[Vince@ V K Motorwerks]

My personal goal is to have my car trap at 120 or above in the 1/4 mile. This seem to be where most of the top end sports cars are stock. Wanted to know what you guys think, is it possiable for our cars to trap 120mph with a tune, exhaust, dp's, CAI? if not then what do you guys think it will take to trap at that speed? Tuners responses would be welcomed.

[Kerosene Hat]

Not a racing expert, but I would think you'd def need DRs as a minimum in order to hook up if you were to have a shot. Gotta get the power to the ground.

[michsu]

I think I read that we are only trapping 112-115.. something like that...

http://www.e90post.com/forums/showthread.php?t=111689

[Vince@ V K Motorwerks]

Vishnu's website says he trapped at 116.8mph, so I would need like 3.2mph more to achive my goal.

[e90AW335i]

I would think you would need a tune that held ~15psi to redline, good IC, CAI, Catless DPs, LSD would help, and maybe some more things that are slipping my mind.

It would be very hard....

[Bimmer335i07]

2 words.

Turbo Ugrade!

[Lane]

Originally Posted by Bimmer335i07

2 words.

Turbo Ugrade!

+1

[radgator1]

Originally Posted by Bimmer335i07

2 words.

Turbo Ugrade!

One word, Nitrous.


Either that or gut your car of about 500 lbs to the point where it sucks as a daily driver. Short of that there is no way you are going to trap 120 in this 3600 lb car since you will need 500 whp or close to it

[Chowbow]

DRs or slicks won't help much in trap speed anyway, it's about brute power (or power to weight ratio). I'm sure someone will get there on a daily driver but not right now.

[Spool]

I highly doubt you can trap that with just the mods you mention. it takes a lot of power to haul a 3600 lbs cars across the 1/4 at 120mph.


Might have to upgrade your turbos as someone mentioned and or nitrous

[Vince@ V K Motorwerks]

So you guys are telling me that to get to 120 which is 3.2 mph faster then what shiv did in his car, you will need a turbo upgrade or nitrious or shave off 500lbs? are you serious? Shiv can you chime in?

[!Xoible]

my goal is to trap 0-60 at 120 mph

sorry... thought it's funny to say

[Vince@ V K Motorwerks]

How is a Skyline GTR that weighs 3800lbs with 480bhp able to do the 1/4 at a trap speed of 122? If your making 400whp wouldnt that be like 460bhp if you have a 15% drivetrain loss? and not to mention the 335i is 200lbs lighter...so can someone explain, Im just confused and really want to try to make sense of all this.

[michsu]

with all your (mine are similar) additions, I'm guessing we get no more than

STOCK : 312 hp (260 rwhp) / 336 tq (280 rwtq)

Procede + Vishnu Stage 1 (this example will be for me) :
+102 hp / +110.4 tq (+85 rwhp / +92 rwtq)

plus the downpipes and air intake (maybe 20 rwhp / rwtq total here?)

FINAL : 437 hp (349.6 rwhp) / 469.4 tq (375.5 rwtq)

something along those lines.. our cars are about 200 more pounds than the 996TTs X50s.. I know it's probably not done this way, but that's about 6%-7% more weight that we have.. so you would probably need +6%-7% (more probably like +10% hp).. and probably "how we make our power" is different also.. so you probably have to account for that..

437 + 10% ==> 480+ (so around 500 , you round up )

[Spool]

Originally Posted by Chitown335i

So you guys are telling me that to get to 120 which is 3.2 mph faster then what shiv did in his car, you will need a turbo upgrade or nitrious or shave off 500lbs? are you serious? Shiv can you chime in?

Shiv was pushing 400RWHP and 450torque to trap that, you'd need something like 70more rwhp with the current weight to trap 120

[radgator1]

Originally Posted by Chitown335i

How is a Skyline GTR that weighs 3800lbs with 480bhp able to do the 1/4 at a trap speed of 122? If your making 400whp wouldnt that be like 460bhp if you have a 15% drivetrain loss? and not to mention the 335i is 200lbs lighter...so can someone explain, Im just confused and really want to try to make sense of all this.

Okay, here is another way of looking at it, the fastest trap by a long shot in this car is Shiv's run and he happens to be a tuner. If you take out the runs buy Tuners such as Vishnu, VIP and BMS (Terry) the fastest anyone has trapped is 113. You want to know if by doing all the bolt ons can you run a 7 MPH faster trap than that and the answer is no.

Rather than saying "Shiv ran 116.8 so all I've got to do is add a mere 3.2 MPH to that trap" you should start by looking at what the best trap YOU have run so far, and work on improving that. But again if you are set on running 120 I would look at spraying because it will be a helluva lot cheaper than a turbo upgrade.

[radgator1]

Originally Posted by Spool

Shiv was pushing 400RWHP and 450torque to trap that, you'd need something like 70more rwhp with the current weight to trap 120

Thats making the assumption that he can trap as fast as Shivs car did that day as a given, so by adding 70 more whp he will be at 120.

Again, rather than using Shivs (and anyones for that matter) very best time as a starting point to improve on, use your own best as a starting point.

[michsu]

you can also try to get some higher octane.. I think there is lower rewards higher than 94 octane.. but you can maybe try 100 if you want.. it should add +10-15 hp over the calculations above.. so with that you can probably be even with the 996TTs... that way you can see what the MAX you can get right now without all the mods..

so you can see that's why the Skyline GTR can do the 120+, while we can't (well, not yet)...

480 + 10-15 (higher octane) ==> 490-495 (anyway, it's about 500)

[Spool]

Originally Posted by radgator1

Thats making the assumption that he can trap as fast as Shivs car did that day as a given, so by adding 70 more whp he will be at 120.

Again, rather than using Shivs (and anyones for that matter) very best time as a starting point to improve on, use your own best as a starting point.

Yes i stated that based on the assumption that he could trap 116 with 400 to the wheels. Im just estimating but it would take another 70 so HP more to trap 120 given the same condition that he trapped 116 with.


so it's something like you need 475rwhp to haul this car+yourself across the 1/4 mile at 120mph

[ArmyBimmerDude]

Originally Posted by Chitown335i

How is a Skyline GTR that weighs 3800lbs with 480bhp able to do the 1/4 at a trap speed of 122? If your making 400whp wouldnt that be like 460bhp if you have a 15% drivetrain loss? and not to mention the 335i is 200lbs lighter...so can someone explain, Im just confused and really want to try to make sense of all this.

Dude the GTR's power has already been proven to be WAY underrated. Plus its AWD. Choose another car to compare.

Can you say "bigger turbos"?

[michsu]

you guys can do an example for him seems he probably won't understand something like "+70 hp will result in 120".. maybe some concrete numbers will help..

[Full Function]

Power is not the only limiting factor, you will have to also consider gearing as well. Traction should not be an issue with decent tires, you may not need drag radials. I think the best thing you can do is go to the track and practice launching the car and shifting... I hope this helps.

Jerry