doza28
Well-Known Member
- Messages
- 309
- Location
- bournemouth, UK
Ive mentioned the issues im having in my build thread for the car, but a lot of people might not have been following that, so i decided to post here.
Im having issues with getting my G230 engine to run as i know it should.
Firstly, im not a newb. Ive had numerous 1/5 scale cars over the years... fgs, Hpis, Mcds
My MCD runs perfectly. No issues at all.
But this engine just will not run cleanly.
Ive had a few cases where i thought i had found the problem- mainly when i found the coil lead had broken. With this fixed, i thought id nailed it. Not so.
Spec
Zenoah G230 (stock as far as i know but apparently has had a new ring)
Compression is the same hot or cold and feels good
Standard CMR7 NGK plug
Fg Big Power Exhaust
Fg Inlet
990 carb.
Symptoms
Car starts fine after 2/3 pulls. Even without choke flap closed
Carb is set to 990 stock settings which i found as
low: 1 and 1/8 out
high: 1 and 5/8
Full throttle from idle : Car bogs low down as if its too rich but suddenly clears as it reaches top revs
If i lean the low speed out slightly (the tiniest amount) it then goes flat as if its too lean. Richen it up from stock position, and the car struggles to accelerate as if it just cant burn the fuel
The idle is stable, but not what i would call smooth.
I understand the H end needle covers the car from 1/3 throttle upwards, so i have also tried tweaking the high end needle by 1/16 and 1/8 of a turn either way. The engine still runs the same.
Other points i`ve noticed.
Gaskets have been replaced. I have still checked for leaks with WD and there are none
There is no fuel tank breather
The fuel does seem to be under pressure as when you disconnect either hose, fuel does squirt out.
The engine will also run with the fuel cap off
If you feed the power in gradually, it seems to behave. Its full throttle from standstill it doesn't like.
Is this a fuel pressure issue by not having a tank breather? The tank is the standard one as fitted to the Marder/F1/ Porsche models. I have seen posts suggesting the stock cap breathes fine as long as the hole albeit a tiny one, is clear which mine is.
Im stumped.
I love this car, but its really testing my patience.
Im having issues with getting my G230 engine to run as i know it should.
Firstly, im not a newb. Ive had numerous 1/5 scale cars over the years... fgs, Hpis, Mcds
My MCD runs perfectly. No issues at all.
But this engine just will not run cleanly.
Ive had a few cases where i thought i had found the problem- mainly when i found the coil lead had broken. With this fixed, i thought id nailed it. Not so.
Spec
Zenoah G230 (stock as far as i know but apparently has had a new ring)
Compression is the same hot or cold and feels good
Standard CMR7 NGK plug
Fg Big Power Exhaust
Fg Inlet
990 carb.
Symptoms
Car starts fine after 2/3 pulls. Even without choke flap closed
Carb is set to 990 stock settings which i found as
low: 1 and 1/8 out
high: 1 and 5/8
Full throttle from idle : Car bogs low down as if its too rich but suddenly clears as it reaches top revs
If i lean the low speed out slightly (the tiniest amount) it then goes flat as if its too lean. Richen it up from stock position, and the car struggles to accelerate as if it just cant burn the fuel
The idle is stable, but not what i would call smooth.
I understand the H end needle covers the car from 1/3 throttle upwards, so i have also tried tweaking the high end needle by 1/16 and 1/8 of a turn either way. The engine still runs the same.
Other points i`ve noticed.
Gaskets have been replaced. I have still checked for leaks with WD and there are none
There is no fuel tank breather
The fuel does seem to be under pressure as when you disconnect either hose, fuel does squirt out.
The engine will also run with the fuel cap off
If you feed the power in gradually, it seems to behave. Its full throttle from standstill it doesn't like.
Is this a fuel pressure issue by not having a tank breather? The tank is the standard one as fitted to the Marder/F1/ Porsche models. I have seen posts suggesting the stock cap breathes fine as long as the hole albeit a tiny one, is clear which mine is.
Im stumped.
I love this car, but its really testing my patience.