53 replies to this topic

[BPM]

Ok guys I thought I would try something a little new for QSS
below is an engine that we have been working on lately, appologies on the pic quality but I took them on my ph

It will be dyno'd very soon, so if you want to take a guess at wot you think it will make....FIRE AWAY

Engine is a Small Block Chev built for a ski boat

Callies MAGNUM 3.875" Stroke / MOTOWN Block 4.155" Bore
CP 11.55:1 gas ported dish pistons
LUNATI 6.125" Pro Billet rods
15° DART 260cc cylinder heads, which we managed to get to flow 374cfm , 2.88"avg CSA
BRINKS PERFORMANCE custom solid roller camshaft 259/266@.050" .733"/.680"lift
ISKY REDZONE endur -x lifters & rev kit
JESEL belt drive & ATI super damper
T&D 1.7 / 1.6 ratio rockers
OLSON sheet metal dry sump
PETERSON 5 STAGE dry sump pump
MCH Sheet metal
BIGS 2 x 750HP custom curve carbs
MSD 90° drive dissy

Edited by BPM, 14 January 2010 - 09:11 PM.

[BPM]

[Falconxf88]

No idea. Ill guess just over 650-700hp at the flywheel.

[czy383]

i,m gunna say 710

[Jason Broadhurst]

Engine analyser is a nice program for working this stuff out. I use it for theoretical tunes and VE maps for tuning.

[MorganV8]

i'll go 770-850

[fat64]

Should go close to 800 @ about 8K rpm?

Although the head flow doesn,t sound all that high. I would have thought it would need to be 400 plus cfm to really get some big hp.

[hirpm boostjunky]

What fuels it goin to be running? if something like pump98 i'm goin to guess it'll only make about 600-630, if something along the lines of C16 i'd go with 750-775

[xdclevo]

781hp

[DUS12]

not much at all. no turbo hahahaha

[BPM]

It will be DYNO'D & RACED on BP 98

See if you guys can keep yur guess to a single HP figure,

its easy to say it will make somewhere between 600 & 800, thats not the objective here.

Brinks

[BPM]

fat64, on 15 January 2010 - 02:34 AM, said:

Should go close to 800 @ about 8K rpm?

Although the head flow doesn,t sound all that high. I would have thought it would need to be 400 plus cfm to really get some big hp.

thats a pretty stout head for a std config SBC, there is only a cuple castings just capable of moving 400cfm.

HINT : we have made 780hp with 358cfm on a previous build with a single carb

Brinks

[Falconxf88]

Ill say 694 then.

Edited by Falconxf88, 15 January 2010 - 12:56 PM.

[The Don]

ill go with around high 800hp to 917hp

[The Don]

depends on how much you want to push its limits brinks

[Romeo]

I say it'll make 'enough' for a ski boat. High peak horsepower isnt the objective of a boat engine build anyway right?
You want the torque to pull weight out of the water

[DUS12]

since im the one skiing behind this boat i will say 680, but you gotta remember its just a dirtl old chev

[sinister]

820hp

[BPM]

Romeo, on 15 January 2010 - 11:55 AM, said:

I say it'll make 'enough' for a ski boat. High peak horsepower isnt the objective of a boat engine build anyway right?
You want the torque to pull weight out of the water

Exactly, we will be more interested in the torque curve, on this engine, however it will need to make good avg power & be able to hang-on after peak HP



There are some pretty good guess's, certainly in the ball park.
keep em coming

Brinks

[BPM]

DUS12, on 15 January 2010 - 01:50 PM, said:

since im the one skiing behind this boat i will say 680, but you gotta remember its just a dirtl old chev

I heard a whisper the other day that my customer actually thought about fitting a TURBO 6 FURD, but he didnt have enough money, & this was a way cheaper way to go