Pontiac GTA Enhancement information and discussions with Technical DIY and performance tuning information for the hardcore Pontiac GTA Owners and Enthusiasts.
Forum | Register Now | Members | Search | How Do I... | Calendar

Go Back   The GTA Source Page Message Forums > GTA SPECIFIC > GTA DOCUMENTATION/RESEARCH

GTA DOCUMENTATION/RESEARCH Want to ask about your GTA's documentation, build codes, or other historical data? Then post it HERE!

Reply
 
Thread Tools Display Modes
Old 04-21-2010   #1
1badGTA
BAD GTA 88 5.0 TPI/T5
 
1badGTA's Avatar
 
Join Date: Oct 2009
Location: San Francisco, CA
Posts: 1,216


which is quicker? 5.7 auto or 5.0 5-speed?

I think the 5.0 is quicker.. Just how it feels. Maybe not past 60, but I think 0-60 I would bag one. hmmm.
Haven't timed it yet.

It is a heck of a lot more fun to drive and feels like a real muscle car with the stick. I am glad I picked what I did feels like a caged animal ready to run.
__________________
1988 5.0 TPI 5-Speed GTA 1 of 809 made
22,000 miles - original floor mats
1badGTA is offline   Reply With Quote
Old 04-21-2010   #2
budfreak1
stang stumper
 
budfreak1's Avatar
 
Join Date: May 2005
Location: Toronto, Oh.
Posts: 698



GTA Year: 1991
GTA Engine: 350 TPI Automatic
Re: which is quicker? 5.7 auto or 5.0 5-speed?

Quote:
Originally Posted by 1badGTA View Post
I think the 5.0 is quicker.. Just how it feels. Maybe not past 60, but I think 0-60 I would bag one. hmmm.
Haven't timed it yet.

It is a heck of a lot more fun to drive and feels like a real muscle car with the stick. I am glad I picked what I did feels like a caged animal ready to run.
Take a drive about 2.5 hours East and we can find out.

Seriously, glad you like your ride. You should come out for a track meet one of these times at national trail or dragway 42.
__________________

My Cardomain
1991 GTA L98 SuperRam- 13.5@98.7 MPH
1987 GTA L98: Flame Red(R.I.P.)
Road Demon:1992 Subaru SVX- Worlds fastest street N/A auto SVX record holder
1997 Silverado 350: Daily ride
budfreak1 is offline   Reply With Quote
Old 04-21-2010   #3
merc3065
Registered User
 
merc3065's Avatar
 
Join Date: Aug 2006
Posts: 2,057


Re: which is quicker? 5.7 auto or 5.0 5-speed?

It might be quicker from the start, but the auto is faster through the 60-80 range.

3.45:1 gears vs 3.27:1
200ish hp to 220ish hp
290ish ft/lbs to 330ish ft/lbs

Like I said, might take off on the lead, but the 350 will push faster in the 1/4 mile overall speed due to more horsepower.

The manual with a good driver will beat a good driver in the auto
The auto will run more consistently than a manual driver in the 1/4 mile

But like I said, expect a higher mph at the traps from the 350 vs the 305.
__________________
merc3065 is offline   Reply With Quote
Old 04-21-2010   #4
BigBadGTA
Vegas Cruiser
 
BigBadGTA's Avatar
 
Join Date: Jan 2009
Location: Las Vegas, NV
Posts: 644



GTA Year: 1988
GTA Engine: 350 TPI Automatic
Re: which is quicker? 5.7 auto or 5.0 5-speed?

I raced my friends TPI 305 5 speed Iroc and a 305 tbi z28 and I beat both of them, the tbi camaro was pitifull. He got all excited that he won but I spun the tires through the whole intersection and he got ahead.. Next time I took it easy and just left him in the dust. I beat the 305TPI 5 speed by about 2 lengths and let off around 65, and I spun the tires and got sideways leaving the light...
__________________


1988 GTA, 5.7L 350TPI

Visit My Cardomain! LINK

Last edited by BigBadGTA; 04-21-2010 at 09:45 AM.
BigBadGTA is offline   Reply With Quote
Old 04-21-2010   #5
GTA88
Gary
 
GTA88's Avatar
 
Join Date: Mar 2010
Location: East Hartford
Posts: 217



GTA Year: 1988
GTA Engine: 350 TPI Automatic
Re: which is quicker? 5.7 auto or 5.0 5-speed?

