I have a 2000 integra LS, and i want to go turbo. I have recently bought a fidenza flywheel with a exedy stage 1 clutch and LSD. I was planning on putting these in a 99-00 Civic SI tranny. But now that I've decieded to go turbo should i stay with my tranny or go with the SI LSD? And which head would breathe/work best with a ls turbo?

thanks

 

i'd stick with the ls tranny if i were you, it's just extra money/hastle to switch to another one. are you doing the work yourself or having a proffessional do it?

 

i am going to have a proffessional do it.

 

Which LSD did you buy?

A B16 tranny would indeed be a very worthwhile upgrade, plus the sale of your stock tranny could easily offset most of the cost. It shouldn't take more than a couple of hours to swap the tranny anyway.

Regarding the head, unless you plan on properly building an LSV, then just stick with the LS head.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 00IntegrAllmotoR &raquo;</TD></TR><TR><TD CLASS="quote">i am going to have a proffessional do it.</TD></TR></TABLE>

Well that certainly takes all the fun out of it.

 

i would get a b16 head because compression will be lower then a GSR head or Type R...and could take the turbo easier not only that it would reduce the chances of over boosten.....while your at it you should get low compression pistions like 9:1 and yes i would stick with your LS tranny........one ratios are a little longer but it would take more torque, and a SI tranny..would let you max out at 135 mph at 8000 rpms not too fun.....ls would let you go a little fast......


The reason why you should get lower compression pistons is because if you use a Vtec head and boost your compression ratio is gonna be way to high around 12.5:1 and its gonna give you mad Detonation because there is no gas with high enough octane in the US..you would need like 102 atleast to stop detonation in the long run detonation will burn a hole thur your pistions.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Lauj87 &raquo;</TD></TR><TR><TD CLASS="quote">and could take the turbo easier not only that it would reduce the chances of over boosten</TD></TR></TABLE>

The head choice has virtually nothing to do with the car overboosting.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Lauj87 &raquo;</TD></TR><TR><TD CLASS="quote">i would stick with your LS tranny........one ratios are a little longer but it would take more torque, and a SI tranny..would let you max out at 135 mph at 8000 rpms not too fun</TD></TR></TABLE>

The B16 tranny will allow for faster acceleration. And why in the hell would anyone need to go more than 135 miles per hour?

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Lauj87 &raquo;</TD></TR><TR><TD CLASS="quote">The reason why you should get lower compression pistons is because if you use a Vtec head and boost your compression ratio is gonna be way to high around 12.5:1 and its gonna give you mad Detonation because there is no gas with high enough octane in the US..you would need like 102 atleast to stop detonation in the long run detonation will burn a hole thur your pistions. </TD></TR></TABLE>

Actually, stock LS pistons are low compression pistons. The only way you'll hit 12.5:1 with OEM pistons would be with PCT's. Just make sure the bottom end is balanced.

 

ill probably go with the B16 head, and i might as well go through with my first plans on my Si tranny, i could always switch if i dont like and i bought parts for it already.

thanks guys on the info!
good night

 

well its not soo much maxing out at 135mph.....depending if he wants to save gas while driving on freeway or streets.....4000 RPM's at 80 mph on freeway with b16 tranny..with lS he'll be around 3000 rpms 80mph.....but yes he will be alot quicker with a b16 tranny cause ratios are short.....one of my friends has an ls vtec turbo w/b16 tranny.....spin tires all day only way to cure it is slicks..but if he got slicks then yeah hes all set!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Lauj87 &raquo;</TD></TR><TR><TD CLASS="quote">well its not soo much maxing out at 135mph.....depending if he wants to save gas while driving on freeway or streets.....4000 RPM's at 80 mph on freeway with b16 tranny..with lS he'll be around 3000 rpms 80mph.....but yes he will be alot quicker with a b16 tranny cause ratios are short.....one of my friends has an ls vtec turbo w/b16 tranny.....spin tires all day only way to cure it is slicks..but if he got slicks then yeah hes all set!</TD></TR></TABLE>

80mph @ 4000 rpm is a GSR tranny. a b16 would be spinning at 4500 rpm. and unless he's making over 400whp, all an LS tranny will do is slow you down.


also, slapping a B16 head on a stock ls block will not raise your compression to anything near 12.5:1. probably somewhere closer to 10:1 which many will tell you that is perfect for a boosted STREET car.

