prochargers and boost
09-16-2013 | 04:32 PM
#16
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From: Between A Womans Leggs in IL
IF a Prochargerd marine motor has EFI, afr's verified/tuned on water at wot, aluminum heads and compression close to or around 8-1 along with 75-80 MAX degree lake water for innercooler 12-13 lbs is easily reliable, I have ran that kinda boost for quite a while and haven't hurt a motor yet, Smitty
Last edited by FIXX; 09-16-2013 at 05:27 PM.
09-16-2013 | 05:20 PM
#17
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From: yorkville,il
[QUOTE=GPM;3996850][QUOTE=mike tkach; 1200 when dyno,d on a 40 ded day 1170 last month 93 deg 90 % humidity 11.6 afr.
Not bad, what heads and cam ?[/QUOTE]
heads are dart 355 cnc cam is hyd roller,i cant remember the specs on duration,lift is around .650,the cams are not off the shelf peices.the hp numbers i posted were at 6000 rpm,as we took it to 7000 numbers went up but im proping for 6000 to 6200 rpm so 7000 rpm numbers dont matter.
Not bad, what heads and cam ?[/QUOTE]
heads are dart 355 cnc cam is hyd roller,i cant remember the specs on duration,lift is around .650,the cams are not off the shelf peices.the hp numbers i posted were at 6000 rpm,as we took it to 7000 numbers went up but im proping for 6000 to 6200 rpm so 7000 rpm numbers dont matter.
09-16-2013 | 06:39 PM
#19
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Joined: Jun 2013
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From: Alto, Michigan
I have a 31 SonicSS 1990 I know its older but its fun..468 cu,Chevys.I have the smallest M1SCs they make 9 psi of boost and on the dyno about 700 hp at 5700 RPM..Also single plane intake and Merlin Square port heads,With full roller cam and roller lifters..You will also want heavy duty connecting rods..These work well for this boat you could not possibly put anything bigger under the hatch because of space..
