Best headers Choice? - Team Camaro Tech
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post #1 of 16 (permalink) Old Apr 18th, 01, 02:33 AM Thread Starter
 
Join Date: Apr 2001
Location: Bic ,Qc ,Canada
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Question

What is the best choice between
thorley (triydesign)or flotech afterburner?
I need torque and economy for a 400ci small block.
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post #2 of 16 (permalink) Old Apr 18th, 01, 03:49 AM
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I have heard good things about both.
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post #3 of 16 (permalink) Old Apr 18th, 01, 05:09 AM
CJ
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I've had good results with the Doug Tholey tri-y design in my '68 4 speed car. These headers also have excellent ground clearence.
They are the only ones i've seen that don.t hang below the subframe.
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post #4 of 16 (permalink) Old Apr 18th, 01, 05:31 AM
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John
 
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Hey CJ, how do they fit? Mainly around the steering box.
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post #5 of 16 (permalink) Old Apr 18th, 01, 08:49 AM
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I have the tri-y on my 69 with auto, power steering and ac. They are close to the AC box but have been great so far.
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post #6 of 16 (permalink) Old Apr 18th, 01, 09:06 AM
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Just my opinion but the flow tech headers are junk!
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post #7 of 16 (permalink) Old Apr 18th, 01, 09:21 AM
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What kind of problems did you have with Flow Tech it looks like a good idea

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post #8 of 16 (permalink) Old Apr 18th, 01, 09:36 AM
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A buddy of mine just installed the 'Afterburner' Flow Tech's on his Suburban... Anything I should warn him about is appreciated...

------------------
...Dennis
'69 RS Convertible w/SS trim
'96 Z28SS #1679 of 2410
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post #9 of 16 (permalink) Old Apr 18th, 01, 09:47 AM
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Cool

I heard the tri y headers arnt as good.....the runners are not equal lengths....so your hp no's are lower.
got no facts to back it up though.

i WOULD spend the xtra cash on coated headers though....what a diff in looks!! and they stand up to abuse too!
helps cooling of the header also.
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post #10 of 16 (permalink) Old Apr 18th, 01, 03:56 PM
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I've seen some tests done on the Tri-y and they had really good numbers especially in the lower rpms and produced good torque.
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post #11 of 16 (permalink) Old Apr 18th, 01, 04:02 PM
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A buddy and I just put Doug Thorley's on my 68 327. Headers had to fit around angle plug heads, power steering and clutch linkage.

They are AWESOME. Jacked the car up and installed from below. Only had to disconnect the clutch linkage.

CJ's right--ground clearance is great. In fact, they're even with the frame if you get down and look at my car. Nothing hanging below the rail.

These puppies have nice, fat flanges on them too. Go with the Doug's.


------------------
http://albums.photopoint.com/j/View?...248&p=36735341
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post #12 of 16 (permalink) Old Apr 18th, 01, 04:23 PM
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i now have coated hooker headers and they fit fine. no rubbing at all. The drivers side does hang down lower than the passengers, but i have new springs and koni shocks and have no problems.
My car has a 350, ps, a/c and is an auto trans.
They are quite a bit less expensive than the Thorley, and are coated with jet hot coating rather than nickel finish, which i hear will tarnish.
Hope this helps,



------------------
My '69 Camaro Convertible
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post #13 of 16 (permalink) Old Apr 18th, 01, 06:58 PM
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ok now i get to talk header's...... .

tri-y:
good for low end power and tourque, good for gas milage. increses performance over stock manifold's at high RPM.

equal length:

tuned for a specific RPM range. to get the most out of this type you need to have the header match your cam and power band and the flow of the motor.

IMHO the Tri-Y is the best for street car's. a street car spend's most of it life at low RPM's, under 5000RPM, and benifit from this type of header the most. it is about as close as you can get to a 180* exaust system. this is what a race car has, like a busch or nascar uses. equal leanth header's are best for a dragster, as you try to keep the motor is a very tight RPM/power band the whole run.

there is alot of resurch out there on this, thorly's web site has the best explanation of the Tri-y type i have seen.
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post #14 of 16 (permalink) Old Apr 20th, 01, 06:42 AM
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MR69 so those hookers clear the steering box and the shifter linkage on the drivers side? I have flowtech on the car now and they hit both places. 350 eng. th350 p/s a/c on my car.

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post #15 of 16 (permalink) Old Apr 20th, 01, 12:53 PM
 
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Unless things have changed since I spoke with Hooker about a problem I have with the coating on my headers they are not coated by Jet Hot. Hooker does their own coating and it lasted almost 3 years on my daily driver.
www.chevelles.com/showroom/hookerproblem.jpg
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