Which engine is better for a turbo?

[CDubs]

First off, i did use the search button, but could not find this all in one thread, or the answers I;m looking for really.

I want to do a turbo for my 93 EX coupe, and someone told me that the DOHC will blow easier than the SOHC. I was thinking of doing a B16 swap and the autoworks turbo (since it's cheap and well likes around here). But would it be better to just keep the D16z6 and rebuild it (170,000 miles on it) with forged internals?

So long question short, which will give me more power, less likely to blow and better since this car is my daily driver, except in the winter.

 

[CDubs]

also has ony one seen/used this kit...i just stumbled across it on google

http://www.advancedjdmparts.com/product.php?productid=16865&cat=290&bestseller

 

[afoss]

also has ony one seen/used this kit...i just stumbled across it on google

http://www.advancedjdmparts.com/product.php?productid=16865&cat=290&bestseller

Its a ebay kit....

 

[Kensai]

Go with b18 not b16, no replacement for more displacement. No, dohc will not blow easier than sohc, it will make more power though. And that kit is junk, check out go-autoworks or spoolinperformance for quality kits.

 

[CDubs]

ok and anrt the b18 lover 3k? i found a site with a b16 with tranny axels, everything it needs for 2100 and then the autoworks turbo for 1200 (or so dont remember off the top of my head) so its within (or close to) my price range so then i can add new pistons, cam gears, cam shaft to it later on

 

[DarkCreep]

WTF is up with all these n00bs having some dumb ass friends??


Who ever told you SOHC is better than DOHC, tell em to kill themselves.

 

[Kensai]

An LS longblock costs about $700-800 at hmotorsonline.com you'll need a tranny, axles and ecu for it though. But in the long run it will make more power than a b16. Go-autoworks.com kits start at around $2,000 and that's without any sort of fuel management. The one you're looking at for $1200 is probably a knock-off. You can also try to piece together your own kit and save some money but you'll have quality parts. The only thing you can get from ebay is probably an intercooler and piping, everything else you want to be reliable.

WTF is up with all these n00bs having some dumb ass friends??


Who ever told you SOHC is better than DOHC, tell em to kill themselves.

I don't think you should be calling anybody a noob, you have an eBay turbo kit...

 

[XpL0d3r]

There is POTENTIAL for a sohc to be better.. but eye for an eye... there's a reason people do motor swaps, and other than Sady you won't find too many people who swap a sohc into a car that had a dohc...

 

[2NRSTV]

Actually, the D16 has the potential for more Torque than the B-Series. Given the fact that the Stroke for a D16 is almost 3mm longer than a B18 and almost 13mm longer than a B16. If you guys have taken any formal training, you guys would probably agree that at least theoretically, if the D16 and B18 had the exact same HP output, the D16 would have more Torque. And, of course, the D16 with a longer stroke would have a lower RPM range, so Peak Power would be realized at an earlier RPM. Actually, I think this has already been proven.

P.S. That turbo kit is poo poo.

 

[Kensai]

It takes more work to get a D-series to have the same power as a B-series. Yes, it MIGHT have more torque, but it will take more work and more importantly money to get it to that point. I think what you're trying to say is that a D-series can be a good motor to boost, but don't be throwing out misleading statements saying that it will be better than a DOHC.

 

[got traction]

the best bang for your buck would be to turbo the d series. The Vitara build is common, and pretty damn cheap.

 

[CDubs]

WTF is up with all these n00bs having some dumb ass friends??


Who ever told you SOHC is better than DOHC, tell em to kill themselves.

yeah that kid owns an STI and apperently thinks he knows everything so time to prove him wrong,

Kensai - i didnt even think of that idea of the LS long block if i can piece one of those together that owuld be great then ill ask my local shop to look around for a block, since he gets a lot of civics in there hopefully someone wants to swap it and i can pick one up and start from there, if i cant find anything by the end of the summer i think i might just go with the b16 though so i can swap it out in the winter while i drive my SUV and th EJ sits in the garage for the winter

 

[2NRSTV]

I didn't say that the D-Series is better than the DOHC. I said it has more torque potential. But good lookin' out. Don't want him to think I was saying it was better. And yes, it will take more work and money to realize the same HP numbers as a B-Series. But what I was saying is, given the specs of both engines, it should be more than obvious if both engines had, say, 250HP, the D-Series would be on top with more Torque and a lower RPM Range.

