Originally Posted by Full Force (Post 4326770)

How many guys are putting N/A 540's in a 11,500lb mistress? Kinda if oddball situation at the same time if you put these engines in a 353 formula I bet results would be much different.... As upset as I was last night the more you think and look at it all starts to make sense... Compare apples to apples and see what other mistress's do not many broke 70 mph as it is even with higher konrads and such still only go 72-73 from what I found.... I needed more low end grunt I think to push this boat to get to 5800-6000 range with these props and it's just not there at 5-5400 rpm ... I bet at that rpm I am at 600-620 hp max and the speeds are right on with that... I don't need a dyno to figure this out... GPS and rpm tell me everything I need to know

Originally Posted by SB (Post 4326803)

That will work very well.

With your cubes and AFR heads low end, mid range, and top end (upper 5k's) should work extremely well.

Originally Posted by cigrocket (Post 4326805)

I was at 78.6 mph with 540's spinning 4 blade 28's at 5300. I could have hit 80 with labbing and running 5500 rpm. I made 675 and 680 on the dyno. I had the konrads. It was a 1985 mistress.

Originally Posted by Full Force (Post 4326811)

I was hoping you would chime in, what were your specs agin? You sent but I can't find them.... Just trying to compare... What did you have when TRS?

Originally Posted by Knot 4 Me (Post 4326798)

353 Formula? No, no, no. 35 Fountain would really wake those motors up!! :champs:

Originally Posted by cigrocket (Post 4326805)

I was at 78.6 mph with 540's spinning 4 blade 28's at 5300. I could have hit 80 with labbing and running 5500 rpm. I made 675 and 680 on the dyno. I had the konrads. It was a 1985 mistress.

Originally Posted by bigboat28 (Post 4326828)

Can you please post specs on here? I too have a motor that might need done.

Originally Posted by cigrocket (Post 4326885)

Those were the initial pulls, we changed the Jets and Tuned everything. I worked the props when I had the TRS, they were mirage 27s. With the TRS I was spinning 5100. With the Konrads I spun 28 4 blades stock at 5400.