Re: 25 MPG with a 408 ??? Yup!!
[Re: hooziewhatsit]
#500586
10/18/09 10:14 PM
10/18/09 10:14 PM
|
Joined: Dec 2004
Posts: 1,061 New Mexico
dmerc
OP
super stock
|
OP
super stock
Joined: Dec 2004
Posts: 1,061
New Mexico
|
Here's the recipe: Magnum heads with tight quench .030. Bowls opened up. Stock valve job. Wiesco dished pistons Mopar Performance M1 Dual plane intake Roller cam Compcams #20-000-9 506 lift 216 intake 224 exhaust duration. Mopar orange box. 340 HP manifolds with a TTI 2 1/2 inch exhaust system. Distributor that I recurved for timing all in at 2000 RPM. This is a big one: Thermoquad 850 carb. Best carb I've tried and I've tried them all. 700R4 Chevy trany with converter lockup. But any overdrive trans would work. 3.23 8 3/4 rear end Aluminum radiator with electric fans. Fans don't operate at anything over 40 MPH so you gain at least 1 MPG with that mod.
Last edited by dmerc; 10/18/09 10:34 PM.
|
|
|
Re: 25 MPG with a 408 ??? Yup!!
[Re: dmerc]
#500588
10/18/09 10:25 PM
10/18/09 10:25 PM
|
Joined: Nov 2003
Posts: 36,040 Lincoln Nebraska
RapidRobert
Circle Track
|
Circle Track
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
|
What is your (measured) CR and what gas?
live every 24 hour block of time like it's your last day on earth
|
|
|
Re: 25 MPG with a 408 ??? Yup!!
[Re: dmerc]
#500592
10/18/09 10:38 PM
10/18/09 10:38 PM
|
Joined: Aug 2005
Posts: 6,003 Salem
Grizzly
Moparts Proctologist
|
Moparts Proctologist
Joined: Aug 2005
Posts: 6,003
Salem
|
You did it! I'm going to be optimistic and say you will hit somewhere between 12.8 and 13.2 seconds in the quarter. Now let's see.... Skinny tires, lower it, and 3.08's; sounds like 27mpg to me?
Mo' Farts
Moderated by "tbagger".
|
|
|
Re: 25 MPG with a 408 ??? Yup!!
[Re: Mr.Yuck]
#500597
10/21/09 08:11 PM
10/21/09 08:11 PM
|
Joined: Mar 2005
Posts: 1,545 Seattle, WA
375inStroke
Special needs person
|
Special needs person
Joined: Mar 2005
Posts: 1,545
Seattle, WA
|
Quote:
why build a 408 to run 13.5? Who care about mpg...make it run right and you might be able to pull a 13.0.
13.0 MPG?
|
|
|
Re: 25 MPG with a 408 ??? Yup!!
[Re: 375inStroke]
#500598
10/21/09 08:51 PM
10/21/09 08:51 PM
|
Joined: Feb 2009
Posts: 982 W. Sacto CA. USA
phantomx
super stock
|
super stock
Joined: Feb 2009
Posts: 982
W. Sacto CA. USA
|
I'd be interested in the MPH when you run it. Sounds like a good street combo. Travis..
70 GTX project, orig 440-4, 4 spd, track pack, FC7, stripper/street racer special.
|
|
|
Re: 25 MPG with a 408 ??? Yup!!
[Re: phantomx]
#500599
10/21/09 09:01 PM
10/21/09 09:01 PM
|
Joined: Jan 2003
Posts: 9,982 Ansonia, CT
CJK440
master
|
master
Joined: Jan 2003
Posts: 9,982
Ansonia, CT
|
I'm assuming this was mostly, if not all highway??
2017 Contusion Blue Challenger T/A 392 M6 "BLKNBLU"
|
|
|
Re: 25 MPG with a 408 ??? Yup!!
[Re: phantomx]
#500600
10/21/09 09:07 PM
10/21/09 09:07 PM
|
Joined: Dec 2004
Posts: 1,061 New Mexico
dmerc
OP
super stock
|
OP
super stock
Joined: Dec 2004
Posts: 1,061
New Mexico
|
Quote:
I'd be interested in the MPH when you run it. Sounds like a good street combo. Travis..
I'll be taking the Duster to the drags to see what it will do on Sat. I'll report back. Hope I don't blow it up!!
|
|
|
Re: 25 MPG with a 408 ??? Yup!!
[Re: CJK440]
#500601
10/21/09 09:17 PM
10/21/09 09:17 PM
|
Joined: Dec 2004
Posts: 1,061 New Mexico
dmerc
OP
super stock
|
OP
super stock
Joined: Dec 2004
Posts: 1,061
New Mexico
|
Quote:
I'm assuming this was mostly, if not all highway??
All highway except for a little drag race with a mustang on the freeway. (guess who won?)
|
|
|
|
|