 Pistons, Dished vs Flat top |
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| newdeal2 |
 Jun 14 2004, 04:57 PM
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#1
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I purchased a set of Mahle pistons and requested flat tops. They sent me dished. I am keeping the engine stock [it's a 2.0 FI] and I figure I am only picking up about 3 hp with the flats so I may just put these in. I was told the dished also run cooler...any tuth to that?
Peter Attached image(s) 
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| Jake Raby |
Jun 14 2004, 04:59 PM
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#2
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Engine Surgeon  Group: Members Posts: 9,394 Joined: 31-August 03 From: Lost Member No.: 1,095 Region Association: South East States |
How big is the dish (cc wise) have a pic?
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| seanery |
Jun 14 2004, 05:08 PM
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#3
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waiting to rebuild whitey! Group: Retired Admin Posts: 15,852 Joined: 7-January 03 From: Indy Member No.: 100 Region Association: None |
non-educated guess here:
Do the dished run cooler because the compression is lower? |
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| Jake Raby |
Jun 14 2004, 05:34 PM
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#4
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Engine Surgeon Group: Members Posts: 9,394 Joined: 31-August 03 From: Lost Member No.: 1,095 Region Association: South East States |
There are different dished pistions.. Bus pistons have a 13-15cc dish. US Spec 914 pistons have a 7cc dish. Euro pistons have a 3cc dish, and some are totally flat.
LOWER CR DOES NOT RUN COOLER! The combinations of CR and camshaftare endless. Lower CR runs just as hot because it kills efficiency. Bus engines used lower CR mainly to get rid of cylinder pressures- a bus weighs near 5,000 pounds. |
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| Part Pricer |
Jun 14 2004, 05:35 PM
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#5
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Believe everything I post Group: Benefactors Posts: 1,825 Joined: 28-December 02 From: Danbury, CT Member No.: 35  |
Peter,
I'm not sure who you purchased these from, but if you decide to keep them you should make sure that they compensate you correctly. There is a dealer cost differential of $39.38 per set. IMO, they should offer you at least $50 to keep them. BTW, I wouldn't keep them. Insist that they send you what you paid for and have them pay shipping to return the wrong item they shipped. |
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| Mark Henry |
Jun 14 2004, 05:51 PM
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that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
(IMG:style_emoticons/default/agree.gif)
The big dish are bus pistons, if you paid for euro's (flat tops) then that's what you should get. Also the shipping should be on their dime if you ordered the euro's. |
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| newdeal2 |
Jun 14 2004, 06:26 PM
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#7
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Well the owner will replace them with Flat Tops on his dime. If they don't run "cooler" ... I don't want to sacrifice compression.
Thanks guys |
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| Jake Raby |
Jun 14 2004, 07:16 PM
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#8
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Engine Surgeon Group: Members Posts: 9,394 Joined: 31-August 03 From: Lost Member No.: 1,095 Region Association: South East States |
How can you prove they run cooler??
ALL the engines tuning will change with these, as the efficiency has been changed by about 20%. |
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| SirAndy |
Jun 14 2004, 07:18 PM
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#9
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Resident German Group: Admin Posts: 41,636 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
dude, 3 (or even 4) threads for one question ???
can't you keep it all together? i'm getting all confuzzeled, (IMG:style_emoticons/default/laugh.gif) Andy |
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| newdeal2 |
Jun 14 2004, 07:32 PM
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#10
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| Pnambic |
Jun 15 2004, 06:20 AM
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Honk if you like obscene gestures! Group: Members Posts: 914 Joined: 9-April 03 From: Atlanta, GA Member No.: 546 Region Association: South East States |
Dang, I thought at first that this thread might be about the DETROIT PISTONS humiliating those left coast Lakers in the finals this year.
