engine dyno
 

Matched set Mercury SuperCat race engines going in my 320 Velocity.
http://s265.photobucket.com/albums/i...t=ef5e67a0.pbr

That has got to make you anxious!

I'm anxious as a pig looking at a slop hole thru a gate. Leon at Derebery Performance is doing my rigging in Pottsboro, TX. Can't wait to hear both motors on the high end, they sound great with dry tails.

Very nice!! That motor was torquing that stand pretty well!

yeah that was pretty bad a**


good luck with the engines. should rip

NICE, what r-ya gona use for drives :eek:

Starting off with 380 K-planes, Imco 12" boxes / Imco HD gimbal and helmet / XR's W/1" lowers. First props will be 4 blade bravo 34 pitch

http://i265.photobucket.com/albums/i...K1Cpics001.jpg
http://i265.photobucket.com/albums/i...K1Cpics002.jpg
http://i265.photobucket.com/albums/i...CDRIVES001.jpg

That makes me feel all giddy inside.

You dash job looks awsome!!,Congrats on the motors,did ya find what rpm they peeked at? Keep us up to date.

Rob:ernaehrung004:

Thanks Strip, Your pull is over the top awsome. #'s 625 hp/ 615 fpt / 5800rpm

nice ,that thing is going to fly:drink:

i like!!! sounds killer!

http://i265.photobucket.com/albums/i...K1Cpics004.jpg

I'm running dry tail Stellings so you guy's may be able to here her where you live. Here we are test stabbing one of the engines, We still have a lot of bilge work cleaning and painting.

I think why we do this sh!t is so we can fly without wings. Not a whole lot of bling just business.

Wow, I'll be able to hear those clear across the lake. Makes me want bigger power :evilb:

Yeh, Hope we don't have any noise laws cause I'll be breaking them.:cool-smiley-027:

LOL, ever hear a fan boat at 5:00am?:eek:

OK...not take that motor to Reher & Morrison in Arlington and see what the REAL numbers are.

Is any dyno accurate on a given day? The dyno is however "repeatable". "Repeatability" is what you want in a dyno, test the same engine time after time and get the same results. Take one of say 10 engines all built the same, change headers or a cam on one of those engines so you get 5% more power, run it against all the others again. It runs 5% faster, you re-dyno it and it still says 5% better, now you have an "accurate" and more importantly, a "repeatable" dyno. Then take the 10 moters to Reher & Morrison for dyno's The numbers are not going to match the other guy's dyno numbers but one of the moters should be 5% better on their dyno as well. This isn't the first time a Mercury Supercat engine has been toned down from it's original 750HP and raceing fuel but from what I have seen with the same parts all dynoed about the same results as these.

Someone should make an alarm clock that sounds like that!! That would wake us up in the am.

Great pics!
 

Complete sweetness. Thanks for posting the dyno run picts and vids. Did I see 640 on that dyno? whoaaa!!! 1280 in a 32ft boat respect for sure.

Whose heads are you running?

Your rig ought to rock pretty hard when you get it all together.

I always wanted a twin engine ride, but didn't want to pay, maintain, insure, and fuel one. Thats what friends are for!

I went with a single Ilmor 710.


Uncle Dave
Laveycraft 2750 -710
Laveycraft 20.8 Sebring

Thats a sweet moter you have. These are Dart Big M blocks / Brodix heads and intake / Single fuel efficient Demon on top.
http://i265.photobucket.com/albums/i...ngines_004.jpg
Here's one of the slugs we pulled out when it made around 750 HP on race gas.
http://i265.photobucket.com/albums/i...ngines_013.jpg
And the new Diamons pistons we put back in to run pump gas.
http://i265.photobucket.com/albums/i...ngines_021.jpg

I need your old Pistons and ssofort.

PM me please !!!!!!!!!!!!!!!!!!!!!!!

Scott

VV, a supercat racing motor has around 800 HP they are just called 750's !

