www.the351cforum.com

ALL things related to the Ford 351C
It is currently Sun Nov 18, 2018 2:32 pm

All times are UTC - 5 hours




Post new topic Reply to topic  [ 42 posts ]  Go to page 1, 2, 3, 4, 5  Next
Author Message
PostPosted: Wed Feb 07, 2018 9:22 am 
Offline

Joined: Thu Dec 29, 2016 12:53 pm
Posts: 13
I want you guys to know that this build is for my 14 year old son's first car, 1973 Mach 1. The car will have fuel injection and overdrive. The rear gear ratio is 3.50 with traction lock. I plan on building the AOD with the wide band conversion. The car will keep all creature comforts like A/C, power steering, and power brakes. My calculations say with .025 off the block, .010 off the heads, and a .040 head gasket the static compression will be about 9.25:1-9.3:1. I am hoping the below parts together will create a solid 350-375hp on pump gas. Please give your honest opinions.

1973 CJ block (bored 4.030, line honed, decked .025, new cam bearings, new freeze plugs...)
Factory rods (resized and ARP bolts installed)
H555CP flat top pistons
4MAB STD/STD crankshaft
Balanced rotating assembly

1973 D3ZE heads (.010 surface, Ferrea 2.065/1.65 valves, bronze guides)
- Crane stud conversion kit
- Competition Cams 1.73:1 roller rockers
- Howards springs, locks, and retainers with cam kit
Howards Street Force 2 cam kit (215/225 @ .050, 513/536 lift, 112 LSA, 106CL)

Torker or Performer RPM (I have read throttle body fuel injection systems prefer single plane intakes)
Petronix or MSD ignition

1.750"-2" primary tube header
2.5" Pypes exhaust with X-pipe


Top
 Profile  
 
PostPosted: Wed Feb 07, 2018 9:37 am 
Online

Joined: Mon Oct 29, 2012 9:05 am
Posts: 2416
You'll be at 350 hp no matter which way you go.

I'd go with the Performer RPM intake. The major drawback of a 4V head is the intake port volume. Anything you can do to help the engine overcome the task of getting that large volume of air moving will be beneficial.

The duration on the cam is in the close ballpark, but the LSA needs tightened up. You'll have a lot of vacuum with a cam that small and it would be beneficial for you to go to a 109-110 LSA just to help with getting that air moving.

With that being said, a lazier engine could play to your advantage with a new driver....

What a cool dad to have, I'm sure your son will appreciate every bit of it.

_________________
Brent Lykins, Lykins Motorsports
www.lykinsmotorsports.com
brent@lykinsmotorsports.com


Top
 Profile  
 
PostPosted: Wed Feb 07, 2018 10:02 am 
Offline

Joined: Thu Dec 29, 2016 12:53 pm
Posts: 13
blykins wrote:
You'll be at 350 hp no matter which way you go.

I'd go with the Performer RPM intake. The major drawback of a 4V head is the intake port volume. Anything you can do to help the engine overcome the task of getting that large volume of air moving will be beneficial.

The duration on the cam is in the close ballpark, but the LSA needs tightened up. You'll have a lot of vacuum with a cam that small and it would be beneficial for you to go to a 109-110 LSA just to help with getting that air moving.

With that being said, a lazier engine could play to your advantage with a new driver....

What a cool dad to have, I'm sure your son will appreciate every bit of it.


Blykins,
Thanks, I appreciate your suggestions. The Performer RPM is my choice of intakes to run even though I have the Torker on hand. Howards makes a Street Force 3 cam which is 225/235 @ .050 with 536/542 lift. It is still ground on a 112LSA and 108CL. Would that be a better choice? I just do not want to struggle with the power accessories. What is your opinion on the D3ZE heads? I have read mixed reviews. I do know the Super Stock community really likes that casting.


Top
 Profile  
 
PostPosted: Wed Feb 07, 2018 10:20 am 
Online

Joined: Mon Oct 29, 2012 9:05 am
Posts: 2416
The camshaft will make or break a Cleveland. It's one of those engines where the cylinder heads demand unique specs in order for everything to be right in the world.

