2008 Street Mod Discussion - Page 3

evobeatsti · Jan 21, 2008, 10:10 PM

nice nice, i am about to go wild, i will take pics when stuff gets in

Warrtalon · Jan 22, 2008, 01:23 AM

Nothing wild here - just basic mods to finish out the standard bolt-ons that I never got around to doing before.

If you go wild, you better beat me.

KevinD · Jan 22, 2008, 07:56 AM

Quote:

Originally Posted by EVOlutionary

DRIVETRAIN
.... The Exedy Twin is the gold standard clutch.

the exedy twin weighs as much as the stock clutch so there is no weight savings there. there are a bunch of lighter options if weight is the goal. the ralliart twin is lightweight, as well as the carbonetics carbon twin. even the ACT with the prolite flywheel is lighter.

evobeatsti · Jan 22, 2008, 04:52 PM

Quote:

Originally Posted by Warrtalon

Nothing wild here - just basic mods to finish out the standard bolt-ons that I never got around to doing before.

If you go wild, you better beat me.

lol hopefully i can get my driving up to par this year, are you going to come out for the utah prosolo?

are you going to drive out to cali twice in march? i would seriousely just find a garage to leave my car at and fly, that is a loong drive especially from colorado

Warrtalon · Jan 22, 2008, 09:33 PM

I'm not driving - I'm riding in the 3-car toter that I rode in to Topeka. The toter will stay there with the cars, and I'm flying back in between. I'll only be in CA for the two weekends of the events.

Yes, we're coming to the Wendover ProSolo for sure.

evobeatsti · Jan 23, 2008, 06:57 PM

ok, i was reading the rules from the 2008 book and want to clarify some things.

it mentions modifying fenders to make big wheels and tires fit, if i went with wider front fenders would that be allowed or not? i was thinking of garage hrs fenders but would this be a legal mod?

also it said that you could cut or remove engine undertrays but not add them, does this mean that the voltex front undertray diffuser thingy would be illegal?

also what are the allowences for the voltex rear diffuser? does it count as a wing and would they measure the whole surface area even though it is under the car? would it count as one of the 2 allowable airfoils?

hopefully someone can chime in?

EVOlutionary · Jan 23, 2008, 07:45 PM

My responses are in RED below.

Quote:

Originally Posted by evobeatsti

ok, i was reading the rules from the 2008 book and want to clarify some things.

it mentions modifying fenders to make big wheels and tires fit, if i went with wider front fenders would that be allowed or not? i was thinking of garage hrs fenders but would this be a legal mod?
Front fenders can be modified OR replaced. This allows for the HRS front fenders.

also it said that you could cut or remove engine undertrays but not add them, does this mean that the voltex front undertray diffuser thingy would be illegal?
My personal interpretation is that it would be allowed under the splitter rules. It is not in excess of the front splitter rules.

also what are the allowences for the voltex rear diffuser? does it count as a wing and would they measure the whole surface area even though it is under the car? would it count as one of the 2 allowable airfoils?
Tough call. It can not count as a wing, as wings can only be mounted to the rear decklid. If it counts as modifying the rear fascia, then it would be allowed, as rear fascia is open. In my opinion it would technically not be allowed because I think it would be hard to argue that it is "modifying the rear fascia" rather than "adding a rear diffuser". . .

As I said, tough call, because someone theoretically could build a replacement rear fascia that has a full rear diffuser/undertray built into it (all one piece of fiberglass). I think that would technically be allowed. . .

hopefully someone can chime in?

Anyone else care to comment on the rear diffuser idea??

EVOlutionary · Jan 23, 2008, 07:49 PM

Quote:

Originally Posted by KevinD

the exedy twin weighs as much as the stock clutch so there is no weight savings there. there are a bunch of lighter options if weight is the goal. the ralliart twin is lightweight, as well as the carbonetics carbon twin. even the ACT with the prolite flywheel is lighter.

I can see how me saying a lightweight clutch is a good way to lose weight, then saying in the next sentance the ETD is the most popular could be misleading.

I meant for them to be 2 separate points. Tilton would be the lightest probably, but the ETD is the most popular. The Exedy Compe-R is significantly lighter than the standard twin, but Exedy does not currently stock these in the US. Maybe if enough people ask them for it they will start to stock it. (NOTE: it is ALOT noisier than any other Exedy I've tried)

EVOlutionary · Jan 23, 2008, 08:15 PM

I will go over a couple things I thought about when walking and driving the courses. I will refer to the points I drew on the map rather than the actual official corner numbers.

We'll start with the East course, Airport Strip. At point #1, I just couldn't figure out the fast way here. I tried launching hard, braking, turning, getting back on it. I tried lauching with the front wheel cocked a little to try to snap around the pivot cone. I tried to roll out slow, turn, then get on it. Nothing felt right or natural here. This came to be a reoccuring feeling thoughout this whole course. I just couldn't get into a rhythm. Coming up to point #2 you wanted to get the car out to the right as early as possible and start turning it back in to the left to get set up early for the next section. It didn't feel like I did that. It felt like I drove up to the double cones, slowed way down, made a left turn, the got lined up for the next section. Then coming up to point #3 you could be carring a good bit of speed. You really had to slow down, check up, stay tight around that right hander and you would be set up better for the next section. If you went in to deep there at point #3 you would have to come way back over to the right to get set up for #4. The cone at point #4 was a kenny cone. You are trying to stay as far out to the right as possible and that cone just seems to be about 3 feet in to far to the left!! After coming around the cone at point #5 I was back on full throttle again all the way to the finish. I MAY have given a little confidence lift in the final section there to get the car to rotate and miss that last inside cone, but I don't really remember.

