Robert, I read this with interest. If I understand what you wrote correctly I
would summarize the major contributors to the 36 HP increase over stock as
cylinder head work (P&P, springs, etc), new cam (more duration and lift), and
higher compression ratio (9.5:1). If this is correct, was it with a free-flow
exhaust?
Best wishes
John Lumia
Robert wrote:>
>On Sat, 11 Dec 2004, Marty Sukey wrote:
>> Hmm, I am thinking Mr. Lang has screwed up and mistakenly given away one
of
>> his speed secrets. Maybe his is running one of those unobtainium
>> crankshafts and that stuff just weighs more than we thought.
>Drat - they're on to me....
>Oh well, here's the build sheet on the red car:
>stock block, "a" stock pistons with 130k miles... new rings at about 110k
>miles. Stock crank turned .010 because the journals were out of round
>after 110k miles. NOT BALANCED!
>Stock flywheel, stock clutch (LUK).
>Head - reworked a tad. Port matched, stock valves. There are a couple of
>hardened seats because I had some valve recession when I had some ignition
>timing that cause a lot of backfirng on decell... e.g. burned exhaust
>valves and seats. I "blended" the seats to the pockets. I use single valve
>springs from the '72 TR6 (I think this is right... there is one year that
>they didn't use the double springs - but I use STOCK springs set to about
>50 lbs of seat pressure). The head is cut to 9.5:1 compression.
>Cam - Rick Cline street cam. 272 duration and about .400 net lift at the
>valve. Stock rockers and pushrods (although the stock pushrods are def.
>out this winter for a couple of reasons). Rockers are rebuilt from Rocker
>Arm Specialists.
>Ignition - Mallory dual points setup with the factory advance curve. Fat
>wires (currently 7mm soon to be 8mm) from MSD and either a Crane PS20 coil
>or an MSD Blaster 2 coil.
>Stock carbs with stock TR6 needles. The shafts were replaced at about 110k
>miles.
>Estimated power is 140 HP at the flywheel.
>Stuff to do this winter - roller rockers?, new pushrods, new header?? New
>tuned exhaust??? Fix the stupid front main seal leak AGAIN! :-) Figure out
>how to make the Mallory dual point into a "breakerless" system. I don't
>mind points, but I hate condensors (even if I can rpelace them on the
>roadside in less than 5 min.).
>Looks like the cat's out of the bag, so to speak.
>> Marty Sukey
Regards,
rml
-
-----------------------------------------------------------------------------
-
Bob Lang Room N42-140Q | This space for rent
Consultant MIT unix-linux-help |
Voice:617-253-7438 FAX: 617-258-9535 |
-
-----------------------------------------------------------------------------
-
------------------------------
|