627 bhp (611.9 corrected) at Emerald
Discussion
Brummmie said:
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.
All good stuff, especially with another red TVR claiming to be able to be capable of more than 200mph Is that a lower LSA than before then? (Still on standard GM rockers too?)
I'll feed the new graph into CarTest (or you can email it if you still have my addy?), and see how it compares to the previous (which was 580bhp if I remember correctly.)
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/
http://www.clbraking.co.uk/
Brummmie said:
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
Hi Paul,For the hoot there is a 4.5 Cerbera for comparison
Was good that you attended the WWM meet last month, car looked and sounded spot on in all fairness,
Hope you achieve the power and performance top speed desired.....
As discussed it wouldn't mind a run down the M-Mile, been in Macdebs 450 turbo and Blacpiepauls LS7 (now LS9) .....Snookeses LS3 ......be good to do in the dry though!
From those graphs :
612hp/6.9litres = 89hp/litre
370hp/4.5litre = 82hp/litre
and I don't think anyone would argue that the cerbera head work is, erm, somewhat agricultural so I don't think the AJP is doing too bad.
If it was a 6.9 ajp it would be making near enough 570hp OK so that's a straight scaling up from the capacity, and you never get a proportional gain from just upping the CCs, but (hypotheticaly) if you did it on a bigger bore, moved the valve centres etc etc it's not unbelievable that the ajp would win outright ...
or look at it another way .. scaling the capacity down , a 4.5litre LS would be making just 400hp*
again, taking big liberties with the maths / airflow / rpm
612hp/6.9litres = 89hp/litre
370hp/4.5litre = 82hp/litre
and I don't think anyone would argue that the cerbera head work is, erm, somewhat agricultural so I don't think the AJP is doing too bad.
If it was a 6.9 ajp it would be making near enough 570hp OK so that's a straight scaling up from the capacity, and you never get a proportional gain from just upping the CCs, but (hypotheticaly) if you did it on a bigger bore, moved the valve centres etc etc it's not unbelievable that the ajp would win outright ...
or look at it another way .. scaling the capacity down , a 4.5litre LS would be making just 400hp*
again, taking big liberties with the maths / airflow / rpm
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)612hp/6.9litres = 89hp/litre
370hp/4.5litre = 82hp/litre
Edit: thanks to your mapping skills
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
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)612hp/6.9litres = 89hp/litre
370hp/4.5litre = 82hp/litre
Edit: thanks to your mapping skills
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
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!
Gassing Station | General TVR Stuff & Gossip | Top of Page | What's New | My Stuff