460 Ford Forum banner
1 - 1 of 1 Posts

·
Premium Member
Joined
·
1,204 Posts
Discussion Starter · #1 ·
Next Topic >> Return to Index

overbore DOVE BB four bolts
January 4 2006 at 4:20 PM
Score 3.0 (1 person) Flip (Login 56ford-f100)
from IP address 195.240.203.126

--------------------------------------------------------------------------------

Hello,



i am Flip , i am from Holland, and I have some questions.

I have a DOVE-A four bolts BB 429, and this block must be overbore because the cylinders have water damages. We don't know how many overbore, because we can see that when we going to bore this cylinders till they are clean. We want to take L2366F TRW pistons. Are these Pistons only in 0.030 and 0.040 overbore available? If we needed to bore to 0.060 overbore what for pistons we needed then, ore have TRW also 0.060 overbore? Can you give me the dimensions of the bore of the cylinder for the 0.030, 0.040 and the 0.060 overbore? We take standard gasoline. Very important are for us the cylinder boring dimensions for 0.03, 0.04, and 0.06 overbore.

What is the max overbore for this block?

Our can you give me a side with the technical details of the TRW pistons.



Thank you for your cooperation



Kind regards

Anton Flipsen

Score 1 2 3 4 5 (5=Excellent) Edit Message Delete Message Lock Thread Respond to this message

Author Reply

Byron
(Login ByronRACE)
65.173.1.34 Wall thicknesses vary.
Score 2.0 (1 person) January 4 2006, 5:22 PM

There is no way to know how thick the cylinder walls in your block are until they are sonic checked.

If you have too much rust in the bores to do this, you'll have to bore the block as much as is necessary then check it.

It's not uncommon for these blocks to go .080 over. I've heard of some that went more.

And, don't forget...you can sleeve it if you want to.

As far as pistons are concerned, off the shelf pistons will be more limited for this application than a custom set. You could go to www.cppistons.com and order whatever you want if it is determined you need something you can't get off-the-shelf. I have a set of CP's in my blower motor. I moved the pin location, the position of the rings, the thickness of the top ring land, and so forth...they can do anything and the set was around $800-900 totally custom designed.

Byron

Score 1 2 3 4 5 (5=Excellent) Edit Message Delete Message Lock Thread Respond to this message


Paul Kane
(Login PaulKane)
69.181.83.142 Flip, I Received Your Email Today...
No score for this post January 4 2006, 5:35 PM

...I just haven't replied yet.

The .060" overbore TRW flat-top for the 429 is part number (Summit Racing part number) TRW-L2368F60. It is essentially the same piston as the +.030" and +.040" pistons you mentioned, except it is +.060". Retail price is US$42.39 each. This comes with the piston, wrist pin and circlips. You will still need to purchase the rings for this piston, as they are not included with the piston(s).

In regards to your question on actual bore size/pistons clearance: Usually the boresize is indeed the actual dimension (such as 4.39" or 4.42") and the piston is usually undersize to accomodate the specified bore. TRW recommends a piston-to-skirt clearance of .0035", but this may change depending on your specific application and/or other racer tricks.

.060" overbore should be no problem with your D0VE-A 4-bolt block.

Paul






Introducing:


High Flow Dynamics


Performance Components for the 429/460 Engine Family




[email protected]




This message has been edited by PaulKane from IP address 69.181.83.142 on Jan 4, 2006 5:39 PM
This message has been edited by PaulKane from IP address 69.181.83.142 on Jan 4, 2006 5:37 PM




Score 1 2 3 4 5 (5=Excellent) Edit Message Delete Message Lock Thread Respond to this message

Flip
(Login 56ford-f100)
195.240.204.101 Bore dimension
No score for this post January 5 2006, 3:14 PM

Hello Paul,

Is it so that the Piston-to-skirt clearance of 0.0035" that the piston is undersize, or for example when i bore 0.040 over and that will be than a bore of 4.4" that i must make this bore 0.0435"? How can i get this information about this Piston-to-skirt clearance?

kind regards

flip

Score 1 2 3 4 5 (5=Excellent) Edit Message Delete Message Lock Thread Respond to this message

Charlie S.
(Login DblAdigger)
71.109.159.250 In a case like this, I'd take the block to
No score for this post January 6 2006, 12:10 AM

the machine shop you are going to use, have them select the worst bore, and bore that cylinder till it is almost cleaned up. If it cleans at, say .027 over standard, order .030 pistons. DON'T bore the block till yoy have all the pistons, that way they can be fitted to each bore. You want to keep the bores as small as possible for strength and to allow for more rebuilds later.

Score 1 2 3 4 5 (5=Excellent) Edit Message Delete Message Lock Thread Respond to this message

flip
(Login 56ford-f100)
195.241.28.128 Re: In a case like this, I'd take the block to
No score for this post January 10 2006, 1:38 PM

Thanks for this info

kind regards
Flip

Score 1 2 3 4 5 (5=Excellent) Edit Message Delete Message Lock Thread Respond to this message

Current Topic - overbore DOVE BB four bolts

Next Topic >> Return to Index
 
1 - 1 of 1 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top