Got a track related question? I'll try to answer.

[kavanagh]

Originally Posted by THEmailman

Thanks for the response, I sent you an email. I think I forgot to add, does having a tune with something like EcuTek (or similar) cost points or is that free?

tuning with ECUTek is a 0 point mod, and so therefore running E85 is a 0 point mod as well.

[AZP Installs]

Originally Posted by kavanagh

tuning with ECUTek is a 0 point mod, and so therefore running E85 is a 0 point mod as well.

Yup, you just take points for the header-back exhaust.

-Mike Paisan


Maintaining, Modifying and Educating TriState Enthusiasts since 2001.
Like us on Facebook! | E-mail: sales@azpinstalls.com | 725 Fairfield Ave | Kenilworth, NJ 07033 | 908.248.AZP1 (2971) |AIM: AZP Installs
"Race Tested, Enthusiast Approved!"

[ZionsWrath]

Im about to do an oil change should i switch to 5-30 or stickwith 0-20

[kavanagh]

Originally Posted by ZionsWrath

Im about to do an oil change should i switch to 5-30 or stickwith 0-20

From what I've read, thicker oils are only relevant to FI cars. And even then, I don't think anyone is running as high as 5w30. There's too many threads to keep up on, but you might search on bobistheoilguy.com for our platform.


Since I'm NA, I stay at 0-20, even though I'm in AZ where it's hot as Hades.

[kavanagh]

Originally Posted by AZP Installs

Yup, you just take points for the header-back exhaust.

-Mike Paisan


Maintaining, Modifying and Educating TriState Enthusiasts since 2001.
Like us on Facebook! | E-mail: sales@azpinstalls.com | 725 Fairfield Ave | Kenilworth, NJ 07033 | 908.248.AZP1 (2971) |AIM: AZP Installs
"Race Tested, Enthusiast Approved!"

From what I'm seeing in TTD with this platform, the air filter, and E85 are enough to put you over the Weight/HP ratio allowed (14.25 lbs: 1 HP)even with minimal weight reduction.
People are just doing the muffler delete to more easily hear the engine. Even without full exhaust, you'll have to tune down in order to stay legal.


The only reason I can see for a full exhaust, especially the header, may be in throttle response or to increase area under the curve.


So that's +2 on header and +1 on cat remove/replace - 3 points that might be used in suspension, tires or aero which I imagine will contribute to quicker times more-so than area under the curve.


But I'm just armchair mechanic-ing now....

[DarkSunrise]

If you've got an oil cooler, you may want to go with a 30 weight to make up for the pressure drop across the cooler. Or so I've read...

I recently bought a Perrin oil cooler and will be switching to a 30 weight when I install it.

This would only apply to air-oil coolers.

[kavanagh]

Originally Posted by DarkSunrise

If you've got an oil cooler, you may want to go with a 30 weight to make up for the pressure drop across the cooler. Or so I've read...

I recently bought a Perrin oil cooler and will be switching to a 30 weight when I install it.

This would only apply to air-oil coolers.

Is there any particular reason you chose air-oil intercooled oil cooler instead of coolant-oil lie on the Forester or STi?


I like the idea of keeping the system more 'closed' like in the coolant-oil type, but really want whichever will cool the most efficiently for high ambient temps in an NA car.

[DarkSunrise]

Originally Posted by kavanagh

Is there any particular reason you chose air-oil intercooled oil cooler instead of coolant-oil lie on the Forester or STi?


I like the idea of keeping the system more 'closed' like in the coolant-oil type, but really want whichever will cool the most efficiently for high ambient temps in an NA car.

A couple of reasons:

1) From what I've seen, air-oil coolers are more effective in keeping oil temps cool. Perrin claimed they were seeing the ECU pulling timing above 212 F. On NA setups, Perrin's oil cooler seems to keep peak oil temps between 220-240 on the track. The typical water-oil coolers (Cusco, Forester XT) seemed to be in the 240-250 range.

2) An air-oil cooler adds additional oil capacity, typically 0.5-1q extra.

3) I didn't want to introduce heat to the coolant, even relatively small amounts. With a water-oil cooler, cold coolant coming out of the radiator would be first used to cool the oil, then cool the engine block. Given we know what detonation does to the DI seals on this engine, I didn't want anything to warm up the coolant before it got to the block.

4) This reason is minor, but my license plate is center-mounted on the grill, similar to this:



With the Perrin oil cooler (especially the way it's mounted 1" off the floor), I can effectively block off air to the oil cooler for daily driving just by having a front license plate. This will also keep rocks/stones from hitting the cooler. When I go to the track, I can pull the license plate off to get air flowing.

[AZP Installs]

Originally Posted by kavanagh

From what I'm seeing in TTD with this platform, the air filter, and E85 are enough to put you over the Weight/HP ratio allowed (14.25 lbs: 1 HP)even with minimal weight reduction.
People are just doing the muffler delete to more easily hear the engine. Even without full exhaust, you'll have to tune down in order to stay legal.


The only reason I can see for a full exhaust, especially the header, may be in throttle response or to increase area under the curve.


So that's +2 on header and +1 on cat remove/replace - 3 points that might be used in suspension, tires or aero which I imagine will contribute to quicker times more-so than area under the curve.


But I'm just armchair mechanic-ing now....

I'm not sure how the power/weight ratio would get that low. Remember the weight is post race with driver in the car. You would need over 200whp to get there if my calcs are correct.

Mike

[kavanagh]

Originally Posted by AZP Installs

I'm not sure how the power/weight ratio would get that low. Remember the weight is post race with driver in the car. You would need over 200whp to get there if my calcs are correct.



Mike

Correct. To stay 'safe' for a possible after race Dyno, guys are tuning to about 189 to allow for Dyno variances and not get a Disqualification. With the points accrual for the season you can drop your two lowest scores, but you can't drop a DQ - it will be held against you no matter how many races you miss.

[AZP Installs]

Originally Posted by kavanagh

Correct. To stay 'safe' for a possible after race Dyno, guys are tuning to about 189 to allow for Dyno variances and not get a Disqualification. With the points accrual for the season you can drop your two lowest scores, but you can't drop a DQ - it will be held against you no matter how many races you miss.

How much do these guys weigh?

At 189whp they would need to have no fuel, no driver and they would still be way over.

My stock car dynos at 168whp and tips the scales at just over 2700 without me in it.

Mike

[kavanagh]

Originally Posted by AZP Installs

How much do these guys weigh?

At 189whp they would need to have no fuel, no driver and they would still be way over.

My stock car dynos at 168whp and tips the scales at just over 2700 without me in it.

Mike

One I'm thinking of in particular runs 2835 minimum race weight with driver.
Which means they can run up to 198.9 hp, so they tune down to 189 or so just in case a 9hp dyno variance kicks them over. They placed in the top 3 at the East Coast Nationals two weekends ago.


Edit: at your weight assuming you weigh 150 lbs, bringing minimum race weight to 2850, you could run bang on at 200 hp to the wheels. but you must never ever dyno even 1/10th hp over that.

[Stumpygt86]

I have a set of 16x7 STI rims and was wanting to know what would be the better option for regarding tyre width.
I am looking at running the Advan 050 R/Spec tyre and was either looking at 225/45 or 215/45.

Cheers

[Simon99]

So I'm new to tracking but I am interested in getting a data logging box of some sort. I've looked at VBox and AIM particularly, but I was wondering if any of you had suggestions for the noob that I am. I'd love something that could also support a camera (is GoPro an option?) and overlays in video export if that's possible. I don't mind ''used'' at all, since from what I've seen they all start at around 600$. I'm setting a budget of 750$ for everything, but the lower the better !