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Tech Talk
| Page: | 1 |
| #1 PCR SLM | |
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| wilkerson99
Posts: 23 02/06/2012 7:33 PM |
This is our first year of racing cars and just looking for any advice.
Car is 06 portcity, track is 1/2 mi high banked in al. lf and rf bump stops set up by RE Suspension pro dbl adj shocks set up by RE Suspension 150#lf 175#rf 175#lr 300#rr springs 1 3/16 splined sway bar 57.8 % left 51% nose 57.5% cross with 2 rounds in bar with driver in car lf camber +9.5* rf camber is -3.5* caster is lf 2 and rf 3 lr trailing arm level rr trailing arm up hill 1* panhard bar is 10.5" rear end and 12"on frame side. stagger is 2" front and rear 5.5 wheel back spacing on lefts and 4" on the rights sat feb 11 will be my first time in the car and just wondering if there is anything we may need to look at. we have talked to Harley at Port City a few times but sometimes racer feed back is more positive. Thanks again in advance Eric.. |
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| #2 Re:PCR SLM | |
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| slmracer
Posts: 45 02/07/2012 5:31 PM |
Man that's alot of cross I have a 2010 portcity and I tried 57% and man it was just to tight. The car felt bound up. I wish you luck and give us some feed back
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| #3 Re:PCR SLM | |
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| murray
Posts: 316 02/07/2012 6:18 PM |
Quote posted by slmracer: Man that's alot of cross I have a 2010 portcity and I tried 57% and man it was just to tight. The car felt bound up. I wish you luck and give us some feed back
Did you try anything else and if so what was the result? Anyone have a newer pcr that doesnt push? If so, what cross? |
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| #4 Re:PCR SLM | |
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| wilkerson99
Posts: 23 02/07/2012 7:26 PM |
Thanks for the input. What would you think would be a good starting point for the cross? I will start with what we have and see how it feels. Thanks for the advice and i will let ya know...
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| #5 | |
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| TerribleTim68
Posts: 4863 02/08/2012 9:05 AM |
I don't have a Port City, but that seems like a TON of cross for that setup. If it was me, I'd start at 50% cross and add bar until you get to 52% and see how it feels.
Again, that's just me and what I do with my car (it's a Lefthander that occasionally turns right  ). |
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| #6 | |
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| cmac75
Posts: 37 02/08/2012 2:59 PM |
54% 150 in lr.
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| #7 Re: | |
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| wilkerson99
Posts: 23 02/08/2012 5:45 PM |
Thanks again for the replys. Im gonna rescale tomorrow and will lower the cross and maybe start at 52-54. We will see how practice goes sat and i will post back.
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| #8 Re: | |
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| slmracer
Posts: 45 02/09/2012 5:52 PM |
Sorry about not posting more info.After we made changes
Springs rf 200 with bs lf 150 with bs lr 150 with bs rr 200 sway bar 1 5/16 3 piece bar wedge 54 with out any pre-load camber lf 7 degree rf 2 degree caster lf 1+ rf 2.5+ the car was much better but going to start off this year with trying a setup that Rock recommended. I agree the new port city cars are hard to make turn but watch one at the governors cup last year in florida just plain smoke everyone so they can be fast just going to take more time to figure out I think. |
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| #9 | |
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| murray
Posts: 316 02/09/2012 6:36 PM |
Rodgers knows that track pretty well. Maybe they do better on 1/2 miles.
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| #10 | |
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| murray
Posts: 316 02/09/2012 6:38 PM |
also he likes to diamond so it suits his style.
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| #11 | |
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| wilkerson99
Posts: 23 02/09/2012 7:27 PM |
what kinda starting air pressure and split from left to right?
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| #12 Re: | |
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| slmracer
Posts: 45 02/10/2012 4:42 PM |
It wasn't rogers and he doesn't have a port city. It was some young kid from Wis. that just smoked the field
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| #13 Re: | |
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| slmracer
Posts: 45 02/10/2012 4:43 PM |
Quote posted by wilkerson99:what kinda starting air pressure and split from left to right?
