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Ah yes... The good old vomiting giraffe chainsaw 3800 exhaust awfulness we have to call an exhaust note... Hahaha

Good to see it running though.

Picked up an exhaust expander, should get the exhaust and the hockey puck done tonight, maybe I can drive it to work tomorrow! WOOOOHOOOOOO! Not sure if I want to keep the expander yet or not, it was a $40 deposit, or I can just keep it and they keep the 40 bucks. I do have a bit of a tool fetish so having another around is never a bad thing. Who am I kidding, tomorrow is payday, that isn't going back. hahaha

We got the exhaust put back together and took it for a drive. It has a lot of knock retard at about anything over 2psi of boost. I rolled onto the throttle at highway speed and saw 9* KR, at about 9.8 psi of boost. Intake air temps were around 80-90* at about 20-30 above ambient.

I've removed the cat, have the spark plugs gapped at .060", 180 thermostat, SD headers, Intense tune, 3.4" pulley, Intense CAI. The only thing I can think of is to take some gap out of the plugs but I'm really not sure. Let me know what you guys think.






I think I'm going to have a cat put back in it though. I can get a walker one that is 3" or a magna flow one that is 2.5" both are CA legal for what that's worth. Not like my headers or intake are but at least the welded on part will be.

Went on another test drive. Got 3.3° KR at 11.3psi. It seems to want to kr a few hundred rpms before it shifts. I also saw 7 during a shift.


I can punch it in first with no kr it seems to happen more in higher gears

3.3 isn't awful, but you need to get rid of it. Email Intense about this issue, the 3.4 might be too small for your particular motor.

Knock around shifts is normal and to be expected.

Changed the fuel filter today. Seems to be doing a bit better. Saw 1.2 once and 2.3 once. It only seems to go above a degree when it shifts.

Went on another drive. Torque says it ran a 14.7 in the quarter with lots of wheel spin off the line. also noted that KR is very minimal in first and second gear but getting up into high rpms in 3rd the KR starts rising, say anything over 5k rpm. I haven't pulled a plug to look at them yet. I just dropped in a Lucas fuel injector cleaner and 15 gallons of Shell premium. I figure I'll wait until after I get the cat put back in it before I get in touch with Intense so I can be sure of what it is doing if/ when I call them. Nice thing is I have my original PCM right now that I could send back to be tuned and still run on this one in the mean time.

Just make sure you do not beat on the car with the stock PCM.

Threw a fuel pressure gauge on yesterday and it only had about 46-48 psi with the key on and engine off so I have a new fuel pump ordered. Rock auto wanted 280 for an AC Delco, Amazon only wanted 240 but they also had a 20% coupon too, scored a 280 fuel pump for 200 after taxes and everything Should be here tuesday. Do I have to drop the tank to get to the pump or is there access from the trunk by chance?

You can access it from the trunk.

https://www.youtube.com/watch?v=-7cY_IPCVfI

awesome! thanks

Quick update, it seems that a bottle of Lucas octane boost eliminates my KR. So for now I'm running an octane booster at every fill up.

From what I've seen and read, those octane boosters don't actually do anything. You might have switched from winter to summer blend.