Fast355

iTrader: (2)

My 80 Vette was getting roughly that with a richly tuned Holley 4bbl and a 3spd Auto with 3.07 rear gear. Cruising 85-90 was around 3k, the heads/cammed 305 loves to spin.

1991sleeper

iTrader: (-3)

Yes sir ... At 65mph at 75 it drops to bout 19-20

91' bird 305 TBI T-5, trick flow 175 cc heads, 4.10 gears, lots of suspension upgrades. 24mpg @ 2500rpm hwy. 8.63@ 85mph 1/8th on street tires... 8.000's soon

1991sleeper

iTrader: (-3)

Ghettobird ... If u have an auto trans and want decent mpg ho 3.43 .... If ur not too worried about MPg go 3.73 and use a 28" tall tire to take some gear out ... If u have a T5 go straight to 3.73 .... With 4.10's and 28.5" tall tire I'm basically running a 3.80 gear ... All gear ratios are based on a 26" tire .... And right now 75mph is about 2500rpm

91' bird 305 TBI T-5, trick flow 175 cc heads, 4.10 gears, lots of suspension upgrades. 24mpg @ 2500rpm hwy. 8.63@ 85mph 1/8th on street tires... 8.000's soon

Ghettobird52

im confused what do you mean? (sorry dont know speed/racing lingo lol)

Yeah man i got the lazy 700r4! Im honestly getting ready (couple months) to be doing a rear swap and was in debate between 3.42's and 3.73's Im still running stock 26" with the 2.73's and this thing has NO get up from a dead stop. Once i have the gears/tranny spinning slightly around 1800-2000 all the torque is just ready for action. Tranny is also leaking so was going to get it built slightly with a shift kit, corvette servo and a 2000rpm stall. When i was going to rear swap i was probably going to upgrade to bigger tires as well, what rims are you running? and no problems with rear wheel wells? The car is my DD right now but i use my moms (dont make fun of me lol) beater when im doing any long distance freeway driving so i think i will be ok with 3.73's idk though.

1991sleeper

iTrader: (-3)

At 65mph I get around 23-24 at 75 mph it drops to bout 20 mpg ...

And 3.73 with auto trans would b about the same as 4,10's with 5speed as far as cruising speed .. So u would b running bout 2500rpm @ 70mph with 3.73 and 26" tire ... And I'm running C6 wheels with 2" spacers and can run a 28.5 by 10" tire with minimal modification if any

91' bird 305 TBI T-5, trick flow 175 cc heads, 4.10 gears, lots of suspension upgrades......... 24mpg @ 2300rpm hwy 65mph ........ 8.63@ 85mph 1/8th on street tires... 8.000's soon

Ghettobird52

**** well thats not too bad, and i dont do much freeway driving so i think i can pass with 3.73's! Well im off to under my car tomorrow with the sawzall hacking off my old exhaust system installing my hookers 2055's and getting my magnaflow cat & flowmaster catback welded up on saturday. Hopefully looking to pick up some lost hp/tq from my shitty exhaust system, has exhaust leaks all down it! it's horrible

1991sleeper

iTrader: (-3)

Yea full exhaust is next on my list mine is horrible ... May just do all custom **** at my dads house ... Make me some custom headers 1.75 stepped down to 1.625 full length with 3" collectors and custom exhaust

91' bird 305 TBI T-5, trick flow 175 cc heads, 4.10 gears, lots of suspension upgrades......... 24mpg @ 2300rpm hwy 65mph ........ 8.63@ 85mph 1/8th on street tires... 8.000's soon

1991sleeper

iTrader: (-3)

Or dual 2.5" straight pipes dumped at axle :-o loud !

91' bird 305 TBI T-5, trick flow 175 cc heads, 4.10 gears, lots of suspension upgrades......... 24mpg @ 2300rpm hwy 65mph ........ 8.63@ 85mph 1/8th on street tires... 8.000's soon

Ghettobird52

I would say build your self some headers like your talking about (those would be awesome, full length obviously) and go Dual's 2.5" dumped over the axle!!! It would sound amazing!!!

