dozer
New member
JD you've got me motivated! 71 arrives tuesday!
A little update from me
- Thread starter jdgleason
- Start date
On the EBP, that would put you around 70. For DD (non-competition) truck with stock valvetrain, would you agree that 70 PSI (84 absolute) is the very max to push it to?
jdgleason
Active member
I'll have to check... I don't know have the sheets in front of me
jdgleason
Active member
84-85 absolute is as far as I would go without a gate.
STROKIN N STYLE
Moderator
Thank you for pressuring me to spend money on a truck I was going to leave alone!
sent from somewhere in the country
sent from somewhere in the country
Ipkyss
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I am wondering why it is so high? I know Jeff's truck is lower than that. And the highest I ever see at any rpm/ throttle position is 55-56 (55+14=69 total). This is on the Spartan 310. I have my voice alert at 60psi and it has not gone off since swaping to the 71mm.
jdgleason
Active member
Altitude should play a big factor in that. My turbo has to work hard to move that much air.
Dustball8504
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Yeah mine with Xrace is almost 1:1. Still waiting on Matt to send me the tunes with the new serial number in them so I can compare his race to your numbers also.
Dustball8504
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Mine doesn't.
Ipkyss
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I always forget about altitude... I think I am at about 400ft. I actually think the highest I have been is around 2000ft. One pass in PA and one in VT.
Around 4-5000ft on my sled. After about 3000ft it started to run horrible...
I am at about 800 ft. I have my defuel set at 1350 and have never been able to hit that using H&S. On the H&S 250 or 300 with Low Boost Fueling set 1 or above I see 1:1 up to about 35 PSI of boost, but then at higher RPMs/Boost, the EBP starts to take off and I can get the EBP to 70 if I don't let off. That is the only parameter that I really have to watch. I suspect the programming is why I see this, but I guess the ported intake manny, 6.0 exhaust manny, or up pipes could be a factor. Right now, I am just waiting to see if Matt or Eric will offer any programs for the H&S.
jdgleason
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It doesn't.
Ipkyss
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Thats just because you have the option to monitor it with or without amosopheric pressure. I don't think any other monitor does? I like without as it makes more sense to me when you are watching it next to boost.
And if it matters. Which I can't come up with any practical reason why it would. My EBP sensor is in the driverside exhaust manifold.
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I'm sure the cf was high , ie 20% plus. Typically hallers reads a bit high corrected , but I don't believe the numbers are skewed a crazy amount as track times aren't very far off. I believe the peak number is a good bit high though. Perfect example , my truck dyno'd here on a dynojet at sea level uncorrected and did 589 with high powers , but ran 12.48 @ 107 at 8350. Trap speed said 675 which I believe to be somewhat correct. The truck dyno'd 723 on hallers, same setup only two weeks later. I think JD's increases speak for themselves. Improvement is huge for cost and labor. Great fricken mod no doubt about it.
With or without barometric pressure doesnt matter as long as you remember to subtract it. H&S doesnt include barometric.
strokin08
New member
Hey JD, if I missed it somewhere my bad but would you still say with this setup a wastegate is not needed?
Jeff@Spartan
New member
If you're reading without barometric, you're reading EBP desired. That isn't the actual number you're seeing. It's desired, meaning that is what the computer wants to see. At some points it's spot on and at other points it's off. Reading absolute and doing the math is the best way to do it.
