stretch intercooler with stock turbo?

[cutt]

does it do any good?is it worth it with a 44 or 49?can i expect anything with a stock turbo?

 

[ES1]

Will a larger IC reduce knock? or is knock a result of octane?
Steve which extension do you recommend?

TIA

 

[blackbuick87]

Originally posted by stevemon
by removing the gasket along the firewall-heater box area

Are you talking about the long rubber seal between the hood and the firewall?

 

[blackbuick87]

Good, mine has been removed already.
Interestingly I was having a problem with my ignition cutting out when my coilpack got hot, and I removed that piece of rubber and I could go a LOT farther before I started having problems. I still replaced the coilpack but I think it dropped the temperatures around the top of the motor significantly

 

[gnturbo]

so lemme get this straight, all those days that I spent blasting up and down the highway trying to tune out knock was wasted because I was heating everything up so much that it helped increase the knock?Makes sense now.What I dont understand is how I can have a blm of 150 and have o2s in the 830's,If the ecm is trying to add fuel why does my 02 sensor show running rich?All this and knock.knock with 02's in the 800's.fp at 42-44 and boost 14-15psi.I guess I need to limit my tuning till I heat the car up and then I need to back off huh?

 

[KendallF]

With a stock IC, you're going to heat soak it, there's no doubt. As far as the O2s vs BLMs and knock, let me add a couple of things. There are patches and fixes for some of what I'm going to mention but this is generally true for a stockish setup.

There are 16 BLM cells, arranged in a 4x4 table divided up by MAF flow #s and RPM. The ECM only adds and subtracts from them while the motor is in closed loop (i.e., less than WOT). At WOT, the ECM is using the "top" BLM cell but the WOT fueling can still be rich or lean because you're not in closed loop anymore...the ECM is guessing at fueling based on the chip parameters.

You know your chip/combo is tuned well when you can achieve both good O2 #s at WOT and good BLMs throughout most of your RPM/MAF range. Most of us are not patient enough to burn enough chips to do this, definitely including me!

Keep in mind too that the stock O2 #s aren't consistent enough to be comparable from car to car...my car used to run well with .680 O2s when your car might be blowing head gaskets, or vice versa.

I'll call you and we'll yak about it some more when my boss isn't standing over my shoulder...

 

[BABY BOEING]

I replaced my stock I/C with a stretch while I was still running the stock turbo. I noticed no gains in 1/4 mile et. or mph, the car stayed at 12.1's @ 111. I did however notice much faster spool up on the street.