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-   -   PSI 8.8 liter / 550ci ??? (https://www.offshoreonly.com/forums/general-q/377494-psi-8-8-liter-550ci.html)

Dragracer_Art 11-01-2022 01:11 PM


Originally Posted by Cerberus66 (Post 4850197)
the picks you show should have Kellogg Heat induction forged cranks. Scat manufactured prostock rods. Some also have forged pistons. Dished pistons are 9.1 Flat tops are 10.1. All the rods are bushed.

Wowzers... sounds like a great starting point.

Thanks a million for the info !!!

Dragracer_Art 11-01-2022 05:06 PM


Originally Posted by Cerberus66 (Post 4850196)
The block casting number is 80000795R

PSI made three different valley pans, three different intakes th elates of which has orings around the ports.
ALL the LS Style heads have injector in head

Where does PSI put the block/casting number ?
I asked the seller and he is as clueless as I am.

Cerberus66 11-01-2022 06:21 PM


Originally Posted by Dragracer_Art (Post 4850228)
Where does PSI put the block/casting number ?
I asked the seller and he is as clueless as I am.

Passenger side rear on block

Cerberus66 11-01-2022 06:22 PM

https://cimg9.ibsrv.net/gimg/www.off...ee1521882.jpeg

Dragracer_Art 11-01-2022 07:11 PM


Originally Posted by Cerberus66 (Post 4850239)

Thanks !

Dragracer_Art 11-03-2022 11:31 AM

Seller did confirm that he has two of the 80000795R longblocks available... so I just purchased both @ $1500ea + $225 shipping.

Hopefully I can build one good one out of the pair... assuming they have good parts inside them and have the better LS style heads.

Dragracer_Art 11-03-2022 12:19 PM


Originally Posted by Cerberus66 (Post 4850196)
The block casting number is 80000795R

PSI made three different valley pans, three different intakes the latest of which has o-rings around the ports.
ALL the LS Style heads have injector in head

Assuming both these engines I just bought have the LS style heads on them... are they substantially better than the stock cathedral port heads currently on my 8.1 ?
If I can get away with using these LS heads and intake instead of buying the aluminum Raylar heads... that will save a bunch of money also.

I'm not looking to spin this thing to 7k... I think 5500-5600 is plenty. I can prop the boat accordingly so I dont need to spin it any faster.

Maybe a fresh rebuild with the right camshaft will work... AND save some money.

hogie roll 11-03-2022 02:03 PM

What do these LS style heads flow and how do you identify them? Valve size? I assume they are cast iron?

Dragracer_Art 11-03-2022 02:09 PM


Originally Posted by hogie roll (Post 4850441)
What do these LS style heads flow and how do you identify them? Valve size? I assume they are cast iron?

From what I understand... all the LS style heads have the injector bosses integral with the head... and yes they are cast iron.

I cant speak to the valve sizes or flow numbers but would really like to know also.
If they are significantly better than the 8.1 cathedral port heads, I will give them a try.
I might get away with just dropping a bigger camshaft in a fresh PSI longblock if these heads are a viable option.

Dragracer_Art 11-03-2022 02:45 PM

8 Attachment(s)
Seller just sent me a couple pics to confirm what I bought.

Looks like both are definitely the correct 80000795R blocks.


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