250 shot no direct port.
250 shot no direct port. Hey all,
I am planning to build my motor into a high compression (12:1) 402 with some tea 2.5 heads and a good stout cam for it. My goal is to make over 500rwhp thru my 4l65 and 3800 yank. I currently run a 150 with the stock motor/heads and a custom cam,etc,etc.
Anyways I am wondering what the cheapest and best way for me to run a 250 shot with the new motor. I am trying to avoid going direct port by using my existing single wet nozzle as a 100 shot for the launch and 1st gear then bring in another 150 with a 92mm plate kit from 2nd on out. Does this seem like a feasible way to do things for bi-monthly 1/8 mile racer such as myself? It may see 1/4 miles in the future.
I am planning to build my motor into a high compression (12:1) 402 with some tea 2.5 heads and a good stout cam for it. My goal is to make over 500rwhp thru my 4l65 and 3800 yank. I currently run a 150 with the stock motor/heads and a custom cam,etc,etc.
Anyways I am wondering what the cheapest and best way for me to run a 250 shot with the new motor. I am trying to avoid going direct port by using my existing single wet nozzle as a 100 shot for the launch and 1st gear then bring in another 150 with a 92mm plate kit from 2nd on out. Does this seem like a feasible way to do things for bi-monthly 1/8 mile racer such as myself? It may see 1/4 miles in the future.
At 250 you are pushing your limits with a plate setup because the atomization is not as efficient in the intake. I am putting 200 thru a plate and I think that is about the limit I would go unless it was a direct port.
All I can say is to talk to a vendor on here and see what they can help you with.
All I can say is to talk to a vendor on here and see what they can help you with.
The problem with a big hit like that is distrubution to each cylinder .
Your going to burn # 3-5 and 7 cylinder plugs faster than the rest because of the way the nitrous/fuel mixture enters from the front of the manifold.
Anything is possable tho , just read your plugs when you run it and keep a good eye on # 5 and 7 .
Your going to burn # 3-5 and 7 cylinder plugs faster than the rest because of the way the nitrous/fuel mixture enters from the front of the manifold.
Anything is possable tho , just read your plugs when you run it and keep a good eye on # 5 and 7 .
I would not go more then 200 above that your asking for trouble,your tune would have to be spot on and you have to run very low timing.You should look into getting the carb setup then if you want to keep the plate kit.
nitrous outlet, has a plate that can run over 300hp threw the manifold. Now keep in mind that you will need to watch plugs real close. They claim that they have the best flow per cyl. out there.
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I dont doubt that there nitrious outlett plate flows up to 300 hp but its the same problem of getting equal distribution in the intake is not going to happen your going to burn a piston.
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Nitrous Outlet advertises their plate will do a 300 shot with no problem. You may want to look into that.
Sorry I just saw where someone had already posted this. Here is a link
https://ls1tech.com/forums/nitrous-o...st-design.html
Sorry I just saw where someone had already posted this. Here is a link
https://ls1tech.com/forums/nitrous-o...st-design.html
Maybe that guy who answered your question over on the other site you ask this on was not so dumb afterall.
I Like how people spend all this money on new engines then try to skimp on the power adder portion
I Like how people spend all this money on new engines then try to skimp on the power adder portion
With that said, I was merely asking the question if it was feasible to do BEFORE going ahead and doing this. Since I already have the single wet nozzle it would cut down down on cost to just add a plate for another 150. Since it seems that distribution would be the issue this conversation needs to go no further. Thanks for belittling a fellow enthusiast for inquiring. Hope you feel good about it!
Put a single plane intake on, n/a it will probably be worth 20 hp up top for starters, that and there is a bunch of good options for plates that will work for what you want to do, putting that much thru a stock style intake IMO, is risky at best. Your cyl to cyl balance, is bound to be off alot more then it would be with a single plane/plate.
If you want a plate that you can split the hit up with, speedtech makes a 2 stage diffuser plate, might be something to look into. I know a couple people with those on cars, they distribute very well, are easy to set up and for sure make power.
If you want a plate that you can split the hit up with, speedtech makes a 2 stage diffuser plate, might be something to look into. I know a couple people with those on cars, they distribute very well, are easy to set up and for sure make power.
I think I am going to just build the motor for a d-1sc/f-1a. The nitrous setup has been good to me, but for the cost it is going to take to do it right for over a 200 shot, add in the effort and I could be plenty happy with a s/c which gives me the power all the time.
Plan on the supercharger setup by the time you get done with the fuel system and everything else costing you 10 grand at a minimum, becuase everything you need to do to get a 250 shot on a motor, you have to do to a motor to get it to stay together with a supercharger.
Belts aren't an issue if the system is correct. I ran a 3" cog belt system on a BB chevy for 12yrs.
Also, a Vic Jr. style intake on an LSX engine isn't any different then a small block Ford. They have always had distrobution issues with big plate systems. Carys intake is a different story.
Also, a Vic Jr. style intake on an LSX engine isn't any different then a small block Ford. They have always had distrobution issues with big plate systems. Carys intake is a different story.
Last edited by Firehawk441; Nov 9, 2009 at 05:27 PM.
A cog belt is a totally different story then the standard procharger rib belt the kits come with. Especially the way the gto kit is set up. If he wants to spend the $ outting a cog on it, that's a different story, and will for sure be more then 10 grand at that point. There's plates out there now that are set up or just that issue, and have for the most part resolved the problem. Look @ a speedtech diffuser, that plate, has very little problems with distribution.
It's not the plate that's the problem. Unequal runners is the issue. Read Yellow Bullet. There are MANY posts on this topic.
I didn't remember reading anything about a standard serpentine belt system. My bad!
I didn't remember reading anything about a standard serpentine belt system. My bad!
Last edited by Firehawk441; Nov 9, 2009 at 06:17 PM.