Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - L-31 compression ratio and piston type?
View Single Post
  #10 (permalink)  
Old 12-21-2009, 01:43 PM
Zeeb's Avatar
Zeeb Zeeb is offline
Registered User
 
Last photo:
Join Date: Sep 2009
Location: Mandeville, Louisiana
Posts: 107
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Understood. I don't mind buying 92 - 93 octane, nor do I mind ditching the stock pistons. I get it that new pistons are a minor expense relative to everything else, and fortunatly I'm not so budget constrained that I would have to pass on them, what with the engine out and mostly apart, this would be the time for them. I thought I was stuck with having to keep CR close to 9 points in order to use pump gas (that's what the mags seem to preach), so the factory dished units made sense once I confirmed they were hyper., but I see how the thermal advantages of aluminum heads will allow more CR. So if flat top pistons (or another design with less volume than stock) running 10:1 or so, with aluminum heads, will make for a stout, and reliable engine on 92 octane, we'll do it. It's all good. BTW, the Edlebrock top-end kit I was referring to is not fuel injected, it's simply a set of their 170cc alum. "Vortec" heads, an RPM "Gap" intake manifold, cam, timing set, and some gaskets. Edlebrock claims 435 hp on a 9.5 CR roller-cam 350 with that set of goodies installed. Plan is to have a bottom-end that will safly get the most out of my further investments (even if Edlebrock's claims are a bit idealized), and you guys are a big help. This is a wonderful forum, full of eager to help type people. I try to dig up facts before I post; if i don't do a great job of that, your patience is appreciated. Here's what me and my 15 year old son, Wesley, are up to (I'm 52, going on 18 I think). Check out the pic, you'll see in the foreground the hood of a supercharged Mazda Miata that we run on club lapping days at road courses, its looking out of my garage at an '88 RX-7 being preped for a SBC and TH2004R (yes I know the chain is not supposed to come out the front of the hoist, but it's heavily reinforced all around and I needed the extra couple of inches). Not a classic hot rod, I know, but Chevy-power none the less. This swap is popular. Check out "granny's speed shop" on line if interested. Thanks!
Attached Thumbnails
Click image for larger version

Name:	DSCN4300.jpg
Views:	114
Size:	80.5 KB
ID:	42714   Click image for larger version

Name:	DSCN4296.jpg
Views:	128
Size:	95.8 KB
ID:	42715  

Last edited by Zeeb; 12-21-2009 at 09:52 PM.
Reply With Quote