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need help choosing a turbo?


rusty72

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first of all i am sorry for the newb question and yes i did search but to no avail.

 

so here is my question, what turbo would i want to use on a low mileage L28et to make around 275whp? im looking mostly at efficiency. i have spent the last three hours trying to figure out compressor maps and a/r ratios and am numb. the car will be daily driven on premium 93 pump gas and intercooled. i am not too concerned with price, i dont need the best turbo in the world just need one that isnt made with 1970's technology. would like a fair compromise between price and technology.

 

thanx in advance.

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if you plan to use a stock cam then use a stock turbine. the stock cam power band matches the spool of the stock turbine very well. If you add more cam then open up the turbine to a stage 3 or 5. a stock non turbo cam is a nice upgrade for stock turbo engine (gives about 500 more rpms).

 

as for the compressor. use a T04e-50 trim.

 

use a water cooled center section because it has a better bearing.

 

external wastegate with 3 inch exhaust would run well for a 275rwhp engine.

 

plan on using 15 psi of boost to make that power with a stock cam.

 

need to add more fuel with more boost. so an aftermarket efi system will be required or a FMU.

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so you are recommending a t3/o4e 50 trim with .63 a/r. garrett has one for $600 without the water cooled center section. that is the one i was leaning towards based on the compressor maps at atlanticz.ca

 

plans WERE megasquirt II and ford edis but since pallnet is no longer making fuel rails i dont know what im going to do. i dont really want a jsk unit because i like the newer o-ring style injectors. however, from what i've read the jsk unit is a very good fuel rail and i could get over my preference of o-ring style injectors. are there any other options for fuel rails? the motor would remain stock internally with a 60mm tb and slightly worked over intake. i see alot of shaved and bored n42s being used so that likely would be my route as well.

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