badd 455

[Ronfox5818]

my dad had a old full size grand prix, even stock it was a bad ass

[snaproll94e]

Keep up the great work. Check out my 455 GTO, I think you'll like it and it's interesting how similar our engines sound at idle. It seams like all well built Pontiac 455s have a mean, Pro Stock sounding idle.

[puncht37]

@snaproll94e I checked out your vid. Pretty badass. I used to run 62`s on this engine. Now it has 6x`#4`s ported by Dave Bisschop. This motor is old, I mean `80`s old bottom with `96 heads and cam. Iv`e got another 455 on the stand now. HR setup that should be 600`ish hp and torque.

[chevellenut1968]

thanx for the tip

[chevellenut1968]

um yea pontiac POWER!!!!!!!!!!!!!!!!!!!!!!!!!­!!!!!!!!!! i have a question as well i have a casting # 500557 year 76  pontiac 400 with year 67 casting # 143 heads what tips do you sugest

[puncht37]

@chevellenut1968 Just don`t go hog wild on power with that block. Maybe 400-425 hp or so, as that block is a little weaker than the older 400`s. Light rods and pistons will help the block live.

[coutts1993]

sounds like you have a terrible exhaust leak by your header collectors or header flanges. but sweet car man!!!

[reap62]

is that an engine under your hood or do you just have a raging boner?

[bloozelover]

man i used ta have one of these cars same year model to never should have sold it

[Chronicleez]

sounds like a pontiac should. I got a 455 in my 70 gto, so I'll salute you!

[coutts1993]

Great Balls of Fire!!!!

[speedypablo]

pure balls. that's badass.

[Firedogg301]

What cam are you using? I have a Pontiac 455 with an XE-274 Cam and I'm thinking about changing it out.

[pwkid]

whoa i swear at around 1:45 when he revs it you can hear some "thing" screamin hahaha totally hardcore.

[69bigpapa]

hahah thats the carb suckin air but it does sound like a scream

[xmechman93x]

im not hearing any "scream"

[coltimpala]

i think i just had an orgasm :D

[suprbird]

lmao, bet that woke up the neighbors. but boy what i would do for a car like that...hope you enjoy it! now go smoke some civics and supras for me :]

[Outlander11]

GAH! Thake that holley off and put the Q-jet back on!

[lksohm]

Wow that thing sounds mean

I just bought a 455 for my 78 trans am i only hope i can get it to sound like that

[garettisreallycool]

man when you had the four barrles opening it sounded so raw! sounds like it will suck your hand right in!

[bop455]

Hell yeah! I love anything B.O.P and thank goddnes you didnt go the cheap route and put a ch-vy in it but it still sound sweet!

[1967PmdGto]

Sounds like a few 455s I've heard with Ram Air IV cam, or an aftermarket cam with similar radicalness to the IV???? Too bad Pontiac never made a stock full blow Ram Air IV 455 (came out too late-when emis regs were getting bad). The closest thing was the 73/74 SD455--had a cam with a different part number but totally identical specs to the Ram Air III, but it only had like 8.4 compression and a cast iron EGR smogger intake. No where near a full blown Ram Air, but they still ran low 13s stock!

[puncht37]

More radical than a RA4. Comp P296AH-8

[1967PmdGto]

Thanks for info! And that's pretty damn good idle quality considering what you have. That's a great thing about 455s--they can handle a lot of cam.

[1967PmdGto]

What kind of intake do you have? It's kinda hard to tell/see because it's black. But at one point it almost looked like a stock 4bbl unit from around 67-71.

[puncht37]

That`s an Edelbrock Torker 2. I like the sleeper look.

[1967PmdGto]

That's right, I remember that now about that model of intake.... you are right ... total sleeper look, low profile looking, etc. Thanks

[1967PmdGto]

I greatly appreciate the info, and just one more question for you I should have asked first because it's my biggest curiosity. -- What RPM do you shift her at for the best acceleration??? I have a 455 in a GP that's decently built (not as cammed as yours, my cam is only slightly more than the HO 068 cam). It truly felt quicker than hell when shifting at 5700/5800. But then the stopwatch revealed it was exactly as quick as 5200rpm--so I now shift at 5200rpm.

[puncht37]

I shift at 5600. But, it`s too low for that cam. That cam will go to about 6500 but i have stock rods and i won`t turn it that high. Guess you can say it`s over cammed. That is until i build another one of my 3 455`s.

[1967PmdGto]

Even after 30 years, it still amazes me how much power these engines make at such a low/usable RPM, others need revving to oblivion to equal your power at only 5600. Your quick blast to 120mph---It did not seem to be revving high at all, but made tons of power---acceleration did not fall off one bit at high speeds--equal acceleration all the way thru. & your gears seem pretty tall--55mph in Low. The cam you mentioned--I definitely noticed it in the rear/exhaust (duh) part of vid.

[ghana21]

@puncht37 i just got a 87 Cutlass with the 307, what do u recommend that i can get 2 beef up my sleeper, how is a 403?

[puncht37]

@ghana21 You`re better off with an Olds 350 as the block is stronger than the 403.

Try and find a `74 and older block and `70 and older heads as this will get the compression up to around 9.5 to 10 to 1 as compared to 8 to 8.5 on the `71 and up 350`s.

[ghana21]

@puncht37 I appreciate it sir

[1967PmdGto]

I'll never forget. About 10-15 few years back "HPP mag" had a guy with a stock 71 Lemans T-37 455HO th400auto. He had normal gears-- either 3.23 or 3.08, can't remember. Well anyway, all he did was "supertune" (jetted the q-jet for the max power, put adjustable locknuts on the rocker arms for perfect valve adjust, curved the distributor--it actually still had the stock breaker point ign!) it and used fatter tires. It was running high 12s! Daily driver! PONTIACs RULE!

[dapsapsrp]

Nice old Poncho motor. T-37. Now thats a car you don't see everyday even back in 1971.

[Racter125]

Man this thing gave me an ear to ear grin and the chills. Fuckin' BA

[chieffatnutz]

You make me miss my 455 pontiac! Whats that bad boy run?

[puncht37]

Last time out was 12.21. But that was with a different carb. than the one in the vid. I`ll get it down into the 11,s with tuning. This is through the mufflers.

[olds33]

Nice car! Maybe if you get a chance, you can do an in-dash video of the car cruising.

[puncht37]

I did do a speedo vid. "Quick blast to 120"

I`ll have to get help the next time. Driving a 500

horse car with 1 hand is nerve wracking.

[girlongirl6385]

what car is that?

[puncht37]

It`s a 1971 Pontiac LeMans T-37. Little brother to the GTO.