DawnTreader Performance
@dawntreadereng.bsky.social
Restoration of F1, Indy and LeMans cars. Also work on MotoGP and WSBK's. Based on Sywell Aerodrome, Northampton.
Pinned
Penske PC26 Indycar on board at Sywell Aerodrome.
YouTube video by DawnTreaderPerfom
youtu.be
Driving the last race winning Penske chassis at Sywell last year. A James Ward Film youtu.be/DInCeAF1Da0?...
Reposted by DawnTreader Performance
One of the highlights of my decade--capturing @ColtonHerta attacking @WeatherTechRcwy in his dad's 1998 Reynard-Ford/Cosworth V8 turbo @IndyCar.
www.youtube.com/shorts/hMo5-...
www.youtube.com/shorts/hMo5-...
Colton Herta Drives His Dad's 1998 IndyCar #racing #motorsport
YouTube video by Marshall Pruett
www.youtube.com
February 10, 2026 at 3:09 PM
One of the highlights of my decade--capturing @ColtonHerta attacking @WeatherTechRcwy in his dad's 1998 Reynard-Ford/Cosworth V8 turbo @IndyCar.
www.youtube.com/shorts/hMo5-...
www.youtube.com/shorts/hMo5-...
Exploded view of new Yamaha R9 twist grip housing for Bikesport Development. In late stages of prototype now... biggest headache has been adequate thrust area when the rider is hanging off the bar vs. Can it be assembled with the housing split across the bar axis.
February 9, 2026 at 5:31 PM
Exploded view of new Yamaha R9 twist grip housing for Bikesport Development. In late stages of prototype now... biggest headache has been adequate thrust area when the rider is hanging off the bar vs. Can it be assembled with the housing split across the bar axis.
One of the standout features of the #PC27 is the plenum chamber as a structural part of the car. Deleted for 1999, the rear left mount was ground to make space for the crank trigger wire. We had a new mount EB welded in place and the rib built up with TIG. I very nervously dressed it back...
February 9, 2026 at 3:36 PM
One of the standout features of the #PC27 is the plenum chamber as a structural part of the car. Deleted for 1999, the rear left mount was ground to make space for the crank trigger wire. We had a new mount EB welded in place and the rib built up with TIG. I very nervously dressed it back...
Reposted by DawnTreader Performance
An @Ohlinsracing #F1 spec damper.
F1 dampers used to use fixed valving, swapping the entire unit for a fifferent spec, rather than adjust it
But, with the bouncing problems since 2022, they returned to being adjustable, to react to the cars behaviour through the weekend.
#F1tech
F1 dampers used to use fixed valving, swapping the entire unit for a fifferent spec, rather than adjust it
But, with the bouncing problems since 2022, they returned to being adjustable, to react to the cars behaviour through the weekend.
#F1tech
February 6, 2026 at 11:39 AM
Engine illustration from what now seems a long time ago...
February 5, 2026 at 5:36 PM
Engine illustration from what now seems a long time ago...
IC108E cylinder heads featured centre driven cams, adopted to keep the engine as short as possible. Cam caps are integral to the cam cover which with steel springs makes it quite hard to work with. 'Phase 2' version of the head with finger followers in place of tappet buckets + pendulum dampers.
January 30, 2026 at 1:43 PM
IC108E cylinder heads featured centre driven cams, adopted to keep the engine as short as possible. Cam caps are integral to the cam cover which with steel springs makes it quite hard to work with. 'Phase 2' version of the head with finger followers in place of tappet buckets + pendulum dampers.
IC108E centre V pump pack disassembled. Order of pumps from the front is - water pump - oil pressure pump - filter with head scavenge inside - oil/air separator (centrifuge).
January 28, 2026 at 11:51 AM
IC108E centre V pump pack disassembled. Order of pumps from the front is - water pump - oil pressure pump - filter with head scavenge inside - oil/air separator (centrifuge).
The 108E water, oil, head drain pumps, centrifuge and alternator are housed in the engines centre V. The pump pack is extraordinarly compact and a real fiddle to assemble - tiny 6/32 studs and nuts. Head drain scav sits inside a donut like oil filter.
January 27, 2026 at 10:54 AM
The 108E water, oil, head drain pumps, centrifuge and alternator are housed in the engines centre V. The pump pack is extraordinarly compact and a real fiddle to assemble - tiny 6/32 studs and nuts. Head drain scav sits inside a donut like oil filter.
Given things have stalled a bit with the #PC27, thought I would post some photos of the engine build previously posted on the 'other place'. Starting with 108D of '97 next to 108E of '98. The E is a hell of a lot more compact to it's detriment. Also centre V pumps and crank.
January 26, 2026 at 5:04 PM
Given things have stalled a bit with the #PC27, thought I would post some photos of the engine build previously posted on the 'other place'. Starting with 108D of '97 next to 108E of '98. The E is a hell of a lot more compact to it's detriment. Also centre V pumps and crank.
Got to say, the Ferrai does look pretty. Nose particularly. This gen if car is a definite improvement visually.
January 23, 2026 at 6:08 PM
Got to say, the Ferrai does look pretty. Nose particularly. This gen if car is a definite improvement visually.
Just want to say congratulations to Red Bull powertrains. Running a new engine on track for the first time is a huge achievement. Have a few old friends there - well done guys.
January 21, 2026 at 4:51 PM
Just want to say congratulations to Red Bull powertrains. Running a new engine on track for the first time is a huge achievement. Have a few old friends there - well done guys.
Picked up new Leyton House steering wheel from 'Dave the Trimmer' this morning. We made a replacement for the one that was stolen at Silverstone last year. If anyone has a lead on the original please contact Silverstone, Martin Stretton Racing, the police or myself. It should be with the car...
