627 bhp (611.9 corrected) at Emerald

[Brummmie]

Took old faithful with a fresh engine rebuild and got some decent results. 627bhp@7000rpm peak, we set the limit at 7500 and it’s still doing over 600bhp, no point in revving it further, it’s doing 175mph in 4th at that.

For the hoot there is a 4.5 Cerbera for comparison

[Brummmie]

Hi Richard, lots changed! New pistons/bores, shorter trumpets, 242/251 .629 110lsa Texas speed cam, researched it all to try and get a later higher peak, and the theory worked! 175mph in 4th there.

[Brummmie]

N7GTX said:

Well, just to let you know that Dangerous Derek is claiming the fastest TVR on the SD1 Modified section of Facebook......

I’ll join and p!ss on his chips!

[Brummmie]

Which red TVR is that?
My email was shut down by virgin media so I need your addy again, I can send you a complete graph.

[Brummmie]

Pm won’t work, I can’t work out how to change email on my profile, you can do it through here though..

http://www.clbraking.co.uk/

[Brummmie]

spitfire4v8 said:

FarmyardPants said:

spitfire4v8 said:

From those graphs :

612hp/6.9litres = 89hp/litre

370hp/4.5litre = 82hp/litre

That’s a bit unfair on the AJP, the 6.9 has been mapped. My mapped 4.5 made 420.3hp (the only other mod being the SP exhaust)

Edit: thanks to your mapping skills

Hi I was assuming the cerbera had also been mapped seeing as its emerald rollers and they don't really go in for shootout days or random power runs, so assume it was a car that was in for mapping. If it was std it's a strong cerbera.
My post was a bit tongue in cheek anyway .. the engine builders will be laughing at the sweeping generalisations and untruths in my post!

Edited by spitfire4v8 on Monday 12th November 07:55

Yes, it was a mapped one, with an ECU swap if it was there more than likely.
Schmig, I'll give you a rip up the road next time I am there, dry tarmac needed as its a tad tail happy.
It is a strong engine this one now, my 6833cc motor even compared to the Crate LSX454 (7400cc) looks good, they are making just under 550hp on this dyno, so I am up 60-70bhp on those, maybe a little less torque under 4000rpm, but that really doesnt matter as tyres are struggling anyway, but the 454LSX is done by 6500 mine keeps going as you can see, still over 600bhp at 7500, i was scared to rev anymore, and pointless as peak is 7045rpm.
She sure does rev!

[Brummmie]

Byker28i said:

so can we read from that the 4.5 AJP is more powerful.... over 7000 revs

Have another look, the BHP Graph is roughly double.

[Brummmie]

Here is a 454LSX (7.4ltr) with a big intake (FAST) vs my 6.9ltr.

[Brummmie]

Richard has kindly mashed the data into his magic program, the actual fact is that the old motor did 202mph and 10.62/132, i have seen a 133mph trap before with a slower time, interesting to see that with my revs reaching peak power so much later it should now do 211mph!!