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Engine, Exhaust, Transmission Discuss the FR-S | 86 | BRZ engine, exhaust and drivetrain. |
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07-06-2017, 06:57 PM | #1 |
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Piper Cam Selection
Has anyone fitted a set of the ultimate street or rally cams from Piper to an NA engine and can comment on the results they saw?
I am looking at a simple NA build for circuit racin: 8k rev limit (stock bottom end), 2017 intake manifold (limited to stock manifold by regs), EL 4-1 headers, mild port/polish to clean up the stock castings, cams, valve springs. Was thinking the SUBFA20BP300 ("Rally" cam) but unsure if this might be too aggressive. I have been in contact with Piper but they seem very reluctant to provide any selection advice. |
07-06-2017, 07:15 PM | #2 |
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I can.
You really need to be talking to your engine builder to determine what is appropriate for your application. |
07-06-2017, 10:50 PM | #3 | |
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07-06-2017, 11:20 PM | #4 | ||
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The Following User Says Thank You to bju90 For This Useful Post: | Turdinator (07-07-2017) |
07-07-2017, 12:09 AM | #5 | |
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07-07-2017, 03:02 AM | #6 | |
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Exhaust Flow @ .500 = 220 Intake Flow @ .500 = 305 Exhaust manifold - Only limited by the imagination, Ace, SME or make my own if need be. I am starting to think the ultimate road is the safer bet. Can sit here and do all the calculations and research in the world but until they are installed I wont know the result. Hence why some one with real world experience would be nice to chime in but no one wants to open up including piper. |
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The Following User Says Thank You to bju90 For This Useful Post: | Scrappydoo (07-07-2017) |
07-07-2017, 03:43 AM | #7 | |
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It does seem frustrating even from reading this post. I suspect you are asking a question that nobody has the individual experience or knowledge to answer hence the marked reluctance to actually provide any useful information. You may just have to suck it and see |
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The Following User Says Thank You to Scrappydoo For This Useful Post: | bju90 (07-08-2017) |
07-07-2017, 04:21 AM | #8 | |
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I was hoping Piper or their distributors on the board could chime in with something but evidently not. Only testing is the German guys who broke 2 sets. They appear to be largely untested I guess, even pipers response via email "We do not have any dyno test results in house as we are a manufacturing plant, but I can request some information from previous customers supplied" Never came back with anything in the end. This was supposed to be a stepping stone to a larger project but looks like I will have to go further down the path of education on cam design earlier than I had hoped to meet my needs. Probably better to get something custom made locally. |
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The Following User Says Thank You to bju90 For This Useful Post: | Scrappydoo (07-07-2017) |
07-07-2017, 05:53 AM | #9 |
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Have you spoken to @Tim Radley he seems to have some experience with Piper Cams.
See this thread: http://www.ft86club.com/forums//show...t=91080&page=2
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The Following User Says Thank You to Turdinator For This Useful Post: | bju90 (07-08-2017) |
07-07-2017, 06:22 AM | #10 |
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Good find! I think id be best with the ultimate road and hope the 2017 manifold flows better.
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07-07-2017, 11:30 AM | #11 | |
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07-07-2017, 11:59 AM | #12 |
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@bju90 I am using the stg3 cams in my built motor. The results were disappointing. The shape of the torque curve did not change from stock. Current theory is the intake manifold is the bottleneck.
Pm me if you want more specifics.
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07-07-2017, 12:01 PM | #13 |
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Any input on one of these cams with FI??
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07-07-2017, 01:57 PM | #14 |
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