power loss?

[fabian0]

my ride: '98 integra vti-r (dc2)

mods: i/h/e

Intake: Custom SRI
Headers: X-Force 4-2-1 headers
Exhaust: Custom 2.25" catback with Tanabe Medallion straight through muffler

I had a VAFC2 installed and tuned and dyno sheets show 120hp atw.

with the engine rated at 170bhp, what else can be contributing to the power loss?

any other simple mods to recommend?

cheers

PS: when i had the dyno done, my car had a MagnaFlow High Performance muffler with 2.25" inlet and 1.34" outlet. Weird as it is, although it has a 4" huge muffler tip!!! That's why i had it changed to the Tanabe muffler but not dyno-ed yet.

[FastFwd]

What engine fabian? b18c or b16a? and how much Kms on the motor?

Also you have to remember a 100,000+ km car wont have no where near its original HP rating as it once did from factory. Usually putting exhaust, headers and intake will bring it back to its stock hp rating.

[fabian0]

What engine fabian? b18c or b16a? and how much Kms on the motor?

Also you have to remember a 100,000+ km car wont have no where near its original HP rating as it once did from factory. Usually putting exhaust, headers and intake will bring it back to its stock hp rating.

sorry i didnt mention that it's a dc2. b18c2 engine. over 170k's..

yea so with i/h/e done, what else can be done?

[FastFwd]

yeh but over 50% of the people in here have done engine swaps.

I mean you can do alot of NA work to it but your still going to have to rebuild it to bring it back up to its original specs. I would say first get your exhaust finished from header to cat. 2.25 all the way through and do a major service. Radiator/engine flush, oil change, oil filter, oil breather, plugs and maybe some better iginition leads.

A good service can go a long way.

[fabian0]

yeh but over 50% of the people in here have done engine swaps.

I mean you can do alot of NA work to it but your still going to have to rebuild it to bring it back up to its original specs. I would say first get your exhaust finished from header to cat. 2.25 all the way through and do a major service. Radiator/engine flush, oil change, oil filter, oil breather, plugs and maybe some better iginition leads.

A good service can go a long way.

yeap it's 2.25" all the way through. i think it's still got a stock cat. alot of difference with a high-flow cat?

currently with Denso iridium spark plugs. just had oil + filter change and coolant flush..

[FastFwd]

Try to stay with NGK for plugs with honda as thats what they cam with and designed for. But yes if it has a stock 1.5" cat then i will say you will need to change that to a 2.25. Or do you mean a stock 2.25 as in just a normal cat? high flow does make a diff but not huge in a NA car.

[VTECMACHINE]

Also you have to remember a 100,000+ km car wont have no where near its original HP rating as it once did from factory. Usually putting exhaust, headers and intake will bring it back to its stock hp rating.

Not true. An NSX motor, makes more power with an older motor (Obviously not super old, but from around 70-120K Km's). Honda made the claim, and BMI tested it, and it's true.

[FastFwd]

Not true. An NSX motor, makes more power with an older motor (Obviously not super old, but from around 70-120K Km's). Honda made the claim, and BMI tested it, and it's true.

Ok dude nsx is a completely different type of car. they have been built to thrash and 70-120 thou isnt really alot of k's. Remember the this car new was originally around 100 thou in 91. So the amount of engineering put into this production line would have been huge.

but for the other 95% of people in reality more km's on the car eventually means less hp, this is common sence. A full service, tune and some cleaning up with bring it back up but it wont get it to its stock value hp.

[dc5s]

Ok dude nsx is a completely different type of car. they have been built to thrash and 70-120 thou isnt really alot of k's. Remember the this car new was originally around 100 thou in 91. So the amount of engineering put into this production line would have been huge.

but for the other 95% of people in reality more km's on the car eventually means less hp, this is common sence. A full service, tune and some cleaning up with bring it back up but it wont get it to its stock value hp.

Agree, you can't compare the engineering of a NSX to a Vti-R, though I can see why you made the comparison. FastFwd is correct in saying that based on what the OP has given us, it appears he may need to do a full service, though other variables could come into play.

[45SET]

So car was dynoed tuned at 120hpatw?

Where did you the 170hp figure from?

[CoupeTurbo]

stock flywheel hp ^, i would assume.

[45SET]

If thats the case...

Drivetrain loss would be the main issue (As the 170hp is measured from the flywheel), and old age... 170k KM takes a toll on any engine.