Imports

[TheCracker]

I dont get why people do stuff like that like drill holes in their rear bumper. As far as I know they do it to increase downforce and stability at the rear or reduce drag.... Wouldnt a rear diffuser fix all those problems and look 100 times better?

Better rear axle cooling?

 

[Rue]

Honda Integra Type-R by R-W-P (Rupert in HK), on Flickr

 

[CodeRedR51]

I dont get why people do stuff like that like drill holes in their rear bumper. As far as I know they do it to increase downforce and stability at the rear or reduce drag.... Wouldnt a rear diffuser fix all those problems and look 100 times better?

Depends on the car. I know people with track Miata's do it because the rear bumper in stock form acts like an air scoop.

 

[Glubags]

My new daily driver/ongoing project:

It's a legit GT-S coupe, not an SR5 conversion. 1986. LSD rear, excellent body, no rust, and the rebuilt black-top 4A-GE in this one runs stronger than the '89 red-top that was in my MR2. 👍

 

[CodeRedR51]

Nice! 👍

This the "tired of waiting for my S2000 to be finished so I need another project" project?

 

[Glubags]

Haha, yeah, that's pretty much what the MR2 was. Last week, an old man in a pickup pulled out across the road from a side street directly in front of me, saw me, panicked, and instead of accelerating out of the way he just braked and blocked my lane like a deer in headlights. There was a slightly-less-than-AW11-sized gap between the curb on the right and his rear bumper, and I did well not to just straight up t-bone him. Unfortunately his rear bumper/corner of his bed scraped across the top corner of my front drivers side, and his insurance company totaled the car on cosmetic damage alone.

I didn't want to deal with a salvage title on a car I'd already spent a good deal of money on, so I cut my losses and removed all the aftermarket/new parts and plan to post a FS thread for those (along with a lot of new exterior parts I'd been gathering for whenever I could afford quality paint and body work) on club4ag soon. Found the GT-S about 70 miles north of me, drove it home in the rain Tuesday, already in love with it.

 

[CodeRedR51]

Switching the wheels over to the 86?

 

[Glubags]

Unfortunately I can't, so I'll be selling them as well as soon as I can get a replacement center cap for that front driver side wheel. The SR5s run 4x100 hubs like the MR2, but the GT-S hubs are 4x114.3. The Celica Supra wheels will suffice for now; definitely weighing my options as new wheels go.

 

[Perfect Balance]

I dont get why people do stuff like that like drill holes in their rear bumper. As far as I know they do it to increase downforce and stability at the rear or reduce drag.... Wouldnt a rear diffuser fix all those problems and look 100 times better?

This is the same car at a later time:

Also iirc it had a rear mounted radiator, hence the ducts in the side and in the rear, right below the tail lights.
I think it was was weight savings though, they basically removed the car behind the suspension and replaced it with a few bars to hold the body together. The cage is tied into the rear suspension mounts so everything behind it was kind of pointless are far as chassis rigidity goes.

Depends on the car. I know people with track Miata's do it because the rear bumper in stock form acts like an air scoop.

I'm going to go out on a limb here and say that this was simply a misconception likely started by some grassroots level racer and everyone followed suite. Being there are no holes in the factory bumper, it's not going to act like an air scoop, but rather simply make a pocket of air inside the bumper while the airflow went right under it. By making the holes in it, the bumper then acts like a chute, but probably disrupts airflow and causes turbulence(with enough holes it probably doesn't create any kind of noticeable drag, but is unnecessary). This is why parachutes have holes in the top of them, and aren't simply an enclosed bubble.

For the same reason pickup trucks get better gas mileage with the tailgate shut, as opposed to popular belief.

Either that or it began from drag racers doing it for the same reason, but if I had to guess I'd say it was to provide the parachutes with more air so they open quicker.

 

[Keef]

Depends on the car. I know people with track Miata's do it because the rear bumper in stock form acts like an air scoop.

