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-   -   C4 auto to 13b rew quick question (https://www.rx7club.com/rotary-drag-racing-167/c4-auto-13b-rew-quick-question-747178/)

sk8world 05-15-08 11:41 AM

Whats the cost differance in g-force and other such units? I am ready to start this conversion but want to make sure on whats the best for me.

Viking War Hammer 05-15-08 12:02 PM


Originally Posted by sk8world (Post 8193721)
Whats the cost differance in g-force and other such units? I am ready to start this conversion but want to make sure on whats the best for me.

Judge Ito was selling his G-Force transmission awhile ago, I looked into buying it................ but it was $9,000 used.

sk8world 05-15-08 08:15 PM

wow. Thats more than I want to spend on my weekend warrior. I and when I get serious about racing I can see going that route. So I contacted Redneck and they had no clue about rotary's or if the imput shaft would work. Basically said we can not help you in that area. ?? I thought these guys did a few? Or was it other turbo cars you were speaking of?

Viking War Hammer 05-15-08 08:23 PM


Originally Posted by sk8world (Post 8195669)
wow. Thats more than I want to spend on my weekend warrior. I and when I get serious about racing I can see going that route. So I contacted Redneck and they had no clue about rotary's or if the imput shaft would work. Basically said we can not help you in that area. ?? I thought these guys did a few? Or was it other turbo cars you were speaking of?

Redneck doesn't do the rotaries. They just sell built C4's.

Carribean sells the rotary C4 conversion kits.

Viking War Hammer 08-04-08 04:30 PM

Picked up a auto bellhousing finally.

Does it matter which C4 I use, a pan mounted dip stick or pump mounted dip stick?

13BT_Starlet 08-05-08 09:24 AM


Originally Posted by Viking War Hammer (Post 8438406)
Picked up a auto bellhousing finally.

Does it matter which C4 I use, a pan mounted dip stick or pump mounted dip stick?

I would use the case dip stick rather than pan due the fact that the pan style case is the large bellhousing ford style and you will run into clearences problem with the starter which you alerady have with the small bellhousing case one which you have to do some trimming but not mutch , check out the pics I posted on this thread its the case dip stick style.

Viking War Hammer 08-05-08 12:03 PM


Originally Posted by 13BT_Starlet (Post 8440437)
I would use the case dip stick rather than pan due the fact that the pan style case is the large bellhousing ford style and you will run into clearences problem with the starter which you alerady have with the small bellhousing case one which you have to do some trimming but not mutch , check out the pics I posted on this thread its the case dip stick style.

Thanks a bunch. I'm going to have someone local build the converter. The bungs on your converter, could you possibly measure how tall those are?

Is there anymore information they gave you about the converter?..... or did they just say it's a 6500 Converter? Anything about the bearing design, balloon plate, hardened splines, stator or sprag assembly?

Have you weighed yours?

Thanks dude!

Viking War Hammer 08-05-08 03:41 PM

FYI, for anyone interested.

I've found a converter race shop that has recommended doing the following. Doing it this way would allow direct mounting to your stock flexplate.

I would send them my stock 13B Torque Converter.

They would use the front half of the stock 13B converter.

They would install C4 guts and put the ass end of a C4 converter on.

Viking War Hammer 08-05-08 07:46 PM

Alright, www.dirtydogperformance.com

I just talked to him again, he's going to mail me a C4 hub so I can take measurements. Then, I'll send him the stock RX7 Converter so that he can build me a custom unit. It's going to be a light weight 9 inch 6500 converter.

He said it will be $500. :) Not bad, huh ;)


I'll make a new thread, showing how to re-drill the stock bellhousing ti fit with the C4 pump etc. etc.

ultimatejay 08-05-08 10:44 PM

9000 bucks! Does that come with a jar of vasoline and a corncob?

Ps. Auto's are for pussy's that can't shift. LOL

Viking War Hammer 08-05-08 11:30 PM


Originally Posted by ultimatejay (Post 8442726)
9000 bucks! Does that come with a jar of vasoline and a corncob?

Ps. Auto's are for pussy's that can't shift. LOL

9,000 bucks? Where did you get that figure? :dunno:

I could shift if I wanted to, but I'd rather make back to back 9 sec passes with a beer in my right hand :icon_tup:

ultimatejay 08-05-08 11:38 PM

Judge Ito was selling his G-Force transmission awhile ago, I looked into buying it................ but it was $9,000 used


^

I just don't see a lot of top rotaries using auto's and I think it's because the rotary has a low torque high power band and does not work well with auto's. You see most of the rotaries using auto's are sitting at the lights for like 5 seconds trying to get the boost up- race is over by then. hehe. You're also adding quite a bit of weight and rotating mass.