The # you have are not right even though you dropped from 14-1 to ,my quess 10-1 compression.
If you still have the drysump it should be more like 730- and wet around 690-700 and they should be still turning at 6200-6800 RPM easy. If you did not change the valvetrain.:eek:

We ran them up to about 6 grand on the dyno, I didn't have enough room for the dry sumps so we put pans on. I think Ray told me these were 9.5/1's we changed the cam everything else is the same. And I never got the cam specs. I talked to a guy the other day and he has supercats and race fuel said he was 45 min. at 7 grand and never looked back. So they have some good parts in them for sure.

Nice
 

Those are GREAT parts I know - sounds like the build names on my wicked 406!

Ive Got a demon 850 (w/red inserts) on my 406 Ive never used a finer carb they give you the response of stacks with a killer 4 corner idle and the simplicity of a 4 bbl. If you've never used one you'll love it.

Brodix heads are simply great- I have ported track 1's with 2.10 intakes- not the killer big block setup you have but Im very pleased with them and in a 21ft tunnel I can really haul coal.

Heres a few ilmor picts.

I want a ride in your rig.


Uncle Dave
Laveycraft 2750 -710
Laveycraft 20.8 Sebring

http://www.youtube.com/watch?v=B17q8XlR9DAThat is a nice set-up they should last you a long time. It gona be a dragen.

I hope he takes better care of you than he did me. I bought a pair of 575sci motors from him last August that he rebuilt from the ground up to match (blowers and all)-(took 3 months to build). Starboard side would stall so I had to send the computer back to him to have reprogrammed and install a new engine harness(2 months down time), the the port motor burned 5 qts of oil in the first 5 hrs of running. I found out that they (Derebery) didn't install the splash shield/windage tray, under the intake that caused oil from the cam to splash into the PCV valve(Leon said it didn't have one when he got it so he didn't install one during the assembly-a $40 part on a $17k motor-hmmm). I Got that fixed ,(another $1500 for diagnosis/parts/labor at Absolute speed and Marine in Havasu- 2 months down time) . Now last week the starboard blower rear plate came loose and locked up the blower with 23 hrs on it. Mooneyham in Upland Ca. said "whoever assembled the blower didn't tighten the bolts for the rear plate or the retainer bolts for the front bearings (3 of 6 loosened up completly and were dragging on the drive gears)"down another month.Now that being said, Leon said the blowers were subleted out so technically it's failure is not his fault, and after a year, not his responsibility, BUT his decision to use whoever to build the blower kind of lies on his shoulders, and I've had the boat for for 17 months and it was down for repair for 8 months due to them. I am left with the feeling I should have used a local builder and would have better recourse and/or success...Sorry for the rant..Happy boating.M

Well, I hope it does too. No one wishes the trouble you have had on any one. Leon is local to me and I am a repeat customer. I agree it is nice to be able to swing by and check out the progress.

Nasty
 

Dude that BLOWS!
It's also the first bit of bad PR Ive heard about Derebery.
Probably why you went there in the first place.

Any recourse form the blower shop?
Maybe you could show them Mooneyhams findings and ask someone to step up?

Ive always wondered why these shops dont keep a couple of proven set of medium performance engines around to rent to people while they re-build that way youre not down a whole summer with surprises and issues.

Bummer- I hope VV has better luck as well.

Uncle Dave

Laveycraft 2750 -710
Laveycraft 20.8 Sebring

Yes, this is why I delt with Derebery. First with Matt Bedoe (who left there), then switched to Leon. Both were very cordial as was the secretary. The thing is, they said the blowers were done by The Blower shop, here in Los Angeles. Either way, I understand that 14 months IS out of warranty. The engine missing the splash shield, on the other hand, was NOT a warranty issue, it was a workmanship issue that should have NO time limit. Leon offered me $400 in "store credit"-Not cash which is all I had asked for and thought THAT was MORE than fair . That is what it would have cost him, at his shop to pay a mechanic ($30 hr) to diagnose the problem, remove the blower and intake ,install the tray,gaskets and spark plugs (fouled). change the oil, set the timing and lake test it. Also I never got an itemized receipt that I asked for at least a dozen times..........Mike

Well Uncle Dave...sit down and read this...

