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Author
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Topic: blow-thru windsor
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Fstln69
Gearhead Posts: 314
From: Westmont,il
Registered: Jan 2003
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posted 03-04-2003 07:03 PM
   
I have been kicking this around for a long time and have been lurking on a blowthru board.Do any of you guys out there know or are using a centrifigal blower on a 351w with a carb?My main concerns are how stout the bottom end is going to have to be to take some serious boost.I am more then convinced (though not cheap) that this is the most awesome way to make serious horsepower and stil retain driveabilty.Ok guys this should get interesting(I Hope)
Dennis ------------------
69 fairlane 351w 12.94@103mph before M&M.. after??
always in search of more HP and faster ET'S Fstln69 Pics Page
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Moneymaker
Administrator Posts: 19611
From: Lyons, IL, USA
Registered: May 99
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posted 03-04-2003 07:46 PM
I have done a ton of blow through Fords.
A few dozen Mopars too! 
All were worth the effort and costs associated.
If you keep the boost to around 10 lbs, the bottom end survives just fine.
The major issue is cylinder sealing. Head gaskets and all related hardware must be premium.------------------
Alex Denysenko
Co-Administrator and Moderator NHRA/IHRA/SRA member and licensed Superstock driver
MCA member# 53321
NHRA and IHRA SS/LA National Record Holder '00,'01,'02,&'03
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28
Professional Manwhore
The Barry of BarrysGrrl Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"
www.moneymakerracing.com
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Fstln69
Gearhead Posts: 314
From: Westmont,il
Registered: Jan 2003
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posted 03-04-2003 07:52 PM
Alex,what kind of hp you think you made with blow-thru's?Being the way i am  i do want to build something that i can put more boost to.The reason i bring all this up now was i got a reply on a board that a guy has brackets and pulleys for sale that would save me some money------------------
69 fairlane 351w 12.94@103mph before M&M.. after??
always in search of more HP and faster ET'S Fstln69 Pics Page [This message has been edited by Fstln69 (edited 03-04-2003).]
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Moneymaker
Administrator Posts: 19611
From: Lyons, IL, USA
Registered: May 99
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posted 03-04-2003 08:01 PM
I would guess about 440 to 450 from my 289 with Crane Hipo heads and a 1.12 600 CFM Autolite. It ran 11.60 to 11.70 at 116+ in the 70's at 3300 + lbs.------------------
Alex Denysenko
Co-Administrator and Moderator NHRA/IHRA/SRA member and licensed Superstock driver
MCA member# 53321
NHRA and IHRA SS/LA National Record Holder '00,'01,'02,&'03
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28
Professional Manwhore
The Barry of BarrysGrrl Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"
www.moneymakerracing.com
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Fstln69
Gearhead Posts: 314
From: Westmont,il
Registered: Jan 2003
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posted 03-04-2003 08:18 PM
quote:
Originally posted by Moneymaker:
I would guess about 440 to 450 from my 289 with Crane Hipo heads and a 1.12 600 CFM Autolite. It ran 11.60 to 11.70 at 116+ in the 70's at 3300 + lbs.
Just think what can be done with todays technology.I know building the bottom will be a "little costly"  to handle 15 to 20 lbs of boost but this is turning into an obsession of mine(god i'm twisted lol)and the look on peoples faces when they see a wheelstanding small block 69 FAIRLANE  would be priceless(think im going batty from all the snow)
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69 fairlane 351w 12.94@103mph before M&M.. after??
always in search of more HP and faster ET'S
Fstln69 Pics Page [This message has been edited by Fstln69 (edited 03-04-2003).]
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ccode67
Gearhead Posts: 1549
From: douglasville,ga,usa
Registered: Mar 2001
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posted 03-06-2003 08:32 AM
I've thought of putting a Paxton on my 351W, but I worry about the compression being too high, it's just under 10 to 1 ( 9.89).
It does have premium parts , TRW forged pistons, Edelbrock heads etc..Whats the highest compression a street motor with a blower would live with???? ------------------
Stuart
MCA #48902
M&M #1091
67 stang 5 speed, 351W,
Edelbrock Performer RPM package my photo page
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65_289
Gearhead Posts: 757
From:
Registered: Jul 2001
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posted 03-06-2003 10:08 AM
quote:
Originally posted by ccode67:
I've thought of putting a Paxton on my 351W, but I worry about the compression being too high, it's just under 10 to 1 ( 9.89).
It does have premium parts , TRW forged pistons, Edelbrock heads etc..Whats the highest compression a street motor with a blower would live with????
I don't know the exact answer to that, but an intercooler will help out quite a bit. That said, I don't think the Paxton units allow for one...
