The new acquistion 430 Chimaera
Discussion
Well it is finally happening. A few little hurdles to overcome like how do I get the V5 in my name when am not in the UK? There are a few little niggles to be addressed but the garage that did the pre Purchase inspection will be dealing with those.
Now the issue that concerns me the most is that he says it suffers some low speed shunting which of course is not uncommon and the obvious answer is to upgrade to an MBE or Canams set up ............................................ but that is not in the budget to be able to do so. So emailed Kits and Classics about their remapping service. Joolz says that he cannot guarantee that it will eliminate the shunting but of course the mapping session should help her run as well as she can.
So started reading up on the issue and Mathew's Griffith came up as it still runs the standard system but of course he also has the ACT twin plenum fitted but how much did this help? or was the shunting issue solved before this?
Any advice on the ways to help eliminate this would be appreciated.
Now the issue that concerns me the most is that he says it suffers some low speed shunting which of course is not uncommon and the obvious answer is to upgrade to an MBE or Canams set up ............................................ but that is not in the budget to be able to do so. So emailed Kits and Classics about their remapping service. Joolz says that he cannot guarantee that it will eliminate the shunting but of course the mapping session should help her run as well as she can.
So started reading up on the issue and Mathew's Griffith came up as it still runs the standard system but of course he also has the ACT twin plenum fitted but how much did this help? or was the shunting issue solved before this?
Any advice on the ways to help eliminate this would be appreciated.
QBee said:
I have a smooth bore kit that I had on my car until a few months ago, and a 20AM AFM that is a matter of weeks old.
If you want Jools to try them I can drop them off to him, sale or return. He is only 40 miles from me, and I have a cold start puzzle that could do with his attention and Emerald mapping skills.
The 20 AM was about £120 from memory, the smooth bore kit £180. I would be looking for 50% of anything used.
He would need to modify the wiring for the AFM, it uses a different plug. I do have the plug still.
Final question - geographically where is the car at present?
Near Preston in Lancashire. And yes the induction and AFM are of interest.If you want Jools to try them I can drop them off to him, sale or return. He is only 40 miles from me, and I have a cold start puzzle that could do with his attention and Emerald mapping skills.
The 20 AM was about £120 from memory, the smooth bore kit £180. I would be looking for 50% of anything used.
He would need to modify the wiring for the AFM, it uses a different plug. I do have the plug still.
Final question - geographically where is the car at present?
carsy said:
The 4.3's run a Kent 214 cam as standard. This cam will shunt low down on these motors end of. It was originally designed for use with a carb not efi and a plenum. However once spinning its lovely. Do you know if your still on the original cam ?
Richening the low rpm range via Jools will definately help though.
Putting in a milder cam will also sort it.
Or go the dual plane manifold and self learning fitech injection thats recently been spoke about on here.
I think it is still on the original cam. It has not been mentioned that it has been changed.Richening the low rpm range via Jools will definately help though.
Putting in a milder cam will also sort it.
Or go the dual plane manifold and self learning fitech injection thats recently been spoke about on here.
QBee said:
Jools is a proper TVR engineer, by the way. He gets a lot of press on here for his ECU skills, but he covers all jobs. Hence my comment about getting him to fit stuff for you.
Preston means X-Works to me - in which case you have made a good choice of inspection engineers.
Spot on Heath is on the job.Preston means X-Works to me - in which case you have made a good choice of inspection engineers.
jazzdude said:
I'm not too sure about the 4.3 but my 400HC is also supposedly prone to shunting compared to a standard 400.
It had had all the ACT smooth bore stuff on it when I bought it including the Decat Ypiece, carbon trumpets and still shunted. I changed all the ignition components and cleaned the Injectors, ditched the plug extenders and changed the sparks to 6s, this improved things but the shunting was still there.
Then I burned a TVR green tune map onto a EPROM chip and changed the tune resistor to 470ohm and the car is now so smooth, practically no shunting and is even quieter and more refined than ever.
I stress that this was not on a rolling road, does not have a custom map on it and cost me about £50.00 but the car is so good that I am now in two minds whether to replace the ECU this winter.
You can throw all sorts at these cars but I have since learnt that with cats and emissions mapping on the standard 14cux, dialing out shunting is very difficult as the ECU is trying to not destroy the cats with fuelling that also compromises the low speed drive ability of these cars.
Going to someone who knows the 14cux and how to improve it is a must before you go mad on the ACT website.
