Anybody on here have a supercharger on their Mustang?

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Posted by BILLY WALTON from GEORGIA
7/27/2024 11:00 AM
#1

I remember Glen having a Paxton. I would like build one one day that was driveable like the whipple chargers nothing sticking out of the hood though.


Its really me....I fixed my caps lock .
 
Posted by Raymond_B
7/27/2024 2:27 PM
#2

BILLY WALTON from GEORGIA wrote:

I remember Glen having a Paxton. I would like build one one day that was driveable like the whipple chargers nothing sticking out of the hood though.

I had a Novi 2000 on my Lightning, so it's kinda of a Mustang Are you going to stick with a carb and go blow through? It'd be pretty easy as long as you kept the boost low. You'll need the blower, brackets, fuel system upgrade, blow through carb, etc. My only complaint was that I kept eating belts, but the truck setup has horrible bracket flex, in a classic Mustang I do not think you'd have that issue.
 

 
Posted by TKOPerformance
7/27/2024 3:15 PM
#3

A good friend has a Kenne Belle on his '95 Cobra.  It makes crazy power, like 550HP.  At 60 in 3rd gear if you punch it it'll roast the tires.  Its injected and he tunes it himself.  I think it has 55lbs/hr injectors in it now.

The thing is, you really need a good bottom end or its basically a bomb, especially if the tune up goes off.  If the idea is a cheap bottom end making big power with a blower, forget it.  You need forged pistons, good rods, etc.  You can keep compression down, and don't really need killer heads or a big cam. 
 

 
Posted by Nos681
7/28/2024 9:50 AM
#4
Posted by Raymond_B
7/28/2024 12:16 PM
#5

TKOPerformance wrote:

A good friend has a Kenne Belle on his '95 Cobra.  It makes crazy power, like 550HP.  At 60 in 3rd gear if you punch it it'll roast the tires.  Its injected and he tunes it himself.  I think it has 55lbs/hr injectors in it now.

The thing is, you really need a good bottom end or its basically a bomb, especially if the tune up goes off.  If the idea is a cheap bottom end making big power with a blower, forget it.  You need forged pistons, good rods, etc.  You can keep compression down, and don't really need killer heads or a big cam. 
 

Not really disputing what you say, but for something like 5-6 lbs of boost (like the old blow through Paxton kits) you don't need a lot of expensive parts. That's why I said "low boost", start upping the boost, and yeah, start opening your wallet.
 

 
Posted by TKOPerformance
7/28/2024 4:13 PM
#6

Raymond_B wrote:

TKOPerformance wrote:

A good friend has a Kenne Belle on his '95 Cobra.  It makes crazy power, like 550HP.  At 60 in 3rd gear if you punch it it'll roast the tires.  Its injected and he tunes it himself.  I think it has 55lbs/hr injectors in it now.

The thing is, you really need a good bottom end or its basically a bomb, especially if the tune up goes off.  If the idea is a cheap bottom end making big power with a blower, forget it.  You need forged pistons, good rods, etc.  You can keep compression down, and don't really need killer heads or a big cam. 
 

Not really disputing what you say, but for something like 5-6 lbs of boost (like the old blow through Paxton kits) you don't need a lot of expensive parts. That's why I said "low boost", start upping the boost, and yeah, start opening your wallet.
 

I wouldn't say expensive parts per say.  I would advise having forged pistons and making sure the rest of the bottom end is fresh with good quality bearings, rod bolts, etc.  Low or high boost is really a misnomer.  A boost number referenced in psi, which they ALWAYS are, is meaningless.  You can flow a ton of air at low boost pressure; that's a function of the restriction in the engine and the blower you are using.  Everyone talks about psi numbers because trying to talk about mass flow is too difficult.  Psi numbers are only relevant when talking about a stock setup on a car that had forced induction from the factory.  If I took car car from say 12psi to 13.5 psi by adjusting the wastegate it gives you some idea of what I did i terms of moving more air, and it can probably be correlated to a gain of X in terms of power or a reduction of Y in terms of 1/4 mile time.  Pressure per say isn't a danger, but making more power is where things start to get dicey with stock parts.  At the very least I prefer a forged piston, especially on a carb application due to it durability.  Beyond that look at the power you intend to make and built accordingly.  My point was more that throwing a blower on a clapped out bottom end is a good way to waste money. 

 
Posted by Raymond_B
7/28/2024 6:56 PM
#7

TKOPerformance wrote:

I wouldn't say expensive parts per say.

I would!

You can go all scientific if you want, but boost level certainly be used to "gauge" what's needed for an entry level kit. 


 

 
Posted by TKOPerformance
7/29/2024 5:51 AM
#8

Raymond_B wrote:

TKOPerformance wrote:

I wouldn't say expensive parts per say.

I would!

You can go all scientific if you want, but boost level certainly be used to "gauge" what's needed for an entry level kit. 