25 rights 15 lefts this is for a 25 lap race |
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| #14 Re: | |
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| slmracer
Posts: 45 02/10/2012 4:46 PM |
The kid's name is EriK Jones and his from Byron, MI
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| #15 Re: | |
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| wilkerson99
Posts: 23 02/10/2012 5:42 PM |
Quote posted by slmracer:Quote posted by wilkerson99:what kinda starting air pressure and split from left to right?
25 rights 15 lefts this is for a 25 lap race Thanks slmracer, we are going to practice tomorrow if the rain quits. i will try the 15/25. all of our races are 100 laps.. |
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| #16 Re: | |
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| Rock
Posts: 2080 02/10/2012 8:36 PM |
Quote posted by slmracer:Quote posted by wilkerson99:what kinda starting air pressure and split from left to right?
25 rights 15 lefts this is for a 25 lap race Wilkerson99, these would be close starting pressures, but you can only set them correctly with tire temps, it all depends on the driver driving style and how good the car is handling. Rock |
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| #17 | |
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| wilkerson99
Posts: 23 02/11/2012 5:33 PM |
Well, first day of practice is over and it was a blast. car wasnt bad at all or not as bad as my driving
 Need just a little more rotation in the middle and a camber change in the rf which may help the front grip. Tires also changed size once they had heat on them so we didnt end up with the rear stagger we wanted but all in all it was a good day. Ended up running some 17.8's last round of practice with around 45-50 laps on the tires. Thanks again for the advice everyone has given it sure helped. |
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| #18 Re: | |
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| slmracer
Posts: 45 02/12/2012 4:52 AM |
Quote posted by Rock:Quote posted by slmracer:Quote posted by wilkerson99:what kinda starting air pressure and split from left to right?
25 rights 15 lefts this is for a 25 lap race Wilkerson99, these would be close starting pressures, but you can only set them correctly with tire temps, it all depends on the driver driving style and how good the car is handling. Rock Rock is correct that is just starting pressures you will need to use tire temps to get it right. Sorry |
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| #19 | |
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| Stage1
Posts: 142 02/12/2012 8:20 AM |
You don't say which bumps you are on but try harder duro's on RF for center rotation. We ran a PC last few years and ended up 200's across front w/ 1 3/8's bar. Track size and driver will determine final setup everytime. You can also try more angle in rear arms. We ended up 3* LR/ 2* RR and won the night we added angle. Trail and error..
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| #20 Re: | |
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| wilkerson99
Posts: 23 02/12/2012 9:31 AM |
We did keep records of tire temps and make only a few changes. I aslo wondered about the stiffness of the bump rubbers. RE installed the purple roller skate type which i think duro 60 on both fronts. Seems kind soft for the speed you carry into the corners. Would going to say a 70 rubber on the rf make that much of a noticable diff?
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| #21 | |
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| Lensing18
Posts: 6 02/13/2012 3:24 PM |
Usually if you are turning right the car is turning too good. Add some wedge!!!
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| #22 | |
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| wilkerson99
Posts: 23 02/13/2012 7:09 PM |
How do you use rear spring travel to figure ta angles and should
they be set with driver in the car or out? |
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| #23 | |
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| tucker16t
Posts: 254 02/14/2012 1:15 PM |
Anything you are adjusting on the car I have the driver or some one simular in weight to the driver in.
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| #24 | |
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| wilkerson99
Posts: 23 02/17/2012 7:04 PM |
what about a rr spring change? currently have a 185 lr 300 rr. would a stiffer rr take grip away from that tire and help car turn at center?
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| #25 | |
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| murray
Posts: 316 02/18/2012 10:51 AM |
Have you tried lowering the panhard?
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| Page: | 1 |
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