Roots Blower on VH45

[craigztoyz]

I was thinking of going centrifical after i have mine driving, but was curious of the logistics of going roots on a Vh45, I know it'd be a pain, but with the other custom intake ideas, I am curious if anyone has seen it done, if there is pics, or info, how it would handle it.

[slamdbusa]

Yes there was a post about the roots type supercharger, but it's old, and the pics don't work anymore.

[SuperHatch]

There is a good chance you'll see pictures of a wipple setup on my car by the end of the year. I know that's a long way out, but I've got to get the motor together, do the exhaust, and have the cage fab'd all before then...

[craigztoyz]

Busa, any info or leads?I grew up in El Paso for 24years, that the area of west TX you are in?

[slamdbusa]

Busa, any info or leads?I grew up in El Paso for 24years, that the area of west TX you are in?

Here is a link, that is in this VH/VK section:zerothread/279262

Well kinda, I live on the South Plains, in a small town outside of Lubbock.

[ultrapulse]

There is a good chance you'll see pictures of a wipple setup on my car by the end of the year. ...

This would be my IDEAL arrangement. Great power throughout the WHOLE range, ie near full boost at 2000rpm or 6000rpm, great response, and no turbos! (before you flame-throw me, I do own a turbo car, and yes its the best way to get big hp. But crap for doing skids, and **** overall control of power and response). If I could chose 700hp NA or 700hp turbo I'd go NA:)

[mtcookson]

I was thinking about trying a Whipple out but after lots and lots of thinking about it... I decided a turbo setup would be easier plus with a few ideas I have on the setup I could have very, very quick boost.

The screws s/c is definitely the best supercharger option in my opinion. It will give you incredible low end power yet still stay efficient enough for great top end power as well.

The only downside to Whipple I've noticed so far is their customer service isn't that great... they were kind of asses when I tried getting info about using one of their units on the VH. The only useful info I could get out of them was which unit to use and that was the W140-AX. If you're looking for quite a bit of power then I'd probably go one step up to the W200-AX.

If I could choose between 700 hp NA and 700 turbo I would most definitely go with turbo... because that comes backed with a **** load more torque.

[SuperHatch]

This would be my IDEAL arrangement. Great power throughout the WHOLE range, ie near full boost at 2000rpm or 6000rpm, great response, and no turbos! (before you flame-throw me, I do own a turbo car, and yes its the best way to get big hp. But crap for doing skids, and **** overall control of power and response). If I could chose 700hp NA or 700hp turbo I'd go NA:)

Well I've been going back and forth constantly between a whipple and a procharger... I'm really leaning towards a whipple right now. I could go centrifugal and save myself the headache of doing an intake manifold, but I still have to fab up the mounting brackets, do the plumbing, run a water/air setup, etc. etc. And then I need to get some very expensive side feed injectors...

I've been staring at this Cobra Intake manifold and there's no way to make it work. The plenum is too low and it interferes with the Coolant setup on the VH, plus the intake ports are staggered the wrong way. But I think I can use the IC out of it, and fabbing this style manifold with the appropriate clearances doesn't look to difficult. I could get any length snout I need from whipple and make it work. I can then get some nice top feed peak/hold style injectors with an AEM injector driver and be set... The response of the whipple would be great for getting the RPMs up the stall faster and the car would make great torque for hard launches.

Yea... screw type is where I'll be going...

[SuperHatch]

The only downside to Whipple I've noticed so far is their customer service isn't that great... they were kind of asses when I tried getting info about using one of their units on the VH. The only useful info I could get out of them was which unit to use and that was the W140-AX. If you're looking for quite a bit of power then I'd probably go one step up to the W200-AX.

Whipple rates the 140 good for up to 20psi on a 4.6L Cobra. I think it'll be plenty big enough for a VH...

[mtcookson]

Yeah, I agree that you shouldn't need anything larger than the 140AX. You'd have to aiming for over 700 WHP to need a larger unit.

[SuperHatch]

Yeah, I agree that you shouldn't need anything larger than the 140AX. You'd have to aiming for over 700 WHP to need a larger unit.

Then maybe I WILL need the 200....

[mtcookson]

Oh hell... I just NOW noticed the link in your sig. I happened to stumble on your site yesterday and wasn't sure if the owner of the car was here or not... well, now I know.

You may actually want something bigger than the 200 for that car. The 200 will probably limit you to the 850 whp range I'd say. The 305AX on the other hand.... that sucker should run you up to about 1,500 whp.

Really if you think about it... that 200AX almost needs to be a little bigger. Its not a big enough upgrade over the 140AX when you actually look at the numbers.

Anyway, if that S14 is what this unit is for and you're going for all out power you may actually look into the 305AX... that sucker would be meeeeaaaaaaaan.

[SuperHatch]

Well, my ultimate goal is to build a reliable low-9 second car, and I know that 800WHP should get me there. I would really like to keep the IRS, but with how things are going, I don't know if that's a realistic goal anymore.

I plan on bracket racing the car at a lot of the local events, and I can't be dealing with broken parts all the time. I really see myself going with the 140 at first, and if I want to go faster, I'll need to backhalf the car and then put a bigger blower on it.

[mtcookson]

Ahh, ok. Yeah I'd say with that goal the 200AX should be the biggest you need.

What differential are you currently running? If you want to stay IRS you may consider try getting the R230 in there. With the TH400 that thing should be unbreakable, even in the 9's.

[SuperHatch]

Ahh, ok. Yeah I'd say with that goal the 200AX should be the biggest you need.

What differential are you currently running? If you want to stay IRS you may consider try getting the R230 in there. With the TH400 that thing should be unbreakable, even in the 9's.

I had originally planned on the R230... Full-Race used to do a conversion where they modded the subframe to fit it. They don't do it anymore, now they recommend a Skyline rear. It's still an R200, but it has the larger output shafts of the R230 with the beefier axles and hubs. From what they say, most people are snapping axles and not tearing up the diffs. I plan on running the R200 Skyline diff now, but we'll see how well it does or doesn't hold up. The benefit though, is since it's an R200 I have a lot more options for gear ratios out of other diffs.

[mtcookson]

90-96 Q45 R200 is the same way. R230 style flange axles and axles but in an R200 package. Has 3.538 gearing but, like you said, there are enough R200 options out there you could probably change around the ring and pinion for something else.

[SuperHatch]

90-96 Q45 R200 is the same way. R230 style flange axles and axles but in an R200 package. Has 3.538 gearing but, like you said, there are enough R200 options out there you could probably change around the ring and pinion for something else.

Thanks for the tip! I guess it will just come down to which I can get cheaper. The Skyline diff has a 4.08 in it stock, so if I can get the Q45 setup for less than what th skyline setup will cost me and swap the stock gear out of my S14 in, I should be in business..