My buddy has a 305 5 speed z28 with work done to it and my 350 auto GTA blows the doors off it. 350 auto is faster then a 305 5 speed!!
GTA88 is offline   Reply With Quote
Old 04-21-2010   #6
Rodimus_Prime
Registered User
 
Join Date: Nov 2009
Location: Harrisburg, PA
Posts: 277


Re: which is quicker? 5.7 auto or 5.0 5-speed?

I beat a 305 with my mostly stock cavalier, before it was supercharged. I love GTAs, but 305s arent beating anyone.
__________________

1989 Turbo Trans Am #82
2007 Cobalt SS G85, Harrop 1320LSJ 75MM, 298hp 254tq
Rodimus_Prime is offline   Reply With Quote
Old 04-21-2010   #7
1badGTA
BAD GTA 88 5.0 TPI/T5
 
1badGTA's Avatar
 
Join Date: Oct 2009
Location: San Francisco, CA
Posts: 1,216


Re: which is quicker? 5.7 auto or 5.0 5-speed?

Quote:
Originally Posted by Rodimus_Prime View Post
I beat a 305 with my mostly stock cavalier, before it was supercharged. I love GTAs, but 305s arent beating anyone.
I have a 305 TPI with 5 speed. it has 10 HP less than the 350 of the same year with better gearing and posi with taller gears that were standard for 5 speed. The 305 with auto for the same year made 195 HP. less than mine.
from this sites RPO figures
GM3 -- Rear Axle Ratio (3.45) -- 809 _ all 5 speeds
GW6 -- Rear Axle Ratio (3.27) -- 6,912

This will get it faster to 0- 60 I think with only 10 HP less.. or it will be neck to neck. but again... mine is more fun doing it.. let me tell you

also the Z28 wasnt a TPI I bet the tpi
__________________
1988 5.0 TPI 5-Speed GTA 1 of 809 made
22,000 miles - original floor mats
1badGTA is offline   Reply With Quote
Old 04-21-2010   #8
87bucketgta
BACKDOOR STRANGER
 
87bucketgta's Avatar
 
Join Date: Jul 2007
Location: KANNAPOLIS
Posts: 1,072


Re: which is quicker? 5.7 auto or 5.0 5-speed?

The 305 was never gm's strong suit, The gearing of the 5 speed makes it feel alittle torquier but thats about it, 350 wins everytime
87bucketgta is offline   Reply With Quote
Old 04-21-2010   #9
90 L98 TransAm
Registered User
 
Join Date: Mar 2006
Posts: 458


Re: which is quicker? 5.7 auto or 5.0 5-speed?

Source: Road & Track Performance Cars '90

1989 Chevy Z-28, 5.7L, 240 BHP, 345 lb-ft, 4 spd auto, Final Drive 3.27

0-60 6.6 seconds
1/4 mile in 15.2 @91.5 mph
Top Speed est 145 mph


1991 Pontiac Firebird Formula, 5.0L, 225 BHP, 300 lb-ft, 5 Spd manual, Final Drive 3.42, Dual cat exhaust

0-60 6.6 seconds
1/4 mile in 15.2 @92.6 mph
Top Speed est 135 mph
__________________
Vortech V-3 SC, 11+ psi boost
0 - 60 in 5.40 Seconds
1/4 mile in 13.9 seconds @ 103 mph @ 5,000' elevation, 309 HP (per Escort GT-2 meter)
Shift kit, 9 clutch 3/4, Corvette servo
Magnaflow 16829 catback exhaust
TDS fr. sway bar bushings and end links. Wonderbar
90 L98 TransAm is offline   Reply With Quote
Old 04-21-2010   #10
88 Black GTA
GTA fanatic
 
Join Date: Apr 2007
Location: Owatonna, Mn
Posts: 153


Re: which is quicker? 5.7 auto or 5.0 5-speed?

Back inthe early 90's a frind of mine had a '88 Mustang GT with a 5 speed. He raced several IROC's/Trans Am's and he told me that the 5.0's gave him a better race than the 5.7's. I would give him a hard time and say "why, were the 350's just too fast to keep up with"

I have never raced someone with a stock 305 but I don't think I would be to worried. Throw a couple mods in though and it might change things a bit.
__________________
1988 GTA 5.7/700R4 Black/Black leather

Firebird owners of Minnesota - Facebook.
88 Black GTA is offline   Reply With Quote
Old 04-21-2010   #11
90 L98 TransAm
Registered User
 
Join Date: Mar 2006
Posts: 458


Re: which is quicker? 5.7 auto or 5.0 5-speed?

