We all know that the horizontal front half makes a big difference.Quote:
Originally Posted by CharlieN
The porting on the Special probably had to make up for part of that difference (together with the heads).
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We all know that the horizontal front half makes a big difference.Quote:
Originally Posted by CharlieN
The porting on the Special probably had to make up for part of that difference (together with the heads).
220...225...whatever it takes :D
I have a new set of heads with a tighter squish and plugged the two holes in the top of the tuner. Will be interesting to see if it makes a difference.
I also have a 32 x 15 ET again which is the prop that ran 94. I sold it and have been regretting it because Tim at Performance Prop cant get new ones from the foundry right now.
I actually talked to Ray about this...the 220 and excel share the same block and the heads are very close as well.Quote:
Originally Posted by Markus
I just put excel sleeves in my V4...should be interesting to see how it runs.
Not too shabby if I do say so myself. First time shooting base/clear. I had one spot that was a little rough and I wetted it one more time and got a little sag. Should wetsand out and look fine. Rookie mistake....
If anyone is ever doing this short mid thing on a V4 there is something I forgot to mention. The V6 mid fits but there is a slight difference. The bolt holes all line up perfect but the locating pins are slightly off and the top of the V6 mid is about a half inch wider. The pins are close enough that I just over drilled the holes in the mid a couple sizes, filled them with epoxy, coated the pins with release wax and bolted it together. The next day I pulled it apart and cleaned up the excess epoxy. I suppose after doing that you could drill deeper and insert longer pins if you wanted.
Im really liking how this back of the mid looks with the ridge blended in. Glad I took the time to do it and praying this thing doesn't crack!!!!!!
Attachment 303948
Interesting, the part number shows an interchange between the 4 and 6 on both the mid and upper plate.Quote:
The bolt holes all line up perfect but the locating pins are slightly off and the top of the V6 mid is about a half inch wider.
That's interesting, I my v4 mid is on an older v6 adapter plate with no mods required. I've never seen a difference, maybe its a year model thing....prior to this post the only difference I had seen was with flush port or without?? Learn something every day....
The gaskets interchange over many years which to me seems flush port is one of few changes.Quote:
maybe its a year model thing
Ill take a pic after dinner.
There is a different gasket in the late 90's...96 or 97 but I can't remember how it is different or if it's just a material change.Quote:
Originally Posted by CharlieN
This is the adapter (grey primer) sitting on top of the mid. You can see this mid is a little wider by the exact same amount on each side. Its too perfect to be warped from welding and the bolt holes all align perfectly.
Attachment 303972 Attachment 303973
There is also a different adaptor plate part number in 96..corresponds with the base gasket PN change.
Has anyone given any thoughts to dry stacking?
I had tapped a fitting into the water passage as you can see here and had it dumping outside the mid. This time I made the fitting larger and blocked 2/3 the passage down into the mid with epoxy. That will allow some water to still go down through the passages that cool the tuner.
Im trying to eliminate some water as I have a real bottleneck in the exhaust where the tuner is sticking down into the lower unit.
I am still dumping all my poppet valve water into the mid and need to address that. Probably just dump it all.
Attachment 303976
My adapter is a 94. The mid is unknown. Since I have no can in the mid, I am not running a gasket between the mid and adapter. I cut that part of it off.Quote:
Originally Posted by DoktorC
It was recommended to me to reduce water in the mid by ½. So I think where you are dumping part of the water inside the tuner and most of it from the outside by redirecting the poppet seems about right.Quote:
Originally Posted by Mr. Demeanor
Not sure if there would be value in redirecting any of the starboard head flow as well where that is outside the can and the poppet flow is no longer there..
If you decide to dump the poppet outside the mid, I will be very interested to see the results.. . I've always been concerned with overheating the gearcase, especially in a surfacing application like yours.