High RPM survival questions - Off-Road Forums & Discussion Groups
Jeep-Short Wheelbase All discussion of short wheelbase Jeeps: CJ, TJ, YJ and JK

 
LinkBack Thread Tools Display Modes
post #1 of (permalink) Old 08-20-2000, 08:28 PM
**DONOTDELETE**
Guest
 
Posts: n/a
High RPM survival questions

1st off, this is not going into a jeep. My buddy and i are starting to build a 358? it's a 400 block, with a 327 crank. It is most likely going to be running around 12.5 to 13:1 compression, and i was wondering, what tips do you have to help this mill survive longer at around 10k rpm.

So far we were thinking:
Long Rods, strong rods
Light Pistons
BALANCE job, very precise
No cheap component

It is an aftermarket forged crank, and an untouched (0 over, and clean) block

Thanks for any advice

BJ

PS this motor is going into a Tube framed porsche 914, this should be fun!!

See you on the pilf side
Sponsored Links
Advertisement
 
post #2 of (permalink) Old 08-20-2000, 09:00 PM
**DONOTDELETE**
Guest
 
Posts: n/a
Re: High RPM survival questions

You probably have already,but if not,read my post a few days back called "why not a chev 400" there is some great info there from the likes of teamrush cjdave and others.

jsjps
post #3 of (permalink) Old 08-20-2000, 10:25 PM
 
Join Date: Sep 1999
Posts: 5,383
Thanks: 0
Thanked 1 Time in 1 Post
 
Re: High RPM survival questions

*My buddy and i are starting to build a 358? it's a 400 block, with a 327 crank.*

99.95% of all 327 crank shafts are cast iron, and about 80% of them are small journal.
--------------------------------

*It is most likely going to be running around 12.5 to 13:1 compression, and i was wondering, what tips do you have to help this mill survive longer at around 10k rpm.*

PRAY!!!.
12.5:1 to 13.0:1 compression will not run on pump gas unless you de-tune the crap out of it.
This engine will probably not reach 10K under any kind of load, and it certainly won't live at 10K.
---------------------------------

*So far we were thinking:*

No, you are dreaming.... But that's not a bad thing...
I first dreamed of 10K engines, and it only took me 15 years to learn to keep one alive at 10K.
---------------------------------

*Long Rods, strong rods*

You will have to do lightened rods, like trick steel or aluminum to reach 10K.
Crower, Childs & Alberts, Crane ect. will be able to help you.
(and they will help educate you if you listen to them)
---------------------------------

*Light Pistons*

Mahel, Cosworth, ect. will help with educating you on ultra light, high RPM piston dynamics.
---------------------------------

*BALANCE job, very precise*

THIS GOES WITHOUT SAYING....
---------------------------------

*No cheap component*

Cheap components render junk on the pavement...
----------------------------------

*It is an aftermarket forged crank, and an untouched (0 over, and clean) block*

Forged Crank, that's good....
Is it large journal or small journal?
-----------------------------------

Components listed:
Pistons, at least $200 a hole.
Rods, at least $200 each.
Crank, $2,000 to $2,500.
Balancing, $500 to $1,000.

You forgot to mention:
Roller Cam $250
Rev Kit for lifers, $150
Ultra light graphite or carbon fiber push rods, $200
Lightened Roller Rockers, $300 after machine work and X-ray.
Springs/ Locks/ Retainers (trip spring, titanium locks and retainers), $250 to $350
Valves, Depends on the heads, (ultra light, sodium filled stems) around $300 to $500
Heads, around $3,000 after minimal machine work and flow testing.
Cylinder case machining (block), Around $2,500, with out finishing bores, and additional $500 for that.(remember those Siamesed cylinders? they are gonna cost ya...)
Dry sump oiling system, $1,500 for a bare bones system.
Harmonic vibration dampener (balancer), $300 to $500, depending on application.
----------------------------------

Total cost of a reliable 10,000 RPM engine, built by a reputable shop, with horsepower ratings around 850 to 1,000, around $30,000.
No warranty.

That price does not include any type of intake, fuel or ignition system.

If you wanted a NASCAR style engine, with intake, carb, and ignition, it's the same price, almost the same horsepower, but is built to turn around 8,500 RPM absolute maximum, and makes it's best power around 6,500 RPM.
('best power' meaning torque and horsepower together)


"I Have The Body Of A God... Buddha"
Junk Yard Genius is offline  
Sponsored Links
Advertisement
 
post #4 of (permalink) Old 08-21-2000, 07:42 PM
**DONOTDELETE**
Guest
 
Posts: n/a
Re: High RPM survival questions

Thanks for the reply TR.
The guy wanting the motor owns Renegade Hybrids in Las Vegas. He is building a "calling card" 914.
Cash isn't toooo big an issue, he was anticipating $25k. Injection to pan, balancer to flywheel.
Thanks for all the sources.
It's time to make some calls, and, eventually spend someone elses money!!!!
I love doing that!!!!

BJ

See you on the pilf side
post #5 of (permalink) Old 08-21-2000, 07:47 PM
 
Join Date: Sep 1999
Posts: 5,383
Thanks: 0
Thanked 1 Time in 1 Post
 
Re: High RPM survival questions

If money isn't an 'Issue' send him my way, I'll toss you a finders fee...

"I Have The Body Of A God... Buddha"
Junk Yard Genius is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Off-Road Forums & Discussion Groups forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome