I have an 89 RS with a 305 TBI. I was wondering if I could pump out at least 310 hp from modifying the heads, intake, cam, and run a carburetor instead of a TBI.
Could that block produce that much horsepower? If I should just buy a 350, which GM Performance crate engine should it be?

 

the rods and pistons would be the weak point at that HP. They could go flying.

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-Tas
'89 Formula WS-6

305, TBI, 700R4, P.A.W. 14x3 open element with K&N, Milodon 160* thermo, functional Formula hood, cross-flow Flowmaster, '99z28 rear pipes and tips, Hooker 1-5/8" 50 state legal headers, Dynomax 3" I pipe (PN 44063 and 43248)
Super GRK_Taz World
F-Body Dual Exaust
EFI & Intake Options

 

i hate for this to go to one of the infamous "305 vs. 350" debates, but for the money you would spend on getting the 305 to make some power, you can get a 350 that will be a LOT more dependable when you wind her up, and it will have a LOT more potential.

-brian

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1991 Camaro RS
GMPP 350 HO crate engine - Holley TB, MSD ignition, SLP exhaust, everything is new
700R4 - 2,400 stall converter, vette servo, shift kit
My car's webpage - z28boy.cz28.com
President - Central New York F-Body Association
Email - z28boy@twcny.rr.com
AIM - "Z28 Boy"

 

Brian's right. Do cheap mods to the 305 so it won't be a dog while you're saving up for a 350. Or, do what I did- Everything I have purchased for my car I have made sure is for a 350- at this point, all I need to do is swap it in, and it will be able to use all my existing parts. - Randy

 

Z28 Boy,

Where did u buy your engine? The 350 HO cause i was looking for that engine too...
Where can I get the best deal?

Happy Holidays,
lanyabuddy

 

i have a good amount of power(in sig) but i am building up a blown 383 that will at least double the power i have know

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90 RS 305 tbi, 4 3/4" cowl Hood, Edelbrock TES headers, Flowmaster exhaust, Crane roller cam, comp roller rockers, vortec heads/intake, ported tbi, w/new injectors, MSD probillet Distributer/ coil, 1 inch tbi spacer, air foil, 14x4 k&n flat base air cleaner, Rebuilt 700r4 w/ B&M shift kit, B&M Megashifter, 3.23 posi, 2 12 RF's with mtx amp, top of line alpine cd player,autometer phantom gauges, soon to have 91-92 gfx, z-28 wing, new paintjob, rims, all new suspension, and new inteior

 

Another "good" thing is that stuff like headers, ignition, open element air filters, Ultimate TBI mods, and lots of other things will transfer right on to the 350, which is why buying/doing all that stuff first, saves you $$$ when you actually do the engine swap. Plus, it makes driving the car while you have the 305 in it much more fun. The mods I have done to my car have picked up the 1/4 ET a little less than a tenth of second,(15.86 stock - to a best of 14.91 @ 92) but driving the car now can't even be compared to driving it when it was stock. But I have to admit, changing from the 2.73's to 3.42's made a bigger difference than did anything else.

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82 Z28 383, Ported 215cc Dart Iron Eagle Heads 72 cc Comb. Chambers, Comp custom grind Hyd roller cam, Speed Pro .250" domes, Wheeler Motorsports 4340 I beam rods, Eagle 5140 steel crank, Weiand Team G intake, Holley 830 DP, hedman headers
Trans: Turbo 350 w/ 4000 stall -- Rearend 7.5 w/ Richmond 4.10's, Auburn Minispool
Best ET:11.60@ 114.56, w/ a 7.28 1/8 @ 94.20, and a 1.598 60'


89 RS, L03 305, Hypertech Chip, Hedman 1 5/8 shorty headers, w/ Y pipe, cat delete, Dynomax exhaust, K&N open element Filter,160 stat, MSD coil -- Trans:700R4 Corvette Servo -- Rearend: 7.5 GM 3.42 w/ posi-lock

Bassett Racing




[This message has been edited by Basett_Racing (edited December 04, 2001).]

 

what in *** 's name are you talking about? they are the same rods and piston materials that is used in teh whoel chevy production line for years(pre powdered metal rods in LT1's) they are all balanced the same way and built to the same specs. you can easily go to well over 300hp on stock parts with any small block, 305 or 350.
lanyabuddy, i would like to pint out that you can make mroe power with a computer than with a carb. look at any high level of racing that allows both carbs and injection, you will notice all the fastest guys have electronic fuel injection.

later
tim



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91 Camaro RS-LO3,Auto
New Times Coming Soon!
Check Out The East Coast F-Body Nationals Home Page
www.geocities.com/njspeeder
My MAFB.ORG Home Page
www.mycar.net/mafb/registry/detail.cfm?id=299
DSI Racing Home Page
www.geocities.com/foff667

 

I agree with NJ, theyll work fine to nearly 400+ HP. Ive seen it...no B.S.


