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HP and T-Tops

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Old Apr 3, 2002 | 09:13 PM
  #1  
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Car: 91 Firebird Formula
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HP and T-Tops

Ok..I got somewhat of a dumb question to ask......
Ive been told that you CAN'T go crazy building up a motor if you car has T-tops. Is this true?? I understand the fact that having T-Tops is a weaker construction than a hard top. I was told from another person that IF you do build the motor up you can add addittional support to the chassis to make it stronger. Can someone please tell whats truth and whats ???

Thanks in advance....
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Old Apr 3, 2002 | 09:36 PM
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I think that is mostly b/c there are many guys on this board w/ big hp and torque numbers w/ T-tops. It is true that the T-tops take a lot of strength or "stability" out of the car, but this can be cured w/ a set of subframe connectors. These are a must for any t-top 3rd gen. I am getting ready to order my from Spohn.
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Old Apr 3, 2002 | 09:36 PM
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Car: 1992 B4C 1LE
Engine: Proaction 412, Accel singleplane
Transmission: built 700R4 w/custom converter
Axle/Gears: stock w/later 4th gen torsen pos
two words; subframe connectors. check with SPOHN (look at top of your screen at the banner)
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Old Apr 4, 2002 | 12:05 AM
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From: chi-town
i know of a 8 second thirdgen that has T-TOPS

yes sir i do

you might have even seen it in procharger ads, guys name is mike paulson
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Old Apr 4, 2002 | 02:47 AM
  #5  
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how exactly do sub-frame connectors help?
do they just provide stability? thanks.
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Old Apr 4, 2002 | 05:16 AM
  #6  
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Well.... sub frame connectors, connect the front and rear sub frames making them essentially one. this makes for a much more rigged chassis, similar to a truck I guess.
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Old Apr 4, 2002 | 12:56 PM
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Thats old school
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Old Apr 4, 2002 | 02:15 PM
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Car: grand prix/84 z28
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I have heard that too,

I have heard a million people say some simular about t top camaros. they tole me that they do not run as fast as the hard tops. When question further they did not really know why they just seem to say it.

I think they are just jelous, I love my ttops

:lala: :lala: :lala:
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Old Apr 4, 2002 | 02:59 PM
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From: Timrå, Sweden
Car: 1984 Corvette
Engine: Turbo 350
Transmission: 4L80E with TCI T-Com
My friend has a 86 IROC with t-tops and it <b>IS</b> electronically speed limited to 200 kph ( 125 mph ). At high speed there is a high vaccum above the t-tops and as I understand the targa locks are not designed to hold at a higher speed. (some saftey factor added ).

I don't think that the non targa cars have that speed limit.
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Old Apr 4, 2002 | 03:07 PM
  #10  
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From: portland, Maine USA
Car: grand prix/84 z28
Engine: 4.6 Northstar
Transmission: t-56
oh

that sounds mad, Would not want to go air borne.
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Old Apr 4, 2002 | 03:08 PM
  #11  
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From: chi-town
Originally posted by JoBy
My friend has a 86 IROC with t-tops and it <b>IS</b> electronically speed limited to 200 kph ( 125 mph ). At high speed there is a high vaccum above the t-tops and as I understand the targa locks are not designed to hold at a higher speed. (some saftey factor added ).

I don't think that the non targa cars have that speed limit.
how is that? in 86 the speedos were mechanical

i have taken my car up to 135mph when it was stock and my t-tops didn't go anywhere and didn't encounter any speed limit
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Old Apr 4, 2002 | 03:10 PM
  #12  
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From: portland, Maine USA
Car: grand prix/84 z28
Engine: 4.6 Northstar
Transmission: t-56
Umm...

I think they had digital Speedos and tach as an option.
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Old Apr 4, 2002 | 03:14 PM
  #13  
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From: portland, Maine USA
Car: grand prix/84 z28
Engine: 4.6 Northstar
Transmission: t-56
Umm..

Ok, maybe you will not go air borne, but does that mean you have less traction?

