327 engine block strength
Thread Starter
6th Gear
Joined: Oct 2008
Posts: 6
Likes: 0
327 engine block strength
Hi i have a fully built 327 with arp main stud kit.
how much hp is possible with a 327 with stud kit?
I am turbo chaging motor.
everything is already built for turbo and starting
motor this weekend .
just want to know how much boost I can run.
looking at 6-8 based on what i have heard.
being that the block will only handle around 600hp
with stud kit.
i was told that with how it is built, for turbo ,
that it will put out between 350 to 400 hp without the
turbo to give a sense of the build.
8.5/1 compression
dart pro1 heads
keith black forged pistons
eagle specialty h-beam rods
ross racing rings
original forged crank refinished and balanced.
manley chromoly pushrods
compcams promagnum chromoly rockers
hydraulic flat tappet cam
canton road race oil 7qt oil pan
meeling hv oil pump
clevite bearings
the only things reused were the block,mains and crank.
everything else is brand new.
the block is good , .060 over and the crank is .02 under
from the refinishing.
motor was blueprinted and balanced by Jim grubb motorsports.
they told me 500-550 but others have told me 600.
what do you think?
how much hp is possible with a 327 with stud kit?
I am turbo chaging motor.
everything is already built for turbo and starting
motor this weekend .
just want to know how much boost I can run.
looking at 6-8 based on what i have heard.
being that the block will only handle around 600hp
with stud kit.
i was told that with how it is built, for turbo ,
that it will put out between 350 to 400 hp without the
turbo to give a sense of the build.
8.5/1 compression
dart pro1 heads
keith black forged pistons
eagle specialty h-beam rods
ross racing rings
original forged crank refinished and balanced.
manley chromoly pushrods
compcams promagnum chromoly rockers
hydraulic flat tappet cam
canton road race oil 7qt oil pan
meeling hv oil pump
clevite bearings
the only things reused were the block,mains and crank.
everything else is brand new.
the block is good , .060 over and the crank is .02 under
from the refinishing.
motor was blueprinted and balanced by Jim grubb motorsports.
they told me 500-550 but others have told me 600.
what do you think?
Drifting
Joined: Dec 2005
Posts: 1,360
Likes: 3
From: NORTHEAST
Those old blocks don't have much webbing in them compared to a 350 block and studs really don't make the caps any stronger as they are still a grey cast cap with good hardware, Its like putting new ARP bolts in an old set of rods the are no stronger its just better hardware.
We have put splayed caps on those blocks but even then at 600 horse there is not much webbing there.
If interested I have a small journal 327 block that has the 350 webbing and takes the 1 quart spin on filter 010/020 block and the mains are double tanged and it could be line bored to a 2.641 and you could run a large journal crank.
We have put splayed caps on those blocks but even then at 600 horse there is not much webbing there.
If interested I have a small journal 327 block that has the 350 webbing and takes the 1 quart spin on filter 010/020 block and the mains are double tanged and it could be line bored to a 2.641 and you could run a large journal crank.
Thread Starter
6th Gear
Joined: Oct 2008
Posts: 6
Likes: 0
they said 500 to 550
so I guess 6psi until I can dyno.
that is the minimum on my wastegate.
my friend kept telling me that they were being
super conservative about hp possiblity
to cover there own butts.
aparently he is full of it.
I did not know when I started having the motor built.
I would have used a ls1 6 bolt main if I had known
and had it street legal.
Thanks for the offer regarding the block sounds great.
Mine is already completely built and installed.
starting for first time tomorrow. My money is tapped and
already in debt on 0% credit. So I will have to pass that up.
I made the mistake of believing my friend about the hp capabilities
with out doing research.
too anxious to get goingand thought the motor would be cheaper than the ls1.
That guy is not involved in any way with my car anymore.
the motor is in my 240sx. so I guess even 500-550
will be awesome considering that with a 10pt rollcage and me in
it it still will only way around 3000lbs.
I wanted 1 to 5 hp to weight ratio but this will do.
Thread Starter
6th Gear
Joined: Oct 2008
Posts: 6
Likes: 0
Those old blocks don't have much webbing in them compared to a 350 block and studs really don't make the caps any stronger as they are still a grey cast cap with good hardware, Its like putting new ARP bolts in an old set of rods the are no stronger its just better hardware.
We have put splayed caps on those blocks but even then at 600 horse there is not much webbing there.
If interested I have a small journal 327 block that has the 350 webbing and takes the 1 quart spin on filter 010/020 block and the mains are double tanged and it could be line bored to a 2.641 and you could run a large journal crank.
We have put splayed caps on those blocks but even then at 600 horse there is not much webbing there.
If interested I have a small journal 327 block that has the 350 webbing and takes the 1 quart spin on filter 010/020 block and the mains are double tanged and it could be line bored to a 2.641 and you could run a large journal crank.
350 webbing. is possible my motor has this?
how much more would I be able to run with a block like that?
Drifting
Joined: Dec 2005
Posts: 1,360
Likes: 3
From: NORTHEAST
It is a rare find as We have seen alot of blocks over the years and I have only seen 2 of these.
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Thread Starter
6th Gear
Joined: Oct 2008
Posts: 6
Likes: 0
Got the motor started today.
ran into some problems though
To change the topic any ideas
why my oil pressure reads at over 100 psi
at 1400 rpm
and my water temp upon start up reads
around 230 and with in about 30 seconds gets to
250?
ran into some problems though
To change the topic any ideas
why my oil pressure reads at over 100 psi
at 1400 rpm
and my water temp upon start up reads
around 230 and with in about 30 seconds gets to
250?
Thread Starter
6th Gear
Joined: Oct 2008
Posts: 6
Likes: 0
could the relief valve still be a problem?
is the relief valve the same as bypass valve?
by proper connections do you mean the ground wire,
I read somewhere about not using too much if any
teflon tap to insure a good ground.
I will try adding a ground wire to both gauges.
Last edited by 550sx!; Nov 21, 2008 at 04:05 AM.