Hi all,
I am busy with the FWF. I bought the VA 138 ( I think that's the right number), which is Van's firesleeved hose to go from the firewall bulkhead fitting to the engine driven pump (IO 360 M1B, if that matters). The hose is definitely very tight--hence too short. The first time I start the engine, something is going to rip out. Clearly, I need a longer hose. The question I was trying to sort out is, how much slack? If the hose is a really tight fit, is one inch longer correct or would two inches be better. How much is too much?
I mounted my oil cooler on the engine mount so there will be some differential motion there leaving me with the same question. The fuel hose from then engine driven pump to the fuel servo does not have any differential motion so I expect substantially less slack is needed there.
So, is there a good rule of thumb for sorting out slack?
Thanks,
Michael Wynn
RV 8 FWF
San Ramon, CA
I am busy with the FWF. I bought the VA 138 ( I think that's the right number), which is Van's firesleeved hose to go from the firewall bulkhead fitting to the engine driven pump (IO 360 M1B, if that matters). The hose is definitely very tight--hence too short. The first time I start the engine, something is going to rip out. Clearly, I need a longer hose. The question I was trying to sort out is, how much slack? If the hose is a really tight fit, is one inch longer correct or would two inches be better. How much is too much?
I mounted my oil cooler on the engine mount so there will be some differential motion there leaving me with the same question. The fuel hose from then engine driven pump to the fuel servo does not have any differential motion so I expect substantially less slack is needed there.
So, is there a good rule of thumb for sorting out slack?
Thanks,
Michael Wynn
RV 8 FWF
San Ramon, CA