Another completed DeMan 4.5L 718 - Impression/review!
02-08-2023, 10:42 PM
#406
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ducsfly (02-08-2023)
02-08-2023, 11:05 PM
#407
Deman catless headers and tune
Hey rick, I just picked up my 981 gt4 how much is a deman catless header and cobb accessport tune and install at your shop and what are the hp and torque gains with the stock porsche sport exhaust? Do you recommend installing the bmc filters with this set up also?
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Rick DeMan (02-09-2023)
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02-08-2023, 11:41 PM
#409
02-09-2023, 10:53 AM
#410
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2016 GT4-R
Rick DeMan
DeMan Motorsport
Upper Nyack, NY
845 727 3070
Porsche Sales & Service
Porsche Race services and parts
www.DeManMotorsport.com
2016 GT4-R
Rick DeMan
DeMan Motorsport
Upper Nyack, NY
845 727 3070
Porsche Sales & Service
Porsche Race services and parts
www.DeManMotorsport.com
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JAhmed (02-09-2023)
02-09-2023, 10:54 AM
#411
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03-01-2023, 06:07 PM
#412
Rennlist Member
Quick question: I have an inbound spyder and was hoping to get an exhaust now and do the DeMan 4.5L upgrade down-the-road (in 6-12 months). Which exhausts (DeMan or other brands) do you all recommend for the best combination of "power" and noise quality (GT3-like shriek) for 4.0 and 4.5L?
Was initially thinking either:
1. JCR valved silenced backbox + Dundon headers/OAPs
2. Kline inconel OAPs/backbox + DeMan headers
That said, open to other options
Was initially thinking either:
1. JCR valved silenced backbox + Dundon headers/OAPs
2. Kline inconel OAPs/backbox + DeMan headers
That said, open to other options
03-30-2023, 10:15 AM
#413
Rennlist Member
What's better than the DeMan 4.5L?
Having (2) DeMan 4.5Ls. In his podcast, Matt talks about visit with Tom Segura, who has 718 GT4 4.5, and a GT3 4.5, and talks about some of the engine/performance differences, M-Engineering tuning, and insights from from DeMan. I believe a drive/review video of the visit is en route. Podcast link below should be queued to subject so not to worry about seeing Matt's "horrible Spyder spec" 
:
:Last edited by colnagoG60; 03-30-2023 at 10:16 AM.
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04-19-2023, 01:06 PM
#414
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Segura's video with Matt...Segura has 4.5s in both a Touring and GT4:
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04-19-2023, 09:17 PM
#415
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04-19-2023, 09:19 PM
#416
I haven't heard great things about DeMan to take this endeavor. His hp claims are based on 98 octane on top of that. Not really worth the money and you can get close with safe bolt on and tunes.
04-19-2023, 09:22 PM
#417
Instructor
You "haven't heard great things about DeMan?" ....I think you are in the significant minority based on threads here....
What are you referring to specifically?
What are you referring to specifically?
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Rick DeMan (04-20-2023)
04-19-2023, 09:41 PM
#418
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04-19-2023, 09:47 PM
#419
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04-19-2023, 09:48 PM
#420
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