Viking War Hammer 08-06-08 09:59 AM


Originally Posted by ultimatejay (Post 8442893)
Judge Ito was selling his G-Force transmission awhile ago, I looked into buying it................ but it was $9,000 used


^

I just don't see a lot of top rotaries using auto's and I think it's because the rotary has a low torque high power band and does not work well with auto's. You see most of the rotaries using auto's are sitting at the lights for like 5 seconds trying to get the boost up- race is over by then. hehe. You're also adding quite a bit of weight and rotating mass.

oh yeah, his gforce was expensive....... way out of my league

check out the aussie guys and the ricans, those guys have good luck with autos....... its all in the converter selection

what's a little rotating mass if you've got consistancy? refer to erniet

13BT_Starlet 08-06-08 09:04 PM


Originally Posted by Viking War Hammer (Post 8441447)
FYI, for anyone interested.

I've found a converter race shop that has recommended doing the following. Doing it this way would allow direct mounting to your stock flexplate.

I would send them my stock 13B Torque Converter.

They would use the front half of the stock 13B converter.

They would install C4 guts and put the ass end of a C4 converter on.

Thats the hole concept of the rotary to c4 tranny converter , mine has the stock S5 AT converter with the c4 guts and c4 pump inout shaft .

13BT_Starlet 08-06-08 09:24 PM

^

I just don't see a lot of top rotaries using auto's and I think it's because the rotary has a low torque high power band and does not work well with auto's. You see most of the rotaries using auto's are sitting at the lights for like 5 seconds trying to get the boost up- race is over by then. hehe. You're also adding quite a bit of weight and rotating mass.[/QUOTE]

I am not sure if you are familiar with Lowe Performance , but anyways He runs a AT Tranny and is in the 7's . In my book is all in having the right combo it's going to take alot of time to find out the right tire size along with the right gears to meet with your engine power band . I have yet to see anyone put a car together to run a specific time and done it the first time out , I take alot of effort and changes . I have been to quite alot of events and seen alot of highend $ car with High $ tranny's and still have hard time getting to shift and miss gears .

13BT_Starlet 08-06-08 09:28 PM


Originally Posted by ultimatejay (Post 8442726)
9000 bucks! Does that come with a jar of vasoline and a corncob?

Ps. Auto's are for pussy's that can't shift. LOL

What car and Tranny combo you got ? Post up some pics of your setup maybe it might change my mind and go the other route:hahaha: , but for now I'm staying with the AT:lol:

Viking War Hammer 08-06-08 10:50 PM


Originally Posted by 13BT_Starlet (Post 8445630)
Thats the hole concept of the rotary to c4 tranny converter , mine has the stock S5 AT converter with the c4 guts and c4 pump inout shaft .

Really? See, I thought you had a C4 converter with custom mounts :lol: :wallbash:

My bad !

Viking War Hammer 08-06-08 11:05 PM

Check out this C4 powered rotary

http://www.youtube.com/watch?v=oxwaQ7uWBkQ

sk8world 08-07-08 02:05 AM

2 Attachment(s)
I will post this here also.. Thinking of a future project RX3. What do you think? Would be a drag car only. I can pick it up very cheap..??

mazda1200 08-07-08 02:17 AM

nice car...

rotorholic 08-07-08 02:41 AM

how cheap?
 

Originally Posted by sk8world (Post 8446369)
I will post this here also.. Thinking of a future project RX3. What do you think? Would be a drag car only. I can pick it up very cheap..??

passing thru alabama early next week:lol:

Viking War Hammer 08-07-08 08:27 AM

13B C4 Automatic Video ........... cool

http://www.youtube.com/watch?v=pSRSIUEoWgg

Viking War Hammer 08-07-08 08:28 AM

C4 13B............ 9.90@ only 133 mph........ http://www.youtube.com/watch?v=zJh-MWUs9mk

who says you don't have to shift a auto ....... haha

Viking War Hammer 08-07-08 08:35 AM

More C4 13B's and wildness....... Red car has a C4

http://www.youtube.com/watch?v=roki_vEpy0U

Viking War Hammer 08-07-08 08:36 AM

C4 13B car on the dyno, check out the fire..... :)

http://www.youtube.com/watch?v=wZb7POiufdc


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