DG pipes
Chuck Rice
> Does anyone have any direct or indirect experiance with DG
> performance pipes for a Polaris 650??? Are they worth the added expense???
> I have a chance to get a used set for a real good price but I don't
> know much about them. How do they rate against say... PSI, Starting
> Line, or AAEN???
>
Dyno Tech has tested a bunch of them in their pipe shootouts. Some don't
look to bad, however some do. I just quickly thumbed through the Dyno
Tech issues but didn't see any DG test results on a 650. Wait a minute...
here it is:
91 Indy 650, carbs
Stock HP = 97.3 @ 92dB @ 8000 RPM
DG pipes HP = 110.4 @ 100dB @ 9000 RPM
No idea which version the DG pipes are
The DG's were the worst of the bunch in this test
13 HP may be worth it if you can get a reasonable price and don't mind
running the engine at 9000 RPM and have a good set of ear plugs.
Donald Leonard
performance pipes for a Polaris 650??? Are they worth the added expense???
I have a chance to get a used set for a real good price but I don't
know much about them. How do they rate against say... PSI, Starting
Line, or AAEN???
Specifically, these are 89' pipes and I'd like to use them on my
90'650. DG sells two different models, one is for 88'-89' and the
others for 90'-92'. The only difference according to DG, is the
exhaust outlet port position in the belly pan.
Apparently there are no physical differences between an 89' and 90'
motor. This means they both make the same HP.
Does anyone have any further comments?????
thanks
don
--
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Donald T. Leonard |Honda Sabre | "Bumpy trails?
d...@tellabs.com | | Don't get mad get rad!"
..!uunet!tellab5!don |Indy 650 |
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Chuck Rice
>
> Do you know if the 91' has the 02 style (RXL) heads??? These have
> bigger intake and exhaust ports. If they stayed with the same pipe
> design from the older 89-90 years this may explain the lower HP. My
> sled still has the older 01 style head design. I don't know when
> they started installing the newer ones.
>
According to the Dyno Tech report that I quoted the 91 did have the 02
cylinders.
Donald Leonard
>Dyno Tech has tested a bunch of them in their pipe shootouts. Some don't
>look to bad, however some do. I just quickly thumbed through the Dyno
>Tech issues but didn't see any DG test results on a 650. Wait a minute...
>here it is:
>
> 91 Indy 650, carbs
> Stock HP = 97.3 @ 92dB @ 8000 RPM
> DG pipes HP = 110.4 @ 100dB @ 9000 RPM
> No idea which version the DG pipes are
> The DG's were the worst of the bunch in this test
>
>13 HP may be worth it if you can get a reasonable price and don't mind
>running the engine at 9000 RPM and have a good set of ear plugs.
Thanks for the info Chuck!!
Do you know if the 91' has the 02 style (RXL) heads??? These have
bigger intake and exhaust ports. If they stayed with the same pipe
design from the older 89-90 years this may explain the lower HP. My
sled still has the older 01 style head design. I don't know when
they started installing the newer ones.
As a side note, if anyones interested in the pipe shootout info for
the 89 or 90 650's ... I have it. I just don't have anything on DG.