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michla
Samba Member
Joined: January 17, 2003
Posts: 331
Location: Wasilla, AK (yes, there's drag racing up here !)
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 Posted: Fri Sep 12, 2014 11:43 pm Post subject: Cylinders for DRAG RACING |
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I'm on the hunt for good 92mm cylinders for pure draggin'. Sure the Cima's and Mahle's are good stuff, but the price is up enough around some of the specialty aftermarket these days!
I have perfectly fine CIMA stroker pistons, just looking to replace the cylinders and yes, they'll be honed to size for the proper clearance, etc etc
Anybody have any input on some good brands to look for lately? AA's are out the window in my camp. Nickies are nice but $3500 isn't my bag.
Normally aspirated 86mm-stroked engine. |
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fastone
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Joined: August 16, 2010
Posts: 211
Location: So Cal
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vwracerdave
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Joined: November 11, 2004
Posts: 15309
Location: Deep in the 405
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| Posted: Sat Sep 13, 2014 7:26 am Post subject: |
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It has been said that Mahle is now using AA cylinders in their piston kits.
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2017 Street Comp Champion - Thunder Valley Raceway Park - Noble, OK
2010 Sportsman ET Champion - Mid-America Dragway - Arkansas City, KS
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michla
Samba Member
Joined: January 17, 2003
Posts: 331
Location: Wasilla, AK (yes, there's drag racing up here !)
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| Posted: Sat Sep 13, 2014 11:00 am Post subject: |
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yeah my spigot holes, cylinder head openings and tooling are 92mm and AC starts at 94 |
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michla
Samba Member
Joined: January 17, 2003
Posts: 331
Location: Wasilla, AK (yes, there's drag racing up here !)
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| Posted: Sat Sep 13, 2014 11:02 am Post subject: |
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| vwracerdave wrote: |
| It has been said that Mahle is now using AA cylinders in their piston kits. |
thanks, I needed that !
I won't buy AA...in fact they can use them for target practice as far as I'm concerned. |
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michla
Samba Member
Joined: January 17, 2003
Posts: 331
Location: Wasilla, AK (yes, there's drag racing up here !)
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| Posted: Sat Sep 13, 2014 11:57 am Post subject: |
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| vwracerdave wrote: |
| It has been said that Mahle is now using AA cylinders in their piston kits. |
John at Aircooled.net replied "....yes; even the Mahle sets now come with AA cylinders in them, and have for almost 5 years now". |
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modok
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Joined: October 30, 2009
Posts: 26789
Location: Colorado Springs
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| Posted: Sat Sep 13, 2014 12:02 pm Post subject: |
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For drag racing?? what's so special about that?
The thickwall cylinders would work well. At 86 stroke tho you'd be good to have longer ones or c pistons. |
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andy198712
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Joined: December 05, 2010
Posts: 1209
Location: Cornwall - UK
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| Posted: Sat Sep 13, 2014 12:09 pm Post subject: |
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whats so bad with AA cylinders? how many HP are you aiming for?
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jfats808
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Joined: December 10, 2007
Posts: 5022
Location: oahu hawaii
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| Posted: Sat Sep 13, 2014 1:42 pm Post subject: |
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The Tims use AA cylinders and wiesco pistons in their personal drag engines. I know their engine is over 260hp. If they say they work fine for drag racing, thats what im going to use when I build a drag engine. I have read that boosted engines in excess of 25 to 28lbs+ cracks them. By then, you should be running a pauter, LA sleeve or autocraft.
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| Rockstar Suzuki wrote: |
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farmhand
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Joined: April 06, 2011
Posts: 109
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| Posted: Sat Sep 13, 2014 2:22 pm Post subject: |
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Simple solution... Just bore and hone a set of used "CIMA/MAHLE" 90.5 cylinders to 92 bore. Simple and cheap.
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Eaallred
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Joined: May 18, 2003
Posts: 5756
Location: West Valley City, Utah
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| Posted: Sat Sep 13, 2014 3:07 pm Post subject: |
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If your tune is right/safe, they'll work fine. I'm running the Mahle/AA cylinders and am pushing 24 lbs of boost (roughly 400+ to the wheels) and they are holding up. I went lean and burned them right up though, but most will.
