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h2b 4.9 final drive??

Old 01-17-2011, 08:15 PM
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Default h2b 4.9 final drive??

watsup guys wondering if it would be wise to do a 4.9 final drive b16 trans with a mild h23bluetop setup?? would it be to low to utilize the torque?? ive been searching and cant find any info on it. i will be running 24.5 inch m@hs
Old 01-17-2011, 08:38 PM
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Default Re: h2b 4.9 final drive??

Way to short, you have no RPM to make up for the mph lost id stay with a stock b16 trans if i were you, believe me my buddies h23 seems perfect with the b16 trans anything shorter would be ridiculous. Try out the zeal transmission calculator should help you out with what you want
Old 01-17-2011, 09:37 PM
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Default Re: h2b 4.9 final drive??

Originally Posted by The Ogre
Way to short, you have no RPM to make up for the mph lost id stay with a stock b16 trans if i were you, believe me my buddies h23 seems perfect with the b16 trans anything shorter would be ridiculous. Try out the zeal transmission calculator should help you out with what you want
sounds like a plan.
Old 01-17-2011, 10:08 PM
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Default Re: h2b 4.9 final drive??

for a road race car yeah
Old 01-17-2011, 10:25 PM
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Default Re: h2b 4.9 final drive??

Originally Posted by turbociv910
for a road race car yeah
that would be fun
Old 01-18-2011, 03:45 AM
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Default Re: h2b 4.9 final drive??

i think thats something you should look into AFTER you have the car dyno'd
you're going to want to see how your powerband looks and where your peak power is

i think with a 4.9, you're going to need to carry out the power a bit on an H
Old 01-18-2011, 03:53 AM
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Default Re: h2b 4.9 final drive??

bigger is better, shorter is better. road race use, of course.
Old 01-18-2011, 06:57 AM
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Default Re: h2b 4.9 final drive??

I would think a 4.7 would be much friendlier street/strip wise
Old 01-18-2011, 08:22 AM
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Default Re: h2b 4.9 final drive??

Would depend upon where you're making power and how much.
Old 01-18-2011, 10:33 AM
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Default Re: h2b 4.9 final drive??

Is this going to be a dedicated track car? Just a daily to take to the track sometimes?

I say take it to the track on the stock b16 trans with the tires/suspension setup you plan to run and see where you exit the traps (what RPM) and you can choose from there.
Old 01-18-2011, 04:16 PM
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Default Re: h2b 4.9 final drive??

Originally Posted by The Ogre
Is this going to be a dedicated track car? Just a daily to take to the track sometimes?

I say take it to the track on the stock b16 trans with the tires/suspension setup you plan to run and see where you exit the traps (what RPM) and you can choose from there.
its going to be 90 percent drag strip 10 percent street. i live in small town no freeways here. i really think 4.7 will help at the track with 23 m@hs but hurt on the street cause of tire spin. but maybe im wrong...
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