1991sleeper

iTrader: (-3)

Yea I think some custom stepped headers would really wake this thing up with the proper exhaust ... And hopefully I can get the primaries tuned to a good length ... I may buy a mini starter before even attempting this so I have a lil more room to play with ... These 1.5" primary. Shorties are killing it IMO

Edit: or if anyone wants to donate some longtubes for a broke *** laid off thirdgenner that would b great too lol

91' bird 305 TBI T-5, trick flow 175 cc heads, 4.10 gears, lots of suspension upgrades......... 24mpg @ 2300rpm hwy 65mph ........ 8.63@ 85mph 1/8th on street tires... 8.000's soon

1991sleeper

iTrader: (-3)

Some of y'all know where my air filter is located ... So I got bored last night n did this .. It ain't reap pretty but should work to keep a high pressure area around the filter instead of low pressure ... Lmk what u think .... I'm eventually gonna make the whole panel out of aluminum















91' bird 305 TBI T-5, trick flow 175 cc heads, 4.10 gears, lots of suspension upgrades......... 24mpg @ 2300rpm hwy 65mph ........ 8.63@ 85mph 1/8th on street tires... 8.000's soon

1991sleeper

iTrader: (-3)

Grrrrr! This tunning **** is driving me up a wall !

91' bird 305 TBI T-5, trick flow 175 cc heads, 4.10 gears, lots of suspension upgrades......... 24mpg @ 2300rpm hwy 65mph ........ 8.63@ 85mph 1/8th on street tires... 8.000's soon

Mr.ChevyStroker

Dude! Awesome build thread!!! I just took an hour reading everything and going through your post. I'm glad you went this way! I wanted to before and this is legit. Go to a dyno place as they can help with you tuning problem. I am going to be dyno'ing my stock lo3 later today and then decide if I want my lt1 cam tossed in there. Im asuming 160ish. hopefully. A floor dyno/chassis dyno should be able to help you get the proper tune and get your numbers! Then you need to go out and start stompin on some 4th gens xD

1991sleeper

iTrader: (-3)

Thanks man ... I kinda wish I woulda went with a little bigger cam and Mabey a striker crank while I was in there ... But oh we'll there's always next time

Mr.ChevyStroker

That cam is probably almost perfect when you get the proper tune itl be legit.
As for my dyno run. With the full exhaust no cat, 3.73s 5 spd and 10 degree adavanced base timing I made 155 hp and 200 tq.Which about 10 more horsepower then factory rating at the crank which was 170 and then also about 10-20 pounds of tq as well at the crank. I wanna see some videos man. Keep up the build! As for me im gonna do a 350 vortec swap here probably in the next couple days.

1991sleeper

iTrader: (-3)

There's a few videos posted in this thread ... Just build u a bad *** 305 I wish I woulda stroked it to a 334 ... Or build a 327 screamer lol

1991sleeper

iTrader: (-3)

And on the cam it is a good combo but I wish I woulda went up to 218-220@.050 with a 114 lsa or atleast went with 112 lsa with the current specs

The lift is right in the sweet spot for the heads with the 1.6 rockers

Mr.ChevyStroker

You think that woulda made 400 whp with that bigger duration cam and lsa?

1991sleeper

iTrader: (-3)

Idk about whp but I'm shooting for 380-400 fwhp with the current setup .. After some good long tubes , mandrel bent exhaust system, and a better intakke manifold with it tuned right I believe it will b at the top of that range ... So with a 220 @ .050 at 112 lsa I think 400 whp is possible ... But would sacrifice some drive ability and mpg so if I went with the bigger cam I'd stick with the 114 lsa ... With the current setup I shift at 5800-6k so the bigger cam would prolly pull hard to 6500+ and idk how the stock bottom end would like that even with all the arp hardware .. Which all my rods and pistons are weight matched and the full assembly has been spin balanced so idk it might handle it fine .. Not sure

When I built it I planned on it pulling to 6k as my shift point so it does what I intended it to do but there is still a lot left in it with bolt ons ...

The intake is prolly hurting me right now as it was port matched to the factory lo3 heads which had much larger runners ... So my manifold ports are way bigger than the head ports ... I still trying to decide whether to use a small low rise single plane or go with a performer rpm dual plane ...

But exhaust is gonna give me the most bang for the buck at this point replacing the tiny 1.5" primary shorties wth some 1.75" long tubes and replacing the crush bent bs with mandrel would really wake it up IMO

Right now it pulls really hard from 4k-5500 with everything above I believe I could break 8.00's 1/8th quite easily with 90+ mph traps in 3 gears

1991sleeper

iTrader: (-3)

Parting car out

RS-Chevy-SS

Blew it up?

1991sleeper

iTrader: (-3)

No wrecked car .. I ain't sell in motor ... just suspension interior exterior

1991sleeper

iTrader: (-3)

Thread in classifieds

89Zleeper

iTrader: (1)

So got pics of what u selling

Mr.ChevyStroker

**** man im sorry! That really blows! Are you gonna get another bird?

DynoDave43

iTrader: (11)

Ugh! Sorry to hear that.

