Justin Posted October 14, 2004 Share Posted October 14, 2004 Is there a problem with putting 17" rear drag wheels and tyres on my car and leaving the 18" front wheels on? Just for drag racing not street use. The reason is that the fronts have 6 pot AP brakes that no 17" wheel is going to fit over. Cheers Justin Quote Link to comment Share on other sites More sharing options...
Supraguy Posted October 14, 2004 Share Posted October 14, 2004 Not a problem at all for the drag strip. Most big HP cars use J-spec rear brakes to allow 15" wheels for Drag Slicks. Quote Link to comment Share on other sites More sharing options...
Justin Posted October 14, 2004 Author Share Posted October 14, 2004 Cool, good news thanks man Just need to find a pair of suitable 17" wheels for dragging now. Quote Link to comment Share on other sites More sharing options...
dude Posted October 14, 2004 Share Posted October 14, 2004 Originally posted by Supraguy Not a problem at all for the drag strip. Most big HP cars use J-spec rear brakes to allow 15" wheels for Drag Slicks. yes J but be warned that there is very little clearance with 15's and J-spec brakes , its also very hard to find 15" wheels withthe correct inset and stud pattern , i can get these cheap if anyone wants to go that route . dude:flame Dev Quote Link to comment Share on other sites More sharing options...
Justin Posted October 14, 2004 Author Share Posted October 14, 2004 Ah JM just the man. I'm after getting into low 12's and 11's like Mad Monkey Mark. Would 17" wheels with BFG's at the rear be OK or should I look at 16's? I've only got 500bhp ish anyway. What is the benefit of smaller wheels? More low psi rubber spread across the road? Cheers J Quote Link to comment Share on other sites More sharing options...
Thorin Posted October 14, 2004 Share Posted October 14, 2004 Stock 17" rears will be fine IMO, you'll get 275 or 285's on there ok. Stock 17s are cheap too. Quote Link to comment Share on other sites More sharing options...
MONKEYmark Posted October 14, 2004 Share Posted October 14, 2004 i used my old crapper 17" volk split rims. they are a lot of messing about swopping over. as the wheels are totally wrong for car. they have a different stud pattern. so have to bolt on hub relocating spacers then bolt the wheels onto the spacers. they seem light wheels. some americans go with mazda rx7 wheels with drag tyres. think they must be light weight wheels and sure they only 8" wide. johns new wheels with et street tyres are very light weight too. hey justin you only got 500hp what was you wanting to try drag radials or et streets. Quote Link to comment Share on other sites More sharing options...
Justin Posted October 14, 2004 Author Share Posted October 14, 2004 Originally posted by MONKEYmark i used my old crapper 17" volk split rims. they are a lot of messing about swopping over. as the wheels are totally wrong for car. they have a different stud pattern. so have to bolt on hub relocating spacers then bolt the wheels onto the spacers. they seem light wheels. some americans go with mazda rx7 wheels with drag tyres. think they must be light weight wheels and sure they only 8" wide. johns new wheels with et street tyres are very light weight too. hey justin you only got 500hp what was you wanting to try drag radials or et streets. Drag radials like you mate. What's the difference? 500 bhp shocking performance to run a 13.0 best out of 5 runs at Pod at 1.7 bar. Really disappointed and am hoping it was the (not very good) 18" Pirelli PZero's fitted when I bought it that were the problem. I had NOS but didn't use it as I was slipping all over the place 3/4 way down and nearly hit the car in the left lane once. Cheers J. Quote Link to comment Share on other sites More sharing options...
MONKEYmark Posted October 14, 2004 Share Posted October 14, 2004 people dont do too bad on 17" BFG`s some supras have done some serious times on them. 1.4 60 foots is very impressive. have seen some cars over here doing worse on drag radials. gavin l off the other forum was not doing too well on them neither was paul w but both running 6 speed manuals. just get some drag radials and give them a try. i ran mine at 16 psi. have you thought about dropping pressure on street tyres to see if it helps. then pump them back up for on the street. with all your power you should see some great times if you hook up good. Quote Link to comment Share on other sites More sharing options...
Supraguy Posted October 15, 2004 Share Posted October 15, 2004 Drag Radials do make a big difference. I was running just at 500rhhp at 1.3 bar, but on 19" street tyres. That on top of Pod's shitty track and I couldnt get below 12.2, but could not grip traction till nearly the top of 2nd gear. Quote Link to comment Share on other sites More sharing options...
