Anyy comments on the Scat 9000 350 main stroker crankshaft with 2 peice rear seal? - Hot Rod Forum : Hotrodders Bulletin Board
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Old 09-18-2006, 07:50 PM
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Anyy comments on the Scat 9000 350 main stroker crankshaft with 2 peice rear seal?

i`m in the midst of building a 350 and i found on the net. the two cranks were about 170 bucks a piece.These are new crankshafts ready to install
out of the box. anyone use these cranks before?, and did you have any luck?. OR where could i get any feedback info. on the cranks.



i wanna either rebuild it as a decent 383 or a 355. dunno kinda evened out the odds on the prices. about the same. but it`s for my pickup truck as a daily driver. if it helps any the transmission is a munice 4 speed 2.54 first , 3.08 rear with 31x11.50 inch tires on 10 inch rims. make about a 29 inch tire.

The build i`m planning on putting together is as follows:

quadrajet , edelbrock performer manifold , 78 cc heads 1.94,1.50 valves , 214-224 .443- .465 lift camshaft 112 lobe sep. flat top 4 valve relief or 2 valve relief pistons . borg and beck pressure plate 11inch double spring clutch. 12 bolt truck rear end. in a 1974 stepside c-10 originally equipped with inline 6 cylinder. i may equip the front end with 454 front springs.

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Old 09-18-2006, 07:56 PM
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Ready to install how do they know what the weight of your rods and pistons are ETC. to balance it properly.

We balanced an Eagle crank for a customer that was ready to install and we checked and it was out just over 50 grams front to rear plus what we had to take out and he caled Eagle and they said aleast it wasn't out a 100 grams (wrong aswer)
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Old 09-18-2006, 08:16 PM
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oil pan on stroker 350

do i have to use a special oil pan for this project. maybe the moroso deep sump 7 quart oil pan?


Another question on the crank. says ready to install out of the box should i beleive that and but standard size main bearings and standard side rod bearings with 5.7 rods and the pistons for the 3.75 stroke with 5.7 rods for a 350 .030 overbore size. bore the blockw deck plates. should i use a stone honer or a bottle brissle bead type?. ALine hone camshaft mains install bearings. IS it a good idea to just install new intake valves without changing guides? The old ones have no margin, they`d prolly chop a skewer stick clean. New .500 max lift springs, head was already equipped with them but gonna change them for luck sake.

Clould i still use the six cylinder internal balance flywheel? or does it have to be a 400 flywheel? What`s the difference? bolt circle diamater.?
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Old 09-18-2006, 08:23 PM
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Here`s the link

http://www.rpmmachine.com/scat-crank...lacement.shtml

stock external balance , maybe it`s a flick of an advertisement? maybe a scam.
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Old 09-18-2006, 08:32 PM
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not a bad price in ,my book.

for 179 a stroker crank and a set of cast or hypereutectic coated skirt pistons for about 180 or so with the rebuild kit isn`t all that bad.totaling to about 500 bucks in parts for the motor, not including machine work that is. that`s why i was thinking of just changing to valves to use the heads and just regrind the seats then lap them in.
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Old 09-19-2006, 05:46 AM
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crank

I have used several of the 9000 series scat cranks...

I can tell you they are "not" ready to install out of the box......The scat cranks have been good on the main and rod sizes but the balance needs to be checked. They are balanced to a target bob weight and they are not really close to that, so even if you could some how get the target bob weight it still would not be right...

You need to check the crank for size, also check the balancer mounting diameter of the crank, then you need to have it balanced to your bob weight...

They hold up very well and take a bunch of abuse, so there is not a issue there.


Keith
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Old 09-19-2006, 06:11 AM
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DITTO: Sold many, used a few myself. A good buy. Better quality than the CAT cranks. Not underground and over polished and have better cheeks and fillets. Front crank pin arm is stronger. They MUST be balanced to your combination. I sold one to a customer who decided he didn't want to spend the $150 for a balance job. It'll shake you out at about 4600.
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Old 09-19-2006, 02:21 PM
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I have the SCAT 9000 crank for a 383 with 6.0 rods. This is an internally balanced crank, so I wanted to be certain to have light enough parts to not need any mallory metal when balancing. Sooooo.... . . . . . I worked hard toward that goal and have a bob weight of 1668 grams. My machinist says he took 1.5 pounds (that's right) out of the crank before he had it right.

Ya needs to balance 'em.

Pat
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Old 09-20-2006, 05:31 PM
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BOB weight??

when balancing a crank. the bob weight signifies what? rod piston + pin? should i look for lightweight series flat top 2 vr from Federal MOGUL? CR. w 76 cc heads. 8.5

i`m using stock 882 casting. 1.94. 1.50. valves. i`m having them gasket matched and a lil light bowl work.

Can anyone help me with this i have these 882 heads the valve guides are good but the valves have no margin. Could i just install new valves cut the seats and lap them? would that work. or is i definite have to, to change the valve guides?

this Build is just gonna be an extreme power upgrade from a 250 six cylinder. just a daily driver. and some fun kicking a honda or too. not all of em though. those things ell run if they`re right.But even the old 250 will give em hell.

Last edited by 74chevyflat; 09-20-2006 at 05:34 PM. Reason: spelling of the word "build"
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