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Re: 430" small block build
[Re: quick77rt ]
#912682
01/25/11 10:48 PM
01/25/11 10:48 PM
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Joined: Nov 2004
Posts: 226
lino lakes,MN
onebaddakota
enthusiast
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enthusiast
Joined: Nov 2004
Posts: 226
lino lakes,MN
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I am also considering a 4.125 crank for my fully ported SB edddie heads. What I'd like to know is would it be cost effective to replace my 4" crank 10:1 motor with a 4.125 crank and 11.5 motor? The heads aren't ideal, but would they still build more HP on a bigger CI motor? The extra compression and cubes will allow for a bigger cam. My hydraulic roller is all done at 6000RPM anyway. In my mind, a 40-50HP bump would justify the expense. I just don't know if we're at the law of diminishing returns with the eddies and these big cranks.
Tom
10.56 at 125.6, with a 1.43 60 ft.
E85, Hyd. Roller 410 magnum,full exhaust, 3500 race weight.
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Re: 430" small block build
[Re: onebaddakota]
#912683
01/25/11 10:51 PM
01/25/11 10:51 PM
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Joined: Jan 2003
Posts: 32,394
Quicktree
I Win
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I Win
Joined: Jan 2003
Posts: 32,394
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Quote:
I am also considering a 4.125 crank for my fully ported SB edddie heads. What I'd like to know is would it be cost effective to replace my 4" crank 10:1 motor with a 4.125 crank and 11.5 motor? The heads aren't ideal, but would they still build more HP on a bigger CI motor? The extra compression and cubes will allow for a bigger cam. My hydraulic roller is all done at 6000RPM anyway. In my mind, a 40-50HP bump would justify the expense. I just don't know if we're at the law of diminishing returns with the eddies and these big cranks.
Tom
I think you would see some gain but doubt it would be 50hp with those heads.
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Re: 430" small block build
[Re: Quicktree]
#912684
01/25/11 11:25 PM
01/25/11 11:25 PM
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Joined: Jan 2003
Posts: 9,881
Weddington, N.C.
Streetwize
master
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master
Joined: Jan 2003
Posts: 9,881
Weddington, N.C.
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onebad...wouldn't it be easier to upgrade the heads to get the 50hp? I agree w/quick that's it's not likely enough cubes/CR bump to make THAT much (50hp) difference....30 maybe i think. i just had Ryan work his magic on my 414 E-heads, right at a 30cfm increase over stock from ~.350 to 600 lift and 40+ up way beyond my present cam...that's 50-60 hp that bolts on.  "$1 in the heads is worth $3 in the shortblock"....Joe Sherman
Last edited by Streetwize; 01/25/11 11:27 PM.
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Re: 430" small block build
[Re: Streetwize]
#912685
01/25/11 11:40 PM
01/25/11 11:40 PM
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Joined: Nov 2004
Posts: 226
lino lakes,MN
onebaddakota
enthusiast
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enthusiast
Joined: Nov 2004
Posts: 226
lino lakes,MN
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Well I run all magnum stuff so a head change would mandate new exhaust and valvetrain. My current cam is a 236/242 580 lift cam. What about when you factor in a bigger cam, say in the high 240s/250s. That should allow for the same street manners given the cubes and compression.
If I do to this, you may be getting a consult for a cam, Wize.
10.56 at 125.6, with a 1.43 60 ft.
E85, Hyd. Roller 410 magnum,full exhaust, 3500 race weight.
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Re: 430" small block build
[Re: quick77rt ]
#912686
01/26/11 09:55 AM
01/26/11 09:55 AM
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Joined: Aug 2003
Posts: 11,179
Atco NJ
DJVCuda
OP
I Live Here
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OP
I Live Here
Joined: Aug 2003
Posts: 11,179
Atco NJ
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Quote:
But to stay on track, any cam info on this motor Dave????
Seems like alot of nice parts for a big power build, can you share your thoughts on what you want the end result to be?
I still have no cam, or any valvetrain for that matter.
