Syndicate Posted March 25, 2007 Share Posted March 25, 2007 Just bought an engine. Guy tells me that it should make somehwere near 550hp on motor and should be able to handle a 200hp shot all day long. I payed $1,800 or it. So I feel I got a deal anyways. What do you guys think? Here's what I know about the engine. I know this motor put a 3200 lb Chevy II into the 10.80 range in the 1/4 on motor alone. 406 SBC 13.1 comp Vortec 64cc heads Victor Jr. intake manifold Forged crank Forged rods Hyperpunetic pistons High idle camshaft...I don't know the specs on it yet. Quote Link to comment Share on other sites More sharing options...
HICKL Posted March 25, 2007 Share Posted March 25, 2007 I don't think your hyper pistons will handle a 200 shot of NOS, some of you experts feel free to chime in. Jeff Quote Link to comment Share on other sites More sharing options...
lbhsbZ Posted March 25, 2007 Share Posted March 25, 2007 With stock vortech heads, I think 550hp is out of the question....and without forged pistons, I would shy away from nitrous. 13:1 will not run on pump gas....start shopping around for some 110 or 113 octane fuel. Not sure what a high idle cam is...try to get some specs. Quote Link to comment Share on other sites More sharing options...
Syndicate Posted March 25, 2007 Author Share Posted March 25, 2007 Tearing the motor apart to install better parts isn't a problem. I'm just wanting to know what I'm working with and if I got a good deal on it. What numbers HP wise should I expect? And how much nitrous can a run through his thing? Quote Link to comment Share on other sites More sharing options...
lbhsbZ Posted March 26, 2007 Share Posted March 26, 2007 Without seeing cam specs, and knowing valve sizes/valve springs rates, etc....it looks like the engine is put together with a bunch of mismatched parts. Before I go anywhere near that C/R, I would have a good set of Brodix or AFR heads on it with 10:1 compression. And unless this motor has a blower on top of it, I don't see how it would push a 3200 lb car much past the 13s, let alone 10s. Vortec heads are good for about 350 HP (on a good day) out of the box. You really need to tear it all down and see exactly what is inside...CC the chambers and ports on the heads, measure the cam (or try to figure out what it is based on the any numbers that might be on it), you need to see what you're dealing with. With 13:1 C/R and cast pistons, I wouldn't use nitrous at all. Quote Link to comment Share on other sites More sharing options...
Syndicate Posted March 26, 2007 Author Share Posted March 26, 2007 Thanks guys, these are the answers I was looking for. The heads have concerned me greatly on making HP. Will using a good set of aluminum heads hurt me on the nitrous end? If I tore out the pistons and installed some forged ones. Which kind should I use? I woud really like to use that new ZEX plate kit that just came out. I am trying to keep a low profile intake up there hence the reason for the victor jr. intake. If I can get 600hp on nitrous I do belive I can get my Z32 in the 10's. Quote Link to comment Share on other sites More sharing options...
lbhsbZ Posted March 26, 2007 Share Posted March 26, 2007 If you are intent on running Nitrous, I would get some flat top forged pistons...about 10:1 compression. If the block was honed for cast (or hyper) pistons, you'll need to open the bores up a little more for forged pistons. Make sure the rods and crank are up to snuff, and do your homework before buying/building anything. Read some books on performance engine building, talk to the guys at ZEX, and talk to the fast guys at the track to get the names of good machine shops and talk to them. Making 600hp is easy....making it more than once can be difficult if the right combination of parts is not used. Quote Link to comment Share on other sites More sharing options...
280zwitha383 Posted March 26, 2007 Share Posted March 26, 2007 I have to absolutely disagree that vortec heads are only good for 350hp. That said, they're not what you're looking for definitely. Roller cam? (with vortec heads) Same except with AFR 190 heads (I think they've come out with newer ones but just for comparisons sake) According to the flow charts I have, both heads peak at 500 lift so this should be right on I think Quote Link to comment Share on other sites More sharing options...
TheNeedForZ Posted March 26, 2007 Share Posted March 26, 2007 that's a pretty neat program. Is it expensive? does it support other engine types or just GM/Ford/Domestic? Oops, thread hijacking... Quote Link to comment Share on other sites More sharing options...
