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Glenn- Ever check the flow of your mufflers? Oh and nice to see that I am not the only one running a custom 3" system.

Back pressure also effects the HP and torque curve. More back pressure will trade HP for torque.

Suggestions? I have been running Hawk HP Plus, but had to throw back on a back up set of SBS blue (pro touring) in a pinch. That was an eye opener. the Hawks worked a lot better for competition. Now, the question is there a better pad than the HP+? I autocross regularly and track on...

Depends on how much you use! :D Seriously, their website has the details. I am using "-plate" instead of "-mat" because it is lighter. Acording to their website, two layers of the plate is as effective as the mat, and weighs less.

I will try extending the pipes a little. (I have cones made up, that when in place move the tips out another half inch.) Oh, and I just placed the Dynaplate in the back loose, and it seems to help. I will just have to make time to pull the back apart to install it properly. Yes, 3" is...

I autocross under NCCC in Group II, so I have to keep the engine compliant with those rules. I could swap over the heads and intake, but was told that it was about the same amount of work as swapping the entire engine. Sorry for the confusion, I am getting the LT4 freshened- the person I...

I said if I have to. I don't want to put a bunch of weighty sound blocking material in the car if it is not going to work. What is the point of that?

Fuel pressure guage? I will hunt around youtube and see what I can find.

Interesting. I had not thought of, or heard of that technique. I will give it a go.

I have a custom built 3" cat-back exhaust, with x-pipe and no mufflers. Anyone applied stuff like dynamat and been happy? Did you do the entire interior? I would rather not for cost and weight, but if I have to...

I don't suppose there is an easy way to do that? Is this a shop thing?

ok, but short of trying to install an inverse sound generation device, other solutions? If frequency and amplitude are effected by the density of the material through which the sound wave passes, how and where do I make this change to alter the sound wave and make it less annoying?

Ok, just curious... Anyone else have more than 130K on the original clutch? I autocross, and have even been to the drag strip on occasion. For the life of me, I just don't know how the clutch is still with me. So, how many miles on yours?

Ok, has anyone here dropped a complete LT4 into an OBD-I vette? I am looking to install it in my '92 (with 6spd), and boy do I have questions... Computer? Can I run my '92 computer and leave off the MAF? Should I? If I switch computers, what else do I need to change/modify? Any and all...

Ok, the exhaust drone in my convertible is getting to me on road trips. I need help with where to start. Does anyone have an idea of where the worst of the drone is coming from? Storage/trunk area, behind or under seats, floorboards? I do not want to change the exhaust. Performance is...

Ok, replaced the ignition module. No luck. I will try the paper clip and see if I get anything. Sorry for the delay, I had to replace the radiator, again. (Second time in 6 weeks) If it says one size fits all, it does not fit anything. I just installed a DeWitt and should be good to go...

Electrical wild goose chase. Great! If my next post is done through my iPhone, it means I am stuck somewhere between Denver and Omaha.

Had mine lowered for years. You have to keep it off the bump stops. As long as you do that (and do not let the back end be lower than the front-measure), you are good. I regularly beat Z06's autocrossing, so you are not killing the performace. Also, do not forget to get it re-aligned...

Just my $.02, but if the rotors are not warped (no pulsing), rough them with sand paper and call it good. Now, if you have some serious groves, resurface. Otherwise, why remove material needlessly? On the rears, thoroughly clean and lube the guide pin. If they drag at all, they will eat the...

Ok the scenario~ When I get the underhood temps nice and toasty (stop and go traffic/autocrossing), I get a random engine cut out on acceleration. It is as if someone has a momentary switch and randomly pushes it. I have 129K miles on the girl, replaced opti at 60/70K, computer replaced...