firemanfrank

Since C&D makes adjustments for weather conditions and does opposite direction runs to cancel out the effects of wind ...

What is going on with the diff in Top Speed between the sedan and coupe?

2008 TC Coupe:
http://www.caranddriver.com/reviews/...cs+page-2.html
2009 TC Sedan:
http://www.caranddriver.com/reviews/...cs+page-2.html

The coupe has the Hi-Pro spoiler, and the sedan only comes with the Lo-Rise type.

But the Hi-Pro certainly can't be robbing a full 10mph off Top Speed. What gives?

glen229

iTrader: (4)

thats wierd... sedan ftw

BigTizzle903

sedan ftmfw

DebadgedBALT77

At those speeds, Im sure the high pro wing is taking off alot more speed then one would imagine. 10mph though? i dunno

leahciM

It's possible... I remember seeing my high-rise vibrating pretty damn good when I was going really fast on a closed course....

DebadgedBALT77

yea, ive followed behind some SC's with the high rise, and at ertain speeds they start flexing alllll over the place.

firemanfrank

Is there some way of contacting C&D about this?

10mph is a big difference.

DebadgedBALT77

i really dont think its worth the effort man^. its not that big of a deal.

recklessactn

iTrader: (1)

I went 158 mph in my ss/sc with just an injen intake and I had the high rise spoiler. There numbers must be hypothetical not actual

Xenozx

well ya, maybe his speedo was off, but I hit 155 in 5th, and the fuel cut off. Like I got to like 146 in 4th, and switched to 5th, and made it up to 155 before I hit the fuel cutoff.

Ive hit 155 so many times lol, not any time recently tho, but ya I hade teh high rise, and Im sure I did it when I was slightly modded. I dont see any reason why the T/C coupe couldnt hit its max, since it is more powerful then my car was when I had just an intake.

ralliartist

I've buried the speedo in 4th with the stock high rise, and done it again wingless.

firemanfrank

I'm thinking that a 10mph diff in Top Speed on virtually the same car would be a big deal to the people who actually test the cars.

Was just wondering what their response would be ...

MapOfTaziFoSho

It's the spoiler.

Psykostevo

Typo.......that's my guess.

Immortal Technique

These cars are drag limited. there is no fuel cut or speed limiter

06blackg85ss

iTrader: (1)

158 mph is the limiter on the ss/sc, I would assume it would be the same on the tc.

Area47

155 for the ss/t cars

redninja6r

I read 160+ for ss/tc somewhere, I think it was Motor Trend? Maybe not, but i thought so.

N8s07SS

Are you sure? I swear I've read that exact fact somewhere. That thing has a LOT of surface area.

Terminator2

Road and track and GM both state 160mph, but I believe that the high rise may cut up to 10mph off of that mine flexes like crazy at speeds over 90mph. I dont know about the top speed of my t/c though because I have never had it above 115mph.

Area47

HP tuners clearly reads 155 mph for speed limiter one AND two.

id rather believe the information out of the car itself than someone writing an article.

1WhiteSSTC

has someone bothered to e-mail them and ask?

Area47

proof


the wing is a large drag item on the ss/t cars

Terminator2

/Thread. GM is spreding misinformation apparently.

Psykostevo

There is a fuel cut speed limiter.

It for sure creates downforce at high speeds.