I'm a road racing guy, plus, I just don't like turbos on V8's. A single turbo will lag, and twin turbos (which will stilllag, just not as much) are way too much for a street car. I'd much rather slap on a smallpaxtonand have the throttle response.

 

I will put one of my kits against a Paxton anyday of the week. IT is belt driven and won't see full boost until redline. So at 3k while you may see 5psi, I'm at 11 already. Basically that kind of blower has WAYYY more lag than any turbo.So a paxton may see 3psi at 2000 rpm when I'm at 0 vacuum and 0 boost, but I don't loose boost when the rpm lowers for a shift. I don't need 3.73 gears or 4.11's and my boost level does not depend on weather or altitude. It goes where I tell it.
Twins are not always faster on the spool. Half the kits we sell here are purely from test drives.
I don't mean to pick on you starfury, buthave you ever been in a turboed V8 ? I getthis all the time.How I need an intercooler, or you can't blo thru a carb. Or I need a box, bonnets don't work. A T-70 will spool must faster on a V-8 than a 4cyl

 

is that due to the larger amounts of exhaust gases produced?

 

Thats my guess too... I know my 408 moves enormous amounts of air out the exaust... its like a freakin leaf blower. Seems to me like with that volume of air the spooling wouldn't take a whole lotta time.

 

Exactly why. Just like tryting to spool a T88 is easier with a 514 than a 302. Properly sized turbos spool a split second after being stabbed.

 

i like stabbing, but my tranny wont let me damn c5 POS

 

Yeah, if you size even a single turbo setup properly to any engine, especially a larger one like a V8, you'll have turbo lag that's so quick you'll never notice it. If you use a modest sized turbo on a healthy V8, you may limit top end power a bit, but the turbo response will be so enormous that if you nail the gas, the turbo will be spolling and making boost even before you can get the pedal all the way to the floor. "Turbo lag" is almost a thing of the past, the earlier turbos were heavy internally and took forever to spool, modern turbos use MUCH light weight impeller/compressor blades that are made of lighter composites, specifically to reduce the lag. As long as you size the turbo(s) properly to the engine, you shouldn't have any lag. Centrifiguls ALWAYS have lag, like cpr said, they don't boost until max rpm, even positive displacement like roots and screws have some amount of leakdown that limits their ability to make boost at lower rpm when they turn slower. A turbo's ability to spin independantly of the engine speed is it's advantage, you can boost at very low rpms, and get the compressor into it's high thermal efficiency range and nearly any rpm. Race cars often have turbo lag because larger turbos are selected to make the additional top end power, bottom end boost isn't really a concern, but if you've ever seen a turbo race car that has lag, you don't really notice the lag, only how fast the car is

 

this is great topic. i know there aer charts and 10k pages worth of crap on turbos, but how does the turbo react with our 289's-429's, what would be the best for each that kinda thing.

 

cpr i know i asked you about some turbos, but i have a question that might benefit everyone, you mentioned turbo's of a supercoupe, what results would that yield and what would be the install process for the do it yourselfers?

 

I will gladly answer it, but in your own thread.I don't wanna step on this guys toes.