(IMG:style_emoticons/default/boldblue.gif) (IMG:style_emoticons/default/lol2.gif) (IMG:style_emoticons/default/w00t.gif) Go PISTONS!!! |
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| newdeal2 |
Jun 15 2004, 11:32 AM
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#12
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OK, West Coast Core is sending me a set of AA Forged Flat top pistons. He says there are good pistons but then I am not sure who to trust.
Any opinions? |
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| Part Pricer |
Jun 15 2004, 11:37 AM
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#13
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Believe everything I post Group: Benefactors Posts: 1,825 Joined: 28-December 02 From: Danbury, CT Member No.: 35 |
AA? Others will chime in here, but I believe that those are the ones that are made in Japan and are of questionable quality.
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| Mueller |
Jun 15 2004, 11:44 AM
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#14
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914 Freak! Group: Members Posts: 17,146 Joined: 4-January 03 From: Antioch, CA Member No.: 87 Region Association: None 
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for the money, the AA import parts are a decent deal(inspect them carefully)
not too sure they offer forged pistons or not, my euro 2.0 flat tops from them are cast Go PISTONS!!! |
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| Mark Henry |
Jun 15 2004, 11:57 AM
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that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
Hmmmm.....
Sounds like someone that should be avoided. <_< If you paid for Mahle's you should get Malhe's. I'd most likely send it back and say forget it dOOd. |
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| Part Pricer |
Jun 15 2004, 12:12 PM
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#16
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Believe everything I post Group: Benefactors Posts: 1,825 Joined: 28-December 02 From: Danbury, CT Member No.: 35 |
QUOTE(Mark Henry @ Jun 15 2004, 12:57 PM) Hmmmm..... Sounds like someone that should be avoided. (IMG:style_emoticons/default/dry.gif) If you paid for Mahle's you should get Malhe's. I'd most likely send it back and say forget it dOOd. That's really good advice. I would send the seller a note stating something like: While I don't believe you intentionally listed this auction item fraudulently, it was an incorrect and negligent listing under Ebay guidlines. Since I did not receive what you advertised, I am return shipping it to you and expect you to return my $xxx.xx total costs plus an additional $yy.yy for return shipping costs which I expect will be the same as the original. This would make a total of $(xxx.xx + yy.yy). On receipt of your payment, I will consider the auction transaction complete and will leave you a positive feedback indicating you quickly resolved a problem and stand by what you are selling on ebay. As I notice most of your transactions are selling, this should be of help to you in all future transactions. Please reply. |
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| Mark Henry |
Jun 15 2004, 02:29 PM
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that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
Can we have the link to the ebay auction you won?
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| newdeal2 |
Jun 15 2004, 04:12 PM
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#18
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Here's the auction link. The pistons he sent were Mahles...they were in the original "kit" box. As you will see in the description he says add $70.00 for the flat tops. Somehow he missed it and sent the dished [bus] pistons. The owner has been very cooperative and also refunded the extra cost to ship them back. He is sending me AA flat tops and that's the only question at this point...will they be as good or equal to the Mahles.
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| newdeal2 |
Jun 15 2004, 04:14 PM
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#19
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| Mark Henry |
Jun 15 2004, 04:51 PM
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#20
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that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
Found it before you fixed it...
QUOTE BRAND NEW TYPE IV/PORSCHE piston and cylinders in the box ready to go set of 4 piston and cylinders 94mm,MANUFACTURE IS MAHLE. new piston, cylinders, rings, keepers, wrist pins. supplies are limited so purchase while at this low price. check my other auctions for: A complete engine gasket set $39.95 3)Pair rebuilt TYPE IV HEADS $359.95 exc. we also have ever thing to rebuild your complete motor in stock for immidiate delivery. ALso these are dished pistons if you would like flat topped add $70.00 to final price. thanks for looking, bidding and purchasing in advance. WEST COAST CORE 661-726-9915 If you paid $229.95 for your pistons, then yes, you bought bus pistons. If you added the $70. you should get Mahle flat tops. The AA's will work, just not as as good quality wise. Look for defects and I believe Jake said they're heavier. Get them balanced. |
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