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    4200 cams - Bullet cams

    Call and ask......
  2. E

    4200 cams - Bullet cams

    What 4200 cams - call bullet cams - they are spendy but add a ported head and cams + good exhaust == 400HP NA.
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    4200 Manual Transmission Flywheels - group buy

    4200 flywheel These were never releases by GM. The ring gears are not available in USA. This is your chance to get a MT flywheel.
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    Abandoned, 2007 Envoy 4.2 Turbo Build

    Capote " It is confirmed to handle 17Ibs stock. I'm aiming for 400+ as well. So you're gonna have some forged internals made up? I'm not going down that path, only due to how expensive it is, since nobody makes anything aftermarket for this engine (internally) unless requested by someone.?"...
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    Need engine: Pull from PickNPull or Buy already pulled?

    The fittings I designed use AN-8 hose.
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    Need engine: Pull from PickNPull or Buy already pulled?

    The 02 - 05 cranks were fully counter-weighted, I got lucky the end of the 05 production service cranks were cross-driiled - they were testing the setup for the 06 up cranks. Yes you can get any 02-05 crank cross-drilled. Direct feed - I designed and had made special fittings to feed oil into...
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    Need engine: Pull from PickNPull or Buy already pulled?

    Thanks I'm running 7/16 ARP studs with a billet crank girdle plate instead of the factory halo. The main caps are hollow doweled the plate - which is tied to the side of the block using the pan bolts. Next time I have the engine completely down I'll dowel the plate to the side rails also...
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    Need engine: Pull from PickNPull or Buy already pulled?

    Rod bearings combination of dynamic rod bearing loading + better oiling - changed to a cross-drilled 05 crank + direct feed the main oil gallery externally from the oil filer output. I'm aware of timeserts. If I could get them at a decent price. Using heli-coils - I'll stack 2 or 3 to get...
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    Need engine: Pull from PickNPull or Buy already pulled?

    I've been running ARP studs in my turbo'ed 4200 for 8 years now. These are 1/2" head studs. The engines been apart several times over that period for issues with rod bearings (initially) and a blown up compressor wheel that sent metal through the engine. The studs are torqued to 95 ft/#. The...
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    Abandoned, 2007 Envoy 4.2 Turbo Build

    After breaking for than 1 4L65 with a lot of good internal parts I gave up on them and installed a 4l80. No more issues, even at 640 ft/lbs (wheel). The '65 was ok upto 550 ft/lb torque. Mind your this was 5 years ago, since then the aftermarket has solve the direct clutch capacity issue - no...
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    Abandoned, 2007 Envoy 4.2 Turbo Build

    If you have the head off .. port the exhaust and intake Then convert the head to run a 3/4" reach flat gasketed spark plug - there is a much wider variety of heat ranges available. This is easy to do on a bridgeport type mill using a suitable 4 flute end mill.
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    Cam shaft

    The stock exhaust port flow stalls at 160cfm @28" water pressure. This occurs close to 0.300" exh. valve lift. The exhaust port needs about 5 hours work per hole to get it to flow. This brings the exhaust flow up to 210/230 cfm depending on the the work done. The intake port has a real bad...
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    Supercharged Trailblazer 4200 I6

    Its been a while - used to post on trailvoy and here - now mostly on the dedicated 4200 engine site. On my turbo engine switching from 94 octane pump gas to 100% methanol - we were able to increase the WOT timing under boost close to 18* total - this increased torque output by close to 35% at...
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    billet cam blanks - with VVT oil passages

    Blanks are $585 + shipping.
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    billet cam blanks - with VVT oil passages

    I accumulate cam blank orders over the year and then get them done in one shot. The 8620 billet we got this time was longer than ordered - you get what they deliver.. The end result is we have enough material to cut 1 more set of 4200 blanks. The shop is almost done the rest of the order, so...
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    transfer case size - 4200?

    Anyone have a transfer case that they can measure for me? Looking for the over all length from the transmisison bellhousing where it bolt onto the engine to the end of the back output shaft on the transfer case. Thanks
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    turbo pistons

    eBay - New & used electronics, cars, apparel, collectibles, sporting goods & more at low prices Finally listed my original turbo pistons
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    4200 - manual trans adapter

    Building to order for now. For other applications I need accurate bell housing and trans bolt patterns. Here is one I did to bolt a 4L80E behind my 4200 turbo motor - got tired of messing with the built 4L70E. Uploaded with ImageShack.us"] Uploaded with ImageShack.us[/URL]
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    4200 - manual trans adapter

    Mainly for engine swaps, but I can build custom adapters to allow just about any GM/Tremec manual transmission to bolt up. this one is configured for a T5.
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    dyno numbers???

    Neither. Originally I ran a ford EDIS-6 ignition system using a front mount 36-1 trigger wheel. At the time it was the only option. Now I run LS2 truck coils COP using MS3 sequential ignition. Once I get a new exhaust cam made I'll finally be able to run VVT. My existing billet cam has the oil...
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    dyno numbers???

    Uploaded with ImageShack.us Uploaded with ImageShack.us
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    ANNOUNCEMENT Welcome to GMTNation.com! Here's the story...

    One thing that I'd really like to see is a dedicated hi-performance sub-forum for the 4200 and enforced to minimize the how to change xyz or I added abc headlights. It adds a lot of clutter that has a perfect place to be in the regular forum. This may be a deciding factor on what I...
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    dyno numbers???

    355 HP NA, billet cams, ported late head, reduced compression. 510 RWHP @ 11 psi

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