How fast is a 96' 22 Scarab with 502/415hp?
 

I know 1 guy that has the 454/310 mpi and it runs 70 ish. If a 502mpi were installed how much faster will it or should it be? Greg:p

Should be mid to high 70s

Roby

I would have said 70-ish on the 502. I'd have never figured the 330 would run 70-ish.

22 Scarab
 

Hey Greg,
I had a 22 with small block +- 400Hp ran 69.3 Gps with 6 adults & coolers squeezed in. Sold it just after I put that motor in & never bothered to check before the sale. It should do low to mid 70's
John

i had a 22 with 454 about 400 hp 65 on gps you might want to get a gps my speedo read 73/74 and was only doing 65 on gps spinning a labed 25 mirage.

454/ 330hp
 

This boat will run 61.1 mph on gps - sounds like the speedo is way off...With a 502/ 415hp I would guess 68mph

A buddy of mine has a 97 22 Scarab with a 350 Magnum. We did some upgrades to it, stainless marine exhaust, changed to a comp cam and cam kit, an Edelbrock intake and matching carb. also did a valve job.

The boat ran 52.3 on gps before mods and after it ran 54.5

With a 415 hp 502 I`ll guess at 62-65 and no more. This boat ran very bow heavy, we did find a slight hook and that is getting removed soon.

I had a '95 at one time. With the stock 330 it ran 70 on the speedo but 62 on GPS. Put on a set of rectangular port heads, Ultradyne cam, Edelbrock intake, Holley carb, and Eddie Marine exhaust. Ran 69.9 GPS with about 400 hp (desktop dyno said 420hp at 5000rpm. This lasted one season then I spun the main bearings probably because the stock 330 hp oil cooler couldnt keep up. Bought a new GM 502/502 and put it in. Stepped up to a 27" Mirage prop and the boat would do upper 70's but it was real loose after 75 GPS. You had to have perfectly flat water to get it above 75. The slightest ripple would start a chine walk that could get out of hand quickly. The boats do have a built in hook and they do tend to run bow heavy so dont run a stern lifting prop.

Ron

Just to clear up I was stating a speedo speed based on what I have seen my 7.4/310 run. I have not run one with a GPS. Mine runs 73/75 @ 4600RPM on the speedo.

Roby

rjcardinal,

How are you mounting that Anchor-shade? Is it just strapped down or have you found a new way to rig it on a deck plate?

Roby

I had a s 23'3" scarab SCS with a 502MAG, it would run low seventies GPS. Upper seventies on speedo.

This scarab Im reffering to that goes 71 on gps says on the title and on the EFI unit that its a 7.4 EFI?! From what Ive heard there were some 7.4s that recieved these typpe of efi before the vortec style were introduced. Im telling ya this thing flys, for what it appears to be. I will get the head castings to see of they are Rec. or not. Maybe someone has been in there already? Greg

I had a 89 22 ft with a SBC around 450 hp.
ran all day long at 60 and maxed out at 75GPS showing 76 speedo( hull pick up). Custom prop 3 blade was a mirage. Sold it and told the guy to use Super and or av gas(havasu) 1 week later he calls and said he blow it up. He ran cheap gas and only held it wide open for 5-7 min.
I call him dummy now

Have a friend here that has that rather uncommon engine package in a 23' Lavey. (I did all I could do to get him to spring for the Mag. when he ordered but he wouldn't spend the bucks) It also runs surprisingly well. We have seen it nudge to 70 on my handheld GPS on just the right day and a slight tailwind. --- Jer

Ok.......I'm the guy HPJunkie is talking about. I'm currently running a 96' 7.4LX mpi / 330 hp. It runs 71 on Gps and radar with a worked 25 p Mirage. Seems to run awfully strong for what it is? The boat handles fantastic and have shocked a lot of people I've raced. I will have my new 502/415 MPI motor in by next week with the help of HPJunkie. A 85hp gain. I just hope it rips hard!!!

good luck with your project.
On my last post I had all this in front of a ALPHA outdrive.
It di have a nose cone and SS gears in the lower

Enjoy
Rick

I had a 96 22ft scarab with a 454MPI (330HP). It had a 25P, 3 blade Mirage prop. The best I saw was 69.1mph/gps. More typical was 65-67mph. Motor would occasionally bump the rev limiter somewhere between 4600-4800rpms. My boating is in the big lakes of the Great lakes. Cool water and usually cool air. Use to loose 3-4 mph due to heat and humidity. Mirage prop did not like to stay hooked up on hard turns. Use to water ski with the boat. It could pull my 220lbs out of the water and stay on plane down to 22mph. The boat had a harsh ride when the waves got over 2 or 3 feet. I think it uses a 18 degree "V" rather than the typical 22 degree.

