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this has been an on going project for about 10 months or so now. we finally got the turbo on and some tuning done.
the build is a built low compression 2000 4.3l with port and polished vortec heads. we used syty manifolds and a mpt70 turbo. we installed a marine intake with 60# injectors. also swaped the old style pcm for a 0411 pcm for 3bar tuning. we are currently runing 6psi. our goal is 15-20psi with meth. here are a ton of pics. i will try and label them as i go. remember this was a budget build, so we got things where we could. the marine manifold was only 199 on ebay. i took some pics of the way i installed it too.
here is a over view pic
here is a pic of the driver side manifold
this is the wastegate with its down pipe
custom intake!! yes pvc!
my wonderful 3" downpipe.
little different angle of downpipe
random pic of the manifold
extremely cheap BOV and junk yard e-fans
driver side of IC
passenger side of IC
IC piping to turbo
another angle of same part
better pic of wastegate and downpipe
this is the turbo t3-t4 adapter
this is a pic of the filter behind the inner fender area
we used the stock airbox tube to adapt to the manifold the stock thing would not stay on for anything
left over crap!!
this is the wonderful boost gauge and wideband display. this is not its final spot we are doing things as money comes in.
this one we installed the upper radiator hard line and thermostat. we did not have to modify anything here just installed it like stock.
this one is the heater core hose off the manifold with out having to drill or tap anything.
this one goes to the water pump itself. there was a plug here we just removed it and srewed in an adapter from advanced.
now this is not the final product he is going to clean some of the stuff up and relocate a few small part. like the boost gauge what not. with just 6psi it pulls hard its actually kind of amazing. its pretty cool. some of the charge pipes are from a sts kit. others came with the IC. the down pipe and exhaust is left over parts from here and there. turbo came from kbracing. the wastegate is from a used sts kit.
So you were able to use syty manifolds without modifying them? What about the cross over tube, did it clear the oil pan and power steering pump?
well at first we thought we were screwed. but then we flipped the cross over around and sure enough it worked good. we had to cut off the random metal stick that comes up off the driver side motor mount. we had to cut it down as low as we could. we also had to bend the power steering pump line that curves around the back of the pump. it was in the way of the manifold itself. later we plan to replace it with just a braided line. other than those two things it worked great.
A little update, we were playing around with a buddy with a hemi ext cab ram truck. it has longtube headers, true dual 3" exhaust, intake, tune. the silverado was running 6psi shifting at 4500rpm due to fuel pump not having enough fuel above that. when he shifted to 3rd it blew the clutch apart. funny thing is we were walking past the hemi. it was great. now he has a spec clutch, the guy said it should hold around 700-750fly wheel ftlb.
now we need to get the pump installed the 60's were at 110% duty cycle by 4500 rpm. fuel pump couldn't handle 4.3l with 6psi. pretty sad.
4.3l turbo budget build updates
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