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Pontiac V8 Swaps

Old 06-04-2005, 01:38 AM
  #51  
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really quick... i was fittin my new valve covers and they dont fit because of this baffel type thing that bolts inbetween the rocker sets and i assume in there to sheild the oil spray from the push rods. anyway what im gettin at is, are they nessicary(sp?)? the covers fit SO nice, but i have to take the baffel thing off.
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Old 06-04-2005, 10:13 AM
  #52  
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yes and no. your car will run without them, but the rockers WILL spray oil up your pcv valve and breather without them.
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Old 06-20-2005, 10:46 PM
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From hedman sight: some block hugger hedders

PONTIAC

Application Street Rod

Engine 326-455

Painted Hedder Part# 28164

HTC Hedder Part# 26164

Elite Hedder Part# --

Repl. Gasket 27600

Hedman Turbo Muffler --


Tube & Collector 1 5/8-1 3/4", 3"


Footnotes 15 Shortie style hedder. Maximum ground clearance.
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Old 06-20-2005, 11:30 PM
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Originally posted by Project: 85 2.8 bird
From hedman sight: some block hugger hedders

PONTIAC

Application Street Rod

Engine 326-455

Painted Hedder Part# 28164

HTC Hedder Part# 26164

Elite Hedder Part# --

Repl. Gasket 27600

Hedman Turbo Muffler --


Tube & Collector 1 5/8-1 3/4", 3"


Footnotes 15 Shortie style hedder. Maximum ground clearance.
somebody buy these and let us know if they will work!!!!!!
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Old 06-21-2005, 12:03 AM
  #55  
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you can also use stock exhaust manifolds.. some pontiac manifolds work MUCH bettewr than some shorty style headers. with the exception of weight, of course..

Most people want long tube headers. and if you plan to use subframe connectors, long tubes are definitly the way to go.
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Old 07-07-2005, 01:42 PM
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RamAirRestoration.com
i found this guy. and talked to him about the pontiac power plant in a third gen. he said hes seen it done and they used these factory headers: click

now, the problem i see is for $420 i dont think its worth it. i mean yeah theyre nice and all, but when i can spend another
$100 or so and get those indian adventure long tubes....why wouldnt i?
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Old 07-07-2005, 04:35 PM
  #57  
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nooo way

Unless you have EXTREMELY rare round port exhaust heads wich were pretty much SD 455 heads or Ram Air III and up heads, that's WAY overkill. and if you DO have round port heads, sell them on ebay and buy a complete 455 with the money. There are pleeeenty of factory exhaust manifolds that flow extremely well.. in ALOT of cases, the cast iron manifolds flow even better than shorty style headers. You need to look for "D" port style manifolds or headers. Modifying some full size car pontiac headers is not a big deal. Just make a small "Y" pipe after the trans pan into a 3 or 4" factory style exhaust. As i've said a 1000 times, there's links in this thread that go to pictures of the whole thing completely done step by step. For info on manifolds you can check out "www.performanceyears.com" and search them out or just ask the question. Or do a search for "3rd gen 455" or something like that and you'll get ALOT of info...
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Old 07-08-2005, 06:02 AM
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Re: nooo way

Originally posted by swimster
Unless you have EXTREMELY rare round port exhaust heads wich were pretty much SD 455 heads or Ram Air III and up heads, that's WAY overkill. and if you DO have round port heads, sell them on ebay and buy a complete 455 with the money. There are pleeeenty of factory exhaust manifolds that flow extremely well.. in ALOT of cases, the cast iron manifolds flow even better than shorty style headers. You need to look for "D" port style manifolds or headers. Modifying some full size car pontiac headers is not a big deal. Just make a small "Y" pipe after the trans pan into a 3 or 4" factory style exhaust. As i've said a 1000 times, there's links in this thread that go to pictures of the whole thing completely done step by step. For info on manifolds you can check out "www.performanceyears.com" and search them out or just ask the question. Or do a search for "3rd gen 455" or something like that and you'll get ALOT of info...
he has them in D-port too. same price tho!
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Old 08-28-2005, 07:58 PM
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455

im mounting the tune port on my 72 455 pontiac mtr for my 3rd gen t/a.. any suggestions what injectors i should use??
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Old 08-28-2005, 11:28 PM
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Re: 455

