I ask him how fast it is and he told me he never ran it at a track but should run 12's.

 

Michigan is still that way. (I think that's just about the only good thing about living in this state right now.)

 

Believe it or not, here in good ol' OKiehoma we don't have emissions tests. They did away with them about 5 or so years ago.

 

you got me, I really meant GTOs

I dont know my pontiac history

 

No, your correct. There were RA4 Firebirds.

 

Personally, I love that car. Somethin about the wheels/paint scheme/shaker combo that just works for me. Plus the fact that it has a true Poncho motor makes me skeet.

 

What a wasted effort.....I guarantee that car is slower than a stock LS1 and gets 10 mpg.

 

maybe he wanted to be original? how do you know its slower than a stock LS1? these engines are NOT TURDS. my uncle had a heavy *** 4200 lb grand prix with a mild 400 that ran 14 flats. this guy has more done and weighs less.

I have a 1968 bonneville with a pontiac 400. its a great car to drive (before it rusted.) I would get 15 mpg on the highway and 12 city. thats pulling 4500+ lbs of car around.

get your facts straight. the LS1 is an outstanding engine but that does not mean other engines can not be.

 

But he says its fast, and you need to be an experienced muscle car driver. lol. and i'm sure i could beat it stock. heh.


MRAMAY, in respone to the OBDII issue. If you leave the pcm intact and delete all the codes, it'll show up as a pass at an OBDII test station

If the state requires a visual safety inspection you might be fubar unless you know people

 

want to hear a secret? There were fast cars BEFORE the ls1. shhhhhhhh, dont tell anyone.

 

*covers ears yells LALALALALLALALALA I CAN'T HEAR YOU!!!!* j/k.

Oh I know but even from other SBCs built ups i've seen I myself have not seen a really hot 400, not to say they arn't out there and I bet some people have ones that could go faster then I'd ever dream but I just havn't seen any build ups on them.

I'm all for custom fab work and I like all cool built ups, in this case I'd like to hear why he chose this not rudly but I'd like to know.

 

Production stopped during the late 70's, and the prices for today's aftermarket Poncho engine's is completely ludicrous. This is why you don't see too many magazine build-ups on them, let alone build-ups from us enthusiast's...

I've seen naturally aspirated 400 Pontiac engine's propel two ton Catalina's to eleven second passes, without even breaking a sweat. Did I also mention without slicks? Without slicks.

 

Here's a popular second gen site. Scott has really done a nice job on the car.

http://www.pontiacs.org/modules.php?name=70bird

455 bored .060 over (now 468cid) 12.34 @ 108.26 1.71

 

OOh I think I struck a nerve here...

My uncle flies a spaceship...

12mpg is a couple wot runs from from 10mpg.

The LS1 is a pretty decent engine with good heads, there's a few things about LS1's that suck (lets talk oiling...)

According to the ad it has #16 heads and a ram air IV cam, 800 q-jet, maybe headers, blah blah, just scraps from the PAW catalog. If we ASSume it makes anywhere near the RA IV's 370hp at the crank, through a through a turbo 400@15% driveline loss= ~315 whp. **** thats pretty close to an M6 LS1 if you like to dyno race. Plus the added weight of the iron block and heads, which you know what they weigh. Drivers race.

If he says it runs 12's maybe it will but it probably won't. And show me where I said old Pontiac engines suck?? Old Pontiac engines just belong in old Pontiacs.

 

gorgeous car /\

 

That 70 is really nice, and exactly what i'm talking about, old car, old technology.
I would roll that in a second, but it illustrates my point, a 468 cube motor and it only traps 108 mph?? bolt on ls1's do that.

 

There's more to it then horsepower. The LS1 runs 13.3@108, while Scott's car runs a full second faster at the same mph.

He has a vid of it somewhere on his site. I'll try to find it later.

 

Oh, I understand...a 468 has more, LOTS more torque than an LS1, which obviously means it can accelerate the car faster(= quicker ET)It better, because it has over 100 more CI than an LS1... comparing the milder 400 to an LS1 is a much closer comparison.

Maybe I put my foot in my mouth (a little) when I said It could get taken out by a stock LS1, but cubic inch for inch as both cars sit I don't think the performance difference is that great, maybe Brains' guess is a little closer than mine. Driveability and style wise, I guess that is just (my)opinion.

 

The 400 will also brutalize the LS1 in torque. As far as peak horsepower, it comes down to the heads - and short of the roundports (RA2, RA4, 455 H.O., 455 SD) the old Pontiac heads don't flow with the LS1's; About 20-25 CFM short in stock form, and cubes don't make power, airflow does. That said, with a well tuned and though out combo, you can make 400HP out of a 400 without touching the heads. Lets also not forget most of the cars the old Pontiac wills be running in are VASTLY heavier and aerodynamically challenged compared to a 4th gen Bird which definetly handicaps them with trap speeds.

That old 400 can run hard, and they routinely do. Theres quite a few Pontiac/3rd gen swaps out there and they run considerably harder than they do in a heavy, aerodynamic brick of an older car. I know, my mom used one for a daily driver for years. I've been around Pontiacs my entire life and just yanked my old 400 for an LS1, I do not underestimate them.

 

interesting swap, im just wondering what he put the ls1 into once he pulled it, this car is probably whats left after he took the 400 out of his old firebird and installed the ls1, im guessing this was a parts car that he reassembled. if it puts up the numbers its worth the time spent doing it, it will definately raise some eyebrows at any car show.