First I should say hello. I own a few Z's and the VH45 might be going into one.
I've been lurking for a while but haven't found some of the info I would like to does anybody have the following?
Chamber ccGasket compressed heightQuench distancePiston to deck clearance
I want to build a NA motor so I want to up the compression and I've been following Defrag10's threads plus looking into other pistons/options myself but need more info.
ThanksIsk
Trying To Find Cumbustion Chamber CC's And Gasket Thickness etc...
Re: Trying To Find Cumbustion Chamber CC's And Gasket Thickness etc... (iskone)
Nobody knows???? Man, this a tough engine to find info on....
Isk
Isk
Re: (Mettler)
lol, thats too funny.
How is that cam stuff coming along? I'm about to go LS for my Z if I can't get any good info on the VH, lol
Isk
How is that cam stuff coming along? I'm about to go LS for my Z if I can't get any good info on the VH, lol
Isk
Re: (Mettler)
I've got a completely disassembled VH45 but I don't have any way to get measurements to do you any good. I'll see if I can borrow a set of calipers.
Re: (tmorgan4)
Oh that would be killer. I don't know how far you wanna go but if you need some help with budget cc'n let me know. I cc'd the chambers on my E88 for like 5-10 bucks.tmorgan4 wrote:I've got a completely disassembled VH45 but I don't have any way to get measurements to do you any good. I'll see if I can borrow a set of calipers.
Isk
Re: (iskone)
What's the best way to go about measuring chamber volume? Why can't we go off of the 4494cc/8 cylinders to find volume?
Re: (Mettler)
lol, that's all a matter of opinion.Mettler wrote:Lol why settle for an inferior engine?
Cams are coming along alright m8, will have some results soon.
Why exactly do you need info on the VH? It's a kickass engine in standard form, and can be seriously hotted up.
I want the info so I can build up an engine on paper and get an idea of the power, I need that specific info so I can squeeze out the most compression and get an idea of max valve lift in case I need to run custom dome pistons. I'd like to get the CR into the 11-11.5 range and run a very large and aggressive cam, my car is very light so I can sacrifice bottom end torque.
I'd love to drop a cam(s) in and make 375-400hp at the crank. But from what I can tell that's it before I have to go with custom pistons and a big bore, then it's onto porting the heads/mani and larger injectors.
I'm looking into the the LS because it's a swap that has been done already, I can buy the mounts and headers for it, I don't have to convert my fuel system if I go with a ls carb conversion, I don't want to use ANY power adders, I can make more power with less r&d (less money), I can still spin to 7,000rpm, biggest plus is no damn ecu.... for me anyway.
When I stack the 2 up side by side for the INITIAL power level I want they look real close but there is alot more time that will go into the VH build when I want to upgrade and I don't want that. In the end the ls 6.0 will make more power in N/A trim with less work, it can go to 600hp for less then $5,000 with bot ons, one step at a time.
But then again I do love figuring all that **** out and getting it perfect, LOLHmmmmm maybe I'll have to sell off my L28 from my 72' to do some crazy VH build if I end up with the ls in my 71'
Isk
Re: (tmorgan4)
When I say chamber volume I mean combustion chamber.tmorgan4 wrote:What's the best way to go about measuring chamber volume? Why can't we go off of the 4494cc/8 cylinders to find volume?
Okay, so i was lazy and just found a how to site... http://www.hydrostream.org/Art...s.htm The basic idea is to use a piece of plexiglass with a hole in it and seal it to the head with grease. Once that is done you fill the empty volume with a known amount of fluid and there you have the chamber volume. It's accurate within 1/2 a cc at least.
But I have done this a few times and it works real well. Only Instead of IPA I use Xylene (from when I was making my own high octane fuel) I also use a syringe instead of the burette, it was free from work. I've even done this to measure the dome of a piston, you could measure dish too.
Isk
yeah, last year whenever I tore down a vh and measured everything I could, someone in the shop ran off with my head CC kit, otherwise I would have measured chamber cc. Going by looks, I'd assume it is around 40-45cc, but that's just a guess from judging it by size compared to other 4v heads that have similar chamber sizes.
I have a stock VH headgasket in front of me that I just measired with a 0-1 outside mic, and the firing ring comes to exactly .070" thick uncompressed, so I'd guess between .040 and .050" compressed.
I have a stock VH headgasket in front of me that I just measired with a 0-1 outside mic, and the firing ring comes to exactly .070" thick uncompressed, so I'd guess between .040 and .050" compressed.
Re: (defrag010)
Cool, it's funny because I was just guessing and came up with the same numbers when I punched them into my DCR calc. Still would prefer something solid but that sounds REAL close to me.
Isk
Isk