SBE 427 N/A FED Top End (Testing)
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From: Weatherford TX
SBE 427 N/A FED Top End (Testing) I will try my hardest to update this as much as I can.
We decided to take our production manager's stock C6Z to use as a test mule. This indeed will be a SBE N/A deal.
Test 1 will be our F710s with a Ported MSD
Test 2 will be our F710s with a FED Low Pro
Test 3 will be our F710s with a FED Freak Show intake.
Edit: This will be done on Pump 93 before jumping into E85 or Race Fuel. Compression is set to 12.5:1
We decided to take our production manager's stock C6Z to use as a test mule. This indeed will be a SBE N/A deal.
Test 1 will be our F710s with a Ported MSD
Test 2 will be our F710s with a FED Low Pro
Test 3 will be our F710s with a FED Freak Show intake.
Edit: This will be done on Pump 93 before jumping into E85 or Race Fuel. Compression is set to 12.5:1
Last edited by JRFed; Nov 4, 2020 at 02:39 PM. Reason: Missing Info
I guess probably need a little more detail on the cam in general sounds pretty big and is it solid or HR. I presume a stick car (I know they all came with a stick). Looks like has your heads on it now and an MSD and a vararam intake, and headers. Should be an interesting test.
Thread Starter
On The Tree
Joined: Mar 2020
Posts: 168
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From: Weatherford TX
Sorry for the lack of details, answering phone calls get's me side tracked lol, this is still a Hydraulic roller cam (Spec's once I get them)
Heads: F710s 287cc with 2.250" Xceldyne Ti Intake valves 1.615" Stainless Exhaust Valves PAC 1207X .700" Dual Springs w/Ti Retainers
Cam: FED Spec'd Hydraulic Roller 8620 Core
Ported only MSD (Stock runner length)
Stock OEM Rockers with a CHE Trunnion Kit
.051" Gaskets
Yes we had to fly cut pistons.
2" ARH Headers with 3" Borla Cat Back
Monster Clutch
NW103 TB
Vararam CAI
Will update this post as I gather more info
Heads: F710s 287cc with 2.250" Xceldyne Ti Intake valves 1.615" Stainless Exhaust Valves PAC 1207X .700" Dual Springs w/Ti Retainers
Cam: FED Spec'd Hydraulic Roller 8620 Core
Ported only MSD (Stock runner length)
Stock OEM Rockers with a CHE Trunnion Kit
.051" Gaskets
Yes we had to fly cut pistons.
2" ARH Headers with 3" Borla Cat Back
Monster Clutch
NW103 TB
Vararam CAI
Will update this post as I gather more info
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I see you fly cut the pistons but I also so you bumped compression up to 12.5 to 1 which means you shaved the head a lot. If you did not shave the head would you have needed to cut the pistons? Or was it also the 2.25 valve was hitting stuff (versus OEM 2.20). The reason I ask this is people who might be interested in product would want to know this. Of course the cam size could be suspect too. For example as long as you don't shave more than .020 out or run a 2.20 valve the OEM pistons are fine. Most aftermarket pistons have bigger valve reliefs I know my Wiesco are like .080 deeper and have a 2.25 valve semi circle in the piston relief.
Thread Starter
On The Tree
Joined: Mar 2020
Posts: 168
Likes: 110
From: Weatherford TX
Thread Starter
On The Tree
Joined: Mar 2020
Posts: 168
Likes: 110
From: Weatherford TX
I see you fly cut the pistons but I also so you bumped compression up to 12.5 to 1 which means you shaved the head a lot. If you did not shave the head would you have needed to cut the pistons? Or was it also the 2.25 valve was hitting stuff (versus OEM 2.20). The reason I ask this is people who might be interested in product would want to know this. Of course the cam size could be suspect too. For example as long as you don't shave more than .020 out or run a 2.20 valve the OEM pistons are fine. Most aftermarket pistons have bigger valve reliefs I know my Wiesco are like .080 deeper and have a 2.25 valve semi circle in the piston relief.
Very Good numbers - thanks for answering the questions. Good to know the baseline and if you stick with normal CCs and gasket thickness the head bolts on. Post a dyno graph when you get one.