Hello all,
I just finished having a 107' build I completed and the took it to have it tuned and run on the dyno and the number seem a bit low to me I was wondering if anyone had input as to why, or opinions on the torque curve I guess for the $$ spent I expected a bigger kick in the pants. Build specs as follows

107" plugged, welded, balanced and trued with H-beam rods, Hillside stage III heads, (10.3:1) Flat top pistons, Kuryakyn 24-d cams, with SE billet cam plate and high volume oil pump, SE heavy breather, SE 58mm Throttle body, 5.3 injectors, 4" Rinehart True duals, SE extra Clutch plate kit and heavy duty spring, tuned with a Power Vision

Thank you for all of your opinions

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Check the cranking compression

Do you have an SAE sheet ?

 

It's ok I guess, I would wish for a bit more with stage 3 heads but numbers don't always mean a real lot around here. As long as your happy with how it goes seat of the pants and it's running well don't stress too much just enjoy it!

 

Sounds as if you had the major work done by one of HDF's top tuners and their website does suggest bigger numbers. You really should talk to Hillside. There may be ways of improving your numbers. Personally I wouldn't use any form of TD pipes, but a 2-into-1 should give a decent boost in low/mid range torque. Hillside make a point on their website of repeating that the correct exhaust should be used for maximum benefit!

 

The dyno chart shows the head pulling out quite well to 6000 rpms.
If the cylinder head flow was was sub-standard, (and it is not) the dyno chart would be showing a distinct struggle/flatline in the upper rpm band.
Almost makes me think that pipe might be not playing well with others?
Scott

 

not a big fan of the rienhart true duals at all

 

What numbers were you expecting?

 

Being as I helped with this build and Diggler is a very good friend of mine. Scott the heads aren't in question was just curious if that's how those cams act (maybe that is a really nice looking torque curve we don't know?) or any of you guys could point out something else that may be wonky or not working IE pipe and A/C as far as numbers I would have to think that the combo should be in the 120+ range but if the pipe is giving up 5-7 and lets say the AC is another 3-5 that's still 117-121 thank you scott and everyone else and cranking compression was right at 190

 

Over on the HTT, there is a 106"/24 cam build that is rolling about 1.5 hp more, and 2.5 or so more torque, and they are jumping up and down over it and applauding.
That one has a 2/1 pipe, and has very flat torque.
190 psi ccp is about all be want to see for folks locked into 91 octane, and heat also.
Betcha' a D&D Fatcat/standard baffle, would make that a much different animal.
Me thinks it is in there, just not all exposed, at this point.
Scott

 

Thank you Scott that's why we gave our money to you appreciate you standing behind it will look into other options as far as exhaust