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Exhaust Headers on a 3000

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highoctanesj Avatar
highoctanesj Chris Scafario
Moorestown, NJ, USA   USA
Does anyone have experience running aftermarket headers on their Healey?

I would be curious to hear of any pros and cons, what make is preferred and is there a noticeable increase in temperature during normal road usage?

As always thanks for your input!

Chris

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Dougie Avatar
Dougie Doug Escriva
Portland, OR, USA   USA
In reply to # 194755 by originality Does anyone have experience running aftermarket headers on their Healey?

I would be curious to hear of any pros and cons, what make is preferred and is there a noticeable increase in temperature during normal road usage?

As always thanks for your input!

Chris

Hello Chris -

As a rule, anything to help incoming or exiting flow within the Healey's engine is a big improvement. I've had the custom race headers on my '57 100-6 MM for years.
I had them sand blasted and ceramic coated when new to contain the heat. Power increase was noticeable in the low end torque range, the sound increased due to the race exhaust system I fabricated at the same time. Kirk Manufacturing makes a nice street header for Healey's, I think it's worth it if you're not concerned with origanality. http://www.kirkracing.com/



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Racer Headers.jpg

San Jose, CA, USA   USA
Dougie,

Do you think the 'short stacks' on your carbs add much HP?

Bob

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Dougie Avatar
Dougie Doug Escriva
Portland, OR, USA   USA
In reply to # 194760 by Bob Spidell Dougie,

Do you think the 'short stacks' on your carbs add much HP?

Bob

Hi Bob -

At the time of that pic, the cam I was running had the short stack ram pipes showing the highest HP on the dyno. With time and further development and new cam, timimg, carb adjustments, my new larger 3" ram pipes are the shi.....t.


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'57 Motor Intsall 2017.jpg    88.6 KB
'57 Motor Intsall 2017.jpg

'57 Motor:Carbs 2017.jpg    76.6 KB
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highoctanesj Avatar
highoctanesj Chris Scafario
Moorestown, NJ, USA   USA
Dougie,

Thanks for the source! I just ordered my headers this morning.
Your engine is pretty mean! Would you recommend any other performance upgrades worth pursuing for more of a fast road car build?
So far, the rebuild to my original block has included a 20 over bore, high speed balancing, a rebuild of the head, my cam being reground to a slightly more aggressive BJ8 spec, the headers, and plans of jetting up the carbs and adding an electronic ignition.
Most of what I would really be after is low end power for real world road usage.

Thanks again!

Dougie Avatar
Dougie Doug Escriva
Portland, OR, USA   USA
Chris -

Sounds like you're putting a nice performance street Healey together. Now that you have the back end flowing well, I suggest this "free flowing" intake manifold. With the new headers and additional upgrades this will make a big difference. Oh, just forgot, if you have lightened the flywheel, you can take an easy 10-15 lbs off it, remain very "streetable" but have a quick reving Big Healey machine.

http://www.ahperformanceparts.co.uk/austin-healey/performance-parts/Fuel-Engine-Bay/FAST-FLOW-INLET-MANIFOLD-2.aspx#.WbH6SUqGMy4

highoctanesj Avatar
highoctanesj Chris Scafario
Moorestown, NJ, USA   USA
Dougie,

I followed your advice and ordered the intake. Thanks! I am also planning to see what I can do with my fly wheel.

Your experience and knowledge have been very helpful!

Chris

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Dougie Avatar
Dougie Doug Escriva
Portland, OR, USA   USA
That's great, most good machine shops car do this. Here's some info that might help.

http://www.britishcarweek.org/flywheel.html

Best

rusty1c Avatar
rusty1c Peter D
Antioch, CA, USA   USA
1961 Austin-Healey 3000 BT7 "RUBY"
1963 Chevrolet C10 "Rusty"
Chris,
Toms Import Toy Sales in Portland Oregon offers lightened flywheels for a really reasonable price, $160.00. They have them in stock and there is no sales tax added to the price.

http://tomsimport.com/new/index.asp

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highoctanesj Avatar
highoctanesj Chris Scafario
Moorestown, NJ, USA   USA
It been a COLD winter so far and getting really excited about getting my Healey back on the road.

The engine is back in the car and the new headers and high performance intake is in too, per the top of this thread but I am now left with the predicament of finding air cleaners that will fit with the new intake and HD8 Carbs in the car???

Hopefully one of the gurus on this site can give me some guidance! I am all ears!

Thanks Chris

63mechanic Avatar
63mechanic Ted S
Langley, BC, Canada   CAN
Remember Healey owners,
Intake stacks installed on the side draft carbs either SU,Weber or Dellorto's, do have an important job...
As the incoming air gets sucked into the engine, having a wide bellmouth radius at the end of the stack helps incoming air enter the carb and keeps the air from creating turbulence as it starts to pass through...
You want smooth rounded profiles ,no sharp transitions to upset air flow....
Turbulence is bad in the venturi, you want full volume,smooth flowing air
This is also the reason why the thermo spacer plates and ported cylinder intake ports are all the same sizes...

**Nice video Doug** ;-)**



Edited 1 time(s). Last edit at 2018-01-12 09:36 AM by 63mechanic.

RAC68 Avatar
RAC68 Raymond Carbone
Shore, Jersey, USA   USA
Hi All,

How is header warp addressed and eliminated today?

I would love to install both intake and exhaust high flow after market units as described and recommended. However, I tried installing exhaust headers quite a while back in the late 1980s (just after completing my total Healey rebuild) and it wasn't long before I had head-to-header leaks as a seaming header warp result. I would expect that my experience would not be duplicated with today's manufactured headers but have no understanding if my assumption is true or how it is addressed today.

Thanks,
Ray(64BJ8P1)

Dougie Avatar
Dougie Doug Escriva
Portland, OR, USA   USA
Never been an issue on my race car for over 10 years. I know Randy Forbes has had Kirk headers on this street Healey probably for 25+ years, no problems I'm aware of. Quality, well designed and well made headers should not warp, crack, or leak.

RAC68 Avatar
RAC68 Raymond Carbone
Shore, Jersey, USA   USA
Thanks Dougie,

My past experience has stopped me more then once but I trust your experiences more.

Ray(64BJ8P1)

Bill F BJ7 Avatar
Bill F BJ7 Silver Member Bill Fulcher
Dorking, Surrey, UK   GBR
Dougie, totally off at a tangent but would you be able to post a picture and/or description of your coil mount? Looks like it's not attached to the shroud to frame strut. After switching to an alternator and so losing the mount on the dynamo I made up a bracket that bolts to the shroud strut and holds the coil vertically but I'm not happy with it.
Thanks, Bill

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