Yes, it will rob some power and the weight difference is about 40 or 50 lbs if I recall.
No the termi T56 has a 0.63 6th.
Are you sure? I was told by somebody that's already done the swap that you needed to do both.
5-speed swap to 6-speed manual
- Thread starter STLSN95
- Start date
Yes, it will rob some power and the weight difference is about 40 or 50 lbs if I recall.
No the termi T56 has a 0.63 6th.
Are you sure? I was told by somebody that's already done the swap that you needed to do both.
rz5.0
Legend
He is doing the swap right now..
OnyxCobra
Post Whore
Is there any reasoning behind robbing more power? I've always read the 6th gear was .62 but either way it's not like it's going to make or break your decision over .01. It depends which U joint you're talking about, if you buy an 03 Cobra driveshaft you either have to install the pinion flange or swap the U joint at the rear. That's the easiest way to do it, otherwise I guess you could swap both U joints if you needed a new yoke but then you'd have to get the stock driveshaft shortened as well.
I considered doing the T56 swap on my 99 cobra a while back and did some extensive research on it. I found numerous sites online where guys posted their dyno numbers both before and after the T56 swap. In almost every instance, there was a consistent drop of about 30 to 35 RWHP.... not just with mustangs, but with other cars too.
OnyxCobra
Post Whore
30whp? Sorry I have to call bs on that one, doesn't make sense. in fact this is the first I've heard of it.
I don't have time to dig up the threads, but here's one that I found by doing a quick search just now:
http://forums.corral.net/forums/5-0-5-8-engine-tech/1369072-ford-strokers-dart-363-dyno-finally.html
rz5.0
Legend
Gear*Ratio*1st*2.66*2nd*1.78*3rd*1.30*4th*1.00*5th*0.80*6th*0.63*Reverse*2.90
Guess .63 is right
*
OnyxCobra
Post Whore
So he switched to a slightly larger motor and a T56 and gained about 35whp (i'm no expert but 347-363ci that seems pretty good for same parts?), that's after saying his 347 was freakishly overpowerful and also saying he never had the car on the dyno after the T56 swap, just datalogging on a stretch of road. I'm not 100% sure how datalogging works but when I did it in my car I don't recall seeing anything that would have indicated a gain or loss of power, but more what you need to change to better the tune.
So say the trans took 30whp (call it 35hp at the engine), does he really thinks witching from a 347 to a 363 with all the same parts would actually gain him ~85 at the engine? (dynoed 35 more with new build + supposed 32whp loss from T56) That seems a bit optimistic to me but someone more familiar with this please enlighten me. It just doesn't add up.
So say the trans took 30whp (call it 35hp at the engine), does he really thinks witching from a 347 to a 363 with all the same parts would actually gain him ~85 at the engine? (dynoed 35 more with new build + supposed 32whp loss from T56) That seems a bit optimistic to me but someone more familiar with this please enlighten me. It just doesn't add up.
OnyxCobra
Post Whore
rz5.0 i'm 99% sure the Cobra trans has the 2.97 first gear, not the 2.66 that everyone seems to like to post. so I'm not really sold on believing those posts I guess you could say.
I guess you didn't read the whole thread, specifically this post: http://forums.corral.net/forums/11005630-post9.html
Regardless... don't take my word for it. I'm only reporting what I've read on numerous sites and been told by others.
rz5.0
Legend
Sorry but no.
1st-2.972nd-2.073rd-1.434th-15th-.806th-.62
Sound like this is three gear ratio your thinking about..
That's the cobra r gear ratio.. Also used in the fox swap ford racing t56..
The sucky thing about this gear ratio. Is there is no 26 spline upgrade for the input shaft..
This is the trans i have right now.. Unless you get one custom made.
1st-2.972nd-2.073rd-1.434th-15th-.806th-.62
Sound like this is three gear ratio your thinking about..
That's the cobra r gear ratio.. Also used in the fox swap ford racing t56..
The sucky thing about this gear ratio. Is there is no 26 spline upgrade for the input shaft..
This is the trans i have right now.. Unless you get one custom made.
http://www.ttcautomotive.com/English/media/pdfs_autogen/T-56.pdf
TUET-1694
1st: 2.66
2nd: 1.78
3rd: 1.3
4th: 1.0
5th: 0.79
6th: 0.63
Rev: 2.9
rz5.0
Legend
that's what The Source told me. He is on other forums. Deals with Trans.
OnyxCobra
Post Whore
Oh gotcha, either gearing I'm fine with. The car will be on the road soon enough and the proof will be in the pudding.
I read that, it clearly says he never had it on the dyno after the T56 swap. he didn't install a 16ci larger engine and make 80 more hp, that guy is out of his mind if he thinks that regardless of what he thinks he sees in his data-logging.
I read that, it clearly says he never had it on the dyno after the T56 swap. he didn't install a 16ci larger engine and make 80 more hp, that guy is out of his mind if he thinks that regardless of what he thinks he sees in his data-logging.
rz5.0
Legend
Aslong as your happy with it your fine..
rz5.0
Legend
I think 30 is allot.. Its hard to say unless they dyno back to back after the swap with no other changes..
You can't really say it's going to be 30 hp lost since it really depends on your power level.
I don't a see a extra gear taking all that much more power to turn..
You can't really say it's going to be 30 hp lost since it really depends on your power level.
I don't a see a extra gear taking all that much more power to turn..