I bought a motor from Leon. It was a 540 that he said dynoed on "HIS" dyno at 631 HP. The motor he pulled out of my boat was a 1989 454 with 330 HP. I had a cam in it and Merlin heads on it. The boat with the 454 and 990 hours on it and ran 71/72 gps. Leon put his 540 in the boat and it ran 1 mph faster with the "supposedly" 631 hp motor thanit did with the (maybe) 425 hp 454. He had 1 excuse after another...the boat...hook...its a sled...buthe NEVER got his ass in the boat to run it...he sent Matt out with it. Leon set the floats on the carb so high it wouldnt hardly idle. He told one guy that was there when I was there checking on it that the boat was an 80+ mph boat. This was before we ran it. I was happy and was niave enough to believe him. The boat ran 72/73. I was not happy being that I donated $16,000.00 plus to him. I also had a heating issue that I did not have before I had him do the 540. $2250.00 later, he corrected the heating issue. He also promised me that the boat would be done in 2 weeks...yea right...6 weeks later I got it back. I kept on him about the motor...something just aint right...631 hp and this damn boat runs 72/73 (1989 Baja 226 Islander)...1 mph faster than it did with the old motor. Matt even said the same thing about something not being right. Leon asked me if I gamble...I said yes. Leon says he will pull the motor out and put it back on ""HIS"" dyno and run it again. If it doesnt make 630 HP...he will give me $2000.00 and no charge to pull the motor and put it back. But if it DOES make 630 HP...I pay him $2000.00 plus shop cost to pull the motor and put it back. I was going to do it until I talked to a friend and he said...NO FRIGGIN WAY do it on his dyno, but go to a neutral dyno. I told Leon we will go to a neutral dyno and he crawfished...wouldnt do it. I got seriously pissed and pulled the motor out 3 months later and took it to Reher & Morrison in Arlington. 2 dyno pulls and the motor made 515 and 517 hp...if I remember correctly. If my memory is off alittle,its not much. I have all the paper work on it...I'm just getting pissed again typing this and too lazy to pull it out. The people at R & M showed me HOW Leon manipulated the numbers to get the high fudged numbers he gave me. They also fudged it to show me HOW he did it and it was very close to what Leon's dyno said...all total BULL-CRAP. I told Leon what we did and what we found and after that it was like he left the planet...he was not there...he was UN-available...he was with a customer...and he would NOT return a phone call. Hell...it would have been easier to get laid in a convent than to get hold of him. He screwed me over and laughed. The ONLY time he returned a phone call was when I told the lady up front...I think maybe his wife, but she is a very wonderful person...I was going home and talk to my attorney about all this crap. At first Leon was unavailable again, but I didnt get 10 miles down the road and he called with the sweet talk to calm me down. I listened to him when I shouldnt have. Since my experience with Leon Dereberry, I have run into MANY people with very simular experiences dealing with him. I do not believe a word he says and I think he is as dis-honest as one can get. The guy getting the motors done by him...I feel sorry for you dude. Whatever Leon tells you or shows you for a dyno sheet...I would not believe it. Take 25% to 35% away from whatever the numbers say and THAT will be close to what your REAL horsepower will be. I did not know that Matt had left, but I will bet anything that Matt knew that I was right. Matt was the "go-between"...I am not mad at him because he had to do what Leon told him to do...no problem. I am stiil massively pissed off at Leon, but I would like to talk to Matt sometime. I see Matt as a good guy caught between a rock and someplace, but I see Leon as pure LOW-LIFE to screw people over like he did me.

yeeesh!
 

Thats a horrible story-

I guess my Dereberry PR story needs a workover.
Id be supremely pist if this happened to me.

515 HP on a 540 is completely lame as my small block 406 with Brodix heads makes 500HP on a flat tappet engle-ep 20/22 cam. That mill should make 515hp with the cam sprocket off a tooth!

