need help! turbo virgin!

flattop9 · Tweet this Post! #1 (**permalink**) 10-24-2010, 07:02 AM

Hi, new guy here.Looking for advice on whether to try a turbo or not. I have a g-body drag car that weighs 2400 lbs,small block 408. its time to freshen motor and i am at a cross road turbo,or nos for a power adder.I have never done any performance turbo work and do not know where to begin.any advice that would start me off in the right direction would be great. thanks,mike

Robert · Tweet this Post! #2 (**permalink**) 10-25-2010, 08:46 AM

Quote:

Originally Posted by flattop9

Hi, new guy here.Looking for advice on whether to try a turbo or not. I have a g-body drag car that weighs 2400 lbs,small block 408. its time to freshen motor and i am at a cross road turbo,or nos for a power adder.I have never done any performance turbo work and do not know where to begin.any advice that would start me off in the right direction would be great. thanks,mike

First thing we would need to determine is how much power you currently make and how much you are looking to make.

flattop9 · Tweet this Post! #3 (**permalink**) 10-26-2010, 03:00 AM

Quote:

Originally Posted by Robert

First thing we would need to determine is how much power you currently make and how much you are looking to make.

the motor made 491 rwhp, 60ft @1.34 and runs a10.10et @ 129.7 1/4 mile. the car is certified for 8.50s. i would like to run the car in the 8.80s but still retain the 275 dot tlre if possible.thanks for the help.

Robert · Tweet this Post! #4 (**permalink**) 10-26-2010, 08:59 AM

Quote:

Originally Posted by flattop9

the motor made 491 rwhp, 60ft @1.34 and runs a10.10et @ 129.7 1/4 mile. the car is certified for 8.50s. i would like to run the car in the 8.80s but still retain the 275 dot tlre if possible.thanks for the help.

So based on your cars current numbers and your knowledge of the chassis, gearings, trans, etc, how much more than 491 do you think you need to accomplish that goal?

flattop9 · Tweet this Post! #5 (**permalink**) 10-26-2010, 12:14 PM

well there are so many variables in the mix, such as engine cubic inch,turbo size,primary exhaust size,cam lobe center,heads,fuelinjection or blow thru carb,chargeair cooler,transmision,converter,gear ratio,vrt turbo,liquid cooled turbo. where do begin? to answer your question about 300 more hp?

Robert · Tweet this Post! #6 (**permalink**) 10-26-2010, 12:22 PM

Quote:

Originally Posted by flattop9

well there are so many variables in the mix, such as engine cubic inch,turbo size,primary exhaust size,cam lobe center,heads,fuelinjection or blow thru carb,chargeair cooler,transmision,converter,gear ratio,vrt turbo,liquid cooled turbo. where do begin? to answer your question about 300 more hp?

For 300 more HP you are looking to need about 850-900 CHP of air factoring in drivetrain loss. I would probably look at a single 76mm turbo like the GT-K 1000 or a standard T76 with an F1-68 turbine wheel. That turbo is good for about 1000 CHP of air and should easily get you there. If you want to run twin turbos a pair of GT-K 650s or standard T66 turbos with either F1-65 turbines with a larger A/R or F1-68 turbines with a smaller A/R would do it.