Note that they did say in the Road & Track article that the Formula they tested weighed 250 lbs less than the the GTAs/TAs. The Z-28 had a curb weight of 3,500 lbs while the Formula weighed 3,320 lbs. So performance stats for 5.0 L GTAs/TAs would have been a bit slower.
90 L98 TransAm is offline   Reply With Quote
Old 04-21-2010   #12
FearThisGTA
"The only thing to fear is.............fear itself"
 
FearThisGTA's Avatar
 
Join Date: Jun 2003
Location: In front of you....
Posts: 4,742



GTA Year: 1991
GTA Engine: 350 TPI Automatic
Re: which is quicker? 5.7 auto or 5.0 5-speed?

My youngest step-son had an 87 Z-28, with the 305 tpi, and at, and he ran a consistent 15.0. After he sold it to a friend, he and his brother did a few cheap mods, it ran in the high 14's but that is it. My car on a bad day ran 14.90. Even the first time I took it out it turned out a 14.80'ish with a 2.6 60'.
So, to answer your question, the 5.7L without a doubt, hands down, unless it has a lot of mods and the 5.7 doesn't.
__________________


Cliff Jones
1991 GTA Trans Am
w/305,231 miles
on the original motor!!!!
Time of Death on motor, 4:07pm on 05/29/2010.
Hp:211.2@4200rpms/Tq.328.5@2700rpms
Best et: 13.959@97.05mph
Best mph: 98.3
Best 60' : 1.875 on BFG Comp TA's w/ 32 lbs of air in them
FearThisGTA is offline   Reply With Quote
Old 04-21-2010   #13
ThunderChicken
Hoarder
 
ThunderChicken's Avatar
 
Join Date: Mar 2009
Location: Fall Branch, TN
Posts: 936


Re: which is quicker? 5.7 auto or 5.0 5-speed?

What about an original automatic car (3.27 posi) with a 5-speed swap?
__________________
Bethany--1988 GTA Trans Am--Flame Red Metallic 305, 1995 V6 Bird, 2001 V6 Bird, 1998 NBM T/A


Click here for Firebird Fest of the Carolinas Information!!
ThunderChicken is offline   Reply With Quote
Old 04-21-2010   #14
TTA850
Registered User
 
Join Date: Jun 2005
Posts: 55


Re: which is quicker? 5.7 auto or 5.0 5-speed?

Years ago I ran my 89 GTA when it was just about stock, I think it only had a flowmaster replacement muffler and free mods, and it went 14.66. Around the same time a friend of mine had an LB9 5-speed Trans Am with a 3.08 rear and the same muffler/free mods done and it went 14.89. This was a long time ago but I'm fairly certain of the times and was impressed with his car and driving.
__________________
2002 Trans Am WS6 - Sunset Orange Metallic - stock for now
1998 Trans Am - Bright Green Metallic - 12.08@110 bolt ons

1989 GTA - 10.5 second TTA spec 3.8L - Featured in GMHTP May '07 "Red Draggin"
1989 TTA #884 - 1 of 15 cloth/hardtop
TTA850 is offline   Reply With Quote
Old 04-21-2010   #15
GTA50
Registered User
 
Join Date: Jun 2007
Location: Chilliwack, B.C.
Posts: 653


Re: which is quicker? 5.7 auto or 5.0 5-speed?

Holy crap!!!! This is starting to sound like a TGO thread.

From the standpoint of hp, with the least losses through the drivetrain and the better rear-end, I would give the edge to the 305/5-speed to come out even with (if not slightly ahead of) the 350. But for acceleration, the key is torque and of course the 350 has the definite edge. As was said earlier, the margin is pretty close and depends on the driver.

On the other hand, any newer import V-6 with an auto will kill both cars.

So, just enjoy a fantastic piece of North American automotive engineering from 20+ years ago.....
GTA50 is offline   Reply With Quote
Old 04-22-2010   #16
FearThisGTA
"The only thing to fear is.............fear itself"
 
FearThisGTA's Avatar
 
Join Date: Jun 2003
Location: In front of you....
Posts: 4,742



GTA Year: 1991
GTA Engine: 350 TPI Automatic
Re: which is quicker? 5.7 auto or 5.0 5-speed?

Quote:
Originally Posted by GTA50 View Post

On the other hand, any newer import V-6 with an auto will kill both cars.
Hmmm, not if its been modded....

