say all engines are built up and i'm only looking for 300 whp on the street .. is there any advantage to getting a b20 or a gsr over a d16? like torque and powerband?

 

yea look at my gsr stock block mild built head 343whp. Friend has a 1.6 vitara build and knows even with his build it'll be hard to get my numbers. B series are just all around better motors cams, rods, heads, etc.

 

You can easily match those numbers with a d-series build.

Op, you can easily achieve your goal with any of those engines. If you only want 300whp then a piston/rod gsr/b20 might be a waste of money as you can achieve that easily on a stock block with a good tune. For a d-series you will need a piston/rod block to make that power safely.

However, while each of them can make the same power numbers, the more displacement/better flowing b-series heads are going to make the power much easier with less boost and will have a longer powerband because of their added deplacement.

At that point you need to decide what your utlimate goals are and what your budget is.

 

well im not too concerned with a budget yet as this would be a future build. i'm just looking for reliability and the way i'm thinking is that if i had a built b series i'd be running less boost which would cause less problems. and since the b series would have a bigger powerband would the 300whp b be quicker than the 300whp d? and more fun to drive lets say

 

Wow I love people like you. You did nothing more then just expaned on what I wrote the first time.

Yes if you have a stock b series at 300whp it will be faster. The reason being is simple the b series is faster stock for stock. On another note like i mention its a better flowing head and more aggresive cams. Personally if your only aiming for 300whp i would recommend just boosting a stock b series block, you'll have the low end power and top end power. You dont have to worry about the block either there are people making crazy numbers on the stock b series just make sure its a good tuner.

 

is it reliable to do that tho? i mean could it take as much abuse as a fully built forged engine?

 

how the **** do you think a stock engine will take as much abuse as a This FI forum is getting wacky!.....

 

i know it wont .. thats why i dont understand why ppl are sayin i should just turbo the stock b series

 

Do WHAT? 300 HP is 300HP. Doesn't matter if it is in a Briggs and Stratton or a Honda motor. Just because the B was faster stock doesn't mean that at 300 is is any faster. The power curve will be a different shape but what HP it has stock has no bearing on a modified engine.

The 300HP D or B will go fast. Your application and budget will determine what you are going to do with the motors.

 

My personal opinion is that since you have a turbo D16 already, why not build a block and head for it and tune it to 300whp (that is if your turbo setup flows to over 300whp). And if you build it right, you can go even higher than 300whp on a higher boost setting. I always thought that the D16 would have better low end torque due to it's longer stroke comparing to a GSR (90mm vs. 87.2). Proper turbo sizing will probably make the biggest effect on power band.

 

i want a good street vehicle with occasional tarck use

 

As one member said I would recommend sticking with the D series simple because by the time you get the B series block you'll have already have spent around 3000. If you have that money take it and just build the bottom end of the d series block.

 

And your point is? The OP asked for opinions, sure i stated some of the same information that you did, but i also provided other insight that you left out. Next time i see you post in a thread, i'll be sure to stay away because you are always correct and 100% complete the first time around. Good effort, but stop trying to act like a internet badass.

Oh and btw you should really reread what you had posted and compare it to what i did. You'll notice that you stated that it would be difficult for a d-series engine to produce 343whp once built, which is not true. Which goes against your theory that you're always correct and should be the only one allowed to reply in threads. So go yourself.

What type of track?

If the car will be used for road courses, a larger powerband would be desired. And for that, a b-series engine would suit your needs better.

If the car will be used for drag racing, any of the motors will be fine. Since you will always be in the top ~3k of your rpm range anways, you won't need all the torque and power in the lower rpms.

 

not going to argue with you we'll talk through PM's