Unless you're going radical race engine, you should be fine
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You have to remember something: Everybody pities the weak; Jealousy you have to earn. |
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michla
Samba Member
Joined: January 17, 2003
Posts: 331
Location: Wasilla, AK (yes, there's drag racing up here !)
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| Posted: Sat Sep 13, 2014 8:20 pm Post subject: |
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| farmhand wrote: |
| Simple solution... Just bore and hone a set of used "CIMA/MAHLE" 90.5 cylinders to 92 bore. Simple and cheap. |
So you are saying the regular 92mm are actually 90.5 cylinders honed out?
HHmmmm....interesting 
I suppose it depends on who does the work and how.... |
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michla
Samba Member
Joined: January 17, 2003
Posts: 331
Location: Wasilla, AK (yes, there's drag racing up here !)
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| Posted: Sat Sep 13, 2014 8:23 pm Post subject: |
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| Eaallred wrote: |
Unless you're going radical race engine, you should be fine |
Nah, probably 180-190hp normally aspirated--12.50's in the quarter. I just haven't heard very good impressions of the AA's. But unless I go to 94's, it looks like I may have NO choice. |
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michla
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Joined: January 17, 2003
Posts: 331
Location: Wasilla, AK (yes, there's drag racing up here !)
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| Posted: Sat Sep 13, 2014 8:25 pm Post subject: |
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| andy198712 wrote: |
| whats so bad with AA cylinders? how many HP are you aiming for? |
alloy
180-190
just replacing tired cylinders on the engine, pistons look great |
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michla
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Joined: January 17, 2003
Posts: 331
Location: Wasilla, AK (yes, there's drag racing up here !)
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| Posted: Sat Sep 13, 2014 8:26 pm Post subject: |
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| modok wrote: |
| At 86 stroke tho you'd be good to have longer ones or c pistons. |
I've never heard of "c" pistons ! clue me |
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modok
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Joined: October 30, 2009
Posts: 26789
Location: Colorado Springs
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| Posted: Sat Sep 13, 2014 8:40 pm Post subject: |
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A c piston is what we call one shorter than a B.
This is a piston for HP use
https://www.uempistons.com/index.php?main_page=pro...2788aa680a
29.6 rather than 34.5mm pin height, this allows up to 88mm stroke in stock length cylinder.
Nothing wrong with AA cylinders. Thinwall 92 cylinders are too flexy no matter what iron you make them from.
yes 90.5 and 92 are the same cylinder casting.
Thickwall 92 and 94 are same too |
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vwracerdave
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Joined: November 11, 2004
Posts: 15309
Location: Deep in the 405
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| Posted: Sat Sep 13, 2014 8:42 pm Post subject: |
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It isn't the AA cylinders that are failing. The problems have been with AA pistons.
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2017 Street Comp Champion - Thunder Valley Raceway Park - Noble, OK
2010 Sportsman ET Champion - Mid-America Dragway - Arkansas City, KS
1997 Sportsman ET Champion - Thunder Valley Raceway Park - Noble ,OK |
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bugguy1967
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Location: Los Angeles, CA 90016
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michla
Samba Member
Joined: January 17, 2003
Posts: 331
Location: Wasilla, AK (yes, there's drag racing up here !)
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| Posted: Sun Sep 14, 2014 12:32 am Post subject: |
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Man, now that IS a short piston! Only bummer about the lack of a longer skirt is "piston rock" or tilting in the bore--wears out the cylinder faster, but then that is the price of racing, right? At $435...ouch! |
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michla
Samba Member
Joined: January 17, 2003
Posts: 331
Location: Wasilla, AK (yes, there's drag racing up here !)
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| Posted: Sun Sep 14, 2014 12:42 am Post subject: |
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| bugguy1967 wrote: |
| This is exactly what you're looking for |
Very cool !!! Man, I can only imagine what the shipping from Sweden to Alaska would be, but then again quality like that doesn't come along very often. |
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