>>-Diagnosis: The carb is untouched, so this is
suspect, as the engine flows
better then before>>>>>>>>>
Avi,I think that the DGV should be rejetted. Check
out Paul Tegler site and follow his directions on
choosing the jets.
1978 Spit
1534cc
.040 over
TR6 pistons
shaved head (him or the car???)
CR...9.75/1
mild cam
primary idle jet..............55
primary main jet.............140
primary emulsion tube...F50
primary air corrector...160
secondary idle jet...........50
secondary main jet............135
secondary emulsion tube..F6
secondary air corrector..165
This straight off his site.(I saved you a step!!)
I have a DGV jetted close to this but not quite as
aggressive because I have done any internal work
yet other than shaving my head (on the Spitfire!!)
Believe him..He knows his stuff!!!!
Dave Gebhard
----- Original Message -----
From: <A666K@aol.com>
To: <spitfires@autox.team.net>
Sent: Friday, June 01, 2001 6:44 PM
Subject: Motor Gurus
Hello all,
-I finished rebuilding my motor and finally got it
fired up. Broke in the new
cam and adjusted everything to spec. I would like
to get some opinions on a
problem I am experiencing.
-Problem: The engine will start missing at around
2000-2500 rpm. It will let
me rev higher if I just a blip it, but if I try and
drive it, the revs will
just drop when they hit that range. (It starts
missing and the tach starts
dropping.)
-The engine: It is now a 40 over, 9.6:1
compression, 1534 cc motor. The head
received porting and bigger inlet valves. I am
using the same carb (DGV),
ignition (Crane xr3000) as before the rebuild. but
a new 4-2-1 Rimmer header.
The cam comes from TSI (275), and is new.
-Diagnosis: The carb is untouched, so this is
suspect, as the engine flows
better then before. The (electric) tach seems to
be dropping quicker then
the engine, could the ignition be bad?
-Questions: How can I better diagnose the problem?
Any other suggestions?
Any comment will be greatly appreciated.
TIA,
Avi& Cheech the '78 Spit
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