baseline 93oct we measure in KW in OZ so its 355hp it should be 490hp at 33psi
e85 fic2150
sorry dont know how to flip the image

 

i just checked my radiator for any bubbling none visible. should i do a leak down test? because that is a big loss in hp and my tuner is stumped. he believes it must be mechanical? i dont think i have a boost leak anywhere because its boosting fine except up top

 

Did you test the coolant pressure under full load?

No of course not.

You need a pressure gauge on the cooling system to do so.




But it won't be the only thing wrong, it never is.

 

But it won't be the only thing wrong, it never is.

True True it started with the heater core leaking coolant ..fixed.. ==> then water pump leak went.. ==> might as well do my major service at the time too... now head gasket??? i dont think thats too bad of a job... i just looked it up my bad i take that statement back fml lol

 

Before you decide to pull the head:


Check for co2 in the coolant.
Check if the overflow coolant reservoir stays full, all the way up instead of returning back to half or lower.


The fact that you've had leaks, does not necessarily mean that there is excess pressure in the cooling system.

The fact the the car is breaking up could be down to ignition, fuel issues or bad mapping. Check these first.

The fact that you are not making power could also be down to the above.


If indeed this is a headgasket issue and you have no co2 in the coolant while idling, and not an overflow tank that stays full of coolant then the headgasket is not damaged, at least not yet, but the head is lifting under certain boost causing a pressurization of the cooling system and a misfiring condition. Check the headstuds with a torque wrench.



Usually high pressurization of the cooling system due to either a bad headgasket or lifting of the head, pushes out a coolant hose or a freeze plug before damaging the heater core.







Marios