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Author
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Topic: Supercharging
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70SportsRoof
Gearhead Posts: 901
From: Orange County, CA
Registered: Dec 2001
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posted 06-10-2003 07:15 PM
   
Does anybody here have a supercharger on their classic Mustang? I see that Paxton now offers a supercharger for late '60's small block Fords. What are the pro's and con's of using a supergharger? Are they a good way to get extra boost? What kinds of mods does an engine need, if any, to run a supercharger? ------------------
Gary M.-
1970 Mustang Deluxe SportsRoof (daily driver), 1946 Ford pickup, 1947 Ford pickup, 1957 Ford Fairlane 500 Town Vic
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aGreenAgent
Gearhead Posts: 142
From: Orange County, CA
Registered: Oct 2002
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posted 06-10-2003 09:16 PM
The paxton one is almost the same as the one offered as an option on the 67 GT-500's I believe. As I recall, they added a lot more HP on there (150 extra or something?). I might be forgetting, but I looked into this a month or so ago.
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SteveLaRiviere
Administrator Posts: 42859
From: Saco, Maine
Registered: May 99
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posted 06-10-2003 09:35 PM
I will tell you that Paxton sold the rights to all the old ball type superchargers to a company named Paradise and they are jerks to deal with. They will not give out technical info {won't even answer questions} or diagrams, or sell you parts. All they will do is rebuild your unit for $450-700 depending on type. {they are not the friendliest people in the world, either} After what my friend went through, I'd use any other unit but theirs.------------------
'70 Mustang Mach 1 - '72 Mustang Sprint - '94 F-150 Please remember our sponsors,
Mustangs Plus, NPD, Osborn Reproductions, MyFordPerformance.com, and FordRamAir.com
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Toronado3800
Gearhead Posts: 832
From: St. Louis, MO
Registered: Jul 2001
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posted 06-10-2003 10:09 PM
I've never owned one but I THINK its like a turbo where lower compression motors benifit more. One of my infamous buddies bolted a through the hood blower on an otherwise stock 350 and BOY did it run good. Still ran o.k. until he burnt a hole in a piston.So he had to run a richer carb set up (like fuel pump and all) and do something with his timing.
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Clasy66
Journeyman Posts: 59
From: Placerville, CA (near Sacramento)
Registered: May 2003
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posted 06-11-2003 03:57 AM
Superchargers are probably one of the easiest ways to get more torque out of an engine. Toronado3800 was right, its a good idea to have lower compression on a boosted engine. They force more air/fuel into the cylinder which increases compression, and it also compresses the air which heats it up and makes detonation more likely, which then results in holes in your pistons.  Forged pistons are all but required for this reason. You also have to richen up the mixture quite a bit. The benefits are that you can adjust the boost by switching to different size pulleys, you get much improved torque from idle through redline, and you don't have to worry so much about the flow characteristics of your engine so you spend less money on heads/intakes etc. . . Brandon
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Clasy66
Journeyman Posts: 59
From: Placerville, CA (near Sacramento)
Registered: May 2003
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posted 06-11-2003 04:08 AM
quote:
Originally posted by Clasy66:
The benefits are that you can adjust the boost by switching to different size pulleys, you get much improved torque from idle through redline, and you don't have to worry so much about the flow characteristics of your engine so you spend less money on heads/intakes etc. . .
Oh, and it sounds cool. ------------------
Brandon
------------------------ '66 Mustang coupe
302
Holley 4V
Headers/exhaust
C4
Front disk brakes
8" open rear Purchased car 06/2003
Goal: 12 second beautiful but mean daily driver.
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blown 351
Journeyman Posts: 68
From: Seattle, Wa. 98258
Registered: Dec 2001
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posted 06-11-2003 10:19 AM
Yes, I am running a Procharger on a 393 windsor stroker, in a 68 fastback.
There is no con that I can think of, other than you'll be limited to high octane fuel. I run 91 or 92 pump with no problems. It's primarily a street car with trips to the road track and strip during the summer.
The power gained is tremendous, both low end and up top.
The fuel system will have to be upgraded, but I was able to run the factory 3/8 fuel line until I stroked the engine. Then it was 1/2 hardline replacement, with a bigger pump.
If it's a daily driver, the engine should have a compression ratio of no more than about 9:1 to be safe.
I'm blowing 7 lbs through a modified 4150 750cfm, and have great tune-ability and no intercooler.
It's a 5 speed street car with front sway bar and 225x16 front tires and so far it's gone 11.14 @ 125.6 on drag radials with a 1.71 60ft, but it still spins the tires coming out of the hole, and on the 1-2 shift.