This 7-10 Ilmor is the first boat engine Ive owned that Ive never seen dynoed personally - I make the final payment contingent on HP delivery with all my builders because I want to make sure I get what Im paying for. (Ilmor engineering gets a "flyer" though)

I suspect VV's numbers are closer to the truth simply because of the parts he's using. It'd be hard not to make 600 ponies with that parts combo but there are a lot of ways to cheat a dyno as you say.

Thanks for taking the time to write even if it did anger you substantially just to rewrite it.

Dereberry negative PR noted.

Uncle Dave

Laveycraft 2750 -710
Laveycraft 20.8 Sebring

This is a video section and not the beware section, sorry to steal any thunder from the guy who started the thread,BUT. Yeah, it is amazing how hard it is to get a hold of Leon once you have a problem. "He's outside with a customer",or "He's lake tuning a boat", or "He's sick today". Yeah I heard them all. Didn't return my calls either until I said I was going to call a lawyer. But I am sure he is a pro at dealing with that by now with all of his dealings. I guess I should just get my $400.00 in spare impeller pumps and run...Mike

Did you ask him why a guy that had been building engines for as long as he has would miss a pretty standard issue like that since all the engines of that generation had these trays in them. I don't remember if the 575 was a genV or VI, but I am pretty sure it wouldn't have been the first one of that generation that he took apart or put together.

Wether it came that way or not, wouldn't you think that if the other one had it in there, it should have thrown up a red flag.

That stuff just pisses me off.

I make mistakes also, but my customers will tell you that I try or do make it right the best that I can. I once gave a guy a HUGE refund on the labor and more, because of a mistake that I had made, and let him keep all of the stuff and bought him a bunch of brand new parts. Lost my azz on that deal.

I know this doesent belong here, sorry.

But shouldent that boat still be faster then 1+ MPH with 180 HP more ????????

Let me tell you about my boat ,had the same thing .

Come to find out we mistacenlty changed gearset wrong.:eek:

Just a quess ??!!:party-smiley-004:

Wonder how much RPM and what prop and which gear ratio.

To only make it go 1 MPH faster !:food-smiley-007:

Yes-Sir...you are correct...with 180 more CLAIMED HP that Leon says that I had...I figure...and others...I should have at least run 80. Pure fact...Leon lied and he got caught. Did I go to the law...No...I prefer to handle it myself. I dont screw people and I wont tolerate being screwed. I will meet up with Leon one of these days and then it will be GAME ON.

For the guy that is getting his motors done by Leon. If your boat doesnt run right...you got screwed. I will bet...with odds...he pulled the same crap with him...fudge the numbers to get a higher HP reading on the dyno sheet. The guys at R & H showed me how to do it...I can dyno those motors for you and show that they put out 2000 HP each...with a single carb and no blower. Can I get an AMEN here...or what??

AMEN !:ernaehrung004:

Yeah same thing with me, engine builder dyno'd my motor after rebuilt ( 6K ). 675 HP. Befor the rb. we dyno'd 608 HP,
cause of rb. 2 pistons had 80% leakage !!!!!!!

Boat ran 2 MPH slower then befor rb. LOL

Come to find out motor had 500+ HP not 675 !

Now i have it back like it should be. ( 760-800 HP ) REAL HP !

To be clear here, Leon didn't build my engines I am having my boat rigged there. Leon Dynoed them. I thought the numbers were a tad low if anything.

They all suck you need to do everything yourself. 2 years ago I had a machine shop put my bottom end together to save me time. Well that fackfired the dumb A$$ did not leave enough clearence for the forged pistons and it smoked the rings.

I can't see why rigging dyno numbers would help anything the customer is going to know when he runs his boat by the speed gain or loss.

And the guy with the 454 with 990 hours on it that runs 71where is that engine at I want to stick it in the hall of fame for the longest lasting 454 I ever heard about in a boat. I want to pull that engine apart and see what made it blow up proof.