Raptor Vs Powerdyne

[Michelson4301]

Hello tim,

Can you do a comparison between Raptor superchargers(both hopefully) compared to Powerdyne chargers with the 928 motorsport compressor wheel ? I would be interested to see both/3 compressor maps compared. Reason for asking is i've seen some DD printouts with boost mapped and the curve of your chargers seem to be fatter everywhere compared to my PD boost curve(deep down i'm keen to go faster and do bigger skids).

[Raptorsc]

Dave

Good point, to be honest I have never made the comparison myself however you shouldn't exactly be having problems getting your ECOTEC past 300rwhp with an intercooler + Powerdyne, like its been done before.

The Billett impeller is good and certainly have seen results and up to 3psi difference. A lad from LS1 forums by the user name of BREX or similar to that did a back to back comparison on an LS1 with Powerdyne + Billett and Vortec S Trim, lots of data logging etc. His conclusion was the PD + billett came on boost earlier and pumped more efficiently (less heat) than the Vortech giving him more power and better response. To conclude he changed back to PD + Billett as the optimimum 9psi setup for an LS1.

Now I have never ever compared a PD to a Raptor V, I rebuild PD's (up to 4 per week) and know them inside out mechanically but cannot confirm anything more. I have seen 928s pressure/volume chart but never a compressor efficiency map so I can't comment on that versus our own product either. http://www.928motorsports.com/parts/...neimpeller.php

As many know I have never released our maps to anyone as its the most sure way to prevent copying - like is it worth the time and effort or not, no one knows except me and an engineer. Suffice to say you hunt around the web and you find ECOTECs going 300rwhp +, you see torque gains of 45% on only 5psi of boost (Subaru), you see tractor pulling competitor with his 355 stroker + little Raptor V making a lazy 610Hp at 6psi with HEAPS more to come, 4.0 V8 Toyotas, 4.0 V6 Hilux, 1.8 Liter Lancers and so much more. Raptor V is strapped onto things from 2 liter to 6 liter and yet never out of efficiency range enough enough to produce a poor result - it is the Raptor Advantage. 5.5kgs of air moving aluminium

The Raptor V has the widest flow range for physical size of any Centrifugal compressor you will find for the size. Like a PD or Vortech is twice the weight and over a 1/3 larger again in size.

Our first Raptor R impeller arrives tomorrow, I know for sure since its already in Australia.



Anyhow if you need more skidding power there is 1 billett impeller left from the three that came in on Thursday this week

[Michelson4301]

Thanks for the reply. 300hp is old news . I'm pushing the bearings way too far in the PD as you know. With a 7.25" crank and 2.25" pulley i'm unsure of final peak pressure but would like a fat linear boost curve. I'll msg you when I get closer to completion about maybe an upgrade. The Billet compressor was fun but not what I had hoped. Perhaps the Bar and plate cooler held me back too much.

[Raptorsc]

I guess some data is always handy, if you don't know boost pressure with the current setup then you and I both don't have much data to go on.

What power are you getting now? It seems your bearings are going ok now since I haven't heard from you in a while

Did you use 3" pipework or something less for the intercooler?

Its a common complaint that the PD isn't doing a great job but in reality 95% of the time the system they are part of is the problem.