So here's a little Auto 100 for you guys so you can make informed decisions on your builds..
Physics says that a longer lever equals more torque and a longer stroke means a higher offset Journal from the center of rotation. It also means that the D-Series will have a lower effect RPM range. And as most of you know, HP=TorquexRPM/5252. A shorter stroke means a Higher RPM Range, but potentially higher HP. Think of the S2000 with 240HP and 150Lbs. of torque ( sad torque compared to HP) with a 9K RPM Range.

 

[Faisalicious]

i was exactely like you, didnt know where to go but i went with my D16Z6, i got me a vitara pistons and eagle rods, it was cheaper for me, and im happy with my choice ..wish you luck bro

 

[Kensai]

I didn't say that the D-Series is better than the DOHC. I said it has more torque potential. But good lookin' out. Don't want him to think I was saying it was better. And yes, it will take more work and money to realize the same HP numbers as a B-Series. But what I was saying is, given the specs of both engines, it should be more than obvious if both engines had, say, 250HP, the D-Series would be on top with more Torque and a lower RPM Range.

So here's a little Auto 100 for you guys so you can make informed decisions on your builds..
Physics says that a longer lever equals more torque and a longer stroke means a higher offset Journal from the center of rotation. It also means that the D-Series will have a lower effect RPM range. And as most of you know, HP=TorquexRPM/5252. A shorter stroke means a Higher RPM Range, but potentially higher HP. Think of the S2000 with 240HP and 150Lbs. of torque ( sad torque compared to HP) with a 9K RPM Range.

I was talking about xploder... I'm not arguing whether a D-series will or will not have more torque at a certain point, I'm saying it will take a lot more to get it there. Just think of it this way, if you throw on the same exact kit with the same exact tune on both motors, the B-series will come out on top. Sure if you add a few more PSI to the d-series it might have more horsepower and torque. But a B-series has MORE POTENTIAL.

The point being, if you're on a budget, it's fine to boost your d-series it will work just fine. On the other hand if an extra few hundred dollars is not an issue for you, b-series is a better choice with more potential to grow.

 

[Indy_Civic]

your wallet will blow up easier if you blow up a b-series over d. Other peoples doors will blow off easier if you go b over d too.

 

[2NRSTV]

Yeah, agreed.

 

[CDubs]

yeah thats y i want a b...i want to autocross it with a local state club and they go to Limerock in CT and some other tracks in Jersey, NY, and Mass so i want that extra power for that so Im not the slowest one around haha

 

[2NRSTV]

I'm not sure how long the straights are on your AutoX tracks, but if they're as tight as Monterey, CA AutoX Courses, power should be the second thing on your mind. Cornering Capability should be first. Like I've posted before, I was 3 seconds faster than an EVO VIII on my last run with my Civic not because of power (D16Z6 with minor mods), but because my suspension setup was good. I mean, how much power will you need to pick up speed when you already refuse to slow down for the corners?

But then again, it also matters what class you want to be in. Are you running SCCA? I think with a B-Swap, they'll put you in the DSP class anyway with the GSR Tegs. A SOHC Civic would be in the FSP with the other SOHC Civics and DA Tegs. Usually, if you have a stock engine with a bolt on turbo, they're usually nice enough to let you stay in the Street Prep Classes. Usually for Swaps with Turbo, they'll stick you in the Modified Street Prep Class with supercharged Miata's, so you'll be slower either way... lol ^_^

That's how it is where I'm from. Probably be different over there. You might want to check to see.

 

[CDubs]

valid point, the AutoX is tight but i plan on gettin some form and function coilovers, strut bars front and back, control arms, lower tie bar and some sway bars, and a b pillar bar (harness bar) so ill have that going for me but the swap and turbo come into play on the real tracks, and i will look into that though, its not really all about winning but if i can win with a bolt on turbo with the D series then i might stay with that now that really gives me something to think about haha thanks 2NRSTV...now i have more thinking to do, with finals coming up my brain is going to blow up