Originally Posted by Full_Tilt_Boogie
(Post 1145665)
There is a difference between consistency and accuracy.
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Dynojet 228/248 is only approved dyno for NASA and SCCA. Why run a mustang unless that's the only thing around. Accuracy/consistency... you don't have a choice of your competing in either.
The only way around that is if you've got awd |
Originally Posted by GeneSplicer
(Post 1145669)
Dynojet 228/248 is only approved dyno for NASA and SCCA. Why run a mustang unless that's the only thing around. Accuracy/consistency... you don't have a choice of your competing in either.
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Originally Posted by Full_Tilt_Boogie
(Post 1145665)
There is a difference between consistency and accuracy.
sorry, after seeing hundreds of inflated and "corrected" mustang and dynodynamics dyno results I've pretty much lost any and all faith in "dyno accuracy". I'd go as far as to say there's accuracy with consistency. As long as you know the baseline vs finished numbers, you get repeatable results that you can at least somewhat compare with others. PS: what I find most hilarious is everyone uses the "mustang dyno" disclaimer and the 10-15% lower reading regardless of whether that's actually true, and it makes their numbers look amazing. I'm not saying that's what Cord is doing here. I would tend to completely trust the plot and disclaimer in this thread specifically. So OP, this is not aimed at you at all :) |
Originally Posted by 18psi
(Post 1145672)
and a dyno that can be manipulated by the user has neither.
sorry, after seeing hundreds of inflated and "corrected" mustang and dynodynamics dyno results I've pretty much lost any and all faith in "dyno accuracy". I'd go as far as to say there's accuracy with consistency. As long as you know the baseline vs finished numbers, you get repeatable results that you can at least somewhat compare with others. PS: what I find most hilarious is everyone uses the "mustang dyno" disclaimer and the 10-15% lower reading regardless of whether that's actually true, and it makes their numbers look amazing. I'm not saying that's what Cord is doing here. I would tend to completely trust the plot and disclaimer in this thread specifically. So OP, this is not aimed at you at all :) This particular dyno is 9 minutes from our shop, so I probably won't be venturing out for alternatives. Last, we were picking up some detonation right after the session and I'm beginning to think that the carbon build-up from the previous rich tune was causing some "hot spots" on the pistons. We've backed off the tune, but I think the horsepower will pick up more as the crud blows out of the engine. |
Originally Posted by GeneSplicer
(Post 1145669)
Why run a mustang unless that's the only thing around.
Dynojets are great for making back to back comparisons between different cars, but very few of them are equipped for steady-state operation. The two types of dynos are different tools optimized for different tasks. |
I guess I'm spoiled then. My tuner has an Eddy Current load-holding Dynojet.
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Originally Posted by GeneSplicer
(Post 1145964)
I guess I'm spoiled then. My tuner has an Eddy Current load-holding Dynojet.
If I were a shop owner interested in catering to the "three pulls for $50" crowd, I'd get a Dynojet. If I were a tuning shop or was focused on engine development, I'd buy a dyno that was inherently steady-state, rather than tacking on an optional eddy brake to a huge, heavy inertial model. |
Originally Posted by Joe Perez
(Post 1145975)
Yeah, the eddy brake is an option on most Dynojet models, but my experience mirrors Cord's in this respect. Five years ago, I went crazy trying to find a steady state dyno in the same town, and couldn't find a single one. I wound up working on an inertial-only Dynojet at a shop that did mostly drag cars, and it was slightly frustrating.
If I were a shop owner interested in catering to the "three pulls for $50" crowd, I'd get a Dynojet. If I were a tuning shop or was focused on engine development, I'd buy a dyno that was inherently steady-state, rather than tacking on an optional eddy brake to a huge, heavy inertial model. |
MSPNP2
One other point; Bill had zero experience with the MSPNP software, as his specialties are Subie, GTR and Porsches.
Bill familiarized himself quickly with the software, adjusted the VE tables and then took the time to calibrate my "14point7" wide band sensor. He made sure that the changes he was making were essentially correctly reflected in the tune. When he was done we had a 22 year old engine with a chinacharger and FM supporting hardware putting out some really good numbers. Suffice it to say that the Subie faithful in the shop we're really impressed with the figures, and maybe a little worried. :). |
Originally Posted by cordycord
(Post 1146273)
Suffice it to say that the Subie faithful in the shop we're really impressed with the figures, and maybe a little worried. :).
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Should be a hoot to drive at that HP level. IIRC Ron Cortez got 200whp on his Catfish using a Rotrex. It was very competitive in class at the 2013 25hr race.
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Originally Posted by k24madness
(Post 1146336)
Should be a hoot to drive at that HP level. IIRC Ron Cortez got 200whp on his Catfish using a Rotrex. It was very competitive in class at the 2013 25hr race.
Ron and Oscar Jackson had a solid race plan, but then 25 hours. The first year we "beat" the factory Audi TT in our class, mainly because they broke. Last year we broke...well, we couldn't avoid missing a car that was limping along on the racing line. At night. With no lights... I can't wait for this year's race on the "Thunderschleiffe". A long track brings other considerations, and it will be really interesting to see who has the answers. |
Originally Posted by Leafy
(Post 1146304)
This is the surprising shop, most subie shops are all "here is this tune I made once for a guy with similar mods to you on an access port, thankyou for the $500".
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Oceanside harbor
8 Attachment(s)
Took some pictures as the sun went down over Oceanside Harbor tonight.
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What an incredible looking car. Would drive. Wow.
Great job, sir. |
Originally Posted by cordycord
(Post 1149171)
Took some pictures as the sun went down over Oceanside Harbor tonight.
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Thanks guys. :).
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Originally Posted by cordycord
(Post 1149184)
Thanks guys. :).
My old man is considering building an MX5/miata based kit car.... |
Originally Posted by richyvrlimited
(Post 1149185)
Idle question, are your cars available RHD / can you export kits to the UK.
My old man is considering building an MX5/miata based kit car.... |
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