Opinions please
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Posting Guru
Joined: Jul 2003
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From: Eureka, Ca.
Opinions please
Here are the specs for my next upgrade to the 396FE:
Bore 4.08
stroke 3.784
CR 10.68
EdelHeads KC stage II
Victor intake
1000cfm carb
Crane 521 cam
DD2K is giving me approx. 600HP and 550tq.
Can someone confirm my numbers. I am nopt real confident with DD2K. yet. I couldn't find LCA for the 521 so I used 108 for both fields.
Bore 4.08
stroke 3.784
CR 10.68
EdelHeads KC stage II
Victor intake
1000cfm carb
Crane 521 cam
DD2K is giving me approx. 600HP and 550tq.
Can someone confirm my numbers. I am nopt real confident with DD2K. yet. I couldn't find LCA for the 521 so I used 108 for both fields.
Lead Driver
Joined: Apr 2001
Posts: 6,175
Likes: 21
From: Texas
This is for your track toy, right?
I can already yell you that you're gonna get a lot of responses to step up to the bigger Crane 541 cam. Or, an even bigger custom grind.
I like the 521 for my truck that will still be used as a truck. But for a track toy with the weight savings you have planned, the victor intake, a 1000 CFM carb, and the Stage II heads, you need more cam!
I can already yell you that you're gonna get a lot of responses to step up to the bigger Crane 541 cam. Or, an even bigger custom grind.
I like the 521 for my truck that will still be used as a truck. But for a track toy with the weight savings you have planned, the victor intake, a 1000 CFM carb, and the Stage II heads, you need more cam!
FE "Freakin Expensive"
Joined: Dec 2003
Posts: 6,461
Likes: 4
From: Smith Mountain Lake, VA
Randy, I must have done something wrong? LOL!!
I came up with @ +4 dgrees install, 667HP @ 7500rpm
and 553lbs of torque @ 5500rpm
And I did the cam specs @ .004" Like Sean had said....Big tube headers (open)
I came up with @ +4 dgrees install, 667HP @ 7500rpm
and 553lbs of torque @ 5500rpm
And I did the cam specs @ .004" Like Sean had said....Big tube headers (open)
Posting Guru
Joined: Aug 2001
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From: Evanston, WY
I agree that with headers with 2"+ primaries, running open, that you should approach 600HP, maybe just a tiny bit less. I think that there would be more to be had if you increased your compression substantially and ran a little bigger (not much) solid roller. Comp has a cam #33-781-8 that has 292/292adv,248/248@.050, .645 on a 110cl that should make that combination of yours absolutely fly with about 11.5-12.0 compression and premium fuel. It would give great mid range, and top out at around 6500. It is the cam I am going to put in mine to bring back a little more mid range.
-Scouder
-Scouder
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Posting Guru
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From: Eureka, Ca.
Brian,
I am not ready to change out the pistons just yet. I can get to 10.68 by changing to a different headgasket. Maybe 11.00 if I mill the head some.
The adv. dur of the 541 is 301/305 at .632/.655 lift. I don't know the CL can some one tell me?
That is bigger than your description above. Did I miss something?
Russ I ran it with large tube headers and muffs. 7500rpm is too high. I want to shift at 6500 redline at 7000rpm The person reding the graph for me gave a lower peak rpm. I will have to run it again.
Greg,
The 2.19 int and 1.75ext. valves won't fit in a 3.08 bore. At least I don't think they will. Yes the truck is on a serious diet and weight transfer program. The cab and engine are moved back 6". As for stall I was thinking of 3200-3500rpm. With 4.11 or 4.56 gears and 31"x16" tires on 16" rims.
I am not ready to change out the pistons just yet. I can get to 10.68 by changing to a different headgasket. Maybe 11.00 if I mill the head some.
The adv. dur of the 541 is 301/305 at .632/.655 lift. I don't know the CL can some one tell me?
That is bigger than your description above. Did I miss something?
