I have a 1990 camaro rs the 3.1L v6 and i would like to turbo charge it. would i be better off setting up a single or twin turbo. i am goin to get the turbos from a junkyard so is there any certain cars i should look for? do i need to have and intercooler if i do this? thanks for the help

 

Wait it out, as Vortex Performance finishes up design/testing of a turbo kit first for the '86-'89 2.8s, then the '90-'92 3.1s...

 

any idea when this is going to occur....i will be doing an engine rebuild on my 3.1L this fall around september and will be wanting to turbo it in the process...think it will be done by then?

 

As far as turbo charging it.
Depends.
If you want mad low end boost, go twin. But they have to be small turbos.
If you want mad top end, go single large.
If you want mid-upper a propperly set mid grade turbo will do wonders.

Ok heres a few calculations for selcting a turbo, compare the final numbers to the t's flow map.

to calc air flow rate.
CID(Cubic inch Displacement) X RPM (you better know what that is) X 0.5 X Volumetric effientcy (typical 85) NOT UNDER BOOST that devided into 1728

example... 302X5500X0.5x0.85/1728 = 408 CFM

This will tell you what CFM your engine is pushing, and what turbo it can support. Obviously if your engine cannot make boost untill 3000 RPM the turbo is too big.

Now the Volumetric effientcy can be replaced by the Boost ratio once the engine is under boost. The formula for that is...
14.7+Boost PSI/14.7

Example... 14.7+5 = 19.7 / 14.7 = 1.34 PR

So your numbers under NA would be lets say (from examble above) 408 CFM Now apply the new Ve to it at 5 PSI would now be 546.72 CFM. 408 X 1.34

I won't go into density tables.

but that is the general idea. Got o google and search for "turbo flow maps" and you should reach a few sites that advertise them. You want a good 5-8 points of flow to compare to the map. You do not want to go below 65% efficiency cause then you are seriously hendering performance. Once you look at a flow map you will see what I mean.

 

Mid range power is where we're doing the kit for. It'll be done by september, no doubt... Should have the SD setup tweaked by then, too, for the 90-92' guys!

 

any idea on the price range yet....need to know how much money to save up over the summer haha

 

We're thinking of running an intro group-buy, like 3-5 @ $2300 apiece.. after that, around $3200 for the entire kit.

 

hmm....not to bad really. keep me posted on the progress, i know a couple other people are doing it as well so ill be comparing. i cant wait