Some Questions about blowers....

[Roshambo]

ok, Im going to get Wieands 142 CI blower for my car in the next few months... I know my drivetrain can handle it. Ive got a few concerns though.

1. Should I buy a new driveshaft and a safety loop?

2. What about SFCs because of the T-tops?

3. As far as mileage and performance, should I keep with my Auburn 3.23s? I like having a high top speed, so I think the most change I would make would be would be to 3.42s or 3.55s.

4. I am planning on putting on a fiberglass 4" will my Round Air cleaner work well for this?

-Roshambo

------------------
-Joe
1982 Camaro Z/28 - 305 Balanced and Blueprinted, TRW Forged Flat Tops, Comp Cam, Demon Road Race 625 CFM, 700R4 w/Trans-Go Stage II Shift Kit, Auburn 3.23, Maroon Interior, T-tops, 85 MPH speedo (DAMN)
http://www.harborside.com/~blountls/Sig%2002.jpg

[Chaotic Firebird]

Centrifugal or out of the hood style?

------------------
Formerly 92BlackBird

The Chaos...
All you Pontiac guys out there,be kind to those 5.0 Stangs.They suffer from P.M.S.

Pontiac Muscle Syndrome!

[Roshambo]

Oh, yeah. Its a Roots type blower.

-Roshambo

[Dave Z]

I would have to say that a driveshaft loop is definately a good idea. You need one after you break into the twevles, i think.
You may want an aluminum driveshaft but I don't think that you will really need one. An aluminum ds will be lighter and will free up some horsepower as well as being stronger, though. I think the u-joints would go before a driveshaft would.

The sfc will keep your car from flexing from the extra power. It would be a good idea to get them but I wouldn't worry too much if you don't have the money right away. Because I think the only time it would matter is if you are launching really hard. You will end up boiling street tires and if you have slicks, the rear will probably go before you cause any frame damage.

The rear gears are going to be your choice. I would keep them and if you want to go down the 1/4 mile quicker then change them.

As far as hood clearance goes, I looked up on wieand's site and the blower is almost 9 inches without carb. Their stealth intake is 5.33 incehs. Your current intake should be pretty close to the stealth so if you add in another four inches of hood clearance because of the cowl hood. Your current air filter should fit. But it may be a very close fit.

Be careful how much boost you use. Roots blowers generate a lot of heat which will cause detonation. Based on my limited knowledge of roots blowers I would try to start out with 6psi or less. The answers I gave you is just what I would do in your situation. It sounds like your car is going to be haulin ass. good luck.

------------------
1987 Corvette Z51 4+3 My site (http://members.spree.com/travel/dave91z28/index.htm)
http://members.spree.com/travel/dave91z28/p1.jpg

[Roshambo]

Alright, thanks Dave!! Im hoping for high 12s low 13s when i get this bad boy running. Another question, should I stick with this carb I have now? I really like the demon, and 625 cfm seems like a nice size for my motor. Basically what Im shooting for here with this project, is to change the local peoples opionions of 305s. http://www.3rdgen.org/ubb/biggrin.gif

-Roshambo

[Dave Z]

I am not to sure about the carb, but I would keep it and see if you will need a bigger one. You will definately suprise a bunch of people with that. I am pretty sure you will be able to get at least a low 13 second timeslip.

[Roshambo]

Yeah, I already have surprised quite a few people with what I have now, so I cant wait to get that thing on there. It wont be for 2-3 months, but I want to get all the information I need to get it setup properly before I jump into it! The closest strip here is 1/8 mile.. Do you happen to know at what speed cages and such are required? BTW, I noticed your car and mine have the same color scheme, thats pretty cool eh? http://www.3rdgen.org/ubb/smile.gif

-Roshambo

[Dave Z]

I am not to sure about the exact times required for all the safety equipment because I lost my sheet with them on it, and since I can't find a site with the rules on it, the only way I know to be sure is to go buy an NHRA rulebook. I know if you go below 14 seconds 1/4 mile you need a helmet. The rules will be different at a 1/8 mile track since it is only half the distance. Your best bet would be to call them or ask someone in person.

