My Blown 340
I have to say 'blown340' that I'm jealous!! I've always wanted to put a blower on my 340 but don't know enough about the 'ins & outs' of them to really get started or should I say to not get burned when making the correct purchase.........
I think it looks so intimadating to other cars when they see that 'blower' sticking out of the hood!!! Mean isn't the word for it.
Is there some insight you can give on the install, componants, horse power gain, etc of installing a blower on my 340?
Jealous in virginia..............
Greg.......mtn_jake
Just kidding about being jealous but would really like to find out more on the blower stuff I listed above.
Well at the time this engine was built,Don Hampton Blowers and BDS were they only ones that had a complete kit ready to go.
I chose Hampton because his was a little cheaper,but If I remember right I got better customer service from him than BDS.
The kit included the following: carb mounting base(which I replaced with a different one so the carbs are lower,the blower itself including the front drive. 2 pulleys (depending on what over or underdrive you choose)Idler plate and pulley ,the harmonic balancer was replaced with a machined hub that the lower fan belt pulley bolts to.
Here is a link to his website...A kit nowadays will run you $3725.00
http://www.hamptonblowers.com/ I see he has a video you can buy that tells all about supercharging(I just ordered it and watched it,it's a very lite overview on a blower install)
My carbs were first sent to Barry Grant then to Holley where they were powder coated,then anodized and chromed.
I think the key to a blower is having a good strong bottom end as well as good fuel,exhaustand ignition system. You can get different size pulleys which will under,overdrive or run your blower 1 to 1 with the engine. I have a bigger pulley on the blower so it is running slower than the engine. It's 11% underdriven. I could swap the pulleys(smaller on top)which would make it 11% overdriven but as it sits,it creates 10 lbs of boost,so thats my starting point. The other thing is a good cooling system. When I first got it running I had a aftermarket aluminum radiator and 2 electric fans in front.
As long as the car was moving it would run pretty cool but would overheat if stuck in traffic. I put a flex fan on it,while keeping the 2 electrics and even on 100 degree days in Sac it won't go over 190
BlowerDrive Service has a lot of technical info in their catalog, I worked with the machine shop that built it,Venolia pistons,Hampton and Bruce Crower of Crower cams to come up with what I have so far. I also have a street supercharging book at the shop which has a ton of good info in it. When I'm home for Thanksgiving I'll look and see who wrote it...Hope this helps somewhat