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Author
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Topic: Changed from 750 Holley to 850
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ZEATER
Gearhead Posts: 180
From: Mount Pleasant,IA,USA
Registered: Aug 2001
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posted 02-25-2002 03:32 PM
   
It was 70 degrees here in Iowa yesterday so I decided to try the 850. I made three runs with the g tech performance computer to get a top horsepower reading. I left the g tech on and calibrated and changed to the 850. The 850 was out of the box with 78 jets front and back. I did change the power valves and added jet extensions. The run showed an increase of 22 horsepower (rear wheels). I will be taking to a chassis dyno this spring to dial in better but this is promising.The engine is a 428 10.6 compression, comp cams 292 H cam with 244/244 @ .050 .560/.560 lift, Blue thunder intake, tri y headers, roller rockers. Thanks to those who offered the 850 advice.
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Moneymaker
Administrator Posts: 27499
From: Lyons, IL, USA
Registered: May 99
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posted 02-25-2002 04:18 PM
Now if you got some 4 tube headers.......
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Alex Denysenko
Co-Administrator and Moderator/ non 65-66 Mustang owner sensitivity co-ordinator NHRA/IHRA/SRA member
NHRA and IHRA SS/LA National Record Holder '00, '01, & '02
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28
Part time secret agent license #0089
US Class Nationals link
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68F100
Gearhead Posts: 2681
From: Burlington, Iowa
Registered: Oct 99
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posted 02-25-2002 04:51 PM
Welcome to M&M ZEATER. I'm just down the road a bit from you. I'm in Fort Madison. Too bad it's cold today. ------------------
Joe Wellman
1968 F-100 302/c4/9" 3.50
1977 F-150 400M/c6/9" 3.25
1994 Escort LX-It's a Ford and gets 42 MPG
https://mustangsandmore.com/ubb/68F100.html
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ZEATER
Gearhead Posts: 180
From: Mount Pleasant,IA,USA
Registered: Aug 2001
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posted 02-25-2002 05:26 PM
I was told to install the tri y's for fit and performance. They are ceramic coated and I guess a compromise. I ran best of 12.6 @ 107 last year. Went with carb, rancho shocks and changing from 3.91 gears to 4.11 this year. I'll let you know how it turns out.Maybe I should have gone solid roller. I do drive to car shows and cruise nights and only race two or three times a year so there are compromises.
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Moneymaker
Administrator Posts: 27499
From: Lyons, IL, USA
Registered: May 99
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posted 02-25-2002 05:30 PM
On a BBF FE fit maybe but, performance no way. Still a scoche better than CJ exhaust manifolds but no Hooker 4 tube SC's.  ------------------
Alex Denysenko
Co-Administrator and Moderator/ non 65-66 Mustang owner sensitivity co-ordinator NHRA/IHRA/SRA member
NHRA and IHRA SS/LA National Record Holder '00, '01, & '02
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28
Part time secret agent license #0089
US Class Nationals link
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ZEATER
Gearhead Posts: 180
From: Mount Pleasant,IA,USA
Registered: Aug 2001
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posted 02-26-2002 01:49 PM
I'm guessing the move to 4.11 gears is correct? I know it is only 200 rpm difference but I thought it would help launch. I do have a wide ratio top loader so the first gear is pretty low.
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Moneymaker
Administrator Posts: 27499
From: Lyons, IL, USA
Registered: May 99
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posted 02-26-2002 05:39 PM
4.30 would be better but at least you are going in the right direction. ------------------
Alex Denysenko
Co-Administrator and Moderator/ non 65-66 Mustang owner sensitivity co-ordinator and 69-70 a$$ kicker NHRA/IHRA/SRA member
NHRA and IHRA SS/LA National Record Holder '00, '01, & '02
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28
Part time secret agent license #0089
US Class Nationals link
IP: Logged |
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