The block was tubed by the prior owner, and that limits me to the solid cam variety, but we'll see how everything checks out on the bock before i pull the pin on something. Right now, I am leaning towards a roller since I have nothing for it and would be starting from scratch.
As far as the end result, I'd like a street / strip motor for my 68 cuda - It does not need to put the mileage on like my 66 annually (sometimes over 6,000) but i've had this block for a long time now and need to get something into it or get it out of my garage...lol
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Re: 430" small block build
[Re: DJVCuda]
#912687
01/26/11 10:58 AM
01/26/11 10:58 AM
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Joined: Oct 2007
Posts: 3,978
Hilltown Pa
1967dartgt
master
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master
Joined: Oct 2007
Posts: 3,978
Hilltown Pa
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I hope you sonic checked the x block I have one at Ryans and it didn't check out to well and ended up going with a smaller bore.But I am useing a 4.25 stroke callies.
Brett Miller W9 cnc'd heads
STR Chassis fabraction
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Re: 430" small block build
[Re: Quicktree]
#912688
01/26/11 11:25 AM
01/26/11 11:25 AM
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Joined: Dec 2004
Posts: 1,489
St. Louis Mo.
10 o to go
"Happy Don"
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"Happy Don"
Joined: Dec 2004
Posts: 1,489
St. Louis Mo.
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Quote:
Quote:
I am also considering a 4.125 crank for my fully ported SB edddie heads. What I'd like to know is would it be cost effective to replace my 4" crank 10:1 motor with a 4.125 crank and 11.5 motor? The heads aren't ideal, but would they still build more HP on a bigger CI motor? The extra compression and cubes will allow for a bigger cam. My hydraulic roller is all done at 6000RPM anyway. In my mind, a 40-50HP bump would justify the expense. I just don't know if we're at the law of diminishing returns with the eddies and these big cranks.
Tom
I think you would see some gain but doubt it would be 50hp with those heads.
Quicktree
Are you the one that has 360-1 heads ?
I like to upgrade my ported Eddy heads on my 418.
If their was a gain to them or switch to a 4.125 4.250 crank set up .
Anybody just made either change head or crank to hear true et changes not dyno numbers .
My 418 ,callies crank,compstar rods ,probe pistons,eddy headed solid cam ,seems to run good compare to what I see in a w5 headed combos or even 360-1 .
Where is gain more cubes ,more stroke ,more heads .?
Its hard to compare without hearing just the combos .
Thanks Don
Last edited by 10 o to go; 01/26/11 11:26 AM.
2009 418" build dan smith built
new 9.96 131.82
6.23 108
1.30 60 foot
best to date 9/15/09
8in 727 430 dana 2860 lb 3040 lb w driver
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Re: 430" small block build
[Re: 10 o to go]
#912689
01/26/11 01:13 PM
01/26/11 01:13 PM
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Joined: Jan 2003
Posts: 32,394
Quicktree
I Win
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I Win
Joined: Jan 2003
Posts: 32,394
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Quote:
Quote:
Quote:
I am also considering a 4.125 crank for my fully ported SB edddie heads. What I'd like to know is would it be cost effective to replace my 4" crank 10:1 motor with a 4.125 crank and 11.5 motor? The heads aren't ideal, but would they still build more HP on a bigger CI motor? The extra compression and cubes will allow for a bigger cam. My hydraulic roller is all done at 6000RPM anyway. In my mind, a 40-50HP bump would justify the expense. I just don't know if we're at the law of diminishing returns with the eddies and these big cranks.
Tom
I think you would see some gain but doubt it would be 50hp with those heads.
Quicktree
Are you the one that has 360-1 heads ?
I like to upgrade my ported Eddy heads on my 418.
If their was a gain to them or switch to a 4.125 4.250 crank set up .
Anybody just made either change head or crank to hear true et changes not dyno numbers .
My 418 ,callies crank,compstar rods ,probe pistons,eddy headed solid cam ,seems to run good compare to what I see in a w5 headed combos or even 360-1 .
Where is gain more cubes ,more stroke ,more heads .?
Its hard to compare without hearing just the combos .
