Brought to you in part by:

.

Tools & Supplies by Eastwood

  Mustangsandmore Forums
  Ford Racing
  dished pistons??

Post New Topic  Post A Reply
profile | register | preferences | faq | search

UBBFriend: Email This Page to Someone! next newest topic | next oldest topic
Author Topic:   dished pistons??
MrWesson22
Gearhead

Posts: 610
From: Dacula, GA
Registered: Sep 2000

posted 12-07-2001 10:17 AM     Click Here to See the Profile for MrWesson22   Click Here to Email MrWesson22     Edit/Delete Message   Reply w/Quote
I popped the heads last night on my cleve, and I've got dished pistons in there. I was told when I bought the motor it had flat tops and was 10.7:1. I guess we all know how that goes, huh?? I do have D0AE heads. When I get home tonight, I'll snap a pic or two with the dig cam and hopefully someone will recognize them and maybe give me a guess as to what kind of compression I actually have. I guess the silver lining on this cloud is that the lower compression will be better for n2o. Anyone want to make any kind of ballpark guess as to what kind of CR I might have here?? I've got no clue at this point. Thanks.

------------------
Neal
Member #723
[email protected] AIM: MrWesson22

69 Gulfstream Aqua Grande
351C/Toploader 4sp

IP: Logged

Moneymaker
Administrator

Posts: 11493
From: Lyons, IL, USA
Registered: May 99

posted 12-07-2001 10:43 AM     Click Here to See the Profile for Moneymaker   Click Here to Email Moneymaker     Edit/Delete Message   Reply w/Quote
8 something to 1 would be my guess.

------------------
Alex Denysenko
Co-Administrator and Moderator
NHRA/IHRA/SRA member
NHRA and IHRA SS/LA National Record Holder '00 & '01
Fleet of FoMoCo products
Moneymaker Bio
US Class Nationals link

IP: Logged

SteveLaRiviere
Administrator

Posts: 21832
From: Saco, Maine USA
Registered: May 99

posted 12-07-2001 01:04 PM     Click Here to See the Profile for SteveLaRiviere   Click Here to Email SteveLaRiviere     Edit/Delete Message   Reply w/Quote
I can't see them that good from here...

------------------
'70 Mustang Mach 1 M code 351C 4V/FMX/3.25 open
'72 Mustang Sprint Coupe 351C 4V/FMX/4.30 Trac Lok
'94 F-150 XL 5.8L/E4OD/3.55 Limited Slip
'97 Probe GTS 2.5L DOHC
My Photo Page
Christmas shopping? Why not use the Mustangsandmore.com Bookstore?

IP: Logged

Mpcoluv
Gearhead

Posts: 337
From: Charlotte NC usa
Registered: Apr 2001

posted 12-08-2001 10:33 AM     Click Here to See the Profile for Mpcoluv   Click Here to Email Mpcoluv     Edit/Delete Message   Reply w/Quote
I think the factory 10.7:1 pistons have a small dome. Flat tops should get you into the 10:1 range, so I would guess you would have 9:1 depending on the dish.
You really need to know the volume of the dish to accurately determine your compression.

IP: Logged

kid vishus
Gearhead

Posts: 1994
From: huh?? what? who? ME!?!?!?!
Registered: Oct 2000

posted 12-08-2001 10:57 AM     Click Here to See the Profile for kid vishus   Click Here to Email kid vishus     Edit/Delete Message   Reply w/Quote
If they are the old TRW forged dished piston (part # L2416F), they are advertised as 9.47-1 with a 63 cc head. If your heads are a "typical" closed chamber head, (not milled any) they should be around 67 cc's, those pistons should give you around 9-1. (based on the Federal Mogul catalog) If you were to cut a little off your heads, and deck the block to zero, you should be able to get 10-1 with them.

I have a set of them. And plan on using them again once I get some funds available to put another motor together.

IP: Logged

badazzcougar
Gearhead

Posts: 132
From: Seattle
Registered: Oct 2001

posted 12-08-2001 11:03 AM     Click Here to See the Profile for badazzcougar   Click Here to Email badazzcougar     Edit/Delete Message   Reply w/Quote
since you have the closed chamber heads flattops would give you the 10.7 assuming zero deck. The dished pistons would probably put you in the 9.8 to 10 range .

IP: Logged

Moneymaker
Administrator

Posts: 11493
From: Lyons, IL, USA
Registered: May 99

posted 12-08-2001 11:39 AM     Click Here to See the Profile for Moneymaker   Click Here to Email Moneymaker     Edit/Delete Message   Reply w/Quote
Don't forget to add the gasket thickness.

------------------
Alex Denysenko
Co-Administrator and Moderator
NHRA/IHRA/SRA member
NHRA and IHRA SS/LA National Record Holder '00 & '01
Fleet of FoMoCo products
Moneymaker Bio
US Class Nationals link

IP: Logged

kid vishus
Gearhead

Posts: 1994
From: huh?? what? who? ME!?!?!?!
Registered: Oct 2000

posted 12-08-2001 12:55 PM     Click Here to See the Profile for kid vishus   Click Here to Email kid vishus     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by Moneymaker:
Don't forget to add the gasket thickness.



I was taking that into account, assuming the 1013 Fel-pro gasket, which is listed at 8.8 cc's.

IP: Logged

chips67
Gearhead

Posts: 537
From: louisville, ky, usa
Registered: Jul 2001

posted 12-08-2001 08:49 PM     Click Here to See the Profile for chips67   Click Here to Email chips67     Edit/Delete Message   Reply w/Quote
ive always read that flatops and dished pistons are better than domes from a physics standpoint. the other thing (which is just a side point) is that cast pistons are better than forged or hyper. pistons on a naturally aspirated motor because they are lighter. was thinking of going to cast flatops when i rebuild my 5.0 motor in my 67.

------------------
67 coupe, 650dp and rpm intake on 5.0 with afr 165 heads, 4 speed, 4.11's.....best so far is [email protected] in 1/8 mile with 1.79 60ft. time.

IP: Logged

All times are ET (US)

next newest topic | next oldest topic

Administrative Options: Close Topic | Archive/Move | Delete Topic
Post New Topic  Post A Reply
Hop to:

Contact Us | Mustangsandmore Front Page

Copyright 2002, Steve LaRiviere


Ultimate Bulletin Board 5.47d

Amazon Honor System Click Here to Pay Learn More

[Build a free Mustangsandmore.ws Home Page!]

[About M&M][Acronym Guide][Calendar of Events][Chat Room][Classified Ads] [Links]

[Members' Photos] [M&M Mug Shots] [Technical Articles][Ford Parts Number Deciphering

[ Mustangsandmore.com Bookstore] [Advertise on Mustangsandmore.com] [Mustangsandmore.com T-Shirts]