My 85 wont break 130mph
Pro
Joined: Jun 2003
Posts: 559
Likes: 6
From: OKC OK
Re: My 85 wont break 130mph (montie98)
The published top speed of the '85 was 150 mph. At 130 mph it looks like you're suffering roughly 1 mph loss per year. Buy a book and some wrenches and turn that around! :seeya
Instructor
Joined: Apr 2003
Posts: 224
Likes: 0
From: lexington ky
Re: My 85 wont break 130mph (montie98)
Per G.M. your 85 should top out between 150 & 152 M.P.H. I purchased a new 85 in late 85 just before 86 was released. Collected data back then stated above top speed. My top speed during 2 years of ownership 138 M.P.H. & STILL PULLING FAIRLY STRONG!
Team Owner
Joined: May 2002
Posts: 24,337
Likes: 25
From: San Diego , CA Double Yellow DirtBags 1985..Z51..6-speed
Re: My 85 wont break 130mph (007rollie)
I've seen specs anywhere between 147 and 154 mph. I haven't maxed mine out yet though.
Check the easy stuff.... is the floormat in the way? Are the brakes or parking brake dragging?
I'll have to do the calcs and see how much horsepower it takes to push a vette at 150.... then we can figure out how much down on power you are.
Check the easy stuff.... is the floormat in the way? Are the brakes or parking brake dragging?
I'll have to do the calcs and see how much horsepower it takes to push a vette at 150.... then we can figure out how much down on power you are.
Team Owner
Joined: Mar 2000
Posts: 83,383
Likes: 87
From: Boston, MA
Re: My 85 wont break 130mph (lead foot 85 vet)
At what RPM are you seeing 130? Will it just not pull anymore RPM or is the fuel actually shutting off like the ECM has been reprogrammed to enable the speed limiter?
Auto or stick?
Auto or stick?
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Pro
Joined: Oct 2001
Posts: 682
Likes: 23
From: loxahatchee fla
Re: My 85 wont break 130mph (scorp508)
while my 1985 corvette is nowhare close to stock , now, in fact (theres not a single part that came from chevy in the engine) when it was it could hit the mid 140s with ease but youll need about a two mile stretch of strait road with no cross streets, no traffic, a dry calm day, Z rated tires, and be slightly nuts like (someone thats taking the 5TH) to prove it! (youll hit 145mph at about the 1-1.25 mile, mark, then youll need to start slowing down, (don,t slam on the brakes)
Safety Car
Joined: Sep 2000
Posts: 3,524
Likes: 4
From: Hinckley Ohio
Re: My 85 wont break 130mph (scorp508)
I am looking at Car and Driver Magazine, January 1996 issue, page125, Road Test of 1996 Corvette Grand Sport.
Top Speed Data:
4th gear 135mph @ 6300 rpm
5th gear 168mph @ 5800 rpm (drag limited)
6th gear 140mph @3200 rpm
So tell us more about your car and how you tested it!!
Top Speed Data:
4th gear 135mph @ 6300 rpm
5th gear 168mph @ 5800 rpm (drag limited)
6th gear 140mph @3200 rpm
So tell us more about your car and how you tested it!!
Le Mans Master
Joined: Aug 2000
Posts: 6,227
Likes: 0
From: Corona CA
Re: My 85 wont break 130mph (scorp508)
Auto or stick?
My early 86 auto, 2.59 gears, was at 135, still pulling and plenty of gas pedal left before my courage gave out...