Thanks Don
yes I have fully ported 360-1s and building a 426" X block with a K1 4.125 crank.
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Re: 430" small block build
[Re: 10 o to go]
#912690
01/26/11 01:33 PM
01/26/11 01:33 PM
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Joined: Oct 2007
Posts: 3,978
Hilltown Pa
1967dartgt
master
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master
Joined: Oct 2007
Posts: 3,978
Hilltown Pa
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I switched from fully ported eddys to w-2s on a 421cu in,went from 10.70s to 10.50s.This was a batten w-2 made rectangular port real nice head,bought used already ported, was told they flow 305cfm at .600 never had them checked.Not impressed with that set up.So I then switched to 360-1 245cnc heads and went to a 9.97.This was a little less compression because the indys had a larger camber then the battens.This all was on the same shortblock with the same cam.
Brett Miller W9 cnc'd heads
STR Chassis fabraction
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Re: 430" small block build
[Re: 1967dartgt]
#912691
01/26/11 01:37 PM
01/26/11 01:37 PM
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Joined: Jan 2003
Posts: 32,394
Quicktree
I Win
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I Win
Joined: Jan 2003
Posts: 32,394
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Quote:
I switched from fully ported eddys to w-2s on a 421cu in,went from 10.70s to 10.50s.This was a batten w-2 made rectangular port real nice head,bought used already ported, was told they flow 305cfm at .600 never had them checked.Not impressed with that set up.So I then switched to 360-1 245cnc heads and went to a 9.97.This was a little less compression because the indys had a larger camber then the battens.This all was on the same shortblock with the same cam.
your car mustbe heavy. what does it weigh?
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Re: 430" small block build
[Re: Quicktree]
#912692
01/26/11 01:46 PM
01/26/11 01:46 PM
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Joined: Oct 2007
Posts: 3,978
Hilltown Pa
1967dartgt
master
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master
Joined: Oct 2007
Posts: 3,978
Hilltown Pa
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This is a street car full interior radio etc. Race weight is about 3300lbs.
Brett Miller W9 cnc'd heads
STR Chassis fabraction
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Re: 430" small block build
[Re: Streetwize]
#912698
01/26/11 05:52 PM
01/26/11 05:52 PM
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Joined: Oct 2004
Posts: 8,165
Left Coast
BobR
master
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master
Joined: Oct 2004
Posts: 8,165
Left Coast
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Quote:
BobR,
tell me more about your junk 
-Dart iron block filled.
-4.09" stroke Sonny Bryant crank
-Ross pistons 9.25-1
-Cam-proprietary numbers of our own but much bigger than normal turbo deal
-Don Losito billet heads(flow over 400 cfm) and F.I. sheet metal intake
-Precision fuel injectors
-Jesel Keyway roller lifters and rockers(block has angle corrections)
-Titanium valves
-Aluminum rods
-Jesel belt drive
-Twin Precision 88 turbos-45 pounds total boost.
Those are the basics. Combo went 226 at 2950 pounds-9800 RPM.
Motor is for sale minus turbos if you know anyone interested in playing on the dark side.-8 passes since complete rebuild.
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Re: 430" small block build
[Re: DJVCuda]
#912700
01/26/11 06:32 PM
01/26/11 06:32 PM
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Joined: Mar 2005
Posts: 2,489
Pacifica, CA
Devilbrad
top fuel
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top fuel
Joined: Mar 2005
Posts: 2,489
Pacifica, CA
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Quote:
care to comment on the side loading - side discussion here then?
dealing with the long stroke at almost 10 grand has to show you alot if there was an issue.
Especially with that amount of boost.
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Re: 430" small block build
[Re: DJVCuda]
#912701
01/26/11 08:30 PM
01/26/11 08:30 PM
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Joined: Oct 2004
Posts: 8,165
Left Coast
BobR
master
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master
Joined: Oct 2004
Posts: 8,165
Left Coast
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Quote:
care to comment on the side loading - side discussion here then?
dealing with the long stroke at almost 10 grand has to show you alot if there was an issue.
No issue at all. Of course we rebuild our motor about every 30-40 passes.
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