SDPC 402 dyno #s
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From: Marysville, WA
SDPC 402 dyno #s I went & dynoed the new stroker today. I was pleased with the NA numbers, considering it only has 9.3 CR. I gained 25rwhp & 40 rwtq SAE over my hot cam LS1 motor. So I should be right where I wanted it when the blower goes on. (assuming we get anywhere close to the 40% for the P-1SC or 60% for the D ATI advertises - Todd gained 140rwhp with this blower)
The results are:
Old motor - 361rwhp, 346rwtq; = 490 eng hp & 475 eng tq
Stroker - 385rwhp, 403rwtq; = 530 eng hp & 555 eng tq
(eng #s assume 20% stock drivetrain loss + the 7.5% I documented on the 9" & Stall)
Oh, and there was a blip on the new dyno chart. They thought it was flashing too fast. It actually broke the tires loose once when it downgeared into 2nd, which I thought was pretty cool.
I'll have to go upstairs to the other computer & post the dyno sheet.....
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The results are:
Old motor - 361rwhp, 346rwtq; = 490 eng hp & 475 eng tq
Stroker - 385rwhp, 403rwtq; = 530 eng hp & 555 eng tq
(eng #s assume 20% stock drivetrain loss + the 7.5% I documented on the 9" & Stall)
Oh, and there was a blip on the new dyno chart. They thought it was flashing too fast. It actually broke the tires loose once when it downgeared into 2nd, which I thought was pretty cool.
I'll have to go upstairs to the other computer & post the dyno sheet.....
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Thanks for the data. It is most interesting as it gives a pretty good baseline of the value of compression. I have about 100 more rwhp with 11:0/1 compression vs your 9.3/1. Cam? Mine is a mid 230s baby cam.
And about 45 more rwtq. Compression is good.
You looking for about 200 more hp with the blower?
Perry
And about 45 more rwtq. Compression is good.
You looking for about 200 more hp with the blower?
Perry
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Interesting Perry, I was wondering what 11:1 would have given me. I have a 22x/23x cam designed for boost, & most of the work on the heads was focused on the exhaust side. Compression IS a good thing. Nothing sounds quite like it.... 
And around 200 hp from the blower is my goal. I'm thinking 550rwhp should get me the ET I'm looking for.
And around 200 hp from the blower is my goal. I'm thinking 550rwhp should get me the ET I'm looking for.
I have the TSP torquer (233/233)with LS6 intake and ported stock TB. Plus all the other important stuff.
484 rwhp/444 torque.
I do have an M6 and 10 bolt however. So I would suspect that the compression alone is more like 60-65 rwhp rather than the full 100, as I suspect that you are losing 35 rwhp or so in the driveline that I am not.
Perry
It will be awesome when you get it together.
484 rwhp/444 torque.
I do have an M6 and 10 bolt however. So I would suspect that the compression alone is more like 60-65 rwhp rather than the full 100, as I suspect that you are losing 35 rwhp or so in the driveline that I am not.
Perry
It will be awesome when you get it together.
