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| Decking and Pumping https://slantsix.org/forum/viewtopic.php?t=3191 |
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| Author: | Tom Gilsdorf [ Fri Feb 01, 2002 8:04 pm ] |
| Post subject: | Decking and Pumping |
OK guys, I'll admit it. Before my 16 yr old dragged home his 60 Pioneer w/ a 225 SL6, I bled Chevy orange. When I started this project, I read everything I could get my hands on regarding the SL6. I'll have to admit it's a pretty neat engine and it is growing on me. Consistantly, I've read "don't deck the block" and "if you're using and electric fuel pump, always use it in series with a mechanical pump". I understand that I don't want to whomp 0.100" off the deck to pump up the compression ratio. But is there any reason not to shave off 0.005-0.010" to clean up, and square the deck surface? And regarding the fuel pump. I've got a nice little block-off plate and a Carter electric pump (5 psi, 72 gph). Running a fuel pump off the cam is parasitic loss to the engine. I'm after every hp I can get my hands on. Am I dancing on the brink of Hades here? If it's enough fuel pump to make a 350 SB Chevy go, it there any reason to fear problems with the SL6? Thanks for your feedback. Gilly 225ccr@aol.com |
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| Author: | Doctor Dodge (Doug Dutra) [ Sat Feb 02, 2002 1:04 am ] |
| Post subject: | Re: Decking and Pumping |
Quote:
: OK guys, I'll admit it. Before my 16 yr old : dragged home his 60 Pioneer w/ a 225 SL6, I : bled Chevy orange. When I started this : project, I read everything I could get my : hands on regarding the SL6. I'll have to : admit it's a pretty neat engine and it is : growing on me. : : Consistantly, I've read "don't deck the : block" and "if you're using and : electric fuel pump, always use it in series : with a mechanical pump". : : I understand that I don't want to whomp : 0.100" off the deck to pump up the : compression ratio. But is there any reason : not to shave off 0.005-0.010" to clean : up, and square the deck surface? : : And regarding the fuel pump. I've got a nice : little block-off plate and a Carter electric : pump (5 psi, 72 gph). Running a fuel pump : off the cam is parasitic loss to the engine. : I'm after every hp I can get my hands on. Am : I dancing on the brink of Hades here? If : it's enough fuel pump to make a 350 SB Chevy : go, is there any reason to fear problems : with the SL6? No problems that I know of, infact, I feel that squaring-up the block deck and getting that surface flat and clean is a "must do" when rebuilding a SL6. As for the electric fuel pump, most run the electric in series with the mechanical pump as "insurance". They have the electric wired to a switch and turn it on only when fuel demand is high. You can just run the electric pump alone but if it fails for any reason, you will be walking. DD |
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| Author: | Tom Gilsdorf [ Sat Feb 02, 2002 4:12 am ] |
| Post subject: | Re: Decking and Pumping |
Thanks Doug, I agree with you. When building an engine I have always taken a light cut on the deck just square things up. Just didn't make sense not to deck the block. As for the fuel pump, my boy has good shoes and a cell phone! I am interlocking the fuel pump with an oil pressure switch. Later, Gilly tlg225ccr@aol.com |
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