So I installed my Hallman ES boost controller today and every gear except for 5th spikes up no higher than 21psi then goes to 20psi. 5th gear spikes to 23psi for a second then drops to 20psi, according to my Defi D boost gauge. Should I be concerned about this or can I let it slide and be okay?

 

you're fine don't worry

 

enjoy the boost your fine

 

shouldnt it matter on what oct your running?

 

I think everyone here is assuming he's running premium.

 

Yeah but he's in CA... so its only 91oct.

 

Yeah, running 91oct, getting a custom dynoflash in about a week when Al comes out here. Just want to know if anyone else has similar spiking issues.

 

yea u good... i got a turbo xs high performance BC .... and its not flashed just like yours and mine spikes up 24-25 and then drops down to 20,21,22... but ur fine.. no need to worry...!

 

I have same exact setup on 93 octane and experience same spike you are in 5th.
But I am not worried. Tried a slight adjustment down but then you drop to 19PSI and it still spikes. Could be lack of back pressure from running a 3'' exhaust system.

 

im holding at 1.5 bar or 21.75psi. and i have boosted 1.7 bar b4 for i think ur fine.

 

I have the stock exhaust and it does the same thing....

 

That's way too high. The thread originator is fine, but you are not...nor is deadbeatrec or whatever. There's no reason to run that much boost on pump gas, for it only causes you to knock heavily.

 

on a hot day my car spiked to 26.3 psi, my car is still fine but this was on 93 octane

 

like i said .. its bein doin it for over 5 months .. and car is still fine.. i didnt say it holds that amount of boost.. i said its spikes for like 2 seconds and then comes back down .. in 5th gear by redline it holds 21 or 22 .. i know im good..!!!

 

this is why i got rid of the MBC and went with the EBC..........no spikes and no taper