I can't decide to buy a 350 auto or a 305 stick. Which one is faster 1/4 mile. Both tuned port cars. I would like Prefferably an 87 iroc. 350 auto or 305 stick please help!

1985 t-type regal 3.8 turbo

 

depends on if you wanna mod or not. If you get one of the late 80s model 305 with 230hp and a 5spd there pretty much as fast as a stock 350. As far as mods go, if you wanna mod, buy the 350 they are so much easier to mod and they'll give you a lot more power in the long run. Personally I'm swapping my 305tpi out for a 350 and gonna drop a T-56 manual in it. That way I get the best of both worlds. Manuals are better (in my opinion), there more fun and the 700r kills 20% of your flywheel horses.

 

A 305 5spd with G92 option can run just as fast as a 350.

But I would get the 350 auto, once you start moddin, the extra cubes will help.

check out the mid atl board too for a huge 3rd gen meet in the worx.

 

They are both pretty even stock, depending on what condition their in, but once you start modding the 350 gains more over the 305 for obvious reasons.
-Mark

 

The 350 Auto's are faster. Especially the G92's. Yes the 305 5-Speeds are quick but they just are not as fast stock and don't have the same potential. They might have some good HP, but not the Torque.

 

Stock, they're very close.... within 2-3 tenths of eachother. But the stick is more fun overall(as long as you dont spend your life in traffic).

 

The problem with the 305 manual is that it is weak. I blew up 2 of those T5's with a 305 4bbl in my first T/A. That said, I'd find a 350TPI car and pout a T56 in it. Manual trannys are much more fun to DRIVE. If all you want to do is bracket racing at the drag strip, then buy an auto, but if you want to DRIVE that car, or AutoX it from time to time, get a manual. The later 305's were snappy and quick, but they really give up alot in the torque deptartment and as we all know torque is what gets you out of the hole and off of the corner. I say you get more bang out of a 350, and when you decide you need more, they are easily modded for lots o power.

 

That all depends...

How fast do you want to go? Do you just want to have a fun, quick car...or are you looking to create a street monster? Are you willing to do a motor swap or other major work to the car?

If I were to build a thirdgen again this is what I'd do...

-Get a car with solid body/paint
-remove all signs of 80's technology (computer/tpi)
-swap in a built 350 or 377 or 400...etc.
-run a big cam and a carb
-run a th350 w/ converter
-3.73's minimum

But then again, thats not for everyone. Im pretty much only interested in going fast quickly. I cant see myself building an auto x car with a thirdgen...but Im not saying it wouldnt make a great car, I just wouldnt find it interesting.

You should know what you want out of the car before you decided what you want to get.

-Doug

 

I want a quick car to do easy mods like (exhaust, chip, and little stuff like that but nothing as major as a motor swap at the most a supercharger so ill stick with the 350 i guess thanks.

 

Good decision.

 

put a stall converter in the L98 car and kiss the 305/5 speed good bye.

 

i dunno about that unknown.....the lb9 t-5 can launch ***** to the wall....do a 4500 clutch drop and by the time the tires stop spinnin your grabbin 2nd....its all in the launch stock for stock a tc for the l98 will help dramatically but like i said the 305 can lauch ***** out....put some slicks on the 305 and watch the 305 pull away....just cuz its a smaller motor dont underestimate it dtock for stock.....

 

true, but keep dumping the clutch@4500 with that T5 for a while you'll be picking up pieces of T5 all over the place asking why didn't you just go with a automatic lol

 

Do you really need to ask me what I would preffer?

T5 can definatly hold thier own, getting an 88+ will get ya a World Class T5 that can hold even better than the Normnal T5 even though my all out favorite year is the 87.

In 87 the 305 5 spd. and 350 tpi wre only 10 hp difference as well as the up coming years because 305 5spd's were fortunate enough to recieve the L98 cam instead of the peanut.

My friend Chirs has a 355 that runs 12's and it is attached to a WC T5.

 

i know quite a few people are running in the 12's with T5's. Its still playing russian roulette

 

Yup well said. I know plenty of people putting big cams in stock shortblock small block chevys and winding em to 6500+ rpm, doesnt mean it is a good idea.

 

Hey, if it works don't fix it.

If it breaks, rebuild it twice as strong.

 

true, whatever floats your boat i guess, you won't see my car with a stick in it, it'll slow me down with my motor..

 

Seeing as how ya have a TTA motor, the Auto will do ya just fine

 

very true but thats when u get a tremec tko lol...and if u break that....u need to go auto lol....i think thats pretty im pressive that a stock t-5 can run some pretty good times like 12's....how much power would that be?

 

why dont you go old skool. take a 327 with camel hump heads a 501 bumpstick cam and a m22 and you will own all and walk all
and this is all youll be doin

 

I would go for the auto.

I blew 3rd gear in my t5 the other night, and i'm not even getting 170hp at the wheels.

If you buy the 305/t5 and do any sort of mods, like fly89gta said, you'll be playin russian roulette.

