Q&A with Dundon
#16
#17
Damn you Jamie, I have an infected finger from the sharp under tray when installing your headers last weekend.
Now I have to spend more time under the car!
The internal engine modifications would need to be done elsewhere though, but will have to go with the ~4.2L option, as I'm OCD about even numbers.
Now I have to spend more time under the car!
The internal engine modifications would need to be done elsewhere though, but will have to go with the ~4.2L option, as I'm OCD about even numbers.
#18
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From: Gig Harbor, Wa
Damn you Jamie, I have an infected finger from the sharp under tray when installing your headers last weekend.
Now I have to spend more time under the car!
The internal engine modifications would need to be done elsewhere though, but will have to go with the ~4.2L option, as I'm OCD about even numbers.
Now I have to spend more time under the car!
The internal engine modifications would need to be done elsewhere though, but will have to go with the ~4.2L option, as I'm OCD about even numbers.
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Dundon Motorsports
Gig Harbor, WA
253-200-4454
jamie@dundonmotorsports.com
www.dundonmotorsports.com
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Dundon Motorsports
Gig Harbor, WA
253-200-4454
jamie@dundonmotorsports.com
www.dundonmotorsports.com
Facebook.com/dundonmotorsports
Instagram @dundon_motorsports
#19
I reinstalled my Dundon 991 GT3 headers and can't get the CEL to go off (probably because I put the O2 wires in backwards at first, since fixed). Any tips?
#20
On the Dundon Finger Follower Wear/Cam Wear Fix Update, would it be better to wait, see what are the changes in the new 991.2 gt3, see if the block is the same and use the solution applied in the 991.2 (new head mostly and internals with internal oil lines, if I'm not mistaken) and basically make a upgrade to a solved engine?
Or better, get the new 991 cup car engines and see what they done, apply to the 991.1 gt3 and RS and R, maybe develop on top of what they did. The finger follower design will always require rebuilds (same as bikes), so a new head altogether might be a better solution.
Or better, get the new 991 cup car engines and see what they done, apply to the 991.1 gt3 and RS and R, maybe develop on top of what they did. The finger follower design will always require rebuilds (same as bikes), so a new head altogether might be a better solution.
#22
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From: Gig Harbor, Wa
How do you perform pressure wave tuning during development? Is it empiric (just keep changing lengths and testing power), or is there a science behind cylinder size, exhaust valve size, RPMs, total cylinders, etc. that allows you to predict an optimum? Are the exhaust gasses from one cylinder scavenging an adjacent cylinder? If so, how would you do it with a V8 where the firing order timing of the exhaust pulses is not balanced for each cylinder bank?
I reinstalled my Dundon 991 GT3 headers and can't get the CEL to go off (probably because I put the O2 wires in backwards at first, since fixed). Any tips?
I reinstalled my Dundon 991 GT3 headers and can't get the CEL to go off (probably because I put the O2 wires in backwards at first, since fixed). Any tips?
Is it a flat plane V8 per chance? Might be best to take this offline...
CEL Codes are best read to see what they are, not assumed... That said if you're pretty sure you know what it's from, disconnecting the negative battery terminal works in a pinch if you don't have a code reader. If you need a code reader, call the shop at 253-2OO-4454 and we can send you one for free since you're already a customer! Tell John I said it was cool...
On the Dundon Finger Follower Wear/Cam Wear Fix Update, would it be better to wait, see what are the changes in the new 991.2 gt3, see if the block is the same and use the solution applied in the 991.2 (new head mostly and internals with internal oil lines, if I'm not mistaken) and basically make a upgrade to a solved engine?
Or better, get the new 991 cup car engines and see what they done, apply to the 991.1 gt3 and RS and R, maybe develop on top of what they did. The finger follower design will always require rebuilds (same as bikes), so a new head altogether might be a better solution.
Or better, get the new 991 cup car engines and see what they done, apply to the 991.1 gt3 and RS and R, maybe develop on top of what they did. The finger follower design will always require rebuilds (same as bikes), so a new head altogether might be a better solution.
#23
What type of purge/weld positioner setup do you use? You have a picture of a jig for tacking on the GT4 header page of your website. I would love to see a time lapse similar to the one below. Great product, and I respect you for using 321 instead of 304L.
#24
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From: Gig Harbor, Wa
I'll grab a pic of the purge setup. We're liking the FUPA Ar diffusers, Also have custom caps and Ar supply to shield the inside of the tubes...
Unfortunately no positioner yet, gotta pinch our pennies until we can get the one we want!
Unfortunately no positioner yet, gotta pinch our pennies until we can get the one we want!
#25
They look similar to the gas saver setup form CK worldwide. Do you have problems using the large cup with tight access, or do you increase your stick out? With your ingenuity you could make your own positioner. Keep up the good work!
#26
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From: Gig Harbor, Wa
The Furick Cup is really good at directing the Ar quite a long way... Check them out if you haven't had a chance! Great customer service too.
#28
Jamie,
Thanks for this thread--very good marketing idea. Speaking of marketing, I think you should choose some local guy who tracks, say, a 2009 Cayman S, and install a 3.8 9A1 as a test mule
Terry
Local guy who tracks a 2009 Cayman S
Thanks for this thread--very good marketing idea. Speaking of marketing, I think you should choose some local guy who tracks, say, a 2009 Cayman S, and install a 3.8 9A1 as a test mule
Terry
Local guy who tracks a 2009 Cayman S
#29
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From: Gig Harbor, Wa
https://www.amsoil.com/shop/by-produ...?code=EFMQT-EA
For track cars with no cats, the race oil, RD-50 with higher ZDDP is our preferred go to.
That said if you want more power, getting a bigger engine or making a bigger engine is pretty straight forward. Come on down and see us!