Im just courious if anyone has tried to use a 350 gm 4 bolt block. i can get the best internals i work for jegs. i just want to know if anyone knows its limit under boost. Im guessing with good parts 1000hp. but i could be off. thanks

 

https://www.theturboforums.com/smf/index.php?topic=61219.0 lots of good info about stock 350's there, also do a search with username rotoryota

 

Hey man, sounds like you are the person i need to talk to. I am trying to build a supercharged or turbocharged 350. What internals were you looking at? I was looking at scat and manley.

Thanks

 

im looking to try and make a min of 1000 hp with the stock 4 bolt block. I can get a mowtown or little m block. if that can be done safely. im just trying to use my nos block, and just convert it with different pistons. its got one race on a fresh bore hone and align hone and deck. its a 360": motor. i have a innovative dual ball t88. and front mount intercooler its going in a s10. i just want to get it done buy next season thats why i wanted to use the block i already have, save some money and get it done.

 

1k fw hp or rwhp??

 

stock caps??

 

At 900+ the caps (billet steel caps) wil begin to walk.
At 1050+ you will lucky if it doesn't pull the mains out like 302 ford @ 700+hp.


Why risk your $$,$$$$.$$ internals with $50.00 junkyard block.

 

What about a main girdle? Would that help much?

 

i dont have a junk yard block. i have a good block thats already bored and honed. and already runs in the 9s on spray. I was going to buy a mowtown or little m and go for 1200 whp. but i wanted to jsut get the motor going so i can start the pluming for the turbo headers, intercooelr and stuff. i wanted to have it done buy next season.

 

This may not be the same but a local heads up racer used a stock 350 block turbo 383 in an 80's S-10 which ran 5.25 in the 8th.He ran alky and said he finally did a full fill because wherever he filled to it would bust right above it.So whatever HP it takes to run 5.25 at 3000lb's I would say back it off a little from there.I think it would be best to burn pistons in a stock block while tuning than use a Motown.

 

No the block is just the weak link.

I would not use motor mounts above 600 hp either.
Front and rear motor plates.

 

Matt 010 castings are cheap-ish.
Sure you cam make some power.
Sure they will last a while.
If you goals are over 1k don't risk your parts.

 

We run a 010 block , stock caps, stock main bolts, stock head bolts, 882 heads, stainless 5000 series valves,
scat 4340 crank, eagle H beams, trw -22cc forged pistons.extra clearance on big ends and mains bearings.
Makes 1014 hp and 1000 ft'lbs. spent 5 days on dyno to get tune up close ( 75 pulls).....twin t3/t4 hybrids turbonetics- 57 trim - 24 psi boost--- does it easy.
MECH injection , no electrics,
Nothing wrong with components... you will only have problems when the tune up is wrong... when detination occurrs...
YES it is a time bomb, but it will stay together if rpm in under 7000rpm, and TUNE -UP in right.
STAY fat and monitor oil filter for cap walk.
Think about it!!!. turbo engines MAKE torque...load up engine and drive it like a diesel truck--- loves it..

 

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wow are you saing im gonna need a new block and build some motorplates ?? hmmm so when did you say your next visit to WA. was :LOL

 

im just going to buy a mowtown with the billet steel caps or a little m we have both in stock at work. thanks guys. i think i would be disipointed if this thing didnt make 1200 whp. ill keep you posted.

 

I also have a stock 4 bolt with stock caps ,dyoned 900hp and 1000flbs @20psi, its even got a Cast scat crank.It may not be on the safe side, but its still alive.

 

im using a sonny bryant billet crank, carillo rods and je extreme duty turbo piston. my original goal was 1400 hp to 16oo hp.

 

Little M is way to go IMHO.

 

what makes the little m better than a mowtown with billet caps? just courious

 

Years ago they were = .
These days the Dart is a better piece.
I have heard stories from other shop about Bill Mitchells stuff breaking.
You can get the Little M w/ Iron or Steel caps.

Good luck.