Quote:
Originally Posted by Glenn Sedig
Put 13 more runs on the heads with the inserts for a total of 21 runs. Leak down is
1----90%
2----94%
3----97%
4----99%
5----99%
6----99%
7----95%
8----98%
Don't know whats up with cyl 1, Set the car up with alcohol and had problems all weekend. Maybe the cyl got washed down before we tested it. Also the motor was cold.
Alcohol runs cooler so I don't know if the insert life will be tested with the same stress as with gasoline. We have done a set of heads for a nitrious engine so may be able to get some info on that when it is back together.
So far the inserts in my heads are holding well.
|
wow, 99% so thats 1% leakdown?? did not know that was possible.i wish my motor would do that, it does not even do that when everything is new..you guys must have some secrets!!
i have never seen any e.t on the track from minimal leakdown to up to 20 % leakdown in the center cylinders. Bruce Michale's old pontiac motor was the same way he changed head gaskets at 20% leakdown and never even saw it at the track...
guess it all depends on where the air is going...
glenn, hope you get the alcohol tune up fixed.