Hi let me just say how happy I just got a 1999 SI. The car is flawless, the only problem is that it has 95k on it. I want to use it for a daily driver/ weekend racer (drag/autox) I drove the car around today and yesteray for about 100 miles love it great car. I guess the owner before me put some kind of can on the exhaust. Im just going to have to leave it there untill i get a cat back system for it. The car is a blast to drive but I feel that I would get more enjoyment out of it with an extra 20 hp and some more tq on the top end. I have done some reading and I think that the only thing im 100% sure on to get is an AEM V2 intake, other than that i do not have a clue on where to start, Any ideas? BTW thanks in advance!

 

get a header to go along with that full exhaust and if money allows, get a clutch/flywheel-the stock units dont hold up too great.

 

Who makes a good header and cat back exhaust system for higher rpm power?

 

search...there are a million different header set-ups that you cant go with whether you want top end power or low end power. it also depends on your budget.

personally, i would go with a jdm 4-1 header with custom piping and no cat.

 

if its a stock clutch you might want to get a new one. Si clutches are weak and will wear out quickly

 

yeah im not sure if it is a stock clutch or not but it is not slipping at all. I will just end up driving on the stock clutch untill it is slipping. BTW does every one think getting 20 whp out of this car will be a reasonable goal? AEM V2 intake, 4-1 header (what brand?? and model) and cat back exhaust (what brand and model) with high flow cat! Thanks!

 

First, congrats on the Si. I have had mine since 1999 and have really enjoyed the car. Good luck with it. That being said, achieving 20whp with just those modifications is not going to be likely. I would also consider seriously giving the car a once over if it is sporting 95K on the odometer. I don't care what the other owner did or did not do to it or if he is your long lost brother/sister, it's better to be safe than sorry and have everything checked out. I would even go a step further before installing any aftermarket parts and replace some normal wear items or see if they already have been. The water pump is one part inparticular that comes to my mind. Honda recommends that it should be replaced on or around the 80K mile point (which is surprisingly accurate from what I have seen) so see if that has already been done. The clutch is supposedly to be able to hold out until 100K or so, but I replaced mine about 2 months ago after having the car for over 5 years and with almost half the miles you do. If you are pushing 95K on a 5+ year old car and you know for a fact the clutch hasn't been replaced I would invest in some piece of mind and purchase a new one first. You could pick up a good aftermarket clutch and flywheel combo when you do since you plan on doing modifications to the car (I have a Exedy Stage 1 Clutch and a ACT Prolite flywheel and I love it.)

If you are really wanting to make power without going forced induction, building the cylinder head so it breaths better is what its all about. Some simple headwork, camshafts, cam timing gears, and some sort of tuning device be it a Hondata, VAFC, or chipped ECU can get you closer to that goal of 20+whp (along with your previous mentioned changes.) Headwork is not necessary but at the very least, camshafts should be your biggest upgrade. Adding a intake manifold and even boring your stock throttle body out is something else to consider as well.

This is bearly scratching the surface and it would really help if you ran searches on all of those things and read about what experiences people have had with certain products. I would also get in touch with a reputable shop that specializes in this and talk to them and let them know what you want to do. If you really want to stay all motor with the B16 and just want an additional 20 to the wheels then tell them that and ask them what they would do to get there. I would also tell them how much you are willing to spend as well so you can get any issues regarding that out of the way at the start and so you can gauge how much it will really cost you. Your first priority however, should be just making sure the car is in good shape for having 95K on the clock. Good luck with it and see you around.

 

thanks for the reply, It is currently in the process of being looked over. Were also checking to see if it needs a new timing belt and at the same time if it does were going to replace the waterpump. When/if i get a new clutch i will get a new flywheel i think some where around 9 pounds would be great from my reading. I dont know if i want to go with the cam rute as cash is some what limited right now unless my prices are wrong, (AEM V2 intake 240+/-, Cat back exhaust range 500-600, header 300, intake manifold 300?) Thats already roughly $1440 unless my prices are wrong. BTW i am a little sketchy on the idea but what about running a 35 or 50 wet shot? How well do these cars take a 35-50 shot?

