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Old 03-01-2010, 10:02 AM
aallison aallison is offline
Gear Head
Join Date: Jun 08, 2007
Location: NE Florida
Posts: 515
401 Piston thoughts?

I'm building the motor for torque. I want a good dd, reliable and as fuel efficent as I can build a 401 and still get good torque. I want to run on pump gas. Mid grade gas if I can with no knocking. I might change the cam once I figure out what I have in there right now. Heads are stock 3320502, but have been cleaned up inside the runners. Performer intake, Doug Thorley Try Y headders. I'm thinking of Truck Avenger carb. Leaning towards a TFI ignition. Stock crank and rods. I was thinking aobut the KB pistions but I'm not convinced. I kept looking.

Anyway, I've found these pistions. I think these are the same pistions. BUt they are from the same company. e=ADME:X:RTQ:MOTORS:1123

I sent and email and the response is below.....
Dear aallison28,

You asked the following question:
I am looking for a set of AMC 401 pistions, .030 oversize. I tried to find more information on your website but I can't find the AMC pistions.

We show a set of PST2380A which are a exact copy of the L2380F from TRW/SpeedPro. These are a csast pistons from Rebuilders Choice. Diamond turned, weight matched, CH of 1.505, dish of .170, pin size of 1.007 press fit, ring lands are 5/56th 5/64th 3/16th and shows a compression of 10.56:1 @.030 w/ 50.6cc head. Now we show a ost of $264 on the set, rings are $41 cast and $62 moly. Give us a call if we can make a package deal on internal parts for you, Thank you Anthony 1 800 940 4379 #403

- hd_mad_dog

Anyone got any experience with these pistions? I thought the stock pin size was .975. Will these pins fit the stock rods? Cast or moly rings? I'm thinking cast. And with the 502 heads, I understand the CR will be around 9.5 to 1.

Any help or thoughts would be appreciated.

Last edited by aallison : 03-01-2010 at 10:16 AM.
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Old 03-01-2010, 10:17 AM
Ristow Ristow is offline
Join Date: Jan 20, 2006
Location: The Great Googley Moogley Midwest.
Posts: 17,240
i'm looking at the same set,thinking i'll go for it. stock pin is a few though over an inch for the press fit.
Originally Posted by Hankrod
Ristows right.................again,

Originally Posted by Fasts79Chief
... like the little 'you know what's' that you are.

Originally Posted by Fasts79Chief
I LOVE how Ristow has stolen my comment about him ... "Quoted" it ... and made himself famous for being an ***hole to people. Hahahahahahahahahha!

→ Where the kids hang out... come for the mindless chat,stay for the hand drawn emoticons.

It's like you're unraveling a big cable-knit sweater that someone keeps knitting...and knitting...and knitting...and knitting...
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Old 03-03-2010, 08:46 AM
aallison aallison is offline
Gear Head
Join Date: Jun 08, 2007
Location: NE Florida
Posts: 515
Some info on the TRW/Speed Pro pistons that are susposed to be the same as the Mad Dog one's.

Recessed head .170" with 4-valve relief. Press pins included. Ring dimensions 5/64 5/64 3/16. Compression ratio 10.56:1 @ 50.6 cc & 9.8:1 @ 58 cc. Compression distance 1.505.

I think I'll go with the cast rings..........

I'd like to hear what Ristow thinks about his............

Any other thoughts from anyone?
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