I occasionally take mine over to Lake Michigan off Chicago or Milwaukee,and have to say this boat is way to short to run in that rough water. I generally boat in the lakes and rivers in southern and central Wisconcin and No. Illinois. A lot smoother!
Steve

Today is the day out with the old and in with the new!! Any guesses on the speed? I say 76.5 Mph. Steve you got any pictures for these guys, I got this one. greg

YES, Send all available 22' Scarab pictures please.

Roby

Re: How fast is a 96' 22 Scarab with 502/415hp?
 

I have a 97 23' Scarab SCS with a 502 and it runs 76 on gps all stock w/25p prop. at sea level. http://www.isphub.net/wayne/scarab.htm

Re: How fast is a 96' 22 Scarab with 502/415hp?
 

I had a 1998 Eliminator 22 Eagle xp with the 502/415, eddie marine exhaust and ran a 28p Spinelli 4 blade at 78 GPS. That's smokin in that little boat. Fun!! Sometimes had a tendacy to chine walk... :D

Re: How fast is a 96' 22 Scarab with 502/415hp?
 

I have a 96 22' scarab with a full roller 454, dart heads, holley 850 double pumper carb and stainless marine exhaust. On gps turning a 25 mirage @5000 rps it will run a steady 81 mph driver only and about 15gals of fuel. This boat is a rocket. I have taken mine to ocean city maryland and ran with the big boys. They were speachless at the way this boat handles, and how fast it is. I have pics of the boat with the prop all the way out of the water. This is a great boat by far I have had 2 baja's

Re: How fast is a 96' 22 Scarab with 502/415hp?
 

I have to agree, These boats are a blast to drive. My best so far is 74 gps with full fuel,(60 gal) coolers, gear and 2, 180lb. guys.Never have run it light yet, usually when the coolers running low its time to take it easy. Figure I could run 76 with a light load. I love drivin this little rocketship, it's just rips! 81gps is just awsome! I too have owned bajas before. I like the scarabs over the baja's, much better in the rough stuff.

Re: How fast is a 96' 22 Scarab with 502/415hp?
 

I would agree. 76 has been on 1/2 tank and just me in the boat. The thing launches hard and goes to the red line fairly fast. I would like to swap my Marage Plus 25P for a 29P and see if I am still within WOT RPM range however I have not found any Mercruiser demo sites in my area that have anything other than outboard props. Anyone else done this?
P.S. Is Chine Walking that left to right tipping back and fourth that goes away if you trim down a tad? I get that starting at about 71 or 72 and if I trim down ever so slightly it goes away.
http://www.isphub.net/wayne/scarab.htm

Re: How fast is a 96' 22 Scarab with 502/415hp?
 

i owned a 1996 w/ 454 w/ some work done to it it ran 73 on speedo but on gps 65mph i dont think you will see 70 on gps.

Re: How fast is a 96' 22 Scarab with 502/415hp?
 

Last spring I installed a new 454 Mag HO with an XR/ITS package in a 94 22 Scarab. It ran 68 mph on GPS. We then installed a Sportmaster lower and gained 5 mph, 73 GPS. This boat also had the bottom blueprinted before the install.

Re: How fast is a 96' 22 Scarab with 502/415hp?
 

Biggus, Was that the boat the magizine article was on? Thanks, Doug

Re: How fast is a 96' 22 Scarab with 502/415hp?
 

81 MPH @5000 RPM with a 25 inch prop? WOW!! :rolleyes:

Re: How fast is a 96' 22 Scarab with 502/415hp?
 

