Don't mean to hijack but Jozer, what do you mean donkey kick torque at quarter throttle? On bolt ons and the tune+ IWG, the only gear I get donkey kick torque is first gear, everything else is okay... It needs 75-100 throttle for me on my setup to spool past 10-15psi. I'm only asking this because I haven't gone cyborg just yet because of funds.
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Cyborg Turbo Review
- Thread starter Joszer
- Start date
Thread Starter
#22
I guess what I meant to say was that the throttle curve was not linear on the stock turbo and adam's tune. At quarter throttle cruising around town, it was normal to see my boost bounce from -4 to -3 PSI jump up to +6 psi very abruptly. With this new turbo, since it takes more effort to spool, while cruising around town I can keep the boost under 0 psi effortlessly while on my prior turbo with Adams tune I had to really concentrate to do the same.
Thread Starter
#24
[MENTION=3033]JasonHaven[/MENTION]
Things are going great with the car. On an E30 tune the car is neck and neck with a 370z from a roll, so the speed is definitely there. I'm getting to the point where I want more though, but given the strict SMOG laws of California I am going to leave it as it is. I figure if I get any more power, I'll just be blowing the tires off in 1st and 2nd gear completely and that'll be completely useless on the track given the super skinny tires that we use. All in all I am happy with the car.
Things are going great with the car. On an E30 tune the car is neck and neck with a 370z from a roll, so the speed is definitely there. I'm getting to the point where I want more though, but given the strict SMOG laws of California I am going to leave it as it is. I figure if I get any more power, I'll just be blowing the tires off in 1st and 2nd gear completely and that'll be completely useless on the track given the super skinny tires that we use. All in all I am happy with the car.
Yes, but it's not so simple. Often times when we go wider we get taller by default. But a wider tire of the same diameter (and compound) may have less linear traction than it's taller brother.
For linear traction you want a greater front to back contact patch, or in other words, longer.
For lateral (side-to-side) you want greater width in your contact patch.
A taller tire with low air pressure can put a lot of rubber on the ground. To get a better picture of this imagine a rectangular shape of velcro. Let's make it 5 (w)x 7 (l). Actually, this can also be done with a piece of tape if you have that laying around... Continuing on... Drag this velco (or tape) across it's respective surface long ways. Now change it up so that it's 7x5 and drag it in the same exact direction as the you did before... What you'll find is that there's considerably more friction with the piece as a 5x7 vs 7x5. Now, this is the *nearly* the same idea on a car.... Imagine that a 205/45/17 is the 5x7 velcro or tape, and a 225/40/15 is the 7x5. All other things considered equal, the 205/45/17 will have more linear traction, while the 225/40/15 will have more lateral traction.
This is all because of the shape and direction in which the contact patch is traveling. So just going wider won't simply give you better traction at the strip... Two things play into slicks being so great; the compound and lower tire pressure. The lower tire pressure allows you to put a significantly longer contact patch down than street tires even though the tire isn't that much taller. This is the objective of lowering your tire pressure at the drag strips and why you see "dat wrinkle" in drag slicks. A wider tire with the same length (front to back) contact patch won't provide much more linear traction.
Also, I'm terrible at trying to get people to imagine things in their head.
TL;DR - Compound, tire pressure, and contact patch shape and size are help determine grip levels of a tire.
P.S. Sorry if this is erratic.
For linear traction you want a greater front to back contact patch, or in other words, longer.
For lateral (side-to-side) you want greater width in your contact patch.
A taller tire with low air pressure can put a lot of rubber on the ground. To get a better picture of this imagine a rectangular shape of velcro. Let's make it 5 (w)x 7 (l). Actually, this can also be done with a piece of tape if you have that laying around... Continuing on... Drag this velco (or tape) across it's respective surface long ways. Now change it up so that it's 7x5 and drag it in the same exact direction as the you did before... What you'll find is that there's considerably more friction with the piece as a 5x7 vs 7x5. Now, this is the *nearly* the same idea on a car.... Imagine that a 205/45/17 is the 5x7 velcro or tape, and a 225/40/15 is the 7x5. All other things considered equal, the 205/45/17 will have more linear traction, while the 225/40/15 will have more lateral traction.
This is all because of the shape and direction in which the contact patch is traveling. So just going wider won't simply give you better traction at the strip... Two things play into slicks being so great; the compound and lower tire pressure. The lower tire pressure allows you to put a significantly longer contact patch down than street tires even though the tire isn't that much taller. This is the objective of lowering your tire pressure at the drag strips and why you see "dat wrinkle" in drag slicks. A wider tire with the same length (front to back) contact patch won't provide much more linear traction.
Also, I'm terrible at trying to get people to imagine things in their head.
TL;DR - Compound, tire pressure, and contact patch shape and size are help determine grip levels of a tire.
P.S. Sorry if this is erratic.
Also, this doesn't mean people should ditch the idea of wider tires in favor of thinner/taller tires. As I said, things like compound and wider tires being naturally taller in our sizes will still present a difference. The issue I was pointing to is that is you go down to a 15x8 make sure the tire you get has a comparable or slightly bigger diameter. Aka, a 24" 225 would have better linear traction than a 22" 225 at a given psi.
![[drinking]](/images/smilies/icon_smile_drinking.gif "Drinking Pals [drinking]"){kind=icon}
So what is this gasket that I'll need to buy for the turbo upgrade? Anyone know where to get it?
Also I jumped the gun and went to the Nurburgring yesterday...it was absolutely incredible. We got caution flagged on our second lap because a BMW went off the course ahead of us but we still squeezed out a 10:22 my first time ever on a track. So I have no doubt after the cyborg and the tune I'll be in the 9s
Also I jumped the gun and went to the Nurburgring yesterday...it was absolutely incredible. We got caution flagged on our second lap because a BMW went off the course ahead of us but we still squeezed out a 10:22 my first time ever on a track. So I have no doubt after the cyborg and the tune I'll be in the 9s
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