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RCR Forum - RCR40/SLC/917/Superlite Aero Sponsored by Race Car Replicas.

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Old 12th November 2017, 05:00 PM   #101
V12Esprit
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Re: possibly the sickest engine/tran package for an SLC ??

Top of my list for domestic V8 would have to be the Ford Voodoo - IF only you could buy one! Only source would be a GT350 mustang.
DOHC, Flat Crank, 8200 rpm, 540hp with room for more.
Must be said though, the LS fits the bill perfectly for 3 very sensible reasons - power, cost, and reliability!
Some of us just arent very Sensible when it comes to these things - first and formost myself!
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Old 30th November 2017, 12:05 PM   #102
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Re: possibly the sickest engine/tran package for an SLC ??

I like a low mass engine. What’s the minimum hp to justify 325/30-19?
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Old 30th November 2017, 07:33 PM   #103
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Re: possibly the sickest engine/tran package for an SLC ??

Quote:
Originally Posted by mpg View Post
I like a low mass engine. What’s the minimum hp to justify 325/30-19?

630/570.
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Old 4th December 2017, 02:05 PM   #104
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Re: possibly the sickest engine/tran package for an SLC ??

WHich is lighter; an LS3 or a 20B?
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Old 10th December 2017, 10:59 AM   #105
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Re: possibly the sickest engine/tran package for an SLC ??

Quote:
Originally Posted by mpg View Post
WHich is lighter; an LS3 or a 20B?
Chris, a lot would depend on what material you build your 20B out of. If you build the 20B out of aluminum, it will be a lot lighter. If you build it out of Mazda's iron housings, it will be heavier.

Racing Beat offers aluminum housings. Racing Beat - Mazda Performance Specialists
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Old 10th December 2017, 01:19 PM   #106
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Re: possibly the sickest engine/tran package for an SLC ??

Quote:
Originally Posted by Bassanio et Portia View Post
Chris, a lot would depend on what material you build your 20B out of. If you build the 20B out of aluminum, it will be a lot lighter. If you build it out of Mazda's iron housings, it will be heavier.

Racing Beat offers aluminum housings. Racing Beat - Mazda Performance Specialists
Thanks Les
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Old 10th December 2017, 01:48 PM   #107
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Re: possibly the sickest engine/tran package for an SLC ??

Pretty much have settle on a BMW S85. Now looking for a 6+ speed sequential paddle shift. Suggestions?
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Old 10th December 2017, 04:25 PM   #108
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Re: possibly the sickest engine/tran package for an SLC ??

Quote:
Originally Posted by David Sexton View Post
Pretty much have settle on a BMW S85. Now looking for a 6+ speed sequential paddle shift. Suggestions?

Quaife/RPE 7-Speed Sequential Ultra-Compact Transaxle Gearbox - Spur

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Old 10th December 2017, 04:57 PM   #109
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Re: possibly the sickest engine/tran package for an SLC ??

Thanks Ian. Very different looking gearbox. Rated at 450hp with 7 speeds, unless you change it to a 5 or 6 speed. Not necessarily a bad thing mind you. Do you know if it has a reverse? Don't see it in the specs.
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Old 10th December 2017, 05:31 PM   #110
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Re: possibly the sickest engine/tran package for an SLC ??

Quote:
Originally Posted by David Sexton View Post
Thanks Ian. Very different looking gearbox. Rated at 450hp with 7 speeds, unless you change it to a 5 or 6 speed. Not necessarily a bad thing mind you. Do you know if it has a reverse? Don't see it in the specs.
I know nothing more than I have read about it
New Quaife Quantum transaxle info
Shows one in a GT40 being hustled around Brands Hatch
Perhaps send a PM to Mike Pass and ash him about it

And
New Quaife gearbox tested in GT40

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Last edited by IanAnderson; 10th December 2017 at 05:37 PM.
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Old 10th December 2017, 05:35 PM   #111
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Re: possibly the sickest engine/tran package for an SLC ??

Quote:
Originally Posted by David Sexton View Post
Pretty much have settle on a BMW S85. Now looking for a 6+ speed sequential paddle shift. Suggestions?
After speaking with all of the transaxle manufacturers at the PRI show this week, I was very impressed with the units from Fortin.

Welcome to Fortin Racing

Hollinger makes some really nice stuff as well.

Holinger


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Old 11th December 2017, 12:30 AM   #112
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Re: possibly the sickest engine/tran package for an SLC ??

Thanks Ron. Both look interesting, but the Fortin is definitely spendy!
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Old 11th December 2017, 08:04 AM   #113
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Re: possibly the sickest engine/tran package for an SLC ??

I drove that Gearbox in their GT40. It is a stonking gearbox, really well thought out and very strong. Very easy to change the ratios. And yes it has reverse.

You have a PM Dave.
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Old 13th December 2017, 02:16 PM   #114
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Re: possibly the sickest engine/tran package for an SLC ??

More for us to think about with the BMW V-8.
Quote:
. . . the engine—the 2018 M5 uses the same basic powerplant as the 560-hp 2011–2017 M5, mildly updated. It is now a 600 hp, twin-turbo, 4.4-liter V-8 known within BMW as the S63B44T4. S is the typical designator for production M engines (ordinary BMW motors use the prefixes N, M, or B). The second number is displacement—the M5’s engine is 4.4 liters. The T bit represents a technical update—this is the fourth major update the S63 has received since the design was launched, in the 2010 X5 M and X6 M. (The changes for the ’18 M5 are in detail: new turbochargers with larger compressors, a new oil pump, and so on.)

The S63 is a neat mill. Its layout is colloquially referred to as “hot vee”—the engine’s exhaust manifolds rest inside the vee made by the the cylinder heads and block, as opposed to outside it. The engine's intakes live on the side of each head—the place where a traditional vee engine puts its exhaust. This sort of setup is occasionally referred to as “reverse flow,” because it mirrors how the majority of vee engines, automotive or not, have operated for the past century. BMW chose it to maximize responsiveness; the layout allows for a clever (and patented) exhaust manifold that would be practically impossible in a cold-vee setup. Along with a nontraditional firing order, the arrangement allows the engine’s turbochargers to be fed exhaust pulses at even intervals. Which results in more linear power delivery—and less turbo lag.

Short version, made palatable for people who aren’t tech doofuses: The S63 is built in a cool, nontraditional way, chasing linear response, a BMW hallmark.

Like its predecessor—like every S63—the new M5’s engine produces torque everywhere. Virtually any point on the tach, in buckets, great flowing gobs of the stuff. It is a firehose of violence. In terms of power delivery and character, it is one of the great modern engines, a shocking combination of linear thrust and willingness to rev. There is lag, but it is so minimal that you barely notice.

. . .

. . . power isn’t that much different—the F90’s 600 hp was essentially matched by the 600 hp in the F10 Limited Edition—but its delivery seems to have been massaged to be smoother . . .
From a Road & Track article on the latest BMW M-5.
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