Chimaera 450 SC Problem

Chimaera 450 SC Problem

Author
Discussion

maxxander

Original Poster:

44 posts

177 months

Wednesday 30th April 2014
quotequote all
Hi All, I'm almost at the end of a very long and extensive build. Last week we took it to a rolling road for final set up and a power run and were rewarded with very disappointing results. I wondered if anyone had any thoughts as to what could be the problem/s that we are experiencing? Firstly I'll give a very basic overview of the work carried out. We fitted an SC Power 500 Supercharger kit with C38-91 Blower Upgrade, I also spec'd a 20% larger Intercooler. The engine had a full tear down and was rebuilt using all new and upgraded parts including V8 Developement BV Heads, 45mm inlet manifold with a ported trumpet base and flared trumpets, Bosch injectors and an 044 fuel pump. It's running an Omex 710 ECU and coilpacks and has Zircotec coated decat manifolds.
The problem, and it is kind of a major one, is that we are only getting 0.6PSI at the plenum. We can't find any restrictions in the pipework and even went as far as re routing the K&N but nothing has made a difference. Aside from the lack of boost the engine is running beautifully.
If anyone out there can offer any advice as to why this might be it would be very much appreciated. Having missed all of last Summer, I am determined to get back on the road before this Summer is over and am now at the point where I wish I hadn't started this project as the car was previously nigh on perfect. Ho hum, best laid plans and all that!






Edited by maxxander on Wednesday 30th April 14:51

chris watton

22,477 posts

259 months

Wednesday 30th April 2014
quotequote all
I cannot help or give advice - but just wanted to add that those pictures are pure TVR porn! Astounding work and attention to detail!

Hope it gets sorted PDQ!

gacksen

680 posts

142 months

Wednesday 30th April 2014
quotequote all
cant help either but wonderfull looking engine !

s p a c e m a n

10,752 posts

147 months

Wednesday 30th April 2014
quotequote all
yum

Same pressure before the intercooler, did you try bypassing it, no leaks?

Strange one frown

450Nick

4,027 posts

211 months

Wednesday 30th April 2014
quotequote all
Check the supercharger is getting a proper supply of traction oil - if it does not have enough oil, it will not produce boost. If it is getting oil then check your re-circ valve spring. If it is giving out too early then it will dump boost back to the charger plenum. Lovely looking build though by the way - you've got almost exactly the same spec engine as mine (even the same colour car!)

LordGrover

33,532 posts

211 months

Wednesday 30th April 2014
quotequote all
450Nick said:
...you've got almost exactly the same spec engine as mine (even the same colour car!)
Have you checked your garage? scratchchin

chris watton

22,477 posts

259 months

Wednesday 30th April 2014
quotequote all
LordGrover said:
450Nick said:
...you've got almost exactly the same spec engine as mine (even the same colour car!)
Have you checked your garage? scratchchin
hehe

That just made me laugh out loud!

BarnFind

492 posts

145 months

Wednesday 30th April 2014
quotequote all
450Nick said:
Check the supercharger is getting a proper supply of traction oil - if it does not have enough oil, it will not produce boost. If it is getting oil then check your re-circ valve spring. If it is giving out too early then it will dump boost back to the charger plenum. Lovely looking build though by the way - you've got almost exactly the same spec engine as mine (even the same colour car!)
What is the colour ?


450Nick

4,027 posts

211 months

Wednesday 30th April 2014
quotequote all
LordGrover said:
Have you checked your garage? scratchchin
Funny you should say that - I haven't seen mine in a year as it's off for a 'rebuild'. Supposed to be coming back in a couple of weeks but if it doesn't then I know where it's gone!

450Nick

4,027 posts

211 months

Wednesday 30th April 2014
quotequote all
BarnFind said:
What is the colour ?
Actually its not quite the same as mine, that appears to be Rolex Blue, mine has been resprayed as House of Kolor Midnite Blue over a black undercoat.





