No doubt that quality rods and crank are a must have for a race motor. Don't
know what kind of cranks you GT6 guys use, but if you go for a billet crank I
suggest you have the rod journals sized to fit good old American V8's...the
choice of good rods in what ever length you want is infinite and at half the
price of Carillo's...not to mention that the choice of bearings is also
infinite...we are using Manley H beam rods from a Ford modular engine in one
motor and Scat H beam chevy rods in the other one and have had no problems
turning the TR3 motor to 6500 and occasionally 7000.
-----Original Message-----
From: Fot [mailto:fot-bounces@autox.team.net] On Behalf Of Scott Janzen
Sent: Wednesday, December 09, 2015 9:07 AM
To: Spitfire Racing
Cc: FOT list
Subject: Re: [Fot] GT6 Connecting rods
I think it depends on what you want to do with the car. Both my race motors
have Carillo rods in them - one component I have no worries about. Beware those
pesky little bolts on the Carillos - use a stretch gauge, not a torque wrench,
cuz if you over-stretch one they are about $45 each, but I digress.
My motor sees 7,000 rpm five times a lap at Summit Point, so in a 12 lap race
that's 60 cycles to redline over about 20 minutes. I like having parts I can
rely on. There are enough other weak points in a GT6 to fix!
When I originally got this car, it had six beautifully lightened, balanced and
shot peened stock rods with ARP bolts. You could do that for a lot less money
and probably be fine for 6,000 rpm regularly.
So, reliable competitive race car (Carillo), or fast street car/back half of
the pack race car (improved stock), or fast race car if it doesn't blow up
first (Chinese)? Keep in mind that back in the day they ran stock rods to
8,000 rpm.
If you are on a budget (we all are at some level, right?) and want to get on
the track sooner than later - go for "stock" and know the limitations of the
engine. You can always upgrade later- that engine will not be "one and done",
so you will have it apart every other year at a minimum and can swap out rods.
But I agree with Russ- don't buy the knockoffs and delude yourself that they
are as good as the real stuff- that will just lead to catastrophe down the road.
Sent from my mobile device
On Dec 9, 2015, at 8:02 AM, Spitfire Racing <spitfire_racing@twcny.rr.com>
wrote:
A properly built and modified race engine represents a mighty investment not
only of dollars but of time. Is that really where you want to pinch pennies?
After all, with the exception of pistons and crank that is one of the primary
components and all it takes is one piece inside an engine to reduce all your
work and investment to nothing more than scrap metal. One seized valve, or
substandard bolt even can be a disaster. It doesn't take much.
Realize all the ancillary invested expenditures that are also at risk like a
weekend's entry fee you lose in an engine failure; the cost of time off from
work to go to a race weekend; the cost of food and lodging for the race outing
and the cost of just getting there. When asked, I usually advise folks to
figure a race weekend is ~$1000 minimum when you roll all in.
A number of racers have run Pauter rods as stated before by Bill and these do
present a less expensive alternative. I had the opportunity to rebuild an
engine last year with Pauter rods and they were quite substantial and were well
designed, constructed and balanced. Personally I have seen far too many Chinese
knock-offs; reproductions (call them what you will), that fail to come close to
the parts they try to mimic.
I suggest you perhaps delay your build until your war chest allows for top
quality internals. Do it once and do it right the first time and reduce the
potential for disappointing expensive disaster.
Russ Moore
Spitfire #49
-----Original Message-----
From: Fot [mailto:fot-bounces@autox.team.net] On Behalf Of Jamie
Sent: Wednesday, December 09, 2015 6:22 AM
To: McKearn McKearn
Cc: FOT list
Subject: Re: [Fot] GT6 Connecting rods
Although I was initially very wary, they have worked well for over 1,000 race
miles in our (horror) MGB engine.
Jamie Palmer
> On Dec 8, 2015, at 11:52 PM, McKearn McKearn <mckearn2@gmail.com> wrote:
>
> Hi Gents.
> I am looking for feedback on the MaxSpeeding connecting rods for GT6.
Can't afford Carrillos and I'm hoping these are good. Also am still searching
for an aluminum flywheel without having something custom made. and would like
input on what type of clutch to use as well . Lets call it a race car for the
sake of argument....
> Thanks. P.J.
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