That'll do it. Lots of ways to get it done, pick your poison.

Will do the hook thing ASAP ,I just couldn't get to the boat lately, but I did call a reputable local marine hi perf shop today to find out about rates to dyno test the engines and I was told $1500 per engine, is this reasonable ? Thought it was crazy, am I wrong?

Uhh wait..
I dont think so. 3000 sounds real steep.

More like 1000 for a full day in the dyno with 2 engines (if you dont have any problems)

Isn't your builder going to supply the labor?
I thought he was dynoing them? Dosnt he "have a guy"?

You want the day rate for the room maybe with with an operator thats just sticking - and your guys does the setup & tuning.(and you have to help him schlep and setup and pull the carbs and jet- no one gets it right on shot one. )

Shouldnt take more than a day and half for both engines even if you have to take the manifold off and reseat it on each one.

Dig a bit and find out who is doing what.

Sounds like Friday may not be the day.


UD

Yeah, $1500 for both unless they need to make MAJOR changes and spend a ton of time.

I'll probably get crucified for saying it, but why not just dyno one and copy the changes to the other motor? It would be nice to run both however just to check for leaks/ minor isssues etc. I'd think your engine guy can at least run them for you.

He could do that- but then he goes through all that and has a still has a 50% chance of having a problem. Not worth it.

You can do that with jetting though and usually you are ok.

UD

You are right Friday won't be the day , sometime next week now !

He has a guy with a Dyno who obviously will charge me but I just wanted to get a quote fr somebody out of his circle and I got scared ehheheheh I will wait for his cost on the dyno , this other guy just got me off his back with the price he gave me.

Not sure what you mean, if it can be run I don't see much risk. Though as you said, the second one is USUALLY pretty easy, and I agree it's not maybe the best way but for $1500 I'd deal with it!!!

Yes UD gave me that idea before but as he said , I will go the extra mile and do it right.

I'm eagerly watching this thread. Hoping for the best for ya Diego. I will be building motors when I finish all cosmetics as mine runs good now. Curious what ya get.

I really like your boat , as soon as results are ready I will post them,

Thanks for your support.

Now, new question arises ,

I was going with edelbrock 750 cmf 1410 but I am really considering switching to Holley 750 cmf double pamper,

I need opinions , I already know that John (sprink58) loves these last ones and someone else also with a lot of experience in 383's told me that it will be tough to tune these engines with the edelbrocks

Holley carb with 750 cfm with annular booster's..they idomise the fuel better and will give you better throttle response..

is this the one?
this is the one i was thinking about :

http://www.streetsideauto.com/p/holl...FRR7nAodzmEAsA

Thanks Diego. You have a nice Lookin boat. We had a 23 nova growing up. Great boat.

Dont know anyone running an edelbrock on a boat.

I know there are many more but these are guys I've done work with and willingly send money to when it comes to carbs.

John and C&J engineering - guy has cleared up every problem I've ever had n/a or blown.

A.E.D- awesome shop.



Uncle Dave

Diego, I see that you tried to PM me. Feel free to shoot me an email. [email protected]

I switched from Edelbrocks to Holleys on my strokers and aside from having some float adjustment issues, I love the Holleys.

I'm not a carb guru nor do I ever want to be. When it comes to jetting and tunning I have to rely on my boating friends for help. Not a single one of them run Edelbrock carbs in a boat..........

Hey, thanks for your reply, after reading your thread i realized i had to go your route ,also John (sprik58) is a big fan of the Holley double p. so i went ahead and order a couple and returned the Edelbrocks.
Thanks again.

More news,

this is getting interesting, i have just talked to Laz from Mesa Balancing who gave me a way way way better deal than the previous guy on the Dyno services , so he personally will dyno and fine tune both engines with the Holley Double Pumpers. :thankyouthankyou:

by the way ,what are the specs on your engines ? i am sure many here would like to know!!

I have to say...the only thing better is Direct Injection with a very good engine management system. It's like having 2: 2 barrel carburetors. You get on plane with both...once you are up...you back off and cruise on one (primaries). When you want to stretch out you bring in the second one (secondaries) :evilb:

I dont know of any direct injected marine engines.

