I am planning on doing an LS swap with a GSR tranny but now im starting to look at costs and i think for about the same $$$ I could pick up a B20B block, have it sleeved and mate it with a GSR tranny. Which would you guys say is a better base for boost? I am looking for alot of torque, in the 240-250 range. I have seen some LS's make around that with 15 psi of boost. How much easier or harder would it be to reach my goal with the B20 sleeved?

 

If I can remember correctly, full LS swaps are only like $800 Some dollars, I'm not positive though, they've gone down considerabely.
Low compression (Not saying th b20 doesn't have it)
Sleeves (Stock for Stock) are stronger
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If you wanna be one the many boosted LS people, join the crowd.. It's not that common to hear about a boosted b20.

 

no doubt both motors are cheap.

I myself have a b20b w/ gsr tranny. t3/to4b turbo...small, but just right for me. little or no turbo lag.

with stock b20 sleeves (lol...i know) i made 249whp and 225tq on 10lbs.

a b18b w/ piston and rods. t3/to4e turbo...i think. made around 290whp and 248tq on like 13lbs.

what does that tell you? (i have charts too)

if you have the money to buy a b20 block and sleeve it, i say go ahead and do it. LS/B20 heads are dime a dozen...people use them as coffee tables

B20 sleeved w/ pistons and rods...240-250tq is a joke! 15-20lbs will make you well over what you want. I'm going to guess you will be boosting 15lbs on a built block.

BUT building a block from nothing gets expensive!

 

Well right now I can get a full LS swap with a GSR tranny for $2600CDN and thats installed with an auto to manual conversion.

I could probably find a B20 engine for around $700-800 and a GSR tranny is about $800 up here. I figure for a bit more money I could sleeve the B20 block and it would be stronger than any stock honda block.

As for the turbo setup I have posted it up before, it included an EL manifold, T3/To4e 57 trim .48ar turbo and 3" DP/exhaust. I didnt have huge goals but now im starting to think i should do it right the first time.

your numbers on the B20b seem to be what i figured i would get with an LS at 10psi. What do you think a sleeved B20 with 9:1 compression and 15 psi would put down?

Definitely dont wanna get too extreme, for "building" the engine I just want to have strong cylinder walls and low compression.

 

if you think that then just get a LS motor and boost it. You wont reach that torque goal u want unless ur doing well over 10lbs.

 

if you have the option of sleeving. Sleeve the b20 block

 

Generally what ive seen with an LS at around 10psi is 220tq and 250whp, at 15 psi i would be close to my goal but also on the limits of the motor.

Would it be worth it to sleeve an engine and putting in some pistons to lower compression? The car is a street car only pretty much.

 

So would it be worth it to sleeve a B20 block or just stick with a stock LS block? If I could get a nice power gain and also have a nicer powerband with the B20 I would definitely go that route. If its not gonna make much of a difference as far as power and where the powerband is then ill just stick with a stock LS.

 

I would personally go with a stock LS over a b20 with just sleeves....

Sounds like you wouldnt get aftermarket pistons, rings, or rods on the b20. So if you blew the ringlands you'd have to crack the bitch open again.

 

i made 259whp at 211wtq on 10psi on my stock b18b

Khoi

 

I would get pistons to lower compression to around 9:1, I just dont wanna spend a ton of money on the internals for the engine.

Sohc Driver - I really like your setup and mine will be quite similar with the LS block except I will have an EL manifold and a couple other "improvements".

 

Why not sleeve a b18b to 84mm so you have a 2.0l. The b18b block is cheaper.

 

That wouldnt be a bad idea at all, how much do B18B blocks usually go for down there?

What else would I need to get to make a 2.0L B18B work? New pistons and rings are the obvious choices but is there anything else like headwork?

 

Bump

 

Here's a good question, why do people limit there B18B turbo setups to around 300whp on pump gas? Is it because the cylinders cant handle more power or is it the stock internal parts?

There is a place up here who will T-Top sleeve a b-series motor for $1600CDN including sleeves and im wondering if its worth it to look into that or if i should just be looking at boring the motor to give me a few more cc's and get some cutom pistons to have compression around 9:1. Also maybe look at some stronger head studs, rods etc. I am wondering if one solution is better than the other to have a reliable motor that can put down more than 300whp.