Russ I ran it with large tube headers and muffs. 7500rpm is too high. I want to shift at 6500 redline at 7000rpm The person reding the graph for me gave a lower peak rpm. I will have to run it again.
Greg,
The 2.19 int and 1.75ext. valves won't fit in a 3.08 bore. At least I don't think they will. Yes the truck is on a serious diet and weight transfer program. The cab and engine are moved back 6". As for stall I was thinking of 3200-3500rpm. With 4.11 or 4.56 gears and 31"x16" tires on 16" rims.
Last edited by Randyb12; Aug 15, 2004 at 10:27 PM.
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Posting Guru
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From: Evanston, WY
Keep in mind that the hydraulic rollers have a MUCH slower ramp than the solid rollers. This means that for any given advertised duration there is less "area under the curve". Without doing alot of comparison, it is likely that a roller with an advertised duration in the 280's may outflow a hydraulic with an adv duration of 300. Don't bother to correct me if I missed it a little, I'm just making a point. This means that you can have the performance of a large hydraulic without some of the bad side effects like loss of compression, vacuum, reversion, etc...
-Scouder
-Scouder
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FE "Freakin Expensive"
Joined: Dec 2003
Posts: 6,461
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From: Smith Mountain Lake, VA
Randy, I'am going to run those # again also...I knew that the HP was to high..I dont know what I did wrong...And remember I think it for every .006" you mill the head you het approx... .1 on the CR....So I have been told, A rule of thumb thing?
And what you take off the heads you should take off the intake so the ports match..
And I also agree, I think a 31" tire is about right for out trucks....I'am going to run the Nitto 404s on the back of mine, but in a 305/60/R17 that will give me 12."5 of rubber per side! With ION 138 style wheels all the way around...
And then for Occational Drag strip runs...there's a wheel house that make's a custom 8 lug 15" rim for mounting slicks on.... Cant wait Randy to see more Pics of your project...
Russ
And what you take off the heads you should take off the intake so the ports match..
And I also agree, I think a 31" tire is about right for out trucks....I'am going to run the Nitto 404s on the back of mine, but in a 305/60/R17 that will give me 12."5 of rubber per side! With ION 138 style wheels all the way around...
And then for Occational Drag strip runs...there's a wheel house that make's a custom 8 lug 15" rim for mounting slicks on.... Cant wait Randy to see more Pics of your project...
Russ
Senior User
Joined: Feb 2004
Posts: 185
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From: Crownsville, MD
From Keith Craft's website: "We have found the standard 390/ 428 blocks will try to split when run in excess of 600HP"
He sells a main girdle for addressing this, but it sounds like you want to leave the bottom end as is. Not sure if this matters to you or not, but it seems like something you may want to consider as you approach 600 hp (on DD).
Bob
He sells a main girdle for addressing this, but it sounds like you want to leave the bottom end as is. Not sure if this matters to you or not, but it seems like something you may want to consider as you approach 600 hp (on DD).
Bob
FE "Freakin Expensive"
Joined: Dec 2003
Posts: 6,461
Likes: 4
From: Smith Mountain Lake, VA
OK Randy,
This is more like it!!
Cam installed +4 Degree's Cam specs @ .050 and 11 to 1 CR.
174HP @ 2000RPM
458LBS of toque @ 2000RPM
592HP @ 6000RPM
Also 592HP @ 6500RPM, but you'll lose 40LBS of torque if you shift there!
568LBS of torque @ 4500RPM
Hope this helps.. also done with large tube headers without Muff's
Russ
This is more like it!!
Cam installed +4 Degree's Cam specs @ .050 and 11 to 1 CR.
174HP @ 2000RPM
458LBS of toque @ 2000RPM
592HP @ 6000RPM
Also 592HP @ 6500RPM, but you'll lose 40LBS of torque if you shift there!
568LBS of torque @ 4500RPM
Hope this helps.. also done with large tube headers without Muff's
Russ
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