Port injected sure, but injector actually in the combustion chamber - I dont think so but Im wrong constantly.

Good electronic injection is beautiful for sure- Its nice boating everywhere all day without a spec of soot on the transom and part throttle fuel economy is pretty incredible.

All in and said the tradeoff is money, and when the day comes that this thing just stops running I cant really do much about it whereas the carbed mill I can work on myself and actually fix it.

I think there is something to be said for simplicity and ease of use of carbs - its a "regular guy deal" that I can work on myself vs a trip to the shop when the other breaks.

UD

Uncle Dave,

you might agree with this, Laz from Mesa B. is urging me to put oil coolers, he claims that a marine engine oil temp. would run at over 260 degrees on a constant basis and that not even sinthetic oils would stand these temperatures,so there is no option but to have an oil cooler.

I wholeheartedly agree, and mentioned it in one of my first posts. Teague, Dan Olson, have the stuff - I run an older Aeroquip in the small block boat.

If you simply cruise at part throttle you wont have an issue but you didn't build these babies to do that, and oil temp control is critical to longevity.

http://www.youtube.com/watch?v=xfbNkf2FPk0

At the end of these 2 runs my oil temp never exceeded 120 in the pan, and at least one run was wide open for several minutes.

UD

i remember you mentioned it,nice video,i guess i will have to strech a bit more $$$$

Checked the bottom today with a straight edge and it is straight as an arrow , no hook at all on this boat.

That's what I thought, but couldn't be sure, now we can see what they dyno and play the prop tuning game :evilb:

thats good news.

This puppy ought to roll pretty good when its all tuned up.

As BBC says - the mills numbers will take us to the props- and then we see whats really what.

Next stop- in the "hull" game will be seing if and how much "walk" you get and how is it is or isn't to drive through or out of.

Cant wait to see it go together.

UD

My 255 Formula has it on the outside from the chine to the first step in the hull (12") and from the transom forward about 10". From the first step to the keel (40") it's straight as a string. This area is barely in the water after the hull gets to planing speed. Based on that I don't think I have an effective hook.

[IMG]http://i705.photobucket.com/albums/w...g_edited-1.jpg[/IMG]

With my '86 272 that area was completely out of the water over 50 MPH and that's a big reason that the trim tabs become virtually useless at high speeds unless they are moved inward towards the keel ( stated by Uncle Dave). I have a real issue with this because with twins I don't have as much room to move tabs.

Where are you going to get the oil coolers from? Don't buy any merc ones unless you like being raped. Lots of companies have something that will be fine for your engine.

I will have Laz from Mesa Balancing install those he told me we need large ones,he will look into that but I don't think he uses merc,This is what he builds but out of my budget

http://www.mesabalancing.info/Produc...=Marine+Racing

Actually,

Bob Madara gave me a call yesterday, he wanted to know how everything was going, he was glad that Laz is doing the tuning.

So got a tuning date yet? This thread is one of m y favorites. I could so end being a copy cat. Lol when the time is right. I'm gonna have to check mine for a hook also.

Been doing a little looking around

The Olsens are awesome coolers but $$$$ I dont hink thats in the budget here.

Senn Dure has a tandem oil cooler available but I cant see a pict of it.

According to the price book its 588 list.maybe you get get 10 off if work the deal - if you could this would represent 264.6 a side and a pretty clean install.

Might be just the thing you'd need vs separates- but I cant seem to find it. Id give them or a dealer a call and take a look

My Ilmor has a Senne Dure Heat exchanger - These components are very nice gear.


Uncle Dave

We are shooting for this Friday, will see!!

UD,

I will ask Laz which brand and size he has in mind,let you know.

We're all on edge here waiting for an update.......


UD

Yeah. ^That.

I know a secret....but it's Diego's surprise...stay tuned.

im going to say 485 hp and 500 ft lbs tq..

Engines are being tuned right now, the secret that John was referring to is revealed by my new avatar now.
Just bought a 272 sr1 , we'll see where the new 383's go now. I will probably sell the Nova soon, need to think about all this now.