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Honda FRV ivTec revs?


Calm Chris
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There's a cheap one being sold, 50k miles, 55 plate drives okay.

It's been used as a family bus and it sort of ideal for me to use as the shite wagon for dump runs, work stuff and won't ever need cleaning :)

I do not know the engine, on the road it seems ok.

Odd thing being that I was going to make an offer until I revved the engine. In neutral, parked up it gets to 4,500 rpm and won't go any higher. I didn't look at the revs when I road tested it, but it didn't seemed to have any issues with revving.

So the question is, does the engine only open up revs above 4,500 rpm when on the road, as in the high range revs are somehow linked to being in gear?

It needs new brakes, some matching tread tyres (isn't it an MOT fail having odd tread types?), due an MOT in 10 weeks and likely it would be £2,800.

So any knowledge be it the revs issue, the engine or (if you want to fess up) ownership remarks. Thanks in advance.

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Think I've answered my own question:-

Wiki

The VTEC system provides the engine with multiple cam lobe profiles optimized for both low and high RPM. The switching operation between the two cam lobes is controlled by the ECU which takes account of engine oil pressure, engine temperature, vehicle speed, engine speed and throttle position.

Using these inputs, the ECU is programmed to switch from the low lift to the high lift cam lobes when the conditions mean that engine output will be improved. At the switch point a solenoid is actuated which allows oil pressure from a spool valve to operate a locking pin which binds the high RPM cam follower to the low RPM ones.

From this point on, the valves open and close according to the high-lift profile, which opens the valve further and for a longer time. The switch-over point is variable, between a minimum and maximum point, and is determined by engine load. The switch-down back from high to low RPM cams is set to occur at a lower engine speed than the switch-up (representing a hysteresis cycle) to avoid a situation in which the engine is asked to operate continuously at or around the switch-over point.

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I'm pretty sure it's as the wiki. Basically the engine in neutral won't max revs, the ecu takes the attitude that there's simple no point.

I guess the same ecu decides it's ok to engage 1st and smack the arse of the engine. I didn't have any problem with revs on the test drive, I might not of bashed the hell out of the revs, but I did test the gear box and acceleration- so I must have got close to max revs here and there.

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Not sure on the FRV to be honest, I know mine (and previous Type-Rs) would rev higher than 4500 when sat in neutral, but the part about VTEC not engaging unless pressure and temp is correct is err... correct.

I'd always (with no gauges) give the car at least 10 mins on normal, I.e below VTEC crossover (actually no higher than 4-4.5k for me) before putting my foot down and revving its arse to nearly 9k! :)

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That's the one, column gear change and handbrake to keep the mid area free for the middle front seat.

Weirdly the middle front and middle rears seats move back so you can have a staggered seating pattern a bit like (rear to front)

O O

O O ---->

O O

The back seats all fall in to the floor which gives me the same sort of loading as a car based van which was the reason for having it. It's a family bus car and due MOT in eight weeks and will need a few £100s spent to sort it out.

It won't need cleaning, it won't be cherished and if anyone parking dinks it I won't be outside swearing at them. Perfect, for now.

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