As i sit here pondering what I'd like to do with my Riv, I can't help but wonder what would be best for my situation. Current Engine: Rebuilt 72 455 Block, 10:1 Forged Pistons, Oil Mods, Stock Rods w/ARP Bolts, Lightly Ported Stock Heads, Edelbrock Performer Intake with Holley Carb, a TA 288-84H cam, and stock manifolds. When I get home from deployment, my 72 Riv GS will become my daily driver as i soupe up my 06 GTO. I have no idea what kind of power the engine makes, as i have yet to drive it, and was originally going to fuel inject it, turbocharge it and throw and overdrive trans into it. But, i don't know if that turbo would be overkill on this engine. I want to make, at most 550hp at the crank, so i think a single turbo wth low boost could do that easily. And with fuel injection the addition of a turbo wouldn't make such an impact on gas mileage until i romp on it. But, the extra power will require extra fuel so I don't know if i would be better off just getting a nitrous sytem to use when and if i ever want that extra power. Definites: Retrotek Powerjection III Fuel Inj System Built 200R4 with Lock UP converter So, what do you guys think? Turbo on low boost or nitrous? Also, any ideas on what kind of horsepower the engine is currently making?
the turbo system would be cheaper in the long run turbos, like a 4barrel will actually improve gas mileage when youre not in it..but when youre under boost say goodbye
what to do, what to do. Race car? Use nitrous. Driver? turbo. Seems like your compression ratio is a little high for turbo, except maybe low boost. Good thing about a turbo for you would be the power you would always have access to. Not just when the bottle is open and ready. Just my humble, worthless opinion. We will be adding nitrous to the 70 Skylark before next season, and building a turbo motor for the other car. The GN is alread turbo, so we will have some of each.
yes it would, and oops didnt even seem the 10.1 cr thats mean youre kind of limited to about 6spi maybe 8 with alki injection and or intercooler
If it wasn't so expensive, I would've gone with a Procharger setup. But, I was going to build my own turbo system and i priced it out to about 1700 and that includes all the hot pipe fab work i would need someone else to do for me.
As far as the C.R. goes, i was going to get some thicker head gaskets to lower it a little along with some head studs to keep things tied down under boost, but again, I'm pretty sure 6-8lbs would be fine on even a 10:1 motor, espcially since I'll be using fuel inj.
You can get Commetic head gaskets VERY thick although your intake will need to be modified to match. You will want to either swap out pistons if you go Turbo in my opinion unless you can get down to 9.5:1 or less. I say add a block girdle, get the compression down to 8.5:1, intercool it and run 14 psi of boost as well as a 100 shot of nitrous to help keep things cool! Nitrous comes out VERY cold.... I am using it on my turbo engine since nitrous and turbos are like butter is to bread!! Can you say 900 hp+ street car?
Sean, Sean, Sean. You and your huge HP numbers! I say, get a nitrous kit and have at it. You can have some fun for now, and start pulling the parts together for the turbo build.
Here is a good comparison for you, this guy used a 10:1 engine beefed it up a bit and added thicker head gaskets to get him down to 9.3:1 then added 12 psi of boost: Update here: Add Turbos, intercooling and a few more PSI and you would have quite the beast!
Don't get me wrong, I would LOVE to go for the big power numbers, but that's not what I bought this car for. I bought this for cruising and going to and from work. A 500-550 hp car is just about at the edge for what i would consider a daily driver and the only reason I want that much is because my GTO spoiled me. So now every car i drive has to be at least that fast. Besides, to tell you guys the truth, if I wanted to go for big horsepower numbers, I'd use an LS motor, since they're proven to be reliable at those levels. Even with all the band aids for the 455, its still luck of the draw keeping one together and for the price of just the aluminum 455 block i could have a forged LSX short block motor capable of handling 1000+ hp.
Perfect if you make about 400 hp NA then you only need a small shot of nitrous or a few psi to meet your goals.
For just a daily driver and only wanting 550 max, just stick with the nitrous unless your dead set on boost. Trust me, ive procharged a buick 455, and now a turbo lsx motor. You can buy a complete nitrous plate kit with all the safety stuff for around $500, a turbo will go much more than that. My turbo, wastegate, and blowoff valve cost $1300 allone. Add in whatever manifolds youll use for the turbo, blow through carb, fuel pump, piping, intercooler, etc etc and itll end up getting costly. But in the long run just do whaever you like and what you want, i could have saved alot of money on my last two motors by just using nitrous, but ive gotten addicted to boost and love having the power on tap and never running out...i do race my car usually twice a week, and is a daily driver, but we all have our own interpretations of a dd or street car
I went the Nitrous route first, then ended up going boost about 6 years ago... Nitrous can get to be a pain in the butt to fill up all the time. It's nice to always have boost on tap......
Well, if i go turbo, i was planning on going with a single. I'd rather do duals but i don't think i can fit them without removing the a/c. Has anyone done dual turbos and kept the a/c? Where did you put the passenger side turbo, where the battery is? Also, I was looking at using a Holset HX40W for my single application, has anyone had any experience with this turbo?
Except that there are many advantages of Twins if you can fit them. More efficient routing, quicker spooling due to two smaller turbos vs one larger one ect.
