Forced Induction Custom FI Setup Questions

turbo sbc

Old 03-28-2015, 05:30 AM
  #1  
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Default turbo sbc

Let me start off by saying I'm not a boost newb, but this is my first non-na sbc build. With that out of the way, let me get down to it..

The motor is as follows.
-stock shortblock out of a 76 chevelle laguna
-dart iron eagle 72cc chamber heads
-small crane cam (.484 lift with my 1.6 rockers)
-edelbrock rpm air gap
-edelbrock 600cfm carb with neoprene floats and choke horn shaven off
-greddy 28x13x3 front mount
-GT45 turbo
-knockoff tial wastegate and bov
-3-1/2" downpipe into single in, dual 2-1/2 out modified flowmaster ('louvered' the center baffle, so it's basically a straight through now)
-modified midlength headers to 2-1/2" hot side exhaust

I think that should relatively cover it.. the cam is subject to change within the next few months.

Just wanting to see if there's anyone else out there feeding boost to a stock (as in factory stock.. yes, cast pistons) sbc shortblock. If so, how much? I'm guessing 8-10lbs on premium pump gas should live happily, provided it's fed enough fuel. Pistons are factory dished with valve reliefs, 72cc chambers and .051 thick (compressed) gaskets. And also, round-about where did you set your base timing? Thinking of using 1 heat range cooler plugs, to help combat any chance of detonation.
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Old 03-31-2015, 01:28 PM
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The main thing is to keep it out of detonation. You will want something that can maintain timing correctly under boost. What are you using for timing control?
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Old 03-31-2015, 03:14 PM
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Right now, stock hei vacuum advance distributor with an accel supercoil that's old as dirt.
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Old 04-02-2015, 09:05 AM
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You'll need to add something to back the timing off under boost.
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