1471 blown pump gas 548... - Chevelle Tech
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post #1 of 12 (permalink) Old Nov 4th, 16, 8:37 PM Thread Starter
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Scott Foxwell
 
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1471 blown pump gas 548...

Yes, it's a marine build but blower motors are always entertaining...

548ci, 4.53 bore x 4.25 stroke
Dart Sportsman Gen6 block
Scat standard weight crank, Scat 6.385 rods
JE dished blower pistons, 8.5:1 cr
Romac blower balancer
Canfield 355 heads (the last pair ever made) with CNC chamber and ported with Ferrea Competition intakes and SuperAlloy exhaust, Isky RAD Tool Room springs and Ti retainers.
T&D shaft rockers, rockers shot peened with spring oilers for endurance.
Straub custom solid roller, GS ultra Pro lifters and Smith Brothers 7/16 x .120 wall single taper pushrods.
Intake is from the Blower Shop and is ported to match the heads and a Superchiller that got o-ring'd on both sides.
Littlefield 1471 blower for pump gas and a pair of 1150 Holleys prepped by AED with their Teflon coating for the marine environment.
Pan is a big Stef's full sump, full kick out with a detailed Melling HV pump. Block also was set up with piston oilers from BLP.
Crank trigger is from Aerospace Eng. because they were the only ones I could find with a flying magnet wheel with the 6 bolt blower pattern.
Blower is 9% overdriven and showed 10.5# of boost and we ran 32* timing.
Best power today was 1147 @ 7000 still climbing and 989 lbs/ft @ 5000 on 93 oct BP premium pump gas.





Youtube vid of the last pull:


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post #2 of 12 (permalink) Old Nov 4th, 16, 9:04 PM
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Jon
 
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Re: 1471 blown pump gas 548...

Very nice, Scott.
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post #3 of 12 (permalink) Old Nov 4th, 16, 9:19 PM
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Bill
 
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Re: 1471 blown pump gas 548...

Great job Scott cant imagine that power in a 19' flatbottom I'm liking those black valve covers Hmm

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post #4 of 12 (permalink) Old Nov 4th, 16, 9:34 PM
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MARK
 
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Re: 1471 blown pump gas 548...

Nice work!

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post #5 of 12 (permalink) Old Nov 4th, 16, 10:13 PM
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Dan
 
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Re: 1471 blown pump gas 548...

Gonna be one badass Boat.

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post #6 of 12 (permalink) Old Nov 4th, 16, 11:56 PM
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JIM
 
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Re: 1471 blown pump gas 548...

Boost is neat stuff!! Cool build.....I've ridden in a blown 500" boat once....more like a religious experience!!


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post #7 of 12 (permalink) Old Nov 5th, 16, 1:35 AM
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Mike
 
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Re: 1471 blown pump gas 548...

That's going to be fun
Very nice Scott, great looking engine too

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post #8 of 12 (permalink) Old Nov 5th, 16, 8:07 AM
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Chris
 
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Re: 1471 blown pump gas 548...

Scott ,that's an awesome build!
Is that an intercooler under the blower?

73 nova,3515#(all steel)Pump gas!(91octane)406ci N/A, best 1/4,1.45 '60,[email protected],10.6 @ 122.38, short shifting,NO tuning!


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post #9 of 12 (permalink) Old Nov 5th, 16, 10:47 AM Thread Starter
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Scott Foxwell
 
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Re: 1471 blown pump gas 548...

Thanks guys. This is definitely going to be the tail wagging the dog in the boat it's going in. Should be fun.

Quote:
Originally Posted by WHT/73 View Post
Scott ,that's an awesome build!
Is that an intercooler under the blower?
Yes, this is pretty much a "marine only" deal since to be any kind of efficient, the intercooler needs constant cold water but it can be worth as much as 100hp.

Quote:
Originally Posted by EZ Nova View Post
Scott that's nice. MAN WHAT AN INTERCOOLER!!! That suckers big! I was looking at supercooler for something like this.

Keep us posted please. I would me inclind to move in this direction for a Pre STREET style car. I was considering this when I did my Fulton 706 for my streetcar. Just couldn't beat the price and turning on 4 stages has it beneits too.

Congrads, John
Thanks John. There are smaller (thinner) intercoolers that use much more efficient alloys for the heat exchanger but they're really pricy. This one uses an aluminum heat exchanger and is about $1600.00. Not really practical for a street car since they need continually circulated cold water. I don't really like the added height but it really doesn't matter in a boat. This engine without the intercooler would probably be about 1050 hp.

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Last edited by steelcomp; Nov 5th, 16 at 11:21 AM.
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post #10 of 12 (permalink) Old Nov 5th, 16, 11:05 AM
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Re: 1471 blown pump gas 548...

Scott do you have any idea what one of those 4" spacers (non-intercooler) would do to the power band on a street car? I'm in the planning stages of a 671 blown SBC for a gasser project. I want the height on the blower but concerned about killing the driveability. Thanks for any feedback.

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post #11 of 12 (permalink) Old Nov 5th, 16, 11:51 AM Thread Starter
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Scott Foxwell
 
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Re: 1471 blown pump gas 548...

Quote:
Originally Posted by Alan F View Post
Scott do you have any idea what one of those 4" spacers (non-intercooler) would do to the power band on a street car? I'm in the planning stages of a 671 blown SBC for a gasser project. I want the height on the blower but concerned about killing the driveability. Thanks for any feedback.
I don't see how the spacer should effect drivability.
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post #12 of 12 (permalink) Old Nov 5th, 16, 12:10 PM
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Re: 1471 blown pump gas 548...

Quote:
Originally Posted by EZ Nova View Post
Wondering why you would put the hight there WITHOUT the intercooler, but worried about drivablility? If your putting the hight for it, look around at places like:

frozenboost.com

They make some inexpensive stuff that would do both and keep your driveablility up as well. I think you could do a complete blower cooling system for about a grand. More power and better drivability.
Thanks for the info. I'll look in to it. However it's just a street car that's being built to look like a giant toy to entertain kids at car shows. Doubtful it will ever see the track under my ownership.

Sorry to all for interrupting Scotts bad A build which I admire too!

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