Originally posted by plathegame
im mounting the tune port on my 72 455 pontiac mtr for my 3rd gen t/a.. any suggestions what injectors i should use??
first i must ask what exhaust your using! LOL
and how your putting a tpi on a pontiac block?? but if it all works out i would say 30lbers for a close to stock motor, and 42s for a mildly built one.
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Old 08-28-2005, 11:47 PM
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tpi

the tpi can be mounted on a torker II intake w some milling work.. you just have to be careful when you drill the holes for the injectors that you dont egg them..

i have a set of long branch 66 tri power motor factory headers i was going to try but im not sure if they will fit yet i still havent taken them off my 66 grand prix
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Old 08-29-2005, 03:09 PM
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Re: tpi

Originally posted by plathegame
i have a set of long branch 66 tri power motor factory headers i was going to try but im not sure if they will fit yet i still havent taken them off my 66 grand prix
the long branch wont work. the factory k-member is in the way. however if you have some ram-air III factory headers, they will work. but i think if im gonna spend that much money, i might as well spend the extra 100 and get the swap long tubes from IA.
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Old 08-29-2005, 09:11 PM
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pont

thanks for the info.. i figured since i have to take the mtr out of my gp i would try 1 of the headers to see if they would fit before i bought another set. you saved me some extra work.. i have a set of ram air III heads but no headers unfortunately
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Old 09-12-2005, 11:44 AM
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the tpi can be mounted on a torker II intake w some milling work..
Can you expand on this. I am researching a TPI solution for Pontiac motors. I am in the process of setting up a motor for my 89 GTA.
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Old 10-03-2005, 12:26 AM
  #65  
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I've mentioned them in other Poncho swap posts, but Rance,

http://www.rancefi.com/ManifoldsforSale/pontiac4.htm

and

http://www.rancefi.com/ManifoldsforSale/pontiact.htm

makes some interesting conversions.
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Old 10-03-2005, 12:40 AM
  #66  
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well guys, im actually almost done with my swap. all i got left is fitment of my indian adventures headers, then im sending them off to be coated.. installation on my spohn th-400 swap crossmember and torque arm, and some misc. wiring. if you guys have any questions feel free. ill do my best to take as many pics as i can this next week.
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Old 10-03-2005, 12:56 AM
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any thermal coatings on the pistons, head cc, or valve faces?
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Old 10-03-2005, 01:03 AM
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Originally posted by Project: 85 2.8 bird
any thermal coatings on the pistons, head cc, or valve faces?
no, i have aluminum pistons. and i didnt coat anything else. only thing that will be coated are the headers.
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Old 10-03-2005, 08:56 AM
  #69  
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hood clearance? What's it like? Can you run a tall intake under a firebird hood? What intake/car/air filter you running and how does that clear?

Can you take a pic of the installed engine with intake/carb/cleaner?
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Old 10-03-2005, 02:33 PM
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Originally posted by [email protected]
hood clearance? What's it like? Can you run a tall intake under a firebird hood? What intake/car/air filter you running and how does that clear?