 

Keep your LS tranny. B16 trannies are overrated.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Sh!ttyLS &raquo;</TD></TR><TR><TD CLASS="quote">Keep your LS tranny. B16 trannies are overrated.</TD></TR></TABLE>

i agree, and why put more money on something that could be spend better elsewhere...least thats my opinion.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Sh!ttyLS &raquo;</TD></TR><TR><TD CLASS="quote">Keep your LS tranny. B16 trannies are overrated.</TD></TR></TABLE>

RIGHT if having a faster car is overrated

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 2gintegra187 &raquo;</TD></TR><TR><TD CLASS="quote">

RIGHT if having a faster car is overrated</TD></TR></TABLE>

Explain this, why would he spend money/time on swapping to a b16 tranny, when the money could be better spent. The only way you can prove to me the significance of this swap would be for someone to post some timeslips. One with an LS tranny, one with b16 (same car). If the b16 is substantially faster, then I'll retract my previous statement.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Sh!ttyLS &raquo;</TD></TR><TR><TD CLASS="quote">

Explain this, why would he spend money/time on swapping to a b16 tranny, when the money could be better spent. The only way you can prove to me the significance of this swap would be for someone to post some timeslips. One with an LS tranny, one with b16 (same car). If the b16 is substantially faster, then I'll retract my previous statement.


</TD></TR></TABLE>

So you're saying that a shorter geared transmission will not show any positive performance gains? Sorry to break it to you pal, but a shorter geared tranny will out-accelerate a longer geared tranny. b16= shorter, ls= long, therefore, b16 out-accelerates the LS.

And btw, it really isnt much money being spent. He could probably find a b16 tranny for close to 500 bucks, and in return, he can sell his LS for about that same price range. The only hassle is dropping the tranny out to do the swap.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Nine5IntegraLS &raquo;</TD></TR><TR><TD CLASS="quote">

So you're saying that a shorter geared transmission will not show any positive performance gains? Sorry to break it to you pal, but a shorter geared tranny will out-accelerate a longer geared tranny. b16= shorter, ls= long, therefore, b16 out-accelerates the LS.

And btw, it really isnt much money being spent. He could probably find a b16 tranny for close to 500 bucks, and in return, he can sell his LS for about that same price range. The only hassle is dropping the tranny out to do the swap.</TD></TR></TABLE>

Thank you Captain Obvious. I realize that b16 gears are shorter than LS gears. I simply said that a b16 tranny is overrated. People treat everything that has to do with B16s and VTEC as though jesus himself designed it. Its just not that great, and for a turbo setup, a b16 tranny, IMO, isn't necessary. If he were doing an all-motor LS/VTEC then maybe I could see why he would do it.

Agree to Disagree

 

.........either way he goes he gains some and loses some... both have thier pros and cons....just gotta line them up and see which has more cons for the driving conditions he has......personaly i would get a GSR tranny because ratios arnt too short or too long....good for crusin and when you wanna get on it.....so it would be a better choice if its gonna be a daily driver too..but if its a project...go B16!

 

B16 head.

I'm sticking with my LS tranny and I have a LS/V setup. You want shorter gears, the B16 tranny will suit you.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Lauj87 &raquo;</TD></TR><TR><TD CLASS="quote">.........either way he goes he gains some and loses some... both have thier pros and cons....just gotta line them up and see which has more cons for the driving conditions he has......personaly i would get a GSR tranny because ratios arnt too short or too long....good for crusin and when you wanna get on it.....so it would be a better choice if its gonna be a daily driver too..but if its a project...go B16!</TD></TR></TABLE>

I agree, if you're gonna swap trannys then get a GSR

 

my LSD is made for the 99-00 SI only! dont know why?