Performance Spark Plugs

[Eircamae86]

What are the best plugs to buy for the 4age, Ive had the standard & TRD irridium & neither are able to handle the fueling in the race car, cutting the fuel isnt an option unless I can find someone still capable of programming a 1983 TRD e-prom ecu

[gon]

if the afr values are too rich no spark plug will help you ...
and you will eventually damage your engine if the afr is below about 10
try a fuel pressure regulator and reduce the pressure
but you should buy a wideband lambda sensor or you might damage your engine

[Eircamae86]

Im sure the fuel pressure is ok, its just the amount!!!, once the car is warmed up its ok, I tried to start it the other day & it took me 2 hours, warming up plugs works.
the cams are 11mm lift 320 deg,

[david]

Eircamae86 Wrote:Im sure the fuel pressure is ok, its just the amount!!!, once the car is warmed up its ok, I tried to start it the other day & it took me 2 hours, warming up plugs works.
the cams are 11mm lift 320 deg,

some race engines use 2 set of sparksplugs
1 set is the warmup plugs
and the other set is the race plugs
I guess the warmupplugs might be 1 or 2 degree hotter than the race plugs

[gon]

if you reduce the fuel pressure the fuel amount injected will also reduce....
that's what I was referring to.

[Eircamae86]

david Wrote:

Eircamae86 Wrote:Im sure the fuel pressure is ok, its just the amount!!!, once the car is warmed up its ok, I tried to start it the other day & it took me 2 hours, warming up plugs works.
the cams are 11mm lift 320 deg,

some race engines use 2 set of sparksplugs
1 set is the warmup plugs
and the other set is the race plugs
I guess the warmupplugs might be 1 or 2 degree hotter than the race plugs

I must buy 2 good quality sets, as you said 1 for warm up only, I leave the plugs sitting on the manifold of a hot car for about 10minutes, this usually works, but if it doesnt start 1st turn, the plugs fowl & the plugs must be removed/cleaned & warmed up again. Pain in the A$$

[Rossi]

I would try connecting up an AFR, and fuel pressure guage and see what it is reading, could upgrade to a more modern management system such as Motec if its really a problem.
Superb car btw!