Came Across Graphs Of Sean's 8v Engine

[B1ack_Mi16 67]

Seem like he's been doing some testing with two different camshafts on the longmans head.

For sure his 8v seem to make really good power. But 205+ bhp, is that really likely on an 8v engine which doesn't rev more than to 7500rpm?

 

Almost wants me to try to make an 8v one day, although I'm a 16v freak

 

 

[Sandy 189]

200pst BMEP at peak torque, it's not out of the question, unusual for an XU 8v, but what I would expect from a proper TU 8v. But you can see the price paid lower down.

[huckleberry 0]

If it's pure for trackday driving it's a rather nice engine I'm sure. Very high figures and in the range you serious trackday drivers use. But for an everyday car it would make you mad I guess. Up to 3000 or 4000 rpm no-one is home. I'd rather have a mi16 of GTI6 then as they're more everyday usable or dare I say it, I'm still impressed with the one Dave build him. Over 160 bhp and torque everywhere. For an XU 8v that's impressive I think (yes I know I'm not an engine builder). I hope this engine will last and he'll enjoy a lot of trackdays with it as that's the reason one builds these cars.

[welshpug 1,627]

200pst BMEP at peak torque, it's not out of the question, unusual for an XU 8v, but what I would expect from a proper TU 8v. But you can see the price paid lower down.

 

quite possible, but:

 

the low down torque figures are just not present, so looks like it has none which isnt the case. These are preliminary graphs, i expect the finished results to be even better :-)

[Dj_mini 7]

Any idea to the reliability of the figures?

[Sandy 189]

quite possible, but:

I mean down as far as we can see (4000 rpm), I wouldn't expect a heavily tuned 8v to be delivering below that, even if it did, it wouldn't be relevant.

[B1ack_Mi16 67]

When talking about BMEP, what's a good value for a highly tuned 16v XU?

 

I calculated for the 2.3 litre and got 215lbin^2 for max torque, but I'm not 100% sure what the max power is, just that it measured 250bhp @wheels (which probably is too much) and I have assumed it's approx 270bhp max in the engine so have just multiplied all values from dynodata with 1.08.