this guy i know bought a b18a, sold his b16a or b18c1 , not sure which he had,and slapped turbo on the b18a, is this better then putting it on a vtec, whats the advantages?
B18a/b run a lower compression but other than that, there’s not many advantages over vtec motors
Originally posted by Ray
B18a/b run a lower compression but other than that, there’s not many advantages over vtec motors
Yeah there is…you get a ton more torque…
B18As are cheaper than B18Cs and therefore you will have more money to spend on turbo parts;)
this is kabir’s (lsturbo91) dyno of his bone stock b16 vtec motor with turbo at 11psi:
he’s making 272hp/198tq. give him an extra 0.2L of displacement (ie b18c motor) & you’d easily be able to add +25hp/+20tq
to those numbers.
Originally posted by qwkteg125
this is kabir’s (lsturbo91) dyno of his bone stock b16 vtec motor with turbo at 11psi:
he’s making 272hp/198tq. give him an extra 0.2L of displacement (ie b18c motor) & you’d easily be able to add +25hp/+20tq
to those numbers.
If this was a B18A putting out 270hp it would be putting out over 250ft lb torque
My turbo B18A puts out 40 hp less than this VTEC motor but gets 20 more ft lbs of torque
Torque is what makes a car feel fast…
hey man don’t wanna get into this argument with you again, but…
it’ll take more boost on an ls to reach 270hp than with a vtec motor. in the 1/4mile & beyond, lsturbo91’s 11psi on his b16 will pull away from your ls at 11psi.
here’s a dyno of a bone stock turbo ls motor (motor tuned by st00pid from clubsi fame): 294hp/272tq
now this motor will run kab’s b16, but it’s also boosting 20psi & sippin c16 to make this power.
don’t get me wrong, the torque of a turbo ls motor is nice (i should know i used to have one) but a vtec motor will always outpower it all else being equal (boost level, displacement, etc…). i’d still rather boost an ls motor vs a b16 motor just for the increased torque, and for a daily driver you can’t go wrong with a turbo ls. but once you get into the b18c or ls-vtec setups the torque advantage of a full ls motor will mostly be negated due to the motor’s similiar displacement figures, and the ls will be left far behind in the hp department. like i’ve said all along, take a look under the hoods of the fastest hondas & you’ll see a familiar theme: vtec motors.
you still probably don’t agree with me, and that’s fine. let’s keep it civil & agree to disagree 
Did you get those Dyno graphs from Honda-tech.com? Cause if you did, I could have sworn that those numbers are for a B18A not a B16A.
the fastest turbo civics are running no-vtec
Originally posted by bryan305
the fastest turbo civics are running no-vtec
Yup, they’re VTEC MOTORS with the vtec disabled.
As for the argument above, are we talking about displacement or vtec. If I were to choose from a B20non-vtec vs B20vtec (same displacement) what would you pick?
I hope this topic stays cool 
I’m just not comfortable with how people piss on us nonVTEC guys just because it’s not the popular thing to do. With todays plug and play options that weren’t available a few years ago a nonVTEC motor is just as good as a VTEC motor, beter even in my opinion.
Some day it would be interesting to spend some time at a track and really get some good numbers, not just bench racing with dyno charts…
blackteg, the b16 chart is from h-t:
byran, ray is right. the vtec solenoid is usually disabled on the single digit racecars. but the rocker arms are locked so that they are essentially running in vtec the whole time (using the big lobes of the cam). they use the vtec head for it’s better flow & much more stable valvetrain.
hey ray, the guys at toda told me that some racers are running their all-motor cams in their turbo racecars…crazy stuff
If you guys are bored…
Here is 3 pages about this topic.
It isn’t fair to compare a B16A and a B18A with the same boost level. The B16A already starts with 20-40 more Hp depending on the year engine. Plus, a B18A will accept more boost than a B16A anyways. But I have to admit, the idea of revving to 8k with 250+ Hp does sound fun, even if it does have less than 200 lbs of torque… everyone will have their own preference.