Even with a 1.36 drive 81 mph is almost impossible to attain with a 25" prop and 5000 rpm. It would require a slip ratio of less than 10%.

With a 1.5 drive it requires a negitive slip ratio which is not possible.

All I can say is that your Scarabs are way faster than mine was.

Ron

Re: How fast is a 96' 22 Scarab with 502/415hp?
 

Well, humm...
I have a 1999 Donzi 22ZX with a stepped hull. These weigh about 3800lbs.

With the 7.4mpi, I could hit 63 gps on a perfect day, light chop and only me. Average was about 61. Speedo showed 70 ish...

I installed an HP500 which has way more hp than the 502mag, and now I have hit 77.1 gps (after three runs) at ~5,000 rpm. The 80mph Gaffrig II speedo is now BURIED, probably showing 85 or more... I am running a stock 28p Bravo prop, Bravo 1.5 drive. I 'might' be able to hit a real 80 this spring, once the bugs are worked out and a new prop is installed to get the rpm's up...

How is it that the Scarab 22's are so much faster than the Donzi hull????

Just curious.
BTW: I use a Garmin eTrex handheld GPS unit...

Kent

Re: How fast is a 96' 22 Scarab with 502/415hp?
 

Hey Kent I sense a bit of sarcasm :-) Here is the deal the 23' Scarab SCS is not the 22' Scarab. Very different boat.
Occasionally a boat that does not have Fountain or Donzi on the side sends engineers scratching their heads.
In case my Garmin GPS is not good enough here is some factory specs Mine is almost stock with the factory Mirage plus 25P.
82 on Guage and 76 on gps.

http://www.wellcraft.com/Images/CSer...rab_SCS_98.jpg

In case that is not enough here is a news article written
http://www.popularmechanics.com/outd...tml?page=2&c=y

ok I guess we all like what we have :-)

Re: How fast is a 96' 22 Scarab with 502/415hp?
 

According to his paperwork, my buddies 1997 22 footer only weighed 3200lbs. Thats with a 7.4/ B1.

Re: How fast is a 96' 22 Scarab with 502/415hp?
 

The 23' Scarab SCS is only 3740 ....

Re: How fast is a 96' 22 Scarab with 502/415hp?
 

I'm just having a little problem with some of these speeds. Its the math guys, the math. The math does not support these speeds. However, if "Popular Mechanics" says so I guess it's got to be true. After all, they are the authority on high performace boats. :D

Re: How fast is a 96' 22 Scarab with 502/415hp?
 

So the factory numbers also dont make it as well 75.1 hmmm .. Them damn engineers at Wellcraft musta left their calculaters home that day .. Call them up and educate them :-)

Re: How fast is a 96' 22 Scarab with 502/415hp?
 

I have a 97' 22 Scarab with 7.4/B1. With a 25 mirage+ 63.3 gps full of fuel. Happy speedo says 70+. From the Wellcraft link above, 75.1 mph with a 25 mirage, using a 1.5 ratio and 4920 rpm. If I figured correctly that comes up to 3.3% slip. Doug

Re: How fast is a 96' 22 Scarab with 502/415hp?
 

I'm not looking to get into a pissing match with anyone. Wellcraft Scarab is an excellent boat, they always were. However, you must realize that sometimes even engineers in the intrest of marketing tend to exagerate performance figures, because most of their customers do not know the relationships of RPM, prop pitch, and all the things that effect it. If you want to believe those figures, let the pleasure be all yours.

Re: How fast is a 96' 22 Scarab with 502/415hp?
 

Whaaaaaats up? Freezing ass up there? The Scarab runs too good for the power in it. You know I know the boat. I think the X-dimension is higher than most (factory rigger set up a fast one that day) and if I recall he has John Janaky do the Mirage prop. Later, Steve

Re: How fast is a 96' 22 Scarab with 502/415hp?
 

I think Ron is right about the slip factor, it takes my boat 5150 rpm 1.5 gear ratio 28 pitch Bravo 1 to get 75.4 mph on the gps. It's also a 30' hull with a step in it. I dont think you can turn 81 with a 25 pitch prop @5000 rpm and a 1.5 drive. I'm running around 17% slip wich is fairly effiecient.