Far from going mad on the ACT website I am following the advice of the resepcted experts. Heath at X Works will be dumping the plug extenders and fitting new leads with socks and replacing the dizzy cap and rotor arm should that be needed. There are a couple of other little jobs he will be doing for me such as giving the engine and tune a once over. QBee is graciously going to send up his smooth bore induction that is no longer wanted and that will be fitted thus resulting in a saving and removing to old original ribbed inlet hoses which she still has at the moment.It had had all the ACT smooth bore stuff on it when I bought it including the Decat Ypiece, carbon trumpets and still shunted. I changed all the ignition components and cleaned the Injectors, ditched the plug extenders and changed the sparks to 6s, this improved things but the shunting was still there.
Then I burned a TVR green tune map onto a EPROM chip and changed the tune resistor to 470ohm and the car is now so smooth, practically no shunting and is even quieter and more refined than ever.
I stress that this was not on a rolling road, does not have a custom map on it and cost me about £50.00 but the car is so good that I am now in two minds whether to replace the ECU this winter.
You can throw all sorts at these cars but I have since learnt that with cats and emissions mapping on the standard 14cux, dialing out shunting is very difficult as the ECU is trying to not destroy the cats with fuelling that also compromises the low speed drive ability of these cars.
Going to someone who knows the 14cux and how to improve it is a must before you go mad on the ACT website.
We are not sure how sringent the testing is here on emissions and CATs so we will avoid removing or damaging them if at all possible. At least until we learn more! Maybe it will be possible to remove the CATs entirely?
Now I do like a responsive throttle and that is why I bought a TV5 throttle body for the MGF as it makes it much more responsive and that is why have been asking about teh 71mm or 72mm plenums and have even been reading about the twin plenum set up however the responses have been a rather mixed bag of answers so am even more confused that i was at the start!!!
QBee said:
I can post the bits to either of them. I know them both so can trust them. One thing about the ACT smooth bore induction kit - it comes too long, and one then cuts it to fit. Therefore mine was cut to fit my car, so may not fit yours. Happy to send it anyway, as that's the only way to find out. Personally, I would be very surprised if it sorted the shunting, unless your car has a badly kinked elephant trunk.
QBee if you could post them up to heath it would be most appreciated I am sure he will be able to get them fitted. Beign aware of the age of the original ribbed hoses replacing them with new smooth bores ones will be an improvement over all regardless of the shunting issue. I'll ask him to place the old originals in the boot and store them away once it gets here. Once he let's us know what he has fitted and used we can settle up.jazzdude said:
For emissions, it's the main cat you need, the pre cats can go. What most do when they decat is either take off the y piece with the main cat in it, and fit an act or one from Clive, keeping the original, or get a second y piece from a scrap yard. When it is time for the Mot, just swap the y piece back to the original and put your white resistor back on so that the emissions come down to the right levels.
Hmmm this is an early Chimaera with the multi bolt flanges so not sure how easy or hard to keep changing them. Plus finding a Clive Y piece is not so easy. have no idea about the white resistor, what it does, or where to find it???Am not new to running older cars the newest car is an 02 Rover 75 CDT and it's table mate a 99 MGF 75th Anniversary that replaced a 97 MGF so fairly familar with componants aging, wearing, and failing with age. The F is old enough to be on Mems 1.9 and distributer.
I do not think that I am computer literate enough to start creating my own chips for the TVR so will have to leave that to those that are familar with it and good at it! Have been doing some reading and it seems that the 430 (4.2) uses a Blue chip according to ACT.
I do not think that I am computer literate enough to start creating my own chips for the TVR so will have to leave that to those that are familar with it and good at it! Have been doing some reading and it seems that the 430 (4.2) uses a Blue chip according to ACT.
wuckfitracing said:
Well done on choosing the rarest Chim. ??
Thank you ................................. still do not know what grabbed about the 430 but something sure did! as no matter how nice the 400's I looked at online and the one that I was kindly taken out in just kept being drawn back to looking at 430's.BeastMaster said:
IMHO believe that remaps, new chips aftermarket ECU will have very little gain on these cars, they are very tolerant to fuel and have a very wide operational band in which they will run well.
In the modified cars and owners I have seen and spoken to the changes were made because of a fault and the frustration of trying to uncover a issue, most of them being intermittent - that is a lot of money to spend on fault finding with very little gains in other areas. Remaps have their place of course in order to take advantage of mechanical upgrades, but with the wider understanding of the existing system it has become a lot simpler.
