Shit, just bolt the VNs on std...they flow more than anything you as an amatuer porter can do in a life time.
R
porting pre VN V8 heads
Started by
makka
, Oct 10 2008 07:39 PM
60 replies to this topic
#27
_greenmachine215_
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Posted 14 October 2008 - 11:21 PM
HAHA Well said rory,
I think we've said enough and now its really upto makka what he decides to do..
cheers
I think we've said enough and now its really upto makka what he decides to do..
cheers
#28
_@milco@_
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Posted 14 October 2008 - 11:40 PM
hey makka ,
i have a complete write up and pic tures on porting out hq style heads i will get a round to scanning it and posting it up for ya if you like...
i have a complete write up and pic tures on porting out hq style heads i will get a round to scanning it and posting it up for ya if you like...
#29
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Posted 15 October 2008 - 07:24 AM
Hey makka,
Was at justins work last night, he showed me a RPM? or Redline? High Rise manifold to suit a VN headed carby motor. It looked shit hot! I think he said it was only about $400... Very tempting... But then we still need extractors.
I'll put up some pics tonight of my new ported heads as well... HEHE! Justin gave me a few tips and pointed out a few things... Bit hard to explain without having the heads to demonstrate what im on about.
O yeah, also... Game on bitch!
Was at justins work last night, he showed me a RPM? or Redline? High Rise manifold to suit a VN headed carby motor. It looked shit hot! I think he said it was only about $400... Very tempting... But then we still need extractors.
I'll put up some pics tonight of my new ported heads as well... HEHE! Justin gave me a few tips and pointed out a few things... Bit hard to explain without having the heads to demonstrate what im on about.
O yeah, also... Game on bitch!
#30
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Posted 15 October 2008 - 07:53 AM
Also, chatting last night with a few people...
I heard there are a few other things to note in regards to L34 Vs VN heads.
VN heads will make its power up high, but not be as torquey down low?
L34 heads will be nice and grunty down low, but struggles making power up high?
I think thats how i interpreted things
I heard there are a few other things to note in regards to L34 Vs VN heads.
VN heads will make its power up high, but not be as torquey down low?
L34 heads will be nice and grunty down low, but struggles making power up high?
I think thats how i interpreted things
Edited by MRLXSS, 15 October 2008 - 07:53 AM.
#31
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Posted 15 October 2008 - 08:01 AM
redline manifolds are $600 ish.i sold a used one on ebay for $525 
older style heads have no performance advantages over vn ones.the torque thing is not true,i'm yet to see a stock vl v8 out torque a vn v8.there is a world of difference (and yes i know its not 'only' because of the heads.
older style heads have no performance advantages over vn ones.the torque thing is not true,i'm yet to see a stock vl v8 out torque a vn v8.there is a world of difference (and yes i know its not 'only' because of the heads.
#32
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Posted 15 October 2008 - 08:19 AM
^^ Fair enough, just came up in convo last night, No idea if its true or not. Obviously not ^^
Maybe $400 is the trade price for the Manifolds...
Maybe $400 is the trade price for the Manifolds...
#33
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Posted 15 October 2008 - 08:26 AM
trade was around $500 last year from memory
#34
_TJ253_
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Posted 15 October 2008 - 09:14 AM
I think we payed $600-$700 apparently there is only 3 types 2 choose from?
there is a dearer 1 then ours think it was around $900 mark
anyway here is a pic of the Redline we got
there is a dearer 1 then ours think it was around $900 mark
anyway here is a pic of the Redline we got
#35
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Posted 15 October 2008 - 09:37 AM
These were the Hi-Rise ones, where there is like an air-gap. I'll ask him What brand and actual price it is next time i see him
#37
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Posted 15 October 2008 - 10:41 AM
if i hadnt of just bought a donk id be onto them
#38
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Posted 15 October 2008 - 11:16 AM
I used that exact same Redline manifold on a bog standard low kM VP SS engine in my Overlander 1-tonner last year. The engine had significantly less low rpm torque than the worn out old red 308 that it replaced. Once it got up and going it was great, just not that good for low rpm work especially in a 4x4. It used the same 600 Holley, HEI dizzy and LPG mixer as the old engine. It really needed the injection bolted back on to improve it's low rpm torque, which was always the plan. I have no doubt the peak torque and peak power would have been much greater with the EFI heads though, but for a tow or 4x4 carby application the early heads were better.
#39
_HatchmanSS76_
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Posted 15 October 2008 - 12:14 PM
For the VN style heads there are 6 manifold choices to run a carby.
Torque-power have two to choose from. Dual plane and and Single plane. Thier sigle plane is the best available for power (racing) applications. The single plane has the air gap and will not fit under the bonet without cutting a hole.
