Global Time Attack 2018 Discussion
#201
Agree. But the top teams are obviously doing more than cobbling **** together. Why not start with something kind of reliable (say a 700hp v8) vs something you know is stupid (like a 700hp subaru motor).
Edit: I understand the desire to keep weight down, but if a v8 weighs 100 lbs more can't you just turn up the power a little and compensate using tires and aero?
Edit: I understand the desire to keep weight down, but if a v8 weighs 100 lbs more can't you just turn up the power a little and compensate using tires and aero?
#202
This assumes all materials are the same. A 4 cylinder iron block wont way notably less than a aluminum V6 or V8. I feel like the justification of Emilio building a high power BP and Canjam building a 700hp Subaru Boxer its about 10% actual reasons and 90% because they want to. And I think that is pretty awesome.
#203
For us it's simple. We are an NA/ NB Miata specialist so we want to go as far as we can with the BP. We have not yet reached the limits of that long block or the tub. We may find that we can't make 600whp long enough to be useful. But we do have data points of power near those levels working well.
That we have virtually no oil consumption, top end still healthy after running 400whp at 7500 rpm for a while, leads us to believe we can make it work. Bottom end is the weak link in our build and I feel it's simply our implementation. IOW, the failure is not endemic, we are simply doing it wrong. There are a few BP motors out there making 550-650whp with many runs without bottom end failure. Power density of a boosted BP is not far from an LS race motor, even when I/C and intake plumbing is factored in. But yeah, not constrained to a BP, we would build a 6.0L LS dry sumped race motor of around 700whp. Or more accurately, we would have Katech build it for us.
But yeah, if we someday win the overall and reset the production car lap record at around 1:36 with a BP, that would be a day of days.
That we have virtually no oil consumption, top end still healthy after running 400whp at 7500 rpm for a while, leads us to believe we can make it work. Bottom end is the weak link in our build and I feel it's simply our implementation. IOW, the failure is not endemic, we are simply doing it wrong. There are a few BP motors out there making 550-650whp with many runs without bottom end failure. Power density of a boosted BP is not far from an LS race motor, even when I/C and intake plumbing is factored in. But yeah, not constrained to a BP, we would build a 6.0L LS dry sumped race motor of around 700whp. Or more accurately, we would have Katech build it for us.
But yeah, if we someday win the overall and reset the production car lap record at around 1:36 with a BP, that would be a day of days.
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#204
I looked at buying a NASCAR engine at some point, 830-850 HP all day long.
With that said, it's also north of 500 Lbs and will package horribly into the nose of the car, screwing up the weight balance and aero big time...
Small boosted engines are a very good way to make power with relatively low weight and good packaging, that's why you see them on time attack cars but also on the Porsche 919 LMP1.
With that said, it's also north of 500 Lbs and will package horribly into the nose of the car, screwing up the weight balance and aero big time...
Small boosted engines are a very good way to make power with relatively low weight and good packaging, that's why you see them on time attack cars but also on the Porsche 919 LMP1.
#205
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You see, most of the parts that regular track day enthusiasts are buying from these vendors were developed on the track because these vendors and others raced their cars. If Emilio develops additional parts that aid in high-horsepower longevity in the motors that many of us use then they will likely trickle down into marketable components. This is especially true now that we have more reliable options for transmissions.
How many sets of hood vents have been sold after they were designed by The Pass to solve a problem he was having on the track?
How many sets of hood vents have been sold after they were designed by The Pass to solve a problem he was having on the track?
#207
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I think two other drivers deserve big acknowledgement from this event. Tarek Latouf (white car pictured in prior posts) ran a 1:54.857 in Limited, that's faster than I ran in my first year at SLB in 2014. Great time for a first effort (that I'm aware of) in GTA. In Unlimited RWD, Ulrik Szirka (redish car below) did a 1:51.856 in his turbo 1.6L making 380whp. I'm not sure how that engine or trans held together but that would have been the Miata lap record just a few years ago, and is the 5th fastest Miata to lap Buttonwillow 13CW today. Monster time to come out of nowhere with. Congrats to both guys.
#208
Thanks Ryan!
It was my first effort to run my car at SLB. i was on a pit team for the last 2 slb events, so i got to see what works and doesnt work as far as the car goes. I for sure had the wrong tire choice on my car for outright time, but getting laps in for me was the most useful thing. i clocked about 40 laps this year total after not driving the track since 2013. Worked my way down from a 2:10 a few weeks prior down to my 1:54.857 during SLB.
Next year ill come with more aero, a few tweaks and better tires for the event and see what i can put down. Shooting for sub 1:50!
It was my first effort to run my car at SLB. i was on a pit team for the last 2 slb events, so i got to see what works and doesnt work as far as the car goes. I for sure had the wrong tire choice on my car for outright time, but getting laps in for me was the most useful thing. i clocked about 40 laps this year total after not driving the track since 2013. Worked my way down from a 2:10 a few weeks prior down to my 1:54.857 during SLB.
Next year ill come with more aero, a few tweaks and better tires for the event and see what i can put down. Shooting for sub 1:50!
#209
Honestly though, scope creep is my biggest issue. I'm beginning to think I prefer fabricating to racing...
#211
"In Unlimited RWD, Ulrik Szirka (redish car below) did a 1:51.856 in his turbo 1.6L making 380whp"
Step very carefully away from the keyboard Ryan. You are VERY close to upsetting many people here.
A mass loss of cats and potential ban are next!
BUT I couldn't agree more with you, incredible how the whole Miata knowledge base is steaming forward.
Our 1600 turbo (270 whp) was a LOT of fun to drive and in some ways I still miss it.
Step very carefully away from the keyboard Ryan. You are VERY close to upsetting many people here.
A mass loss of cats and potential ban are next!
BUT I couldn't agree more with you, incredible how the whole Miata knowledge base is steaming forward.
Our 1600 turbo (270 whp) was a LOT of fun to drive and in some ways I still miss it.
#213
My best guesstimate is 470# or so depending on how its dressed and what's been done to the block. My block has had machine work done around the pan rail that took some weight out, and while the heads are physically larger, it's close due to the amount of material missing from the ports and valvetrain area. Intake is a wash, reciprocating assembly is lighter than most (knife edged crank, etc.). External oil pump vs full dry sump saves some more weight, then there's choice of alternator, pulleys, etc. that will move the number around.
#214
"In Unlimited RWD, Ulrik Szirka (redish car below) did a 1:51.856 in his turbo 1.6L making 380whp"
Step very carefully away from the keyboard Ryan. You are VERY close to upsetting many people here.
A mass loss of cats and potential ban are next!
BUT I couldn't agree more with you, incredible how the whole Miata knowledge base is steaming forward.
Our 1600 turbo (270 whp) was a LOT of fun to drive and in some ways I still miss it.
Step very carefully away from the keyboard Ryan. You are VERY close to upsetting many people here.
A mass loss of cats and potential ban are next!
BUT I couldn't agree more with you, incredible how the whole Miata knowledge base is steaming forward.
Our 1600 turbo (270 whp) was a LOT of fun to drive and in some ways I still miss it.