ACN super squishies

[mark tucker]

with what I have read, the pistons I ran for oh somany years at 13.8cr in my daily driven street car running 93 oct fuel(pump gas) must of been squisheys. about 14 years of hard abuse, they have now been ceramic & dfl coated and ready for usage again( @ over 14.5 cr).I hope I get to use them again,618 hp (dyno&track calc .within about 10 hp)from a streetable small block is a lot fun. I wish I could get a set of pistons for these vw's for what I paid for them ohsomany years ago.(around 1982)I dont know if I will ever get to use any of the vw squisheys,Im tryen to wind down on this stuff(like thats going to happen)but you never know I still have atleast 3 of my own motors in the works.and realy dont want to do any body elses any more, just too much time away from my shit.
the mazda system looks good & with the right forging could be transfered to our vw stuff. and thier low cr diesel is neet too and with the right management could also be transfered over.possiably on the same motor!!now thats flex fuel

[bugnut68]

[67Beetle2017]

[VIN]

[mark tucker]

[fuguboy]

Is a custom camshaft best to get the most from these pistons with stock gears ? I am building a 2334 with K-10 cam and like the SS theory .

[DarthWeber]

I believe John (AC.Net) recommends the Web 86B with the SS pistons although he has run the 86C too. There is a ton of info on SS pistons on CalLook.com, just wade thru the SS haters comments and you can learn a lot about the combos that work from the guys actually running them.

Most run the cam about 4 degrees retarded (to prevent valve/piston clash) and the engines need very little timing, often less than 28 degrees of advance.

SS technology is quite interesting. Running 13:1, running very cool with tons of torque and having the ability to literally drive your VW across the USA is very neat indeed. I only wish SS pistons came in sizes other than 94mm.
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[Eaallred]

[DarthWeber]

[Steve Arndt]

I'm running a Web 86A on 115 lobe center, retarded two degrees for piston to valve clearance during overlap. Also Udo tool steel lifters. Previously I ran the standard squishy 86B setup of 114LC -4.

[midtravelmidengine]

they should make them in 85.5 for the mileage guys & 90.5B's for the 2110 guys as well...
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[DarthWeber]

[Alstrup]

Hello.
To aid to the discussion of whether to use these or not, - one of my std plus engine customers phoned me last friday.
(His engine is a 1914 SS type 1 w. a modified 34 mm PICT3 (now 38 w. 30 mm venturi) hand made end pieces 1" longer than normal and 31,5 mm I.D. stock ported heads 10,6 CR, 009 distr. w. modified advance curve, Raptor special grind (240 @ 0,50) split lift, 26 mm pump, 1½" heaterboxes and a CSP super comp exhaust. Transmission is a 3,88 R/P w. 0,89 4rth. 195/65 rears)
He and his wife just did a 376 mile trip in 6 hrs, one fuel and stretch legs stop included. Cruise speed 75-80 mph. He averaged 14,3 km/l (33,3 mpg) Oil temps between 170 and 182 F.
Engine is producing 96 hp @ 4400 and 160 NM max at 3300 rpm.

On this engine I modified the piston to match the combustion chamber in stead of the other way around. I took a 3D measurement of the chamber and had the "crown" machined so I had 1,2 mm clearance to the chamber. Seems to work well.

T

[bugnut68]

[DarthWeber]

Awesome results Alstrup, awesome!!
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