The guy swears he has the 305 automatic. Both of our cars are automatics and I have a shift kit and computer chip. I barely beat him. The harmonic balancer on the engine was too small to be a 305 so I am doubting that it was. If it was should it be able to hang with me?

------------------
Bright red 87 GTA with 350 tuneport. Basic mods such as K&N filter, Flowmasters, Wells MAF, TPIS air foil, Accel 8.8mm plug wires with Bosch platinum plugs, Accel distributor cap and rotary buttons.Gutted cat. Hope to port runners and plenum in about 2 weeks.

 

IF IT IS A 305 TPI he only has ten less horse power.

------------------
Iroc 350 5 speed

 

Depends. An 85 shouldn't have a problem hanging with a stock 350 TPI MAF car, nor should a later speed density 90-92 car. The SD 350 TPI cars are pretty much untouchable to any near stock 305 TPI auto. What year was this 305 TPI car?

------------------
91 Trans Am WS6
5.0 TPI auto
Flowmaster 3" 2 chamber catback
Trans Go shiftkit
2000 stall converter

supposed 'peanut cammed' car (yeah, right)

MoreMoodThatMod

 

my stock 91 z28 5 speed could out run a stock lt1

 

Keep dreaming... ROFL

 

This is just my own observation, but...it seems that you can take several F-bodies, all of the same model, year, drivetrain combo...and some will be much faster (or slower) than the others. Many people with 350 TPI powered cars will claim that their cars ran mid/low 14's in stock form. Others can't get out of the 15's.

Some of this of course is due to the driver, I'm sure. Then there's also the fact that GM was not known for it's strict quality control during the time period that our cars were made. And finally, the last of our cars were produced in 92. Very few of us here are the original owners, and in most cases, several people owned your car before you did. So you may not know a) if the car was modified from a performance standpoint at some time before you got it, or b) if the car was modified in a way that would reduce performance at some point before you got it.

That being said, generally, in stock form, a 350 TPI and a 305/5 speed tend to be even as far as acceleration goes. The 305/auto ought to be slower than the 350 auto. In stock form. It probably wouldn't take a whole lot of well-placed mods to get a 305 to come close to a stock 350.

And can you believe what other people say about their cars? No. Hell no. Many people lie. Many are misinformed. A few months ago I met a guy with an 88? Formula, 350 TPI L98. He was convinced it was an LT1. So, don't let it bother you, and keep making mods. And I'll shut up now. Like I said, just my opinion.

Jed
89 Formula 350

 

I have an 85 Z TPI and also a 93 Z LT1.
As much as would like to think it would the 85 won't keep up with the 93. The 85 is hot out of the box but falls on it's face @ 4,500 rpm's thus keeping it from better #'s.
By the way it is in stock form as is the 93.

 

My 91 LB9, auto, 2.73 has beaten every 350 I have come up against. I have gutted airbox, KnN's, ported plenum and runners, dynomax catback, Performance Resource chip, manual fans, TB bypass, and Spohn adj. LCA's. I also have raced a fairly stock 95 LTI auto and we were dead even. The sd cars are faster than the mass air cars from the factory to start with. You should have seen the guys face in the 95 LTI when we crossed the 1320, it is fun running a 305 and being competitive with the 5.7's.

 

Not too surprising.... the Speed Density 305 TPI cars are all strong... all of them. 5 speed G92, 5 speed, and auto. What do you run in the 1/4? My best was a 14.9 on a terrible 2.35 60 foot, with a 93.5 MPH trap speed. That was before the tranny rebuild and new converter.

------------------
91 Trans Am WS6
5.0 TPI auto
Flowmaster 3" 2 chamber catback
Trans Go shiftkit
2000 stall converter

supposed 'peanut cammed' car (yeah, right)

MoreMoodThatMod

[This message has been edited by MrJ (edited September 17, 2000).]

 

Heh, the new T/A's get me by only 4 car lengths and he had minor mods. I didn't have my ram air at the time either so that might have helped me. Ill let you guys know how I do, my friend is picking up his 89 Formula 350 with the 2.73 B/W gears I should roast him in 1st, bark em' in 2nd, pull in third, and then he will try and pull on me but I should have a big enough lead. BTW, the only car that has beaten me so far was the new T/A and only by 4 car lengths. I beat mid 14 Stangs so I expect around low 14's with this baby. Everyone whos rode in my car asks me, "Are you sure you have a 305?!". But then again I got some nice gears, and btw, my car is running on only 7 cylinders. Nothing some accel components and MSD wires cant take care of Damn burnt out spark plugs.

------------------
90 Iroc G92 LB9
------------------
Dual Cats, 3.42 B/W, 5spd, K&N, Homemade Ram Air, TPIS Airfoil, 160 Thermo, Mobil 1 Synthetic Oil, Dexco Anti Freeze
3rd Gen Web Site

 

BTW, NO 305 TPI with AT should keep up with a 350. I think they were rated AT THE MOST of 210hp. The 350 should kill him.

------------------
90 Iroc G92 LB9
------------------
Dual Cats, 3.42 B/W, 5spd, K&N, Homemade Ram Air, TPIS Airfoil, 160 Thermo, Mobil 1 Synthetic Oil, Dexco Anti Freeze
3rd Gen Web Site

 

Oh really? You may want to think twice before you make statements like this. I have the trap speed to at least run with, if not beat, stock and near stock MAF 350 TPI cars. That's with 2.73 gears! I'll easily be pulling mid 14s with a swap to 3.42s.

One last thing... the 87 350 TPIs in the Formulas, GTAs, and T/As were rated at.....
210hp.


------------------
91 Trans Am WS6
5.0 TPI auto
Flowmaster 3" 2 chamber catback
Trans Go shiftkit
2000 stall converter

supposed 'peanut cammed' car (yeah, right)

MoreMoodThatMod

 

I don't see a stock auto 305 keeping up with a 350 auto assuming they are both MAF or Speed density. I have raced a couple of 350 IROC's one beat me really bad like 4 cars to 60 but I had really bad tires I think it would have been more like 2 if I hadn't spun em all the way to 35mph. Then I raced another 350 and got beat by about 3 cars or so to 80. I raced one and actually beat him but I think he needed a tune up quite badly. It sounded like it was missing.

------------------
TPI 305,
Gutted airboxes,
gutted MAF,
K&N filters,
Corvette Servo.
14.9@93mph

"Speed kills, wanna live forever, drive a Ford."

 

We both have an 87. Is the harmonic balancer the same from a 305 to a 350? I think he was lying about his car. I ended up ahead by 2 cars but at about 35 MPH he was in the lead. I finally pulled and won. His engine has 127,000 miles and mine has 175,000. The Jet stage 2 chip that I have shoulda been enough to smoke dude. Not to mention airfoil and shift kit. We both have flows and K&N

------------------
Bright red 87 GTA with 350 tuneport. Basic mods such as K&N filter, Flowmasters, Wells MAF, TPIS air foil, Accel 8.8mm plug wires with Bosch platinum plugs, Accel distributor cap and rotary buttons.Gutted cat. Hope to port runners and plenum in about 2 weeks.

 

Jet stage 2 chip enough to smoke the dude?

go run back to back with that chip in and the factory chip before you say that again

 

If you have a 5 speed and he has an automatic...I think you might have a chance. Might need a few mods though. Im sure an exhaust on your side would get you ahead.

 

when my 87 GTA was bone stock i could run dead even with a guy at school who had a '89 iroc 5.7l,8th vin was 8, so it was a 350 which was also bone stock, i could walk all over '94 and up stangs too, that car just ran good it came from the factory with the larger y-pipe, fat cat, and 2.75 intermediate pipe, 3.23 gears to his 3.42(89 i-roc), however on the flip side '91 TA lb9, at, 2.73 is a few fries short of a happy meal when comes to accelleration....yes it is a peanut cam motor ,which they started in 87, with auto, 305 cars. i agree with mass production theory and lack off quality control, however my 91 will cruise from tampa to cocoa beach (135 miles ) on just a 1/4 tank of gas with tops out and avg. speed of 70mph......bottom line who cares what they due stock just make them faster!!!!!! and enjoy doing it

------------------
87GTA 355TPI,A4 shooting
for low 12'

 

My '89 305 TPI 5-speed Trans Am has is faster the ALL the stock 350's I've raced, at least on the street. My car is all stock except for the gears. I think they are 4.10's. I did not put them in. The car also has stock dual cat's. The gears are great on the street with the 5-speed, but I run into a wall at 5 grand. The motor quits pulling. You have to be quick with the stick, but I've even beat modded 5.0 Mustangs. I've never raced at the track.

