Just did something silly or some might say dumb or what ever. Just bought a small block STR12 cross ram intake. I have a 408 that im going to put in the barracuda. Just thought that would look awesome & if it works as good as the big block one my dad had its another plus. I have heard good things & bad things about them. Like you can run them on the street. They are an all out race intake. Well im going to find out. Just have to locate linkage. As soon as I get it I will post some pictures.
DID SOMETHING SILLY STR12 INTAKE LOL
- Thread starter cawley
- Start date
-
It's all in how it's set up and tuned. It can work well either way.
If your creative, you can tab your own linkage.
Keep us posted! I just MASHED the jealous button!
chrgdrt
Well-Known Member
I'm so jealous! keep us posted
Was that the one on ebay? There were some linkages on ebay just for the STR-12, but they're sold out for now. $189.00 ! I've been waiting to see if he sells more. Mine has the linkage and adapter plates for mounting Holley's sideway's. At least that's what Edelbrock tech told me after I sent them this pic.
vitamindart
Well-Known Member
those look so Cool!
It's been said many times "Yes you can.No you can't" It all depends on your combination. Cam, compression, carbs,etc.
I ran this cross ram on my 472 Hemi car. Would idle all day,good throttle response,part throttle driving in traffic just like any car with a carb.
There is one drawback... You just can't keep yourself from smashing the accelerator to the floor !
I ran this cross ram on my 472 Hemi car. Would idle all day,good throttle response,part throttle driving in traffic just like any car with a carb.
There is one drawback... You just can't keep yourself from smashing the accelerator to the floor !
yellow rose
Overnight Sensation
It's a very good street/strip intake manifold.
It's biggest issue is the carbs are so close to the floor of the manifold.
The last one I did we made a 1 inch spacer to go between the base and the top. It made a difference not only in power but tuning. It took less jet to make the same power.
If you have a company local to you that can water jet materiel, take them a gasket and have them make a 1 inch spacer. If you have the room to close the hood.
The other thing is do NOT undercarb the engine. We used two 650 carbs and they were too small. We should have used 750's but the customer was on the web and all the keyboard gurus told him 750's were too big, but I doubt any of them ever ran any 2x4 anything in their lives.
It's biggest issue is the carbs are so close to the floor of the manifold.
The last one I did we made a 1 inch spacer to go between the base and the top. It made a difference not only in power but tuning. It took less jet to make the same power.
If you have a company local to you that can water jet materiel, take them a gasket and have them make a 1 inch spacer. If you have the room to close the hood.
The other thing is do NOT undercarb the engine. We used two 650 carbs and they were too small. We should have used 750's but the customer was on the web and all the keyboard gurus told him 750's were too big, but I doubt any of them ever ran any 2x4 anything in their lives.
replicaracer43
Grumpy Old Man
- Joined
- Oct 10, 2008
- Messages
- 6,051
- Reaction score
- 7,867
I have one a 410" smallblock with fitec duel 4 fuel injection. There is a thread on it somewhere, dont know how to put a link. Runs AWSOME
diymirage
HP@idle > hondaHP@redline
I believe that many people who under carbed them did so because of the Edelbrock recommendation also. I have an email from a tech guy who's been with Edelbrock for 30 some years and told me which carbs were recommended. See below:
Congratulations on having an intake manifold that has never been used and is at minimum 45+ years old.
Back in the day, when this intake manifold was new Edelbrock suggested to use 2-600 or 2-650 cfm Carburetors.
The RPM Range of the STR-12 S/B Chrysler is 3,500-6,500 RPM range, as determined by the Edelbrock Equipment Co. back in the day when they were new.
Sorry to inform you that even after my attempt to look for old literature I came up empty. I have Copied & Pasted the General Installation Instructions for the S/B Chrysler.
This will at least show you the intake manifold torque sequence for you to install this new intake manifold. If I do come across any of the old literature I will get a hold of you.
Sincerely,
Smitty Smith
Technical Sales Coordinator
Here is another one from him:
Back in the day, Edelbrock suggested Holley Carburetors on this STR-12…
Remember I said 2-600’s, they were Holley 4776 , and the 650’s were the 4777 Holley Carbs used and recommended by Edelbrock.
But the Holley’s used on the STR intakes were facing forward, not sideways George.
replicaracer43
Grumpy Old Man
- Joined
- Oct 10, 2008
- Messages
- 6,051
- Reaction score
- 7,867
That's it, thanks!
yellow rose
Overnight Sensation
I'll say this, and take it for what it's worth...the guy giving you advice has probably never had his hands on one, let alone worked with it.
You can do what you want, but Edelbrock was wrong then and is wrong now.
Two 750's (it's well known here that I won't use anything with the Holley name on it but you can use a ProForm 750 and have something you can tune and FWIW you do NOT want carbs with a choke on them and you need something that has 4 corner idle) is what you need.
Edelbrock is in the same boat as Holley. They've been doing it wrong for so long they think they are correct.
If you can find an early 1980's Offenhauser catalog there is a good explanation of dual carb application sizing. And it's not what everyone says.
Here on the net.... http://offenhauser.co/wp-content/uploads/2018/04/Offenhauser-Catalog-1987.pdf
I'm not disputing your findings, I'm just saying what Edelbrock themselves recommended and I'm sure that's all he was conveying. We know edelbrock had some fuel puddling issues which led to cracked top plates from a mini explosion. .
I actually made contact with Offenhauser to see if a 340 crossram would be something that they might contemplate. I got the same answer from them that I got from AMD when I offered them my NOS '69 front fenders to copy....crickets.
yellow rose
Overnight Sensation
I think that's the catalog I have, but it doesn't have the notes I was talking about.
I'll see if I can find mine.
Well, from all of my reading and a drawing that I have somewhere, there were "internal fixes" of the bottom plate internally. This is where a small amount of "welding" at one end is supposed to prevent the fuel puddling from initial cold starting which resulted in the pressure that cracked many top plates. Probably as yellowrose stated that they placed a 1'' spacer between the two plates and this may help prevent the initial fuel dropping down out of the mixture and accumulating. I'm not the expert on this but was always annoyed that you never heard of this problem on the cross rams found on other small blocks, specifically the one for the Z-28 which has quite a lot written about it's use.
@A56
Sorry, you are annoyed at me for not knowing?
Oh that’s a good one that can’t be true! LMAO
Sorry, never stated I ever owned a cross ram.
Fuel puddling can happen on any intake but I now get this is for a specific intake where as I read/thought I understood it as the carb itself. Whoooops!
The clutch pack in my brain must be slipping....
Anyways, now I get it. Thank you.
Z-28’s are at best nice to look at -
I did flip a ‘79 Berlinetta once after a few fixes and minor body work. Made back 4 times the money invested. Totally a killer deal. I wouldn’t mind owning one again for at least enough time to get to know it some.
Sorry, you are annoyed at me for not knowing?
Oh that’s a good one that can’t be true! LMAO
Sorry, never stated I ever owned a cross ram.
Fuel puddling can happen on any intake but I now get this is for a specific intake where as I read/thought I understood it as the carb itself. Whoooops!
The clutch pack in my brain must be slipping....
Anyways, now I get it. Thank you.
Z-28’s are at best nice to look at -
I did flip a ‘79 Berlinetta once after a few fixes and minor body work. Made back 4 times the money invested. Totally a killer deal. I wouldn’t mind owning one again for at least enough time to get to know it some.
-