Alex already covered the bumper part, but I want to relate it to another part of car design. A lot of people think that depressions in the fascia of the car act like parachutes, things like fog light depressions, or headlights like the Challenger and Camaro, or those fake air intake that are depressed into the dumper and inch or two. But they don't act like parachutes. They don't really act like anything actually. At speed they become full of static air while the wind simply flows around them. They add little to no drag and certainly don't capture air like a parachute. Parachutes work by slowing the airflow greatly, thus creating a very high pressure zone inside the chute which effectively pulls the car backward. If there is no escape hole for this air it will simply sit stagnant while the wind flows around it.

 

[Perfect Balance]

Yeah basically. I don't know dem der fancy words an' all. Like "stagnant".

 

[CodeRedR51]

Simply brilliant. Not much else to say really.

Edit:

 

[ShobThaBob]

That's one way to get a skyline legal in the US.

 

[nobuffalo]

My new daily driver/ongoing project:

Unfortunately I can't, so I'll be selling them as well as soon as I can get a replacement center cap for that front driver side wheel. The SR5s run 4x100 hubs like the MR2, but the GT-S hubs are 4x114.3. The Celica Supra wheels will suffice for now; definitely weighing my options as new wheels go.

The SR5s are 4x114.3 as well.

Awesome Corolla! I had a '85 GT-S hatch but it had a few nasty rust spots so I got rid of it. My brother currently has a '85 GT-S hatch and my cousin has a '85 SR5, '86 GT-S hatch and a '87 GT-S coupe Between the 3 of us we have quite a bit of experience with the 86s. The cars are great to drive.

 

[tfujiwara]

I hate to ask, but do you guys happen to have some awesome shots of a crowd almost getting run over by a WRC car?

 

[RocZX]

 

[Perfect Balance]

This is my buddies car from Maryland. He actually liked 240s for a while, and after talking with me I convinced him to find and buy one. Since then he has done probably around 10 drift events in the span of two years, and he usually podiums when they have competitions at the local tracks. Dude is really good, went from knowing nothing of drifting to being able to link just about every course at Summit Point.

 

[speed junkie]

That's one way to get a skyline legal in the US.

Seems like you think that LSx is in the Skyline above it. It's actually a Miata.

I hate to ask, but do you guys happen to have some awesome shots of a crowd almost getting run over by a WRC car?

You must not been following this thread much.

 

[Glubags]

The SR5s are 4x114.3 as well.

Good to know! And yes, this car felt just as good as my old first-gen RX-7. So well-balanced and predictable. Driving it home in the rain was a blast.

 

[Cano]

Epicness. More info, pics or whatever?

Also, awesome Integra pic, Rue!

 

[Cale]

 

[motortrend]

^Wow, that looks really nice except for those LEDs, that red (i think) ragtop looks delicious. Wish I could fit comfortably in a miata.

 

[Slick Rick]

That MX5 is gorgeous! Best ive seen of that shape, makes me want to consider one for my next car if I can get it to look like that 👍

 

[Glubags]

MX5 is awesome save for the eyelids. I'm convinced RPF1s look good on everything.

 

[Slick Rick]

I think the eyelids are a nice touch, it adds to the look. Id just lose the led strips too and those black side markers....

 

[Keef]

MX5 is awesome save for the eyelids. I'm convinced RPF1s look good on everything.

For reals. Such a simple, purposeful look, and then knowing that they're some of the lightest and least expensive performance wheels around makes them that much better.

 

[RocZX]

Epicness. More info, pics or whatever?

Here some more info, 1998 JTCC SYMS GF8 Subaru Impreza Wagon

Edit :

 

[Rue]

 

[Cano]

Here some more info, 1998 JTCC SYMS GF8 Subaru Impreza Wagon

Thanks, tough it's a bit sad to know it was never competitive. Still, awesome car.

 

[Christian_C]

My new daily driver/ongoing project:

That's a gorgeous looking 86 👍

You have a pm by the way