cadmaro

Ive been searching here and on google and cant find much information on this turbo and im trying to decide if its the right size for my 4.0 jeep i6. the turbo was givin to me and im told is the stock turbo from an 87 t-type regal. i would gladly do my own calculations if i could find a compressor map for this crazy thing. lol. Im hoping to run around 5-6 psi and start boosting at as low an rpm as possible. if i missed something in my searching just show me where to go and ill do my own reading and whatnot or if you just have a straight answer for me thats cool too.

cadmaro

So no one has anything to say about this??

whitneyd

I would say that it's probably a good turbo for just 5-6 psi. The v-6 in the regal was smaller than the 4.0 so you can spool it really easy.

cadmaro

Thanks for the reply . i found a compressor map and was playing calc that plots a graph on it but im not sure if im doing it right. here is the map i got

cadmaro

well it seems that didnt work. why did it block the name of the website?

whitneyd

Can you email that to me at david.whitney@aviano.af.mil.

cadmaro

email sent. The part im most confused about is how do i know the ve of the engine at a given rpm and also how do i know when the turbo will start to spool and when i will hit max boost?

whitneyd

It's hard to say on the spool time but most articles will tell you to use 80% VE. Try this site Turbocharger Compressor Calculations

cadmaro

with the info you gave me im showing air temp to be around 170 on a 90 degree day and my plotted line goes straight up the middle of the map until max boost at which point it goes straight over and hits the choke line right after max power ( based on n/a max power im assuming) does this mean the turbo is actually to small?

whitneyd

I"m sure it's not the ideal turbo for your engine but when your trying to build a budget system you might have to sacrifice a little here and there.