Do you know if that is with tops on or off or does it even make a diference?

thanks:hail: :hail: :hail:
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Old Apr 4, 2002 | 03:27 PM
  #14  
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From: Timrå, Sweden
Car: 1984 Corvette
Engine: Turbo 350
Transmission: 4L80E with TCI T-Com
The speedo might be mecanical but the ECM still knows the vehicle speed. I know this because when I hook up my ALDL scanner (WinALDL) to his car MPH is displayed on the laptop. There must be a pulse sender somewhere on the speedo wire that provides the ECM with that information.

I did't say that the targas would blow off if you went faster. Just that the ECM has a speed limit to make sure. They might have removed that on the 89, but my friends 86 IROC ( 305 TPI ) has the speed limit.
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Old Apr 4, 2002 | 04:01 PM
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From: portland, Maine USA
Car: grand prix/84 z28
Engine: 4.6 Northstar
Transmission: t-56
=\

I did not think they would pop off. I was just wondering if the low pressure spot above the car would affect the rear whell traction or anything?
thanks :hail: :hail: :hail:
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Old Apr 4, 2002 | 04:20 PM
  #16  
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From: Timrå, Sweden
Car: 1984 Corvette
Engine: Turbo 350
Transmission: 4L80E with TCI T-Com
Almost all cars get a lift at the rear at high speeds. I does not matter if the car has t-tops or not.
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Old Apr 4, 2002 | 04:26 PM
  #17  
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From: portland, Maine USA
Car: grand prix/84 z28
Engine: 4.6 Northstar
Transmission: t-56
oh =(

I knew audi TTs had a lot of lift, something like 80 poeple were killed in germany just from driving at high speeds, that was when they first came out.

That is why they have the small fin thing on them now.
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Old Apr 4, 2002 | 04:35 PM
  #18  
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From: Timrå, Sweden
Car: 1984 Corvette
Engine: Turbo 350
Transmission: 4L80E with TCI T-Com
These are some numbers I found. It is front / rear lift ( lbs ) at 130 mph.

84 Corvette : 148 / 55
82 Camaro : 239 / 40
82 porsche 928 : 232 / 173
82 Toyota Supra : 290 / 57
82 Datsun 280ZX : 174 / 116
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Old Apr 4, 2002 | 04:46 PM
  #19  
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From: portland, Maine USA
Car: grand prix/84 z28
Engine: 4.6 Northstar
Transmission: t-56
WOW

That is alot of lift in the front of the camaro, did not think there would be that much,

I am not sure waht to say about that.

It is bad if I lose too much weight up front?
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Old Apr 4, 2002 | 04:51 PM
  #20  
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From: portland, Maine USA
Car: grand prix/84 z28
Engine: 4.6 Northstar
Transmission: t-56
This reminds me

AS anyone seen the movie Cannon Ball run???
It is the 70's movie. There is a lamborghini with 2 spoilers on it, one on the rear and one one the nose.

It looks butt ugly but it made me think alittle.

:lala: :lala: :lala:
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Old Apr 4, 2002 | 10:51 PM
  #21  
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I can believe the thing about high speed with t-tops on. I forget the exact equation, but when air is moving at high speeds, the pressure drops creating lift (that's how airplains fly, wings are designed so air on the top of the wing moves faster than air on the bottom), so relive to the t-tops, the air in the car is still, and if the air outside was moving at 125, the diference in pressure would be very high.
I'll stick with my hardtop, even though i don't plan on going over 130 any time soon.
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Old Apr 5, 2002 | 11:27 AM
  #22  
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Car: 1989 Camaro RS
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I don't think that you'll have any problems with a lost t-top, I've had my car at about 135 and there weren't any problems. I have heard of, and actually saw it on one of the old 70's mustangs with the t-tops, where the torque going through the frame had caused so much twist that the tops have shattered. GM took care of that problem though by switching from glass over to safety glass in the mid80's. Nothing was neater though then seeing that top just shatter, but I don't think I'd want it to bust on me.

