Need alittle more BHP

[p4paul]

Hi Chaps... a quick note to ask for some advice !
I what to increase the BHP on my chim 4.0 (98), would anyone have any idea how i go about this. I don't want a new TVR as I love the one i have, just alittle more Horse. Poeple have mensioned exhausts and upgrades. I'd like some object advice.

CHEERS

[shpub]

1. Exhausts do nothing for horsepower.
2. Additional horsepower costs around £100 per 1 bhp but gets exponential very quickly.
3. The best way of getting performance is brake & suspension upgrades and driver training.
4. Any quote you will get will be 50% of the actual cost.

The next question is how much money do you have?

[p4paul]

Thanks for the advise... have just under 2000( as we are not ski-ing this year).
May look at brakes but really wanted more punch.

REGARD

[Podie]

Could try a Mark Adams Tornado chip...

[Pies]

Podie said:

Could try a Mark Adams Tornado chip...

And new induction kit see ACT



Now what will the MAC do on its own?

[M@H]

p4paul.. hi and welcome...

you may find that no more BHP and a "better" Car will give you what you seek... What are you looking for?
a) more 0-60 grunt for the Trafficlight GPrix
or
b) a better overall "performance" car.

For a) initially go for a re-map and rolling road,
for b) initially go with suspension, brakes, driver training etc etc.

of course overall, both are going to work wonders, but as you are on a budget, choose the path you want to follow.

Hope that helps.
Cheers
Matt.


>> Edited by M@H on Thursday 4th December 16:10

[p4paul]

Just had a look at there website.... feel like I'm in a sweet shop.
I'll call them tomorrow and have a chat..!

THANKS FOR THE ADVICE

[shadowninja]

'course if you just want it to feel like youre driving a more powerful car the answer is to get some avon zz1s... with all this wet weather you'll wish you had less power

[RichB]

Hi Paul, I've had work done by Tim “ACT” Lamont and Mark “Tornado” Adams, cost around £1500 plus cam, say another £1k and brakes around £1500, so Steve's about right £2.5k for 25-30 bhp and say 30 lbs ft. Check out profiles of Apache, Gerjo, Marlon and mine for more info - although we all drive Griffiths Rich…
p.s. also a few pic’s of my engine etc. www.greenbear.org.uk

[Bomber]

Why not , before throwing money at expensive chips and cams, undertake a session on a rolling road to see if the engine is producing what it should be without the trendy add ons? £100 per BHP is not realistic for the average owner that just wants to squeeze a 10-15 BHP increase in drive in drive out figures, and get a crisper car. The figure given is for folk who are looking for serious power after obtaing the "easy" gains.
Sonetimes staying away from TVR "experts" can save money.......

[GreenV8S]

Bomber said:

£100 per BHP is not realistic for the average owner that just wants to squeeze a 10-15 BHP increase in drive in drive out figures, and get a crisper car.

I would say £100 per bhp is actually a very good guide, although you can easily end up paying way way more than this unless you're carefull.

[Bomber]

I'd like a 320 bhp 5 litre V8 TVR engine...yes sir that will be £32,000.

I have a 220 BHP 4.0 engine and would like another 100 BHP...yes sir that will be £10,000.

I don't think so!!

Now, I have a 320 BHP 5.0 Litre engine, and I would like to see another 20 BHP £2,000? Yes you're probably correct.

10 BHP at the rollers for a standard 4.0 litre car thats not been "tweaked" £1000? Car may well have been retarded to run on 95 octane fuel, air filter blocked, fuel pressure low etc, etc.

What I suggested was that there are some easy and cheap horses to be found before the £100/BHP is realistic..I don't doubt that the figure is a good guide when in pursuit of a fire breathing dragon.

I addition, that easy 10 or so BHP can be obtained without going to the specialist who would seek to provide you with his aftermarket parts as the path to releasing hidden horsepower and relieve you of your hard earned cash....

[shpub]

By all means get a rolling road chcek to make sure you have got all that you should but even that can be expensive....

Not uncommon to find the lacking power is due to an engine fault like injectors or cam. In which case you get back to the £100 per bhp scenario.

If you are on a tight budget, then using ally parts instead of CF will save a lot of money but to be honest even getting 10 bhp addition from a good running engine is not easy. If it was... TVR would have done it.

Been down most of the upgrade paths over the years. www.t-v-r-services.co.uk have most of the details. The latest incarnation of the 520 fire breather isn't up there yet.

[RichB]

Bomber said:

Now, I have a 320 BHP 5.0 Litre engine, and I would like to see another 20 BHP £2,000? Yes you're probably correct.

I assuming you don't have 320bhp but I get you drift.

Bomber said:

10 BHP at the rollers for a standard 4.0 litre car thats not been "tweaked" £1000? Car may well have been retarded to run on 95 octane fuel, air filter blocked, fuel pressure low etc, etc.

and after you have employed someone like Mark for a couple of hours, and paid for the rolling road and perhaps replaced a lambda sensor - how much change from £5-600?

Bomber said:

I addition, that easy 10 or so BHP can be obtained without going to the specialist who would seek to provide you with his aftermarket parts as the path to releasing hidden horsepower and relieve you of your hard earned cash...

If you knew these guys you would also know the opposite is true, many of them are prepared to offer advice and time f.o.c. and only sell parts if you really want them. I think that's a bit harsh actualy Bomber. Rich...

[Incorrigible]

If you're handy with the spanners buy a second hand 500 engine and bung it in

If you're REALLY handy with the spanners (welder electrics etc) buy a second hand AJP 4.5 V8 and bung it in (seen a Griff like this, it was awesome)

Else get your wrok to send your payslip directly to a reputable engine tuner and collect the £2.50 change (if you're lucky) every month

If I were you, I'd get it set up on a RR with someone like Mark Adams and spend the other £1500 on track days

[raceboy]

Sell the 98 4.0 Chimaera, lets say £17k, put your £2k to it and spend £19k on a 97 4.2 Cerbera
Then you might actually notice the performance increase

[2 sheds]

The most cost effective upgrade (if you are only looking for around 7-10 bhp & torque) is fitting decent trumpets, £250-300 some will need fuel re-map some won't, and the way i see it visiting Mark Adams etc comes under maintenance, so the extra power becomes good value.
TVR uprate the cams and on the 4.5 & 500 polished or modified the heads but didn't do much to improve the induction, i guess its down to budget they couldn't afford to "sort" everything, but this does leave room for simple modest inceases for relatively little money.
Tim

[Pies]

Tim which size trumpets for a 4L

cheers

[2 sheds]

Pies said:

Tim which size trumpets for a 4L cheers

38mm base with 50mm openings (superflares) as the 4.0L uses standard manifold with 38mm porting.
Tim

[Pies]

Ta, passed on to santa