Can you take a pic of the installed engine with intake/carb/cleaner?
hahah, hood clearance! good joke. no im kidding, if you ran a low-rise intake and a airfilter with a drop base, you MIGHT be able to get it to clear the stock hood.

i however didnt realize this untill i had bought all the **** for the build. i have indian adventure motor mounts which you still have about a good 1" inbetween the bottom of the oil pan and the k-member. on the motor i have a edlebrock torkerII, thats a single plane- highrise. and toping it of i have a proform 750cfm. im pretty sure its the same size as a standard holley carb, but its got a billet aluminum throttle plate, and billet aluminum metering blocks. and then just a off-the-shelf 14" round airfilter(i think its a 2" or 2.5" tall filter, not a drop base). ive put a peice of wood across the tops of the fenders, and the whole filter assembally is above that line.

but thats ok, im thinking about trying to make a shaker hoodscoop....or somehow graft one from a 2nd gen onto my car. ive also thought of puting a nostalgia SuperDuty scoop on. like this one:

and i dont work but one day this week, so ill try to borrow a camara to take some quick shots.
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Old 10-03-2005, 10:02 PM
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.

that is a nice old school pontiac

i will post more about the torker II tpi set up as soon as i can find the plans i made. i just moved recently and i cant find where i put them
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Old 10-03-2005, 11:52 PM
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FYI, i got the indian adventure headers today!! damn, there nice. some real quaility products!
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Old 10-04-2005, 08:30 PM
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engine 1


engine 2


engine 3


engine 4


hood clearance


indian adventure swap motor mounts(pass. side)


"Full Frontal"


and a quick side shot of as much of the car as i could get in my little 2-bay garage.
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Old 10-04-2005, 08:36 PM
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oh, and i tryed fitting the headers today after school...

well its true, nothing that has to do with custom work is ever a direct bolt-in. the stock k-member is in the way of clearing primary tube #3 and tube #4. if they were tucked up about another 1/4 - 1/2 of a inch closer to the heads, i think it would work...

so now im at this crossroad, do i call up IA and ask them about the clearance problems, or do i try beating my k-member to make them clear? i really dont want to take a ball-peen to the headers.
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Old 10-04-2005, 10:30 PM
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I'd mod the k-member if it were mine; dent it if the problem is minor, or cut and rebox a section if thats not enough.
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Old 10-05-2005, 12:11 AM
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Originally posted by LT1guy
I'd mod the k-member if it were mine; dent it if the problem is minor, or cut and rebox a section if thats not enough.
thats exactly what i was planing on doing. and i dont want to deal with cutting/reboxing. i mean it prolly only needs like a 2" long dent about 3/8" down. i think i can pull that off. but i really would rather not pull the motor/trans out. so i have to figure somthing out.
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Old 10-28-2005, 07:20 PM
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I'm going to be putting a 389 into my 1984 S/E Firebird over the winter here. Right now I'm rebuilding it. Basically just adding myself to this thread so I can get updates emailed to me. I'll post my progress as I go.
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Old 10-31-2005, 03:34 PM
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would a tubular k-member provide enough clearance?
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Old 10-31-2005, 07:10 PM
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Originally posted by Project: 85 2.8 bird
would a tubular k-member provide enough clearance?
Yes, that is what I am going to do on my 87...probably an AJE, or ,maybe a Spohn if they are available in time.
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Old 11-20-2005, 11:38 PM
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I'm getting ready to do this swap. Have a free, running 68 360HP GTO motor. came out of our boat. Lots of good info in this thread. Sorry if i missed it, but one thing i havent seen mentioned is the front springs. What affect does the pontiac engine have on to stock springs/ride height, And what options do i have? This is going in a 92, and the front bumper/air dam already drags going in and out of some driveways.
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Old 11-27-2005, 10:40 PM
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I swapped my 70 455 and 77 th350 in my 85 iroc for around 500$ in parts. i had a custom 3" drive shaft made. wiring was simple. torque arm from jeggs. and i was on. i had to use a 4" cowl hood which i don't like very much. but it's better than the alternative. i had purchased the I.A. headers and they didn't fit .. so i sent them back and opted for a set of, what i am told, are pre 70's GTO exhaust manifolds. there is no power loss compared to the old crappy hedman headers i had on it when it was in a 77 t/a. all in all, it was a very easy swap and one hell of a light to light screamer.
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Old 11-28-2005, 12:52 AM
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Originally posted by Kross4031
I swapped my 70 455 and 77 th350 in my 85 iroc for around 500$ in parts. i had a custom 3" drive shaft made. wiring was simple. torque arm from jeggs. and i was on. i had to use a 4" cowl hood which i don't like very much. but it's better than the alternative. i had purchased the I.A. headers and they didn't fit .. so i sent them back and opted for a set of, what i am told, are pre 70's GTO exhaust manifolds. there is no power loss compared to the old crappy hedman headers i had on it when it was in a 77 t/a. all in all, it was a very easy swap and one hell of a light to light screamer.
wow... just wondering, where didnt the IA headers fit? i just sent mine back, and im currently in contact with them to fix the fitment problem.