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91 RS W/carbed 350, Vortec heads, performer rpm, Comp cams Xtreme energy 224/230 duration and .477/.480 lift. BFG Drag radials. 3.42 posi,Corvette servoed 700r4, 3000rpm stall converter. Edelbrock TES, 3inch cat, flowmaster with single 2.5 inch exit.
Best time yet to come
13.0 @ 107- N/A
12.5@ 117- 100HP Nitrous

This is a Pic of my car in race trim www.tbns.net/billyjay/camero.jpg

Yes I know how to spell camaro- so dont ask. I didnt make the link

 

It depends on how the 310hp is gotten. If its for a high reving 305, that's what I was talking about. Sorry I didn't specify.

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-Tas
'89 Formula WS-6

305, TBI, 700R4, P.A.W. 14x3 open element with K&N, Milodon 160* thermo, functional Formula hood, cross-flow Flowmaster, '99z28 rear pipes and tips, Hooker 1-5/8" 50 state legal headers, Dynomax 3" I pipe (PN 44063 and 43248)
Super GRK_Taz World
F-Body Dual Exaust
EFI & Intake Options

 

305s can make power and will rev more than a 350 however the down side is because the 305 has a smaller bore you are stuck with stock heads. 350 heads, even though they will bolt on, have a larger combustion chamber.

No one makes aftermarket heads for the 305 since most people step up to the 350, 400, etc. for race use. You will spend a ton of money porting/polishing the stock heads and never come close to flowing what the aftermarket heads do right out of the box.

Camshafts are interchangeable.

That's why *** invented Nitrous...

Another fun project would also be a turbo 305, hows that for being different.

I heard 305s make great boat anchors...

 

Why is the word "*** " censored on this site, Who would find the word "*** " offensive?! the word is everywhere like "*** Bless America", "One Nation Under *** " and "In *** we Trust". Do a bunch of Communist Atheists own this site or something?! If so it's been fun chatting.

Lets try this again: That's why G.O.D. invented Nitrous.

 

This post is lame

 

I agree Frmula, my lame reference was to the original post just to clarify

 

Hey FRMULA, a few fompanies make heads for a 305 and they are pretty good ones too. You can get Vortec heads from GMPP, there are the popular S/R Tourqers from World Products, and Edelbrock makes a 305 head too. So they are there just more limited in variety.

 

My thoughts exactly.


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91 Camaro RS - Black with red tweed - t-tops - 700 watt sound system - 14x3 open element - 80 Series Flowmaster - muffler turndowns - Poly transmission mount-
I NEED 85-87 IROC WHEELS!

88 TransAm GTA - WS6 - red with grey cloth - K&N Filters - TPIS Airfoil - Wonder Bar - Future Restoration

 

Or maybe it's because most replys use the Lords name in vain and the rest of use don't care for that. Basically it's the opposite of what you just said. Why should his name even need to be discussed on a thirdgen TECH forum? I don't see the connection between religion and cars so let it go. Maybe if people would stop posting crap we wouldn't have this problem. I will however talk to Dirk and ask him what his opinions are on the matter.
I do agree that there are some tight restrictions but live with it. It's just like giving up some privacy and security when going to the airport after 9-11-01...it might be hard at first but get used to it or you'll go crazy.
Now back onto tech:
The cheapest place to get the 330ho motor is probably Jimpace automotive. He sold me the engine for $1950 6 months ago and I think he still has the best prices and shipping costs!
NJSpeeder is right, the stock parts are plenty strong for most na applications. Go to a power adder and you're pushing the limits of the cast pistons...not the crank or rods. Even the cast nod iron cranks are good to just over 700hp in a small block!
Another note: the 305 can not rev higher than an 350 just by design. They both have about the same limit because they share the same stroke = same connecting rod speed! The 305 is a low reving motor. If you took the 350 block and installed a short 3" stroke you would have a HIGH revving 302.
Definatly do all the bolts ons you can to the 305 but I don't recommend spending money on the heads unless you have money to burn OR want to be "special" (crazy in my opinion). Still there is nothing funnier than looking at a guys face after you tell him it's a 305 TBI in an RS thirdgen.
The turbo idea is being kicked around over on the power adder board, go check out the posts about a potential kit in development. It's going to probably be a twin but that would raise the price above a supercharger so it's a toss up right now.

 

"Another note: the 305 can not rev higher than an 350 just by design. They both have about the same limit because they share the same stroke = same connecting rod speed!"

Yes but the 305 has a smaller bore so the total reciprocating mass is less than a 350s since a 305s pistons are smaller. So by design the 305 has a higher rev potential.

 

I find G-O-D offensive.



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No guts, no glory.