As far as "old parts" that are robbing power than that of a new motor what should i look for? Cracked plug wires, clogged cat.. the basic items. yes i know im sure the motor isnt at its peak compression wise but i do not want to go ripping apart the motor.


Modified by Chriscorv5 at 3:17 PM 11/29/2004

 

Bump

 

Take a look at my setup, this will give you some good ideas on a path to go.
https://honda-tech.com/zerothread?id=1145882

 

I really wouldn’t run nitrous on an engine that’s got 95+K miles on it.

That being said...

I too have an Si. Mine an 00 though. I’ve had it since it has 7 miles on it in March of 2000 and have loved every minute of it.

A few things to check:

All the belts
All the pumps (my oil pump dies at 93K miles and I threw a bearing, hence the engine swap)
Compression (have a compressions check done to all the cylinders)
Transmission - B16 trannys are notorious for having grinding synchros especially in 3rd and 5th gear.

As for getting 20WHP out of I/H/E... fat chance. You aren’t even going to see 10 WHP off of those mods, sorry. That’s just how the B16A2 works.

You are going to want to get that afore mentioned I/H/E as well as a high compression head gasket (spoon, mugen and cometic make great examples), cams (Buddy Club Stage 3+ or Skunk 2 Stage 1s are a good bet, id go for the BCs though), cam gears, Hondata/uberdata ECU, and an upgraded intake manifold w/ port matched ~65mm throttle body. THAT should get you 20+WHP if you have it tuned properly with a wideband and on a dyno. It would also make your car much more enjoyable to drive. The lack of torque that the B16 puts out stock really hurts the fun factor.

And for that AEM V2 you are so set on. WASTE OF MONEY. Don’t bother. Seriously it’s just a filter on a stick. The difference between an ebay intake and a top of the line super forced cold air venturi carbon fiber JDM omgthatssobadass intake is like .8WHP. If you want something that looks great, and will net you the most HP, look into getting the passwordJDM.com J's racing style carbon fiber intake (@160 bucks it dynos higher then the AEM and costs 50 bucks less), or just find a used AEM CAI in the for sale forum and replace the filter element.

If you need a new clutch, Id also suggest replacing the clutch AND flywheel at the same time. Your engine makes no torque so don’t get something super light. 9-12LBS is perfect. That’s plus an Exedy full face organic clutch will work out very well for your application.

Let me know if I can help out more.

-joe

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Chriscorv5 &raquo;</TD></TR><TR><TD CLASS="quote">Who makes a good header and cat back exhaust system for higher rpm power? </TD></TR></TABLE>

any exhaust and header will et you more power up top. Theres very little you can do to this engine in order to make and decent low end power short of nitrous, FI or increasing displacement.

I really REALLY like my RS*R EXMAG cat back. Its one of the only exhausts that dont sound ricey and farty when hooked up to a stock internaled N/A B Series motor. The other exhaust I was considering is thw T1R model. Its a straight through design, so it will be much louder, but the quality id gret plus its one of the only true 2.5" (inner diameter) exhausts for out cars. This is probably overkill for your application though.

 

congrats on the SI dude. the 99-00 si's are somewhat of my "dream car" , but I just cant afford it . But other than that, 20whp with bolt ons, thats pretty iffy. I say buy yourself a stroker kit from crower, bore it, port and polish it, and youre set

 

a good way to make decent power on that car..... get a ITR head complete... get a new timing belt if your gonna be down there.... get either a 99 JDM itr ecu or hondata (and tuning ) get a JDM itr 4-1 itr header with full 2.5 piping or if money allows it .... run a SMSP,hytech,pro-fab or something of that nature. Get a filter on a stick and i bet you if the bottom end is healthy you will be knocking on the 180hp to the wheels door!!!

too make some money back sell your b16 head