what kind of exhaust manifolds did you end up using? are they ram air III's? what did you do for the rest of the exhaust?
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Old 11-28-2005, 07:50 AM
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i believe they are ram air III's but i know very little about pontiac. the casting # on one of the manifolds are 977c42-rh2b f. i am sure someone out there knows exactly what that is. lol. i went a few rounds with one of the guys at I.A. about the headers and he assured me that they were made correct and they fit his "jig" that they supposedly make them on and there is no reason that it shouldn't fit my application. i had enough of that and had them refund my money. over 500$ is way too much money for headers that are not coated and do not fit. as far as exhaust. well, that was some ugly home made side pipes. the car i put in into was not a very good car. i had some pics of it on here a while ago in another forum. i'll see if i cant find it and post the link to it. anywho, it was just a car for me to get everything i needed to make it perfect for the next car. which i happened to find last week.

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Old 11-28-2005, 08:14 AM
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the old thread is gone.. here is a pic of the old car. i'll have some of the new car shortly.
Attached Thumbnails Pontiac V8 Swaps-picture-002.jpg  
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Old 12-01-2005, 09:52 PM
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just got the new ride home ... here is a couple of pics, just cause.
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Old 12-01-2005, 09:53 PM
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another.
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Old 12-01-2005, 09:55 PM
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i'll be happy to let anyone know exactly what i did to achieve my 455 swap.
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Old 12-01-2005, 11:41 PM
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how do those ram air III manifolds breath? ya think its pointless to use those vs. headers?
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Old 12-02-2005, 12:01 AM
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i dont think it's pointles to use manifolds vs. headers. obviously headers would be a better way to go if you can find someone to make a good set of equal length headers that FIT! but as i said .. in comparison to the crappy hedmen headers that i had on it. the manifolds provided no gain or loss in horse power. but, with a good set of headers, it would be safe to say that headers would be the way to go. it just this combination is what is working for me.

Last edited by Kross4031; 12-02-2005 at 03:09 AM.
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Old 12-02-2005, 12:16 AM
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if ya wouldnt mind me asking, what kind of times are you turning with your currnet setup?
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Old 12-02-2005, 02:52 AM
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i haven't had the old car at the track. taking it to the drag strip never really appealed to me. an example of how quick it is... i raced a 03' vette from a 40 mph roll and pulled it by two car lengths from the start and kept on pulling away up to 120mph. obviously he would have past me by had i kept going .. top end really is not it's strong point. i never took it past 130 although it seemed to have more in it. from a stop .. the thing would never hook up. it still spun the tires from a 40 mph roll, very little, but it still spun em.



one set of headers i am considering are the shorty headers from hedman. they look like they might work. but i am not ready to throw down the cash for "might work". http://www.carcraft.com/techarticles...nt/index3.html

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Old 12-02-2005, 08:00 AM
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it turns out i was way off on that casting number. it is 9777642 - rh2b. as far i can tell they are ram air's and came off of a 67-68 HO 400 GTO. but that is just what i am finding on the net.

