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6.4L Performance Parts Discussion What has or has not worked for you?

 
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post #1 of 6 Old 02-11-2010, 05:31 PM Thread Starter
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spartan tech question

Hey, I have been running the 275v3 and 275 v4. The v4 runs perfect but uses 10 psi more boost at any speed than the v3. The v4 also gets noticeably better gas mileage. Is the excessive boost of the v4 over the v3 harder on the engine during normal driving. I also tow a very light utility trailer from time to time and that requires more boost on the v4. Around 30 psi at times. Is this OK?
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post #2 of 6 Old 02-11-2010, 10:01 PM
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The boost will do no harm. The stock calibrations at times run more boost then the v4, and if its getting better gas mileage I would use it. Hope this answers your question!
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post #3 of 6 Old 02-11-2010, 11:08 PM
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Originally Posted by SpartanTechII View Post
The boost will do no harm. The stock calibrations at times run more boost then the v4, and if its getting better gas mileage I would use it. Hope this answers your question!
who would take the time to pose as somebody from spartan? just to answer this one question...

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post #4 of 6 Old 02-12-2010, 05:49 AM
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post #5 of 6 Old 02-12-2010, 08:55 AM
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My bad I thought it was kind of suspicious because the accound had just been created and there was only one post.

2008 F-250 Lariat 4x4 Silver

Mods Engine:
Spartan 310, 4in downpipe, 4in flo-pro exhaust, AFE intake, TCM, 3in CAC pipe

Transmission: Fully built Suncoast

Suspension:
Carli 4.5" suspension system, King Coilover shocks, rear Deaver spring pack, Xd Moster wheels, 35" Toyo Mt's

Exterior:
Buckstop Bumper, Warn 16.5 Ti winch, Warn HID lights, HID headlights, Backrack, weatherguard toolbox, Twin Viar 480C compressors, B&W turnover ball hitch
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post #6 of 6 Old 02-13-2010, 07:04 AM Thread Starter
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Yes, I do see that on the lower tunes the boost is higher while driving normal. The 275 v3 has quicker response on bottom end than the v4, but the v4 has great power on mid to top end. V3 seems to pull light loads a bit better than the v4. Why is that? Thanks.
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