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Ok, not really a Buick specific question, but it is for my tow vehicle and I value the knowledge base of the people on this site. What is a good OBD 2 code reader / scanner? It seems all the electronic testers are import these days and that makes it difficult to compare. To set the stage I’m...

I was out doing some street tuning with alky and I would swear that when I pulled about 4 degrees of timing out my injector duty cycle also dropped from @ 92 to 86 %. What I don't understand is why would duty cycle be affected by the timing? This does not make sense to me.

Bolt hole break thru into the intake port. This is a GN1R head. Just curios if this is a common thing when the head has been converted to a stand style rocker arm setup? How bad is this on port flow? Would this be a good candidate for epoxy to close it up?

First off I'm running a classic fast system, 63lb inj, TE-63 turbo, double pumper fuel pump & alky. My injectors have always run near 80 percent but over the past couple years with no changes to the motor this has climbed to between 90 & 100. I just figured the pump was getting tired. So I...

I'm thinking about getting a new set of tires for the front. It would be a strip only tire. I've narrowed the search down to a wide/heavy 28x7.5 sportsman or a skinny 27.5x4.5 ET front. I would like a stable tire. Would the ET front control the car as well as a Sportsman tire in an emergency...

How similar or different are the BRF transmission cases to an average commonly available case? Reason I ask, I have a BRF with a damaged cross member tab. (One side is broke off at the C/L of the bolt hole and the piece is lost. Most of the hole area is gone.) Would it be a better option to...

What would be the normal EGT at highway cruise speed @65MPH? While we are at it what would also be the norm at @40mph? What would be too high at highway speed?

Does anyone run alcohol with an aftermarket ECM? How do you tune it? With the stock ECM you are adding alcohol along with fuel, with a wide band O2, more (fuel/alcohol?) would cause the ECM to pull fuel due to a rich A/F ratio. I would like to here from someone that has done it.

Given a short deck 9.50, 6.50 rods (7.147 to the top of the rod), and a 3.59 stroke crank. Add in the piston thickness @.250 with .020 rod/piston clearance and there is not alot of material that can be moved to lower the c/r. That being said, what would be the most preferred method? (need to...

I've got a set of 165r15 street front tires. Because of the size anything less than 45psi makes the side walls look flat. That just seems like too much air to be safe for the tire. What pressure are you guy running on the street and at the track?

I would like your opinions, I need a new cat back exhaust. If it was for a stock block 231 I would just go with a 2.5 ATR. Hopefully (if done) I will be putting in a 274 TA headed oncenter motor next summer. Will a 3.0 ATR sytem be needed? If I decide to go with a 2.5 system for noise how much...