Posts: 1,319
Threads: 42
Joined: Oct 2006
Reputation:
0
The FRR E303 is a pretty mild cam that doesn't loose a lot of bottom end torque. The bumpity-bump idle is greatly affected by compression. The higher the compression the more "blow back" you get during valve overlap causing the exhaust note.
I believe if you spend enough time planning the right combination of pieces, you can get a nice sounding idle and great offroad power.
'72 TBA...
Posts: 4,530
Threads: 131
Joined: Nov 2005
Reputation:
0
Thanks for the info. Are you volunteering? I don't know jack about this stuff. All my engines have always been stock. This engine, stock, should have 9.0:1 compression.
'77 351w- Explorer EFI, 4R70W, 4-link, lockers, 4.56, 35" MT/Rs with a severe rock addiction. mokin:
Roads? Where we're going, we don't need roads.
![[Image: sig2.jpg]](http://i288.photobucket.com/albums/ll176/mchuzie/sig2.jpg)
Posts: 1,319
Threads: 42
Joined: Oct 2006
Reputation:
0
01-19-2011, 10:22 PM
(This post was last modified: 01-19-2011, 10:33 PM by bucketobolts.)
I don't mind helping. Before I built the 393W for my rig (in snipes243 now) I had a plan for a 302 with pretty much stock heads and bottom end that should pump out about 300ftlbs of torque from 2k-5k. And it would have a wicked idle. Not sure if that is the direction you want or not.
![[Image: DecktopDyno302stockheads.jpg]](http://i96.photobucket.com/albums/l166/Bucketobolts/Desktop%20Dyno/DecktopDyno302stockheads.jpg)
'72 TBA...
Posts: 4,530
Threads: 131
Joined: Nov 2005
Reputation:
0
That is what I am going for. That is some sweet torque values in the low range. Any way the mid range HP can me moved down about 500-1000 RPM? Is this the FRR E303?
'77 351w- Explorer EFI, 4R70W, 4-link, lockers, 4.56, 35" MT/Rs with a severe rock addiction.mokin:
Roads? Where we're going, we don't need roads.
Posts: 1,319
Threads: 42
Joined: Oct 2006
Reputation:
0
01-21-2011, 09:29 AM
(This post was last modified: 01-21-2011, 09:33 AM by bucketobolts.)
That is my "secret weapon" cam. The particular simulation was a flat tappet cam with EB heads. I'll tinker with some different cam grinds and see what we can come up with. BTW...That engine would be more of a "Welch" style engine meant to be driven with the balls out.
Also if I remember correctly, the engine that used to be in Carl's burgundy Bronco was a late model roller with Trick Flow heads and cam. Turn up the volume and watch the video...
Carl's hill climb
'72 TBA...
Posts: 884
Threads: 25
Joined: Sep 2010
Reputation:
0
bucketobolts Wrote:That is my "secret weapon" cam. The particular simulation was a flat tappet cam with EB heads. I'll tinker with some different cam grinds and see what we can come up with. BTW...That engine would be more of a "Welch" style engine meant to be driven with the balls out.
Also if I remember correctly, the engine that used to be in Carl's burgundy Bronco was a late model roller with Trick Flow heads and cam. Turn up the volume and watch the video...
Carl's hill climb
DAYUM THAT SOUNDS SWEEEEET!!!!:clap:
Posts: 4,530
Threads: 131
Joined: Nov 2005
Reputation:
0
Now THAT is what I am talking about!!!
'77 351w- Explorer EFI, 4R70W, 4-link, lockers, 4.56, 35" MT/Rs with a severe rock addiction.mokin:
Roads? Where we're going, we don't need roads.
Posts: 1,319
Threads: 42
Joined: Oct 2006
Reputation:
0
Here are a few charts for a .030 over 10:1 short block with stock E7 casting heads and roller cams. I looked up the Comp 266HR, B303, E303, Stage 1 Trick Flow, and Comp XE270HR. All should have a little bump to the idle with the exception of the 266HR, but should work with a stock converter.
I like the torque curve of both the B303 and the E303. The XE270 made more horsepower, but looks like it may be lacking below 2k rpm.
Comp266HR
![[Image: 302E7266HR.jpg]](http://i96.photobucket.com/albums/l166/Bucketobolts/Desktop%20Dyno/302E7266HR.jpg)
Trick Flow Stage 1
![[Image: 302E7Stg1TrickFlow.jpg]](http://i96.photobucket.com/albums/l166/Bucketobolts/Desktop%20Dyno/302E7Stg1TrickFlow.jpg)
B303
![[Image: 302E7B303.jpg]](http://i96.photobucket.com/albums/l166/Bucketobolts/Desktop%20Dyno/302E7B303.jpg)
E303
![[Image: 302E7E303.jpg]](http://i96.photobucket.com/albums/l166/Bucketobolts/Desktop%20Dyno/302E7E303.jpg)
Comp XE270HR
![[Image: 302E7XE270HR.jpg]](http://i96.photobucket.com/albums/l166/Bucketobolts/Desktop%20Dyno/302E7XE270HR.jpg)
'72 TBA...
Posts: 6,190
Threads: 511
Joined: Oct 2005
Reputation:
0
01-26-2011, 10:13 AM
(This post was last modified: 01-26-2011, 10:30 AM by blazinchuck.)
this is starting to sound like our 306, however the cam aint that impressive...more like a RV cam. I think Shawn's mustang 306 has a e303 cam in it...sounds sweet
http://www.youtube.com/watch?v=VNwO4Fo6QLM
correction, shawn just told me its a wolverine which is close to the F303 about .510-.512 lift, a e303 is about .498 lift
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.
Posts: 4,530
Threads: 131
Joined: Nov 2005
Reputation:
0
I think the E303 or the Comp XE270HR would be the best choices from this list considering the HP and torque levels. Again, I am running a stock 302HO with an unknown time and mileage since rebuild (if any). Jdowns brought a valid point to the table about throwing the engine over the edge with performance upgrades. Does anyone else hae any further thoughts on that subject?
'77 351w- Explorer EFI, 4R70W, 4-link, lockers, 4.56, 35" MT/Rs with a severe rock addiction.mokin:
Roads? Where we're going, we don't need roads.
|
