right now all my mods are in my sig. Car runs very well. Will be changing valve seals and getting non platinum plugs to. My question is will i be safe with a 50-75 shot on my car with 110k miles? New valve springs will also be going on with the valve seals. coil, cap, rotor is all good and right now everything is in good working order. I hope to be swapping in a 350 soon but i dont think it will be this summer tho. Think i could get away with alittle n2o for now? I need something to outrun a few lightly modded 5.0s.

 

just make sure the nitrous kit you buy is not a generic EFI kit but a kit that was designed just for TBI cars.

 

I plan on buying Nitrous Oxide Systems kit #05153 which is designed for TBI...550$ kit tho.

 

That is the kit that I have.
Before I changed the heads/cam/intake/tranny on my car I was running a 100hp shot on my 305 TBI. A just made sure that my ignition and fuel systems were in good working order. I also got an MSD digital 6 to retard the timing when running on nitrous.

 

you have any times with that setup? id say it should be some pretty good times for the 305. I may go the route your going im not sure yet. Either go ahead and buy world heads or keep saving for a 350....Im not sure yet. I just want a mid 13 second car and i dont care if it takes n2o so i dont need a 350...

 

No times yet. I am still trying to work out all the bugs. Runs way too rich at idle and lean in the upper RPMs. It needs a custom chip. I am going to try to use a vacuum AFPR as a temporary fix.

 

what are the specs on the zz4 cam?? better than the LT1? a cam swap is my next upgrade but i really dont want to buy a used cam. Main reason is i dont trust people...Ill end up getting a cam off ebay and it will be worse than the one i have...Yeah id say you definetly need a chip...what msd box did you get? I may do that before n2o just in case.

 

The ZZ4 cam is 208/221 .474/.510 112 @.05 duration. So it is quite a bit larger than the LT1 cam. The idle is kinda rough.

I got the MSD digital 6. Its a little expensive, but I think it was worth it.

 

Doesn't www.sdpc2000.com sell the zz4 cam?? Yeah I found it. 175$ I may order that soon. Hows the computer like it??

 

The computer will run alright with the cam. However you will need a custom chip to make it run well. I have the timing set at 8* advance. At idle it runs so rich and I think it leans out above 4000 rpm. But you could get around on the stock chip.

 

Would a dry-shot work with TBI at all? I saw an LS1 tonight that had the injectors mounted in the airbox that houses the airfilter. He had them mounted right after the filter.
I was thinking it could be possible to just mount them in an open element if this could be done to our cars. I have TBI, and was planning on running a performer vortec intake and didn't know if the N2O plate and the TBI adaptor plates would go together at all. Also, I am trying to fit this under the stock hood.
Oh, I am working on a '68 327 with vortec heads and the performer vortec intake. I was planning on using the stock rods, pistons, and crank with this, with some stronger rod bolts.
Due to the stock bottom end, I would surely stay below a 100-shot. I would possibly have to go with the 350 injectors if I chose the nitrous route because I doubt I could get enough fuel with the 305 injectors I have now.
I can't afford to add N2O, but I am just looking at options in case I come across a cheap setup for it.

 

JR305...Youve done everything to the 305 that I was thinking about doing. Ive even considered the t56 swap cause I think my 700r4 has seen better days. Did your car start as an auto or manual?

 

What kind of gas milage are you getting with the T56 and the 4.10 rear? What kind of RPM's at say 75 on the freeway?? Do you by chance have any times for your setup?

Thanks
Bill

 

TZFBird.... I don't think that a dry shot would work, I doubt the computer would be able to compensate for the nitrous. I am running the plate system from NOS, it is about 1/2" to 3/4" thick and should bolt onto the adapter plate. The only problem would be the fitting it. You might be able to run the NOS top-shot system, although I think it was designed for carb but you could probably adapt it. 91Bird305 is selling his TBI nitrous kit, he would probably give you a good deal.

TBI305Camaro...My car started as an auto. It was by far the most expensive thing I have done to the car. The swap is not that hard, took two nights.

BillD91RS... With the 4.10 gears I am pulling around 2200 at 75. The gas mileage is horrible right now because of the stock chip. It runs so rich, below 2000 rpms. No times yet, but once I get the chip I will take it to the track.

 

What do you mean that the computer would not be able to compensate for the nitrous? I don't see how it's any different if you add it before or after the fuel. Also, the ones that are for the carb look like they are almost the same as what I was going to do. From the looks of the pictures on the Holley websire, and Summit. It is exactly what I was planning only a little bit different.
I was thinking of just mounting 2 nozzels on top of the air filter cover, so that when the filter cover is put on correctly, the nozzels are pointing straight down the 2 TBI boars. Of course, I would put them off to the side and at an angle so they are not shooting the injector pods. Not sure if that would work at all though. It would probably be smarter to just go with your plan and put it under the adaptor plate.

Also, I doubt he could give me a good enough deal on his system so that I would buy it right now. I can't afford anything. Especially since I have to buy a ton of other stuff, and am not working during school. (at least not right now.)

This is mainly brainstorming at this point.

 

What I meant was that a dry shot only injects nitrous, no fuel. It relies on the cars fuel system to compensate. A wet kit injects nitrous as well as fuel.

 

YZF BIRD:
i ran into the same problem, didnt want to put down the cash for a plate. i called NX, and luckily had a guy who had a 305 TBI on his truck. he tapped holes in the ring between the air filter housing and the TB, and took two nozzles, and just put them right next to the injectors pointing down. to use two nozzles and run just 2 solenoids, just tee off the solenoids into two feed lines.