Need help with Boost

I have a '90 Si with a blown head. I had my friend that works at a performance shop look at it and i've tried different things to determine what was or wasnt wrong with it. Im doin a motor swap and i want to go with a b16. The main reason is i like the redline. While all the B18's and B20's shift at 6500 RPM ill just be hittin peak HP then. But no matter what motor i put in my car im puttin turbo on it. after talkin to friends and doing a little research i dont think the b16 would be good for turbo since the rods are weak and prong to breaking with high amounts of boost.

So now im thinking about keeping my D16 and sleeving the block and getting a ported D16z6 head and intake manifold and putting that on my block i have now. I would like to be able to run 15-18 psi on a T3/T4 hybrid turbo or a Garret T25 if need be.

Which motor would be better for that psi with either turbo?

if you have the funds i would build a b20 block with a b16 head a b20 has a near perfict bore to stroke ratio and could handle the presure but it would be a heavy heavy swap and exspensive

well if you wanting to run 18 lbs your going to need bottom end work done anyways. In my oppinion b16's are good for turbo use because of the short stroke length. If you have the money and know how and throw everything together right a lsvtec or a b20vtec would be a monster.

there's an article in this months HCI magazine about boosting a b16. They wanted to see how much boost they could throw in a stock b16 before something went wrong. I cant remember what turbo they had but it was a big one. in the first part they made it to 17 psi and 423HP 283 tq then a piston broke where the rings sit. In the second part they replaced the pistons with a set of forged ones, and put the engine back together with the same head bolts! they eventually got it up to 23psi and 507hp 320 tq then ran out of dyno time. The point of the article was that a b16 can take a beating and people who say they have weak rods are just plain wrong. You should go pick it up. It should still be on the shelves.

exactly those who said the rods are weak are stupid. they are just as strong as any other b series. and as you probably were told before, dont give us a psi number, give us a hp number so we can accomadte you alittle better to your needs, dont plan on going high hp with that t25, i would recommend the t3/t4

423HP? thats almost if not at least double what i hear the b16 will give u with stock internals but how reliable would that set up be. I dont think u could keep it at 17psi for a daily driver.

Aight thanks for all your help...I want anywhere from 100-150 hp from the turbo. I want it to spool up quick and mid-to-high range power. which my mind is made up on the T3/T4. As far as the motor..I think a DE16A6 block with a T3/T4 turbo would be unique and deff a sleeper with 15-18 psi which in return (please correct me if im wrong) would give me around 100-150 hp.

with that turbo i'd expect to see 8-9 hp per psi

Dont be a jack off, do the numbers insted of just randomly pulling a turbo out of your ass because its popular.

Bitch i did the dam numbers if you werent jackin off to the naked mid-sections of the women on your signature and would take the time to read what ppl are sayin. a post like that shouldnt even been put in here. im tryin to get help about turbo...not someone saying im not doin what i am. i named the turbo and the number and the psi. this is why i stopped postin on AF, stupid ass ppl like you give forums bad reps. and let the admin comin in here and say somin. The silent chamber should kept his mouth silent and shouldnt have been alowed to post. Then i wouldnt of had to get flip when it dont even matter what i say it aint gona change nuttin. Now everyone (except slient i know he/she got somin to say back about this but this is all im goin to say to him) disregard all this and continue on with the topic of this thread.

Without better rods, that much boost on d16a6 block will go boom!

Edit: or rather, snap....

I was looking last night and i found iron ductile sleeves and my mind is made up about getting eagle rods. Im not sure about the pistons tho. My block will be strong and im going to rebuild the head too. i would like to get a ported and polised head along with a ported and polished intake manifold but i havnt been able to find a p&p head and i havnt looked for the intake manifold. i might just buy a d16z6 head and get it p&p'ed myself.

Oh I'm sorry, did I offend you? Would you like a lolly pop? Orally or anally?

first off you dont buy p&p heads, you send your head off to like rs, portflow, etc etc. better to have them do it then do it yourself. if skunk2 sells one for the d series than i would buy that.

eagle rods huh, idk about that. then again if you only want to push 18psi which will probably put you at like 300whp which then will probably only put you in the mid 12s on street tires. up to you

So if i rebuild and sleeve the block and rebuild the head will that make a D16 be able to handle 18 psi on a T3/T4 turbo? And how benificial would it be to have a p & p head?

depending on what parts you use in the rebuild it may or may not handle.

a p&p head will allow you to flow more air, its kinda like p&ping you head will allow you to reach your hp goal at an earlier psi and it will also help raise yoru powerband alittle.

yea if you plan on running high amounts of boost, u need better rods and pistons, a stock d16a1 can handle 10 psi MAX, my buddy was running 7 psi for a while, turned it upto 10 for a bit (with tuning and proper computer) and the motor was too old and blew it/ lack of oil

most i've seen is 28 psi on a d-series.... DOHC ZC to be exact... which is what i'm building mine to handle, only a grand into internals and u'll be well over the 300 hp mark

so if i gota p&p'd head and had high boost would that be better or worst for the reliablity of the motor? Im going to replace the valves, springs and retainers. i dont want high hp at low boost. i want high hp at high boost. and if i get more hp with a p&p'd head that would be straight.

i dont want high hp at low boost. i want high hp at high boost.

why :screwy:

a p&p head wont decrease liability

the reason i want high hp at high boost is because i was kinda getting outa the tuner scene for a lil while. once i blew my head my friend bought a S2000. If i dont have any other car in my life i want that car b4 i die. i've been sayin that since 99. but once he got his S2000 and i rode in it, it made me want to keep my CRX and make it fast. because i forgot how much fun it really is. i figure to make me get head over heals again for tuning i want a loud turbo when it spools. i've heard turbos over and over. the sound of a big turbo with high boost is off the chain. its on thing to have an ave turbo with a lil boost. but when you here the turbo spool up loud and the bov is loud too its a whole new world. atleast to me. call it how you may but thats what i've come to find out about turbos. and thats what i want. im not goin to drive around with 18 psi all the time just to hear the turbo (its not even like im worried about other ppl hearing it or racing all the time...i want to hear it) but when i have a need for turbo i wana be able to boost the hell out of it and hear it. ya feel me?

why not boost 18psi all day long if ur motor can handle it?
like i said, my buddys motor handles 28 all day long

I'm new to this shit, as far as hondas go, but I'm working on a similar setup. I've worked on supercharged ford/gm vehicles for years. Below is what i've heard from non professionals and professionals ...


Forget about the pistions. The pistons in a b series are fine. Above 9-10psi, replace the rods. That's the weak point. A p&p head won't do much. It may give you a few hp, but it works better in conjunction with other mods. The money is better spent on a new cam/set of cams. That will help you more in your quest. I think the sleves are a waste as well unless your planning on running over 15 psi. If your going over that point, might as well rebuild the whole engine. Studs, gasket, valve springs, shit like that are always recomened, no matter what level you're running at.

Just my 2 cents.

the only thing that the guy above me said is right was the fact that a p&p head will work alot better with bigger tb, intake mani, and a cam

dont get a polished manifold. ported is fine, but you want to have the little bumps and shit inside the manifold to help swirl the air so you get a better air and fuel mixture.