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Hi guys,
Even though my car is PTG superchargerd with 670whp with seats and spare wheel removed and running M/T 315/35 Slicks with 10 psi i STILL Couldnt MANAGE to touch 11s in 1/4 mile....i know my 60 ft is bad but i cant get it to dip below 2s and Ran a flat 12 with trap speed of 195kph...Here we don't have a dedicated drag strip, they use a runway to organise drag events... So it's basically a normal strip of tarmac finding traction is very hard...could only manage 2 runs before it started raining, should I try launch control with the slicks ? Any tips will be appricaiated, thanks...
315/35/17
Could only manage 2 runs and it started raining
Last edited by eashwar63; Apr 19, 2025 at 05:05 AM.
Hi guys,
Even though my car is PTG superchargerd with 670whp with seats and spare wheel removed and running M/T 315/35 Slicks with 10 psi i STILL Couldnt MANAGE to touch 11s in 1/4 mile....i know my 60 ft is bad but i cant get it to dip below 2s and Ran a flat 12 with trap speed of 195kph...Here we don't have a dedicated drag strip, they use a runway to organise drag events... So it's basically a normal strip of tarmac finding traction is very hard...could only manage 2 runs before it started raining, should I try launch control with the slicks ? Any tips will be appricaiated, thanks...
315/35/17
Could only manage 2 runs and it started raining
Two thoughts:
1. Your car isn’t making 670 WHP. 195 KPH is 121 MPH which is a trap speed I’d expect to see on a car making 100+ HP less.
2. Your 60’ is worse than you think lol. Cutting that to even a moderate 1.8 would put your car 11.4-11.5 in the 1/4 which is much more like it. I’m not sure why you’ve got the drag radials aired down so much… I run my ET Street R at 18-20 PSI and my car makes 1059 WHP FYI… 10 psi is too low.
It's that 60' for sure. Like
mentioned above knocking .4 seconds off that shouldn't be hard either the car/setup. Tires and geometry play a huge factor. Also a runway is hard rk
kaunch not near as much grip as a prepped drag strip or even the street in most cases
For one you made your tire height too tall. It’s higher then stock 18s. If you look at the guys running 10s or better they are running much narrower drag tires. Also on smaller rims but with the stock brakes it’s hard to go much smaller. Mt at 315 are also very heavy Hoosiers typically do better from what iv seen on our cars both weight and 60 foot. Your 60 foot is a big factor as well like other have said. Then the next factor is with your mods your trap should be much higher so something mechanically is wrong. All three of these are contributing factors.
1. Your car isn’t making 670 WHP. 195 KPH is 121 MPH which is a trap speed I’d expect to see on a car making 100+ HP less.
2. Your 60’ is worse than you think lol. Cutting that to even a moderate 1.8 would put your car 11.4-11.5 in the 1/4 which is much more like it. I’m not sure why you’ve got the drag radials aired down so much… I run my ET Street R at 18-20 PSI and my car makes 1059 WHP FYI… 10 psi is too low.
Thats what it showed on the Dyno....Have to work on my 60ft timing and try launch control but scared for my shaft LOL 😆
For one you made your tire height too tall. It’s higher then stock 18s. If you look at the guys running 10s or better they are running much narrower drag tires. Also on smaller rims but with the stock brakes it’s hard to go much smaller. Mt at 315 are also very heavy Hoosiers typically do better from what iv seen on our cars both weight and 60 foot. Your 60 foot is a big factor as well like other have said. Then the next factor is with your mods your trap should be much higher so something mechanically is wrong. All three of these are contributing factors.
We did check everything mechanically and found nothing wrong, Have to work on 60ft timing but finding it very hard to grip....
9147213]For one you made your tire height too tall. It’s higher then stock 18s. If you look at the guys running 10s or better they are running much narrower drag tires. Also on smaller rims but with the stock brakes it’s hard to go much smaller. Mt at 315 are also very heavy Hoosiers typically do better from what iv seen on our cars both weight and 60 foot. Your 60 foot is a big factor as well like other have said. Then the next factor is with your mods your trap should be much higher so something mechanically is wrong. All three of these are contributing factors.
Tire height is not causing his issues. With a PD blower, running a taller rear tire is advised to help blunt the torque hit off the line.
Originally Posted by eashwar63
Thats what it showed on the Dyno....Have to work on my 60ft timing and try launch control but scared for my shaft LOL 😆
I’m saying you should definitely datalog the car as suggested above because you’re not making 670 WHP with that trap speed. Either something is off or you have a very happy dyno lol…. If you’re still on pump gas you could be seeing knock retard for sure. In regard to the drag “strip” you’re running at, do they let you do a burnout to clean off the tires? 10 psi is too low. How long are you doing the burnout for?
Last edited by Joshinator99; Apr 19, 2025 at 10:16 PM.
You may have made 670whp on the dyno on that day but you were making around 500whp or less at your track event. Are you sure the secondary belt is still on? You should be around 140mph/225kmh trap speed regardless of how poor the 60ft is. If you cant at least trap that no point in chasing on how to get the car off the line. Once you figure out why your car is now naturally aspirated then you can worry about launching. That's easily a high 9 second car on pump gas if you get it working properly. Check your rear subframe bushings make sure they aren't blown out as well as the rear shocks. If the car is lowered you're hurting the geometry not helping. I just drove a PTG 4L car today and it's an absolute animal. Putting the power down will be tough but you weren't even making it. This one was struggling for grip even after shifting into 4th gear. Hoping to hook up on a poorly prepped surface will never happen. Go somewhere else if it's that bad.
