Im switching my 96 integra Ls with a b16 si engine. I heard of people keeping the ls tranny and just swapping the block so that they keep the gas mil and that its heck alot faster with turbo. But then again I hear it's slow too.

Should i just full swap the si engine into my car or keep my ls tranny and only swap the block. Top priority isn't gas, though and i do want speed/fun. Also would keeping the Ls tranny mess with the vtech kicking in at all?

does anyone know how much slower it would be to just keep the ls tranny? Plus I'm not looking to go turbo...at least not yet.

 

this topic has been beaten to the ****en ground already, however, i'll answer it anyway. no, the ls tranny isn't better for turbo; the si and gsr ones are better.

if you're that worried about gas mileage then don't bother doing any engine upgrades; doing a b16 with a ls tranny won't give you any performance gains. if i was in your shoes i'd keep the ls engine and just get an si tranny. you won't see much of a positive difference, if at all, going to a b16 from a b18b. if you're dead set on getting a vtec motor, at least get a b18c with the proper tranny.

 

or build an ls/vtec. you're already half way there. your car is going to be a pig with that b16. take the head off it, do the things required to run an ls/vtec and rock that. search around on here for the "how-to" or check out b20vtec.com

 

quoting everything in the post before you is kinda retarded. anyway. i've been searching for info also on this. ls engine and b16 trans vs ls trans. what i've read alot of people doing is going with the b16 trans and using an ls final drive, to keep it some what reasonable on the highway.

 

Why put a motor that makes less torque into a heaver chassis? And why, if you're worried about mileage, would you put a tranny in that would have you smashing the pedal to go anywhere? lol.

 

If gas isn't your concern, then go ahead and do the full swap. It will take down your 0-60 time from 7.6 to maybe 7.1-7.3, thats how much difference it will only make inside a teg. By the way, you will still get whoop by other b16 coupe. If you want to save money and still keep up with b16 coupe, keep your ls motor and swap your tranny for a b16 and invest in light rims.

 

i've got a b16 tranny with ls 1st-5th it isn't too awful bad i guess but definitely stick with the b16 tranny for a good difference if it comes down to it do ls 5th swap for good highway gas mileage

 

Well, the reason i was going down to a b16 is cause i got it for cheep and my ls block is leaking plus has about about 200 miles on it. Don't really know how to rebuild an engine, although it still runs fine. Doesn't the si engine run about 160 hps compared to the ls 140 hps? I know that the ls is 1.8 L so it has more torque, But still, should i pass up the si B16 block then?

would it be faster if I kept the ls tranny and went b16 vtec turbo

 

what was the point of getting a b16 tranny only to switch all the gears over to ls?

200 miles? i'm guessing it was rebuilt? do you know the quality of the work? sometimes rebuilt motors run worse than non-rebuilt. yes, you should pass up on the b16 block. also, no matter what you do to the engine, a b16 tranny will give you improved acceleration. short gears are especially important with a vtec head, since with an ls tranny you'll fall out of vtec on shifts (1-2 shift for sure, not sure about the others).

 

I meant the Ls block has about 200,000 miles one it, and it's a non-vtec. Does anyone know if I could just take the v-tec off the si block and put it on the Ls...should i even do that even with an old Ls block???

 

oh ok, i thought you meant the si motor you were looking at has 200 miles on it (as in rebuilt). what's leaking on your ls motor? just because it has 200k miles on it doesn't mean it's not going to last a long time more. patrick94gsr has 200k+ miles on his gsr and i don't think it's ever been rebuilt. like i already said, i wouldn't put in the b16. either keep keep the motor you have now, get another low mileage b18b or even a b20, or do a b18c motor and tranny swap.

you could put the b16 head on the block, but in order to make it reliable you need to rebuild the block anyway. i'm against ls/vtec's because of the reliability issue (though some people disagree and this will be a never ending debate). i'd go with 1 of the 3 choices i mentioned above.

 

yea, that sounds good. The Ls has a oil leak coming out the side somewhere and i haven't has time to see where the heck its coming from. I'm tempted though because i have this 00 b16a si engine that will boost me up to 160 hp compared to my ls 140. But the thing is, I love Torque! I want that pull away feeling that you get from a 1.8 L. What would be the advantages in having a b16 engine anyways then?

Oh and just to mention this is going to be a daily driver, not a track runner. but i do wanna burn other people on the hwy who have stock cars. (espically gsr....damn B18c...how cheep could i get a B20?)

 

Hey another question, I been reading about people using the Si tranny with the b18 block on top. Sounds interesting, cause it gives the 1.8 with the high end transmission. Do you think i should do that? The thing is i do kinda want the V-tec that on the b16, (never had it b4. But I've driven my boy's gsr and i can barely feel the diff.)

 

like everyone else says, keep the LS and put in the b16 tranny.

 

Well IMO you should first identify what the oil leak is on your B18B. If it is something simple (like a valve cover gasket or a cam cap seal leaking) then you should fix your current engine. Clean the oil off before you fix whatever the issue may be, then run it for a few weeks after you are done to see if your fix worked. Just an FYI...An LS, GS, SE integra will not really benefit at all by installing a stock B16. Although the B16 can be ran at higher RPMs and it has VTEC, the extreme lack of torque makes it a poor choice in the heavy DC4 chassis. With the same car and similar drivers the cars would be about even. Some say running a B16 transmission on a B18A/B is a good choice as it is quicker due to the lower gear ratio of the B16 trans. Just remember that lower gear ratios tend to = slightly lower fuel mileage numbers and of course more shifting to get to 60 which you will not be able to do in 2nd with a B16 trans on a B18A/B. To answer your other question, a JDM B20 can be had for $500 to $750 shipped, but there are different varieties of B20Bs imported from Japan. Although some people swear they know which is which, I have had older JDM B20s with the lower compression pistons and the better flowing P8R head and newer B20s with the higher compression pistons, and normal P75 (B18B) head. If you have any more questions feel free to post more. Good luck!