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Old 11-07-2018, 07:24 PM
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I'm changing the direction of my 572's. They started life as Keith Eickert 1000s that had 10-71's on them. Sold the 10-71's due to hatch clearance issues with the 38 KV Scarab I was building at the time. I then purchased a set of Whipple quad rotors. So I began to buy all the parts to build around the whipples.

Then last week I threw in the towel on the 43 Scarab I was rebuilding, and now it looks like I'm going back to a 38 Scarab Thunder. With all that said, I do not need 1300 hp a side in a 38 Scarab. So I sold the Whipples and I'm wondering what else I may need to change. I'm thinking the cams may be a touch large for N/A so that is the real question here.

First the specs of the engines:
Dart Big M blocks with steel caps
Callies Magnum Cranks 4.375"
Carrillo Rods 4.56"
CP Pistons (these will be changed)
350 Canfield heads. Worked over by Valako flow 385/308 @ .65
TD Shaft Rockers
.903 Morel Ultimate Solid Lifters
Then the new cams I bought for this set up are 262/268, with .663 lift, 112 lope separation

Again the cams were designed around the whipples not an NA application. If I can run these great, if not then I don't have an issue with having new cams ground if I really need to go that route. I was going to run SM 3 manifolds, but I'm pretty sure I'm going to sell those and go back to the Thunder and Lightning headers. Thoughts on the cam? I'd like to end up at 750 hp. I think that power and the SSM 6's I have will make a nice combo for the 38.

As far as the fuel system goes. I'm not sure If I'll go carb or the Fast Multiport EFI set up. I'm leaning toward the fast set up.

So what are the opinions on the Cam for this engine. All of the parts to top of the line, so RPM limitations don't really matter here.

Last edited by endeavour32; 11-07-2018 at 09:00 PM.
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Old 11-07-2018, 08:35 PM
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Are these short or tall deck? Just curious because of the 4.375" crank.
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Old 11-07-2018, 08:35 PM
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Tall Deck
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Old 11-07-2018, 08:48 PM
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my thought? It is so bad you sold the restored scarab hull and worked on this 43 to go back scarab! you would be pretty close finished if you would have kept the 38 ! I feel so bad for you reading all this!
but I will definatly follow your progress wichever way you take!

good luck and keep it up !
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Old 11-07-2018, 08:58 PM
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While I loved the 38 KV as a kid, I ended up not really liking the flat deck when I owned one. Yes they look cool, but the cabin was totally impractical. Even bent over as far as I could practically bend over, I would still hit my back on the bulk heads. When sitting on the seats in the cabin, my head would hit the ceiling. When at the helm, the freeboard was far too low, and while the race hatches look cool, again totally impractical. The 38 KV in my mind is a cool boat to look at, but not to spend time in. The Gen 2 38's with the different deck fixed all of these problems plus MUCH better construction in the Thunder series. I really like the 43, but I don't like the amount of time I'm limited to, to fix it.

Yes I spent a lot of time on both of these boats, but I also learned a lot. So it wasn't a total waste.

Last edited by endeavour32; 11-07-2018 at 09:12 PM.
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Old 11-07-2018, 09:11 PM
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positivity is always good ! That's how I keep up with my chriscat resto too !
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Old 11-08-2018, 08:17 PM
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If the cam is ground for a boosted engine it will not be optimal for a NA application.
I believe a cam for a NA engine usually has more lift and duration than one for a boosted engine.

Last edited by Tinkerer; 11-08-2018 at 08:20 PM.
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Old 11-08-2018, 09:33 PM
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Supercharged engine just like a wider lsa with less overlap so your not just blowing the charge out the exhaust. What rpm you plan on turning WOT? Those are billet cams so you can always have bullet regrind. Kinda the opposite scenario however look at all the NA cams that work extremely well in SC applications. Example 731, 741. & 651 used and recommended for both SC and NA.
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Old 11-08-2018, 09:53 PM
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Keep them supercharged! Seriously
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Old 11-08-2018, 10:03 PM
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I'm just exploring ideas right now. I'm in liquidation mode, as I'm going to buy something different, as the 43 project is done. When I decided to sell off all the stuff I've accumulated over the past year, the only things I told myself I was going to keep were the long blocks, and SSM 6 set up. Everything else is going.

At some point though I need to have the blocks rebuilt, as that is never a quick process. When I need to do that I need to know NA or blown. If I stick with blown, it has to be Whipple or ProCharger, as I'm not about to have scoops.
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