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-   -   IMMCO OUTDRIVES??? Fastech 353 (https://www.offshoreonly.com/forums/formula/349685-immco-outdrives-fastech-353-a.html)

tjcheney 09-09-2017 10:11 AM

IMMCO OUTDRIVES??? Fastech 353
 
Has anybody installed IMMCO Drives on a 353 Fastech.?? How about Shorty's without boxes...?? How did they perform..?? Thanks

axapowell 09-21-2017 07:54 AM

Don't bother without boxes, and the IMCO lowers have a shorter skeg than the Sportmasters which will effect the handling / steering.

Boxes with a -2 Sportmaster is the set-up if you are running over 80, otherwise, save your money for gas.

Dave

causin trouble 09-27-2017 06:42 PM

running 92 mph all day long 2001 353 fastech with procharged Gellner Engineering 496 ho
I am running Imco 2" shorties with Hydramotive P5X 28 pitch props

when putting performance drives on you need to make sure you know what your x dimension is of your drives

I was able to contact Formula and get the proper x-dimension on my boat it was 17.5"
When a boat is originally set up the rigger has to determine where the engine and drive are going to be mounted on the transom. The rigger must take several measurements on the transom to determine how high he wants the engine and drive to be mounted. this measurement is called the x dimension. The beauty of modern tech (shorties) is that one can in theory raise the "x" without having to move the entire engine and drive package. Putting on a shorty does not truly raise the "x" only the propshaft.

VoodooRob 09-27-2017 10:35 PM


Originally Posted by axapowell (Post 4583620)
Don't bother without boxes, and the IMCO lowers have a shorter skeg than the Sportmasters which will effect the handling / steering.

Boxes with a -2 Sportmaster is the set-up if you are running over 80, otherwise, save your money for gas.

Dave

Agree, 353s run great with boxes vs without. ITS really works well on that boat.

racinfast002 09-28-2017 06:34 AM

I will say on my 312 I always felt like it was dragging the drives. I felt like boxes and -2 would have put it close to tickling triple digits.

RGPIII 09-28-2017 07:43 AM


Originally Posted by causin trouble (Post 4584867)
running 92 mph all day long 2001 353 fastech with procharged Gellner Engineering 496 ho
I am running Imco 2" shorties with Hydramotive P5X 28 pitch props

when putting performance drives on you need to make sure you know what your x dimension is of your drives

I was able to contact Formula and get the proper x-dimension on my boat it was 17.5"
When a boat is originally set up the rigger has to determine where the engine and drive are going to be mounted on the transom. The rigger must take several measurements on the transom to determine how high he wants the engine and drive to be mounted. this measurement is called the x dimension. The beauty of modern tech (shorties) is that one can in theory raise the "x" without having to move the entire engine and drive package. Putting on a shorty does not truly raise the "x" only the propshaft.


Ok i'm going to bite. Procharged 496 HO's? whats been done to the bottom ends? I love the reliability of my boat with 496's but top speed of 73 gets boring.

afratki 09-29-2017 07:57 AM

Already Rob? :D

RGPIII 09-29-2017 11:22 AM


Originally Posted by afratki (Post 4585274)
Already Rob? :D

:whistle:
hahaha maybe???

causin trouble 09-29-2017 03:11 PM

Installed J&E custom made pistons , floating wrist pins and rings,retainers all new bearings,
used stock rods and crank (was steel already) Balanced and blue printed bottom end.custom valve train components: Arp screw in studs in the heads, Crane roller rockers, Isky Valve springs , Bronze guides Inconel exhaust valves Manley Intake Valves Manley push rods, Crower Double Roller timing chain , upgraded oiling ports and oil pump and spring etc etc

Thunderous 09-29-2017 03:48 PM

How many RPMs are you spinning to get 92mph?


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