I am just saying that your new car has some running issues, and you need to find the issue first - a remap, aftermarket chip will not address the problem.
As has been said before and agree, the best mod to improve all round running is to run the decat map, this works for me
Andy
Perhaps I should consider a decat Y piece then. Get it fitted before she comes over then a green tune would not effect the CAT at all?In the modified cars and owners I have seen and spoken to the changes were made because of a fault and the frustration of trying to uncover a issue, most of them being intermittent - that is a lot of money to spend on fault finding with very little gains in other areas. Remaps have their place of course in order to take advantage of mechanical upgrades, but with the wider understanding of the existing system it has become a lot simpler.
I am just saying that your new car has some running issues, and you need to find the issue first - a remap, aftermarket chip will not address the problem.
As has been said before and agree, the best mod to improve all round running is to run the decat map, this works for me
Andy
QBee said:
Yours is an early car. Be careful whether your car has the early bolted joints from manifolds to Y, or the later clamps. I have not seen a decaf Y piece with bolts, though they may well exist.
Thanks and yes she has the bolted flanges. ACT list the bolted versions ......................... I already checked on that. Clive is not making any Y pieces until October at least due to work load................................ yes I did ask him via emial.So what to do? ...................................... what to do!
Edited by Brithunter on Wednesday 30th August 13:27
Classic Chim said:
Congratulations must be in order. Well done on getting the car of your choice.
I'd be inclined to leave cat in place and get it mapped by Joolz then enjoy the car until you've owned it awhile before spending money on anything at all. These cars sometimes have a habit of failing on parts you'd least expect, own the car and feel it out before committing I'd say.
Why remove the cat, your in a warm country so it will heat up fast and not cost much in petrol at all really. Imho. You won't like the noise if you aim on cruising or carrying passengers let alone the stench of fuel at all times, fumes when your stationary etc, think long and hard.
Joolz cannot fit her in until october and unless something goes really awry she will be in Bulgaria by then ................................. or at least that is the plan. This is why the intention is to get her sorted before leaving the UK as we cannot just "pop" back as it's not just "up the road".I'd be inclined to leave cat in place and get it mapped by Joolz then enjoy the car until you've owned it awhile before spending money on anything at all. These cars sometimes have a habit of failing on parts you'd least expect, own the car and feel it out before committing I'd say.
Why remove the cat, your in a warm country so it will heat up fast and not cost much in petrol at all really. Imho. You won't like the noise if you aim on cruising or carrying passengers let alone the stench of fuel at all times, fumes when your stationary etc, think long and hard.
This is why am trying to fathom the best set up now for her. We are ditching the plug extenders for new leads with socks. She is getting new shocks and geo set up .......................... no point in paying for a pre purchase inspection then ignoring what the report says and recommends! Heath she could do with new shocks as the originals were tired.
Belle427 said:
Id leave the cat alone, clives y is a work of art but im guessing it does very little to the car power wise, it sounds a little different but not a noise some people like.
Id probably look at improving the breathing via some act carbon trumpets and enjoy driving it, go fast enough so you dont feel any shunting!
Hmmm well we are not sure when I will get to be behind the wheel for the first time. She will spend a little time in Heath's workshop and when that will be done depends on his work load that he already has booked in. We are hopefully moving to our new home the weekend of the 16th September and a family member is probably coming out shortly after so am wondering if i might be able to slip away to the UK to pick up then drive her back. 3000km would be a heck of a get to know drive and shake down run!Id probably look at improving the breathing via some act carbon trumpets and enjoy driving it, go fast enough so you dont feel any shunting!
Probably wishful thinking as doubt it will work out like that but one can dream.
carsy said:
If you cant get it remapped by Jools in time you could speak to Stevesprint on here. He has a 4.3 Griff and has succesfully remapped his himself. Infact theres not a lot Steve cant do with the 14cux.
Im sure if you asked nice enough he would send you a new improved chip for your ecu. Which would be based on what hes done to his.
Interesting and thanks for the information. Will give it some thought.Im sure if you asked nice enough he would send you a new improved chip for your ecu. Which would be based on what hes done to his.
Well after a small delay the new shocks and various other small jobs are done. She now has brand new shiney ceramic leads and no plug extenders and a set of nice new plugs fitted. Couple of coolant weeps sorted out and another good check over completed. Next is the suspension geo set up and the new LHD lenses to be fitted and adjusted. With the new leads and plugs he says she is running sharper than she did. perhpas the extenders were breaking down? So we are moving forwards even if slowly.
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