but he has two other cars he could put it in myss,
his SS hatch and maddys UC hatch.
or even her UC daily.
VN V8 Heads vs Early V8 Heads
Started by
MRLXSS
, Oct 16 2008 07:48 AM
40 replies to this topic
#26
orangeLJ
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Posted 17 October 2008 - 03:08 PM
#27
micklx
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Posted 19 October 2008 - 09:22 PM
When I put the VN heads on my Commodore I noticed a slight power increase over the whole rev range but the main difference was in the top end.
Down the straight at Phillip Island it used to pull 6200 in top gear, now it revs to 7.
Thats almost 30 km/h difference, great for the racetrack but no such a big deal on the street.
As a few have said already, if you are going to get your heads ported and buy a performance manifold anyway, go VN heads, for the $$$ it will cost, it will give you a decent power boost.
Down the straight at Phillip Island it used to pull 6200 in top gear, now it revs to 7.
Thats almost 30 km/h difference, great for the racetrack but no such a big deal on the street.
As a few have said already, if you are going to get your heads ported and buy a performance manifold anyway, go VN heads, for the $$$ it will cost, it will give you a decent power boost.
#28
MRLXSS
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Posted 20 October 2008 - 07:50 AM
Got to make my decision on this motor today... Thanks you guys for making me ummm and arrrr hahaha...
Still not sure what im going to do.
Still not sure what im going to do.
#29
Joshua
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Posted 20 October 2008 - 08:52 AM
buy it! you know it's a bargain.. worst comes to worse you should be able to sell it off and make your money back right?
#30
orangeLJ
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Posted 20 October 2008 - 08:59 AM
im with joshua, buy it.
After all its only $1500 that you could easily make back if need be.
Nows the time to be doing these little kind of things, before a house.
After all its only $1500 that you could easily make back if need be.
Nows the time to be doing these little kind of things, before a house.
#31
_rorym_
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Posted 20 October 2008 - 06:51 PM
If you dont...I will for a spare...its too cheap....Harrop crank..forged SRP pistons....bonus...
R
R
Edited by rorym, 20 October 2008 - 06:52 PM.
#32
TerrA LX
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Posted 20 October 2008 - 07:41 PM
Maybe you should decide what RPM and intended use you have in mind then set a budget and the right combination of parts should come together.
Im sure if you used your present gear bolted together correctly with the stroker crank (if ur keeping it) and a 5L block you will be happy for a while.
Im sure if you used your present gear bolted together correctly with the stroker crank (if ur keeping it) and a 5L block you will be happy for a while.
#33
_1QUICK LJ_
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Posted 14 April 2009 - 12:32 AM
what was the descision in the end?
#34
MRLXSS
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Posted 14 April 2009 - 07:56 AM
VN Heads are better hands down, if you can afford it.
Old Style heads can be very good on a streeter, and help push out some good numbers.... But if you are spending some coin on your motor and want good results... Spend that little bit more and get VN Heads.
Old Style heads can be very good on a streeter, and help push out some good numbers.... But if you are spending some coin on your motor and want good results... Spend that little bit more and get VN Heads.
#35
Statler
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Posted 14 April 2009 - 12:03 PM
I guess it depends on how cheap you can source the heads.
#36
_Allports_
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Posted 15 April 2009 - 12:56 AM
Both heads have their place of merit and of course personal prefference. On record I would agree with the consensus Vn are better yes. Cost more yes accessories cost more to convert yes but at the end of the day wont be as prone to cracking or corrosion as an early head.
As far as flow figures go HQ 2184 head with 1.94 valves go 480-497 flow potential. 2.02 valves go 490-515 flow potential.
Vn pocket ported with 1.94 stock valves will go 500-515 , Stainless valves will go 520-530. 2.02 pocket ported go 560 no drama
2.02 full port job go 610-630. 2.05 go 620-640. 2.08 go 640-660 flow potential.
Manifolds I prefer the Harrop to anything else in a carb application, unless you want to stay under the bonnet in that case a ported hywinder is a good thing.
As far as flow figures go HQ 2184 head with 1.94 valves go 480-497 flow potential. 2.02 valves go 490-515 flow potential.
Vn pocket ported with 1.94 stock valves will go 500-515 , Stainless valves will go 520-530. 2.02 pocket ported go 560 no drama
2.02 full port job go 610-630. 2.05 go 620-640. 2.08 go 640-660 flow potential.
Manifolds I prefer the Harrop to anything else in a carb application, unless you want to stay under the bonnet in that case a ported hywinder is a good thing.
#37
_1QUICK LJ_
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Posted 15 April 2009 - 01:18 AM
allports certainly knows his stuff ive seen his work, i use him for my head work, and yes those flow figures he is quoting are NOT bogus figures, that is what he gets, and with the spark plug in too, unlike some other porters, lol
Edited by 1QUICK LJ, 15 April 2009 - 01:19 AM.
#38
_@milco@_
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Posted 12 January 2010 - 09:39 PM
Manifolds I prefer the Harrop to anything else in a carb application, unless you want to stay under the bonnet in that case a ported hywinder is a good thing.
do you have any experience with the torque-power hi-rise dual plane i am in the market for a vn head manifold for my 330 stroker, and need some good advice from some who know's what there talking about and it seems your just the man! i will be running the engine in a lx with an A9X bonnet scoupe so high is an issue, having said that money is so i would like to know if the gains with a TP would be noticed more so than a harrop
thanks in advance...
#39
_ass308_
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Posted 14 January 2010 - 07:30 AM
i love my tp duel plane hi rise.the driveabilty and trottle response is really nice.plus it makes very nice torque.
all fits under my scope.i even have a half inch spacer under the carb now.no problems.air cleaner is a kn,14x4 inch with a inch and a quater drop base
.
this is the height difference between a holden tourquer manifold,and the tp hi rise duel plane
looks good on the motor
and in the car
all fits under my scope.i even have a half inch spacer under the carb now.no problems.air cleaner is a kn,14x4 inch with a inch and a quater drop base
.
this is the height difference between a holden tourquer manifold,and the tp hi rise duel plane
looks good on the motor
and in the car
#40
_@milco@_
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Posted 14 January 2010 - 11:53 AM
i love my tp duel plane hi rise.the driveabilty and trottle response is really nice.plus it makes very nice torque.
all fits under my scope.i even have a half inch spacer under the carb now.no problems.air cleaner is a kn,14x4 inch with a inch and a quater drop base
.
what are your engine specs?
How much room do you have between your air fiter and top of the scoupe?
How much did you pay for the manifold?
damn! it looks nice !
Edited by @milco@, 14 January 2010 - 11:53 AM.
#41
_ass308_
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Posted 14 January 2010 - 09:50 PM
hi @milco@
not much room left under scope.i wouldnt put a inch spacer on it.i have torana engine mounts to btw
manifold was around $800
rough specs
holley 750 dp
355
very.mild head work,standard vales
11.5 comp
no port matching
full balance
cam=236@50 which doesnt really rev past 6 grand,with a 355.works well with the duel plane.
the motor makes the same amount of torque as horse power,with exelent drive ability on the street
not much room left under scope.i wouldnt put a inch spacer on it.i have torana engine mounts to btw
manifold was around $800
rough specs
holley 750 dp
355
very.mild head work,standard vales
11.5 comp
no port matching
full balance
cam=236@50 which doesnt really rev past 6 grand,with a 355.works well with the duel plane.
the motor makes the same amount of torque as horse power,with exelent drive ability on the street
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