SB2.2 Top End For Sale-->
05-11-2004 | 02:12 PM
#16
Registered User
Joined: Dec 2003
Posts: 254
From: Charleston, SC
Originally posted by SMOKNZ
46cc Chambers... Not really ideal for a turbo friendly compression ratio, but man the flow of those heads is NUTZ!
Bill
46cc Chambers... Not really ideal for a turbo friendly compression ratio, but man the flow of those heads is NUTZ!
Bill
sure you lose some quench, but the heads would make up for it...........
05-11-2004 | 03:46 PM
#18
Thread Starter
Prominent Member
Joined: Dec 1999
Posts: 2,282
The coolant passages on the deck surface are the same. The main problem with a gen 1 head on a lt1 is the oil drain back holes on the heads are blocked by the lt1 block so they need welded up and re drilled. On typical Gen 1 heads you also have to weld the outer intake coolant passages or it will dump coolant into the crankase. With the sb2 stuff you can let it circulate through the valley and then back to the radiator like the tube coming from the back of the standard LT1 heads.
05-14-2004 | 02:19 PM
#19
Registered User
Joined: Oct 1999
Posts: 448
From: DAPHNE,AL USA
Re: SB2.2 Top End For Sale-->
What springs are you running and what are the cam specs? Does it come with Lifters ?
Originally posted by Doug Harden
Very NICE SB2.2 Top End.
296cc Intake Runners
46cc Chambers
2.15 Titanium Intake Valves
1.6 Inconnel Exhaust Valves
415cfm Peak Intake flow
T&D 1.7 Shaft Mount Rockers w/ spring oilers
GM valley cover
GM Spyder Intake Converted to EFI w/ Rails
Moroso Fabricated Aluminum Valve Covers
Force Fuel Injection 2000cfm Billet Throttle Body
Moroso Carb Adapter
Cam Motion Billet Solid Roller Camshaft specs available
Lemons 2-2 1/8 step 4" collector headers fits 4th gen F-body
These heads WILL work on the reverse cooled LT1 block OR a standard gen 1 SBC.
This Top End made over 930+ flywheel hp on a 410ci LT1.
Email me at darren94z28@hotmail.com for more info and pics
Easily over $12k invested in this top end.
$6500 obo
Thanks
Darren
Very NICE SB2.2 Top End.
296cc Intake Runners
46cc Chambers
2.15 Titanium Intake Valves
1.6 Inconnel Exhaust Valves
415cfm Peak Intake flow
T&D 1.7 Shaft Mount Rockers w/ spring oilers
GM valley cover
GM Spyder Intake Converted to EFI w/ Rails
Moroso Fabricated Aluminum Valve Covers
Force Fuel Injection 2000cfm Billet Throttle Body
Moroso Carb Adapter
Cam Motion Billet Solid Roller Camshaft specs available
Lemons 2-2 1/8 step 4" collector headers fits 4th gen F-body
These heads WILL work on the reverse cooled LT1 block OR a standard gen 1 SBC.
This Top End made over 930+ flywheel hp on a 410ci LT1.
Email me at darren94z28@hotmail.com for more info and pics
Easily over $12k invested in this top end.
$6500 obo
Thanks
Darren
05-17-2004 | 10:36 PM
#22
Registered User
Joined: Feb 2000
Posts: 1,445
From: Seattle, WA
Originally posted by MrDude_1
dish the pistons.
sure you lose some quench, but the heads would make up for it...........
dish the pistons.
sure you lose some quench, but the heads would make up for it...........
How exactly does a dish loose any quench area?Dish should be in the middles of the piston face, preferably allowing increased valve lift or angle (18* say)... quench is really only the outer rim of the piston... the idea being that near TDC the quench near the outter edge of the cylinder "injects" the combustion mixture towards the center of the combustion chamber for better turbulance and combustion.
I've got a set of Wiseco pistons for my stroker with a -15cc dish that makes this much easier to understand... just wish I had pictures right now.
anyway, there is a 1/2" thick "rim" or "washer" looking form around the top edge that would be the same as a flat-top piston, but inside it has a suttle dip towards the center. The bulk of the 15cc's though seems to be the larger valve reliefs that now work with BOTH 23* and 18* heads. 
I've read that moving the center of the combustion chamber into the piston face like this also promotes a more effective quench effect, since the "injection" at TDC is done into the middle of the combustion chamber, not just at the bottom as in flat-top pistons.
05-20-2004 | 09:36 PM
#23
Registered User
Joined: Oct 2002
Posts: 1,639
From: Toledo, OH
Originally posted by Steve in Seattle
I've got a set of Wiseco pistons for my stroker with a -15cc dish that makes this much easier to understand... just wish I had pictures right now. anyway, there is a 1/2" thick "rim" or "washer" looking form around the top edge that would be the same as a flat-top piston, but inside it has a suttle dip towards the center. The bulk of the 15cc's though seems to be the larger valve reliefs that now work with BOTH 23* and 18* heads.
pistons.
I've got a set of Wiseco pistons for my stroker with a -15cc dish that makes this much easier to understand... just wish I had pictures right now.
anyway, there is a 1/2" thick "rim" or "washer" looking form around the top edge that would be the same as a flat-top piston, but inside it has a suttle dip towards the center. The bulk of the 15cc's though seems to be the larger valve reliefs that now work with BOTH 23* and 18* heads. pistons.
SRP N20/Blower 16cc dish
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