Dynoing the D

[XDevolution]

Has anybody dynoed there XD, I'm curious to know exactly how much power to the wheels do we actually have.

here are some baseline numbers i've seen from multiple graphs:

1. Fujita dynojet: 122.9 whp 121.3 lbs-trq (trd drop in filter and trd axleback)
2. K&N dynojet: 116.95 whp and 115.15 lbs-trq (stock)
3. AEM (corrected graph)whatever that means?: 101.67 whp (stock)
4. GReddy Dynojet: 115.5 whp and 115.04 lbs-trq (claimed w/ weapon r 421 headers and greddy se exhaust)

Now I'm all types of confused cause these numbers are all over the place and there all from Dynojet Dyno's except the AEM #'s. Can any one elaborate on which graph is most accurate. I know conditions and temperatures will effect power but in someones honest opinion, which set of numbers seem more logical. I need something to go by.

[CXTKRS1]

Different engines can sometimes produce different numbers, hell I remember on dyno day one year two bone stock WS6's pulled numbers 12RWHP apart. Different dynos will also produce different numbers, put our car on a Mustang dyno and it would probably be a hair above 100 FWHP. I see no RPM numbers as well which is kinda strange. All in all these numbers look pretty much correct for our cars and conditions (as you already know) will cause the numbers to bounce around a bit. The first number is kinda suspect but again no one knows the conditions. Their are also different tricks that can be used to raise the numbers as well..last time I saw that happen was when a ricer chick tried to dyno her turbo tC.

[XDevolution]

Different engines can sometimes produce different numbers, hell I remember on dyno day one year two bone stock WS6's pulled numbers 12RWHP apart. Different dynos will also produce different numbers, put our car on a Mustang dyno and it would probably be a hair above 100 FWHP. I see no RPM numbers as well which is kinda strange. All in all these numbers look pretty much correct for our cars and conditions (as you already know) will cause the numbers to bounce around a bit. The first number is kinda suspect but again no one knows the conditions. Their are also different tricks that can be used to raise the numbers as well..last time I saw that happen was when a ricer chick tried to dyno her turbo tC.

the one thing that boggles me is the K&N dyno and the GReddy dyno. K&N gets good numbers with a bonestock XD, while GReddy yeilded similar numbers but had a decent amount of modification done to it. I spoke to Rally XD (used GReddy dyno)and they said "our baseline included the headers and the exhaust"

so again:
GReddy dynojet: 115.5 whp and 115.04 lbs-trq (header and exhaust)
K&N dynojet: 116.95 whp and 115.15 lbs-trq (stock)

to me that is saying adding these mods will subtract from power instead of add. and i completely understand there are different dyno's and conditions vary, but wouldnt you think that because they are using dynojet dyno's that greddy SHOULD'VE produced higher numbers? thats in my opinion.

[CXTKRS1]

the one thing that boggles me is the K&N dyno and the GReddy dyno. K&N gets good numbers with a bonestock XD, while GReddy yeilded similar numbers but had a decent amount of modification done to it. I spoke to Rally XD (used GReddy dyno)and they said "our baseline included the headers and the exhaust"

so again:
GReddy dynojet: 115.5 whp and 115.04 lbs-trq (header and exhaust)
K&N dynojet: 116.95 whp and 115.15 lbs-trq (stock)

to me that is saying adding these mods will subtract from power instead of add. and i completely understand there are different dyno's and conditions vary, but wouldnt you think that because they are using dynojet dyno's that greddy SHOULD'VE produced higher numbers? thats in my opinion.

Different elevations maybe?

[DeadCannon]

Bolt-ons don't always add power any more. Modern ECUs will compensate for the "strange" air flow. It's very common for RX-8s and 350Zs to lose power when adding bolt-on mods.

[XDevolution]

I also saw a dyno session of a TC and it came out with baseline numbers of 148 whp and 137 lbs-trq and it was completely stock. so on both ends that is a -13 from the factory specs to the flywheel. i truely dont think the xD will lose almost a quarter of its power when tranfering to the wheels. and can elevation really make that much of a difference? that seems so unreal that it would lose power with mods like headers and an exhaust. there should be gains even if there small.

[scionkidd]

i think we dyno about 125 on the dyno with intake, pulley, and exhaust. from the people who were going to make an intake mani and disappeared...

[XDevolution]

[QUOTE=scionkidd;2546673]i think we dyno about 125 on the dyno with intake, pulley, and exhaust. from the people who were going to make an intake mani and disappeared...[/QUOTE/]

i recall dynatek post about the intake mani, and i think they said there stock XD got 118 whp. and with the intake, headers, and exhaust they got like 135 whp. with the pulley they said probably another 1.5 maybe 2 whp. but thats stone age. i wish an intake manifold came out still :/ according to there data they said they reach 152 whp, with evrything all together. thats almost as much as the rally xd 4psi setting.