I could see a problem with the tops lifting off if you were to only have one removed and the other locked in. THats probably why GM says to either remove them both or don't remove them at all.

-=-Mike
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Old Apr 5, 2002 | 12:41 PM
  #23  
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From: portland, Maine USA
Car: grand prix/84 z28
Engine: 4.6 Northstar
Transmission: t-56
:D

wish I could see a movie of that mustang shattering a T-Top. That sonds nice

would not want it to happen to me though.

:lala: :lala: :lala:
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Old Apr 5, 2002 | 08:43 PM
  #24  
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Car: 1992 B4C 1LE
Engine: Proaction 412, Accel singleplane
Transmission: built 700R4 w/custom converter
Axle/Gears: stock w/later 4th gen torsen pos
I believe that for two reasons, 1) saw one flyoff at the dragstrip and break 2) at 151 mph in my B4C it was so loud from the wind noise (even without having t-tops) that if I yelled something to the passenger he would not have heard it.
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Old Apr 5, 2002 | 08:47 PM
  #25  
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From: portland, Maine USA
Car: grand prix/84 z28
Engine: 4.6 Northstar
Transmission: t-56
Umm...

What is a B4C?

Sorry, I don't mean to sound like an idiot. I have been them a few places on this board and I am wondering. I am guessing it is a type of car.

thanks:hail: :hail: :hail:
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Old Apr 5, 2002 | 08:49 PM
  #26  
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Transmission: built 700R4 w/custom converter
Axle/Gears: stock w/later 4th gen torsen pos
Re: Umm...

Originally posted by Trux
What is a B4C?

Sorry, I don't mean to sound like an idiot. I have been them a few places on this board and I am wondering. I am guessing it is a type of car.

thanks:hail: :hail: :hail:
copcar edition, made in 1991 and 1992 (also later) 1992's like mine had the 1LE option (big brakes among other things)
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Old Apr 5, 2002 | 08:56 PM
  #27  
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From: portland, Maine USA
Car: grand prix/84 z28
Engine: 4.6 Northstar
Transmission: t-56
oh =D

cool, thanks :hail: :hail: :hail:
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Old Apr 7, 2002 | 01:32 PM
  #28  
metalhead212121's Avatar
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pics of sub frame connectors???

does anyone here have any pics of subframe connectors on their Camaro/ Firebird??? I looked at Spohn's website and they DID offer pictures but their pictures look like sh#t! Also are sub frame connectors a simple bolt on or is more involved than that???

Thanks in advance....
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Old Apr 7, 2002 | 02:12 PM
  #29  
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Car: 1989 Camaro RS
Engine: 355 mildly modified
Transmission: 700R4 fully modified
they usually just bolt right in depending on the kind that you get but you usually want to reinforce it by welding everything together. I don't have any pics though since I haven't done it to my car yet
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Old Apr 7, 2002 | 03:47 PM
  #30  
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From: westland, mi
here's a pic of my Kenny Brown weld-in sub-frame connectors.



there are more on my website listed in my sig.
later
larry
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Old Apr 7, 2002 | 04:14 PM
  #31  
Trux's Avatar
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From: portland, Maine USA
Car: grand prix/84 z28
Engine: 4.6 Northstar
Transmission: t-56
WOW

that is a nice setup, intercooled supercharger

me likey:lala: :lala: :lala:
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Old Apr 8, 2002 | 04:51 AM
  #32  
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From: portland, Maine USA
Car: grand prix/84 z28
Engine: 4.6 Northstar
Transmission: t-56
=)

Thanks for the subframe pics:hail: :hail: :hail:

What is the wash bottle for?

At first I thought it was water injection or something but I have not clue right now.

Thanks again:hail: :hail: :hail:
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Old Apr 8, 2002 | 05:14 AM
  #33  
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From: portland, Maine USA
Car: grand prix/84 z28
Engine: 4.6 Northstar
Transmission: t-56
=)

Can you give me teh website for the KB subframe connectors?

Thanks:hail: :hail: :hail:
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