[Roshambo]

Alright, I knew I was gonna need a helmet... hehe, think my old bike helmet would work? http://www.3rdgen.org/ubb/biggrin.gif Do you know of anyone on here with a roots type blower on their 3rdgen? I havent been able to find ANYTHING 3rdgen related on searches...

-Roshambo

[crazeinc]

hey roshambo, it's PJ...I used to talk to you on AIM under unitedhope....my name is fillup82Z now...

I'm actually thinking of bolting on a 142 on my 350, too. I've got a 4" cowl hood and I think only a tiny air filter will work, because they are tall.

As far as the safety loop, I wouldn't worry about it, but go ahead if you'd like too.

Get the SFC's...you'll be happy you got them.

My bottom end isn't quite as strong so I'm going to get an MSD Digital 6 ignition system so I can make sure my timing is low enough that I'm not going to destroy it. You might want to look into it...

------------------
'82 Z28 (http://members.fbody.com/Pro82Z) - very choice :)

[crazeinc]

oh yea....forgot about the carb...

The way it works if you didn't know is that the 142 stands for how many cubes it adds to your engine. So once you bolt that on you have an approximately 447 ci motor. This is just approx, but it gives you an idea that you're going to need a bigger carb to handle all of that extra air coming into the motor.

Since I've got a 350 instead of your 305, I'm looking at close to 500 ci, so I'm thinking at the very least a 850 double pumper...maybe even a dominator.

And for those of you that will say that's overkill, you can never have to much carb...you can put an unnecessary amount of fuel into the motor by having a large cfm carb and that will kill your power and mileage, but if you tune it properly you'll get great results. Just read a few of David Vizard's books.

[Roshambo]

Yeah, so basically, if I keep the 625 cfm on there, I would be undercarbing the motor. Thats what I figured. I think Ill go with Demons 750 then... im not going for all out wild car, I want semi mild, but the car will still be my driver to work and such.

-Roshambo

------------------
-Joe
1982 Camaro Z/28 - 305 Balanced and Blueprinted, TRW Forged Flat Tops, Comp Cam, Demon Road Race 625 CFM, 700R4 w/Trans-Go Stage II Shift Kit, Auburn 3.23, Maroon Interior, T-tops, 85 MPH speedo (DAMN)
http://www.harborside.com/~blountls/Sig%2002.jpg

[marshman650]

This group seems to know alot about this stuff. I am going to be getting the engine rebuilt in the next year and i am planning on what i should do as far as beefing it up. I have a 305 tpi and want to either add superchargers or really high compression. I heard the 2 together dont mix but seperatly they bother work really well. I am looking for mad excelleration but addictive highend power. I like hitting speed excess of 150. Any of you have any advice.

[Roshambo]

<font face="Verdana, Arial" size="2">Originally posted by marshman650:
This group seems to know alot about this stuff. I am going to be getting the engine rebuilt in the next year and i am planning on what i should do as far as beefing it up. I have a 305 tpi and want to either add superchargers or really high compression. I heard the 2 together dont mix but seperatly they bother work really well. I am looking for mad excelleration but addictive highend power. I like hitting speed excess of 150. Any of you have any advice. </font>

Well, yeah, you wont want high compression if you decided to go with forced induction. So pick one or the other basically, they both have their strong points http://www.3rdgen.org/ubb/smile.gif As far as High end speed.. I would suggest like 3.23s, or maybe 3.07s.. off the line wouldnt be super damn fast, but you would have a niiiiice top speed. Hope that helps a little man! http://www.3rdgen.org/ubb/biggrin.gif

-Roshambo


------------------
-Joe
1982 Camaro Z/28 - 305 Balanced and Blueprinted, TRW Forged Flat Tops, Comp Cam, Demon Road Race 625 CFM, 700R4 w/Trans-Go Stage II Shift Kit, Auburn 3.23, Maroon Interior, T-tops, 85 MPH speedo (DAMN)
http://www.harborside.com/~blountls/Sig%2002.jpg