What are throttle boddies
Discussion
General definition:
A throttle body is the part that allows air into your engine. It is connected to the intake tubing and the intake manifold. Inside the throttle body is a circular valve that moves 'open and close' when you step on the accelerator pedal, or move the accelerator cables. On the side of the throttle body there is a TPS (throttle position sensor). What that sensor does is monitors how open the valve on the inside of the throttle body is, it then sends that information to the ECU. The throttle body allows air flow throughout the engine. Differing sizes of throttle bodies allow different amounts of air in.
The problem with standard Tuscan throttle bodies is that there's no bush/bearing in the design, causing them to wear.
Incidentally, my car which is currently for sale has the SFR uprated throttle bodies, which do have bushes, curing problems such as poor running at constant velocity, etc.
A throttle body is the part that allows air into your engine. It is connected to the intake tubing and the intake manifold. Inside the throttle body is a circular valve that moves 'open and close' when you step on the accelerator pedal, or move the accelerator cables. On the side of the throttle body there is a TPS (throttle position sensor). What that sensor does is monitors how open the valve on the inside of the throttle body is, it then sends that information to the ECU. The throttle body allows air flow throughout the engine. Differing sizes of throttle bodies allow different amounts of air in.
The problem with standard Tuscan throttle bodies is that there's no bush/bearing in the design, causing them to wear.
Incidentally, my car which is currently for sale has the SFR uprated throttle bodies, which do have bushes, curing problems such as poor running at constant velocity, etc.
Here is a picture of the throttle bodies.
I don't really know how the throttle pot's could be damaged by the throttle bodies,unless by constant movement due to wear. I had to have a new throttle pot on mine last year, although the throttle bodies/spindles seem OK despite having covered more than 22K miles.
Nick
>> Edited by NCE 61 on Monday 21st February 16:47
I don't really know how the throttle pot's could be damaged by the throttle bodies,unless by constant movement due to wear. I had to have a new throttle pot on mine last year, although the throttle bodies/spindles seem OK despite having covered more than 22K miles.
Nick
>> Edited by NCE 61 on Monday 21st February 16:47
Leadfoot said:
JSG - how much were the SFR jobbies?
£300 or so plus VAT, etc. (heard murmerings at the time of that being too cheap, but best to call & see - www.sfrengineering.co.uk) Biggest problem was the fitting time, however... you have to drop your car off there, have them made up based on your existing ones, then fitted. Was quoted a turnaround time of a week, but ended up taking three weeks. (Missed my car for some particularly nice early summer evenings/weekends
) Only other option that I know of are the Dreadnought ones, but you've either got to go up to Scotland or (I believe) Hexham for those. Haven't got a cost on them, I'm afraid.
But as my Tuscan, that's for sale, has them done already, the lucky purchaser will be saved that pain and can just get on with enjoying the car...
>> Edited by J_S_G on Monday 21st February 17:05
I asked SFR if they could mine (preventative) but they are just too far away and needed the car for about a week, there seems to be no-one in the Gloucester area that can do anything!!
PS- JSG, your Tuscan is fantastic, as someone who has already spent a small fortune on upgrades, I can appreciate the value of yours, and if this was a year ago, I for one would have snapped your hand off for your Tusc!
PS- JSG, your Tuscan is fantastic, as someone who has already spent a small fortune on upgrades, I can appreciate the value of yours, and if this was a year ago, I for one would have snapped your hand off for your Tusc!
chris watton said:
I asked SFR if they could mine (preventative) but they are just too far away and needed the car for about a week, there seems to be no-one in the Gloucester area that can do anything!!
PS- JSG, your Tuscan is fantastic, as someone who has already spent a small fortune on upgrades, I can appreciate the value of yours, and if this was a year ago, I for one would have snapped your hand off for your Tusc!
Cheers bud. Just hoping that the people out there that are looking for Tuscs now actually care about getting one that's been looked after in this way, and not just something flashy to show off in... it'd break my heart if someone ragged it from cold after all I've done!
OK, as I mentioned, I think SFR machines your current throttle bodies to make the new ones. So, in theory, you could purchase a new set from TVR, send them up there, and have him machine them & send them back... Worth a try asking? It made SUCH a difference to mine it was worth losing the car for a week over, though (three weeks was pushing it!) How much to get it trailered up there and back? Alternatively, if you've got AA cover, pull a couple of fuses out, claim it broke down, and get it sent up there.
Alternatively, give Dreadnought a call - it was almost a year ago when I was ringing around, etc. and things might have progressed since then. At the time, the only option was up in Scotland, or potentially in their "English distributor" (Hexham Horseless... wrong end of the country if you ask me!)
Hmm,, buying a new set of bodies 
I would 'guesstemate' that with the purchase of the new bodies, plus the £300+ for SFR to work their magic on them, that would come close to 1K, I would have thought, unless the throttle bodies are a lot cheaper than I think they are.
I am also about to order a spare set of throttle pots from TVR Power, as I intend to have these changed at every 12K service (only come to around £50 inc VAT for the two)
I would 'guesstemate' that with the purchase of the new bodies, plus the £300+ for SFR to work their magic on them, that would come close to 1K, I would have thought, unless the throttle bodies are a lot cheaper than I think they are.
