C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

86 convertable engine build

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Old Sep 28, 2015 | 02:44 PM
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Default 86 convertable engine build


Finally getting this thing back together and should hear it run within the next week . parts list
Flat top 2 valve relief std pistons
Floated the rust pins
Race bearings on rods
Polished stock crank
200 Patriot peformance heads
Milled .028" to get them to 58cc
2.02/1.64 w/Titaninum retainers
Felpro 1094 headgaskets
1.6 full roller rockers.
Comp xe274h cam
Rhodes flat tapets
Had a lt1 intake machined to work on sbc distributor and bolt pattern
52mm throttle body
Oil to air oil cooler
Canton road race oil pan
Tpis headders (which didn't fit on the passenger side without bending it )
28psi injectors
Msd 6al
New coil
Small cap hei distributor











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Old Sep 28, 2015 | 02:53 PM
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good job but get the tools off your windshield a small chip will make a big crack!!!!!!
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Old Sep 28, 2015 | 02:57 PM
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Lol yea it already has a crack high on pass side . thinking of replacing it with a lexan sheet (it's a track car only ) but have a 84 parts car I might Rob the class from if I want to keep it simple
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Old Sep 28, 2015 | 03:00 PM
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Also not sure if anyone has noticed but i moved the alt to other side and made a pully to suspend belt with the air pump (used the a/c compressor elimnator along with some 1.5" barstock bent and drilled to offer more support if anyone is interested lmk and I'll take some close up pics of the mods to do your self . much cleaner up front now
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Old Oct 6, 2015 | 09:59 AM
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Old Oct 16, 2015 | 07:59 PM
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When and had car dynoed today on a mustang dyno.
4th gear pull with the Doug Nash.
Very pleased . under WOT it's really rich like 9.5:1... So it has a little more in her but I'm ok with this for a few track days .
Now to get a real battery installed so it turns over better after it gets up to temp...
A see a stinger battery coming soon
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Old Oct 16, 2015 | 08:58 PM
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I guess its still a 350, why not stroke it? Looks really good and lord knows mustang dynos are heart breakers. I like what you did with the alternator, what kind is it? I am thinking of doing the same but switching to a lt5 power steering pump and eliminate the pulley above it.
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Old Oct 16, 2015 | 09:52 PM
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Yes still a 350 .
Stock crank and lt1 rods .
But wasn't looking to make that change .
Originally wasn't even going to dig into the block at all but after seeing it was a gm low compression short block I had to go thru it and change the pistons out to 2 valve relief hypers
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Old Oct 17, 2015 | 12:56 PM
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Like to know what it runs in the 1/4 after you run it. I did notice a few thing different from my 86.. lol, then read its a track car.
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Old Oct 17, 2015 | 06:53 PM
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According to a track app run I did (dynomaster) car runs a 11.65 @114. And it (based on that run )figured my hp @374 to the wheels... So wouldn't think it was far off
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Old Oct 17, 2015 | 06:58 PM
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Can you tell me about your alternator, which one did you use and how you mounted it.
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Old Oct 17, 2015 | 07:11 PM
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It's the factory alternator I just made some spacers and a bracket to hold it then extended the harness
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Old Feb 14, 2016 | 11:08 PM
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Our race season is about to start! The 27 I'm going to get teched for TT season. Dyno run with wideband corner scales, safety inspection. Still on stock tune and if o2 readings on the Dyno checkout it will stay that way but if not I'm headed to motivation Inc to have a chip burned to fix the fuel and the timing curve. (feel stock timing is too aggressive below 3k rpm)
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Old Feb 14, 2016 | 11:16 PM
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Old Feb 15, 2016 | 03:59 PM
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I see a whole lot'a hard work there. Congrats on a nice job. Hope u can get the tune cleaned up for race day so u can share the results.
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