 

No, we both have automatics. Its just very aggrivating that I've spent money on mine and he hasnt done **** to his, yet he runs with me. Doesnt his 305 have the lil peanut cam also? I thought 305 auto's were ****ty stock.

------------------
Bright red 87 GTA with 350 tuneport. Basic mods such as K&N filter, Flowmasters, Wells MAF, TPIS air foil, Accel 8.8mm plug wires with Bosch platinum plugs, Accel distributor cap and rotary buttons.Gutted cat. Hope to port runners and plenum in about 2 weeks.

 

You must have one bunk *** , Friday afternoon-built LB9 in that T/A.... I feel for you. No peanut cam here.



------------------
91 Trans Am WS6
5.0 TPI auto
Flowmaster 3" 2 chamber catback
Trans Go shiftkit
2000 stall converter

supposed 'peanut cammed' car (yeah, right)

MoreMoodThatMod

 

HAHAHAHAHAH! What the hell did you have on ? Bicycle tires ?? LOL


------------------
92 Z28 L98 350
---------------
Ported and polished heads, ported stock TPI base, ported plenum, Comp Cams XR270HR-10 cam (lift .495/.502 duration 218/224 lobe separation 110), Edelbrock TES headers, LT4 valve springs, Crane AFPR, Flowmaster catback with LT1 style tips, MSD coil & wires...

"Take that auto, drop it in first, hold the brakes, stomp the gas and grin from ear to ear! :-)

 

My 90 Iroc 305 5spd regularly whoops on these 350 out here in Indy! I don't know why everyone puts the 305 down so much, it's just as fast with maybe some light mods. Al I had to do was take out the spare tire to be as fast as the 350 TPI's here.

------------------
"Clear your mind, relax, and float downstream."

 

An 88 305 5 speed with 3.45s could hang with my 87 350 auto with 2.77s, but just barely.

------------------
1987 Chevy Camaro IROC-Z
L98 TPI 350 (5.7L)
TH 700R-4 Transmission with 2.77:1 Rear End

Current Mods: Edelbrock TES 1 5/8" Headers, Hooker Aerochamber Cat-Back System, Performance Resource Chip with 160* Thermostat, Accel Ignition Components, K&N Filters, All Free Mods, Falken ZIEX Z-Rated Tires.

Best ET : 14.3 @ 97mph
(corrected for elevation)

 

In the 305s the 5 speeds cream the 305 autos as for the 350s vs the 305s I know I run nose to nose with the 5.7 guys
you also have to know if its a high output 305 or not there is a huge diff in proformance there plus rear gears also come into play as for LT1s I have beat one say 96 vet but I am sure it was due to the driver(he was takeing dadys vet around the block) any way I love my 305 and at 1,440,000 miles I got no complantes

------------------
Ya sure it is just an RS

B4Cyaa

1991 RS B4C
Former Nebraska Highway Patrol Car 1 of 3
305 TPI
WC T-5
Four Wheel Disk Brakes
Only Options
Rear Defrost
Am-Fm Radio
Red-int White-exe
One BA Of A 383 In The Works
Mods
Dynomax Cat Back (to hold me over till I got the $$$ for the Borla)

 

91B4C,
You have over a million miles on your ride?
You go dude!

------------------
85 IROC,tpi,t-tops,fully loaded,black with red l/s "camaro" interior,91 Bose system, Fastchip,TES,AFPR,K&Ns,92 police 700r4

"The devil drives a Camaro"

 

LOL IROCKZE

 

They weren't bycicle tires, LOL. They were just really old and worn out 245/50ZR/16's by BF Goodrich. They SUCKED really bad. However, I have Bridgestone Potenza's now and they are great.

------------------
TPI 305,
Gutted airboxes,
gutted MAF,
K&N filters,
Corvette Servo.
14.9@93mph

"Speed kills, wanna live forever, drive a Ford."

