Going to use these 11:1 pistons with S&S 4.250 cyl ,however using BB calculator heads 89cc/30 thou gasket/Zero deck only getting 10:83 comp, using the spec found wiseco site of -9.8cc dome
Anyone come across this
Is that the measured volume of the heads or an estimate. Mine ended up being 88 cc's
Quote from: yobtaf103 on December 09, 2019, 05:46:24 AM
Going to use these 11:1 pistons with S&S 4.250 cyl ,however using BB calculator heads 89cc/30 thou gasket/Zero deck only getting 10:83 comp, using the spec found wiseco site of -9.8cc dome
Anyone come across this
Well no one has come across this probably, not sure looks like a senior moment!!
Done the inputs on BB calc today comes out Fine
Zero deck gives 11.35:1 static, 10.27:1 corrected 44 int close cam, 219.2 ccp sea level
Buildng a 128" currently.
Waiting on injectors.
Quote from: Txwezl on December 09, 2019, 07:05:14 AM
Is that the measured volume of the heads or an estimate. Mine ended up being 88 cc's
Fuel Moto is using that same setup in their 128 piston/cylinder only kit and they state it comes in at about 10.75:1. So my guess is, you are correct.
Quote from: ziggy24 on December 10, 2019, 07:23:30 AM
Quote from: Txwezl on December 09, 2019, 07:05:14 AM
Is that the measured volume of the heads or an estimate. Mine ended up being 88 cc's
Fuel Moto is using that same setup in their 128 piston/cylinder only kit and they state it comes in at about 10.75:1. So my guess is, you are correct.
Looks like they achieve 10.75:1, with their supplied kit Gaskets (0.045" head?) & about bolt-on 10 thou in the hole then.
With 0.030" head gasket stock heads about 87.5cc zero deck get 11.5:1 static
Quote from: Hillside Motorcycle on December 10, 2019, 04:13:26 AM
Buildng a 128" currently.
Waiting on injectors.
I would imagine you are referring to my CVO RG... So looking forward to the awesome build you are doing for me... Going to be a BEAST 💪
Quote from: yobtaf103 on December 10, 2019, 09:02:55 AM
Quote from: ziggy24 on December 10, 2019, 07:23:30 AM
Quote from: Txwezl on December 09, 2019, 07:05:14 AM
Is that the measured volume of the heads or an estimate. Mine ended up being 88 cc's
Fuel Moto is using that same setup in their 128 piston/cylinder only kit and they state it comes in at about 10.75:1. So my guess is, you are correct.
Looks like they achieve 10.75:1, with their supplied kit Gaskets (0.045" head?) & about bolt-on 10 thou in the hole then.
With 0.030" head gasket stock heads about 87.5cc zero deck get 11.5:1 static
Pretty sure the cometic head gaskets I was supplied by FM were .030. Also, from everywhere I read, the factory head volume is close to 89cc.
Quote from: yobtaf103 on December 10, 2019, 09:02:55 AM
Quote from: ziggy24 on December 10, 2019, 07:23:30 AM
Quote from: Txwezl on December 09, 2019, 07:05:14 AM
Is that the measured volume of the heads or an estimate. Mine ended up being 88 cc's
Fuel Moto is using that same setup in their 128 piston/cylinder only kit and they state it comes in at about 10.75:1. So my guess is, you are correct.
Looks like they achieve 10.75:1, with their supplied kit Gaskets (0.045" head?) & about bolt-on 10 thou in the hole then.
With 0.030" head gasket stock heads about 87.5cc zero deck get 11.5:1 static
Just had my 114 upgraded into a 128 by FM. 11.0:1 compression to run with a Wood wm8-408 cam.
Quote from: Heatwave3 on December 18, 2019, 12:01:00 PM
Quote from: yobtaf103 on December 10, 2019, 09:02:55 AM
Quote from: ziggy24 on December 10, 2019, 07:23:30 AM
Quote from: Txwezl on December 09, 2019, 07:05:14 AM
Is that the measured volume of the heads or an estimate. Mine ended up being 88 cc's
Fuel Moto is using that same setup in their 128 piston/cylinder only kit and they state it comes in at about 10.75:1. So my guess is, you are correct.
Looks like they achieve 10.75:1, with their supplied kit Gaskets (0.045" head?) & about bolt-on 10 thou in the hole then.
With 0.030" head gasket stock heads about 87.5cc zero deck get 11.5:1 static
Just had my 114 upgraded into a 128 by FM. 11.0:1 compression to run with a Wood wm8-408 cam.
Do they use Wiseco pistons ? I had a bad experience with those pistones back when the 106 kits were popular for the Twin Cams, the teeny- tiny rings jumped out of the teeny- tiny ring lands and , well you can guess what happened next.
MY 128 Fuel Moto build included Carillo forged flat top pistons for an 11.0:1 ratio
https://www.fuelmotousa.com/i-23897756-fuel-moto-m8-128-big-bore-kit-for-114-117-engines.html
Quote from: metaliser on December 22, 2019, 06:29:25 AM
Quote from: Heatwave3 on December 18, 2019, 12:01:00 PM
Quote from: yobtaf103 on December 10, 2019, 09:02:55 AM
Quote from: ziggy24 on December 10, 2019, 07:23:30 AM
Quote from: Txwezl on December 09, 2019, 07:05:14 AM
Is that the measured volume of the heads or an estimate. Mine ended up being 88 cc's
Fuel Moto is using that same setup in their 128 piston/cylinder only kit and they state it comes in at about 10.75:1. So my guess is, you are correct.
Looks like they achieve 10.75:1, with their supplied kit Gaskets (0.045" head?) & about bolt-on 10 thou in the hole then.
With 0.030" head gasket stock heads about 87.5cc zero deck get 11.5:1 static
Just had my 114 upgraded into a 128 by FM. 11.0:1 compression to run with a Wood wm8-408 cam.
Do they use Wiseco pistons ? I had a bad experience with those pistones back when the 106 kits were popular for the Twin Cams, the teeny- tiny rings jumped out of the teeny- tiny ring lands and , well you can guess what happened next.
Yes 10.75 kits Wiseco Black coated pistons 3mm scraper with Daytona type jugs