I am also about to order a spare set of throttle pots from TVR Power, as I intend to have these changed at every 12K service (only come to around £50 inc VAT for the two)
I got the Dreadnought bodies for my S6 Cerbie done before it left Scotland with me. What a difference it made to the engine breathing at the top end of the rev range - whoosh!!! 
(Cost £600 all in)
Fab people the Luti's, always drop in their garage in Callander if your up that way. Don't try to beat Claire on the track she'll humiliate you in her racing Metro!
I think they tried to get TVR to include their ideas in the newer engines but I don't know what happened with that.
>> Edited by CiderwithCerbie on Monday 21st February 18:16
(Cost £600 all in) Fab people the Luti's, always drop in their garage in Callander if your up that way. Don't try to beat Claire on the track she'll humiliate you in her racing Metro!
I think they tried to get TVR to include their ideas in the newer engines but I don't know what happened with that.
>> Edited by CiderwithCerbie on Monday 21st February 18:16
chris watton said:
Hmm,, buying a new set of bodies
I would 'guesstemate' that with the purchase of the new bodies, plus the £300+ for SFR to work their magic on them, that would come close to 1K
It's a TVR... unless it's a full engine rebuild EVERY bill comes to £1k - you should know that by now!
CiderwithCerbie said:
I got the Dreadnought bodies for my S6 Cerbie
...
I think they tried to get TVR to include their ideas in the newer engines but I don't know what happened with that.
Likewise I heard that the SFR design was to be incorporated into the factory engines. That seems to have gone quiet, too.
J_S_G said:
Hmm,, buying a new set of bodies
I would 'guesstemate' that with the purchase of the new bodies, plus the £300+ for SFR to work their magic on them, that would come close to 1K
It's a TVR... unless it's a full engine rebuild EVERY bill comes to £1k - you should know that by now!
LOL, true, but!!!!,, my last 12K service was well under 1K, and that was with 2 new rear tyres in the price! My next 6K service is £460 (+ £45 for first MoT).
However, If and when I do have throttle body probs (as opposed to throttle pot), I will definitely have the SFR upgrade, I just sincerely wish I had decent people in my area who knew what they were doing a little more!
chris watton said:
Hmm,, buying a new set of bodies
I would 'guesstemate' that with the purchase of the new bodies, plus the £300+ for SFR to work their magic on them, that would come close to 1K, I would have thought, unless the throttle bodies are a lot cheaper than I think they are.
I am also about to order a spare set of throttle pots from TVR Power, as I intend to have these changed at every 12K service (only come to around £50 inc VAT for the two)
I thorght Dreadnought were doing them on an exchange basis might be worth a call.
Nick
NCE 61 said:
chris watton said:
Hmm,, buying a new set of bodies
I would 'guesstemate' that with the purchase of the new bodies, plus the £300+ for SFR to work their magic on them, that would come close to 1K, I would have thought, unless the throttle bodies are a lot cheaper than I think they are.
I am also about to order a spare set of throttle pots from TVR Power, as I intend to have these changed at every 12K service (only come to around £50 inc VAT for the two)
I thorght Dreadnought were doing them on an exchange basis might be worth a call.
Nick
How does that work, I have heard of 'exchange basis' before, but not sure exactly what that implies! (numpty!)
(TVR-Phoenix- you been on your home made nitrous???
>> Edited by chris watton on Monday 21st February 20:17
chris watton said:
I thorght Dreadnought were doing them on an exchange basis might be worth a call.
How does that work, I have heard of 'exchange basis' before, but not sure exactly what that implies! (numpty!)
Basically, an exchange basis should be... you give them your throttle bodies, and they give you a set of pre-prepared ones. Then the next customer gets yours, which'll have been sorted in the meantime, etc. etc.
Now, whether they'll let you post them up there, or only do them on the spot, or anything that doesn't involve long trips/losing the car for a week, who knows? I'd call them.
Thank you for that very clear explanation , I shall give them a call and find out if I can post mine up, and they post me the refurbed back, my problem is that I do not have a lot of time off work, and what little time I do get off, I don't want to be spending it on my car! (although today I had off to register my new reg for my Tam, S6 00MPH!!!)
Are the throttle bodies quite easy to remove and replace?
, I shall give them a call and find out if I can post mine up, and they post me the refurbed back, my problem is that I do not have a lot of time off work, and what little time I do get off, I don't want to be spending it on my car! (although today I had off to register my new reg for my Tam, S6 00MPH!!!) Are the throttle bodies quite easy to remove and replace?
chris watton said:
S6 00 MPH
Hmmm, it really doesn't read so well if you space it differently, does it?
chris watton said:
Are the throttle bodies quite easy to remove and replace?
Something that's probably totally made up (please consider my unsubstantiated opinion as just that):
In the grand scheme of things, no. But when you take into consideration sorting out getting the airflow on each inlet nice & even, you might want to get a garage to take care of it...
Always wondered if there was a market for a "travelling TVR (etc.) mechanic" for people with little time on their hands and small jobs that needed doing...
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