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  Changed from 750 Holley to 850

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Author Topic:   Changed from 750 Holley to 850
ZEATER
Gearhead

Posts: 180
From: Mount Pleasant,IA,USA
Registered: Aug 2001

posted 02-25-2002 03:32 PM     Click Here to See the Profile for ZEATER   Click Here to Email ZEATER     Edit/Delete Message   Reply w/Quote
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

posted 02-25-2002 04:18 PM     Click Here to See the Profile for Moneymaker   Click Here to Email Moneymaker     Edit/Delete Message   Reply w/Quote
Now if you got some 4 tube headers.......

------------------
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

posted 02-25-2002 04:51 PM     Click Here to See the Profile for 68F100   Click Here to Email 68F100     Edit/Delete Message   Reply w/Quote
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

posted 02-25-2002 05:26 PM     Click Here to See the Profile for ZEATER   Click Here to Email ZEATER     Edit/Delete Message   Reply w/Quote
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

posted 02-25-2002 05:30 PM     Click Here to See the Profile for Moneymaker   Click Here to Email Moneymaker     Edit/Delete Message   Reply w/Quote
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

posted 02-26-2002 01:49 PM     Click Here to See the Profile for ZEATER   Click Here to Email ZEATER     Edit/Delete Message   Reply w/Quote
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

posted 02-26-2002 05:39 PM     Click Here to See the Profile for Moneymaker   Click Here to Email Moneymaker     Edit/Delete Message   Reply w/Quote
4.30 would be better but at least you are going in the right direction.

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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

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