| [ Total Views: 1534 | Total Replies: 14 | Thread Id: 62811 ] |
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 noslug
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| posted on May 29th, 2007 at 02:10 PM |
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What do you think of these ??
46 x 37 modified wedgeports. These were done by Darren Krewenchuk up in Canada, flowed through the manifolds at 28". LS1 springs and valves.
12s on radials ?
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 vw54
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| posted on May 29th, 2007 at 06:02 PM |
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there big capacity combustion chambers if your running stock deck height 64cc ???
Are they set up for a turbo system it would be a low compression ratio
Whats the casting of the origional head 041 044 ???
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55slug
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| posted on May 29th, 2007 at 06:06 PM |
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They have been cut down to 60cc. 044 head. Compression will be 9.5:1 with a .050" deck height (2332). Engine will be running nitrous oxide which is
why the compression is there (FK87 cam).
I dont know if you can see the flow figures, but they flowed 200 cfm at .450" and 227 cfm at .600"
[ Edited on 29-5-2007 by 55slug ]
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westi
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| posted on May 29th, 2007 at 09:46 PM |
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give us look at your ports
down sharon.
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dangerous
A.k.a.: Dave Butler Muffin Man
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| posted on May 30th, 2007 at 05:48 AM |
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Darren is a gun, I think you will be very happy.
Were were the flow sheets?
Those numbers are excellent, and knowing Darren,
he is a "high velocity" dude so you can expect the best performance per CFM.
| Quote: | Originally
posted by westi
That's mad Alan.
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noslug
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| posted on May 30th, 2007 at 07:06 AM |
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dangerous
A.k.a.: Dave Butler Muffin Man
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| posted on May 30th, 2007 at 07:27 AM |
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Thanks!
| Quote: | Originally
posted by westi
That's mad Alan.
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westi
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| posted on May 30th, 2007 at 04:20 PM |
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look's great ,thank's for sharing pic's.
meow with the comp
down sharon.
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vw54
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| posted on May 30th, 2007 at 05:42 PM |
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Thats a BIG cam with 0.600" lift
sounds good have fun with the gas
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55slug
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| posted on May 30th, 2007 at 06:09 PM |
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| Quote: | Originally
posted by vw54
Thats a BIG cam with 0.600" lift
sounds good have fun with the gas
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Yeah, Im using berg 1.4's as well, from what Ive heard they are notorious for lifting more than the advertised. Not sure wether I will have
piston/valve clearance issues with this, guess ill be finding out soon !
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westi
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| posted on June 1st, 2007 at 02:57 PM |
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what size nos shot are you planing on,big i hope
down sharon.
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dangerous
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| posted on June 1st, 2007 at 05:38 PM |
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With the port cross section and that cam it will come on way late without gas.
especially with the Berg rocker ratio.
You may like to consider a bit less duration on the intake(DON"T suggest K8!, I am thinking much smaller) and a slightly wider lobe centre.
Even with that big cam it will get in the 12's easy(unless your car weighs a TON).
As long as you can keep it in the power.
| Quote: | Originally
posted by westi
That's mad Alan.
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55slug
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| posted on June 2nd, 2007 at 07:04 AM |
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Little shot to start with 60 Hp, over time stepping up to 100Hp if I can get it to the ground, looking at controllers to help here.
Dave, I am concerned about bolting this to the box I am running. Berg 5 with a 4.37 r and p. Gears are short 3.xx 2.35, 1.58, 1.21, .82. Im running
close to 7k at 100 mph in 4th through the traps now, which is why I wanted to build something that would spin to 8k. But - I dont need those revs in a
nitrous application. I guess I have to sacrifice one or the other eh ??
K8 ??  I love the cam I have - the K87 is a billet berg number. I am open
to suggestions - 112 LC ? W120 on intake K10 on the exhaust ?? Any suggestions wecome.
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dangerous
A.k.a.: Dave Butler Muffin Man
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| posted on June 2nd, 2007 at 08:49 AM |
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The FK87 is an excellent cam and with the added port area and rocker ratio that you have,
it is as big as you will ever want for a normally aspirated street/race combo.
You have to ask your self if you want a good N/A cam and compimised N20 performance,
or acceptable(but not optimum) N/A combo and ideal N2O deal.
I am thinking of a lobe with mid 250s @.050 on the inlet and mid 260's for the exhaust on 112 lobe centres.
I know that the V26 Engle profile is smooth and sweet(254@.050"),
but I'm not sure of a lobe that will be happy for the exhaust with larger than 1.4 rocker
ratios,
like Berg 1.4s.(some K8s I have seen to be quite harsh on larger than actual 1.4 ratios).
The V26 (NOT VZ25!!) is available through Bergs, but is not listed in Engle's catalogue.
Perhaps a V26 on 112 lobe centres and a 1.45 exhaust rocker?
This can be swapped around to the inlet for better N/A performance.
Surely there are some cam grinders in NZ that can help,
if not try Sure-Cam in Sydney(an ex-kiwi, and gun cam dude..but not cheap)
If it were me(and it is not) I would use V26 as it comes with 108 LC and 1.4 inlet rocker and 1.45 exhaust.
I would swap them around for street(n/a) use.
If you want a bit more HP then 1.45 and 1.54.
With your heads this will not behave like a 'small' cam.
The large port and area of the lift curve(at the valve) will extend the rev range
from what you have now n/a.
This is all my opinion, but should give some interest to get your train of though flowing.
| Quote: | Originally
posted by westi
That's mad Alan.
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noslug
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| posted on June 7th, 2007 at 09:22 AM |
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Thanks Dave, Ill do some more thinking about the cam side of things. There are a couple of cam grinders here that maybe able to help out, Ill contact
them and see what they come up with.
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