Ls1 upgrade questions
09-15-2012, 08:07 AM
#42
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Originally Posted by bor
I build a ls 2 into marine version ,got a new l 76 truck engine from the newer trucks which is a ls2 block whit ls 3 heads on it and a high truck intake ,making 360 hp
We stroked that whit a compstar kit to 408 and upgraded the valve train ,timing gear and put in a bigger cam and a ls2 intake to get it fit under the engine hatch and maked it dry sump whit ls 7 oil sytem ,cooling sytem I used from pcm .
The headers I dyno whit where cmi s but there high and didn t like the collector so switched to a set lightning .
It make s 560 hp @6100 rpm and max tq is 550 ft lbs @4700
and tq is real flat from 3000 -6300 rpm above 500 ft/lbs
know have 20 hrs of use and like it every time if I go out ,this engine push real good and screams for more !
here are some video s !
http://www.youtube.com/user/phantomlspower?feature=mhee
enjoy .so far 96 mph but still testing props and spacers .
I build a ls 2 into marine version ,got a new l 76 truck engine from the newer trucks which is a ls2 block whit ls 3 heads on it and a high truck intake ,making 360 hp
We stroked that whit a compstar kit to 408 and upgraded the valve train ,timing gear and put in a bigger cam and a ls2 intake to get it fit under the engine hatch and maked it dry sump whit ls 7 oil sytem ,cooling sytem I used from pcm .
The headers I dyno whit where cmi s but there high and didn t like the collector so switched to a set lightning .
It make s 560 hp @6100 rpm and max tq is 550 ft lbs @4700
and tq is real flat from 3000 -6300 rpm above 500 ft/lbs
know have 20 hrs of use and like it every time if I go out ,this engine push real good and screams for more !
here are some video s !
http://www.youtube.com/user/phantomlspower?feature=mhee
enjoy .so far 96 mph but still testing props and spacers .
Holy chine walk batman !!
http://www.youtube.com/watch?v=3eSMSJrJ3bk&feature=plcp
@ about 1:52
09-15-2012, 12:38 PM
#43
Now have a -3" imco sc drive on it and handles like a dream !
Also on one video it go s complete on one side (rub rail hits the water ) due to going of the throttle before trim it back first .
The cam specs I don t no have to ask the builder .
09-16-2012, 03:26 AM
#45
My hull doesn t provide natural bow lift so it was a gamble if it worked ,however it run 95 mph whit the blackhawk but we had 24% slip .
Another downside is that it goes very fast on idle and also my engine idles at 900 rpm and the blackhawk don t like to get both props moving at that rpm it gives a very loud bang !
So I decided to try a imco which also gives a lot beter prop selection ,I would loved to try a set 31 props on the BH but there very rare and espacialy here in europe .
going out today whit a 1" spacer on the imco to look if I can get the hull a little more out of the water and gain some speed .
Another downside is that it goes very fast on idle and also my engine idles at 900 rpm and the blackhawk don t like to get both props moving at that rpm it gives a very loud bang !
So I decided to try a imco which also gives a lot beter prop selection ,I would loved to try a set 31 props on the BH but there very rare and espacialy here in europe .
going out today whit a 1" spacer on the imco to look if I can get the hull a little more out of the water and gain some speed .