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BlueMule
Gearhead Posts: 754
From: Kent Island, MD USA
Registered: Sep 2002
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posted 03-06-2003 10:26 AM
Proper ignition timing and fuel mixture are critical when under boost too.------------------
-Paul 70 Mach1 351C
79 Ranchero GT
97 Expedition XLT 5.4
00 SVT f150 Lightning 4149 of 4966 Born on: 06/26/2000 'life's tough... it's tougher if you're stupid.'
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Moneymaker
Administrator Posts: 19611
From: Lyons, IL, USA
Registered: May 99
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posted 03-06-2003 12:40 PM
I had about 13 to 1 compression with my Paxton. ------------------
Alex Denysenko
Co-Administrator and Moderator NHRA/IHRA/SRA member and licensed Superstock driver
MCA member# 53321
NHRA and IHRA SS/LA National Record Holder '00,'01,'02,&'03
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28
Professional Manwhore
The Barry of BarrysGrrl Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"
www.moneymakerracing.com
IP: Logged |
blown 351
Journeyman Posts: 55
From: Seattle, Wa. 98258
Registered: Dec 2001
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posted 03-06-2003 03:21 PM
Yes, I am running a blow-through on a stroked windsor.
The 393 gets 7 lbs from a procharger P600b, making 533hp and 541lb ft at the rear wheels.
It's de-tuned for the street and usually runs on pump gas-except when racing,
Prior to the stroker, I ran 7 lbs on a 69 stock cid winsor bottom end. The stock winsor bottom end can take it. De-burr as much of the block casting as you can, and run a high quality bearing, such as Clevite.
Have the rods checked for trueness, and peened, and use ARP studs. If you want to run say above 8 lbs, it would do you good to put a girdle on it.
Put a just a little bit more ring gap in when assembling, and use head studs. You'll be fine. You may have to de-tune it for the street depending on the static compression you want to run.
Naturally, it would be smart to get the fuel delivery system, and ignition system up to the task.
It will be fine until you get greedy.
When you run a blower car, all there is really to do is dial in more timing, and smaller pulleys.
I'll see if if I can get a picture on here if someone's interested.
Until you
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blown 351
Journeyman Posts: 55
From: Seattle, Wa. 98258
Registered: Dec 2001
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posted 03-06-2003 03:36 PM
15-20 lbs of boost on even a mild windsor would be lethal.
I don't think you would ever get traction on the street.
As it is with 7 lbs on an aluminum headed 393, I can blow off the tires at will in any gear but 5th.
It would survive just fine if you built about 8.25:1 compression with an intercooler, but it would be be pretty intense to try and handle on the street when you nailed it.
9.89:1 is not really too high. Keep the boost down about 6lbs, set about 11 degrees initial, and say around 28 total timing, and it should'nt ping on premium. My other 351 was right about 9.8:1 without an intercooler, and I had no problems with Chevron premium.
Intercool, and you can go up to 18++ lbs. I see it about once a week.
The Novi is a pretty good cent. blower, but I think the older Paxtons are antiquated with the ball bearing drives.
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Moneymaker
Administrator Posts: 19611
From: Lyons, IL, USA
Registered: May 99
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posted 03-06-2003 06:25 PM
quote:
Originally posted by blown 351:
I think the older Paxtons are antiquated with the ball bearing drives.
Just like me I guess. 
------------------
Alex Denysenko
Co-Administrator and Moderator NHRA/IHRA/SRA member and licensed Superstock driver
MCA member# 53321
NHRA and IHRA SS/LA National Record Holder '00,'01,'02,&'03
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28
Professional Manwhore
The Barry of BarrysGrrl Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"
www.moneymakerracing.com
IP: Logged |
Fstln69
Gearhead Posts: 314
From: Westmont,il
Registered: Jan 2003
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posted 03-06-2003 07:33 PM
Eventually i do want to build a motor capable of handling BIG boost but i know the motor that i have now i couldn't run with any serious boost.I have flatops in the windsor with 69 castings,i know the piston is in the hole but how much im not sure.I'm in the process of wheeling a deal with a guy to buy brackets pulleys and inlet pipes from a D-1 procharger all for a carbed windsor.Ignition system is covered just have the fule system to do and change cams WHEN the time comes to put the blower on.Hey Blown you have any detailed pics of your motor i'd like to get an idea how all this will fit and look.Also i will be looking for a D-1 compressor so guys keep your ears out ------------------
69 fairlane 351w 12.94@103mph before M&M.. after??
always in search of more HP and faster ET'S Fstln69 Pics Page
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blown 351
Journeyman Posts: 55
From: Seattle, Wa. 98258
Registered: Dec 2001
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posted 03-07-2003 08:51 AM
Alex,
I wouldn't exactly call anyone who's making over 471 on a N/A 289 antiquated.It's just my darn walker that gets in the way.
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