CUSTOM PORTED LS1 #853 Heads FERROA Valves FRESH FROM MACHINE SHOP
03-03-2007, 05:06 PM
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CUSTOM PORTED LS1 #853 Heads Ferrera Valves FRESH FROM MACHINE SHOP CUSTOM PORTED LS1 #853 Heads Ferrera Valves FRESH FROM MACHINE SHOP
99-00 #853
Casting Number 853
LS1 (Center Bolt)
99-00 5.7L Passenger Car and Corvette (853)
01+ 5.7L Passenger Car and Corvette (241)
Material: Aluminum
Combustion Chamber Volume: 66.67cc (Milled to 57CC)
Intake Port Volume: 200cc
Exhaust Port Volume: 70cc
Intake Valve Diameter: 2.00 inches (Aftermarket 2.02Ferrera)
Exhaust Valve Diameter: 1.55 inches
Fresh from the machine shop w/ new valve seals.
921 comp valve springs(Properly seated w/ equal spring pressure)
Ferrera 2.02 aftermarket intake valves
Milled to give 11.7:1 compression. (W/ good tune run excellent on pump gas)(Was previously tuned by Jeremy Formato on original owners daily driver 01 TA)
Install info from original owners car.
https://ls1tech.com/forums/generation-iii-internal-engine/221398-rev-xtreme-stage-3-heads-xr4-cam.html
Dyno Sheet
https://ls1tech.com/forums/attachmen...chmentid=15130
Info on company who did the install
http://www.pm-fl.com/catalog/results...463fe3437de1d4
Click "Camaro/Firebird 1998-2002 LS and look for
"Ryan's 2001 Firebird 6-Speed -- 450 RWHP / 404 RWTQ
Precision Motorsports Stage 3 Ported, Polished, and Coated LS1 Heads
Stock 346 CID engine
236/230 Cam
Long Tube Headers
Muffler, Lid, and Pulleys "
This was when they were on the original owners vehicle. Since then the heads have been gone through and checked, and double checked. Additional
portwork done, to finish the smoothing of the runners, pocket ported, and the valve pocket has been ported to match the enlarged Ferroa valves.
$1300SHIPPED.
PM/EMAIL/REPLY for more info.
Located in Central Florida.
Thanks for looking,
John.
99-00 #853
Casting Number 853
LS1 (Center Bolt)
99-00 5.7L Passenger Car and Corvette (853)
01+ 5.7L Passenger Car and Corvette (241)
Material: Aluminum
Combustion Chamber Volume: 66.67cc (Milled to 57CC)
Intake Port Volume: 200cc
Exhaust Port Volume: 70cc
Intake Valve Diameter: 2.00 inches (Aftermarket 2.02Ferrera)
Exhaust Valve Diameter: 1.55 inches
Fresh from the machine shop w/ new valve seals.
921 comp valve springs(Properly seated w/ equal spring pressure)
Ferrera 2.02 aftermarket intake valves
Milled to give 11.7:1 compression. (W/ good tune run excellent on pump gas)(Was previously tuned by Jeremy Formato on original owners daily driver 01 TA)
Install info from original owners car.
https://ls1tech.com/forums/generation-iii-internal-engine/221398-rev-xtreme-stage-3-heads-xr4-cam.html
Dyno Sheet
https://ls1tech.com/forums/attachmen...chmentid=15130
Info on company who did the install
http://www.pm-fl.com/catalog/results...463fe3437de1d4
Click "Camaro/Firebird 1998-2002 LS and look for
"Ryan's 2001 Firebird 6-Speed -- 450 RWHP / 404 RWTQ
Precision Motorsports Stage 3 Ported, Polished, and Coated LS1 Heads
Stock 346 CID engine
236/230 Cam
Long Tube Headers
Muffler, Lid, and Pulleys "
This was when they were on the original owners vehicle. Since then the heads have been gone through and checked, and double checked. Additional
portwork done, to finish the smoothing of the runners, pocket ported, and the valve pocket has been ported to match the enlarged Ferroa valves.
$1300SHIPPED.
PM/EMAIL/REPLY for more info.
Located in Central Florida.
Thanks for looking,
John.
Last edited by QuickdomesticRacer; 03-05-2007 at 03:10 PM.