 

My point is that it doesn't gauge anything.  You'd be better off to ask "how much power will it make"?  Then you can build the engine accordingly.  My buddy's Kenne Bell only makes 8psi, but added about 200-250 HP at the rear wheels (total 500-550).  He's at or slightly beyond the limit of a stock 5.0 block (he has an aftermarket block). 

That same blower on an engine with stock heads, cam, intake, etc. would probably make 12-15psi due to the increased restriction. 

The lower boost engine to the layman would seem to make less power, but in truth it makes more because you are comparing apples and oranges.  Bottom line: superchargers are expensive and so are engines.  If you are contemplating going this route I would have a serious and lengthy conversation with the manufacturer and see what they recommend.  I highly, highly doubt any manufacturer is going to say its fine to throw another 100+HP at an engine with cast or hypereutectic pistons at the very least. 
 

 
Posted by BILLY WALTON from GEORGIA
7/29/2024 8:22 PM
#9

TKOPerformance wrote:

Raymond_B wrote:

TKOPerformance wrote:

I wouldn't say expensive parts per say.

I would!

You can go all scientific if you want, but boost level certainly be used to "gauge" what's needed for an entry level kit. 


 

My point is that it doesn't gauge anything.  You'd be better off to ask "how much power will it make"?  Then you can build the engine accordingly.  My buddy's Kenne Bell only makes 8psi, but added about 200-250 HP at the rear wheels (total 500-550).  He's at or slightly beyond the limit of a stock 5.0 block (he has an aftermarket block). 

That same blower on an engine with stock heads, cam, intake, etc. would probably make 12-15psi due to the increased restriction. 

The lower boost engine to the layman would seem to make less power, but in truth it makes more because you are comparing apples and oranges.  Bottom line: superchargers are expensive and so are engines.  If you are contemplating going this route I would have a serious and lengthy conversation with the manufacturer and see what they recommend.  I highly, highly doubt any manufacturer is going to say its fine to throw another 100+HP at an engine with cast or hypereutectic pistons at the very least. 
 

it would be later...but I do have Forged flat top pistons in my engine now .
 


Its really me....I fixed my caps lock .
 
Posted by Raymond_B
7/30/2024 10:24 AM
#10

BILLY WALTON from GEORGIA wrote:

TKOPerformance wrote:

Raymond_B wrote:


I would!

You can go all scientific if you want, but boost level certainly be used to "gauge" what's needed for an entry level kit. 


 

My point is that it doesn't gauge anything.  You'd be better off to ask "how much power will it make"?  Then you can build the engine accordingly.  My buddy's Kenne Bell only makes 8psi, but added about 200-250 HP at the rear wheels (total 500-550).  He's at or slightly beyond the limit of a stock 5.0 block (he has an aftermarket block). 

That same blower on an engine with stock heads, cam, intake, etc. would probably make 12-15psi due to the increased restriction. 

The lower boost engine to the layman would seem to make less power, but in truth it makes more because you are comparing apples and oranges.  Bottom line: superchargers are expensive and so are engines.  If you are contemplating going this route I would have a serious and lengthy conversation with the manufacturer and see what they recommend.  I highly, highly doubt any manufacturer is going to say its fine to throw another 100+HP at an engine with cast or hypereutectic pistons at the very least. 
 

it would be later...but I do have Forged flat top pistons in my engine now .
 

Even a stock engine (with supporting fuel and ignition) would handle 5-6 pounds no problem, not sure what your goals are exactly, but as long as it's not run lean or with too much timing you'd be OK at that level assuming no mechanical or tune issues. No need to break out a slide rule or supercomputer LOL. 
 

 
Posted by TKOPerformance
7/31/2024 6:15 AM
#11

I would feel confident adding another 100-150HP to an engine with a sound bottom end and forged pistons, ASSUMING: existing compression is:

10:1 or lower with aluminum heads and EFI

9:1 or lower with iron heads and EFI or aluminum heads and a carb

8.5:1 or lower with iron heads and a carb

The cam is also going to have a major impact on how the blower works.  If the engine has a lumpy cam I would swap it for a milder cam or a blower grind.  Forced induction doesn't need overlap to fill the cylinders at high RPM; it needs a closed exhaust valve to cram as much charge into the cylinder as possible while the intake valve is open.

The tune up is VERY important.  Start tuning on the rich side of fueling and the conservative side of timing.  If it detonates, even detonation you can't actually hear, chances are something is going to go really bad in a hurry. 

Another thing to consider is what the ring endgap is.  The forged pistons buy you some durability, but not if the top ring buts.  Hopefully the gaps are a little wider than required for an NA engine.  Blowers and nitrous create more heat, thus rings expand more.  If in doubt I'd pull it apart and check the gaps.  Cost is some gaskets.  Benefit is the engine doesn't blow up. 
 

 


 
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