This is topic Swapping my 4.10's to 4.30 worth it? in forum Tech Talk at Northern California Ford Owners  .


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Posted by 9Roush8 (Member # 2472) on :
 
I have 4.10's in my car right now, would switching to 4.30 be worth it... looking for a little more down low... putting BBK lt's on it for christmas plus mods in sig.
 

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Posted by hidnn.o.s. (Member # 1219) on :
 
No, not worth it
 

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Posted by 1FAST89GT (Member # 5071) on :
 
not for a driver maybe for just track but it would be hell on the freeway
 

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Posted by Ryan Way (Member # 6284) on :
 
yes on a cobra absofreakiloutley DO IT they F'ing ROCK!!! Rpm son the freeway are not an isseat all with a 5 speed either, your speedo will be way off tho and i dont know if your spped is electronic. Your car will accelerate like a bat outa hell.

[ December 09, 2005, 06:50 PM: Message edited by: Ryan Way ]
 

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Posted by 1fast281 (Member # 4670) on :
 
4.30 gears are perfect for the 4V, they are not "hell" on the freeway. This isn't a pushrod motor. A 4.6 DOHC has more resemblance to a Honda engine than a 5.0. My rpm is at 3000 at 80mph with 4.30 gears with the 4r70w. Redline is set at 6600rpm right now.
 

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Posted by JohnB (Member # 969) on :
 
Don't bother going 4.30's from 4.10's. You will not notice a difference.

And please do not EVER compare a 4.6 to a Honda engine.
 

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Posted by 1fast281 (Member # 4670) on :
 
In a stock/bolt on 96-98 Cobra going from 4.10's to 4.30's is definately worth it. With 4.10's you have to shift into 4th near the end of the 1/4 mile which kills et and mph. 4.10's are good for around town, but not for the 1/4 mile because of this. A stock 96 Cobra with 3.73 gears will be faster in the 1/4 mile than a stock Cobra with 4.10 gears. I would reccomend going to 4.30's or 4.56's even. As far as the comparison of the 4.6 dohc to a honda engine, honestly the 4.6 is like a big honda engine without the variable valve timing.
 

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Posted by Spitfiremk24 (Member # 5698) on :
 

quote:

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Originally posted by 1fast281:
In a stock/bolt on 96-98 Cobra going from 4.10's to 4.30's is definately worth it. With 4.10's you have to shift into 4th near the end of the 1/4 mile which kills et and mph. 4.10's are good for around town, but not for the 1/4 mile because of this. A stock 96 Cobra with 3.73 gears will be faster in the 1/4 mile than a stock Cobra with 4.10 gears. I would reccomend going to 4.30's or 4.56's even. As far as the comparison of the 4.6 dohc to a honda engine, honestly the 4.6 is like a big honda engine without the variable valve timing.

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quote:

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Originally posted by 1fast281:
In a stock/bolt on 96-98 Cobra going from 4.10's to 4.30's is definately worth it. With 4.10's you have to shift into 4th near the end of the 1/4 mile which kills et and mph. 4.10's are good for around town, but not for the 1/4 mile because of this. A stock 96 Cobra with 3.73 gears will be faster in the 1/4 mile than a stock Cobra with 4.10 gears. I would reccomend going to 4.30's or 4.56's even. As far as the comparison of the 4.6 dohc to a honda engine, honestly the 4.6 is like a big honda engine without the variable valve timing.

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Ok, have you even DRIVEN a 96-98 Cobra? I dunno, but MY 97 Cobra had 4.10's and it was a requirement to shift into 4th a good ways before the end of the 1/4.
Big honda engine w/o the VV timing? That's saying every OHC engine is like a Honda. Man, I bet you like it when people ask you if that's your Grandpa's Lincoln

Stay with the 4.10's.
 

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Posted by 1fast281 (Member # 4670) on :
 
Yes, I have driven my friends 97 Cobra with 4.10 gears and it's a good gear for around town, no question. It is however undergeared for the 1/4 mile, that's why you see the factory stock 4V's that completely wiped out the 5.0's in the last two years running 4.56-4.88 gears. That's why they are handicappping 4v's next year to 3.90 gears, the fastest 5.0 factory stock efforts are at least 3 tenths and 3 mph slower than the fastest 4v cars. 3.90 gears are perfect for a 5.0 but extremelly undergeared for an all out NA 4V setup. Now if you have a forced induction 4V, 3.90's would be fine.
 

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Posted by hidnn.o.s. (Member # 1219) on :
 
"FACT,", IT IS ABSOLUTELY "NOT" WORTH IT TO SWAP YOUR 410'S FOR 430'S. If you had stock gears and wanted to upgrade all together that's one thing, but it would be a waste of money for the MINOR difference from 410's to 430's.
 

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Posted by 1fast281 (Member # 4670) on :
 
Exactly, that's why I said maybe go for 4.56. The difference between 4.10 and 4.30 gears is only a couple hundred rpm so it won't be that noticeble on the street. At the the track, I would guess in a 96-98 Cobra going from 4.10 to 4.30 it would drop .1-.2 tenths in the 1/4 mile. Going from 4.10 to 4.56 probably at least 3 tenths. Don't fear the gear with the 4.6 dohc...
 

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