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Superchargers...Whipple 4.0 or 5.0 vs Roots 14-71

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Old 01-04-2012, 07:17 PM
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Originally Posted by jamesgangnc
Who cares how it idles as long as it does? What percentage of time are you idling.
Yes, I understand.....it's just that a good smooth idle/drivability quaility is very important to me. There are places I go boating that require long idling periods....like 45-60 minutes and I do not want the engines loading up, etc. Besides, it's just what I prefer and like.
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Old 01-04-2012, 07:53 PM
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Originally Posted by A.O. Razor
Just a question. Why is it so important with the dual carb? Why not just go with FI, have it done right the first time and be done with it? I really don't get that.
I may only boat about 12 times a season if that, but you're right....actually, Fuel Injection is another interesting item----it's only another $10-12k or so. Being that I am new to the supercharging world and that I already have the 14-71's and carbs from purchasing the boat, I think I am going to see if I can make it all work based on all the discovered information I have found in the last few days. And I'm still learning.
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Old 01-04-2012, 09:15 PM
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Originally Posted by KAAMA
Can someone explain the difference between a Whipple 4.0 vs their 5.0 ??? Keep in mind this must be for a dual carbed version. I have looked on the Whipple website, but unless I didn't navigate it properly, I could not find anything on the 4.0 as I did with their 5.0 and I am currently doing more searches within the archives of OSO about Whipples and the experience others have had with them.

Roots version. Thanx
Dustin has a post on here somewhere explaining the difference. I believe it has to do with which rotor is the driven one.
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Old 01-04-2012, 10:15 PM
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Originally Posted by Turbojack
Dustin has a post on here somewhere explaining the difference. I believe it has to do with which rotor is the driven one.
-thats the 5l and the 8.3l whipple.4l is its own deal.
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Old 01-04-2012, 10:34 PM
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Originally Posted by Young Performance
As far as I know, the 4 Liter is not offered in a top entry (carb), only in the rear entry axial blower. Eddie
As I have said before, if Whipple has the 4.0L listed on their website I cannot find it, but by what Eddie says, the 4.0L is a no carb version and it answers one of my questions.
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Old 01-04-2012, 11:43 PM
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I'd keep your 14/71's, spend the money you'd save on the Whipple's on EFI, get a cam from Bob, and idle smooth all day with reliable power. Just my opinion.
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Old 01-05-2012, 07:39 AM
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I have 2 pair of AFR 357's hard anodized for sale if anyone is interested..................less than 10 hours of running time. $5K
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Old 01-05-2012, 07:46 AM
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Originally Posted by benjen
I have 2 pair of AFR 357's hard anodized for sale if anyone is interested..................less than 10 hours of running time. $5K
Ben, Just curious as to why you are selling them? What size engines did you have them on and what application?

Haxby, probably not going to do the EFI this time around, but that sounds like good advice to me.
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Old 01-05-2012, 07:59 AM
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They are on 604ci motors. No problems.....I have the chance to get bigger heads and would do it only if these could be sold.
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Old 01-05-2012, 09:07 AM
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Originally Posted by benjen
They are on 604ci motors. No problems.....I have the chance to get bigger heads and would do it only if these could be sold.
NA or supercharged?
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