a new bottom end would be best

most of the difference in the engines comes from the say that they are built... the 4.2 has better components over stock and with fully ported intakes and great tunning and exhaust you could see 250 horse power naturally aspirated if not more...
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Back for brotherly love. My thoughts are with you Bubba!! [9-23-08]

Originally Posted by omz
 
Old May 29th, 2007, 04:42 AM   #4
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So if i were to get twin turbo my engine wont be able to handle it cause its a 3.8???
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Old May 29th, 2007, 04:59 AM   #5
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it could handle it, if ur runnin like 4psi for each turbo max...any higher and ur gonna start breakin shit
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Originally Posted by Onemanzu
put the shiny thing next to the dudad and get this thingymagigger and connect it to the hoptey dooo and your all good
Originally Posted by TheUNZippee! View Post
And we're done.
Go vote for me for ROTM!

TURBO on 7.2psi
CHECK OUT MY WEBSITE
 
Old May 30th, 2007, 01:09 AM   #6
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OneManzu,
Good lookin out with the info. They should make all of the specs of a 4.2L V6 into a sticky. I didnt understand why on tmaturbo.com their are alot of stock V6's with turbo on them but later some will buy a 4.2L later on. Ford truly makes their money on aftermarket parts dont they?
 
Old May 30th, 2007, 09:29 PM   #7
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if u order an engine from precision (I find em the best for the price) tell them u want to run certain amount of psi and they will forged the engine to handle the psi. a stock motor can handle 7 psi without exploding or w/e
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Old May 31st, 2007, 03:34 AM   #8
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yea the stock motor is pretty stout... well for a big piece of metal that ford threw together... most of those stangs on tma aren't runnin to much over 250-300 horses thats why they are still runnin now the thing is they are puttin a bit of stress on those engines and if they ever decide to change anything they will wear out faster... well faster then there current rate... which is faster then a stock engine

np on the 4.2 thing

and for some reason ken w/ precession is like anti-email... so ima call him tomorrow and see what the deali-o is
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Back for brotherly love. My thoughts are with you Bubba!! [9-23-08]

Originally Posted by omz
 
Old May 31st, 2007, 04:46 AM   #9
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Ken will talk to you if he thinks your not just some random punk kid trying to ask a million question and not buy anything
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Old May 31st, 2007, 04:28 PM   #10
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Hm, Ive been wondering he doesnt respond alot to me either. I asked him for an updated spec sheet with some upgrades added to it all and I just got a "Thanks for choosing us!!" email all over agian. Pfft..
 
Old May 31st, 2007, 07:52 PM   #11
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well give him a call apparently that will do it... i just haven't had time to sit down and talk to him
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Back for brotherly love. My thoughts are with you Bubba!! [9-23-08]

Originally Posted by omz
 
Old June 1st, 2007, 03:25 PM   #12
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This website has a lot of information on what is available to build a 4.2L or 4.3L engine

http://www.supersixmotorsports.com


I'm not sure what precision is putting in for bottom end components to build the engine for about $2K.

Seems like if you want extra power you may need stronger bottom end parts to keep it reliable.
 
Old June 2nd, 2007, 12:42 AM   #13
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question....when the engine is made to the 4.2L what does the 232 change to?
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Originally Posted by Onemanzu
put the shiny thing next to the dudad and get this thingymagigger and connect it to the hoptey dooo and your all good
Originally Posted by TheUNZippee! View Post
And we're done.
Go vote for me for ROTM!

TURBO on 7.2psi
CHECK OUT MY WEBSITE
 
Old June 2nd, 2007, 12:55 AM   #14
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Originally Posted by WLJohnson05
question....when the engine is made to the 4.2L what does the 232 change to?
its still a 232 block. the displacement changes and technically it is a 272. all you really need to do is put a crank from a 4.2 in it and it makes it a 272. But you should also upgrade all the internals.
 
Old June 2nd, 2007, 12:56 AM   #15
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o im gettin precision to build a 4.2 but i was just wondering about the 232, so it would be 272 thas cool
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Originally Posted by Onemanzu
put the shiny thing next to the dudad and get this thingymagigger and connect it to the hoptey dooo and your all good
Originally Posted by TheUNZippee! View Post
And we're done.
Go vote for me for ROTM!

TURBO on 7.2psi
CHECK OUT MY WEBSITE
 
Old June 2nd, 2007, 01:05 AM   #16
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And I can Generally answer questions when it comes to precision engines. I've talked to ken extensively and went over almost every single option he has on his motor.
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Old June 2nd, 2007, 01:10 AM   #17
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Originally Posted by WLJohnson05
o im gettin precision to build a 4.2 but i was just wondering about the 232, so it would be 272 thas cool

yeah. a 4.2 is equivalent to a 272
 
Old June 2nd, 2007, 01:47 AM   #18
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Originally Posted by 97stanger
Originally Posted by WLJohnson05
o im gettin precision to build a 4.2 but i was just wondering about the 232, so it would be 272 thas cool

yeah. a 4.2 is equivalent to a 272
You do know, your wrong again!

a 4.2L would only be a 256
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Selling for friend: Vortech Supercharge kit < 100miles.
 
Old June 2nd, 2007, 01:49 AM   #19
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o god not this again...

how is it calculated?
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Originally Posted by Onemanzu
put the shiny thing next to the dudad and get this thingymagigger and connect it to the hoptey dooo and your all good
Originally Posted by TheUNZippee! View Post
And we're done.
Go vote for me for ROTM!

TURBO on 7.2psi
CHECK OUT MY WEBSITE
 
Old June 2nd, 2007, 01:52 AM   #20
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Originally Posted by WLJohnson05
o god not this again...

how is it calculated?
Well theirs a simple way, and their is the complicated way lol.....

But its 256, what do you mean "o god not this again...." would you rather me correct him or everybody be misinformed again?
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