73-87chevytrucks.com
73-87 Chevy _ GMC Trucks => Performance => Topic started by: 1979C20 on June 12, 2014, 11:10:17 PM
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So here is the motor in my Suburban. http://www.jegs.com/i/GM-Performance/809/19210007/10002/-1?parentProductId=1231165
The only thing that isnt the same on this motor is the heads. It has the stock TBI heads on it. Im tracking down the parts to turbo charge it, either a 76mm turb or two smaller ones, not sure what I can get ahold of yet. Im just curious, what would you recommend for max boost on the internals listed.
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you can get a better motor for 3k
https://www.yearone.com/Product/1967-87-chevy-gmc-truck/ct350pc1
Year One Power Crate 400hp 350 crate engine assembly.
Engine Specifications:
* Horsepower: 400+
* Torque: 400+ ft/lbs
* Compression ratio: 9.7:1
* Dyno-tested: Yes, includes 8" balancer & 14" flexplate
* Dyno sheet: Included with engine's output
* Vacuum produced: 12hg @ 800RPM
* Recommended fuel: 92 octane
* Max recommended RPM- 5800
* Block: Seasoned 4-bolt iron
* Crankshaft: OE cast iron
* Pistons: Hypereutectic
* Connecting rods: Powdered metal
* Camshaft- Hydraulic roller with YearOne proprietary specifcations
* Rocker arms: Stamped steel 1.6:1 ratio
* Cylinder heads: Ported Dart Iron Vortec
* Valves: Stainless steel 2.02 int/1.60 exh
* Valve springs: Heavy duty
* Bore x Stroke: 4.04" x 3.48"
* Intake manifold: Dual-plane aluminum
* Oil pan, timing cover, valve covers included
* Engine fasteners: High tensile strength
* Warranty: 12 mth/12,000 mi
i dont know anything about turbos
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Irish, that motor I listed is the motor that is already in the truck from when I bought it.
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lmao oh my bad, continue on then.
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Can anyone chime in on mac recommended PSI? I was thinking 7 pr 8...
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What's the compression with the TBI heads?
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I believe 8.75:1, but it could be 9.1:1. TBI heads cam with either 64cc or 65cc chambers, so im not entirely sure. How could I test? Compression test?
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That motor is 9.1:1 if it is identical to what you posted. How do you plan on turboing it? What are you doing for fuel delivery?
I would cap it at around 5-7 to be safe.
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I know I need a larger fuel pump, and I was planning on a vacuum fuel pressure reg.
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I found a AR.48 t3 turbo off a 88 tbird. Im curious if this would alright?
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Two of them would be the beginning of something, one? No way!
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Ditto. and if you want to feed them carb fuel you need to talk to Lorne.