Is this cam to radical for a 331 Stroker street driver?
06-04-2008, 05:34 PM
#1
Thread Starter
Join Date: Oct 2006
Location:
Posts: 46
Is this cam to radical for a 331 Stroker street driver?
Already have Edlbrock RPM heads (60229) 1.9/1.6
Edelbrock #2281
ENGINE: FORD 351W
RPM RANGE: 1500-6500
Duration at 0.006" Lift:Intake: 299° Exhaust: 302°
Duration at 0.050" Lift:Intake: 235° Exhaust: 238°
Lift at Cam:Intake: 0.358" Exhaust: 0.364"
Lift at Valve:Intake: 0.573" Exhaust: 0.582"
Intake:11° BTDC 44° ABDC
Exhaust:56° BBDC 2° ATDC
Centerlines:Lobe Separation - 112° Intake Centerline - 107°
 \\;
I hope it is not to radical for a street driven 331 but it should hit pretty hard on idle. Originally I had planned on a 2221 cam but got the 2281 delivered by mistake instead and as fate may have it and I'm now going stroker it should make the 331 come alive.
 \\;
For comparison this is the 2221 spec:
#2221
ENGINE: FORD 289-302 V8
RPM RANGE: 1500-6500
Duration at 0.006" Lift: Intake: 298° Exhaust: 302° \\;
Duration at 0.050" Lift: Intake: 227° Exhaust: 234° \\;
Lift at Cam: Intake: 0.325" Exhaust: 0.325"
Lift at Valve: Intake: 0.520" Exhaust: 0.520"
Intake: 6° BTDC 41° ABDC
Exhaust: 54° BBDC 0° ATDC
Centerlines: Lobe Separation - 112° Intake Centerline - 107°
Edelbrock #2281
ENGINE: FORD 351W
RPM RANGE: 1500-6500
Duration at 0.006" Lift:Intake: 299° Exhaust: 302°
Duration at 0.050" Lift:Intake: 235° Exhaust: 238°
Lift at Cam:Intake: 0.358" Exhaust: 0.364"
Lift at Valve:Intake: 0.573" Exhaust: 0.582"
Intake:11° BTDC 44° ABDC
Exhaust:56° BBDC 2° ATDC
Centerlines:Lobe Separation - 112° Intake Centerline - 107°
 \\;
I hope it is not to radical for a street driven 331 but it should hit pretty hard on idle. Originally I had planned on a 2221 cam but got the 2281 delivered by mistake instead and as fate may have it and I'm now going stroker it should make the 331 come alive.
 \\;
For comparison this is the 2221 spec:
#2221
ENGINE: FORD 289-302 V8
RPM RANGE: 1500-6500
Duration at 0.006" Lift: Intake: 298° Exhaust: 302° \\;
Duration at 0.050" Lift: Intake: 227° Exhaust: 234° \\;
Lift at Cam: Intake: 0.325" Exhaust: 0.325"
Lift at Valve: Intake: 0.520" Exhaust: 0.520"
Intake: 6° BTDC 41° ABDC
Exhaust: 54° BBDC 0° ATDC
Centerlines: Lobe Separation - 112° Intake Centerline - 107°
06-04-2008, 06:10 PM
#4
5th Gear Member
Join Date: Dec 2006
Location: louisiana
Posts: 2,763
RE: Is this cam to radical for a 331 Stroker street driver?
honestly, there might be 3 people on this forum that could really read cam specs, honestly its alot more to it than you think.
i can tell you one thing though, those heads are going to really kill the potential of the stroker AND you are going to get valve float before 6k.
how do i know this? i have the RPM heads on my 331 and they are not enough, plus the valve springs do not have enough spring pressure to control my xe270hr cam, which is not a big cam, but an agressive lobe design, it opens the valve quick and closes it quick, makes more power but takes a good spring to control it.
i can tell you one thing though, those heads are going to really kill the potential of the stroker AND you are going to get valve float before 6k.
how do i know this? i have the RPM heads on my 331 and they are not enough, plus the valve springs do not have enough spring pressure to control my xe270hr cam, which is not a big cam, but an agressive lobe design, it opens the valve quick and closes it quick, makes more power but takes a good spring to control it.
06-04-2008, 06:16 PM
#5
Thread Starter
Join Date: Oct 2006
Location:
Posts: 46
RE: Is this cam to radical for a 331 Stroker street driver?
