I have a 90 integra b18a1 all stock and I was wondering if i put a aftermarket intake manifold on it if it would gain any power? I know it won't be a lot but I don't like the way the PGM-FI sticks out and looks like ****. Is there any manifold that someone recommends for a direct replacement?

 

Maybe this is old fashioned or just wrong but I think of an intake manifold as complimenting a planned build and not really as a good standalone or first mod. I think it is probably not an important restriction on an otherwise stock engine. Of course you could say that about any part, really.

 

You could upgrade to the 94 and up integra P75 intake manifold. Google to see what it looks like. It might also give you a couple hp, but nothing crazy.

 

I'm not to worried about it I was just wondering if it would be worth my time. It was just a thought

 

Unless you have the ECU Map tuned for it, no you wont get a increase in HP. The stock ECU has set parameters it tries to maintain, it will pick up the increased air flow and fight it to maintain its stock mapping.

If tuned with it, even on a plain jane stock engine most any aftermarket intake mani should have some increase.

 

It doesn't "maintain" anything at WOT as it is in open loop.

 

Id say when complimenting with other parts then youll see gains. But by itself you wont feel much if anything on the butt dyno.

 

Maybe not at WOT, but if you drive around at WOT everywhere you wont have a licence very long lol.

 

The most simple answer to your question is no. Like stayed in the this thread, it's more of a complimentary item not a bolt on and boom your making more power.

 

That's what I figured. I was just wondering if it was something to consider for a first upgrade. Anything you guys recommend as far as bolt ons? Or should I got straight to internals and head work?

 

I will take some flack from some people for saying this but IMO it is not worth spending any money to go NA on a B18A unless you are going to be adding a VTEC head. I totally understand that some people like the idea of a non-VTEC N/A build and for those people I say go for it, but for just a regular person who needs to think about price/performance VTEC all motor or better yet turbo is where it is at.

Another thing to think about is an LS/VTEC conversion is pricey but where else are you going to find an NA mod that adds 30+ whp? ANOTHER thing to think about is how much of the money you spend on LS/VTEC could be put towards a turbo instead?

If a long-term $2k+ build is completely out of the question and you have to pick away at your performance upgrades, a header and exhaust is a good place to start. Even untuned you will pick up a few hp and get some shiny bits under the hood. A GSR, ITR, or B16 transmission is an even better way to start and it requires zero tuning to run perfectly, although you will have to make some modifications if you get a "hydro" transmission. After that you should really make a focused plan about the kind of power you want, the kind of money you want to spend, and the amount of time you want to take with the build, so that you can make efficient decisions.

 

Imo building an NA LS engine is only worth it if you have plans to boost said na ls engine with a power goal that isnt overly costly or difficult on an ls head

I wont be boosting mine for another year or two and I didnt want a pig out of boost so I built a 10.7:1 bottom end. Plans are boosting it to around 350-380hp with my ported and cammed head. I coukd easily do it with a stock cammed head but I can do it easier with the cammed head


Btw if I was sticking with na, I would ls vtec it in a heartbeat

 

What is your build? Pistons rods head work? I was thinking of an ls vtec but for the money I can boost it and make more power. I was thinking about what rods and what cams to use and there's so many out there that I have a hard time choosing

 

Srp 81.5 10.7:1 compression pistons
Eagle rods
Ls block
Ls crank
Pr4 head
Mild port work
Rocket motorsports springs
Jge 303 cams, .417 lift 274 duration
Stock intake/tb (eventually gonna use a skunk2 pro2 manifold)
Dc 4-1 header rigged up to a 3in exhaust (the exhaust is for when its turbocharged but it works fine anyways)
Hondata s300
Fidanza flywheel 7.5lb


Right now its on a bone stock head till I rebuild the ported one. The compression bump and lighter flywheel really woke up the engine though.


How much power do you want and how deep are your pockets? 300 can be had with a bone stock ls head and forged internals and be a reliable daily if its tuned good

 

Isn't the Hondata s300 obd1??

 

Yep, its obd1

 

How is it obd1 mine is obd0

 

Obd0-obd1 ecu conversion harness. I also soldered an obd0 harness to an obd1 distributor

 

Every tuned honda these days is running obd1 ECUs.

 

Not every one. Bre and turboedit do just fine on OBD0.