Engine will be TBI.

Thinking of using a carb intake manifold, and setting it up for direct port. Never done this before but think it would be a good project to learn something.

so carb intake manifold.



Trying to figure out where i could thread in the nozzles without destroying or truly weakening the manifold. Also want even and good spray patterns, dont want to spray against the flow of air/fuel but also dont want to simply coat the manifold walls with the nitrous/fuel either.

thoughts? suggestions? all info and thoughts welcome

 

No one has any input? Come on someone should be able to point me toward the right direction

 

set it up just as if it was converted to efi. get the spray patter right at the valve. Your not drilling 1/2inch holes here. So its not going to weaken the intake.

Are you just drilling and taping the aluminum or welding on bungs ?

Here are some examples
http://www.hotrodsolutions.net/files...lkersontr1.jpg
http://www.hotrodsolutions.net/files.../dartsbc13.jpg
http://www.hotrodsolutions.net/files...roaction16.jpg

 

Thanks for the info.

Im just drilling and tapping the aluminum.

Looking at those pictures i think i need to cut the aluminum and weld in bungs like they did so i can get the right angle. Might be a little more difficult, not a welder lol.

 

very interesting setup...TBI with a direct port. Thats something you dont see everyday.

How much of a shot you plan on spraying?

 

Well with a tbi plate 75 shot. Still researching on if the direct port system changes the amount of nitrous delivered. don't think it does think its just a more equal delivery. So ill start with 75 and move on from there.

Will be mounted on a 350 tbi

 

Looking at the manifold im thinking I have two options. Drill and weld in bungs to get the spray angle I need. Or drill the holes higher up on the runners to avoid using bungs.

Second option wont give a direct angle onto the valves but will be easier to do and MIGHT not spray directly down onto the runners. No way to tell right now.

First option has the best spray angle but im not sure if I can weld in the bungs, never welded before. Suggestions?

 

What kind of nozzles you using? Depending on the nozzle spray pattern, it may be just fine higher up on the runner and not shooting at the valve. Some i've seen spray straight out like a fuel injector, but some spray out the side, like the ones designed to be mounted infront of the throttle body on TPI cars/LS cars, LT1 cars etc.

 

Havent decided yet. Nitrous Express has a kit that looks pretty promising, about $1300 though.

The NOS kit is good also and only $800, ill probably go that way.

 

On direct port, the shot size should be the cumulative sum of all 8 cylinder nozzles. So 25 shot jet in each runner will mean 8 x 25 = 200 shot

So you need alot smaller jets for a direct port setup than what you'd need for a plate kit or single nozzle setup.

 

Dude ill sell you my complete TPI KIT, double bottle fully suported setup for $900 shipped. Worth ALOT more....

https://www.thirdgen.org/forums/powe...sion-what.html

 

Thanks for the.info I was just read that last night actually. With a tbi plate a 75 shot doesn't necessarily mean each cylinder is getting the same amount of nitrous and fuel which is real difficult when tuning

Still not sure on the nitrous and fuel herrings yet slowly learning. Any more information for me?

Patin ill be running this on a tbi set up, will it still work even though you said you kit? I've seen kits made especially for tpi with fuel injector adapters which I don't need

 

You would just need a tbi plate.

 

Williamsilvermaster@gmail.com shoot me some pics?

 

The cars acutal on the side side getting head gaskets, so ill shootem when it gets back later this week.

-Or ill see if he can send some.

 

Copy that. Well while I wait or pics ill start drillingthe manifold I got. Thinking of slapping the tbi plate kit on my current lo3. The direct port set up is reserved for the 350.

Will be interesting to see how much nitrous is delivered to each cylinder with the plate. I know its uneven but how uneven is the question.
.
And I've decided to use the NOS kit if I don't get patina kit

 

I get the car back tomorrow, so I be taking the kit off and taking pics.