January 21, 2026 at 3:58 PM
Picked up new Leyton House steering wheel from 'Dave the Trimmer' this morning. We made a replacement for the one that was stolen at Silverstone last year. If anyone has a lead on the original please contact Silverstone, Martin Stretton Racing, the police or myself. It should be with the car...
Broken Veil series 1 was magnificent (listen if you haven't already), Tond a wonderfully creepy ghost story. These two guys have a magic chemistry, a sigular story telling ability and deserve your attention.
Thanks to everyone who is supporting making the new series of Broken Veil…
Cheers. We wouldn’t be able to do any of this without you.
www.patreon.com/brokenveil
Cheers. We wouldn’t be able to do any of this without you.
www.patreon.com/brokenveil
January 19, 2026 at 5:14 PM
Broken Veil series 1 was magnificent (listen if you haven't already), Tond a wonderfully creepy ghost story. These two guys have a magic chemistry, a sigular story telling ability and deserve your attention.
Photos I've seen of the new cars - man they look so much better.
January 16, 2026 at 8:17 PM
Photos I've seen of the new cars - man they look so much better.
Finally getting stuff down from the atic at home post Nov 2024 flood. Happy to find I still have Ali version setter of the 2001 Merc FK piston I drew in 2015 as well as a valve and finger follower. Origonal piston of 2001 was AlBe.
January 16, 2026 at 6:59 PM
Finally getting stuff down from the atic at home post Nov 2024 flood. Happy to find I still have Ali version setter of the 2001 Merc FK piston I drew in 2015 as well as a valve and finger follower. Origonal piston of 2001 was AlBe.
Last photos of 106B for the week! #canonporsche 📸James Ward Films
January 16, 2026 at 3:54 PM
Last photos of 106B for the week! #canonporsche 📸James Ward Films
106B cockpit. Quite a lot of internal lighting needed to get these shots as everything internal is designed to prevent reflected sunlight at dusk and dawn. When JP crashed at Spa in '85 the gear stick pierced his helmet visor... scary stuff. #canonporsche 📸 James Ward Films.
January 15, 2026 at 12:12 PM
106B cockpit. Quite a lot of internal lighting needed to get these shots as everything internal is designed to prevent reflected sunlight at dusk and dawn. When JP crashed at Spa in '85 the gear stick pierced his helmet visor... scary stuff. #canonporsche 📸 James Ward Films.
This proved to be a difficult shot to get. Much lining up of car and bodywork with James Ward sweating in the roof space above (it was an extremely hot day + lights etc.). Worth the effort though. 📸James Ward Films.
January 14, 2026 at 2:42 PM
This proved to be a difficult shot to get. Much lining up of car and bodywork with James Ward sweating in the roof space above (it was an extremely hot day + lights etc.). Worth the effort though. 📸James Ward Films.
956-106B engine bay. The flat 6 is the larger capacity motor Richard Lloyd Racing used in the the '86 season (by all accounts what arrived from the factory was something of a lottery). The team unusually used smaller than standard K26 turbos for added mid range (STD was K27). 📸 James Ward Films.
January 12, 2026 at 5:19 PM
956-106B engine bay. The flat 6 is the larger capacity motor Richard Lloyd Racing used in the the '86 season (by all accounts what arrived from the factory was something of a lottery). The team unusually used smaller than standard K26 turbos for added mid range (STD was K27). 📸 James Ward Films.
Porsche 956-106B from our photoshoot at Junction 11 Studios last year. 📸James Ward Films. More to follow!
January 12, 2026 at 4:25 PM
Porsche 956-106B from our photoshoot at Junction 11 Studios last year. 📸James Ward Films. More to follow!
I loved this concept. Something similar my idle brain thought about in 2002/3ish but being an engine guy had no idea if it could work in paractice. Gains look obvious but as I understand it not so good in yaw. Remember thinking 'YES! Something really different and brave!' 10 out of 10 Williams.
On this day in 2004, Williams caused a stir when launching the FW26 as its nose, featuring two 'tusks', was unveiled.
With Ferrari dominant, the FW26 was limited to one race victory, at the Brazilian Grand Prix.
With Ferrari dominant, the FW26 was limited to one race victory, at the Brazilian Grand Prix.
January 6, 2026 at 5:00 PM
I loved this concept. Something similar my idle brain thought about in 2002/3ish but being an engine guy had no idea if it could work in paractice. Gains look obvious but as I understand it not so good in yaw. Remember thinking 'YES! Something really different and brave!' 10 out of 10 Williams.
This post got me thinking about the parallels between painting minatures and my day job, F1, Indycar restoration. It may seem obscure but so many of the same rules apply - athetics, attention to the smallest mech detail, and when you think it's finished, push yourself further to get it to 100%.
I don’t Warhammer but boy do I love seeing everyone’s beautifully-painted miniatures
January 5, 2026 at 4:48 PM
This post got me thinking about the parallels between painting minatures and my day job, F1, Indycar restoration. It may seem obscure but so many of the same rules apply - athetics, attention to the smallest mech detail, and when you think it's finished, push yourself further to get it to 100%.
Reposted by DawnTreader Performance
#OnThisDay in ’92, at Firebird Raceway near Phoenix, Ayrton Senna tested a Penske #IndyCar in secret, encouraged by then current Penske ace Emerson Fittipaldi. Ayrton was very quick - 0.5sec faster than Emmo - but he decided to continue in #F1 & he never drove an IndyCar again.
December 20, 2025 at 10:57 AM
#OnThisDay in ’92, at Firebird Raceway near Phoenix, Ayrton Senna tested a Penske #IndyCar in secret, encouraged by then current Penske ace Emerson Fittipaldi. Ayrton was very quick - 0.5sec faster than Emmo - but he decided to continue in #F1 & he never drove an IndyCar again.