kettler

Hello and my and first post!

I live in Switerland and have a Honda Accord Tourer, which is an American Acura TSX - albeit a station wagon.....

I am thrilled with the car, but am extremely disappointed withperformance at the top end - 120mph plus. The diesel verion here tops at 209kph and mine (190hp 4 cyl) at 212kph/133mph.

I simply need more top end. Simple. I am tired of diesel 3series passing me....

Can someone recommend a decent mod?

Thanks!

AlterZgo

Hondata?

Check out this thread:

https://acurazine.com/forums/showthread.php?t=22990

tekn0mage

I SERIOUSLY doubt Hondata has an application for a car made for the Swiss market.

How much top end do you want from a 2.4 liter 4 cylinder?

kettler

I'm happy with 18kph/11mph more..

When 320d's get in the 220kph range....
When Honda's (Acura) own sedan gets 227 (difference is drag I know), then surely some more top end is possible! There are a dozen cars I can think of, with similar 4 cylinder specs (gas engined) that wipe me up high.

kurt_bradley

Chipping will do nothing when it comes to the TSX's top speed. I have achieved 144 and it is DRAG limited. Not redline, not governed electronically, but drag limited. You hit the wonderful wall of wind and you can't go any faster. There isn't really much more one can do about drag in the TSX. It's the slickest (when it comes to Coefficient of Drag) in the Acura lineup.

hondata

Check the serial number on your ECU. I think it is RBG-E020 if it is a manual transmission.

A good start would be our reflash, a cold air intake and a header. Should add something like 20HP from 5500 rpm up. If you want significantly more top speed you will need forced induction - for which there is no good engine management at the moment.

jiggaman

insert plea from stokeless for K-PRO

AlterZgo

LOL. Did you read the thread I linked to? It was started by Hondata and it was titled, "News for International Accord owners about the Reflash."

AlterZgo

Huh? If you increase hp and torque, it will increase the top speed of your car. The Hondata reprogramming itself may not increase it a significant amt, but it should still help as it noticeably increases the area under the hp/torque curves.

Greater power allows you to overcome the wind resistance. This is why a Porsche 911 turbo has a higher top speed than a non-turbo 911 which has a lower drag coefficient thanks to the narrower body and lack of a rear wing.

DaveWhyman

Top speed is fine and all, but at that speed the engine would be running around 6000 rpm. I don't think it was designed to hold that for hours on end (think cooling, etc). I'd hate to think of the Fuel economy too...There needs to be another gear to cruise at that speed.

hondata

Honda's test engine procedure is to run the engine at peak power for 400 hours, then at redline for a further 100 hours.

A little while at 6000 rpm while be no problem. If 6000 RPM is around the current top speed, then the TSX Reflash will make a significant difference as that is where the most power is gained.

al8818

Top Speed is tied to gear ratios as well as more power. I am not sure what gear ratios you have compared to the TSX but it is possible that 5th or 6th gear misses peak power coinciding with top speed.

If the 6th gear is really there to cut engine rpms when cruising, then 5th may need to be taller a bit to reach top speed with the newfound horsepower.

I have a Euro R CL7R and have found that neither 5th or 6th quite brings peak power (rpm) to correspond with top speed. Like 5th a little too low and 6th is a little too tall.

In general the European versions of the Civic Type R and Accord Type R seem to have gearing that brings peak power rpm closer to top speed than JDM versions. Increasing power may not necessarily get you more speed unless you can also extend rpms as well. 6th gear may be too tall to get the power to beat the drag.

I dont know just what your european Accord ratios are so maybe you can post it.

AL

al8818

Oh yes, and include your tire size and engine power and at what rpm, and final gear ratio please, along with all 5 or 6 ratios so I can calculate. From my own info, your top speed is attained in 5th gear which is 223 km/h. This is the 200 PS European Accord 2004