ORIGINAL: 94StinkinLincoln
honestly, there might be 3 people on this forum that could really read cam specs, honestly its alot more to it than you think.
i can tell you one thing though, those heads are going to really kill the potential of the stroker AND you are going to get valve float before 6k.
how do i know this? i have the RPM heads on my 331 and they are not enough, plus the valve springs do not have enough spring pressure to control my xe270hr cam, which is not a big cam, but an agressive lobe design, it opens the valve quick and closes it quick, makes more power but takes a good spring to control it.
honestly, there might be 3 people on this forum that could really read cam specs, honestly its alot more to it than you think.
i can tell you one thing though, those heads are going to really kill the potential of the stroker AND you are going to get valve float before 6k.
how do i know this? i have the RPM heads on my 331 and they are not enough, plus the valve springs do not have enough spring pressure to control my xe270hr cam, which is not a big cam, but an agressive lobe design, it opens the valve quick and closes it quick, makes more power but takes a good spring to control it.
Are you one of those 3? \\;
 \\;
Yeah I planned on a standard top end build and when I took off the stock heads and looked under I didn't like what I saw. \\; Basically it will need a rebuild so I figure while I am doing it I mine as well stroke it for a few hundred more. \\; So would you advise going ahead and swapping back to the 2221 cam that I had originally planned on? \\; I was worried about the srpings since they are .575" max and lift equals or exceeds that. \\; Wonder if upgrading the prings would be enough or if I should stay with the smaller cam. \\; If I do that how much HP might I lose.
06-04-2008, 07:33 PM
#6
3rd Gear Member
Join Date: Sep 2007
Location:
Posts: 798
RE: Is this cam to radical for a 331 Stroker street driver?
Do not go off max lift ratings for springs. That is one of many factors.
You will have to replace your valve springs, without a doubt.
I predict valve float or other issues, even before 6k.
You will have to replace your valve springs, without a doubt.
I predict valve float or other issues, even before 6k.
06-04-2008, 07:39 PM
#7
D.R. THE PATHETIC DORK
Join Date: Jun 2007
Location: West Virginia
Posts: 30,863
RE: Is this cam to radical for a 331 Stroker street driver?
Personall your heads are a little on the small side for a stroker and that cam is just a tad more aggressive than my xe282 and mine is fine on the street
06-04-2008, 07:40 PM
#8
2nd Gear Member
Join Date: Apr 2008
Location:
Posts: 393
RE: Is this cam to radical for a 331 Stroker street driver?
you should always match your springs to your cam with a few pounds of what the required specs are anyways, but with that kinda duration your vacuum at an idle is going to be on the weak side and may effect power brakes.
06-04-2008, 08:12 PM
#9
5th Gear Member
Join Date: Dec 2006
Location: louisiana
Posts: 2,763
RE: Is this cam to radical for a 331 Stroker street driver?
i got 16in with my xe270hr
i thought i knew how to read cam specs, untill i talked to Jay Allen, then after that i keep my mouth shut b/c i dont know as much as i thought i did lol
and max cam lift for springs dont mean squat, installed heights is what makes the difference, if you squished the springs some more, you get more pressure, but then get closer to coil bind and valvetrain harmonics.
130-160lbs seat and
340-380lbs closed
those springs are about 110 seat, if they are even that good.
it will cost some money to get it done right, since there is a god awful amount of knowledge to assemble a set of heads with the correct parts, go to a local engine shop and tell them what you have and what you are looking for, and get a cam recomendation. im going to a custom cam, so i will not be needing my XE270HR cam, if you are interested, just pm or email me.
it starts pulling real hard at about 2500 and pulls to 6k, but i dont know if it has any more in it, since i do start floating, but i have been told 6k is about peak.
i thought i knew how to read cam specs, untill i talked to Jay Allen, then after that i keep my mouth shut b/c i dont know as much as i thought i did lol
and max cam lift for springs dont mean squat, installed heights is what makes the difference, if you squished the springs some more, you get more pressure, but then get closer to coil bind and valvetrain harmonics.
130-160lbs seat and
340-380lbs closed
those springs are about 110 seat, if they are even that good.
it will cost some money to get it done right, since there is a god awful amount of knowledge to assemble a set of heads with the correct parts, go to a local engine shop and tell them what you have and what you are looking for, and get a cam recomendation. im going to a custom cam, so i will not be needing my XE270HR cam, if you are interested, just pm or email me.
it starts pulling real hard at about 2500 and pulls to 6k, but i dont know if it has any more in it, since i do start floating, but i have been told 6k is about peak.
06-04-2008, 08:16 PM
#10
D.R. THE PATHETIC DORK
Join Date: Jun 2007
Location: West Virginia
Posts: 30,863
RE: Is this cam to radical for a 331 Stroker street driver?
I ALways work off of seat pressure cause to obtain for example 110 on the seat it may take a little more than what came card says it should spec at