TPI SBC refresh with G6 6 speed trany upgrade (Page 9/16)
Will NOV 28, 09:54 PM
Aircraft in flight don't vibrate like crazy. An automobile engine vibrates because it's got several pounds of mass going back and forth several hundred to several thousand times a minute inside of it. A turbine has ZERO reciprocating mass and is dead smooth... and bolts can STILL work loose.
fieroluv NOV 28, 10:01 PM

If you think helicopters don't vibrate you haven't ever taken a ride in one. They have shock absorbers on the rotor blades about six feet long and believe me those blades flop. Which is where the undeniably sound of a helicopter comes from. They shake violently, I have literally seen bolts falling out in flight. Of course they are non critical bolts, but have still seen it.
Hudini NOV 28, 11:43 PM
The engines on my aircraft (Airbus A320) always vibrate to some extent. Some tail numbers more than others. Correct me if I'm wrong Alex4mula, but your safety wire is very thick (spring steel maybe?) and won't bend as easy as the safety wire used on aircraft. Aircraft wire is smaller and is twisted using a special tool and tied off "banjo tight" as said before.

Good job on working out all the little kinks. Its always cool to see how someone fixes a problem.

[This message has been edited by Hudini (edited 11-28-2006).]

Alex4mula NOV 29, 08:27 AM

quote
Originally posted by Hudini:

The engines on my aircraft (Airbus A320) always vibrate to some extent. Some tail numbers more than others. Correct me if I'm wrong Alex4mula, but your safety wire is very thick (spring steel maybe?) and won't bend as easy as the safety wire used on aircraft. Aircraft wire is smaller and is twisted using a special tool and tied off "banjo tight" as said before.

Good job on working out all the little kinks. Its always cool to see how someone fixes a problem.




Yes this wire is very thick and stiff. It is not like those that you tie around bolts. It is funny because I never had problems with those bolts (to head) coming off. Only reason I am using them is because I am using regular gaskets instead of RTV. The bolts that do get loose on me are the three on the collectors. For those I found out that putting a second one below would hold them.
On another note I just found out that I will need to cut and modify both, front and rear exhaust components. When I installed the F40 I paid close attention to leave clearance between trany and cradle as per Archie's video. Doing that I think I raised that end enough to cause me problems on the rear exhaust in addition to all the other changes. Also I decided to cut the shock tower to get the clearance I need for the TB. I will weld some plates to cover it and reinforce it a little. More work....
Alex4mula NOV 29, 09:26 PM
I started some major surgery on the shock tower to solve the clearance problem for good. I will weld a plate to cover most of it. Also you can see how my left tail pipe fits now. Not good. It was near 1" lower. Will get help to fix that next monday. There is still hope to test it this year. Wish me luck!


Alex4mula DEC 02, 12:21 PM
Plate constructed and ready to weld.
Alex4mula DEC 02, 08:16 PM
Done. Sorry, more functional than looks


[This message has been edited by Alex4mula (edited 12-02-2006).]

Alex4mula DEC 03, 09:03 PM
Almost done. Stay tuned that a running video is coming tomorow!

Here my new clearanc problem areas resolved.
Alex4mula DEC 03, 09:15 PM
This weekend most things went well. I was able to fix all little issues (except exhaust), be done with parts fabrication and finish connecting the rest of the things. Put in all fluids, hooked ECM, battery, moved crank to 6° BTDC and fired it up. It started on first try. Big relief... But then the PROM was corrupted and was running like in limp mode. Went back to an old known good program and it ran better. Tried another PROM and adjusted timing (liked more like 12° than 6°) and it was idling normally. Idle smells super rich. I need to check how much vacuum this cam is putting compared to the old. But anyway I know it will require a lot of tuning to get it top notch. Stay tuned that I uploaded some videos of engine running

New cooling pipes and cool temp gage cap




Final trany cables hook up (pending slave) and final engine look.
Marvin McInnis DEC 04, 10:39 AM

quote
Originally posted by Will:

Aircraft in flight don't vibrate like crazy.




You obviously have never flown a single-engine airplane over open water or over mountainous terrain at night.

Reciprocating aircraft engines, in general, shake like crazy even when they're running "smoothly." A typical aircraft engine displacement is 90 cubic inches (1.5 liters) per cylinder, and most of the ancillary systems (induction, fuel, ignition, etc.) still represent the very best of 1930s technology! Added to that, operation over open water or over mountains at night is guaranteed to put the engine into "auto-rough" mode. Been there, done that!