4.3 Supercharged Chevy

[WizardSmokey]

The connectors on the trans is/are either the neutral safety switch, and/or the reverse lights switch. The speed comes off the ABS reluctor on the hubs.


Badass project. I love the supercharger sticking up. I can't wait to hear it shriek.

[Racer Boy]

Very cool! Thanks for the updates.

[Homeoboxter]

Pretty cool! Can we request a video of how it runs when you have the chance?

[Qingdao]

Originally Posted by Homeoboxter

Pretty cool! Can we request a video of how it runs when you have the chance?

Can't figure out how to upload here. I mean I am a cave man running a carburetor LOL


I just noticed I hadn't made any update since the little detonation party I had in cylinder 3.

To fix that issue I got some deeeeeeeep dish pistons and some forged eagle con rods. Compression should be on the high side of 9.4:1. Before the compression was about 11.1:1; thats kind of a lot for 93 octane and 8psi of boost. There is a weee bit of detonation now; only after a good heat soaking on the highway. I might be able to dial the ignition timing back a hair and fix that. I might be investing in an ignition box to control timing a little better, but for now its good enough.


Fuel ratios are a little fat. 8:1 at wot... I'd like 10:1 but I wanna get the ignition sorted before I start pulling fuel out. This is my first roots blower, and from my experience so far the heat soak is real LOL. You do a few pulls and everything is super, then the intake gets warmer and warmer....

[Homeoboxter]

Just create a youtube account and upload your videos there, very straightforward.

[Qingdao]

Originally Posted by Homeoboxter

Just create a youtube account and upload your videos there, very straightforward.

I know; to be honest its a lot of work for the 8 people interested. LOL

PM me your email I'll send you a video or two, but I'm gonna warn you my wife and I are TERRIBLE camera operators.


EDIT: oh and I think I'm just gonna live with the glowing headers at idle... I mean they don't seem to mind being that hot at idle, and if thats the ignition timing required to keep this thing from pinging then thats what it takes.

[ike84]

Question from the kid in the back who sleeps during class...can you explain the working of the nos system? What do you need the aviation fuel or 93 octane for? Does it dilute the nos? Why ethanol free 93?

Lastly, can you please rig up a sexy voice to say "danger to mainfold" every time you hit the nos?

Sent from my SM-T595 using Tapatalk

[Qingdao]

Originally Posted by ike84

Question from the kid in the back who sleeps during class...can you explain the working of the nos system? What do you need the aviation fuel or 93 octane for? Does it dilute the nos? Why ethanol free 93?

Lastly, can you please rig up a sexy voice to say "danger to mainfold" every time you hit the nos?

Sent from my SM-T595 using Tapatalk

NOS is just air. Its pure air your engine needs without all the nasty carbon. So when you dump pure nitrogen and oxygen directly into your engine it gives you a boost of available stuff to use to complete combustion. HOWEVER, it does not contain fuel; shooting just air into your engine without fuel is not so good. So most nitrous systems now use a "wet spray" mixing NOS with fuel.

Some people who use nitrous get their fuel from the pressurized fuel system. They just tap into the fuel feed line for the carb/fuel injectors. I didn't want to stress out my fuel system with a sudden drop in pressure so I just made a separate tank/pump to feed the nitrous shot with fuel.

My choice for fuel in the nitrous hit has been solidified to alcohol. My reasons for using pure alcohol fuel is because of alcohols longer shelf life than most of the stuff with ethanol in it. Alcohol also has a higher octane than the gasoline I run in the tank. And (i'm stretching here) alcohol has a higher vaporizion rate over gasoline so .... cools the rotors on the charger better.... Maybe not, but I can wish.


I can only put the danger to manifolds voice in if I put exploding bolts in my passenger's floor board. I don't think my wife would be keen on that one.

[ike84]

Originally Posted by Qingdao

NOS is just air. Its pure air your engine needs without all the nasty carbon. So when you dump pure nitrogen and oxygen directly into your engine it gives you a boost of available stuff to use to complete combustion. HOWEVER, it does not contain fuel; shooting just air into your engine without fuel is not so good. So most nitrous systems now use a "wet spray" mixing NOS with fuel.



Some people who use nitrous get their fuel from the pressurized fuel system. They just tap into the fuel feed line for the carb/fuel injectors. I didn't want to stress out my fuel system with a sudden drop in pressure so I just made a separate tank/pump to feed the nitrous shot with fuel.



My choice for fuel in the nitrous hit has been solidified to alcohol. My reasons for using pure alcohol fuel is because of alcohols longer shelf life than most of the stuff with ethanol in it. Alcohol also has a higher octane than the gasoline I run in the tank. And (i'm stretching here) alcohol has a higher vaporizion rate over gasoline so .... cools the rotors on the charger better.... Maybe not, but I can wish.





I can only put the danger to manifolds voice in if I put exploding bolts in my passenger's floor board. I don't think my wife would be keen on that one.

Thanks for the knowledge! My understanding of nos is based solely on those movies but now I understand!

Your point about alcohol is a valid one. That is one of the fundamental advantanges of WMI, the state changes of the fuel pulls thermal energy out of the intake charge and thus lowers intake temps.

Exploding floor bolts! Hah!

Sent from my POCOPHONE F1 using Tapatalk

[Qingdao]

I finally got to hear my car's exhaust... only cause I abandoned my wife on the side of the road LOL

https://youtu.be/Q30hE9SDYjM

It really does sound pretty good.