420 AWHP with Utec
Yes, the impeller isn't spinning as quickly, but one has to consider the offsetting effect of the larger housing equally.
At any rate, it's difficult to conclusively determine anything without actually measuring the difference in pressure, and this is more or less academic. Any long duration cam set is going to cause an upset of idle A/F due to mechanical inefficiency, and tweaking this is where the remedy lies, FWIW.
A note to Tampa Turbo:
If you're still experiencing what you feel is excessive preignition, consider a different cam setting. The 0/0 setting creates higher cylinder pressure at lower engine speeds, which greatly increases the tendency to detonate. A different cam setting alleviates this and certainly gives an increase in higher rpm power.
At any rate, it's difficult to conclusively determine anything without actually measuring the difference in pressure, and this is more or less academic. Any long duration cam set is going to cause an upset of idle A/F due to mechanical inefficiency, and tweaking this is where the remedy lies, FWIW.
A note to Tampa Turbo:
If you're still experiencing what you feel is excessive preignition, consider a different cam setting. The 0/0 setting creates higher cylinder pressure at lower engine speeds, which greatly increases the tendency to detonate. A different cam setting alleviates this and certainly gives an increase in higher rpm power.
Originally Posted by Ted B
Yes, the impeller isn't spinning as quickly, but one has to consider the offsetting effect of the larger housing equally.
At any rate, it's difficult to conclusively determine anything without actually measuring the difference in pressure, and this is more or less academic. Any long duration cam set is going to cause an upset of idle A/F due to mechanical inefficiency, and tweaking this is where the remedy lies, FWIW.
A note to Tampa Turbo:
If you're still experiencing what you feel is excessive preignition, consider a different cam setting. The 0/0 setting creates higher cylinder pressure at lower engine speeds, which greatly increases the tendency to detonate. A different cam setting alleviates this and certainly gives an increase in higher rpm power.
At any rate, it's difficult to conclusively determine anything without actually measuring the difference in pressure, and this is more or less academic. Any long duration cam set is going to cause an upset of idle A/F due to mechanical inefficiency, and tweaking this is where the remedy lies, FWIW.
A note to Tampa Turbo:
If you're still experiencing what you feel is excessive preignition, consider a different cam setting. The 0/0 setting creates higher cylinder pressure at lower engine speeds, which greatly increases the tendency to detonate. A different cam setting alleviates this and certainly gives an increase in higher rpm power.
Originally Posted by Ted B
Yes, the impeller isn't spinning as quickly, but one has to consider the offsetting effect of the larger housing equally.
At any rate, it's difficult to conclusively determine anything without actually measuring the difference in pressure, and this is more or less academic. Any long duration cam set is going to cause an upset of idle A/F due to mechanical inefficiency, and tweaking this is where the remedy lies, FWIW.
At any rate, it's difficult to conclusively determine anything without actually measuring the difference in pressure, and this is more or less academic. Any long duration cam set is going to cause an upset of idle A/F due to mechanical inefficiency, and tweaking this is where the remedy lies, FWIW.
Originally Posted by TampaTurbo
I am not having any real issues at this point but once in a while get an overboost condition even at higher rpms. I hear the -4/-1 causes a little slower spool but nice top end. I really dont want to sacrifice any spool but could go less on top.