Brought to you in part by:

M&M Restoration & Tool Supply Store

Great deals on auto restoration supplies!

.


NOTICE! The old Mustangsandmore.com is a read-only archive.
Currently the Search function is inoperative, but we are working on the problem.

Please join us at our NEW Mustangsandmore.com forums located at this location.
Please notice this is a brand new message board, and you must re-register to gain access.

  Mustangsandmore Forum Archive
  Ford Racing
  351C 4V Roush port stuffers

Post New Topic  Post A Reply
profile | register | preferences | faq | search

next newest topic | next oldest topic
Author Topic:   351C 4V Roush port stuffers
Mpcoluv
Gearhead

Posts: 1421
From: Charlotte NC usa
Registered: Apr 2001

posted 07-08-2002 12:49 PM     Click Here to See the Profile for Mpcoluv        Reply w/Quote
Hi guys,
Just spent yesterday in front of a flow bench.
I tested a spare D3xx open chamber 4V head with unknown valve job and Milodon megaflow valves. First test was just the stock head as a benchmark. second test was with Roush stuffer. Below are the results:

Lift Scale % of scale CFM (stock head)
0.025 1 71.2 24.8
0.050 2 63.2 69.38
0.100 3 55.6 82.88
0.150 3 78 115.44
0.200 4 49.2 145.63
0.250 4 58.7 173.75
0.300 4 65.3 193.288
0.350 4 70.8 209.568
0.400 4 77 227.92
0.450 4 83.1 245.946
0.500 4 87.4 258.704
0.550 4 91.4 270.544
0.600 4 94.2 278.832
0.650 4 96.2 284.752
0.700 4 96.7 286.23
0.750 4 96.5 285.64

Next is the flow data of the intake with the Roush stuffer. Note that this didn't hurt flow much until around .600 valve lift. I think this is due to my testing method which did not use clay to smooth the transition from the tongue to the head near the short side radius. I need to run this test again with the transition smoothed.

Lift %of scale CFM Swirl
0.025 64 22.36
0.050 60.5 42.35
0.100 54.5 80.66 246
0.150 71.8 106.26
0.200 48.5 143.56
0.250 57.3 170.496 33
0.300 65.2 192.99
0.350 70 207.2 322
0.400 74.6 220.82
0.450 79.2 234.423 610
0.500 82.2 243.312 900
0.550 84.4 249.824 1168
0.600 86 254.56 1500
0.650 87.6 259.296 1800
0.700 88 260.48 1900
0.750 89.4 264.264

Maybe later this week I can re-run the Roush stuffer test and then test the new Terry Parker stuffer (which looks like a .100 taller Roush stuffer).


------------------
Jim Sams
'69 mustang Coupe
372C

Rustang
Gearhead

Posts: 880
From: Clarion PA
Registered: Nov 2000

posted 07-08-2002 09:47 PM     Click Here to See the Profile for Rustang        Reply w/Quote
I wish I'd have flow benched my Boss heads before installing the Roush spoons. Non-the-less, I got pretty good flow with them installed:
.100 - 70
.200 - 147
.300 - 213
.400 - 265
.500 - 300
.600 - 310
.700 - 321
This was prior to cleaning up the sharp ridge underneath the valve transition to the chamber, and I really didn't do any blending of the spoon to the port floor on the short side radius.

------------------
'68 mustang 351 clevor- [email protected]
'67 Stang, 351W [email protected]
'69 351C [email protected]
'78 Pickup [email protected]
'79 Pickup 460 ET=??

Mpcoluv
Gearhead

Posts: 1421
From: Charlotte NC usa
Registered: Apr 2001

posted 07-09-2002 05:30 PM     Click Here to See the Profile for Mpcoluv        Reply w/Quote
Rustang,
Your heads were ported right?

Rustang
Gearhead

Posts: 880
From: Clarion PA
Registered: Nov 2000

posted 07-09-2002 06:23 PM     Click Here to See the Profile for Rustang        Reply w/Quote
They have a very good valve job, the pockets were blended, and valve guide streamlined. Also, I raised the top of the port about 1/8" at the intake opening. It's amazing how these heads respond to what's basically basic portwork! Based on your results, I'm just wondering how much affect removing the spoons from my heads would affect the flow

[This message has been edited by Rustang (edited 07-09-2002).]

Mpcoluv
Gearhead

Posts: 1421
From: Charlotte NC usa
Registered: Apr 2001

posted 07-09-2002 09:09 PM     Click Here to See the Profile for Mpcoluv        Reply w/Quote
quote:
Originally posted by Rustang:
They have a very good valve job, the pockets were blended, and valve guide streamlined. Also, I raised the top of the port about 1/8" at the intake opening. It's amazing how these heads respond to what's basically basic portwork! Based on your results, I'm just wondering how much affect removing the spoons from my heads would affect the flow

[This message has been edited by Rustang (edited 07-09-2002).]


I think that you probably wouldn't see much gain and lose some velocity.
Do you need more than 321 cfm?

All times are ET (US)

next newest topic | next oldest topic

Administrative Options: Close Topic | Archive/Move | Delete Topic
Post New Topic  Post A Reply
Hop to:

Contact Us | Mustangsandmore Front Page

Copyright 2006, Steve LaRiviere. All Rights Reserved.


Ultimate Bulletin Board 5.47d

Amazon Honor System Click Here to Pay Learn More

[Build a free Mustangsandmore.ws Home Page!]

[Posting Pictures]

[About M&M][Members' Pics]

[M&M Conventions] [M&M Mug Shots] [Tech Articles]

[M&M Bookstore] [M&M Restoration & Tool Supply Store]