Ask me how I know,lol....
__________________


Cliff Jones
1991 GTA Trans Am
w/305,231 miles
on the original motor!!!!
Time of Death on motor, 4:07pm on 05/29/2010.
Hp:211.2@4200rpms/Tq.328.5@2700rpms
Best et: 13.959@97.05mph
Best mph: 98.3
Best 60' : 1.875 on BFG Comp TA's w/ 32 lbs of air in them
FearThisGTA is offline   Reply With Quote
Old 04-22-2010   #17
1badGTA
BAD GTA 88 5.0 TPI/T5
 
1badGTA's Avatar
 
Join Date: Oct 2009
Location: San Francisco, CA
Posts: 1,216


Re: which is quicker? 5.7 auto or 5.0 5-speed?

Quote:
Originally Posted by GTA50 View Post
Holy crap!!!! This is starting to sound like a TGO thread.

From the standpoint of hp, with the least losses through the drivetrain and the better rear-end, I would give the edge to the 305/5-speed to come out even with (if not slightly ahead of) the 350. But for acceleration, the key is torque and of course the 350 has the definite edge. As was said earlier, the margin is pretty close and depends on the driver.

On the other hand, any newer import V-6 with an auto will kill both cars.

So, just enjoy a fantastic piece of North American automotive engineering from 20+ years ago.....
This is kinda what I have heard. that the 5.0 will have the 5.7 to 60 (stoplight to stoplight) then the 5.7 will blow by it...

Mike
__________________
1988 5.0 TPI 5-Speed GTA 1 of 809 made
22,000 miles - original floor mats
1badGTA is offline   Reply With Quote
Old 04-22-2010   #18
1badGTA
BAD GTA 88 5.0 TPI/T5
 
1badGTA's Avatar
 
Join Date: Oct 2009
Location: San Francisco, CA
Posts: 1,216


Re: which is quicker? 5.7 auto or 5.0 5-speed?

any 88 5.7 in Columbus wanna test?
__________________
1988 5.0 TPI 5-Speed GTA 1 of 809 made
22,000 miles - original floor mats
1badGTA is offline   Reply With Quote
Old 04-22-2010   #19
FrankieRider2
Site Administrator
 
FrankieRider2's Avatar
 
Join Date: Oct 2000
Location: North Central Arkansas
Posts: 2,233



GTA Year: 1988
GTA Engine: 350 TPI Automatic
Re: which is quicker? 5.7 auto or 5.0 5-speed?

Over the years, I have always heard a LOT of the outcome depended on the driver. Now bear in mind that I have only driven one 5.0L/M5 GTA ever and it was an '88 model like mine. But I would think that some of the later 5.0Ls could give the '87-'89 5.7L cars a good run, and maybe even the 240-hp later 5.7Ls.

I know it was as fun as hell running through those gears, but the car nosed over way before my '88 5.7L did.
__________________
Frankie Rider, 2
Administrator
The GTA Source Page

E-Mail
FrankieRider2 is offline   Reply With Quote
Old 04-22-2010   #20
1badGTA
BAD GTA 88 5.0 TPI/T5
 
1badGTA's Avatar
 
Join Date: Oct 2009
Location: San Francisco, CA
Posts: 1,216


Re: which is quicker? 5.7 auto or 5.0 5-speed?

Quote:
Originally Posted by FrankieRider2 View Post
Over the years, I have always heard a LOT of the outcome depended on the driver. Now bear in mind that I have only driven one 5.0L/M5 GTA ever and it was an '88 model like mine. But I would think that some of the later 5.0Ls could give the '87-'89 5.7L cars a good run, and maybe even the 240-hp later 5.7Ls.

I know it was as fun as hell running through those gears, but the car nosed over way before my '88 5.7L did.
I just did a 0U
0-60 test.... I got 6.5
__________________
1988 5.0 TPI 5-Speed GTA 1 of 809 made
22,000 miles - original floor mats
1badGTA is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
How rare are 88 GTA 5 speed with 5.7 & t tops? Jeorge GTA DOCUMENTATION/RESEARCH 50 06-24-2010 06:20 AM
89 5.7 T top? or 88 5 speed T-top? 1badGTA GENERAL DISCUSSION (NON-GTA) 44 11-02-2009 06:29 AM
1989 Red GTA 5.7 V8 auto For sale Canadajc GTA CARS FOR SALE 7 07-02-2006 11:44 PM
slp headders1.75 +chip for 5.7 auto Wildstyle GTA PARTS WANTED 0 08-16-2002 11:25 AM
Speed Density Vs. MAF REMOVED USER GTA TECH 5 08-21-2001 05:14 AM


All times are GMT -5. The time now is 01:10 AM.


Powered by vBulletin® Version 3.8.5
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.