(any excuse)

fatboychim

976 posts

250 months

Wednesday 30th April 2014
quotequote all
That does look truly beautiful.
Did you fit the one way valve in the trumpet base outlet. Is it the right way round?

macdeb

8,492 posts

254 months

Wednesday 30th April 2014
quotequote all
Have the suppliers of the supercharger any idea?
Looks fantastic by the way, I like this stuff [but beware that the manifolds wont look that good for long, and who did them will not give a st, I know!]

portzi

2,296 posts

174 months

Wednesday 30th April 2014
quotequote all
BarnFind said:
450Nick said:
Check the supercharger is getting a proper supply of traction oil - if it does not have enough oil, it will not produce boost. If it is getting oil then check your re-circ valve spring. If it is giving out too early then it will dump boost back to the charger plenum. Lovely looking build though by the way - you've got almost exactly the same spec engine as mine (even the same colour car!)
What is the colour ?
all l can say is keep the pictures coming. lf you have had a full body off rebuild then this could be truely the best chimaera out there, maybe surpassing engineer johns rebuild , but only by body colour. rolex blue or reflex purple, or a house of kolor special maybe ??. wonderful TVR porn smile

mark

maxxander

Original Poster:

44 posts

177 months

Wednesday 30th April 2014
quotequote all
chris watton said:
I cannot help or give advice - but just wanted to add that those pictures are pure TVR porn! Astounding work and attention to detail!

Hope it gets sorted PDQ!
Thanks for the positive comments, I'm hoping it will drive as well as it looks once we've sorted the problem.

maxxander

Original Poster:

44 posts

177 months

Wednesday 30th April 2014
quotequote all
s p a c e m a n said:
yum

Same pressure before the intercooler, did you try bypassing it, no leaks?

Strange one frown
Yes, tried that and no leaks that we could find. That was our first thought too but sadly no.

maxxander

Original Poster:

44 posts

177 months

Wednesday 30th April 2014
quotequote all
450Nick said:
Check the supercharger is getting a proper supply of traction oil - if it does not have enough oil, it will not produce boost. If it is getting oil then check your re-circ valve spring. If it is giving out too early then it will dump boost back to the charger plenum. Lovely looking build though by the way - you've got almost exactly the same spec engine as mine (even the same colour car!)
Hi Nick, just checked your profile and they are virtually identical but don't worry I haven't pinched yours, mines in Rolex Blue (purple). By the way, love your car. In answer to your questions, traction oil was pressurised to 15PSI and levels checked pre start and after running up - all seems good on that front. Your concerns about the re-circ valve are definitely worth checking out.

maxxander

Original Poster:

44 posts

177 months

Wednesday 30th April 2014
quotequote all
BarnFind said:
What is the colour ?
It's Rolex Blue or probably a better name would have been Cadbury's Purple.

maxxander

Original Poster:

44 posts

177 months

Wednesday 30th April 2014
quotequote all
fatboychim said:
That does look truly beautiful.
Did you fit the one way valve in the trumpet base outlet. Is it the right way round?
That's a very valid point, hopefully yes, but to be on the safe side I'll have it checked out.

maxxander

Original Poster:

44 posts

177 months

Wednesday 30th April 2014
quotequote all
macdeb said:
Have the suppliers of the supercharger any idea?
Looks fantastic by the way, I like this stuff [but beware that the manifolds wont look that good for long, and who did them will not give a st, I know!]
So far the only comment is that they have supplied 80 plus so far and haven't had a problem and that it must be an installation error. Time will tell!

portzi

2,296 posts

174 months

Wednesday 30th April 2014
quotequote all
maxxander said:
BarnFind said:
What is the colour ?
It's Rolex Blue or probably a better name would have been Cadbury's Purple.
yes rolex blue best colour. l have seen a tam in cadbury purple and that colour is very similar but different. rolex blue is really a bmw colour according to Malcolm at surface and design in blackpool . blue in some lights , purple in others smile