DragStuff

Thanks a lot. I don't put a lot of faith in dyno numbers other than looking for gains. We did find 25 hp from how it was last run to how it came off the dyno. I have heard all kinds of dyno numbers, and figured if it made 850, and we wound up at 880 I would have been happy. I was completely surprised when it pulled up the first time and he said, its healthy that was 888. Lets do it again and back it up, and it pulled 889. I was disappointed though to see my 4 hole tapered Wilson spacer, lost 4 hp over the 1" open spacer. The average stayed I think 1 lower, so it may have had a few points of higher power, but overall it was no help. We then played with timing and it lost 4 going higher than 36 degrees, so we stopped there. Valve lash, picked up 5 opening the intake up .003. And then finally I changed the oil from Rotella 15/40, to Synthetic Rotella 5/40 and dropped oil from 7 qts to 6. That gained 7 hp. We backed that number up on 2 pulls to ensure the oil and engine had enough heat in it. Overall I am pretty pleased with a Summit catalog parts, garage built engine.

How many cubes is it?

Its a 548.

bracketchev1221 wrote:Thanks a lot. I don't put a lot of faith in dyno numbers other than looking for gains. We did find 25 hp from how it was last run to how it came off the dyno. I have heard all kinds of dyno numbers, and figured if it made 850, and we wound up at 880 I would have been happy. I was completely surprised when it pulled up the first time and he said, its healthy that was 888. Lets do it again and back it up, and it pulled 889. I was disappointed though to see my 4 hole tapered Wilson spacer, lost 4 hp over the 1" open spacer. The average stayed I think 1 lower, so it may have had a few points of higher power, but overall it was no help. We then played with timing and it lost 4 going higher than 36 degrees, so we stopped there. Valve lash, picked up 5 opening the intake up .003. And then finally I changed the oil from Rotella 15/40, to Synthetic Rotella 5/40 and dropped oil from 7 qts to 6. That gained 7 hp. We backed that number up on 2 pulls to ensure the oil and engine had enough heat in it. Overall I am pretty pleased with a Summit catalog parts, garage built engine.

Wow, 900+ hp, that's awesome. I'd love to have the money and opportunity to hang mine on a dyno but I'd probably come away disappointed lol...
I'm sure that mine makes a million hp

Nice work and very impressive output with your 'Summit catalog, garage built engine'.

It was actually really reasonable for cost. Andy Jensen of Jensen engine technologies ran it the whole day for $450. I brought the gas and anything I wanted to change. It was worth it to me over going to the track and spending the money for the day to not be able to quantify any gains. I saw 7 hp in engine oil between type and level. That could be negated by weather change or tire spin on 2 runs and I would never know it.