400bhp from a NA 500

400bhp from a NA 500

Author
Discussion

ChilliWhizz

Original Poster:

11,992 posts

161 months

Thursday 24th May 2018
quotequote all
Anyone?

Still needs to be useable on the road, not something that won't tick over below 2k rpm.... Not interested in bigger capacity or FI......... ITB's next step for me, but consensus used to be max 20bhp increase (although cracking throttle response)....That's £3k plus for 20bhp and still 20bhp short of that elusive 400...... Anyone... biggrin

And, if you mention turbo, I will find you. And let your tyres down. all of them. And glue your door buttons up.

TIA, Chilli.


spitfire4v8

3,991 posts

181 months

Thursday 24th May 2018
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It's possible .. throttle bodies will allow you to run much more cam than a plenum and still retain some kind of lower rev manners, but I don't think any RV8 at those levels will be really civilised.
The 5 litre tvr engine in my tuscan made 380hp on dellortos so not far to go to get to 400 on that one and i've mapped a 5 litre tuscan on jenveys at around the same level

The record for hp on my dyno for a RV8 is roseytvr's which made 393hp (5.2 by John Eales) .. so 200cc less to make it a true 5 litre and bit more cam would have done the 400.

On another day on another dyno it might be a bigger number

so yes entirely possible to get more than 400hp I would think but it depends on your own views on driving manners I suppose.

phazed

21,844 posts

204 months

Thursday 24th May 2018
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earssmile

citizen smith

743 posts

181 months

Thursday 24th May 2018
quotequote all
ChilliWhizz said:
Anyone?

Still needs to be useable on the road, not something that won't tick over below 2k rpm.... Not interested in bigger capacity or FI......... ITB's next step for me, but consensus used to be max 20bhp increase (although cracking throttle response)....That's £3k plus for 20bhp and still 20bhp short of that elusive 400...... Anyone... biggrin

And, if you mention turbo, I will find you. And let your tyres down. all of them. And glue your door buttons up.

TIA, Chilli.
My suggestion would be to contact John Eales Engineering LTD, he is the V8 man. If memory serves me well, he use to build V8's for the Paris Dakar Rally Vehicles.

SILICONEKID 345HP 12.03

14,997 posts

231 months

Thursday 24th May 2018
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Will you sell me your triple please ?

phazed

21,844 posts

204 months

Thursday 24th May 2018
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SILICONEKID 345HP 12.03 said:
Will you sell me your triple please ?
You make me laugh Daz smile

DangerousDerek

8,655 posts

220 months

Friday 25th May 2018
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50 shot of nitrous. Sorted

QBee

20,957 posts

144 months

Friday 25th May 2018
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Where was yours dyno'd at 400.1 bhp Peter?

QBee

20,957 posts

144 months

Friday 25th May 2018
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My brain (or what passes for one) is saying "Wildcat heads and a lairy cam".....anyone else have a similar thought?
I have long thought that the RV8 restriction was getting enough jungle juice and air past the inlet valves. idea

phazed

21,844 posts

204 months

Friday 25th May 2018
quotequote all
QBee said:
Where was yours dyno'd at 400.1 bhp Peter?
SRR before Joolz tweaked the map to compensate for the ACT manifolds.

N7GTX

7,857 posts

143 months

Friday 25th May 2018
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ChilliWhizz said:
And, if you mention turbo, I will find you. And let your tyres down. all of them. And glue your door buttons up.

TIA, Chilli.
I'll just leave this here then ...................



getmecoat

laugh

SILICONEKID 345HP 12.03

14,997 posts

231 months

Friday 25th May 2018
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Super charge it and settle with 500hp.

ChilliWhizz

Original Poster:

11,992 posts

161 months

Friday 25th May 2018
quotequote all
I’d like to thank almost everyone for your contributions here. It’s pretty much confirmed what I’ve known for a number of years now, and whilst beastie is by no means lacking in the performance department, the round 400 would have been a nice target to hit without more mega expenditure 😊 thank you to jools, someone we all know knows what he’s talking about. Thanks Daz for asking about my triple, that’s about 5 years now you’ve been trying to buy it off me. Big thanks to Peter for not mentioning here how big his is whistle another thanks to DD for the chemical suggestion, but I’ve never been big on injecting stuff. Most stuff.

I’m really not sure where to go from here, 400 would be a nice figure, but my current 360 doesn’t hang about... that said, I’m mightily impressed with some of the talk figures that are torqued about 😁 I do quite like my progressive power and torque though, it’s kinda all year round friendly and won’t stuff you backwards through the nearest hedge at first opportunity 😊 Sadly, whilst I’d like a TVR that blows everything else into the weeds, it’s really not a doable thing.... on so many levels ☹️

That said, it’s an old skool British two seater front engine RWD manual with a 5 litre V8 up front... and sounds fecking awesome biggrin

phazed

21,844 posts

204 months

Friday 25th May 2018
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Your welcome wink

QBee

20,957 posts

144 months

Friday 25th May 2018
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Your car is superb already Chilli. More than fast enough for the pubic road. All 400 bhp will do is get you to the end of a long straight a tad, and a very small tad at that, faster than at present. It won't make it go around corners any faster.

I saw an ad for a Vantage V8 convertible the other day........maybe, when I retire.....whistle