275 v2 or v3??? - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 22 (permalink) Old 04-04-2009, 10:20 PM Thread Starter
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275 v2 or v3???

Hi! i got my 275 tune 2 weeks ago ) i saw here that there is 2 version of the 275??? v2 and v3, what is the difference between both. how do i know witch one i got??? Thank!
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post #2 of 22 (permalink) Old 04-05-2009, 01:40 AM
 
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You got V3
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post #3 of 22 (permalink) Old 04-05-2009, 02:01 AM Thread Starter
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thank but what is the difference the 2???
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post #4 of 22 (permalink) Old 04-05-2009, 02:28 AM
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One thing that was different is that some trucks has surging problems with V2. My dually surged anytime I ran above 68mph in any kind of weather. Most people only had surging problems during the cold weather. Some are also saying that they thought V2 was a little faster....

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post #5 of 22 (permalink) Old 04-05-2009, 05:44 PM
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v2 has more down low...i still have surge issues anytime i run 40 mph under light throttle...and it's only with the trq converter unlocked

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post #6 of 22 (permalink) Old 04-05-2009, 10:29 PM
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I find major differences on "my" truck between the V2 and the V3.
The 2 is much stronger down low, and the 60-90 mph roll on power is out of control.

2008 F-350
KEM 345 tuned.

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post #7 of 22 (permalink) Old 04-12-2009, 03:15 AM
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I went back to the V2 now and I really dont find a differnece in power, its deffinately different in shifting but I feel to say the V3 seems to run better through the gears.. its so hard to tell without having two trucks but these are my thoughts

V2
Louder at idle
Way dirtier - smokes way more
shifts seem firmer
starts terrible in the cold
Seems to spool up slower off the line
Surges at 2200 rpm


V3
When you "let off" the throttle seems to really bob your head forward especially on cruise
Smokes less
Less boost
Lower EGT's
starts great in the cold (-20c was the coldest I had it in not plugged)
Surges at 1700 rpm, but less than the V2
Shifts better

I have been running it for almost a week and will go back to the V3 tommorrow. I really dont like the "let off" of the V3, but I guess you cant have everything

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post #8 of 22 (permalink) Old 04-12-2009, 02:38 PM
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Maybe different trucks and different intake/exhaust combos offer different results.

V2.
I feel it's far superior in low end throttle response and spool up.
I find the shifting to be way too harsh.
I notice higher boost numbers.
I find it 2-3 mpg better.
Smokes a little more.
Totally different sound at idle.

V3
Mushy pedal feel, very lazy off the line, and that'e enough to make me switch back to the V2.
Much smoother, refined overall tune. I would probably prefer this tune if throttle response wasn't something so important to me.
The only problem, and it's a big one to me, is the "hit your head on the dash" fuel cut off when you lift at highway speed.

Since we know that the idle rail pressure of the V2 is pushed to the max, is there any downside or potential harm being done to the injectors running this kind of pressure?

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post #9 of 22 (permalink) Old 04-12-2009, 02:48 PM
 
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Quote:
Originally Posted by George C View Post
Maybe different trucks and different intake/exhaust combos offer different results.

V2.
I feel it's far superior in low end throttle response and spool up.
I find the shifting to be way too harsh.
I notice higher boost numbers.
I find it 2-3 mpg better.
Smokes a little more.
Totally different sound at idle.

V3
Mushy pedal feel, very lazy off the line, and that'e enough to make me switch back to the V2.
Much smoother, refined overall tune. I would probably prefer this tune if throttle response wasn't something so important to me.
The only problem, and it's a big one to me, is the "hit your head on the dash" fuel cut off when you lift at highway speed.

Since we know that the idle rail pressure of the V2 is pushed to the max, is there any downside or potential harm being done to the injectors running this kind of pressure?


100% agree with the above, exactly how I would describe things....the mpg gain with the V2 is enough for me...well also the fact that the raw un adulterated power off idle is nice...
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post #10 of 22 (permalink) Old 04-13-2009, 01:50 AM
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Is there any way to know what version I have? I received mine in mid Febuary. I would like the V2 based on people have said about it, but Ive riden in sledneck57 truck (I believe he has V3) and liked the EGT's floating around 1400deg under full throttle. With the 250 V1 I could peg the pyro. Scary.

Lets just say not quite stock.
Slower than some. Faster than most.
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