Harrop also have two to choose from (duel and single) and are so similar to the Torque-power. Harrop were the first to make them and Torque-power improved on it. The Harrop single plane has the air gap and needs a hole in the bonet.
Inner Actice make one and I think it a dual palne one (I can find out exactly if your interested). Not as the Harrop and Torque-power.
The Redline hiwinder is a sigle plane manifold but is no where near as good as the Harrop and Torque-power. It's not even as good as the dual plane Harrop or Torque-power but will fit under the bonet no hole and is the cheapest of all the VN style manifolds. I have first hand experience with this one and change to a Torque-power single and it was like WOW heaps more grunt. Sadly I inverted the hatch before I got a time slip to post a track time comparison.
Makka if you port the old heads yourself get some good advice on what and where to as a bad port job good can make heads much worse if done wrong.
My VT ones had to be re-done by some one who knew what they were doing as the fist engine builder (ex mate) did a shocking job, 20hp flow gain by having it done right. Luck they weren't damaged like my bother inlaws who bought some VN ones that some one had done at home and made them worse than std. They were binned and $300 out of pocket, he was too honest to sell them to anyone else.
Torque-power have two to choose from. Dual plane and and Single plane. Thier sigle plane is the best available for power (racing) applications. The single plane has the air gap and will not fit under the bonet without cutting a hole.
Harrop also have two to choose from (duel and single) and are so similar to the Torque-power. Harrop were the first to make them and Torque-power improved on it. The Harrop single plane has the air gap and needs a hole in the bonet.
Inner Actice make one and I think it a dual palne one (I can find out exactly if your interested). Not as the Harrop and Torque-power.
The Redline hiwinder is a sigle plane manifold but is no where near as good as the Harrop and Torque-power. It's not even as good as the dual plane Harrop or Torque-power but will fit under the bonet no hole and is the cheapest of all the VN style manifolds. I have first hand experience with this one and change to a Torque-power single and it was like WOW heaps more grunt. Sadly I inverted the hatch before I got a time slip to post a track time comparison.
Makka if you port the old heads yourself get some good advice on what and where to as a bad port job good can make heads much worse if done wrong.
My VT ones had to be re-done by some one who knew what they were doing as the fist engine builder (ex mate) did a shocking job, 20hp flow gain by having it done right. Luck they weren't damaged like my bother inlaws who bought some VN ones that some one had done at home and made them worse than std. They were binned and $300 out of pocket, he was too honest to sell them to anyone else.
#40
_@milco@_
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Posted 15 October 2008 - 12:17 PM
porting guide posted up taken from "modify your holden" book
#41
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Posted 15 October 2008 - 12:39 PM
active manifolds are single plane
tp makes 3 manifolds the one you missed was the big paw one
use a tp single plane under 550hp,use a harrop single plane over that power
the hiwinder is a good manifold till about 450hp and will make more low down power than a harrop
i cant comment on dual plane manifolds as i think they suck and i wouldnt use one haha
tp makes 3 manifolds the one you missed was the big paw one
use a tp single plane under 550hp,use a harrop single plane over that power
the hiwinder is a good manifold till about 450hp and will make more low down power than a harrop
i cant comment on dual plane manifolds as i think they suck and i wouldnt use one
haha
#42
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Posted 16 October 2008 - 07:18 AM
There is the port work on my new heads.
(Bought like this, my mate hasnt touched them yet)
(Bought like this, my mate hasnt touched them yet)
#43
_1QUICK LJ_
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Posted 26 November 2008 - 10:36 PM
those pics indicate a very ported exhaust, if over done this will reduce torque output.
Edited by 1QUICK LJ, 26 November 2008 - 10:37 PM.
#44
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Posted 26 November 2008 - 10:39 PM
As in too much guide boss removed?
#45
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#46
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Posted 27 November 2008 - 07:25 AM
Well i passed up those heads... Got new ideas now...
#47
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Posted 27 November 2008 - 11:57 AM
yeah well, I got VN heads now, just gotta decide on a manifold!
#48
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Posted 28 November 2008 - 04:12 PM
i was talking to peter uc about manifolds for vn head i cant rember the brandname wasnts redline but was similar
i bought my motor and heads for 500
i bought my motor and heads for 500
#49
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Posted 28 November 2008 - 07:24 PM
My recommendation was Torque Power. But the manifold type is what you have to decide on; single plain, high rise dual plane, standard dual plane. All depends on the intended use.
#50
_slydog71_
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Posted 28 November 2008 - 07:42 PM
What about quad weber manifold with vn heads !
Edited by slydog71, 28 November 2008 - 07:43 PM.
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