FYI, Road & Track tested the new 87 IROC-Z 305/t5, which ran 14.9 down the quarter. Automobile tested the new 87 IROC-Z 305/auto which ran a 14.6 down the quarter. It's hard to compare, but hope that helps.

 

i wonder if the LT1 guys argue with the LS1 guys like we do here

 

no cause the LS1 is better engine and everyone knows it, lol

We aren't really arguing, just having a nice calm debate

 

I don't care if the T-5 is crappy and the 305 a pooch. No sports car should have ever been sold without a clutch pedal. The only reason that the TTA is faster with an auto is that is can build boost on the line.

 

is that the ONLY reason? um I think not man, get your facts straight before making statements like that, there are many more reasons than just that...but its late i'm not going to go explaining it again...

 

Once you get off the line there would be no reason that a manual tranny would "make you slower".

 

LOL!! oh no? so tell me, how would you keep the boost once the clutch is pressed in and the load goes off the engine?? no load=no boost and the TTA motor is not a high revving turbo motor like imports.

Also GM tested a stick behind a turbo 3.8 and the results SUCKED, but I guess you already knew that

Oh yeah and a T5 holding up 400+ ft. lbs of torque consistantly? nope, sorry...

 

Take it easy. I never said that I was a TTA expert. I also never said I was talking about a T-5. Just relax. I work around semi-trucks a lot. The diesels are turbo charged and they won't rev over 3000 RPMs most of the time. They have no problem using a manual (and there are autos, they aren't faster or better). Try not to freak out though.

 

i'm fine don't worry :sillylol:

its been tried though, manuals don't work well with the turbo 3.8, can it be made to work well? sure better have VERY deep pockets

 

STICK SHIFT FOREVER :rockon: :rockon:
but I love the 350
but I will stick to my morals, I will never obtain an automatic sports car, no offense to anyone but I like stick it's awesome, so man I say get a stickshift and then replace the engine.... alot easier and funner than getting an automatic. trust me I'm doing a freaking conversion and it sucks

 

how much power would it take to get to mid 12's witha t-5?

 

not much just a cam and intake

 

on what kind of engine???

 

im gonna throw some parts at my 91 lb9 pretty soon...before i build up a 350....im gonna put a cam in it port my heads and probly an lt1 intake on it....what do u guys think

 

LT1 intake seems to be to much flow for a 305, as well as all of the other intakes out there "mini ram, stealth ram, etc."

Just modding the TPI intake on a 305 is good enough.

 

get a better exhaust before ur manifold

 

agreed

 

ron mullins on this board put a lt1 on his lb9...he used world torquers whihc will flow less then my ported 081 castings..and hes using less cam that im going to...im shootin for 350 horse and i have no doubt ill get it.....i do agree that an lt1 intake on a STOCK 305 will be to much but my 305 will not be stock by any means...

if you remeber back in the early 90's gm put out a 4.8 "mini lt1" for the basic caprice and some police got it aswell...along with the 350 lt1....the 4.8 preformed pretty well...220 horse i beleive....

back to my original question...with 350 horse and 400 ft pounds and a t-5 with 3.42 gears put me into the 12's

 

There is no way someone could actually answer that question for you since we dont know your eleveation, etc.

But I do know the new corvett'ss have about 400hp and even more tork and they run high 12's.

So I would have to say no, you won't get to into twelves.

 

my elevation at the track i will be running at is a tad under 600 feet...i thought the zo6's ran 12.50's.....405 horse and 405 ft pounds....

ls1's are 320 horse and 335 ft pounds and they run 13.2's they also have 3.42's and there first gear isnt as agressive as a t-5...ill have 30 more horse and 65 more ft pounds...why wuldnt i break the 12's?....

my dad has a 2001 z28 bare bones..i mean nothing in it just air...and his ran a 13.34....i have to beat him!!!...

 

Z06 runs 12.5 with a Pro driver. The average driver would get a 12.8 or so.

I'm just stating an opinion, if you break 12's more power to you.

It's good to aim high, but its anothe thing to set yourself up for disapointment.

Is you HP & Tork under the hood, or at the rear wheels??? There is a big difference.

 

I have seen plenty of 02 z06's run 12.2's stock and 11.9 on just an et street, they are faster than high twelves if you know how to shift

 

yea a big iffy for most

 

thats flywheel just like the z06...id be down about 50 horse but id have the same torque....so does that mean my e/t would be a bout the same but my speed would be a little slower?

and when i ran my ride i drove it like i hated it.. lol...i got a 14.4 out of it....with a crappy 60 ft 2.25

 

ur et will be alittle bit higher but not by much. your trap speed i would guess would be maybe 2-5 miles slower

 

i could definetly live with a hi 12..especially with a 305

 

lol i would love to see low 12's through a t-5

 

would a completely souped up 383 with a t-5 get into the 12's? and I mean souped up as every part of the engine performance.

 

i agree with 17