 

homer simpson said it best "DOH" typo but you know what I ment

------------------
Ya sure it is just an RS

B4Cyaa

1991 RS B4C
Former Nebraska Highway Patrol Car 1 of 3
305 TPI
WC T-5
Four Wheel Disk Brakes
Only Options
Rear Defrost
Am-Fm Radio
Red-int White-exe
One BA Of A 383 In The Works
Mods
Dynomax Cat Back (to hold me over till I got the $$$ for the Borla)

 

if they are running correctly a 90-92 L98 should run 14.0-14.5, a G92 90-92 should be around 14.2-14.7 both with decent drivers that have actually raced before.

there are always exceptions....

 

LOL now THERE is a big performane difference....taking out the spare tire....what did that give u? The spare tire weighs like 20 lbs. You guys are right though when u say our cars are inconsistent from the factory. I've seen mid 14 stock fbody's and i've seen mid 15 stock fbody's. I'm tired of hearing people **** on MAF....i've yet to lose to a SD car....now i'm not knocking a SD setup but MAF isn't that bad....

------------------
89 GTA 350 TPI(L-98)Fiberglass "Daytona Turbo" hood K&N filter air foil Stage 2 Fastchip B&M Stage 2 shift kit Flowtech shorty headers SLP 3'' exhaust Cams HI-6S igntion with PS-91 coil MacEwen white gauges overlay's SLP rear sway bar Koni's all around and one kick *** stereo!

Rice....it's whats for dinner
You can see a pic of it by going here:
http://www.hometown.aol.com/clarkemustgonow

 

Yeah man, my friend had this 305 5-speed, all stock...the thing popped wheelies everywhere and he had to buy new rear tires like once a week. If he got on it too hard from a stop flames would shoot out the tailpipes and he'd start ripping the pavement up. All stock, I swear. I think it was a speed density car with no spare tire.

 

Alright next mod remove the spare tire. It sounds like that's good for at least a second in the quarter. LOL

 

I will support the spare tire mod.Any saved weight is horsepower gained.So 20lbs is about what...2 horsepower?? You add synthetic oil to gain another 2, thats 4 horsepower at 10,000 RPM folks..It all adds up..

lol@IROCZE

Daz

 

I really find this hard to believe with only the mods you have listed unless the 95 has 2.73's. Gears make all the difference in the world when it comes to 1/4 mi.

Take it that I have a MAF set up and Auto, but with 2.73 gears, I never dropped below 15.9's and never made it out of 2nd gear before the traps.

Correct me if I'm wrong, but stock LT1's are at worst 15.0.

What aren't you telling us?



------------------
Michael Graeber

My Garage

1)83 Z-28 T-Top: Full cage, 9" w/ lad.bars, Midwest Engine Tech 406sbc,Strip Dominator, Demon Carb, Phase VI Chevy Bowtie heads, .630" Crower roller set-up, 1 3/4 coated Hookers 3" true dual exhaust th400, fuel cell & still not running

2)89 Formula WS-6 305 TPI Auto For the road: minor motor, more suspension stuff. MODS

 

15.0? Maybe in a big heavy Impala SS. An LT1 is good for at least low 14's in stock form in an F-body.

 

Yes, but you have the peanut cam. I ran better than 15.9, bone stock, with the stock tiny 2 1/4 inch exhaust and cat. As I recall... bone stock I ran around 15.7@87, w/ free mods and a gutted cat, 15.3@89.... high flow cat and catback, plus more tuning... 14.9@93.... all of these times were on worn tires with a best 60 foot of 2.3. 2.73 posi rear end, btw. One more thing I'd like to add... porting the EGR walls in the plenum and raising the fuel pressure made a world of difference in performance over stock.

------------------
91 Trans Am WS6
5.0 TPI auto
Flowmaster 3" 2 chamber catback
Trans Go shiftkit
2000 stall converter

supposed 'peanut cammed' car (yeah, right)

MoreMoodThatMod

[This message has been edited by MrJ (edited September 26, 2000).]