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Old 12-03-2005, 07:26 PM
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Originally posted by [email protected]Can you expand on this. I am researching a TPI solution for Pontiac motors. I am in the process of setting up a motor for my 89 GTA.
You might want to research that old concept known as the "ZR2" (89 Corvette, with a 454 Big Block). They took a "Tunnel Ram" intake manifold (find one for the Poncho), fabricated their injector bosses, adapted a Weiand Plenum (pretty much an early 90's concept of the HSR).

I have about five old magazines saved that embellish on this build... as I always kept them just in case I decided to run TPI on my 454 one day (while fooling those who are not in the know)....

Last edited by Street Lethal; 12-03-2005 at 07:30 PM.
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Old 12-05-2005, 11:04 AM
  #94  
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Car: 89 GTA, 89 Formula
Engine: L98, LB9
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one set of headers i am considering are the shorty headers from hedman. they look like they might work. but i am not ready to throw down the cash for "might work".
High Performance Pontiac magazine did a engine-dyno shootout about a year ago I think comparing (going by memory here, so...) factory-style RA manifolds, RA Resto 2.5" manifolds, shorties, and long tubes. Of course, the long tubes were king, but I believe that the 2.5" RA manifolds came in second beating out the shorties. If you haven't seen the article, I probably have that issue stashed somewhere.
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Old 12-05-2005, 10:02 PM
  #95  
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Car: 91 Firebird
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Pontiac 400 with 4th Gen T-56 into 3rd Gen

I am trying to do my research for a Pontiac 400 swap into my 91 Bird. I really would like to mate a 6 speed to it, an aftermarket T-56 is not totally out of the question, but a used 4th gen T-56 is preferable due to the cheaper price. I need any suggestions on what bellhousing to use for this swap. Also what would be better to install an LT1 T-56 or an LS1 T-56 as far as the linkage is concerned. Any help is greatly appreciated.
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Old 12-06-2005, 12:11 AM
  #96  
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Re: Pontiac 400 with 4th Gen T-56 into 3rd Gen

Originally posted by kylebowditch
I am trying to do my research for a Pontiac 400 swap into my 91 Bird. I really would like to mate a 6 speed to it, an aftermarket T-56 is not totally out of the question, but a used 4th gen T-56 is preferable due to the cheaper price. I need any suggestions on what bellhousing to use for this swap. Also what would be better to install an LT1 T-56 or an LS1 T-56 as far as the linkage is concerned. Any help is greatly appreciated.
http://www.jegs.com/webapp/wcs/store...tegoryId=15519

my dad is doing a similar swap in his GTO. hes using this bellhouseing and a LT1 T56. only thing is, youd have to use some hydrolic cluth assembally, from which car, i dont know.
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Old 12-06-2005, 12:18 AM
  #97  
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Car: 86 IROC
Engine: Pontiac 455
Transmission: TH350
Originally posted by LimaBravoNiner
High Performance Pontiac magazine did a engine-dyno shootout about a year ago I think comparing (going by memory here, so...) factory-style RA manifolds, RA Resto 2.5" manifolds, shorties, and long tubes. Of course, the long tubes were king, but I believe that the 2.5" RA manifolds came in second beating out the shorties. If you haven't seen the article, I probably have that issue stashed somewhere.
yeah.. that's pretty much why i am not in any hurry to replace them just yet.
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Old 12-21-2005, 07:09 AM
  #98  
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www.chiefmanyhorses.com makes both the motor mount kits and headers for the Pontiac engine to be installed in a Third Gen car.
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Old 12-21-2005, 10:22 AM
  #99  
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already bought the headers from them and had to send them back because they wouldn't fit. someone else that has posted here has the same issue.
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Old 12-21-2005, 11:41 AM
  #100  
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Car: '92 Firebird
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yeah, that was me. i sent back my first set, and they said they found someing wrong. so they sent me out a second set, and im having the same problem.

i think im gonna return them and just get the ram air restorations' oversized RA3 manifolds.
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