1991sleeper

iTrader: (-3)

Ya trying to find a straight roller ta. Formula or gta... as long as it's in decent shape with no body damage that's all that matters cause I have a whole car to swap parts over

1991sleeper

iTrader: (-3)

Well found a roller ! Cheap .... the 91 bird shall b reincarnated as an 88 trans am :-p

Mr.ChevyStroker

Revive it soon!!

1991sleeper

iTrader: (-3)

Prolly b a year lol. It's a clunker been setting for years no motor or trans but body is straight never wrecked

Fast355

iTrader: (2)

I would love to see the next version built with a nice 2,600-2,800 stalled TH350 or 700r4. A properly built auto will give you much better consistancy and help you bring that 60' time and ET down.

1991sleeper

iTrader: (-3)

Lol we will c but I'm thinking more like T56
And a 100 shot

1991sleeper

iTrader: (-3)

I hope it was a TBI car .. even tho I know it prolly wasn't .. how hard is it to swap whole wiring harness ?

1991sleeper

iTrader: (-3)

Going to pick the roller up Fri or Sat have pics of it then ... but I don't expect much for FREE! My dad has seen it and it has a good body needs paint but I have everything on the other car to make it complete ! I'm hoping it has the nice ta hood and tail lights etc still on it I already know it has no motor trans or interior but still has the 16" factory gold lace wheels !! ... hopefully the wiring hasn't been tampered with :-/

Mr.ChevyStroker

if its not a tbi car, and its tpi, that would be a sweet swap, just run the factory stuff for a while, then get a hsr or mini ram and better intake runners, that thing will pulll hard... to 5000 rpm stock... lol

1991sleeper

iTrader: (-3)

The new car has no engine or trans ! The 305 tbi is going in the new roller and it pulls hard to 6k

1991sleeper

iTrader: (-3)

I do know where a whole tpi setup is tho ... how do yall think it would do on "THE" 305 vs tbi or even a Chinese Stealth ram ? Would it b any better or not really ?

ownor

iTrader: (5)

Not too much reason to change to a stock TPI style setup imho.
Wiring shouldn't be hard even if it's different. 88 TA might be MAF if was a TPI car. You can just use your old car's harness or parts of it. Should be no biggie.
Nice to hear you are putting it in another shell T56 sounds good, need a shorter rear tho maybe.

1991sleeper

iTrader: (-3)

I got 4.10 gears

ownor

iTrader: (5)

Heh, in that regard you're good to go then! Did you already beef up that rearend a little?

Mr.ChevyStroker

I was saying if it was tpi itd have the harness to run it so youd have to get the intake and the runners and other little things. Tpi will choke anything down itl get ahold of if its completey stock lol

Fast355

iTrader: (2)

Actualy it won't really choke a 305 unless you are spinning over 6,000 rpm. The stock runners stall out around 350 hp in terms of airflow.

Fast355

iTrader: (2)

Chinese stealth ram is JUNK, get a real one.

1991sleeper

iTrader: (-3)

Yea auburn posi stock 28 spline axles rearend was out of a 92' TA all new bearings seals etc. & disc brakes ! I had drums from factory .. and I have a cheap aluminum rear cover with the supports so it should.l b good ... I think the wink link is the T5 right now that's y I never put sticky tires on it when I went to track always street tires .. think the Lil 305 did pretty good to run 8.5 1/8th on street tires & 2.1-2.2 60's lol and still not tuned quite right

1991sleeper

iTrader: (-3)

Any power gains on a 305 over tbi With good carb intake ?

1991sleeper

iTrader: (-3)

Seriously thinking about a different cam while it's out .. single pattern, 218/218, 112 Lsa , .550 lift , something like that

Cam now is 214/218 114 Lsa .488/.495 lift but I run 1.6 RA so it's .520/.528

ownor

iTrader: (5)

what is your bottom end built to handle rpm wise? but yeah imho can't hurt to step up some in lift tho, duration range may be ok as is depending on power peak and at the given runner volume?
a t56 will probably survive any abuse you could throw at it just fine.. not sure how long that 10 bolt would last with some stickier tires tho

1991sleeper

iTrader: (-3)

Intake runners 175cc and flow like 250-255 cfm at .550 ex flow is somewhere around 190-195 ... bottom end is bone stock with all arp bolts n studs spin balanced and rods pistons weight matched ..king bearings rods resized crank 10/10 speed pro hyper flat tops moly coated rings .040 quench... Idk 6k-6500

1991sleeper

iTrader: (-3)

Fast355

iTrader: (2)

Performer RPM would be a great overall matchup with those ports and RPM limits in mind. The intake ports of the head are only 0.04" wider and 0.07" taller than the performer rpm intake ports.