Piston Numbers???

Aaron LaPree · 09-22-2001, 05:30 PM

I can't find anyone to help me one the phone so I thought I would ask all U smart guys. I just picked up a 302 from a guy around the corner for 100 bucks. It is a complete motor with what he was a very recent rebuild. For a hundred bucks who could same no. Well apart it came just to find out what it had in it. HOLY **** !!! It was JUST rebuilt and it was a 289 with 302 heads. Completely balanced even!! Now my problem is the pistons, they have a very big dome (big cam too) and I don't want to run a huge compression ratio. HOW BIG IS IT???? They are TRW pistons with the # 7061P.030 . 30 over I know but they look real big and don't want to have to run race gas all the time. Thanx for any help!!

AL

PKRWUD · 09-23-2001, 05:46 AM

Your new engine has 13:1 compression Speed-Pro Forged Aluminum Pistons.

When installed in a 302, the numbers are as follows:
Compress height: 1.600"
Dome height: .440"
Cyl. Head Vol: 53.5cc
Eff. Dome Vol: 10.4cc
Deck Clearance: .010"
Compress Gasket Thickness: .028"
Piston weight (w/o pin): 618 grams
Piston Pin Lock Ring: LR-194
Compression ratio @ .030" over: 13.00:1

Have fun buying gas!

Take care
~Chris

------------------
Retired Moderator
MustangNet

My site: JimPorterRacing

RACECAR spelled backwards is RACECAR

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Aaron LaPree · 09-23-2001, 02:48 PM

THANX!!!!!

AL

09-22-2001, 05:30 PM	#1
Aaron LaPree Registered Member Join Date: Nov 1998 Posts: 2	Piston Numbers??? I can't find anyone to help me one the phone so I thought I would ask all U smart guys. I just picked up a 302 from a guy around the corner for 100 bucks. It is a complete motor with what he was a very recent rebuild. For a hundred bucks who could same no. Well apart it came just to find out what it had in it. HOLY **** !!! It was JUST rebuilt and it was a 289 with 302 heads. Completely balanced even!! Now my problem is the pistons, they have a very big dome (big cam too) and I don't want to run a huge compression ratio. HOW BIG IS IT???? They are TRW pistons with the # 7061P.030 . 30 over I know but they look real big and don't want to have to run race gas all the time. Thanx for any help!! AL

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09-23-2001, 05:46 AM	#2
PKRWUD Junior Member Join Date: Mar 1999 Location: Ventura, California Posts: 8,981	Your new engine has 13:1 compression Speed-Pro Forged Aluminum Pistons. When installed in a 302, the numbers are as follows: Compress height: 1.600" Dome height: .440" Cyl. Head Vol: 53.5cc Eff. Dome Vol: 10.4cc Deck Clearance: .010" Compress Gasket Thickness: .028" Piston weight (w/o pin): 618 grams Piston Pin Lock Ring: LR-194 Compression ratio @ .030" over: 13.00:1 Have fun buying gas! Take care ~Chris ------------------ Retired Moderator MustangNet My site: JimPorterRacing RACECAR spelled backwards is RACECAR HEY !!! Are you ASE Certified ??? If you are, ask me about iATN. The best tool you'll ever have, and it's free !!!

09-23-2001, 02:48 PM	#3
Aaron LaPree Registered Member Join Date: Nov 1998 Posts: 2	THANX!!!!! AL