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resident samsquamch
Join Date: Oct 2005
Location: Cooterville, Cackalacky
Posts: 6,815
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3.4L Turbo engine mock-up pictures
Here are some pictures of the dry assembly (mock-up) of my engine. Neil Harvey of Performance Developments handled ALL of the machine work for me and the list is extensive. These pictures were taken by him at his shop. I sent him my disassembled long block and told him to make it right. There wasn't enough money left in my budget to have him (or anyone else) do the final assembly of the long block, so I thought I'd at least compromise and have Neil handle the valve to piston clearance check. This also enabled him to get a final compression ratio measurement (7.3:1) and to ensure that the major parts would all line up properly. I was confident that there would be plenty of clearance (I was planning on doing this critical check myself), but in case there was a problem, it saved me the potential delays in having to ship the parts back to him to have the clearances machined. EVERYTHING has been measured and documented. The parts should be shipping this week, then I can start the final assembly.
![]() ![]() ![]() ![]() ![]() Valve seats being dressed: ![]() Second spark plug hole being done: ![]() ![]() Valve guide being done: ![]()
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-jeff back in the saddle: '95 993 - just another black C2 *SOLD*: '87 930 GP White - heroin would have been a cheaper addiction... "Ladies and Gentlemen, from Boston Massachusetts, we are Morphine, at your service..." - Mark Sandman (RIP ![]() |
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Looks awesome! Good luck with your project. If you don't mind my asking, how much does he charge for twin plugging?
Pat
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10 Ford Raptor 86 930 |
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abit off center
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Did you go with the 14 or 12mm lower spark plugs?
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______________________ Craig G2Performance Twinplug, head work, case savers, rockers arms, etc. |
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Join Date: Mar 2002
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Awesome stuff! Looks like you want BIG HP!
Would you like to buy some awesome Marco Menzie made 930 racing headers and Borla exhaust to go with this upgrade? I'm selling it all (complete), cheap!
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Merv '89 911 Turbo Cab Protomotive MAP ECU, Twin Plugged Heads, GT2-EVO CAMs, 3.3L fully finned P&C's, ARP fasteners, C2T head gaskets, Titanium Retainers, Turbo spec valves, springs & guides, 964 splash valves, GT35R BB turbo, GSF Stainless Headers, Magnaflow Exhaust, Full bay Intercooler, TiAL 46mm w/gate, TiAL 50mm BOV, Apexi AVC-R EBC, SPEC Stage3+ Clutch kit, Crane CDI Ignition ![]() |
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Merv, If the Sand Man is not interested I am.
Pat Haskell
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10 Ford Raptor 86 930 |
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resident samsquamch
Join Date: Oct 2005
Location: Cooterville, Cackalacky
Posts: 6,815
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Quote:
__________________
-jeff back in the saddle: '95 993 - just another black C2 *SOLD*: '87 930 GP White - heroin would have been a cheaper addiction... "Ladies and Gentlemen, from Boston Massachusetts, we are Morphine, at your service..." - Mark Sandman (RIP ![]() |
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resident samsquamch
Join Date: Oct 2005
Location: Cooterville, Cackalacky
Posts: 6,815
|
Quote:
__________________
-jeff back in the saddle: '95 993 - just another black C2 *SOLD*: '87 930 GP White - heroin would have been a cheaper addiction... "Ladies and Gentlemen, from Boston Massachusetts, we are Morphine, at your service..." - Mark Sandman (RIP ![]() |
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resident samsquamch
Join Date: Oct 2005
Location: Cooterville, Cackalacky
Posts: 6,815
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Quote:
__________________
-jeff back in the saddle: '95 993 - just another black C2 *SOLD*: '87 930 GP White - heroin would have been a cheaper addiction... "Ladies and Gentlemen, from Boston Massachusetts, we are Morphine, at your service..." - Mark Sandman (RIP ![]() |
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Join Date: Mar 2002
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No worries sand_man. I'm in the process of having a twin turbo system installed "Protomotive system". I can't wait till it's completed. I'm not going for big HP. Just quick spooling, big torque street performance. Should be a sweet setup indeed.
Good luck with your project!
