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#31
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Re: ported/polished/coated manifolds 3Q's in 1
OIC. Who did your ceramic? I am seriously thinking about sending my exhaust manifolds out, and pondering the intake(probably to Swain). From the info I have gathered, It seems the general school of thought is to put thermal block on the gasket surface of the intake (and on the bottom of the intake on v8's where engine oil is slashing around down there), and to use a heat radiating coating(Swain calls it BBE) on the top, to help disperse the heat better. On the inside, Swain offers either a "flow coating" or the thermal block. I think the flow coating would probably be better suited for a carbureted car, since they talk about how it enhances the fuel atomization.
In other words, I don't know which way to go with the intake. At the moment, I'm leaning towards thermal block on the gasket surfaces and on the inside, and probably leaving the outside uncoated, since aluminum is a fairly good conductor of heat, I don't see how it would benefit me to coat the outside with a heat radiating coating. On the other hand, aluminum is a fairly good conductor of heat, so that engine bay heat will be trying to get in. I am sold on the White Lightening coating on the exhaust manifolds, though. And given the design of the stock units, it should be possible to have both the inside and the outside of the manifolds coated. |
#32
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Re: ported/polished/coated manifolds 3Q's in 1
Thermal Tech Coatings, Inc.
312 E. Poythress Street Hopewell, VA 23860 Phone: 877-754-9795 did my intake manifold, Johns valve covers and alternator, Sov13t's pistons, some other stuff. They also did Bill's exhaust manifolds, and I hear that the coating has flaked off of the exhaust manifolds. ALL OTHER PARTS THAT THEY HAVE DONE ARE FINE! To my knownege. As far as porting the intake, it has been tested to flow much more than any "normal" NA engine can use. Port matching does not hurt, just dont go too far. The Outlaw spacers are about 1/3" thick and do block heat well. More later.
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www.svxfiles.com The first SuperCharged SVX, the first 4.44 gears, the first equal length headers, the first phenolic spacers, the first Class Glass fiberglass hood, the first with 4, 4.44s in his driveway Fiberglass Hood thread My locker 4.44 Swap link |
#33
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Re: ported/polished/coated manifolds 3Q's in 1
and they did my intake manifold and valve covers (SVX R&D at its best)
-Bill Quote:
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Retired NASA Rocket Scientist Most famous NASA "Child" - OSIRIS-REx delivered samples from asteroid BENNU to Earth in Sept. 2023 Center Network Member #989 '92 Fully caged, 5 speed, waiting for its fully built EG33 '92 "Test Mule", 4:44 Auto, JDM 4:44 Rear Diff with Mech LSD, Tuned headers, Full one-off suspension '92(?) Laguna, 6 spd and other stuff (still at OT's place) My Locker |
#34
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Re: ported/polished/coated manifolds 3Q's in 1
Out of curiosity, what was the deciding factor for using thermal tech? I have been trying to pick the best one, and there isn't as much info on coatings as other mods. I have gathered, though, to stay away from Jet Hot.
I am leaning towards Swain b/c I have read a couple saying that Swain is the only coating that they haven't seen flake, and Swain claims their coating is .015" compared to .002" their competitors use. Of course sometimes I fall for that propaganda a little too easily. |
#35
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Re: ported/polished/coated manifolds 3Q's in 1
Good info on the intake, though. No need to go grinding away on something that doesn't need it. From the cutaways I have seen of other Subaru heads, it looks like they do a fairly good job on the ports, as well.
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#36
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Re: ported/polished/coated manifolds 3Q's in 1
I hope I didn't offend anybody
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#37
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Re: ported/polished/coated manifolds 3Q's in 1
Quote:
If the intake manifold were polished prior to being coated would it still have the smooth look on top, or would it give it that speckled look, like in your picture? How much would it be to have the manifold coated by those guys?? If it's not very useful to have the intake ported is it effective to have the exhaust headers ported if the engine is staying naturally aspirated for the time being??? And I'm still curious how much those spacers are..... |
#38
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Re: ported/polished/coated manifolds 3Q's in 1
Quote:
2)As I remember it was about $100.0 plus shipping at the time. 3)You have to look at the whole picture of flow. Port matching to reduce turbulance can help flow, but having a 2"id header flowing into a 1.6"id pipe is/can be a restriction. 4)The spacers were less than $100.00.
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www.svxfiles.com The first SuperCharged SVX, the first 4.44 gears, the first equal length headers, the first phenolic spacers, the first Class Glass fiberglass hood, the first with 4, 4.44s in his driveway Fiberglass Hood thread My locker 4.44 Swap link |
#39
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Re: ported/polished/coated manifolds 3Q's in 1
Quote:
"The Finished appearance of all processes are related to the surface preparation prior to coating. All defects in the surface will be replicated through the coatings. A smooth polished finish is HIGHLY RECOMMENDED" As I said, I have used both Airborn Coatings and Thermaltech They are both great to deal with and I have not had a single issue with the quality of their work and attention to detail. , .
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. Subaru Ambassador 1996 Polo Green LSi #216..138,100 miles...SOLD JFICX8659TH100216.....Date of Manufacture: November 16, 1995..... Fuji Heavy Industries..Ōta North Plant....Ōta City,. Gunma Prefecture, Japan In-Service Date: January 2, 1997 "The Pristine Green Polo Machine” First Polo Green on the Network First Clear front turn signals, JDM Alcyone hood emblem, rear panel, and BOXER engine cover on the Network (US) (2000) First 5000K HID factory fog lights (2007) First SVX JDM BBS wheels on a USDM SVX (2013) HID lighting (5000K) for headlight and H3 fog lights, PIAA SuperExtreme 120W high beams, rebuilt EG33 longblock, Cometic head gaskets, Phase II flexplate, AMR aluminum radiator with custom silicone hoses, 160A high-output alternator in aluminum-ceramic coated case, new design alternator wiring upgrade v.4, rare factory headlight protectors, refinished JDM BBS mesh aluminum wheels and custom, polished billet aluminum new hex center caps, LED grille mod, R1 Concepts high-carbon cryo slotted rotors, Akebono ceramic pads, Goodridge S/S braided brake lines, Smallcar Stage 1 shift kit, ThermalTech aluminum/ceramic-coated valve covers, Energy Suspension urethane front & rear swaybar bushings, Bontrager22 rear swaybar with QS Components Chromoly Teflon/Kevlar endlinks, "$15.00/5 minute" suspension mod. Hella Supertone horns, Custom stainless steel exhaust system with 2" headpipes, Magnaflow cats, AeroTurbine AR25 resonator /AWD "Bullet" muffler. R.I.P. 2010 Subaru Outback Limited 2.5 CVT...338,000 miles. Totaled by a 1,300 lb. COW March 4, 2016 2014 Hyundai Avante Limited ...178,000 miles. Actually quieter and smoother than the Outback 2007 Mazda Miata MX-5 PRHT...102,000 miles. Plenty of parts, service and windshields. 4th Registered Network member —2/21/2001 My NEW locker..I...My Email..I..Wikipedia/SVX . . Last edited by svxcess; 02-02-2009 at 09:31 AM. |
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