~40 PSI Boost - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 11 (permalink) Old 02-15-2010, 07:50 PM Thread Starter
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Question ~40 PSI Boost

Is it unusual for the Spartan 150 no-DPF tune to reach approx. 40 PSI? From a stop, not hammer it, just steady fast acceleration I hit it.

I can't imagine the 210 or higher

How much boost pressure can the heads handle consistently?

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2008 Silver CC FX4
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post #2 of 11 (permalink) Old 02-15-2010, 09:13 PM
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Some of the smaller tunes see high boost numbers, no worries. I want to say the 275 and 310 see over 45, some trucks report into the 50's.

'10 F350, CCLB, SRW, 4x4, 6 speed, 2.5" AutoSpring front leveling pucks, 37 x 13.50 x 18 Toyo's, 18 x 9 XD Diesel's, Road Armors front/rear

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post #3 of 11 (permalink) Old 02-15-2010, 10:21 PM
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shouldnt be a problem considering that the Job 1 builds used to make 42-45psi stock

Lets just say not quite stock.
Slower than some. Faster than most.
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2008 King Ranch/Harley mix. Spartan tuned. Elite studs, Cobbs EGR delete plates. FabTech 6" 4 link with dual 2.25" remote shocks. 18" 778 Monsters 35-12.5-18 Toyo MT's DDM 35w HID's 6000K hi/lo and fogs.
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post #4 of 11 (permalink) Old 02-15-2010, 10:32 PM
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i've been wondering that myself, ...how much boost is too much. when i run the 275 i can see 50 psi easy, i try not to go much over that and usually see it when excelerating to pass without hitting it hard enough to cause the to kick down.
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post #5 of 11 (permalink) Old 02-15-2010, 11:10 PM Thread Starter
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I'm trying to be cautious, I don't know if too much boost equates to blowing head gaskets, lifting the heads, blowing up my IC or boots. The problem is I like what I felt when the truck took off - it's addicting - but I don't want to over do it. Maybe the tunes have protection from over boost.

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post #6 of 11 (permalink) Old 02-16-2010, 03:48 AM
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you'll be a-ok

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post #7 of 11 (permalink) Old 02-16-2010, 08:10 PM
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I have heard that before and it seem quite a few trycks with the 275/310 are starting to have a some problems..

is there a way to figure it out? A smart guy should be able to do the math and see how much force is being put on the heads? (and thats not me BTW)

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post #8 of 11 (permalink) Old 02-16-2010, 08:45 PM
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Really, there is a thread discussing how many miles people have put on their trucks with the tunes...

Most were gettin quite a bit of mileage out of them

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post #9 of 11 (permalink) Old 02-16-2010, 09:27 PM
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I think that the issues arising with the 275 and 310 are a result of colder temps, winter fuel, and there being many more customers out there now as opposed to last year. REMEMBER THIS. The 275 and 310 are not ment as a DD tune they are race tunes... Not saying it cant be done. I after all am running the 275 all the time. But. I also have studs in. 275 and 310 over factory RWHP is alot to ask of an engine with stock components. When driven with vim and vigor. Most vendors are now suggesting studs, EGR delete, waste gate and BOV's for reliability with the 275/310 combo.

The 210 and under on the other hand seem to be a much gentler tune set up when it comes to every day driving. Throttle responce, tip in, and rail pressure are at a more livable level for long term use. I wouldnt be worried about running the 210 and under daily with an unmodified truck. I have seen it in the past that it's not how much hp a engine makes that is an issue with reliability. The key factor is HOW it makes it hp. Weather it comes on like a stabbed rat or is more lineal in the ramp up.

It's all in how you drive it long term. Everything mechanical has its limits.

Lets just say not quite stock.
Slower than some. Faster than most.
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Last edited by forcefed6.4ford; 02-16-2010 at 09:33 PM.
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post #10 of 11 (permalink) Old 02-16-2010, 10:11 PM
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Like Forcefed said its the way its driven also but hitting 50 psi on a REGULAR basis cant be a good thing on stock stuff. I am running the 250 and its seems to be a nice tune but the EGTs seem to get hot when pushing it hard.

But still I think there should be a way to figure out the cylinder pressure at say 50psi and see how much force is being produced

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