Intermittent Performance

[No Crust Racing]

Yes, can log with Haltech, it will also flash the engine light. 

Also have a wideband so if it was lean it will know/flag/put it into engine protection and throw codes etc. 

[turb33gtst]

Cool

My Knock sensor count climbs in hot weather at low rpms and boost is reduced

but when its cool like today count is 0 and boost kicks like a mule and car breaks traction in 1st , 2nd & 3rd.

 

[djvoodoo]

Interesting topic re: Map sensor. I'm running -9's (GT-SS), on a Vipec. My tuner (DVS Jez) also tuned 'around' the 3 Map sensor. I hit 24psi boost as well from 4-5000rpm before it backs down to 21psi up until 8K redline.

[No Crust Racing]

I don't think it's anything new to tune beyond sensors, on the dyno, but I can understand why it's less than ideal. 

It was a last minute decision while we were there, but I should have pulled my finger out and bought the proper sensor afterwards. 

[r32-25t]

14 minutes ago, djvoodoo said:

Interesting topic re: Map sensor. I'm running -9's (GT-SS), on a Vipec. My tuner (DVS Jez) also tuned 'around' the 3 Map sensor. I hit 24psi boost as well from 4-5000rpm before it backs down to 21psi up until 8K redline.

A 3 bar map sensor will read up to 29psi 

[djvoodoo]

12 minutes ago, r32-25t said:

A 3 bar map sensor will read up to 29psi 

Fair enough. Mabee i was told incorrect info. Someone mentioned to me that 3 bar absolute is not the actual same as total "boost". And just looking up my Vipec, it's 2.5 bar map sensor or 22ps "boost"i?

Could be completely wrong though.

[Piggaz]

3 bar absolute is 2 bar of boost

2.5 bar absolute is 1.5 bar of boost. You take away 1 bar for the "1 bar" of atmospheric pressure.

[djvoodoo]

Yep, Vipec V44 plugin is 2.5 bar onboard, my bad.

So technically, it's been tuned 'around' the extra 2 psi in midrange for me.

Edited March 21, 2017 by djvoodoo

[No Crust Racing]

Yep, pretty much same as Haltech.

Can "see" 21psi above atmospheric.

[Dose Pipe Sutututu]

then your car hits 2 bar, ecu has no idea boom.

[No Crust Racing]

Wouldn't the wideband see it leaning out - and react accordingly?

 

 

 

 

[Hadouken]

You need more gauges

[No Crust Racing]

I've ordered the Haltech barometer.

[Dose Pipe Sutututu]

2 hours ago, ActionDan said:

Wouldn't the wideband see it leaning out - and react accordingly?

 

 

 

 

but how would your wideband determine you've over boosting? or that you're running way to much timing?

And how would your wideband and or your map sensor determine you've over boosted and cut fuel/igniting to your motor?

Pointless having engine protection that's not protecting a basic thing like exceeding load, in this case boost. 

[No Crust Racing]

I got you, will put an order in tomorrrow.

[GTSBoy]

10 hours ago, ActionDan said:

I've seen videos, but I've never personally fisted a pussy..

fisted pussy <> punched cat

Although....the resulting damage is probably similar

[Lithium]

10 hours ago, ActionDan said:

I got you, will put an order in tomorrrow.

Let us know how you get on.  While there is a good chance that it is to do with that, there is no guarantee BUT a MAP sensor that suits what you are doing is really a must have imho so not wasted money no matter what way you cut it.    Obviously it'll need remapping to get rid of the guess work on the 250kpa load range - good luck!

[No Crust Racing]

It'll need a retune either way for the Cams. 

As an aside, how do you bench test BOVs? 

[Hadouken]

Didn't you check for boost leaks already?

[No Crust Racing]

On 3/20/2017 at 6:55 PM, ActionDan said:

Any easy way to test them? Boost leak test doesn't help as any leakage stays in the intake so total pressure remains the same.
 

My BOV's are plumbed back. Leakage past the BOV just ends up back on the hot side of the motor. Total pressure remains the same and given the noises involved in pressuring the system, hard to hear if the BOV is unseating. 



 

Edited March 21, 2017 by ActionDan