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Forum: Do It Yourself, Boating on a Budget

12-31-2017, 11:23 AM

Replies: 12

Scarab 29 engine raise help

Views: 1,981

Posted By Scarab29Aj

i will definitely try a pitch down. I had mirage...

i will definitely try a pitch down. I had mirage +23 originally on it and first water tests would instantly blow the props out. Should have tried spinning them out right then.

Forum: Do It Yourself, Boating on a Budget

12-31-2017, 11:17 AM

Replies: 12

Scarab 29 engine raise help

Views: 1,981

Posted By Scarab29Aj

i did figure about a 75 hp increase a side. Just...

i did figure about a 75 hp increase a side. Just thought my new numbers vs old numbers would be further apart with the drive height change.

With the prop slip numbers i was surprised also. GPS...

Forum: Do It Yourself, Boating on a Budget

12-31-2017, 11:10 AM

Replies: 12

Scarab 29 engine raise help

Views: 1,981

Posted By Scarab29Aj

Sorry about that. Originally they were 350...

Sorry about that. Originally they were 350 engines.

Forum: Restorations & Upgrades

12-30-2017, 12:43 PM

Replies: 22

Scarab 29 raise engines?

Views: 4,414

Posted By Scarab29Aj

The engines have not seen a dyno. When the build...

The engines have not seen a dyno. When the build was done we tried the factory mirage +23 and it would not plane. I borrowed some bravo 1 26p but didnt spin above 3200 rpm @ 41 mph because i was...

Forum: Do It Yourself, Boating on a Budget

12-30-2017, 12:34 PM

Replies: 12

Scarab 29 engine raise help

Views: 1,981

Posted By Scarab29Aj

I did keep the factory induction system. And the...

I did keep the factory induction system. And the motors have not seen dyno time. The props are spinning inwards also.

Forum: Do It Yourself, Boating on a Budget

12-30-2017, 02:46 AM

Replies: 12

Scarab 29 engine raise help

Views: 1,981

Posted By Scarab29Aj

Scarab 29 engine raise help

Not long after the purchase of my1997 Scarab 29 i realized the transum was rotten. Pulled the vortec scorpion MPI engines and did 2 new 383s with just under 10:1 compression with Comp Cams XR276 cams...

Forum: Restorations & Upgrades

12-30-2017, 02:17 AM

Replies: 22

Scarab 29 raise engines?

Views: 4,414

Posted By Scarab29Aj

Mistake or missing something

Well after a repower from tired 350s to 383s with decent cams, vortec scorpion mpi, new everything, straight thru exhaust, drive height -2 with engine raise and running bravo 1 24 four blade we...

Forum: Restorations & Upgrades

01-17-2017, 10:27 PM

Replies: 4

383 xm276 cam choice and reversion?

Views: 1,174

Posted By Scarab29Aj

Good thread.Thanks!

Good thread.Thanks!

Forum: Restorations & Upgrades

01-17-2017, 09:46 PM

Replies: 4

383 xm276 cam choice and reversion?

Views: 1,174

Posted By Scarab29Aj

Thanks for the reply.

Thanks for the reply.

Forum: Restorations & Upgrades

01-16-2017, 08:14 PM

Replies: 4

383 xm276 cam choice and reversion?

Views: 1,174

Posted By Scarab29Aj

383 xm276 cam choice and reversion?

Im building twin 383 mpi engines for my 29 scarab. The boat has EMI manifolds and their short style aluminum risers. I'm really liking the looks of the comp cams xm276 but am worried about water...

Forum: Restorations & Upgrades

12-04-2016, 01:07 PM

Replies: 22

Scarab 29 raise engines?

Views: 4,414

Posted By Scarab29Aj

After doing a bunch of forum lurking and reading...

After doing a bunch of forum lurking and reading up, I think I'm going to raise the engines up a total of 2 inches. From others ive found that have done the same I dont think i will have too much...

Forum: Restorations & Upgrades

11-25-2016, 02:27 PM

Replies: 22

Scarab 29 raise engines?

Views: 4,414

Posted By Scarab29Aj

Good point on the center of gravity being ...

Good point on the center of gravity being raised...playing devils advocate, I wonder if having two engines could possibly cancel out some of the negative effects of the higher gravity. Just spitting...

Forum: Restorations & Upgrades

11-24-2016, 05:14 PM

Replies: 22

Scarab 29 raise engines?

Views: 4,414

Posted By Scarab29Aj

If i found that i went up too high...do i the...

If i found that i went up too high...do i the ability on a stock bravo 1 application to space the lower back down?

Forum: Restorations & Upgrades

11-24-2016, 02:32 PM

Replies: 22

Scarab 29 raise engines?

Views: 4,414

Posted By Scarab29Aj

Scarab 29 raise engines?

I have a 97 Scarab 29 twin 350 MPI with bravo 1s. Doing some transum repairs over the winter and a re-power to 383. While im into the transum I am thinking of raising the engines up +3" Current prop...

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