BLACK SHEEP

[Diesile]

Anyone read that article in Diesel Power?

Stroked cummins w/21:1 comp. and 80psi boost=891hp.

Somebody figured out how to combine high comp and boost!!

 

[itsacrazyasian]

its one thing to make that once, another to be able to daily drive. Back in the day when i owned a cummins, i ran the stock HG with arp's. I blew the head gasket the first time i found out that the guy who built my motor didn;t torque the studs correctly. I replaced the head gasket retorqued and retorqued again once i got a couple of heat cycles in. That motor ran 70-80psi with no issues. I see alot of hot rod cummins owners getting fire rings but i don't like them in a daily driver. they expand at different rates then the other material in the engine.

 

[dyoung14]

So far im running around 20 psi daily on a idi with stock headbolts and new gaskets, my compression is 20.7:1

 

[itsacrazyasian]

also forgot to mention the really stout bottom end of the cummins.

 

[dyoung14]

IDI's are really strong in the bottom end too

 

[86F2506.9]

i thought someone said the IDIs dont have strong bottom ends

 

[dyoung14]

i thought someone said the IDIs dont have strong bottom ends

Whoever said that lied

 

[FordGuy100]

The cummins in my garage only has 2 bolt mains. ***!

 

[itsacrazyasian]

i thought someone said the IDIs dont have strong bottom ends

No the IDI has a good bottom end. Its not usually a problem when under designed stress loads.

Check this out

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ford 7.3 IDI and IDIT rods.

Lot of rotating mass for the cummins though.

 

[86F2506.9]

well what boost do you think we could push cause my buddys common rail might be gettin a bigger turbo so were planin on putin it on the 6.9 dont worry were lookin into designing a set up already planin we want to see what the ole 6.9 will take

 

[88beast]

well i figure 30 lbs is obtainable with overtorqued head studs but have not got to testing
the twin compound i had planned would be 30-60 the point just below failure
but the issue was how far could it go
that 1200 hp idi was a beast running a ton of boost but the block was like jello

 

[88beast]

well i figure 30 lbs is obtainable with overtorqued head studs but have not got to testing
the twin compound i had planned would be 30-60 the point just below failure
but the issue was how far could it go
that 1200 hp idi was a beast running a ton of boost but the block was like jello

 

[itsacrazyasian]

well what boost do you think we could push cause my buddys common rail might be gettin a bigger turbo so were planin on putin it on the 6.9 dont worry were lookin into designing a set up already planin we want to see what the ole 6.9 will take

my buddy has an 03 that we were running 50, compound turbo with stock gasket/bolts. No issues for 2 years running at that pressure. Introduced spray and bye bye.

 

[pennsylvaniabo]

It would be sweet to run a psd charger.....it would seem that if you can keep the block together, and get enough cold air, and enough fuel that you could build some serious power with these blocks...

 

[dyoung14]

well what boost do you think we could push cause my buddys common rail might be gettin a bigger turbo so were planin on putin it on the 6.9 dont worry were lookin into designing a set up already planin we want to see what the ole 6.9 will take

on a stock engine who knows, i can tell you there has been people that has blowed the headgaskets at 10psi,

Now that being said i have ran over 10psi since the day i put my turbo on, i didnt hook the wastegate up when i put it on i immediatly unhooked it and later wired it shhut so the drive pressure wouldnt open the wastegate,

I guess for around a month now i have been running close to 20psi daily it reall fun to be rolling along about 2300rpm and 6psi of boost, and just floor it and watch the boost jump to 13psi and then steadily climb and getting layed back in the seat is awesome, but i know at anytime i could blow the headgaskets, or the valley pan gaskets, but it sure is fun while its lasting