Supercharger for Inline 6? How fast? - Off-Road Forums & Discussion Groups
Jeep-Short Wheelbase All discussion of short wheelbase Jeeps: CJ, TJ, YJ and JK

LinkBack Thread Tools Display Modes
post #1 of (permalink) Old 05-17-2002, 01:44 AM
Posts: n/a
Supercharger for Inline 6? How fast?

Just wondering who makes a supercharger for an inline 6? also how fast can ya'll get with the inline 6? Like topped out? Just wondering... thanks
Sponsored Links
post #2 of (permalink) Old 05-17-2002, 02:01 AM
Way Outta Control
Join Date: Sep 1999
Location: The Palouse
Posts: 13,428
Thanks: 1
Thanked 2 Times in 2 Posts
Re: Supercharger for Inline 6? How fast?

<a target="_blank" href=></a>
LEVE is offline  
post #3 of (permalink) Old 05-17-2002, 02:20 AM
Keyboard Implanted
Join Date: Sep 1999
Location: Southeast Iowa
Posts: 6,394
Thanks: 0
Thanked 0 Times in 0 Posts
Re: Supercharger for Inline 6? How fast?

[img]images/icons/smile.gif[/img] Now hold on there son. A supercharger is gonna improve the performance; no doubt about it, but before you broke the sound barrier, you'd probably break the crankshaft.[img]images/icons/crazy.gif[/img] Soupy chargers can overcome the low volumetric efficiency caused by intake losses and low atmospheric pressure, and really get your mill up and cranking.[img]images/icons/tongue.gif[/img] When you step on it at 60 it feels like stepping on it at 35.[img]images/icons/smile.gif[/img] THE PROBLEM[img]images/icons/shocked.gif[/img] is the bottom end of the engine, since the compression ratio is set for a naturally-aspirated engine, crankshaft overload and premature detonation can easily occur when boost pressure rises.[img]images/icons/frown.gif[/img] Superchargers are FUN,[img]images/icons/smile.gif[/img] however. We used to install the McCulloch kits on cars in the fifties.[img]images/icons/crazy.gif[/img]
CJDave is offline  
Sponsored Links
post #4 of (permalink) Old 05-17-2002, 08:18 AM
Posts: n/a
Re: Supercharger for Inline 6? How fast?

I could only assumbe it would be SICK Fast. Remember what a regular 258 or 4.0 will do. if you do do it - please make sure you have a fresh bottom end. there are turbo kits you there for the AM inlines. I suppose those would be a little more serviceable. i have always toyed with the idea of a turbocharged 258 powered AMC Eagle.

post #5 of (permalink) Old 05-17-2002, 09:39 PM
Can't Get Enough
Tippy's Avatar
Join Date: Feb 2001
Location: Alliance, Ne
Posts: 1,423
Thanks: 1
Thanked 0 Times in 0 Posts
Re: Supercharger for Inline 6? How fast?

I think HESCO in Alabama makes a supercharger kit.
Tippy is offline  
post #6 of (permalink) Old 05-17-2002, 10:38 PM
Posts: n/a
Re: Supercharger for Inline 6? How fast?

Remember my post from last Sept. about the blown 4.0 TJ? Here's some pics and a link to the thread. The owner Jerry Bruce said you have to be real careful, once the blower kicks in traction is an iffy thing!

<a target="_blank" href=;Board=offroadjeepshort&amp;N umber=534004&amp;page=&amp;view=&amp;sb=&amp;o=&am p;fpart=all&amp;vc=1>;Board=offroadjeepshort&amp;N umber=534004&amp;page=&amp;view=&amp;sb=&amp;o=&am p;fpart=all&amp;vc=1</a>
post #7 of (permalink) Old 05-17-2002, 10:45 PM
Keyboard Implanted
GeeAea's Avatar
Join Date: Sep 1999
Location: Pottstown, PA
Posts: 2,076
Thanks: 0
Thanked 1 Time in 1 Post
Re: Supercharger for Inline 6? How fast?

try here:<a target="_blank" href=></a>
GeeAea is offline  
post #8 of (permalink) Old 05-18-2002, 12:13 AM
Join Date: Oct 2001
Location: Mat-Su Valley, Alaska
Posts: 1,720
Thanks: 0
Thanked 0 Times in 0 Posts
Re: Supercharger for Inline 6? How fast?

Also check out Clifford Performance. They are the inline 6 gurus. Their motto is 6=8. I've used their parts in 292 Chevys and 300 Ford I-6s. They've always treated me fairly. I think this is their url:

They can also point out the best ways to hop up your six without a supercharger. We put a RV cam, dual headers and a 4 barrel carb on a 292 that we stuffed in a guys FJ40. Sounded nice (sixes with true dual exhaust sound WICKED), and with little 30x9.50 tires, like to have flipped the thing upside down when you stepped on the gas. Anyhoo, check with them.
cj5_pilot is offline  
post #9 of (permalink) Old 05-21-2002, 04:47 AM
Mud in my Veins
Junk Yard Genius's Avatar
Join Date: Sep 1999
Location: Southern Indiana
Posts: 5,383
Thanks: 0
Thanked 1 Time in 1 Post
Re: Supercharger for Inline 6? How fast?

*How Fast!?*

Well, how much money do you have?
Speed costs, how fast do you want to go?

CJ Dave started to get into it, but I have the scoop on force fed engines...

Super chargers on an I-6 are a pain in the a$$.
Especially if you don't have a flow through head (intake on one side, exhaust on the other)

Then you have to think about things like Draw through or Blow through, Sometimes referred to as 'Wet or Dry'...
Do you want to blow the boost through a carb, or do you want to draw the fuel and air mixture through the supercharger?
Draw through is easier, but has lag problems (slow throttle response), and if you ever have a spark in the supercharger, the entire intake tract is going to gain altitude in a most spectacular way!
(Ever see a top fuel car loose a supercharger?!)

Now you have to think about what type of supercharger you are going to use...
Roots type, Blower Drive Service, Wayand, (positive displacement), Paxton/ McCulloch/ Vortech (Centrifugal), Turbine (Axial Flow),

Then you have to consider the drive method...
Exhaust Turbine (commonly referred to as a Turbo Charger)
Ridged Drive, Wide belt and heavy duty 'snout' like top fuel cars.
'V' belt drive, like Paxton and Vortech.
Mechanical drive like some Roots type use.

Then there is fuel delivery.
Supercharged engines require fuel delivery three times (3X) faster than naturally aspirated engines.
They don't use three times as much fuel, that would be easy...
You have to deliver the fuel three times FASTER, or the engine will melt down.
Just try and think of how you will deliver fuel FASTER if you are running a carb...
(and people b*tch about us taking 30 hours to modify a set of carbs for supercharger use!)

Now you can consider the engine you want to install the super charger on...
If you keep the boost pressure under 7 psig, then you will only have to make sure you have used the best off the shelf, stock replacement parts you can lay hands on during rebuild...

You will not get the performance gains you are wanting with just 7 psig....

If you want to go above 7 psig on a 258 CID I-6...
You will need...
a custom made forged steel crankshaft, custom made forged steel or stainless steel rods, new rod bolts, custom made steel block main caps, main cap studs, Forged pistons, high quality rings (gap-less preferable), and high temp valves and valve seats.
You will also have to 'O' ring heads to keep head gaskets in place, you will have to use sealer or fitted intake tract components, ect....

A V-6 would be a much better idea if you wanted to supercharge something....
Junk Yard Genius is offline  
Sponsored Links

Quick Reply

Register Now

In order to be able to post messages on the Off-Road Forums & Discussion Groups forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome