TVR Chimaera Engine - Help!
Discussion
power mad chancers??? how very dare you....It's all in the heads,,
Sell your 4.0 heads and get some ported big valve ones and whatever lump goes underneath them it will be open to bigger power gains from there on in.
if you stay with 4.0 it's not worth the cost of the heads as the gains won't be huge.
It's important to remember if you tune them up you could do with better ignition advance and bespoke fuelling to get the best out of them giving it the best protection you can (Ecu change)
Not cheap.
Sell your 4.0 heads and get some ported big valve ones and whatever lump goes underneath them it will be open to bigger power gains from there on in.
if you stay with 4.0 it's not worth the cost of the heads as the gains won't be huge.
It's important to remember if you tune them up you could do with better ignition advance and bespoke fuelling to get the best out of them giving it the best protection you can (Ecu change)
Not cheap.
Don't discount the 4lt for upgrades if you start with a strong engine the results can be quite surprising, l have to admit I wouldn't have go down this road if I hadn't already sorted the handling, brakes and had the outriggers replaced on the car, you do tend to get attached to them and when the engine goes bang I only have to buy the bottom half or that's what I told myself.
ChilliWhizz said:
4.0 - good for Sunday drivers and girls... (Mat Smith excluded)
4.5/4.6 - good for those with an identity crises or bisexual tendencies (sorry Alun, not personal)
5.0 and above - real men only need apply....
It really is very simple.. feel free to pm me if you need clarification on any of the above
Chilli
Now, you old dinosaur 4.5/4.6 - good for those with an identity crises or bisexual tendencies (sorry Alun, not personal)
5.0 and above - real men only need apply....
It really is very simple.. feel free to pm me if you need clarification on any of the above
Chilli
I know you like living in the dark ages with your beefed up, mahooosively powerful whole 5+ litres 
Us modern owners, you know the younger generation, who understand these things have moved on from bigger heads and bores. It is hard to understand I know but fitting a turbo is not just about power. It is about saving the planet. Turbos reduce those nasty gases that those old wheezing lumps put out. Polar bears are important. Yes they are....
Anyway I digress. Please tell all the nice people how much power and torque your huge monster puts out old chap. Don't be shy, let us see that graph just one more time.
The OP wont know but my poxy little 4 litre puts out 355 bhp at the wheels so around 415 at the engine. Then there's the torque. Just a measly little 481 ft/lbs. Lets hope the OP is not a dinosaur....
N7GTX said:
ChilliWhizz said:
4.0 - good for Sunday drivers and girls... (Mat Smith excluded)
4.5/4.6 - good for those with an identity crises or bisexual tendencies (sorry Alun, not personal)
5.0 and above - real men only need apply....
It really is very simple.. feel free to pm me if you need clarification on any of the above
Chilli
Now, you old dinosaur 4.5/4.6 - good for those with an identity crises or bisexual tendencies (sorry Alun, not personal)
5.0 and above - real men only need apply....
It really is very simple.. feel free to pm me if you need clarification on any of the above
Chilli
I know you like living in the dark ages with your beefed up, mahooosively powerful whole 5+ litres Us modern owners, you know the younger generation, who understand these things have moved on from bigger heads and bores. It is hard to understand I know but fitting a turbo is not just about power. It is about saving the planet. Turbos reduce those nasty gases that those old wheezing lumps put out. Polar bears are important. Yes they are....Anyway I digress. Please tell all the nice people how much power and torque your huge monster puts out old chap. Don't be shy, let us see that graph just one more time.
The OP wont know but my poxy little 4 litre puts out 355 bhp at the wheels so around 415 at the engine. Then there's the torque. Just a measly little 481 ft/lbs. Lets hope the OP is not a dinosaur....
ChilliWhizz said:
PhilH42 said:
Sorry OP but at least its nice and clear that you should bin that 4L and jump to at least a 5 possibly 5.4 and strap a couple of turbo's on for good measure.
In all seriousness though....and I'm finding that difficult for some reason tonight...a 400 is a great machine when in top running order but if you have an engine in bits I'd take this opportunity to safe guard the very likely situation of wanting more power...if as has already been said its a keeper.
Totally agree with Phil, the 4.0 is a great sports car, absolutely no question... I spent a small fortune having mine rebuilt, went for NA.. I love it, it revs like buggery, and it's properly quick.. but the FI cars are a different thing again... as you have the opportunity to start from scratch, you can build for NA or FI.. I have high compression forged pistons, to get the benefit of gluing a turbo on I'd need to rebuild the engine with LC pistons... a few thousand quid before even buying the turbo kit... think twice (or three times) and spend once In all seriousness though....and I'm finding that difficult for some reason tonight...a 400 is a great machine when in top running order but if you have an engine in bits I'd take this opportunity to safe guard the very likely situation of wanting more power...if as has already been said its a keeper.
Iain, there's no questioning the power your car has... like Mac's, or Hoofa's... or Nick's (orange Chim) all due respect....
Yep beastie only has a measly 360 at the fly.... but, that's all a driving God needs....
trev4 said:
Don't discount the 4lt for upgrades if you start with a strong engine the results can be quite surprising, l have to admit I wouldn't have go down this road if I hadn't already sorted the handling, brakes and had the outriggers replaced on the car, you do tend to get attached to them and when the engine goes bang I only have to buy the bottom half or that's what I told myself.
My 4.6 has been built more for torque but only 298/9 hp so this is very impressive.
ChilliWhizz said:
PhilH42 said:
Sorry OP but at least its nice and clear that you should bin that 4L and jump to at least a 5 possibly 5.4 and strap a couple of turbo's on for good measure.
In all seriousness though....and I'm finding that difficult for some reason tonight...a 400 is a great machine when in top running order but if you have an engine in bits I'd take this opportunity to safe guard the very likely situation of wanting more power...if as has already been said its a keeper.
Totally agree with Phil, the 4.0 is a great sports car, absolutely no question... I spent a small fortune having mine rebuilt, went for NA.. I love it, it revs like buggery, and it's properly quick.. but the FI cars are a different thing again... as you have the opportunity to start from scratch, you can build for NA or FI.. I have high compression forged pistons, to get the benefit of gluing a turbo on I'd need to rebuild the engine with LC pistons... a few thousand quid before even buying the turbo kit... think twice (or three times) and spend once In all seriousness though....and I'm finding that difficult for some reason tonight...a 400 is a great machine when in top running order but if you have an engine in bits I'd take this opportunity to safe guard the very likely situation of wanting more power...if as has already been said its a keeper.
ClassicChimaera said:
trev4 said:
Don't discount the 4lt for upgrades if you start with a strong engine the results can be quite surprising, l have to admit I wouldn't have go down this road if I hadn't already sorted the handling, brakes and had the outriggers replaced on the car, you do tend to get attached to them and when the engine goes bang I only have to buy the bottom half or that's what I told myself.
My 4.6 has been built more for torque but only 298/9 hp so this is very impressive.
China100 said:
Hi guys
All great comments- many thanks.
Two things - I'd be keen to hear your 4l upgrades.
Also, I have two Bilstein shocks, but I'm not sure if they are for the front or rear. How could I tell?
Ultimately I need to buy two others once I know if they are front or rear.
I new this thread would take off, good luck with your decisions, my upgrades are as follows.All great comments- many thanks.
Two things - I'd be keen to hear your 4l upgrades.
Also, I have two Bilstein shocks, but I'm not sure if they are for the front or rear. How could I tell?
Ultimately I need to buy two others once I know if they are front or rear.
Worrior stage 3 heads ( new spec)
45mm ported and polished inlet manifold.
45mm shortened trumpet base.
72mm plenum.
MC1 cam.
Precats removed.
ACT induction kit.
trev4 said:
Hi Alum yup still on the 14 cux but I have replaced just about everything electrical including the distributor, I think perhaps the difference is the new spec Worrior stage 3 heads from V8D,it will be interesting to see how I get on against you guys with a lot more torque on the track
There'd be nothing in it Those heads really do the job
trev4 said:
China100 said:
Hi guys
All great comments- many thanks.
Two things - I'd be keen to hear your 4l upgrades.
Also, I have two Bilstein shocks, but I'm not sure if they are for the front or rear. How could I tell?
Ultimately I need to buy two others once I know if they are front or rear.
I new this thread would take off, good luck with your decisions, my upgrades are as follows.All great comments- many thanks.
Two things - I'd be keen to hear your 4l upgrades.
Also, I have two Bilstein shocks, but I'm not sure if they are for the front or rear. How could I tell?
Ultimately I need to buy two others once I know if they are front or rear.
Worrior stage 3 heads ( new spec)
45mm ported and polished inlet manifold.
45mm shortened trumpet base.
72mm plenum.
MC1 cam.
Precats removed.
ACT induction kit.
trev4 said:
I new this thread would take off, good luck with your decisions, my upgrades are as follows.
Worrior stage 3 heads ( new spec)
45mm ported and polished inlet manifold.
45mm shortened trumpet base.
72mm plenum.
MC1 cam.
Precats removed.
ACT induction kit.
I saw your graph when you posted it on the Dyno printout thread and it seriously piqued my interest! Worrior stage 3 heads ( new spec)
45mm ported and polished inlet manifold.
45mm shortened trumpet base.
72mm plenum.
MC1 cam.
Precats removed.
ACT induction kit.
For me (with zero track aspirations), the thought of around 260-280 bhp whilst keeping the revvy nature of the 4ltr is extremely appealing- with the relevant braking/chassis upgrades first of course. Whilst the monster torque of some of the modified 5ltr cars is mind-boggling, I've been a long standing disciple of the Honda Church of Type R, so I actually rather enjoy changing gear rather than simply planting the pedal into the carpet...
I know it's likely a very un-cost efficient way of getting more power (but then isn't all N/A modifying), but I figured my car is going to need a new camshaft in the next couple of years anyway so something similar to the above might well be given serious consideration when the time comes...
Gassing Station | Chimaera | Top of Page | What's New | My Stuff