I don't think you need more duration....as a matter of fact, more duration would just make more horsepower and extend the rpm range up higher, which may be a negative thing for a new driver.

I would get back closer to your first choice as far as duration, but I would tighten the LSA up to help things along. With small cams, tightening the LSA up won't hurt anything as far as vacuum or running accessories.

You also have to watch about running shorter advertised duration camshafts with flat top pistons and factory heads. You could possibly up with a combo that's not pump gas friendly.

We can think through this a little bit....

If you take a 75cc head and took 2cc off of it from milling, you'd be at around a 73cc chamber. The piston is a 2cc flat top. Pistons should be at around zero deck if you cut .025" off the block. That should put you at around 9.75:1.

If I were grinding a hydraulic flat tappet camshaft for this engine, it would be 219/227 @ .050" with a 275/276 advertised duration. 110 LSA on a 104 ICL. This would give 55.5° of overlap, which would still give you a tremendous amount of vacuum, but would help with the lazier intake port of a 4V head. Lift would be .534"/.533". It would be low-octane friendly.

_________________
Brent Lykins, Lykins Motorsports
www.lykinsmotorsports.com
brent@lykinsmotorsports.com


Top
 Profile  
 
PostPosted: Wed Feb 07, 2018 3:28 pm 
Offline

Joined: Thu Dec 29, 2016 12:53 pm
Posts: 13
Blykins,
An earlier choice of mine for a camshaft was the Lunati VooDoo 10320702: 219/227 @.050, 540/552 lift, LSA 112, ICL 108.


Top
 Profile  
 
PostPosted: Wed Feb 07, 2018 3:37 pm 
Online

Joined: Mon Oct 29, 2012 9:05 am
Posts: 2416
Getting closer..... :D

The tighter LSA and (just as important) the early intake centerline will make a big difference in driving manners.

_________________
Brent Lykins, Lykins Motorsports
www.lykinsmotorsports.com
brent@lykinsmotorsports.com


Top
 Profile  
 
PostPosted: Wed Feb 07, 2018 4:19 pm 
Online

Joined: Mon Oct 29, 2012 9:05 am
Posts: 2416
BTW, those Voodoo lobes are pretty aggressive. The advertised duration is only 262/268. It would probably put you in a rough spot with pump gas.

_________________
Brent Lykins, Lykins Motorsports
www.lykinsmotorsports.com
brent@lykinsmotorsports.com


Top
 Profile  
 
PostPosted: Thu Feb 08, 2018 12:14 pm 
Offline

Joined: Tue Nov 06, 2012 12:02 pm
Posts: 276
What about this one from lunati.

#10320508
Old #31108LUN
Advertised Duration (Int/Exh): 275/290
Duration @ .050 (Int/Exh): 225/240
Gross Valve Lift (Int/Exh): .550/.560
LSA/ICL: 110/106
Valve Lash (Int/Exh): Hyd/Hyd
RPM Range: 2200-5000


Top
 Profile  
 
PostPosted: Thu Feb 08, 2018 12:25 pm 
Online

Joined: Mon Oct 29, 2012 9:05 am
Posts: 2416
Way too much duration split.

_________________
Brent Lykins, Lykins Motorsports
www.lykinsmotorsports.com
brent@lykinsmotorsports.com


Top
 Profile  
 
PostPosted: Thu Feb 08, 2018 3:30 pm 
Offline

Joined: Tue Nov 06, 2012 10:23 am
Posts: 934
Location: Texas
You should just get Brent to order a custom cam for you. He knows what he's doing and you will be much happier. I am with the cam he ordered for me. It's really not any more expensive either.


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 42 posts ]  Go to page 1, 2, 3, 4, 5  Next

All times are UTC - 5 hours


Who is online

Users browsing this forum: No registered users and 1 guest


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB® Forum Software © phpBB Group