Q8y_drifter

just take the stock cats, a rod and a hammer and bang the **** out of the honeycomb. free resonated test pipes!

Modme

iTrader: (17)

At least you proved how free flowing the long headers are =P

OMG37

iTrader: (2)

Just go down the street and pick up some HFC's from Tony at FI.

PS...knew this day was coming.

I'm sure you will be more than pleased with the results even with your stockies back on.

PS...you can't have my cats either...so don't even think about it...they are marked!

G37Sam

Sorry to hear that shumby

How much did you put down with 4psi though?

DmfG37sTT

Can you please explain?

G37Sam

I dont understand how that could be bad though, engineering wise it doesn't add up

If the air gets out quicker, that means more air coming in later on can flow in easier in the next cycle

Q8y_drifter

I'm thinking the cam timing is off so there is overlap which is reducing pressure. Basically he's not building enough boost before the intake cam closes because it's all escaping too quickly through the exhaust cam due to the reduced backpressure caused by the LTH's when compared to the stock headers. I could be way off.

shumby

iTrader: (3)

^^^ learn from your friend Sam. I am calling your thermo prof and telling him to give you a D-

Staples

iTrader: (9)

No you're pretty much on point. With a supercharger kit it's a MUST to have some sort of back-pressure because you're going to end up getting boost drop (as Shumby has seen). I just didn't know it was going to be this substantial.

shumby

iTrader: (3)

^^^ I don't think any of us did

PennywiseG35S

Shumby, are you running a 180 degree thermostat on the oil cooler? If so how did Sam mount everything up with the oil filter relocation kit? I wouldn't stress too much on the 4 psi, Sam will straighten it out. At least you know with some back pressure things will be good.

shumby

iTrader: (3)

^^^ yes i am. itis mounted on a custom bracket behind the oilcooler on the driver side of the car. Ya i know Sam will get it straight.

shumby

iTrader: (3)

ah much bettere today. i am happy

Staples

iTrader: (9)

Do tell! What did you end up doing?

Ivoidwarranties

iTrader: (7)

You keep calling it "timing"... timing is when the spark hits. You need to have control over that too but you're having trouble with overlap. Or at least that is what you think the issue is. You're right in that you could have ultimate control if you could adjust the VVEL. The valve events are the issue you're assuming is the problem right, not the spark timing?