575sci Head service
11-30-2009, 06:06 AM
#31
Charter Member
Charter Member
Brad Smith Power in Joplin MO did the rebuild.
The only thing reused was the block and crank.
Punched out to 510, Alum heads. full roller,
On the dyno it was at 715 or so w 700+ ft lbs tq.
that was w smaller pully and REAl gas.
I had him back it down to stock pully and all I can get in OK is 91 so that is where he set it at.
I am VERY happy w the build.
The only thing reused was the block and crank.
Punched out to 510, Alum heads. full roller,
On the dyno it was at 715 or so w 700+ ft lbs tq.
that was w smaller pully and REAl gas.
I had him back it down to stock pully and all I can get in OK is 91 so that is where he set it at.
I am VERY happy w the build.
Thanks for the info.
Another Q? What has been everybody's experince with the CMI headers that come on the 575's? Do you have to have them pressure tested every year, and has there been problems with them? I hope they aren't like the 525 CMI headers?
Thanks,
Dean
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Everything is for sale @ a certain $$
Everything is for sale @ a certain $$
11-30-2009, 07:45 AM
#32
One of mine was leaking when I got the boat, Performance Boat brokers said they fixed. Hmmm
One was leaking when rebuild so I ordered NEW one then.
But boat had 400+ hrs when it blew up.
Suppose to of had new top end but I dont think so.
So I quess the answer is YES I am going to pressure test every year.
One was leaking when rebuild so I ordered NEW one then.
But boat had 400+ hrs when it blew up.
Suppose to of had new top end but I dont think so.
So I quess the answer is YES I am going to pressure test every year.
12-01-2009, 05:30 AM
#33
Charter Member
Charter Member
One of mine was leaking when I got the boat, Performance Boat brokers said they fixed. Hmmm
One was leaking when rebuild so I ordered NEW one then.
But boat had 400+ hrs when it blew up.
Suppose to of had new top end but I dont think so.
So I quess the answer is YES I am going to pressure test every year.
One was leaking when rebuild so I ordered NEW one then.
But boat had 400+ hrs when it blew up.
Suppose to of had new top end but I dont think so.
So I quess the answer is YES I am going to pressure test every year.
Thanks for your input. Seems like pain in the A$$ to have to leak check those CMI's every year!
Has anyone else had the same problems? I think I might just replace ones I have, (IF I buy the boat!) with some Eickert headers.
Dean
__________________
Everything is for sale @ a certain $$
Everything is for sale @ a certain $$
12-01-2009, 08:32 AM
#35
Geronimo36
Gold Member
12-02-2009, 06:08 AM
#37
Registered
Mine have had no issues, freshwater only, have just over 200 hrs. now.
Have had excellent performance from mine, strong runners.
12-02-2009, 08:02 AM
#38
Charter Member
Charter Member
That's good to hear, the 575's I'm looking @ are 2001's with ~ 388 hrs, and they have been run in saltwater. I just want peace of mind that I don't have to leak check them every year.
Dean
__________________
Everything is for sale @ a certain $$
Everything is for sale @ a certain $$
12-02-2009, 09:12 AM
#39
VIP Member
VIP Member
usage, is the intake manifolds corroding.
Vinny had problems with this.
12-02-2009, 09:20 AM
#40
Charter Member
Charter Member
Now that you mention it, I think I remember hearing something about the intakes having that problem also. What did Vinny do, replace them with same OEM intakes or something else?
Thanks,
Dean
__________________
Everything is for sale @ a certain $$
Everything is for sale @ a certain $$
