Hi all newbie to the forum here. Just put my 76 in storage yesterday for the winter, when it comes out in the spring I want to but a blower in it, anyone here running one, anything I should be aware of and any brand prefrence, I've been looking at either a Weiand pro street 177 or a 6-71. Thanks in advance for any advice.

Dave

 

Welcome Dave! I don't know anything about blowers but I still have some advice for you. Don't wait until spring to put in the blower. If you do you will be spending all spring and half your summer working on the car instead of driving it. :cheers:

 

Welcome Dave

Might try asking norvalwilhelm he's running a blower on his

Good luck

 

I'm running a 8-71 on my 460. Glad to talk about it . Just ask away. :)

 

Wait a minute... is norval blowin' indigovette?

I missed the whole thing!

Haha...

What kinda of increase can you expect from a smaller under the hood supercharger?

What are the legal issues of having a blower hanging out your hood on the road?

 

Wait a minute... is norval blowin' indigovette?
I don't follow this Spook? and the smaller under hood superchargers can still make alot of boost. My wife has a Bonneville supercharged and it puts out 7 pounds of boost instantly at any rpm.
So far I have never had a problem with the blower sticking through the hood. The rule in Canada is if you can see both fenders, I assume the front corner you are OK. My fenders drop away towards the front so I can't see the drivers side, sure can't see the passengers side but can see both equally up to where they drop away.
So far like I said no one has bothered me.
Double click to enlarge

 

:smash: :smash: :smash: :smash: :smash:
:cheers:

 

Only what to supercharge under a stock vette hood is go with TPI/LT1 type injection system and centrifical type supercharger. Hope to do it one day.

 

a lot of increase clearance is an issue but lots of fun


[Modified by MILO851, 5:45 PM 11/12/2003]

 

A similar thread...FYI

http://forums.corvetteforum.com/zerothread?id=688914

 

I agree with Boofers. Don't wait til Spring. If you can manage it now, do it now. Nothing worse than having your car down when the weather is nice.

:sad:

 

Well I'd love to do it now but then I would want to drive it and well vettes and snow don't go together. Plus I have a couple race sled tying up my garage. Norv....... what kind of life can I expect out of a blower before a rebuild? will my car still be drivable on long trips? should I run a duel electric fan set up? got more questions just have to remember them.

 

Here's some history first, LOL. I drove my dad's '63 Avanti to High School. It came out of the Studebaker factory with a Paxton supercharged 289, called an R2 (Studebaker had their own 289, even before Ford did). The president of Studebaker was the first registered owner of the car and sent it to Paxton Products in Santa Monica to be the prototype for the Avanti R3. Andy Granatelli worked his magic and basically built a race car. It's a Studebaker (somewhere between 289 and 304 cubic inches), has so much valve overlap (they didn't care about gas costs then) that it spews unburnt fuel out of the exhaust by the gallon, and the starting procedure is to pump the gas no fewer than 10 times, essentially flooding the motor, and then turn the key to throw some sparks at the mixture.

Anyway, I routinely saw 7 pounds of boost and one night saw 10 pounds; the rating the blower was supposed to make. By the time I got the car, the valve springs were shot so I took it easy. When my dad drove the car in the '70s he cruised at the "R" in "RPM" The thing is, the "R" was before the 1 and well after the 6, somewhere around 8K RPMs.

For an underhood blower (these were the Paxton units you'd see on Shelbys and Mustangs of the time) it made some very nice power instantaneously, so much so that I would love to find a used Paxton or Vortech supercharger to put on my Vette.

 

Norv....... what kind of life can I expect out of a blower before a rebuild? will my car still be drivable on long trips? should I run a duel electric fan set up? got more questions just have to remember them.


Blowers should last forever, remember they originally came on big trucks that go a million miles. Aparently the problem is when they just sit alot the seals take a set. I expect mine to run forever. As for driveable it is more drivable then a modified engine. The blower doesn't need a wild cam, it starts with low compression so as long as you take it easy you can run on any cheap junk gas and the bottom end torque is so strong you do not need those 3.70 or 4.11 gears. I had to pull my 4.11's because even in 3rd the thing lite up the tires with just rolling on the throttle so I went back to 3.08 and it is faster off the line.
I run dual electrics just in case I am stuck in traffic but most of the time I have both turned off

 

Norval,
What size tires are you running on the rear?

 

I think he's referring to the other meaning of "to blow" :skep:

 

KJL I am running 305 radials because that is the biggest radial I could find. I do not want to run BFG drag radials because I love running expressways and they wear down too quickly or at least look shabby in a few months.

 

Are you using offset trailing arms or did you just move the parking brake clip location? I was considering the Whipple but it cost so darn much. What size Holly blower and carb would you recommend for a 406?

I found a place called RPM Revolutionary Performance out of TN that will build me a 406 short block with forged 26cc dished pistons that will work well with my 64 cc heads. Forged crank as well. Includes fly wheel, timing set, oil pump and damper, bored, torque plate honed, mains line honed, decked and balanced with cam of my choice for around 2600.00


[Modified by KJL, 3:29 PM 11/19/2003]

 

I have knotched trailing arms, built at home. Anyone with a welder can make a set of knotched trailing arms in an evening. Knotched is what you see in all the corvette chassie manuals.
Whipple to me is the top of the line blower/supercharger.
I am a fan of blowers over superchargers and turbo chargers because they are the easiest to install, the most impressive driving down the street and put the boost out from idle on up. I can get 10 pounds of boost at 1200 rpm and that is what pulls you out of the hole, passing or anything else.
I do not have heating problems. To me I don't have alot of room at the front of my motor for a supercharger but if I went that route I would make room. A turbo charger is the most efficient but a pluming nightmare and the extra heat is trapped under the hood.
Both the turbo and superchargers are more efficent then the blower but both are somewhat rpm dependent.
I would run a 6-71 with a pair of holley carbs in the 650 range.
I run a 8-71 and 2 850's on my 460 and I do not have too much carb, never a hesitation and great gas mileage.

 

Where are you pulling your vacuum from to run your vac stuff? How many inches? A TCI tech told me I will need at least 12" to run the vacuum modulator on my turbo400.