only if you have or had a blower on a stock bottom end. how long did you last?how much boost?

 

9psi, Hypertech blower tune and about 1600 hard miles and cracked the ring lands on six pistons.

 

6 months. Procharger P600b, 8#'s of boost, intercooled. One cold night, the car was the fastest it had been up to that point and BAM, it blew. cold air = more boost.

 

Vortech 6#, 16K miles; 5 broken ring lands.

 

if you guys had to do it all over again, would you do the blower first, or build the motor

 

When you have boost, it only makes you want more. So I guess if I didn't have the P600B to give me a taste, my bottom end would still be stock. But there again, if you build a engine to handle boost it will be more efficent and you will see less boost on the guage. Then it's time for a bigger head unit to get the numbers on the guage which then means bigger fuel system, exhaust, trans and rear end ect..........

Are you thinking about bolting a kit on?

J

 

If I knew then what I know now, I would've built the motor, trans, rear, and suspension and then put the blower on. Would've saved me a ton of broken parts and a whole lot of money. The problem is, you never know what you're going to break until it does, so, only way to address that is to replace everything

--Sean

 

cant decide if i want to build the motor now, built on a blower later, or do the blower now and build later. pretty much what i was thinkin was build a solid 355 LC motor and throw the stock heads, mild blower cam back in, then do the blower. i only want to make 450 or so to the rear tires, but want the bottom end to be able to handle more down the road when i want to get into better heads/bigger cam/more boost

 

Mine hasn't blown yet(I just got it tuned April 1) so I can't help you there. But, looking at your short term goals, you don't need a cam for 450 at the wheels. That is money you won't have to spend to get there. Plus you said you would put another cam in there later.

Concentrate on the short block for now and you will be set for later.

 

I have a ATI P600b a 7lbs intercooled kit. On the stock motor it lasted about 90,000 miles. The FMU when bad then I cracked #1 & #7 ringlands.

 

You really need better pistons and rings with a charger. The stock compression ratio is way too high. The rings aren't gapped for a blower either.
The engine parts, fuel system, and ignition should be upgraded before installation of a supercharger. That is my opinion. GM never intended it to be for forced induction.
If you keep the boost to 6-7 pounds and take some timing out, it will last longer. But, it will probably break eventually.

 

put a s-trim on with 8 pounds of boost. Used a timing controller but blew a head gasket and hydroed the motor after 10,000 miles.

 

Forgot to mention that I have had the blower on since last July so I have put at least 12-14k miles on it since then.

 

I installed a P600B 7# at 56,000 miles and after about 14K I upped the boost to 8# and it lasted another 2k so all in all it made it 16K, ~75 trips down the track, 25 or so dyno pulls before it spun the second, thrid and fourth main bearings on the crank.

On 8#'s it made 405 RWHP / 418 RWTQ and went a best of 11.81 @ 116.50.

Uncle Marc

 

i've got about 15k on my s-trim right now. 5-7psi, put down close to 400/400 on a stock long block, no bolt ons, and a very thorough tune. but i do agree, the rings are the week point of the stock setup.