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Scca E Prod slick size


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#1 plygasser47

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Posted 12 April 2017 - 06:05 PM

Hello,

 

I am currently building a 1973 240z E prod car. I am running 15x7 wheels according to the SCCA GCR. Could someone please point me in the right direction for tire size?

 

Thank you



#2 Chickenman

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Posted 12 April 2017 - 08:06 PM

Goodyear G19 Radial Cantilever. 23.0 x 9.0 -15 Purpose built for E-Prod . Cantilever sidewall tire made to fit on 7" E-Prod rim. available in both Dry and Rain tires.

 

http://www.racegoody...atalog_2015.pdf


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#3 Ben280

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Posted 13 April 2017 - 09:12 AM

I'd look into Hoosier R7's. A 225/45R15 will fit nicely on a 15x7, and is 22.8" tall for nice gearing. Tread width is 8.6" Fairly inexpensive option at $260/each. 

 

https://www.tirerack...ZR5R7&tab=Sizes

http://www.hoosierti...Web 3 29 17.pdf

 

Another good option if you are concerned with budget (not sure about skill level/experience/wallet size etc) would be Spec Miata takeoffs which are the right size (205/50R15) and should be really inexpensive. 

 

http://www.jbracingtires.net/ John is a great resource for used tires if you can't find anybody local to you that uses them. 



#4 plygasser47

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Posted 16 April 2017 - 02:19 PM

Thank you for your help. The car is mostly together now with a few pieces and parts to go along with a trip to the paint booth.  



#5 Chickenman

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Posted 16 April 2017 - 06:07 PM

John Berget tire is a great place to buy used slicks. Particularly this time of year. He usually has scuffs available with as little as 10 laps. Usually in bigger Pro Sizes though. He may have some E-Prod cantilevers used. Give him a call. 



#6 gira

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Posted 11 May 2017 - 03:49 PM

plygasser47,

 

Let me put in my two cents worth. They're not "EP" tires, as these size tires can be run in many classes. So there is not such thing as an EP tire.

 

My favorite of all time the Goodyear 1782. Its a bias slick. If you want to lay down some fast times, use these. Goodyear is struggling with trying to get back into SCCA and doesn't really have their new compounding finished yet.

 

The Hoosier R7 is a great tire, and my next favorite. It's a grooved DOT spec tire and you probably should run a slick since you're allowed.

 

 

Hoosier makes a slick radial too called the S80. This tire never worked that great on the Z. Don't ask me to explain, I just couldn't get anywhere near the grip with that tire as I could with the cantilever. The sidewall is so soft that you'll have to change your spring rates big time. The lotus, and the miatias have reacted well to this tire but I proved to myself that Hoosier went backwards for me when they went from the Hoosier r80 to the s80.

 

 

 

The setups between the cantilever and the radial are totally different, so I recommend choosing what's best for you and sticking with it.

 

 

Fast laps- GY1782  430 compound

longevity -Hoosier S80

longevity--hoosier r7

 

Greg Ira



#7 jhm

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Posted 12 May 2017 - 06:49 AM

JBRacing is good, and here's another one worth checking (especially for cantilever slicks):  http://stores.ebay.c...sid=p4340.l2563.



#8 RebekahsZ

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Posted 15 May 2017 - 12:37 AM

www.usedracingtires.com
Jpglobal.com

I've been able to buy single, slightly used A6 and A7 from them for as little as $75 shipped. Tell them what you are doing and ask for the freshest tire they have. Age matters as much as wear.

1972 240z, purchased in 1991 for $900. Bone stock LS2/T56/DBW from 2006 GTO, swap completed in 2011. 400rwhp/435 rwtq. 2400# minus driver. JCI swap, Mantic ER2 clutch kit, JTR headers, single exhaust, Borla muffler, MGW shifter, M2 Differentials shortened Z31 CV axles, Z31 CLSD R200, Chequered Flag Racing billet stubs and companion flanges. MSD 2-step, Hurst roll control, both operated from switches on clutch pedal. 9" Hoosier drag slicks on Weld Draglites, 245/45/16 Hoosier A6/R6 on 16X8+10 Rota RBR. 225/250 sectioned coilovers, Koni 8610-1437RACE shocks, DP and EMI camber plates, MM shortened rear control arms, TTT front control arms, poly and aluminum bushings. Top speeds: Ohio Mile 174mph, C/GMS class record holder, best 1/8 mile 6.96 at 100mph, best 1/4-mile 11.0 at 126mph, best 60' 1.43, best 1/2-mile 148mph at GA 1/2-mile. Home Track-Jake's Dragway, Moulton, AL. SCCA autocross club - TVR, Huntsville, AL. Lets race!


#9 plygasser47

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Posted 3 weeks ago

I ended up going with used Hoosier 23.0x 9.5-15. They just fit on the car. I have drivers school in August and hopefully at least one race in September. So if I destroy a tire I won't feel so bad.

 

Thanks for all of the help.

 

Dave Hopkins



#10 Chickenman

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Posted 3 weeks ago

I ended up going with used Hoosier 23.0x 9.5-15. They just fit on the car. I have drivers school in August and hopefully at least one race in September. So if I destroy a tire I won't feel so bad.

 

Thanks for all of the help.

 

Dave Hopkins

Have fun. There is nothing like a gummy set of real Road Racing slicks on a warm day to make you smile. When you start pulling both inside wheels at an Autocross, you know you have some serious grip!!!






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