Will it Blow?
Posted: Wed Jun 25, 2014 9:22 pm
Hi guys,
I'm slowly getting more confident whilst testing my car but I'm now concerned about the longevity of the engine. Drawing on all your experience I would appreciate your opinion.
The MS3 log is showing boost of 195kpa (14psi) at 6K rpm, MAT peak of 28C, Engine is 1986 3.5 block bored/stroked to 4.3 by tvr, BV heads, V8 tuner turbo cam, MS handling fuel and ignition, Rotrex C38-81 charger.
Car weight is 1200kg, 280 hp before charger.
The engine seems to run well, no detonation, but the question is will it hold together if it has so far or does there generally have a gradual weakening of components leading to a bang?
It only hits 14PSI just before a gear change for a very short period of time,
10psi at 5k, 7psi at 4krpm and on the road boost can't be held for long anyway. Not Sure if I'm brave enough for a track day!
I'm also running a fairly conservative timing of 15 degrees advance over 4700rpm so does this reduce some of the stresses or is it better to get it optimized on a dyno?
I appreciate this is a very open question but I guess some of you have learned the hard way and I'm really trying to avoid that right now.
Any advice is welcome, thanks Dorian
I'm slowly getting more confident whilst testing my car but I'm now concerned about the longevity of the engine. Drawing on all your experience I would appreciate your opinion.
The MS3 log is showing boost of 195kpa (14psi) at 6K rpm, MAT peak of 28C, Engine is 1986 3.5 block bored/stroked to 4.3 by tvr, BV heads, V8 tuner turbo cam, MS handling fuel and ignition, Rotrex C38-81 charger.
Car weight is 1200kg, 280 hp before charger.
The engine seems to run well, no detonation, but the question is will it hold together if it has so far or does there generally have a gradual weakening of components leading to a bang?
It only hits 14PSI just before a gear change for a very short period of time,
10psi at 5k, 7psi at 4krpm and on the road boost can't be held for long anyway. Not Sure if I'm brave enough for a track day!
I'm also running a fairly conservative timing of 15 degrees advance over 4700rpm so does this reduce some of the stresses or is it better to get it optimized on a dyno?
I appreciate this is a very open question but I guess some of you have learned the hard way and I'm really trying to avoid that right now.
Any advice is welcome, thanks Dorian