March 26, 2005I have a chevy 2500 with and old 305 tbi in it, I also have a crate 350 that was only drive for 1 year. The 350's pistons are broken but didn't damage the block. I wan't to put flat top pistons in it for the added compression. Tell me what you think i should put in there. The 350 was also set up for TBI but i want to change it to carburated is that a good idea?
Subscribers : Big Black Chevy
March 26, 2005Number one - If the engine was only driven for a year, why are the pistons broken?
Number two - Why would you want to increase the compression of the stock set-up? The octane in today's gas is so poor that with the compression increase you'll probably end up with having a bad case of detonation.
Number three - TBI is way better than any carb set-up. Most carbs are very finicky. Every time the weather changes most carbs, on performance engines especially, have to be 'tweaked' in order to keep the engine running smoothly, whereas the TBI unit adjusts automatically through the use of an Oxygen sensor and various other sensors. Switching to a carb would be like taking out your electronic ignition and putting points back in. .....
March 28, 2005I just bought the truck and the 305 motor in it has 550,000 miles on it. The 350 came with the truck because the 305 could go at any time. The catch was the 350 was over reved the last time it was driven and it knocked badly. I figured i would build the 350 up some and drop it in. I thought it had spun a bearing but when i broke into the motor the oil skirt was broken off one of the pistons. So I figured I would just replace all the pistons with flat tops because of the horse power gain. I'm not gonna put oversized pistons in it but i am putting a bigger cam and lifters in it so it won't be a totally stock set up. I want to convert it over to carburation because I have been told that you can't get much horse power out of a stock throttle body and I've also heard the bigger throttle bodies have had lots of problems.