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Merv '89 911 Turbo Cab Protomotive MAP ECU, Twin Plugged Heads, GT2-EVO CAMs, 3.3L fully finned P&C's, ARP fasteners, C2T head gaskets, Titanium Retainers, Turbo spec valves, springs & guides, 964 splash valves, GT35R BB turbo, GSF Stainless Headers, Magnaflow Exhaust, Full bay Intercooler, TiAL 46mm w/gate, TiAL 50mm BOV, Apexi AVC-R EBC, SPEC Stage3+ Clutch kit, Crane CDI Ignition ![]() |
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Registered
Join Date: Oct 2003
Location: Central Fla
Posts: 1,864
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Solid Tensioners
I see that you are using the tensioners that we manufacture, have you seen the other stuff for the 911 engines ? we have developed a 12 pin distributor both internal and crank triggered. as well as a line of billet cylinders with iron liners that range from 2.0 thru 3.8 and also some custom sizes and lengths as well. check it out JBRacing.com Your project looks nice by the way.
Mike Bruns |
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Are you using solid tensioners?
Regards,
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Bernard |
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resident samsquamch
Join Date: Oct 2005
Location: Cooterville, Cackalacky
Posts: 6,815
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Re: Solid Tensioners
Quote:
As for JB Racing, yes I am familiar with your products...TOP NOTCH stuff! Your cylinders are works of art and came highly recommended by user DonE. They were unfortunately beyond my budget for this engine build. Maybe next time.
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-jeff back in the saddle: '95 993 - just another black C2 *SOLD*: '87 930 GP White - heroin would have been a cheaper addiction... "Ladies and Gentlemen, from Boston Massachusetts, we are Morphine, at your service..." - Mark Sandman (RIP ![]() |
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Tensioners
We are in the process of making another run of the tensioners,when you get ready call and ask for me and I will take care of you. Have Fun
Mike Bruns JBRacing.com |
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Join Date: May 2002
Location: Up North
Posts: 1,449
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Mike, is there any downside to running with solid tensioners?
thanks... P.S. Sand_man - sorry to steal your post for an OT question ![]()
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87 930 K27HFS/B&B/Twin-Plug... Megasquirted ![]() |
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resident samsquamch
Join Date: Oct 2005
Location: Cooterville, Cackalacky
Posts: 6,815
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Quote:
__________________
-jeff back in the saddle: '95 993 - just another black C2 *SOLD*: '87 930 GP White - heroin would have been a cheaper addiction... "Ladies and Gentlemen, from Boston Massachusetts, we are Morphine, at your service..." - Mark Sandman (RIP ![]() |
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Join Date: Mar 2003
Location: Edmonton
Posts: 697
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Solid tensioners may not fail but they wreck havoc on the chain. There's no "give" in the system and puts way too much load on the chain. I'd recommend against it.
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Matt B '73 911E |
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Tensioners
We use solids in all of our race engines up to the 3.6/3.8 they have no ill effect on the chains if they are properly aligned and adjusted correct, you must allow for growth in the engine as it comes to temp. and adjust regular as the chain settles in. We have spent alot of hours on the dyno to figure what to set them cold vs. hot and how much time it takes to settle them in with the race chains. but for the street and milder engines its a little more maintenance intense and the pressure fed work well, in full race we have had the hard lines fail and cause major oil leaks even with all the latest updates but never a pressure tensioner itself fail.
Mike Bruns |
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Location: Edmonton
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The chain 'settling in' is actually it getting longer due to wear. It's a common misconception that chains 'stretch' when infact it's actually the holes in the links getting bigger and the pins getting smaller.
There's all sorts of loads that get transferred into and out of the chains and by having a tensioner with no 'give' these loads likely get very high. Obviously I haven't measured the effects of all of this but a solid tensioner isn't ideal from a pure engineering standpoint. With that said, the failure of a tensioner is more severe than a worn chain. For non street vehicles it could be a better solution.
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Matt B '73 911E |
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abit off center
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What about a stop in the bottom of a pressure tensioner to prevent total failure? Would this be the best of both worlds?
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______________________ Craig G2Performance Twinplug, head work, case savers, rockers arms, etc. |
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Craig, it would be my choice if I were building an engine... Not much downside that I can see and eliminates the problems of solid tensioners.
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Matt B '73 911E |
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