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Jesse Lackman
 Post subject: what breaks on the 225 ?
PostPosted: Mon Jan 14, 2002 1:41 pm 
What is most likely to break in a high hp, high rpm 225?

rvsrchjl@westriv.com
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Doctor Dodge (Doug Dutra)
PostPosted: Mon Jan 14, 2002 9:11 pm 
Quote:
: What is most likely to break in a high hp, high
: rpm 225?


That would be the oil pump drive gear.
Then, once you get to the 350 to 400 HP range, stock connecting rods start to break.
DD
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Dave M
PostPosted: Mon Jan 14, 2002 9:40 pm 
Quote:
: That would be the oil pump drive gear.
: Then, once you get to the 350 to 400 HP range,
: stock connecting rods start to break.
: DD


Don't forget about the head gaskets!

damuel@kalama.com
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Will
PostPosted: Mon Jan 14, 2002 10:40 pm 
Quote:
: What is most likely to break in a high hp, high
: rpm 225?

your wallet

slantsix@netzero.net
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r
PostPosted: Mon Jan 14, 2002 10:51 pm 
Quote:
: Don't forget about the head gaskets!

Rear axles
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Jesse Lackman
PostPosted: Tue Jan 15, 2002 12:00 pm 
Thanks. Hey I thought your wallet breaks first!?

I'm cooking up a dirt track slant (probably aluminum block) and want to know the weak points. We're looking for 350+ hp at whatever rpm that requires. The pistons might end up being custom 3.75 bore, lightweight, a lighter piston/pin should take stress off the con rod. We would like to use the 7" rod too which should help with rod stress. Maybe the 7" Jag rods I saw someone refer to would be the ticket, where could one get those? What is done about the oil pump driveshaft? We think we have the headgasket problem covered. All suggestions are appreciated.

Thanks again.

Jesse Lackman revsearch.com

rvsrchjl@westriv.com
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Doc.
PostPosted: Tue Jan 15, 2002 1:32 pm 
Quote:
: Thanks. Hey I thought your wallet breaks
: first!?
:
: I'm cooking up a dirt track slant (probably
: aluminum block) and want to know the weak
: points. We're looking for 350+ hp at
: whatever rpm that requires. The pistons
: might end up being custom 3.75 bore,
: lightweight, a lighter piston/pin should
: take stress off the con rod. We would like
: to use the 7" rod too which should help
: with rod stress. Maybe the 7" Jag rods
: I saw someone refer to would be the ticket,
: where could one get those? What is done
: about the oil pump driveshaft? We think we
: have the headgasket problem covered. All
: suggestions are appreciated.
: Thanks again.
: Jesse Lackman revsearch.com


Sounds like a fun project, keep us up-dated on your development.
What is your idea / solution on the head gasket problem the Alm. SL6 is known for?

When building the Alm. SL6, head studs and main studs would be a big advantage, especially the main studs. I have tried to get ARP to do a special run but so far, no luck. May-be it is time to try again?
DD
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Patrick Devlin
PostPosted: Tue Jan 15, 2002 1:33 pm 
While we're on the subject, what is the max safe RPM to run on a stock engine? (meaning stock oiling, stock valvetrain, etc.)

pwd22@drexel.edu
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r
PostPosted: Tue Jan 15, 2002 4:11 pm 
Quote:
: While we're on the subject, what is the max
: safe RPM to run on a stock engine? (meaning
: stock oiling, stock valvetrain, etc.)


Define safe? I don't think it will go much past 7 anyway. Sane would be 6500 doug will tell us. I know my 170 would really spin up
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Doc.
PostPosted: Tue Jan 15, 2002 5:41 pm 
Quote:
: While we're on the subject, what is the max
: safe RPM to run on a stock engine? (meaning
: stock oiling, stock valvetrain, etc.)


This sounds like the start of another good thread so you may want to start a new post on this question.

Be careful to define what you mean by "stock" seeing that the 1bbl and stock cam really limits the RPM on a "stock" SL6.
DD
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