Engine is coming out of Chevelle for the dyno.

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bracketchev1221
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Re: Engine is coming out of Chevelle for the dyno.

#16 Post by bracketchev1221 » Wed Jan 08, 2014 8:05 am

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.

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Hitchcock
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Re: Engine is coming out of Chevelle for the dyno.

#17 Post by Hitchcock » Wed Jan 08, 2014 11:06 pm

How many cubes is it?
73 Vette, moly back half
Pump gas 496
Two Pro Systems 950's
Chance 6000 converter

bracketchev1221
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Joined: Fri Oct 11, 2013 7:59 pm
Location: Mountville PA

Re: Engine is coming out of Chevelle for the dyno.

#18 Post by bracketchev1221 » Thu Jan 09, 2014 7:28 am

Its a 548.

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wikd69
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Re: Engine is coming out of Chevelle for the dyno.

#19 Post by wikd69 » Sun Feb 09, 2014 11:05 pm

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 :smt003

Nice work and very impressive output with your 'Summit catalog, garage built engine'.
1969 ProStreet Camaro RS Best 9.75@139 1.46 60'
Blown 427 BBC, TH400 w/Brake, Back-Half Ladderbar
Narrowed 12-Bolt, 4.10 Gears, Spool, Moser 33 Spline

http://www.marsh-racing.com/harrys_camaro-1.htm

bracketchev1221
Posts: 155
Joined: Fri Oct 11, 2013 7:59 pm
Location: Mountville PA

Re: Engine is coming out of Chevelle for the dyno.

#20 Post by bracketchev1221 » Mon Feb 10, 2014 7:15 am

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.

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