Parr or JZM - Guidance Sought Please
Discussion
I know this has been discussed before and I am aware that people tend to sit in different camps here, but in the new year I am going to embark on some minor mods to my Mk2 GT3 starting with a suspension set up. My mix is probably 90% road and 10% track at this time so I am much more interested on improving its road manners first and then maybe moving to some more track focus as I get used to the car. Start small, understand the impact, then develop and evolve it is my plan.
I have spoken to Parr and to JZM who seem to be the recognised players in the UK when it comes to GT3 work and now I have to choose which route to take. I am sure both will be excellent but I would appreciate peoples comments, ideally those who have worked with both. I am happy to take emails on this (via profile) if people don't wish to go public and I am looking for constructive input and would love to know how they differ?
I emphasise at this time I am not looking to start swapping bits, that will come, but first off I am looking at improving the stock set up by dialling out understeer and improving initial turn in feel. Thanks in advance!
I have spoken to Parr and to JZM who seem to be the recognised players in the UK when it comes to GT3 work and now I have to choose which route to take. I am sure both will be excellent but I would appreciate peoples comments, ideally those who have worked with both. I am happy to take emails on this (via profile) if people don't wish to go public and I am looking for constructive input and would love to know how they differ?
I emphasise at this time I am not looking to start swapping bits, that will come, but first off I am looking at improving the stock set up by dialling out understeer and improving initial turn in feel. Thanks in advance!
batman69 said:
Sounds like your first change will simply be getting the geo changed for a bit of track work. Both Parr and JZM can do this very easily. The different routes will be if you choose to replace dampers etc then the discussion starts - in summary spend the money on driver training!
The "spend money on driver training" is often appropriate, though somewhat asumptive don't you think? I did my formal track driver training 22 years ago, and have been learning ever since, so pretty safe to assume I am now ready to move to the next level and make a few changes....
Thanks Dan, but as I was saying I am looking to keep it standard for now, not change components (that may well come later). I appreciate the limitations of this approach, but phase 1 for me is to get the stock set up improved for road use. I hoon a lot you see, so being able to drive into the Alps and enjoy the car to its maximum on the road is where I am at right now.
DanH said:
Well in that case pick who you want. The only factor to consider is that the Parr setup widens the front track with spacers, but that will require your wheel arches to be rolled. Personally I was keen not to mess so went to JZ.
Ah, now we are getting there. What I want is input on how they differ and finally I am getting that. Thanks again Dan. I appreciate there a loads of you who want to change all sorts, and in time that will come, but right now I am working on a KISS basis....
Same here, I live in the Midlands so Parr's are a right treck for me too. JZM have been very good on the communication front in my experience and so have Parr's so I can't differenciate either on that front. JZM is looking favourite right now simply due to location and the fact that both seem able to deliver in the area I am looking.
Thanks slippy, excellent feedback and really where I am at now. It needs to be taken to the next level and needs to have the Porsche 'safeness' (I am being polite!) dialled out. Your summary of the driving experience is spot on and reflects what I am finding. Still love it, but I am well aware it can be improved hence this post really.
Great stuff guys, excellent input and just the type of feeback I was looking for. Reducing the ride height much more is likely to be an issue for me as I can only just get in and out of my driveway, which is half a mile long (not all my land!) with a cattle grid at each end and a gradient, so reducing it too much more may give me issues.
Forgive my ignorance, but explain rolling the rims?
Forgive my ignorance, but explain rolling the rims?
I guess I am not expecting to remove the tramlining or fidgeting over the bumps, that as they say is the nature of the beast and I love it more for it, but I do want to remove that vague feeling at initial turn in and dial out as much of that initial understeer as possible. I will provide a full update report after the work is done!
Edited by housemaster on Friday 8th December 17:28
slippydiff said:
housemaster said:
I guess I am not expecting to remove the tramlining or fidgeting over the bumps, that as they say is the nature of the beast and I love it more for it, but I do want to remove that vague feeling at initial turn in and dial out as much of that initial understeer as possible. I will provide a full update report after the work is done!
Edited by housemaster on Friday 8th December 17:28
HM, In comparison with the MK1 the MK2 is rock steady when it comes to tramlining and fidgiting over bumps !
What is really noticeable on the MK1 as previously mentioned, is how sharp the initial bite is on turn in when compared to the MK2 I drove.
Steve R , can this be dialled out to the degree that the MK2 can be made to feel like the older car ?
I thought Porsche had possibly realised this was an "issue" on the later car and had addressed it by modifying the hubs/uprights on the GT3 RS ?
HM, when are you booked in at JZM ?
Monday 18th, I plan to spend the day there and observe, pop down for a coffee if your about!
Steve
Edited by housemaster on Friday 8th December 18:10
batman69 said:
Housemaster
Didn't intend to criticise your pedalling abilities, seen too many posts about people with deep pockets looking to go faster when the weakest link is the driver. My MK1 has the Parr Stage 1 setup and I like it. Have done 5+ trackdays this year and the lack of understeer suits me. Will have to improve my pedalling abilities before I debate the finer points of suspension adjustment.
regards
Michael
Didn't intend to criticise your pedalling abilities, seen too many posts about people with deep pockets looking to go faster when the weakest link is the driver. My MK1 has the Parr Stage 1 setup and I like it. Have done 5+ trackdays this year and the lack of understeer suits me. Will have to improve my pedalling abilities before I debate the finer points of suspension adjustment.
regards
Michael
No worries Michael, I do have very deep pockets, but the problem is there is just fluff at the bottom of them!
My ambition has always been to refine my car in small and simple stages to eradicate some of the less appealing traits. I bought the GT3 for its purity and driver satisfaction with the aim of doing lots of 'hoons' and some track work. My ego is pretty much in check so I am not looking to be the quickest out there, though I know the basics of making a car go quickly and have done quite a bit of track work in the distant past.
I plan to start small and understand how that impacts my car and then progress from there. At the end of the day I am not looking to pull sub 8 minute laps of the Ring in my car for the simple reason I can't afford to. The GT3 is mainly a road car with some track work planned, and I don't see that changing anytime soon, so my focus is making it the best possible road car I can with an eye to some track work. It will always be a comprimise though one I am very happy with!
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