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Bud, I'm running 34 degrees from 3500 up and could probably go more. I used
to run 36 with an older, lower compression engine, but that was with a
pertronix set up. Currently using a points system from Jeff at Advanced set
up (19 degrees mechanical advance up to 3500) for this cam (APT-BK74) and
compression ~ 13.2. No knocking, no overheating, could probably go some
more still tweaking the fuel system.
mike h
On Sat, Nov 21, 2020 at 1:46 PM Bud Rolofson via Fot <fot@autox.team.net>
wrote:
> Listerati,
>
> I=E2=80=99m curious what total advance you Spifire racers are using @3000=
-4000 RPM
> and up?
>
> I had someone in New Mexico swear that he runs 48 degrees @4000 RPM and
> backs down by 2 degrees until it doesn=E2=80=99t knock on WOT. I=E2=80=99=
m not sure I=E2=80=99m
> brave enough to run that much advance.
>
> What say you list? What total advance are you running at what RPM. And
> what compression ratio?
>
> I=E2=80=99m running 36 degrees total advance @ 3000 RPM for a 12.52 compr=
ession
> engine and that=E2=80=99s worked pretty good so far. But I=E2=80=99m alwa=
ys looking to get
> out of the corners faster yet pull hard in the straights sooo=E2=80=A6=E2=
=80=A6??
>
> Thanks
> Bud Rolofson
>
> Extreme Parts Racing (more than just a haircut)
>
> 71TR6 CC57365 (Good 6)
> 71 Spitfire MK IV Race Car #3
> 69 Spitfire MK III (back up FE engine/dinghy car)
> 93 Minnie Winnie Race Support Vehicle
> 77 Z-50A Hardly Davidson Honda Mini-Trail Bike (Triumph Pit Bike)
>
> _______________________________________________
> fot@autox.team.net
>
> http://www.fot-racing.com
>
> Donate: http://www.team.net/donate.html
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>
>
>
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<div dir=3D"ltr">Bud, I'm running 34 degrees from 3500 up and could pro=
bably go more. I used to run 36 with an older, lower compression engine, bu=
t that was with a pertronix set up. Currently using a points system from Je=
ff at Advanced set up=C2=A0(19 degrees mechanical advance up to 3500) for t=
his cam (APT-BK74) and compression ~ 13.2.=C2=A0 No knocking, no overheatin=
g, could probably go some more still tweaking the fuel system.<div><br></di=
v><div>mike h</div></div><br><div class=3D"gmail_quote"><div dir=3D"ltr" cl=
ass=3D"gmail_attr">On Sat, Nov 21, 2020 at 1:46 PM Bud Rolofson via Fot <=
;<a href=3D"mailto:fot@autox.team.net";>fot@autox.team.net</a>> wrote:<br=
></div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;=
border-left:1px solid rgb(204,204,204);padding-left:1ex">Listerati,<br>
<br>
I=E2=80=99m curious what total advance you Spifire racers are using @3000-4=
000 RPM and up? <br>
<br>
I had someone in New Mexico swear that he runs 48 degrees @4000 RPM and bac=
ks down by 2 degrees until it doesn=E2=80=99t knock on WOT. I=E2=80=99m not=
sure I=E2=80=99m brave enough to run that much advance.<br>
<br>
What say you list? What total advance are you running at what RPM. And what=
compression ratio?<br>
<br>
I=E2=80=99m running 36 degrees total advance @ 3000 RPM for a 12.52 compres=
sion engine and that=E2=80=99s worked pretty good so far. But I=E2=80=99m a=
lways looking to get out of the corners faster yet pull hard in the straigh=
ts sooo=E2=80=A6=E2=80=A6??<br>
<br>
Thanks<br>
Bud Rolofson<br>
<br>
Extreme Parts Racing (more than just a haircut)<br>
<br>
71TR6 CC57365 (Good 6)<br>
71 Spitfire MK IV Race Car #3<br>
69 Spitfire MK III (back up FE engine/dinghy car)<br>
93 Minnie Winnie Race Support Vehicle <br>
77 Z-50A Hardly Davidson Honda Mini-Trail Bike (Triumph Pit Bike)<br>
<br>
_______________________________________________<br>
<a href=3D"mailto:fot@autox.team.net"; target=3D"_blank">fot@autox.team.net<=
/a><br>
<br>
<a href=3D"http://www.fot-racing.com"; rel=3D"noreferrer" target=3D"_blank">=
http://www.fot-racing.com</a><br>
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et=3D"_blank">http://www.team.net/donate.html</a><br>
Archive: <a href=3D"http://autox.team.net/archive"; rel=3D"noreferrer" targe=
t=3D"_blank">http://autox.team.net/archive</a> <a href=3D"http://www.team.n=
et/pipermail/fotUnsubscribe/Manage" rel=3D"noreferrer" target=3D"_blank">ht=
tp://www.team.net/pipermail/fot<br>
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<br>
<br>
</blockquote></div>
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