Chassis dyno at 524 RWHP and 540 RWTQ. Timing is conservative @ 9 initial and 28 total
I personally don't care for the older Paxton units, but the Paxton Novi is a good unit.
I've always had good results with Procharger installations over the years, so I'll stay with them.
I'd be happy to discribe my install in much more detail....
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indyphil
Gearhead Posts: 2354
From: Senoia, G.A. USA
Registered: Jul 2002
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posted 06-11-2003 10:50 AM
Blown 351,
That sounds like one hell of a car.
What kind of 5 speed are you using that handles that torque? Im guessing its not a stock T5.  over 500hp and 500ftlbs in a street car thats gotta be fun. Does it have a stock hood? Man you could have some fun beating up SS camaros. ------------------
'68 coupe 289 C code
66 heads, edel 600cfm carb, performer intake, dual exhaust
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blown 351
Journeyman Posts: 68
From: Seattle, Wa. 98258
Registered: Dec 2001
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posted 06-11-2003 01:30 PM
The trans is a 3550 Tremec, not the TKO with the larger input shaft. I don't speed shift like a banshee, as it won't hook on the drag radials anyway.
The 3550 is holding behind a few blower cars I've built for customers putting 660 and 685 RWHP, and they drive like maniacs. So far for me it's been 3 years with no problems.
It was a stock hood, until last year when I went with a slightly taller carb bonnet, and then I switched to a fiberglass 1967 shelby hood. The taller bonnet picked up 32HP.
The 9" rear has a 9+ center section with 3.73:1 Traclock 31 spline curries,
and naturally this engine is built for boosted application.
I blasted a Z06 vette about a month ago, and I'm sure he took his car to the dealer saying it must not be running right, for how could this have happened??
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grandestang
Gearhead Posts: 374
From: Lake Bluff, Illinois USA
Registered: Jan 2003
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posted 06-12-2003 12:07 AM
Blown 351 that sounds like an awesome car. I just had butt in and say that, sorry for taking up space but that car is everything that I would want according to the description. 68 fastback (my favorite body style), 351 windsor (my favorite mustang engine) stroked to 393 with a supercharger! I don't know you could top that. Do you have pictures? If not it would be awesome to see some!Paul ------------------
1970 Grande
H code 351W FMX
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blown 351
Journeyman Posts: 68
From: Seattle, Wa. 98258
Registered: Dec 2001
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posted 06-16-2003 01:31 PM
Thanks.
I have some photos I'll try to post.
No doubt I have too much $$ in the car what with the TCP front end, Baier brakes, suspension, etc.
I'll be at the Northwest Mustangs roundup in Seattle in July.
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indyphil
Gearhead Posts: 2354
From: Senoia, G.A. USA
Registered: Jul 2002
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posted 06-16-2003 02:58 PM
You say you have "too much" $$ in the car, but your set up sounds a lot like the "shelby GT500E" they started selling for 80,000 dollars (and that was for a 302 engined version).
The blown 351 version was over 100,000.Its all relative.
Your car does sound a lot like my dream car. I also love the 68 fastback and the blown stroked windsor. Only thing left to try is a little squirt of giggle gas. Something tells me it just doesnt need it though. ------------------
'68 coupe 289 C code
66 heads, edel 600cfm carb, performer intake, dual exhaust
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blown 351
Journeyman Posts: 68
From: Seattle, Wa. 98258
Registered: Dec 2001
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posted 06-16-2003 04:48 PM
One of our local customers is running a 12 psi boosted stroked small block(fuel injected though)568RWHP(approx as I remember), and then put a 50HP shot on and netted 651RWHP.
4 persons in the trunk to keep the tires from spinning on the dyno.
I was really surprised it picked up that much from the spray.
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MrWesson22
Gearhead Posts: 1280
From: Dacula, GA
Registered: Sep 2000
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posted 06-16-2003 10:10 PM
Well, spray does wonders on a FI engine because it has the normal effects of n2o but also acts like a quite efficient chemical intercooler.  Those are definately impressive numbers.
------------------
Neal 69 Gulfstream Aqua Grande
351C/4sp
https://mustangsandmore.com/ubb/MrWesson22.html
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markboss
Journeyman Posts: 37
From: orlando,fl,usa
Registered: Apr 2003
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posted 06-17-2003 08:38 AM
I have a 67 Shelby GT350 with a Paxton, It is a great combination. Big block H.P. without the extra 300 lbs on the nose of the car.
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