sigh, T-bird 350 :(

Reply #60 – December 22, 2006, 11:20:06 PM

Quote from: Tbird232ci;119717

There is a problem with following these ratings. Ive seen 3 different sources, showing 3 different horsepower ratings. Some varying as much as 30 horsepower.

Saying the LB9 made 220 horsepower with a 5-speed is BS. My buddy with the LB9 and 5-speed ran 14.30's with all the external bolt ons minus a throttle body, and under drive pulleys, where as a 5.0 mustang can hit those times with a full exhaust, and contrary to most peoples believe, a f-body doesnt weigh much more than a fox body. Theyre geared almost the same, the transmission gearing is very similar, the weight is similar, and if the power was the same, theyd run similar times.

This one says 215hp in the 305 back in 1985
http://www.edmunds.com/insideline/do/Features/articleId=66170?imw=Y
more hp and trq #'s
http://www.geocities.com/mcdamit/engine.htm
here are some 1/4 times on some stock or mildly modded cars
http://www.missouri.edu/~apcb20/drag.html
Here's a good one for a quick reference on 1/4 times
http://www.albeedigital.com/supercoupe/articles/0-60times.html
here's a quote from a random forum:
"Take note that the Iroc and the TA/GTA are able to have the LG4 and L03 engine.. These engines are designed for the RS and the reason why these "top of the line cars", are thought to be slow. The LB9 or Tuned port injected 305 is given a bad reputation because of a certain camshaft used in it. This camshaft is know as the peanut cam. It is the same camshaft grind used to power the 140hp LG4. The TPI 305 when mated to a TH700R4 transmission was given this tastic camshaft. So it only put out around 190hp and usually had 2.7x gears to go along with it. When mated to a Borg Warner T-5 it was given the same camshaft used in the corvette. Bring the horsepower rating up to 220hp. Couple this with the G92 option and you had a 3.45/3.42 rear end with a 9 bolt, a better suspension, an engine oil cooler from the corvette and dual catalytic convertors/dual exhaust and you have a 230hp rated engine pushing around 240 which is the limit of the fuel injectors. Only problem is these cars are hard to find; they were expensive and in Firebird form they weighed close to 4000lbs."

Not trying to fight with ya, I just really had a passion for 3rd gen f-bodys at one point. I actually sold the car in my sig when I was 17 for the '84 Z28 5.0 HO that I mentioned earlier. That was years ago. Obviously I got it back. The Camaro unfortunately is dead. I really loved that car. I wish I had some pics of it that I could post.

sigh, T-bird 350 :(

Reply #61 – December 23, 2006, 01:53:40 AM

Quote

Pull out the HO 302, and bring it out to a 350, with basic bolt ons, yes, the HO will make more power, because it has a much better designed head, and better designed fuel injection, if we're compairing the Tuned Port Injection. The TPI system was better suited for the 305, yet Chevy stuck it on their 350, and even still, it made more power than the 302, more because of head design rather than cubes.

When you get to REAL mods, the 350 shines.

And when you get to your last sentence is where displacement WILL make a difference. Lets talk N/A only (no forced induction)

If one were to take 2 motors that had heads of equal (or as close as possible) flow ratings with similar cams and one was 300 cubic inches and the other 400 (both having an equal number of cylinders, equal compression ratio etc) which one's gonna have more juice?

SIZE MATTERS. Stop living in denial and tell all your girlfriend's and wives you're huge people!:grinno:

Also, show me some torque #'s on those motors as well. *EDIT* found that http://www.phy.duke.edu/~hartley/iroc/iroc_specs.html

Quote

Pull out the HO 302, and bring it out to a 350, with basic bolt ons, yes, the HO will make more power, because it has a much better designed head, and better designed fuel injection, if we're compairing the Tuned Port Injection. The TPI system was better suited for the 305, yet Chevy stuck it on their 350, and even still, it made more power than the 302, more because of head design rather than cubes.

OK 48 more cubes 20 more horse 45 more torque ( not to mention a higher compression ratio ) and better head design is the reason for it having more power than the smaller motor.......I disagree.

Show me a 500 HP 350 and I'll show you a 550 HP 302 and then you'll show mr a 600 HP 350 .......it could go on and on.

And as far as 4 bolt mains.....My buddy's '91 5.0 block from a Town Car has hadover 30 passes and quite a few dyno thrashings to get it at 557 TO THE WHEELS(all motor with a C6 sucking up power).....I'd rather have a 4 bolt, but it's been proven time and time again in a street rod with 450 HP or less, it's not really needed.