good 347 buy?
06-08-2009, 06:55 PM
#1
5th Gear Member
Thread Starter
Join Date: Jun 2005
Location: So. California
Posts: 2,258
good 347 buy?
I came accross this 347 for sale. hoping some of the experts can say yea or nay (Woody). I have brand new afr 185s, AirGap, ProMag 1.6 roller rockers, Oil pan. Just need a short block. Do the afr's work with this guys pistons?
Ok im selling my forged 347 shortblock from my parted out 89gt. Motor has 200 miles on it and thats it. Will include complete build sheet and receipts for everything. Willing to let it go as I have no room to keep it stored. Included will be----
--Trickflow stg2 cam
--Ford Racing timing chain set
--Ford OEM oil pan and pickup
--Melling high pressure/standard volume pump
--OEM Timing cover with Ford Racing standard rotation water pump
--Professional Products 28oz balancer
--Ford racing roller pilot bearing/felpro rear main seal
MOTOR-
Diamond Pro forged flat-top pistons
4340 I-beam rods
Clevite bearings
10.7:1 C/R with my 58cc edelbrock heads.
Ok im selling my forged 347 shortblock from my parted out 89gt. Motor has 200 miles on it and thats it. Will include complete build sheet and receipts for everything. Willing to let it go as I have no room to keep it stored. Included will be----
--Trickflow stg2 cam
--Ford Racing timing chain set
--Ford OEM oil pan and pickup
--Melling high pressure/standard volume pump
--OEM Timing cover with Ford Racing standard rotation water pump
--Professional Products 28oz balancer
--Ford racing roller pilot bearing/felpro rear main seal
MOTOR-
Diamond Pro forged flat-top pistons
4340 I-beam rods
Clevite bearings
10.7:1 C/R with my 58cc edelbrock heads.
Last edited by eZ; 06-08-2009 at 06:57 PM.
06-08-2009, 09:33 PM
#5
5th Gear Member
Join Date: Apr 2007
Location: Texas Hill Country
Posts: 2,100
Ok, to know whether the heads work with the pistons, we need to know:
What combustion chamber size are the 185s?
What is the piston to deck clearance (how far in the hole are the pistons)?
What pistons have any valve relief (dish) or are they completely flat?
What bore and stroke will you have?
Advertised compression ratios mean little to nothing since they are often not based on math specific to your motor.
He mentions 4340 I beam rods which are good, but what crank is in it?
When was the block machined last and what was done?
Has anyone magnafluxed it to check for cracks?
347 is a pretty rowdy stroker for a short deck 302 block. Keep in mind that they are often road hard and put up wet.
What combustion chamber size are the 185s?
What is the piston to deck clearance (how far in the hole are the pistons)?
What pistons have any valve relief (dish) or are they completely flat?
What bore and stroke will you have?
Advertised compression ratios mean little to nothing since they are often not based on math specific to your motor.
He mentions 4340 I beam rods which are good, but what crank is in it?
When was the block machined last and what was done?
Has anyone magnafluxed it to check for cracks?
347 is a pretty rowdy stroker for a short deck 302 block. Keep in mind that they are often road hard and put up wet.
06-08-2009, 10:22 PM
#6
5th Gear Member
Thread Starter
Join Date: Jun 2005
Location: So. California
Posts: 2,258
Ok, to know whether the heads work with the pistons, we need to know:
What combustion chamber size are the 185s?
What is the piston to deck clearance (how far in the hole are the pistons)?
What pistons have any valve relief (dish) or are they completely flat?
What bore and stroke will you have?
Advertised compression ratios mean little to nothing since they are often not based on math specific to your motor.
He mentions 4340 I beam rods which are good, but what crank is in it?
When was the block machined last and what was done?
Has anyone magnafluxed it to check for cracks?
347 is a pretty rowdy stroker for a short deck 302 block. Keep in mind that they are often road hard and put up wet.
What combustion chamber size are the 185s?
What is the piston to deck clearance (how far in the hole are the pistons)?
What pistons have any valve relief (dish) or are they completely flat?
What bore and stroke will you have?
Advertised compression ratios mean little to nothing since they are often not based on math specific to your motor.
He mentions 4340 I beam rods which are good, but what crank is in it?
When was the block machined last and what was done?
Has anyone magnafluxed it to check for cracks?
347 is a pretty rowdy stroker for a short deck 302 block. Keep in mind that they are often road hard and put up wet.
I emailed him your other questions.
My idea is to do a newb short block build thread with everyones help from the forum. Good idea?
06-09-2009, 11:34 AM
#9
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Join Date: Apr 2007
Location: Texas Hill Country
Posts: 2,100
We still need to know the piston to deck height. How far in the hole is it?
Assuming 0.00 in the hole and a .041 head gasket, and 4cc valve relief, you are looking at a 11:1 compression ratio. You will probably have detonation issues unless the pistons are in the hole some and/or the valve reliefs are a little bigger.
Assuming 0.00 in the hole and a .041 head gasket, and 4cc valve relief, you are looking at a 11:1 compression ratio. You will probably have detonation issues unless the pistons are in the hole some and/or the valve reliefs are a little bigger.
Last edited by urban_cowboy; 06-09-2009 at 11:58 AM.
06-09-2009, 12:39 PM
#10
5th Gear Member
Thread Starter
Join Date: Jun 2005
Location: So. California
Posts: 2,258
Im not sure this guy knows everything about the motor. he had someone else build it. It was the first time the motor was rebuilt and it is now .30 over. So the deck height should be good right? If I end up with 11:1 can I use a larger head gasket? If worse comes to worse do I buy new pistons? He did say it has large valve releifs but if he was running 10.7:1 with his edelbrock heads Im sure the afr will be a lil tighter.