I have a v8-300 in my '65 skylark and i'm very interesting in putting a Turbo in my car, is that possible? What kind of modifications do i need to do? please help..thanks :TU:
i've read it, and it's interesting but do i personally need to do specific modifications on my engine to get one of those puppys to run good?
Non-expert input Fueling will probably be your biggest problem. I would say that the first thing that you need to do is decide if you want to use the carb, or if you want to convert the motor to Fuel injection. The carbed route might seem cheaper and easier on the surface, but it's not without issues. If you go with a blow-through setuup, you'll either need to put a hat on the carb to blow through or need a box to put around the whole carb so that you can get that pressurized air into the manifold. Both systems have been done successfully, but each has their shortcomings. If you put a hat on the carb, then you will have a large pressure differential between the inside and outside of the carb, and it will probably take a lot of tuning to get your mix down right since the pressure of the intake charge will be working against the fuel pressure going in. The tuning problems will be lessened by putting a sealed box around the whole carb. Hot rod (?) did this with a big block chevy last year and they didn't have to change the settings on the carb at all to get it to run. The disadvantage here is that such a box would have to be completely sealed, and would probably have to be custom-made to your application. That ain't cheap. The other problem that you might encounter is that the carb will get pretty hot inside that box with all of the hot air. It's fine to thrash the thing on a dyno like hotrod did, but something tells me that under real-world driving conditions, vapor-lock would probably be a serious problem with the carb in a box. In either case, you would have to have a rising-rate fuel pressure regulator to make sure that your fuel pressure coming out of the carb was balanced at 5-6psi above the pressure of the incoming air. This isn't an easy thing to do, and it's an inexact science. If you aren't careful you might end up with lean conditions every time you mash the throttle and rich conditions (or even a flooded engine) every time you let off while the fuel pressure readjusts. Going with a draw-through setup is possible as well. Buick's first turbo cars were designed this way. You have fewer quirky fuel system problems with it because you are simply sucking air through the carb with the turbo. All you have to do there is adjust the carb according to the new fuel demands that are placed on the carb. There are some driveability issues with this as well because the throttle response is lessened and cold-starting can be difficult. It's also damn near impossible to use an intercooler with a draw-through so you are pretty much stuck with lower pressure boost. Converting to electronic fuel injection is a pain as well, but it is something that lends itself much better to turbocharging. I don't have time to get into too many details of the process, but suffice it to say, there is a lot of work and money involved. Once you are done with all of that, however, you have the best of all worlds. You will end up with a car that is capable of giving the engine exactly as much fuel as it needs at the boost you want to run. Great cold starts and better fuel economy tend to come along with a well dialed-in EFI setup as well. Depending on your needs, you might be able to cobble together a junkyard EFI system that could do what you wanted if you did your homework. Honestly, I think that fuel injection will probably cost you almost twice as much, and will probably take about as much of your time to implement, but I think that you get a lot for the money. - Freed
If I were going to "turbo" a 65- 300 V8, I'd find a complete buick regal with a 3.8 turbo..... Not a GN, but one of the early ones, 79,80,81.... Before they went the total "computer" route, and try to convert it over. Just my opiniono No:
Try this site Turbo Mustangs . Yeah, it's a Ford site, but there's lots of good information on aftermarket and home-made turbo set-ups The aftermarket set-ups aren't available for a Buick V-8, but you can still learn from reading the info. Browse around the forums and do some searches (chances are someone has proably asked smilar questions to the ones you'll be asking) to see if it's something that you really want to do. BTW, what compression ratio does your 300 have ? If it's already pretty high (ie. 10:1) then you won't be able to run much boost, especially with a carb.
