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HP Required to Produce mph??

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#41 ·
cstraub said:
Not to mention Scott you are dynoing with marine exhaust in tact and with dyno headers. So you will be able to show real world numbers. Thats what I like about your test. Don't forget you have the Morel lifters also.

It will be nice package I'm sure. Just get that puppy on the dyno!!!!
Click to expand...
Ahhh. The dyno. Yup.

Guess what? As of last night it is back on it.
Fuel problem fixed?
We'll hopefully find out in the next couple of days.

Mudball - no, no video work.
Big $$$$ ? Of course not!
This is the whole purpose of this build up.
Yes, cam and lifters are a little more $ than off the shelves but not much more.
Heads? Out of the box - good hardware - hard anodized
no porting

Anyway - cross our fingers and see what happens.

And again - if #'s are satisfactory I will post exactly what was done.
 
#42 ·
Re: Re: Re: HP Required to Produce mph??

BajaIceBreaker said:
That's very similar to what I am doing this winter as well. I have 454's punched out .030 with 9.5:1 compression. My heads are not Merlin, but they have extensive porting. I am considering the same cam (the 288 advertised duration) but with Hydraulic rollers (I don't know why you are considering solid rollers on a hydrolic roller cam) 750 carbs, Edelbrock RPM Air-Gap and either Dana's or Hardin exhaust. Except I don't want to take guesses on hp.... I don't want to be let down, so mine will hit the dyno. Keep me posted on your progress. My boat runs 62 on twin 454's with 450 hp, I am shooting for 70 mph.
Click to expand...
What I've been told and read, is that with solid rollers on a Hyd. cam you get faster valve speed on opening and closing. Don't know if it's true or not....
 
#44 ·
After reading what everyone has posted I've decided to take the plunge and go with a new short block. Picked up a new 540 Dart completely assembled for $3800, here locally. I figured what I would have spent on a 2 bolt 454 to upgrade it would have cost me more. And if I decide to get rid of the boat, I have a spare motor for the next one.
 
#46 ·
Dart 9.8" Block, Eagle forged crank and rods, SRP pistons, moly file fit rings, Clevite bearings ARP bolts, balanced & assembled. It's a short block so no cam, lifters etc. I would have bought else were but the price is good and in Nevada for the next 2 years you can write off sales tax from your Federal returns.
 
#48 · (Edited)
Yes- all new with machining. Dart Big M block 9.8 deck, Eagle 4340 Internal balance w/4.25 stroke crank, Eagle 4340 H-Beams with ARP Bolts, SRP Forged pistons, JE Plasma Moly rings, Clevite or King Pro Race bearings, balances and fully assembled. Scorpion Rockers $189.

They are also running a special on 540 World Blocks with all the same parts unassembled & no machining or balancing for $3199.
 
#53 ·
Can't answer for their machining and assembly practices but that is a good deal for those parts assembled.

Kind of makes you want to buy one, stick it in a street car, and put huge doses of nitrous in it. Huge by huge power and if you break it it is only a cheap short block.

Ooops, sorry. Reminiscing. I don't do that anymore. :winker: :winker: :winker:
 
#55 ·
Labor rates:

$130 Bore Hone
$150 Torque Plate
$85 Surface decking
$320 Short block assembly
$99 stroker clearance
$25 Cam bearing install
$100 balancing
$64 Pistons

The place is huge, they had about 25 block being prepped and built. The guy was telling me they were building motors for a boat company, don't know if it's true or not. The price I got on the motor was $2800 for parts and $1000 labor/tax.
 
#56 ·
I've never paid under $1100 or so for machining, balancing, blueprinting, etc, etc. I'd say $1500 or so is about average for me. SOme motors way above this but for different circumstances.

Then again I deal with 1 person and I know how much time he spends, how detail oriented he is, how intelligent he is, what machines he uses, etc,etc.

Anyway, for me it is worth extra dough to make sure the motor was put together 100% correctly.

But, again, for that money if you explode it who cares - was cheap money.

If it stays together it stays together.
 
#57 ·
Few things about new blocks:
Deck's are aroun.025" tall, so milling or better yet, square decking needs to be done.
Lifter bores are usually on the tight side. Need honing.
Line bore is usually out, needs line honing.

I ran the numbers on the cost of the parts, at best they are loosing $100. Maybe the company is a write off.

Keep us posted on how it goes.

Chris
 
#58 ·
Chris - don't the lifter bores on these blocks usally have to be machined for hydraulic roller lifters or am I thinking about something else?

I'm dumbfounded on this price too. I shiver when I hear about real lower dollar stuff for marine, however, I don't have an issue if throwing a low buck street terror together that doesn't see much use.
 
#59 ·
They are honing the lifter bores, and deck the block. They also mention that they mill the top of the lifter area so that the GenVI rollers can be used.

When I was at their shop they had a container full for Dart blocks that just arrived and about 100 blocks aligned by the dock, and were expecting another container of World blocks, I don't know if they are getting quantity discounts or what.

Chris
 
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