Have any of you guys had a head or intake ported this way, I'm thinking of trying it on my 086 head & HO intake.
2000 Z24 5spd header & catback for now.
to do an ho manifold is about $400
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Well I'm trying to extract every last hp/tq from my turbo engine buildup using my 086 head, HO intake, Eagle rods,JBP modded crank, Wiesco forged pistons yada, yada, yada. Since I was going to have the head & intake ported & polished anyway and my local race engine shop charges $600 for a street/strip port & polish on the head so the price is the same. Besides there's no other way to fully polish the inside of the HO intake so I'm willing to spend the money to attempt to make 500whp. Heck I'm even going to completely extrude hone my turbo for extra airflow.
2000 Z24 5spd header & catback for now.
Funny story,
I worked on the development crew for the SVT Contour which had an Extrude Honed intake manifold in production.
Because some creative minds worked a deal with the Government for a grant to test it for emissions and economy, it only cost Ford about $11 for each manifold.
I asked the top guy on the engine team what he really thought of the process and was it worth it based on the results.
His reply was........ Ford payed too much.
sig not found
^^^ I heard that it wasn't worth it either.
Dale Young wrote:Well I'm trying to extract every last hp/tq from my turbo engine buildup using my 086 head, HO intake, Eagle rods,JBP modded crank, Wiesco forged pistons yada, yada, yada. Since I was going to have the head & intake ported & polished anyway and my local race engine shop charges $600 for a street/strip port & polish on the head so the price is the same. Besides there's no other way to fully polish the inside of the HO intake so I'm willing to spend the money to attempt to make 500whp. Heck I'm even going to completely extrude hone my turbo for extra airflow.
if your looking for that kind of power, you want a different manifold.
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^ werd
Extrude honing is WAY too expensive for the return... on a J-body. Unless you've got $50k to throw at the engine alone... in which case.... you're nuts
One of my VR4 buddies had his head and intake manifold extrude honed. There were very minimal gains if any. I don't know if he ever had it dyno'd to see if he picked up any power but his et's were inline with his numbers prior to the hone.
Opfer benotigt. Keine Erfahrung notwendig.
Victims needed. No experience necessary.
JimmyZ wrote: I had this done to the head and intake manifold on my CRX and when I got the parts back the interior surfaces were almost a mirror finish.
you do realize your not surpossd to polish the intake right.... I may be wrong but I thought that it was common knowledge... you do not polish intake side to mirror finish because you NEED the turbulance to mix the air and fuel properly
Well I remember reading an article in Turbo magazine some years ago where Lisa Kubo completely extrude honed her head, intake and turbo and picked up 31 whp and 28 ft/lb of wtq from it with no other changes except reducing her boost from 27psi to 25 psi, so I guess it may not be as useless as some people think. I'm going to give it a try and see how it works out for me, because you could get a head ported by another means and it doesn't guarantee you of the expected results. I think one of the problems here is that you can never port a head, intake or anything else and expect to see major hp/tq improvments without adding more cam into the equation to take full advantage of the additional airflow you now have with the ported head, intake or whatever. I believe that's why Jonathan's friend with the VR4 saw no change in his performance after the extrude hone.
2000 Z24 5spd header & catback for now.
dont waste your time doing the ho manifold, you could just buy a custom manifold for about the same price.
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Dale Young wrote:Well I remember reading an article in Turbo magazine some years ago where Lisa Kubo completely extrude honed her head, intake and turbo and picked up 31 whp and 28 ft/lb of wtq from it with no other changes except reducing her boost from 27psi to 25 psi, so I guess it may not be as useless as some people think. I'm going to give it a try and see how it works out for me, because you could get a head ported by another means and it doesn't guarantee you of the expected results. I think one of the problems here is that you can never port a head, intake or anything else and expect to see major hp/tq improvments without adding more cam into the equation to take full advantage of the additional airflow you now have with the ported head, intake or whatever. I believe that's why Jonathan's friend with the VR4 saw no change in his performance after the extrude hone.
ROFLOL
Lets see. About 1200hp and 31 hp. 31/1200= 0.026 or in others words a 2.6%increase.
Translated downward, 180 x 0.026= 4.6hp
4-5hp for probably about $1000 in 'extruding'.
sig not found
These cars don't make 1200 hp on 25-27 # of boost. They run almost double that. (most in the 40's)
on the HO intake it might be SLIGHTLY worth it over the cost of cutting it open and hand porting it
on the head your better off porting by hand
and todd is in the right ball park , and im sure lisa was running more boost , but telling everyone it was lower , to keep them off track
but that does depend on when that article was done
i know the gm drag team was close to 1400 hp in the 40psi range
The article was from 2000 so I doubt that she was making 1200 hp at that time maybe more like 700 - 800. But the point I'm making is 31hp is 31 hp, if you have 31 hp more than your competition it gives you an advantage no matter how you look at it.
In any event I'm a firm believer in people being entitled to their own opinions as am I so I'm going to leave this subject alone by saying that I'm going to use the extrude hone process so I'll know for myself whether or not it works.
For years I was laughed at when I would discuss forced induction (turbos & centrifigals) when I said i would build my engine with 10: or 10.5:1 static cr and less boost to build my cylinder pressure. I was told by everyone of thses experts that it would never work the engine will blow no more than 8.5:1. Well look at all of the Fastest Street cars with turbos and they're all running 10.5:1 static cr with 20 + psi of boost and running in the 6's & 7's.
2000 Z24 5spd header & catback for now.
well just do us all a favor and get her dynoed as she is now, and then get her dynoed again after the honing to see some numbers. so for other people, we acctually have numbers to go off of. thanks.
Dale Young wrote:The article was from 2000 so I doubt that she was making 1200 hp at that time maybe more like 700 - 800. But the point I'm making is 31hp is 31 hp, if you have 31 hp more than your competition it gives you an advantage no matter how you look at it.
In any event I'm a firm believer in people being entitled to their own opinions as am I so I'm going to leave this subject alone by saying that I'm going to use the extrude hone process so I'll know for myself whether or not it works.
For years I was laughed at when I would discuss forced induction (turbos & centrifigals) when I said i would build my engine with 10: or 10.5:1 static cr and less boost to build my cylinder pressure. I was told by everyone of thses experts that it would never work the engine will blow no more than 8.5:1. Well look at all of the Fastest Street cars with turbos and they're all running 10.5:1 static cr with 20 + psi of boost and running in the 6's & 7's.
she was prob closer to 1000 , and for a 30 hp increase
wouldnt be the same increase on a 200 hp motor , you maybe see 2-4 hp increase
so 400.00 for extrudehoning a part for a 1000 hp motor to get the 30hp increase = worth it
on a street car to gain a 2-4 hp increase = not worth it
