I don't see any reason for him to get an LS tranny if he's SCing. The reason that you would want an LS tranny while turboing is this:

Boost kicks in at about 2500 - 2700 RPMs. With a GSR tranny, if you're on it and shift, the tranny is geared to keep you inside of vtec so you keep your power up thus keeping you above 4200 RPMs. If you have a turbo, you'r losing that range of 1500 RPMs worth of boost. On the other hand, the LS tranny is not geared that way because it doesn't have vtec to keep you in. Because it's not worried about vtec, the gearing drops you below 4200 RPMs and will allow you to utalize move of the boost power.

With a SC, it really doesn't matter imo cause boost is 'always on' and you can't waste boost.

That's my take.

 

the quicker you can bang thru your powerband and gears, the faster youll get down the track. but i made a mistake on what i said. your tranny will depend on what tires you are running, and your gearing will depend on how strong your powerband is. now obviously (i have to spell this out for all of the "veterans" on this board) you dont want gears so short that you will suffer from wheel spin all the way down the track. but you dont want your gears so long that it takes more time for your engine to build the power it requires to spin the gears. you want a good balance of top end speed but off the line acceleration. on a typical, american powered daily driver (and americans are the ones who pioneered drag racing) you want to bang thru 4 gears, thats all. but if you have tires with massive expansion characteristics, you dont need that many gears because your gear ratios will vary depending upon how much power is being transferred to the tire(s).

 

:bowdown:

Thank you so much for clearing that up

 

But like I said before, I'm trying to stay away from using vtec. I think it's more problems that it's worth. Not to mention, actually a small loss in power due to the mass amount of blow by that will be accuring.

So are you saying if I don't plan on using vtec I should stick with an LS tranny?

 

Do you mean turbo/boost/SC wash when you say blow by? Cuz you can tune it out with a set of cam gears.

 

Slacker, I don't think you really understand what blow-by is. And even if you do use a VTEC head you could eliminate VTEC if you wanted too. Several companies make valvetrain kits that eliminate VTEC. Using the VTEC head has benefits over a NON VTEC head even without using VTEC. How many of the big dog import racers do you know of that use a NON VTEC head. None. I have actually been doing some research on eliminating VTEC and all I have come up with is conflicting opinions on it so I will continue to inquire about it. And, you need to think about LSD when picking a tranny. I added the Phantom Grip LSD to my LS tranny and it works just as well as the OEM LSD in my stock B16A hydro tranny (which I still have).

 

sounds like this is your first build up.
don't do the ls/vtec or the b20/vtec build up. get familiar with working on motors and then venture out and do the ls/vtec setup if you want. i feel the best motor to buy and work with is the b18c1, the bst motor to buy and build up is an sir1 b16a. only $450 for a long block cheap to get started with.

as for the tranny. the ls will be in boost longer per gear, but will nto acclerate as quickly as the transmission found on the b18c1. you can swap b series tranny's on any b series block.

the spoon tranny is pretty much a spec r tranny from honda with the spoon logo. no real need to buy it, and ordering in a big object like that from spoon will slow down your buildup cause you will NOT receive that tranny for a few months. spoon isn't that large of a company.

buy a b18c1 swap and boost it. buy a quaiffe LSD and put it in your tranny. you'll be happy with it. you'll may have to shift into 5th gear by the end of the quarter mile, but it's not a big deal.


ls or gsr tranny are both fine. i'd rather have a gsr tranny than the LS, that's all personal preference.

 

I've been watching this thread trying answer the same Q that Slacker had.
Bumnah's post has been MOST hepful. I could'nt decide bewteen b18c1, LS, or B20.

I'm going with B18c1 and a t3/t4 turbo!

Spike

 

I was at the local junkyard looking around and low and behold what do I see on the rack? A 1995 GSR motor and 5 speed tranny with 71,000 miles on it. So, after picking up a few things for some friends I go talk to the guy at the front desk and ask him how much they are asking for it. To my delight, he responds,"$2,000.00, I was asking $2,800.00 but no one bit so I just need to move it.". So, I gave him a check for $500.00 and told him I'd be back on the 6th to pay the balance. My wife was a little upset but I just could'nt pass that up. He showed me the car it came out of and it was a white GSR with pretty minimal damage to the rear. I wa surprised they even totalled it but he sai dthe frame was tweaked pretty bad. He's already sold the leather seats and most of the interior. I can't believe no one got the motor even at $2,800.00. Back when I bought My second B16A B18C1 changeovers were going for about $3,000.00-$3,500.00. I'm not even sure I'll use it as of now but I can easily sell it for $3,000.00 and make $1,000.00 off it. But, maybe I'll sell the CRX and find a decent 5th gen hatch to slap it in.