 

o yeah a stock 305 can hang with a stock 350 tpi, no doubt me and my cousion have 89 formulas except mine is 350 and his 305 his has about 130k miles and mine about 230k on the street or stop lights hes usally not even a car lenght away from me, but when we go to the track he is way slow, we both have autos , we go to the 8th mile track, i run 9.2 and hes runs high 10s, of coarse thats after we did some mods, but we have close to the same mods, except i do have a few more, but before i even modded my car he could allways hang with me, but then again i dont know what a true stock 350 car should run, my car has lost some serouirs compression, so i would say yes, 305 are bad little motors and they dont get much credit,

 

Time to do some porting for me then and make a AFPR.

So, I need a better cam? I want to but can't justify doing it unless I get new heads. I don't think it would be worth it to just slap a SLP cam in it unless I match the rest of the intake.

 

First of all, my Iroc hung only a half car length back from the 350's when I first got it. Taking out the spare tire was an accidental mod. I blew my tire, jacked the car up and the weak *** scissor lift crumpled over lik it was made of tin. Without the lift in the well, the tire rattles around like crazy. I took it out to make the cabin less noisy, and all of a sudden I was dead even and in some cases faster than the 350's. I don't know what your problem is, but I think some users here need to find something better to do than to criticize other peoples modifications. What works for some people may not work for others. All I'm giving is an example of one mod that I did, that made a slight improvement in the responsiveness of my car. For those that can't handle that get over it.

 

Well, having a 91 Sd tpi 305 auto, i havn't found many 350s who will race me although i'd like to. they always say I'll kill you man why would i race? I'd really like to see how i ran against one once i raced an 88' formula 5spd with TES, catco cat and an edlebrock catback. We were dead even all the way down until the end when i pulled on him about a 1/2 car length. when i came back his friends didn't believe my car was all stock. so, i popped the hood and showed them my stock LB9. The guy in the formula told me he ran a best run of 15.6 in the 1/4th. I was kinda shocked to hear that i just beat him? Is that because i have a 91 Sd? or did this guy just suck at driving? And im wondering if i could hang with a 87 IROC with a 350? (pls don't flame i'm gonna race him this weekend) i just wanna hear some opnions on what i could do to beat him
well, enough babbling
-Abe

 

I don't know what you all are talking about. Man I've got a 350 l98 with a few bolt-ons and I SMOKE every 305 I've EVER raced. I ran this one kid with an exhaust and a few other things, and he could have just as well been sitting along the road! He asked if I hade a 350 and then started making excuses about how his car was ONLY a 305 and are harder to make fast. Must be real hard, cause I ain't THAT fast!

and just one thing (blowing steam here) I live in the must screwed up town when a guy in a turbo charged civic is beating porshe 911s, C5 Vetts and acura NSXs. I don't even want to see him on the road, cause I'd have to sit there and watch his little fart can exhaust dissapear in his dust. SUCKS!

------------------
"Why StockBastard?" you might ask. Well...
84 Berlinetta body w/custom paint.
92 front/rear bumper and ground affects.
89 IROC 350tpi engine w/lots of mods.
87 3.73 possi rear w/disk brakes.
86 interior w/IROC dash.
And finally, stock Vet rims from the early 70s.(same ones used on the 69ss)
ALL IN ONE CAR!!!

 

i have a stock 305 tpi formula '88 and i race an 87 350 tpi gta and we were side by side the whole way niether one of us could pull away. and this was before a new tranny. i imagine the gta was stock to or else it wouldnt of been that good of a race.

 

Make up your mind man. You say you have a few mods while your signature says lots of mods. Plus a 3.73.

Bottom line, the car with the most matched mods wins. It does not have anything to do with a 350 vs. a 305 unless you are talking stock. You always have to consider tranny type, is your converter and gears set up to optimize the cars power band. Not to mention things like weight, traction, areodynamics .....

Get real. Give me an open check book and I'll make any motor run almost any realistic time.

Look at the guy who built a TC 4 banger Pinto that runs in the 9's on pump gas. Or your little civic bonehead that is terrorizing your neighborhood.

Hell, there's a guy on the board with incredible SC NOS 305 running 9's I believe.

So yes, a 305 sure as hell can hang with a 350. So can a 3.4 6 cylinder. So can a import 4 banger. That is simply reality, my friends.

