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Originally Posted by jason99frc  Contrary to the belief of most people on the LS boards, the majority of the best engine builders don't spend much if any of their time building LS motors. There are arenas in motorsports with a much more lucrative business model for building engines than trying to compete with the cookie cutter builds most prefer in our LS world. Aside from some of the unique intake flow characteristics on the LS based heads its just a small block chevy so any competent race engine builder can easily learn the differences and make an LS setup make the power.
How often do we actually see FWHP #'s on this board ? Call up TSP, or HKE etc... and ask what kind of FWHP #'s they've seen before raising the BS flag. Something else to consider is, this engine on the dyno more than likely had the optimum exhaust, no accessories, temp controlled enviroment, e-water pump etc..... |
Ok, I live in Fort Myers and have for over 20 years and never heard of this shop, not saying that its a bad shop, you would just figure a good shop would have some "word of mouth". I understand that a 383 can hit 600+ at the flywheel, but not with this head/cam combo, just doesn't add up. A 383 needs a really good head to perform with its squareness... a 383 is a very wierd set-up on LS motors, but they will do well if the heads can flow extremely well. Not gonna happen with just a LS6 head, Its usually a small bore type head from AFR, ETP, TFS with the chambers opened up. I do say BS, but it really doesn't matter.... I just hope no one from this board buy's it, puts it in the car and only pumps out about 430rwhp on a chassis dyno. That is all that the motor is probaly worth.
EDIT - I just noticed that this is a road course car, so the cam is probally spec'd on a tighter LSA then normally what we see, maybe something on the lines of a 106... If this is true, then the LS6 would hold the motor back quite a bit. When you start getting into a tighter LSA cams, they become sensitive to the right setup. Also, it would make it to where this motor had next to nothing on the low range power, and still lazy in to the mid-range. Also, i noticed this person said a stock LS6 head with port work and bowls blended (the fact that he said bowels is a bit disturbing but none the less....), to get these heads to even remotely come close to feeding a 383 what it needs, those heads are goign to need to be cnc'd. If you look at the pics, those runners still look pretty damn rough. Also, what is the C261 number that is labeled on the head?