First Ls
09-13-2016, 12:33 PM
#1
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First Ls Alright guys, new to the forum here. this is my first LS engine, its going to be going in a 1973 Dodge, hopefully with a t56 if i can get my hands on one without going completely broke. Its going to be a mostly street, occasional strip car. It had a stroked 500" big block 440 in it but it needs rebuilding and im tired of driving straight from one gas station to another, so i found an iron block 6.0, and a set of ls3 heads and my hope is to do a twin turbo build. So my question is about turbo choice. Ive never messed with turbos on a gas engine, but ive been around diesels all my life so im not sure how they react to certain size turbine, compressor housings, etc. I found a gt45 with these specs.
COMPRESSOR:
trim: 69
A/R.66
Inducerd: 68.7
Exducer: 97.8
Turbine:
Trim:92
A/R:1.05
Inducer:87.4
Exducer:77
The main thing im worried about is the 1.05 A/R turbine housing. I think its going to be hell to spool on the street and im wondering if they would work with a smaller housing, something like a .81 t4 housing
COMPRESSOR:
trim: 69
A/R.66
Inducerd: 68.7
Exducer: 97.8
Turbine:
Trim:92
A/R:1.05
Inducer:87.4
Exducer:77
The main thing im worried about is the 1.05 A/R turbine housing. I think its going to be hell to spool on the street and im wondering if they would work with a smaller housing, something like a .81 t4 housing
09-13-2016, 04:12 PM
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I'd like to hit at least the 700hp mark. Car won't be daily driven just every now and then and on weekends, but I want to have the option to drive it any time I want to that's why I was thinking turbos
09-15-2016, 09:29 PM
#6
There are any number of builds on this forum that you could basically copy/paste into your chassis and easily achieve your goals. Also, if you only want 700rwhp, you could still get pretty good gas mileage, as you wouldn't need a large cam. BTW, twins look cool, but are nearly twice the potential failure points of a single setup, and cost more. The only reason I would do twins over a single would be packaging constraints.
09-16-2016, 10:45 AM
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well the 700 goal is for now, i will eventually want to step up. Im just trying to start lower until i get use to how the ls engines act. i plan on going ahead and doing all forged internals so that i wont have to worry about the bottom end later, and i know turbos are a great way to crank the horsepower up, just up the boost. The car was initially a 318 small block car, and even fitting the 440 with headers in it was a challenge so space is kinda tight thats why i was looking more toward twins