52mm throttle body

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216secoupeessex
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52mm throttle body

#1 Post by 216secoupeessex » Wed Oct 10, 2018 12:31 pm

Hi guys I have a 98 K series 1600 Coupe.

I am debating on some gradual upgrades as I am not sure on keeping the car as is, lightly modifying or getting rid and save up for something else.

The car has 70k on the clock and absolutely no rust or welding done.
I have fitted gas shocks and am toying with a a TB upgrade - is it straight swap unbolt one, bolt in another?
Also since the new shocks I have noticed the ride height - I dont want to lower too much, have been told zr\s springs are the way to go?

Lastly would a vvc upgrade be worth doing - think I saw once that someone had done it and the output went up to about 133Bhp - I would have to pay someone to do that as its way too big a job for me.

Thanks
Neil

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Re: 52mm throttle body

#2 Post by Cromp85 » Wed Oct 10, 2018 3:24 pm

If your car is rust free its worth holding on to. To clarifiy what mg springs to use, it is ZR 160 front and Any ZS hatchback rear. If you had a ZR 160 VVC engine fitted it would give you about 158bhp :D
My Rovers to date:
1994 Rover 220GSI in Tahiti blue (On the road)
2002 MG ZR 105 in Solar red (On loan)
1995 214i (On SORN)

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1234dist
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Re: 52mm throttle body

#3 Post by 1234dist » Wed Oct 10, 2018 4:31 pm

Stock is king for price at the moment. Even none standard wheels are putting people of and let’s be honest, it doesn’t take people much to be chopping hundreds off the price.

As stated, if it’s a keeper and the next owner is the scrap man, knock your self out!

As far as the vvc engine is concerned that’s up to you. If you feel the power to pound and effort still leaves you in the plus column, go for it but have a contingency should things go wrong and don’t think you can just knock it out in a weekend and drive to work on Monday.

Read forum posts from people who have done it and make sure you have a good qty of replacement bolts.
Pastor @ Rover Revival NFP Garage
220 Coupe turbo K785OAT
218 VVC Cabriolet R220OVR
Mercedes C270 diesel P80CJM
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Re: 52mm throttle body

#4 Post by JOHNDQ » Wed Oct 10, 2018 7:51 pm

TB is a waste of time and from my experience a increase in power a complete myth. The 160 is a great engine but it needs revving to max rpm to get the benefits it's not real improvement on the 1.8 120 at low/mid rpm. If you want to do it best of getting a ZR with a rotten body because you'll need the loom, ECU, 4-2-1 exhaust, front sub frame etc etc and in all honesty you will want the gearbox/linkage as it uses a lower ratio gear set and 4.2 diff. In terms of power I've never come across a 160 make the factory output but they are getting old now, the only one we got to 160 we put on a Emerald K6 and VHPD throttle bodies and made a lot more torque

https://youtu.be/J4qrdX4mtCY

216secoupeessex
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Re: 52mm throttle body

#5 Post by 216secoupeessex » Fri Oct 12, 2018 11:00 am

Sorry guys I meant add the vvc mechs to a standard 1.6, not transplant the whole engine as that is way beyond me

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Re: 52mm throttle body

#6 Post by 1234dist » Fri Oct 12, 2018 3:22 pm

You would need stand alone ecu as all you furling and compression will be wrong for either engine.
Pastor @ Rover Revival NFP Garage
220 Coupe turbo K785OAT
218 VVC Cabriolet R220OVR
Mercedes C270 diesel P80CJM
620 SLI P267LOM HONDA

216secoupeessex
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Re: 52mm throttle body

#7 Post by 216secoupeessex » Fri Oct 12, 2018 4:29 pm

Damn is nothing simple :blink

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1234dist
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Re: 52mm throttle body

#8 Post by 1234dist » Fri Oct 12, 2018 6:26 pm

Image
Pastor @ Rover Revival NFP Garage
220 Coupe turbo K785OAT
218 VVC Cabriolet R220OVR
Mercedes C270 diesel P80CJM
620 SLI P267LOM HONDA

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Re: 52mm throttle body

#9 Post by The Origina lNom » Mon Oct 15, 2018 2:31 pm

The Zr 160 throttle body is bolt on and does make your engine feel more lively.
In terms of bang for buck its amongst the best £50 improvements that you can feel.
Give the engine a K & N panel filter as well and it MAY give you 5bhp. It doesn't sound a lot but for an engine that pushes out over 100bhp its over 5% difference.
The cheapest power mod is bonnet hinge spacers which cost less than a tenner including new, longer bolts.
These allow the hot air from your engine to escape under your windscreen and so cool your inlet manifold by the increased passing airflow.
15mm spacers fit.
Some people dont like the look this gives the bodywork because they think it looks like the bonnet is not closed properly but it does work.
Last edited by The Origina lNom on Wed Oct 24, 2018 12:47 pm, edited 1 time in total.

216secoupeessex
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Re: 52mm throttle body

#10 Post by 216secoupeessex » Mon Oct 22, 2018 5:00 pm

Thanks

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Re: 52mm throttle body

#11 Post by ROVER-25X » Sun Dec 30, 2018 5:01 pm

I had a 218 non-VVC Bubble that I fitted a 52mm TB to along with a cold air fed induction kit and a back box,
at a DYNO session it put out 120BHP which is stock power, still a good figure.
The 25X (2001 ROVER 25 1.4 Impression S, fate TBD)
The CX8 (1997 ROVER Cabriolet 1.6 K-Series, Resto Project)
The 25XD (2004 ROVER 25 2.0TD, Track Car ?)
The Parts Bin (2001 ROVER 25 1.6 S)
The ASTRA-DX (2012 VAUXHALL ASTRA 1.7CDTi, Daily Eco Driver)

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Re: 52mm throttle body

#12 Post by The Origina lNom » Tue Jan 01, 2019 7:03 pm

Interesting. Do you still have the dyno graph ?
I've always used the standard rubber air feeds and airbox in which I tried drilling a couple of small forward facing holes which gave me no further improvement.
I wonder if the throtle body gives more power before reaching peak power which comparative dyno charts might show.

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Re: 52mm throttle body

#13 Post by ROVER-25X » Sun Jan 06, 2019 8:51 pm

It was 7 years ago but you are in luck.

120.1 BHP at the flywheel, 88.8 at the wheels.



Image
The 25X (2001 ROVER 25 1.4 Impression S, fate TBD)
The CX8 (1997 ROVER Cabriolet 1.6 K-Series, Resto Project)
The 25XD (2004 ROVER 25 2.0TD, Track Car ?)
The Parts Bin (2001 ROVER 25 1.6 S)
The ASTRA-DX (2012 VAUXHALL ASTRA 1.7CDTi, Daily Eco Driver)

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