280zwitha383 Posted March 26, 2007 Share Posted March 26, 2007 It has 7 domestic engine categories (chevy,ford, buick, olds, etc) and 14 foreign engine categories including 2.4, 2.6, 2.8 datsun engines, lambo, mercedes, VW..... The only real problem you run into is not having the flow charts for heads you want to try and not having all the info on the cam. Regardless, it's a good tool to use if you're getting started so you kinda know what changes do what. http://search.ebay.com/desktop-dyno_W0QQfkrZ1QQfromZR8 Quote Link to comment Share on other sites More sharing options...
icewtr Posted March 26, 2007 Share Posted March 26, 2007 As for the comment on hyper pistons not taking 200shot of NOS.. that's wrong .. I have those pistons and i now have a 200 shot on my car thats not jetting that is actual dyno at the wheels more power.. we have had 400 shot on hyper pistons.... and not for 1 run so far i am 4 .. 10 lbs bottle's into this ... the secret i was told with nitrous is take away the timing .. a nos knock with timing melts pistons .. without the timing it melts a plug.. seems to work so far.. and we don't even wanna talk about the 200 shot i had on the cast pistons.. tune the car right and ya can run most anything .. for how long that is the real question .. and who said vortec heads are only good for 350 hp .. my motor came with those heads and started with 425 or so at the crank.But hey thats just my 2 cents.. and that engine dyno program is not that close to real world.. but it is fun to play with .. just don't build a motor based on one of those ya will be unhappy with the results Quote Link to comment Share on other sites More sharing options...
Guest zfan Posted March 26, 2007 Share Posted March 26, 2007 The difference between forged and hyper pistons is forgiveness. The hypers will go boom if you even think about a lean spot or detonation. Vortech heads are pretty good but not so much on a big cubic inch small block. AFR, Brodix, Dart Pro 1's, Victor Jr.'s or Canfields will work great but only if your budget allows! Good luck with her. Quote Link to comment Share on other sites More sharing options...
grumpyvette Posted March 27, 2007 Share Posted March 27, 2007 280zwitha383 can you explain how you post that dyno chart from DD 2000 software?????? Quote Link to comment Share on other sites More sharing options...
boodlefoof Posted March 27, 2007 Share Posted March 27, 2007 Before you go pulling it apart, I would run it and see how it does. Are you certain you aren't mistaken about that compression ratio though? Quote Link to comment Share on other sites More sharing options...
lbhsbZ Posted March 27, 2007 Share Posted March 27, 2007 I guess I'm mistaken then about the heads and the hyper pistons. I'd be curious to see some REAL dyno charts on the engine. Quote Link to comment Share on other sites More sharing options...
280zwitha383 Posted March 27, 2007 Share Posted March 27, 2007 280zwitha383 can you explain how you post that dyno chart from DD 2000 software?????? NP. This will work with anything on your (whole) screen. Hit Ctrl and Prt Scrn at the same time. This puts the image in your clipboard (same as clicking copy on text or pictures). Then open up a program (which can edit pictures) and paste it into it. I use powerpoint or OpenOffice's Impress. With Powerpoint I think you click File, save as, then in the save as box it says extension which you change to JPG. In Impress you simply right click the image and hit save as picture. Open Office is a free (yes free) alternative to Microsoft Office. You can keep all of your files the same format as Microsoft Office if you'd like. Plus the controls are very similar also. If that doesn't work tell me and I'll make sure about the Powerpoint. If you drag the picture out a little bit on powerpoint it will save the image bigger than the ones I posted which are marginal. You could also do this in Paint for that matter. Just make sure you change the extension to jpg when you save it otherwise it will save the image as a bitmap and it will be a few mb's as opposed to 100kb or so. Quote Link to comment Share on other sites More sharing options...
Kechup Posted March 27, 2007 Share Posted March 27, 2007 Before you go pulling it apart, I would run it and see how it does. Are you certain you aren't mistaken about that compression ratio though? Thats not a bad deal, you got what you paid for, i dont see 550 but i do see 450 easy. You never know till you hit the dyno. Quote Link to comment Share on other sites More sharing options...
Pop N Wood Posted March 27, 2007 Share Posted March 27, 2007 NP. This will work with anything on your (whole) screen. Hit Ctrl and Prt Scrn at the same time. This puts the image in your clipboard (same as clicking copy on text or pictures). Then open up a program (which can edit pictures) and paste it into it. I use powerpoint or OpenOffice's Impress. With Powerpoint I think you click File, save as, then in the save as box it says extension which you change to JPG. In Impress you simply right click the image and hit save as picture. Open Office is a free (yes free) alternative to Microsoft Office. You can keep all of your files the same format as Microsoft Office if you'd like. Plus the controls are very similar also. If that doesn't work tell me and I'll make sure about the Powerpoint. If you drag the picture out a little bit on powerpoint it will save the image bigger than the ones I posted which are marginal. You could also do this in Paint for that matter. Just make sure you change the extension to jpg when you save it otherwise it will save the image as a bitmap and it will be a few mb's as opposed to 100kb or so. There is a program called SnagIt that will let you do screen captures of just a particular window. Quote Link to comment Share on other sites More sharing options...
280zwitha383 Posted March 28, 2007 Share Posted March 28, 2007 yeah, there's a slew of image capture programs. Just type "free screen capture" into google and I'm sure you could wade through all of them for a substantial amount of time. That's just the way I do it because you don't have to have additional programs and I am somewhat of a minimalist. Quote Link to comment Share on other sites More sharing options...
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