Alpha 1 gonna snap like a twigg!!!

tmurphy1602

Cadet
Joined
Jul 4, 2011
Messages
8
Ok guys been a lil bit since i was on so here is the situation, i built a new engine for my chaparral 278 xlc, :) i used a 79 - 350 block, flat top pistons S/S Crank, double timing gears, H/P oil pump, vortec heads, yes the real ones. ARP studs Air Gap intake, with a 4bbl performer Carb, bottom end was beefed up, i just cant remember what was used, ... now the engine is in and running,,, muhahahah to all the nah Sayers.. to be honest there where a few unexpected mods.. ie marine flex plate or flywheel was a 2 part seal, and the wouldn't fit the crank s/s crank so of to the machine shop it went.... had to fabricate a throttle bracket to bolt to air gap intake, old bracket wouldn't fit on carb, also installed a manual choke... i know i know im a cement head and didn't notice the carb was a manual, not automatic.. lol just means i got a new control on my console :).. Sooo i need to know if i can in stall a msd ignition? im asking cuz not sure how they would react to the neutral cut off switch?? Also after we built the engine the debate started.. you got it HP, many at the local marina are saying my alpha will melt or just implode with that kinda power, estimates range 375-450? i dunno but its more than the stock M/C-260.., so should i go to a bravo drive? any input would be great guys thanks
 

tmurphy1602

Cadet
Joined
Jul 4, 2011
Messages
8
Re: Alpha 1 gonna snap like a twigg!!!

yeah i have heard that number befor, 500-600 hp, would be peace of mind for sure just not liking the price tag.. :( lol
 

Scott Danforth

Grumpy Vintage Moderator still playing with boats
Staff member
Joined
Jul 23, 2011
Messages
50,430
Re: Alpha 1 gonna snap like a twigg!!!

many people run high hp thru an alpha, both on here and on Screamandfly. many 383's putting out close to 450hp. just be careful on the hole shot.

to get 375-400hp with the setup you describe, you have to run a cam that will require thru-hull exhaust.

why not just install a auto choke kit? is your carb a marine unit?
 

cr2k

Captain
Joined
Mar 19, 2009
Messages
3,730
Re: Alpha 1 gonna snap like a twigg!!!

If your engine is covered make sure you run MARINE electronics, electricals and fuel stuff.
 
Joined
Apr 27, 2012
Messages
62
Re: Alpha 1 gonna snap like a twigg!!!

Vortec Heads + Flattop pistons, You going to be pushing some pretty high compresion
 

TilliamWe

Banned
Joined
Dec 21, 2004
Messages
6,579
Re: Alpha 1 gonna snap like a twigg!!!

just run the Alpha til you break it, then you'll know what it will handle.

What are your cam specs?
 
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