Converters- Random Tech Vs. Dynatech
Thread Starter
Burning Brakes
Joined: Aug 2000
Posts: 952
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From: Morgantown,WV USA
Converters- Random Tech Vs. Dynatech
Anyone have any info on which cat has better flow numbers and performance?
I am looking at the Random Tech High Flow Metallic Converter # 703000
and the Dynatech "Power Cats".
The RT cats are much more expensive- which makes me wonder about the Dynatechs.
They will be going on my 91 ZR1 that currently has full length Watson headers & Corsa exhaust.
Thanks,
Dan
I am looking at the Random Tech High Flow Metallic Converter # 703000
and the Dynatech "Power Cats".
The RT cats are much more expensive- which makes me wonder about the Dynatechs.
They will be going on my 91 ZR1 that currently has full length Watson headers & Corsa exhaust.
Thanks,
Dan
Le Mans Master
Joined: Jan 2003
Posts: 8,596
Likes: 19
From: Portland Oregon
Originally Posted by RedZR
Anyone have any info on which cat has better flow numbers and performance?
I am looking at the Random Tech High Flow Metallic Converter # 703000
and the Dynatech "Power Cats".
The RT cats are much more expensive- which makes me wonder about the Dynatechs.
They will be going on my 91 ZR1 that currently has full length Watson headers & Corsa exhaust.
Thanks,
Dan
I am looking at the Random Tech High Flow Metallic Converter # 703000
and the Dynatech "Power Cats".
The RT cats are much more expensive- which makes me wonder about the Dynatechs.
They will be going on my 91 ZR1 that currently has full length Watson headers & Corsa exhaust.
Thanks,
Dan
Team Owner
Joined: Dec 2000
Posts: 90,675
Likes: 304
From: SE NY
Cruise-In II Veteran
Here are some relative flow numbers:
mfg.................p/n...................cfm
Random Tech....813000..............327
Dynatech.........DTC-78-400300...450
Random Tech....703000..............535
To support 400 hp at the crank you need a total of about 900 cfm exhaust flow.
mfg.................p/n...................cfm
Random Tech....813000..............327
Dynatech.........DTC-78-400300...450
Random Tech....703000..............535
To support 400 hp at the crank you need a total of about 900 cfm exhaust flow.
Thread Starter
Burning Brakes
Joined: Aug 2000
Posts: 952
Likes: 0
From: Morgantown,WV USA
Converters- Random Tech Vs. Dynatech Reply to Thread
Originally Posted by 65Z01
Here are some relative flow numbers:
mfg.................p/n...................cfm
Random Tech....813000..............327
Dynatech.........DTC-78-400300...450
Random Tech....703000..............535
To support 400 hp at the crank you need a total of about 900 cfm exhaust flow.
mfg.................p/n...................cfm
Random Tech....813000..............327
Dynatech.........DTC-78-400300...450
Random Tech....703000..............535
To support 400 hp at the crank you need a total of about 900 cfm exhaust flow.
Thanks very much !
Dan
Team Owner
Joined: Dec 2000
Posts: 90,675
Likes: 304
From: SE NY
Cruise-In II Veteran
I saw those numbers from an earlier post and saved them for future reference.
It looks like the Dynatech would be fine for your application. I'm not sure about the specifics on that cat (I assume they are 3" in/out though) but the flow number is right.
A book by David Vizard on SBCs states that it takes about 2.2 cfm of flow for each 1 chp before back pressure begins to absorb power to push out the exhaust gas. A 2 1/2" pipe flows about 560cfm so 2 1/2" true duals would be fine, though 3" duals will be ok too.
When I had my rear Y rebuilt by Mufflex Mufflex (link on my site) I talked with Denny about a very slim line hi-flow cat (3" in/out) but I didn't ask the mfg or p/n. But the cat was a very slim line and would work well under my C4. You might give him a call and get the specifics.
It looks like the Dynatech would be fine for your application. I'm not sure about the specifics on that cat (I assume they are 3" in/out though) but the flow number is right.
A book by David Vizard on SBCs states that it takes about 2.2 cfm of flow for each 1 chp before back pressure begins to absorb power to push out the exhaust gas. A 2 1/2" pipe flows about 560cfm so 2 1/2" true duals would be fine, though 3" duals will be ok too.
When I had my rear Y rebuilt by Mufflex Mufflex (link on my site) I talked with Denny about a very slim line hi-flow cat (3" in/out) but I didn't ask the mfg or p/n. But the cat was a very slim line and would work well under my C4. You might give him a call and get the specifics.
Thread Starter
Burning Brakes
Joined: Aug 2000
Posts: 952
Likes: 0
From: Morgantown,WV USA
Converters- Random Tech Vs. Dynatech Reply to Thread
Thanks for the info- any thought on the power difference between the two converter types?
Dan
Dan
Originally Posted by 65Z01
I saw those numbers from an earlier post and saved them for future reference.
It looks like the Dynatech would be fine for your application. I'm not sure about the specifics on that cat (I assume they are 3" in/out though) but the flow number is right.
A book by David Vizard on SBCs states that it takes about 2.2 cfm of flow for each 1 chp before back pressure begins to absorb power to push out the exhaust gas. A 2 1/2" pipe flows about 560cfm so 2 1/2" true duals would be fine, though 3" duals will be ok too.
When I had my rear Y rebuilt by Mufflex Mufflex (link on my site) I talked with Denny about a very slim line hi-flow cat (3" in/out) but I didn't ask the mfg or p/n. But the cat was a very slim line and would work well under my C4. You might give him a call and get the specifics.
It looks like the Dynatech would be fine for your application. I'm not sure about the specifics on that cat (I assume they are 3" in/out though) but the flow number is right.
A book by David Vizard on SBCs states that it takes about 2.2 cfm of flow for each 1 chp before back pressure begins to absorb power to push out the exhaust gas. A 2 1/2" pipe flows about 560cfm so 2 1/2" true duals would be fine, though 3" duals will be ok too.
When I had my rear Y rebuilt by Mufflex Mufflex (link on my site) I talked with Denny about a very slim line hi-flow cat (3" in/out) but I didn't ask the mfg or p/n. But the cat was a very slim line and would work well under my C4. You might give him a call and get the specifics.