Bottom line, the 305 does have a bad bore * stroke ratio compared to the 350, but it does not mean that a 305 is worthless. They are damn reliable and run forever. And yes, there are ones out there that can beat 350's, 406's and 454's for that matter.

So please, don't trip when you get off your 350 high horse and don't run off the road when your driving next to a 305 cause your nose is in the air.

Peace

------------------
Michael Graeber

My Garage

1)83 Z-28 T-Top: Full cage, 9" w/ lad.bars, Midwest Engine Tech 406sbc,Strip Dominator, Demon Carb, Phase VI Chevy Bowtie heads, .630" Crower roller set-up, 1 3/4 coated Hookers 3" true dual exhaust th400, fuel cell & still not running

2)89 Formula WS-6 305 TPI Auto For the road: minor motor, more suspension stuff. MODS

 

I once raced a guy in a lightly modded 5.7 IROC (headers, exhaust and some other stuff). I lost but I have some excuses: my MAF wasnt working (i broke the wire while removing the heat sinks) and I had a carload of people. Anyway I had to save a little face so I told him it was a 305 and his jaw dropped...

------------------
1986 IROC, 1992 Body Kit, 1989 5.7 IROC Engine, Crane Cam, CVX Exhaust, ADS Superchip, 24# FoMoCo Injectors, !Cat,AFPR, Airfoil,3.42, !MAF, !Airbox, K&N

 

I suppose my 2 cents is in order...

My car was dead stock until this summer. I smoked everything in sight - most memorable was a 98Z. I had a '91 RS with a few bolt-ons that gave a few people a good race. I've driven an '87 305 5-speed and that thing felt like a rocket ship. I've also driven a '92 305 5-speed and that felt way faster than mine.

Only thing I can think of is the 5-speed gave the illusion of feeling faster because they pull so hard. I'd still say a 305 TPI isn't too far behind a stock L89...? Did I really say that???

Note: future mod - spare tire removal! I believe you man. Besides, third gens were made to rattle - every bit less helps. I keep buying ones with less miles, hoping they won't rattle - but they do... Gotta love New England roads!

------------------
92 Z28 - 5.7 - Black/Grey Leather
Macewen White Faced Guages
SLP T-RAM, 24lb/h Injectors
Accell 52mm Throttle Body
SLP 1 3/4" Headers and Cat Back Sys.

Check out the T-Ram at my website: http://www.mylecdekmat.com/mike.htm

[This message has been edited by Mike 25th (edited September 28, 2000).]

 

"hang" is a such a loose term.There are too many factors to go fast not just motor.So racing does not justify which one is more powerful.So the only right answer for this question IMO is "it depends"..You have to be more specific on the combination.Also variances can also factor in.

Daz

 

My car is a rocket ship. At least on the street. It's all light to light for me. I'm running 4.10's so the car can be hard to launch. I have to say, if I raced on the strip, the 350 would beat my 305. My biggest problem is the 2'nd to 3'rd shift. I have the hardest time hitting it just right. People may not approve of street racing, but if I can beat you light to light, then I've won.

 

Also remember the stock fuel pumps are junk and weak, and some cars arnt gettin the right fuel.

 

I have a 91' z-28 305.There isn't many motor mods just roller rockers,slp runners and air foil, and an ADS chip.The rest of my mods are mostly suspension mods. I also converted her to a t-5. She can get up and go on almost any third gen I've seen.She used to see 14's last year without the t-5. Not bad for 98,xxx miles.

 

Michael G, I don't know what happened with that LTI auto car. We street raced and anything can happen. But we were door to door and I let off after the car shifted into 3rd gear. I went to a 1/8th mile track today for the first time with these mods, free stuff, dynomax catback, slp crank pulley, performance resource chip, airfoil, ported plenum, and recently installed exhaust cutout, spohn LCA's, and 3.73's. I ran a 9.4 in the 1/8. There was a 99 SSZ28 with borla exhaust and a 6 speed that only ran a 9.2. One fellow I talked to with a 89 GTA/5.7 with a ton of TPIS stuff on his car who was running 8.9-9.1 said he was impressed how good my car ran for the mods I have and it being a 305. Now I need headers, get rid of the crappy Y pipe and a converter to see low 9's maybe better.