The over-night temps keep getting colder in the Adirondaks. I will be pulling the I/O boat out for the season, this coming weekend. 
It has been a good season with the boat running fine. I made some significant changes during spring commisioning which included:
- New T5 ICM module (after chasing issues last season)
- New Edelbrock 1409 replaced Q-jet that seemed to always need tweaking and miss-placed tuning kit)
- New water circulation pump (old was dripping from weep hole)
- Power Steering pulley/serp belt service bulletin
- Normal tune-up/maintenance parts
I did play around with a 1" 4-hole carb spacer this season. After a thread on 5.0L volvo, decided to try it given the very low cost, and ease of installation. Testing with the spacer was not conclusive. I seemed to think there was a slight increase in throttle reposnse and maybe a slight wot speed. We are talking about only 1 mph change which can easily be day to day variation.
I did have some issues with it, that I think are related to the material type. I choose a phenelic spacer due to it was the lowest cost. I believe this provided too much heat isolation from my intake manifold to carb. I have an edelbrock aluminum performer intake over vortec heads. There is not any heat crossover and intake just gets mildly warm during running.
On a few evenings, before dark, I was getting fuel starvation symptoms while on plane. These evenings were cooler, and damper, ie evening where they will be dew on the ground. As soon as it would happen, would come off plane, but would go back, but happen shortly after. Every time I removed the flame arrester to look, didn't find icing, and plenty of fuel in carb bowl. But, that amount of time would easily of melted away. Removing the spacer (and changing nothing else), eliminated the symptoms, and have run it on two similiar type evenings.
Discussions with Edelbrock tech support, indicated it was a very viable scenerio, and recommended going to aluminum spacer.
Anyway, hope this is of interest to some. Sad to see another season over, and all the main discussion moving toward winterization. Hope you had a good season.
It has been a good season with the boat running fine. I made some significant changes during spring commisioning which included:- New T5 ICM module (after chasing issues last season)
- New Edelbrock 1409 replaced Q-jet that seemed to always need tweaking and miss-placed tuning kit)
- New water circulation pump (old was dripping from weep hole)
- Power Steering pulley/serp belt service bulletin
- Normal tune-up/maintenance parts
I did play around with a 1" 4-hole carb spacer this season. After a thread on 5.0L volvo, decided to try it given the very low cost, and ease of installation. Testing with the spacer was not conclusive. I seemed to think there was a slight increase in throttle reposnse and maybe a slight wot speed. We are talking about only 1 mph change which can easily be day to day variation.
I did have some issues with it, that I think are related to the material type. I choose a phenelic spacer due to it was the lowest cost. I believe this provided too much heat isolation from my intake manifold to carb. I have an edelbrock aluminum performer intake over vortec heads. There is not any heat crossover and intake just gets mildly warm during running.
On a few evenings, before dark, I was getting fuel starvation symptoms while on plane. These evenings were cooler, and damper, ie evening where they will be dew on the ground. As soon as it would happen, would come off plane, but would go back, but happen shortly after. Every time I removed the flame arrester to look, didn't find icing, and plenty of fuel in carb bowl. But, that amount of time would easily of melted away. Removing the spacer (and changing nothing else), eliminated the symptoms, and have run it on two similiar type evenings.
Discussions with Edelbrock tech support, indicated it was a very viable scenerio, and recommended going to aluminum spacer.
Anyway, hope this is of interest to some. Sad to see another season over, and all the main discussion moving toward winterization. Hope you had a good season.
