th425 550hp /600 tq

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Eightballz
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Years Owned: 1970 Olds Toronado GT

Re: th425 550hp /600 tq

Postby Eightballz » Thu Jan 28, 2016 5:54 am

last pics

..dont like how he built the drivers side
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xgecko
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Years Owned: My first Toronado was a 1968 W-34 with the bucket seats and center console... (weeps gently) It was a New England rustbucket in 1982 after less than 14 years. So sad. But it is what infected me and before I knew it I had another '68, a '69, a '70 and eventually inherited a friend's '67 and another friends '73. After buying my brand new Grand Prix in 1988 I retired the last of my Toronados and pulled the 455 I had rebuilt along the way and put it into storage in a friend's barn where it is to this day.
In Mid September of 2010 I happened to see a repeat of the show where Jay Leno did his 66 Toronado and had an instant remission of the disease which resulted in my purchase of a 1969 in very good condition. I am now in the process of fully rehabilitating it and hope to have it on the road in the spring of 2011.
Location: Gig Harbor, WA

Re: th425 550hp /600 tq

Postby xgecko » Thu Jan 28, 2016 10:52 am

Please tell me more about what needs to be done to install those headers. I have been desperately looking for a set as I know the stock exhaust is about as crummy as it can get...

I gather they came from Applied GMC? How much modification, if any, was required to install?
I have my Fuel Injected Toronado. Life is good! 8-)
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Eightballz
Posts: 125
Joined: Mon Sep 27, 2010 2:15 pm
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Years Owned: 1970 Olds Toronado GT

Re: th425 550hp /600 tq

Postby Eightballz » Thu Jan 28, 2016 3:34 pm

these pics are from a 1971 toronado. a guy from classicoldsmobile.com sent them to me.

second picture: on the left passenger side header, right is driver side header. right after welding, before coating.

third picture: headers before modfication. on top passenger side header, below drivers side header.

these headers are the same headers you can purchase via appliedgmc.com or doug thourley for GMC motorhomes. he didnt not told me much about the process but from the pics you can tell he pretty much cut the header passenger side right on the flange and took some material off to make it fit. he also told me that he needs to cut some material out of the inner wheel well on that side. you may run into clearance issues with the A/C hoses comming from the compressor. but that could be solved by installing the 1971 toro type hoses since they came with an angled-type flange.

as for the drivers side...that thing he built cant be right. these headers are meant to be tri-y headers...but he built some sort of..i dont know..frankstein header on the drivers side. the runners are way too short IMO. on the drivers side you need to cut them somewhere after the first Y-collectors and route around the steering shaft..thats the point where it gets tricky, since the 1971 toronado is a bit different when it comes down to exhaust routing in that particular area compared to 1st gen toros.

maybe you could use defroster duct on the engine first to get an impression how you would like to route the pipes.

i already have a set of those headers but need some time and money to get it all done

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xgecko
Posts: 455
Joined: Wed Oct 13, 2010 9:21 pm
TOA Membership Number: 831
Years Owned: My first Toronado was a 1968 W-34 with the bucket seats and center console... (weeps gently) It was a New England rustbucket in 1982 after less than 14 years. So sad. But it is what infected me and before I knew it I had another '68, a '69, a '70 and eventually inherited a friend's '67 and another friends '73. After buying my brand new Grand Prix in 1988 I retired the last of my Toronados and pulled the 455 I had rebuilt along the way and put it into storage in a friend's barn where it is to this day.
In Mid September of 2010 I happened to see a repeat of the show where Jay Leno did his 66 Toronado and had an instant remission of the disease which resulted in my purchase of a 1969 in very good condition. I am now in the process of fully rehabilitating it and hope to have it on the road in the spring of 2011.
Location: Gig Harbor, WA

Re: th425 550hp /600 tq

Postby xgecko » Thu Jan 28, 2016 6:08 pm

Hmm.. I have often wondered if a set of shorty headers might not be a good compromise. I might give it a shot one day, I gather that they have kits to model them and then I can take the model to a shop and have them build me a set with the car there. If I do the initial modelling I should save quite a bit as well as have it done the way I want it done. Not sure if it will work, but it might be worth a shot.

I was hoping you might have had some sort of magical answer that preserved the true header properly while fitting in.

At least I have custom AC that I installed. I have to go take a look again but it might give me an edge although I really did not think of it when I installed it. Hope it has room if I give this a go.

Thanks for all the great pics!
I have my Fuel Injected Toronado. Life is good! 8-)
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bcroe
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Years Owned: 79 Toronado or Eldorado

th425 550hp /600 tq

Postby bcroe » Wed Feb 03, 2016 2:12 pm

xgecko wrote: I do not have the intake or exhaust to allow it to breath properly so I am no doubt limited by that as well. Not to mention I am not running E85 so my 10:1 compression is resulting in detonation at timing advances above roughly 30 degrees. This is robbing me of much power, and my intent is to install Water/Methanol injection this spring to address this and finally see what it is like with full power.


My own experience is, a properly operating fluid injection system will really help the
engine. Keeping it operating despite dirt, temperature, and limited reservoir size
may turn out to be more difficult than first thought. I considered collecting the A/C
drain water to keep from running out. Bruce Roe

Schurkey
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Re: th425 550hp /600 tq

Postby Schurkey » Wed Feb 03, 2016 9:20 pm

bcroe wrote:I considered collecting the A/C drain water to keep from running out.

The evaporator condensate will be chock-full of dust, other particulates, and even algae. Open up an A/C evaporator case, and (around here, at least) it'll be partially-clogged with leaves, pine needles, even mouse nesting material.

Better to install a larger, remote tank filled with tapwater or other purified water and your favorite alcohol/cosolvent mix. Be sure to use enough alcohol to prevent freezing in the winter; assuming the car is being used in freezing weather.

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Eightballz
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Years Owned: 1970 Olds Toronado GT

Re: th425 550hp /600 tq

Postby Eightballz » Tue Jul 11, 2017 7:11 am

hey there,

found something interesting. seems like those guys did a set of headers for a 1966 toronado:

https://www.gbemandrel.com/marman-flanges.html

shorty style headers...would that make a big difference compared to stock manifolds?
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Schurkey
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Re: th425 550hp /600 tq

Postby Schurkey » Tue Jul 11, 2017 11:11 am

Eightballz wrote:hey there,

found something interesting. seems like those guys did a set of headers for a 1966 toronado:

https://www.gbemandrel.com/marman-flanges.html

shorty style headers...would that make a big difference compared to stock manifolds?

Image
The upper photo cannot be for an Olds engine. The exhaust flange is all wrong. The pipes are evenly-spaced, but Olds has the middle pipes siamesed.

User avatar
Eightballz
Posts: 125
Joined: Mon Sep 27, 2010 2:15 pm
TOA Membership Number: 826
Years Owned: 1970 Olds Toronado GT

Re: th425 550hp /600 tq

Postby Eightballz » Tue Jul 11, 2017 11:50 pm

haha you are right...and i also count 5 exhaust ports :lol: :lol: :lol:


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