EVOlutionary · Jan 23, 2008, 08:48 PM

Now on the West course, The Blob, the car felt ALOT better. It did what I wanted it to and the whole course just felt like it flowed seamlessly from one feature to the next. You come through the start and into the first slalom. This slalom messed with ALOT of people throughout the week because the 3rd and 4th cones are both on the right! I saw so many people start to turn in around the 3rd cone and then remember that they didn't have to turn yet. There were alot of cones hit here because of the odd spacing it through off your natural rhythm. I didn't seem to have a problem through that section. By point #1 you need to have your car facing down the straight and deep into the throttle. There are a lot of sections in this course where you can carry some good speed and you need to keep that speed as long as possible before you hit the WHOA pedal. Section #2 is one of them. The slow way is to brake early and coast through that corner. The fast way is to brake as late as possible and trail brake deep into the corner. As you come out there is a real tight gate. Run the drivers door along the outside cone, drift out a little more to the left once you're past it, then tap the brakes and turn into the next long slalom. This was a big, fast slalom and you could have quite a bit of speed built up coming out of it, but you are heading downhill and off camber coming into the big right hander. The designer gave you alot of room to come into the big right hander, and the opening of the schute is pretty wide trying to draw you in deep. This is bad! If you are out in the circled area for section #3 you are screwed. For the real tight "twitch" in there you need to get your car lined up so the hole is as wide as possible. There is quite a bit of room on the back side to bring your car back over to the left, so I think the most important thing is what you do before you get to it. Coming up to point #4 was the most and scary part of either course! You floor it once you're out of the "twitch" and hold it until you think you're going to die, then hold it a little bit more before slowly easing on the brakes. You are going up hill, ON camber so there was a TON of grip. Plus you are carrying ALOT of speed through there, so cars with aero have even more grip. You crank the wheel to the right and use little steering and throttle inputs to line your car up, then just after you get past the red line you hit the brakes, crank the wheel harder to the right, start to accelerate as you straighten the wheel. Start to feed the wheel to the left, hit the brakes, crank it more to the left, accelerate, unwind the wheel and drag race to the finish.

That very last 180 turn to the left coming into the finish straight is a little tough because you are off camber and when you get on the gas the car wants to slide or push downhill, to the right. If you plan for this and get the car lined up for the finish a little earlier than you normally would you can be really fast here. . .
Anyway, that's how it felt to me, and that's how I remember it now - 4 months later. I know that my cars historically have been faster on courses with normal slaloms and sweepers. It does not do so well with slower offsets like in the East course. I don't know if that's all EVOs, just my driving style, or my particular car setup. . .

EVOlutionary

evobeatsti · Jan 23, 2008, 10:29 PM

i totally agree with you on everything you said, i didnt like the airstrip i couldnt get any flow but i loved the blob. good write ups

GTLocke13 · Jan 23, 2008, 10:44 PM

A couple of notes...

West course: If you thought about the starting slalom as two back-to-back chicago boxes it was easy. In-out... in-out. You had to get over to the left after the pinch point to really make the most of that fast sweeper. I didn't, mostly because I was still worrying about getting the car through the pinch after I was already past it. The hairpin after the sweeper I saw a TON of people screw up really badly. This was a classic case of looking ahead. I picked up the exit cone of the turn as I was starting my braking and watched it like a hawk all the way through the turn. I never had a problem there. Also, you had to stay tight on all the sweeperish stuff in the first half of the course or you were in the marbles.

Result: 0.2 out of trophies on my first day ever of any national level competition, and I lifted in the sweeper on all three runs.

East course: I didn't really have problems with the start, mostly because I was in a RWD, and had no choice but to grandma it around the bend. Everything up through where you labelled 2 was pretty straightforward. Coming out of the turnaround, I never carried enough speed. Done right, it was full throttle from the turnaround to 3. The fast people were slowing down a lot at 3, coming out tight to the outside, and letting the car slowly drift to the inside through the fast sweeper. Done right, the kenny cone wasn't an issue (I never did it right). After that it was, "how brass are your balls?" all the way to the end. And a shift to third somewhere in there.

Day 2: Horrible. End result: First out of the bottom half.

chrisw · Jan 24, 2008, 03:21 PM

Quote:

Originally Posted by EVOlutionary

My responses are in RED below.

Anyone else care to comment on the rear diffuser idea??

IMO, if the rear diffuser is included as part of a body kit, then it's perfectly legal. I am not sure about adding one under the modification of the rear fasca, but that is the most plausible interpretation that would allow us to use one.

For the front tray, it's legal to remove the stock under tray to mount a splitter.

My question is this: is it legal to replace the stock undertray to re-enforce the front bumper skin? The way I interpret the rules, I think that might be legal.

Or, can I replace the undertray with a metel one and use the new undertray as a mounting point for the splitter?

My stock undertray is beat, and I need a way to re-enforce the front bumper skin against conage or risk damaging the new larger oil cooler I have or worse, the intercooler.

evobeatsti · Jan 24, 2008, 03:33 PM

wheels/tires for sale
17x9.5 NTO3+M w/ 275/40 v710 fs Utah

High_PSI · Jan 24, 2008, 09:16 PM

Quote:

Originally Posted by EVOlutionary

I don't really understand what you're saying. There are no rules for engines in SM other than it has to be a Mitsubishi block.

I don't know if it's intentional, but the HP looks a little peaky for 400whp. When I saw the dyno graph I first thought it was a GT35 or similar size turbo . . .

Here is another SM competitor's dyno graph:

What turbo is that? Is that the Green?