You may have made 670whp on the dyno on that day but you were making around 500whp or less at your track event. Are you sure the secondary belt is still on? You should be around 140mph/225kmh trap speed regardless of how poor the 60ft is. If you cant at least trap that no point in chasing on how to get the car off the line. Once you figure out why your car is now naturally aspirated then you can worry about launching. That's easily a high 9 second car on pump gas if you get it working properly. Check your rear subframe bushings make sure they aren't blown out as well as the rear shocks. If the car is lowered you're hurting the geometry not helping. I just drove a PTG 4L car today and it's an absolute animal. Putting the power down will be tough but you weren't even making it. This one was struggling for grip even after shifting into 4th gear. Hoping to hook up on a poorly prepped surface will never happen. Go somewhere else if it's that bad.
Did 11.7 just now with 200KPH trap speed...Yeah we have bad fuel in the country,the best we get is not even close to your pump gas 😅.....Anyways i did log the runs should be able to figure out what's wrong.... Thanks for your info 👍
there is something wrong with your car you should be trapping over 130+mph even with a bad 60ft I would check you plugs and send a data log to your tuner.
A high compression engine with boost on top with poor fuel is a recipe for failure. Either get some dedicated fuel to mix in or rebuild the engine with much lower compression pistons those are the two choices. Atleast meth injection or something to supplement low octane. We get 93 octane in texas, and it's arguably just as good as most places 91 octane fuel.
I'm losing power because of my fuel filter and pump, right after the runs i got error codes related to fuel....
can someone tell me what exactly these errors codes are ?
Last edited by eashwar63; Apr 22, 2025 at 12:22 AM.
You may have made 670whp on the dyno on that day but you were making around 500whp or less at your track event. Are you sure the secondary belt is still on? You should be around 140mph/225kmh trap speed regardless of how poor the 60ft is. If you cant at least trap that no point in chasing on how to get the car off the line. Once you figure out why your car is now naturally aspirated then you can worry about launching. That's easily a high 9 second car on pump gas if you get it working properly. Check your rear subframe bushings make sure they aren't blown out as well as the rear shocks. If the car is lowered you're hurting the geometry not helping. I just drove a PTG 4L car today and it's an absolute animal. Putting the power down will be tough but you weren't even making it. This one was struggling for grip even after shifting into 4th gear. Hoping to hook up on a poorly prepped surface will never happen. Go somewhere else if it's that bad.
Yup no signs of belt slip and i think I was not making power bcz of bad fuel pump or clogged fuel filter....my car did 396 whp before S/C and 670whp after on the same dyno...I do have bilstein coilovers on the car and i have increased the rear ride height to fit the tall slicks....Will tackle the problems 1 by 1 starting with the fuel system...thanks for the info 👍
I'm losing power because of my fuel filter and pump, right after the runs i got error codes related to fuel....
can someone tell me what exactly these errors codes are ?
the idle rich stop code is for fuel injector mapping needs adjustment. The fuel pressure code you need to look at the freeze frame data to get more info.
as others have stated, you are not making 670whp. dyno mode disables a given number of safety measures thus will report higher power than actual if in fact you are breaching safety limits.
your screenshot shows that your tune is not correct for fueling and the ECU is unable to compensate for being too rich. the factory computer will stop around 32-35% fueling correction and throw codes. if your fueling is this far off, you are lucky your engine hasn't blown yet especially with boost. seems that you also have low fuel pressure which is likely why your ECU is maxing out your injectors to keep your engine from melting down.
have you not reached out to your tuner to aid you? nobody here has tuned your car so we aren't able to diagnose why it is running the way it is without proper diagnostic or logging tools. also, most tuners are "shelf tuners" so you get what they can copy and paste so likely you'll receive limited help aside from them telling you to spend money on this or that and replace this or that.
a PTG supercharger should run 10.8-10.9 et at the slowest as a rough ballpark.
Last edited by eightysixtuned; May 2, 2025 at 05:55 AM.
as others have stated, you are not making 670whp. dyno mode disables a given number of safety measures thus will report higher power than actual if in fact you are breaching safety limits.
your screenshot shows that your tune is not correct for fueling and the ECU is unable to compensate for being too rich. the factory computer will stop around 32-35% fueling correction and throw codes. if your fueling is this far off, you are lucky your engine hasn't blown yet especially with boost. seems that you also have low fuel pressure which is likely why your ECU is maxing out your injectors to keep your engine from melting down.
have you not reached out to your tuner to aid you? nobody here has tuned your car so we aren't able to diagnose why it is running the way it is without proper diagnostic or logging tools. also, most tuners are "shelf tuners" so you get what they can copy and paste so likely you'll receive limited help aside from them telling you to spend money on this or that and replace this or that.
a PTG supercharger should run 10.8-10.9 et at the slowest as a rough ballpark.
your 100% true, Since installing the SC kit my car has rough idle(rpm fluctuating in idle) and there is no vacuum leak what so ever can confirm after checking for hours for a leak...I have sent logs and asked for a revision but haven't received any replies.....Got error codes related to fuel filter and regulator,so will change that and find a new tuner....Like you said it's just a copy paste tune file which is not working for low quality fuel in my country and it's drinking up a lot of fuel and I have been complaining about it aswell but no response😔
your 100% true, Since installing the SC kit my car has rough idle(rpm fluctuating in idle) and there is no vacuum leak what so ever can confirm after checking for hours for a leak...I have sent logs and asked for a revision but haven't received any replies.....Got error codes related to fuel filter and regulator,so will change that and find a new tuner....Like you said it's just a copy paste tune file which is not working for low quality fuel in my country and it's drinking up a lot of fuel and I have been complaining about it a swell but no response😔
Sounds like it's time to find a new tuner and stop risking your very expensive engine with amateurs.
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