Carolina Broncos › 66-96 Ford Broncos › Bronco Tech v
Cam advice....

Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
Threaded Mode
Cam advice....
blazinchuck Offline
Administrator
*******
Posts: 6,190
Threads: 511
Joined: Oct 2005
Reputation: 0
#21
01-26-2011, 10:33 AM
yeah, but i would think mild upgrades wont push the motor over the edge. i would really like to do something also. like a better cam in the 306 and a better one in the 5.0
77 built 306,Trickflow Cam/Alum Heads/dome pistons/10:1comp,nv3550,duff long arms,3.5" lift,family cage,protofab rear bumper,twin sticked, and 35KM2'sG.D.I.
Find
Reply
blazinchuck Offline
Administrator
*******
Posts: 6,190
Threads: 511
Joined: Oct 2005
Reputation: 0
#22
01-26-2011, 10:38 AM
one other thought...Aaron, whatcha think about advancing the cam?? i have the cam spec sheet at home and it list advancing it so many degrees. right now, its straight up
77 built 306,Trickflow Cam/Alum Heads/dome pistons/10:1comp,nv3550,duff long arms,3.5" lift,family cage,protofab rear bumper,twin sticked, and 35KM2'sG.D.I.
Find
Reply
bucketobolts Offline
Posting Freak
*****
Posts: 1,319
Threads: 42
Joined: Oct 2006
Reputation: 0
#23
01-26-2011, 10:54 AM
Advancing cam time moves the torque range down about 200 rpm for each degree and advancing moves the torque up about 200 rpm for each degree, roughly speaking. When I first bought my '93 LX back in the day, I installed the 1.7 rockers and retarded the cam time 4*. This allowed me to pull 4.10 gears through the 1/8th mile in 3rd gear. But for the labor involved, I believe it is more worth while to swap the cam rather than advancing the stock.


My personal preference is a long flat torque curve. The FRPP alphabet cams are proven and are still good grinds. And remember the XE270HR grind has about .544" of lift. Which may require fly cutting for piston clearance.
'72 TBA...
Find
Reply
chuzie Offline
Administrator
*******
Posts: 4,530
Threads: 131
Joined: Nov 2005
Reputation: 0
#24
01-26-2011, 12:03 PM
I am definitely leaning towards the E303 now.
'77 351w- Explorer EFI, 4R70W, 4-link, lockers, 4.56, 35" MT/Rs with a severe rock addiction.Confusedmokin:
Roads? Where we're going, we don't need roads.

[Image: sig2.jpg]
Website Find
Reply
Timstrk Offline
Senior Member
****
Posts: 402
Threads: 38
Joined: Feb 2006
Reputation: 0
#25
01-26-2011, 10:58 PM
How much piston machining do you have to do to clear the valves with over .5" of lift. I thought the small blocks were pretty close from there on up.

Tim
74 Bronco Ranger halfcab w/toys: lockers f&r, wristed arm, C4, D20, hyd assist steering, 37"MTRs, warm 302. Capability, that's what I'm talkin' bout.
[Image: 2rwp56f.png]
Find
Reply
chuzie Offline
Administrator
*******
Posts: 4,530
Threads: 131
Joined: Nov 2005
Reputation: 0
#26
01-27-2011, 12:02 AM
The E303 is designed to work with a stocker though the real HP gain is not experienced until the heads are replaced.
'77 351w- Explorer EFI, 4R70W, 4-link, lockers, 4.56, 35" MT/Rs with a severe rock addiction.Confusedmokin:
Roads? Where we're going, we don't need roads.

[Image: sig2.jpg]
Website Find
Reply
bucketobolts Offline
Posting Freak
*****
Posts: 1,319
Threads: 42
Joined: Oct 2006
Reputation: 0
#27
01-27-2011, 10:16 AM
From my experiences stock heads with stock size valves are well clearance with the stock pistons. Only valve clearance problems would be with E5 & E6 heads on a '85-86 block. Theses had smaller chambers and flattop pistons.

It would also be wise to upgrade the valve springs and timing chain while your in the motor. Also remember these #'s were calculated using 10:1 compression and 4.030 bore.
'72 TBA...
Find
Reply
blazinchuck Offline
Administrator
*******
Posts: 6,190
Threads: 511
Joined: Oct 2005
Reputation: 0
#28
01-31-2011, 10:24 PM
ok Aaron, what does our 306 come up with on your program?

302 bored .30 over, roller motor,1.6 roller rockers,trick flow alum heads,alum intake-port match to intake. has a 600 holley w/vac sec. but it has drilled out jets,larger squirters.L&L nickle long tube headers. i attached the cam spec sheet


Attached Files Image(s)
   
77 built 306,Trickflow Cam/Alum Heads/dome pistons/10:1comp,nv3550,duff long arms,3.5" lift,family cage,protofab rear bumper,twin sticked, and 35KM2'sG.D.I.
Find
Reply
bucketobolts Offline
Posting Freak
*****
Posts: 1,319
Threads: 42
Joined: Oct 2006
Reputation: 0
#29
02-01-2011, 09:42 AM
Do you know what the compression is?
'72 TBA...
Find
Reply
blazinchuck Offline
Administrator
*******
Posts: 6,190
Threads: 511
Joined: Oct 2005
Reputation: 0
#30
02-01-2011, 09:52 AM
yeah, sorry...10:1
77 built 306,Trickflow Cam/Alum Heads/dome pistons/10:1comp,nv3550,duff long arms,3.5" lift,family cage,protofab rear bumper,twin sticked, and 35KM2'sG.D.I.
Find
Reply


Possibly Related Threads…
Thread Author Replies Views Last Post
  What to do advice Phoneman 5 3,086 05-14-2014, 05:56 PM
Last Post: Phoneman
  A little advice rancej 5 1,752 03-19-2011, 11:53 PM
Last Post: rancej
  Need Advice on 351W Headers 73Bronc 9 3,425 10-15-2009, 12:04 PM
Last Post: wormhole
  Need advice on tube flaring problem... chuzie 8 1,597 08-28-2009, 05:42 PM
Last Post: 66stocker
  power steering set up advice ?????? broncomania 6 5,247 04-09-2009, 06:44 PM
Last Post: broncomania
  need some parts and advice offshorecorley 1 3,061 12-03-2008, 08:21 PM
Last Post: offshorecorley
  Engine build advice cuz1 6 1,585 06-27-2008, 05:35 PM
Last Post: bucketobolts
  NEED SOME ADVICE PLEASE DUCKWORTH71/76 24 7,648 06-17-2008, 10:28 PM
Last Post: blazinchuck
  Need some advice johnpaulgolf 31 7,551 05-27-2008, 09:06 PM
Last Post: chuzie

Forum Jump:


Users browsing this thread: 2 Guest(s)