Justin Posted October 15, 2004 Author Share Posted October 15, 2004 Hmmm. I think I'll get the radials. What sort of wheels should I look to buy to fit into the drag tyres? ie one piece 9" wide? Don't want to spend a packet but would like something slightly better looking then stock 17"s. 12.2 was what I was expecting and hoping to get. Was a bit shocked at 13.0 I have to say. I'll stick her on the dyno to check out if anything is dodgy. Quote Link to comment Share on other sites More sharing options...
dude Posted October 15, 2004 Share Posted October 15, 2004 Justin 17's will be fine with 275 dr's , run them at around 12-14 psi , these are what i used on all my runs this year , the advantage of going smaller dia wheel is you get more sidewall on the tyre which wrinkles instead of breaking loose , also 15" slicks etc are easily available secondhand , downside is the car will be a bit scary at the top end of the track . Dude:flame Dev Quote Link to comment Share on other sites More sharing options...
Justin Posted October 15, 2004 Author Share Posted October 15, 2004 Thanks guys you're bloomin helpful. Whilst I have you pro drag racers attention I'd like to run a few thigs past you. Can you look at my spec sheet and tell me where I can improve my QTR's. Obviously tyres is 1, NOS is 2 but suspension and stuff also. Cheers Justin Quote Link to comment Share on other sites More sharing options...
dude Posted October 15, 2004 Share Posted October 15, 2004 Justin , your 60ft times are crap !!!! , you need DR's and some stock UK(soggy)rear shocks , take off the front anti roll bar links , the biggest diff presuming you are auto would be a Hi Stall torque converter , with some practice and setting up the NOS i would say that very low 11's would be poss on a prepped track , lastly and not being funny get your car set up on a dyno as its not making anywhere nerar the 500 hp you list , the terminal says it all 112 is not far off stock hp !!!!, mine traps at around 133mph and thats only 325 rwhp !!! Dude:flame Dev Quote Link to comment Share on other sites More sharing options...
Ian C Posted October 15, 2004 Share Posted October 15, 2004 Perhaps running a maximum 1.4bar may help...? I did some testing and found that 1.3bar gave best power on stock-based hybrids, 1.5bar lost a startling amount of power, so 1.7 - -Ian PS oh yeah, and Pirelli P0's are crap for drag launches as they've got the stiffest sidewells ever Quote Link to comment Share on other sites More sharing options...
Justin Posted October 15, 2004 Author Share Posted October 15, 2004 This is all good feedback folks thanks, just what I was after. So, go to Dyno to see what the hecks goin on. Set boost to 1.4bar (or just turn off DSBC!) Get some 17" BFG drag radials and set em to 14psi P*ss about with me NOS for a bit Get a 4000 HiStall torque converter. Queue up at Pod for 5 hours again to see what the difference is. We have a plan thanks guys. Quote Link to comment Share on other sites More sharing options...
dangerous brain Posted October 15, 2004 Share Posted October 15, 2004 And just out of interest why not go for a pair of stock 16"s??? Most people actually take these down the scrappy so buying them is not an issue. If they go over your brakes you are away with it. OK I know they aint pretty but its only for a few seconds lol. Quote Link to comment Share on other sites More sharing options...
MONKEYmark Posted October 16, 2004 Share Posted October 16, 2004 since when do stock cars trap 112mph??? i have never had that high a trap on stock car more like 104 to 107 mph i aint got a clue what power mines running. when i started racing it with no experience i used to get 14 second times. then with practice and a few mods got it down to what it is now. quiet impressed with the car with no electronics like boost controller and fueling. still on 440cc injectors and stock ceramic turbos. i know i am pushing luck. think next time with a bit of weight reduction and headlight out and rear seat out and a touch more boost could hope for a mid 11 at best. i ran the drag radials at 16psi been chatting to an australian guy in a cheap as chips skyline who runs 10.02 and he said to run drag radials at 10 psi. he is looking into getting me a nos kit with bottle warmer. justin your car has lots of mods so you should see some good times if you go with a tc and dr`s its quite strange the big power cars only running 11`s and 12`s they should be well into the 10`s with 800+ hp im very happy with mine at the min as its not too far behind cars with loads of money spent on them with all the fancy electronics and standalon ecu`s hope when i come to getting single turbo fitted i dont end up running 13`s or i will drive it off a cliff Quote Link to comment Share on other sites More sharing options...
