whats a boost cut going to do?

 

so you cant turn the boost up to 15 psi on a car tuned for 7 psi

 

I plan on running around 25-20. soo once its tuned i dont plan to **** with it

 

A picture is worth a 1000 words right, well here are 2000 then


Tuned to 7 psi The car is getting its fuel/timing trims from the highlighted blue portions. Add more column and there is nothing on there or only calculated values that have to be tuned. Thats why the stock ECU goes into limp mode



You cant properly get to a destination if the map you are using has a hole on it, you are doing the same thing to your motor.

 

What map you talking about?
and your saying that if the ecu is tuned for a certain psi you cant go higher because the ecu wont know what numbers to use?

I have a speed factory 4bar map btw

 

that's exactly what he's saying...

 

The overheating was probably due to the tune but the pistons breaking was a chain to the overheating, cap leaking, coolant in intake manifold. Thats exactly what makes sense. because the car was never on after the final pull so there was no way the intake manifold and exhaust manifold were soaked with water from just sitting there. You can see a nice stream running down the intake right into the chamber.

 

You should buy my 88mm pistons.

It won't let you blow your motor up again.

 

used?

 

not for nothing but u need to really take your car to a shop / tuner who knows what they are doing .. but since u got money to blow keep doing what you do .. i love reading awesome posts like yours..

good luck on the 3rd build

 

1st rebuild, 2nd motor

 

Yes, the 4bar map only allows your ecu to read up to 32 psi or whatever it is but it wont know what fuel tables to use since it wont have any. Limp mode is your freind so is a boost cut

 

thats why i was in the middle of getting it tuned. dont need a boost cut if its tuned right.

my problem was that i went to a friend and not a tuning shop

 

I always put a boost cut on street cars. It saves a lot of cars from what happen to you.

 

Ever heard of over boost, or boost creep, what happens if your wastegate fails? Boost cut will save your motor if that happens. ALways, always set your boost cut

 

Lean protection is also great.

 

did you have a wideband, was it lean. also have any idea what the timing was.

 

Wideband was high 11's full boost. idle its around 15-16

no idea on the timing.

 

Should have the car tuned and running tomorrow. All 4 pistons were messed up. Went out and bought 88mm arias pistons. The car started today and i should be getting it tuned today hopefully.

 

So everything has been running for about a month or so. No major problems just my radiator keeps leaking out of the cap so i went and ordered a duel core. I went to low with the compression with the arias pistons. My compression is like 110 on all 4.

 

My guess too. Looks like the ring started to get seized and it broke out the top of the piston. It started off ok but once they got hot and started to expand... BLAMMO

 

what compression were you running 6:1? 110 is extremely low were you doing it right? throttle plate wide open?

 

8.4 low comp pistons. maybe i wasnt doing it right. you have to have the throttle wide open?

 

Yes, when doing a comp test you must have it full throttle while its cranking

 

even if they dont, send them out to get flow tested and calibrated just in case, it doesn cost that much, especially since you only seem to be doing it on 1 cylinder