dude Posted October 16, 2004 Share Posted October 16, 2004 Originally posted by MONKEYmark since when do stock cars trap 112mph??? i have never had that high a trap on stock car more like 104 to 107 mph i aint got a clue what power mines running. when i started racing it with no experience i used to get 14 second times. then with practice and a few mods got it down to what it is now. quiet impressed with the car with no electronics like boost controller and fueling. still on 440cc injectors and stock ceramic turbos. i know i am pushing luck. think next time with a bit of weight reduction and headlight out and rear seat out and a touch more boost could hope for a mid 11 at best. i ran the drag radials at 16psi been chatting to an australian guy in a cheap as chips skyline who runs 10.02 and he said to run drag radials at 10 psi. he is looking into getting me a nos kit with bottle warmer. justin your car has lots of mods so you should see some good times if you go with a tc and dr`s its quite strange the big power cars only running 11`s and 12`s they should be well into the 10`s with 800+ hp im very happy with mine at the min as its not too far behind cars with loads of money spent on them with all the fancy electronics and standalon ecu`s hope when i come to getting single turbo fitted i dont end up running 13`s or i will drive it off a cliff Plenty of relatively stock cars trapping around 110 mph Mark with prob around 350hp , justins 112 does not = 500hp , i dont want to get into an argument over what a stock car will trap at !!!. You do not need 800 hp to run 10's lets get that straight right now and the reason they run crap times is that they dont launch properly for every 1/10 th sec you take off your 60 ft you will take more off the ET , a REASONABLE launch on a sup is about a 1.6 , when i ran the 10.8 the 60ft was around 2.2 secs and i didnt keep full throttle for the whole run and wasnt using gas and my car aint 800hp so do the maths and work it out , the terminal will allways show the HP the car is making what will allter ET even more is TORQUE. As for getting a kit from Aus are you determined to spend more money than you have to ??? you will not get a kit cheaper than the ones Vortex do , bottle warmers are available too . Dude:flame Dev Quote Link to comment Share on other sites More sharing options...
MONKEYmark Posted October 16, 2004 Share Posted October 16, 2004 Originally posted by dude Plenty of relatively stock cars trapping around 110 mph Mark with prob around 350hp , justins 112 does not = 500hp , i dont want to get into an argument over what a stock car will trap at !!!. You do not need 800 hp to run 10's lets get that straight right now and the reason they run crap times is that they dont launch properly for every 1/10 th sec you take off your 60 ft you will take more off the ET , a REASONABLE launch on a sup is about a 1.6 , when i ran the 10.8 the 60ft was around 2.2 secs and i didnt keep full throttle for the whole run and wasnt using gas and my car aint 800hp so do the maths and work it out , the terminal will allways show the HP the car is making what will allter ET even more is TORQUE. As for getting a kit from Aus are you determined to spend more money than you have to ??? you will not get a kit cheaper than the ones Vortex do , bottle warmers are available too . Dude:flame Dev john all i was trying to say is to say the 2 big power supras at pod leons 800+ and the red dj craig one 900hp. should be doing a lot better than they are. they have not been shy with money and development time spent on them. the red one is all stripped out with a fuel cell and nos and custom 1 off parts. i do know supras over here seem to do badly with traction. but it can be sorted just look to america 1.3 1.4 60 foots. also you dont need high terminal speeds to get a good time. look at dave h with the N/A t in the 9`s with a 135 trap speed. some cars on stock turbos seem to trap high like ians car with hybrids or jakes car. i dont know what mine power wise would be with 1.1bar i have never trapped more than 114mph and in stock form was about 104mph traps. just looking into a nos kit from AUS as he knows what i need and what dont need using it on all his cars. just thinking of more mods for future. just want to try a couple of things out to keep onto stock turbo record for a bit longer Quote Link to comment Share on other sites More sharing options...
MONKEYmark Posted October 16, 2004 Share Posted October 16, 2004 here is a webpage of a guy doing all stats for drag racing. send him your details and he will put up your info good to read if you into finding out where you lose or gain your time http://www.t72supra.com/Supra_ETs.htm shows you lots of different cars with different turbo set ups. Quote Link to comment Share on other sites More sharing options...
Steve Cargill Posted October 16, 2004 Share Posted October 16, 2004 Originally posted by dude the terminal will allways show the HP the car is making what will allter ET even more is TORQUE. The trap speed and RWHP are tightly related and largely unaffected by how good or bad the launch is. The formula (ULWeight*2.2) * ((TermSpeed/234)^3) can be used to work out the RWHP, or you could tinker to get the trap speed based on weight and power. Have a look at a table I did a while ago where I ran this formula against real times, with a few exceptions there it's pretty good. Note that these were mainly street cars on unprepared tarmac http://www.cargills.demon.co.uk/supra/SpeedTable.htm Quote Link to comment Share on other sites More sharing options...
Need4Speed Posted October 16, 2004 Share Posted October 16, 2004 I have a pair of 17" Stern 5 spoke split-rims in my barn if anyone's interested. I think they're 10J. They're in reasonable nick and I'm open to any offers. Quote Link to comment Share on other sites More sharing options...
Justin Posted October 16, 2004 Author Share Posted October 16, 2004 Any pictures John? Are the splits knackered? (not sealed and letting air out?) Quote Link to comment Share on other sites More sharing options...
Need4Speed Posted October 16, 2004 Share Posted October 16, 2004 Justin, the wheels are fine, but I scrapped the fronts so was left with these. They've got a pair of 275/35Z17 S01s on but they are knackered. Quote Link to comment Share on other sites More sharing options...
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