Beams velocity stack length tuning

[assassin10000]

Just out of curiosity do you have a copy/comparison of the staggered length dyno run? I understand what it 'should' do in theory, but I'd be interested to see what it actually did on your motor.


Andrew

[Tim.duncan]

We just revved it till it stopped making power which was 7500 the limiter is set at 8 but I'm going to lower it

I'm really impressed considering it's all stock including the exhaust headers

I'll have the graph of the 4 different length set ups soon, I'll post it as soon as I get it

[assassin10000]

Cool.

I personally would leave the limiter at 8k (stock is 7800 on a manual motor anyways). The extra 500 rpm could come in handy, instead of having to upshift then downshift before a corner it might let you get a hair more acceleration/carry your speed better.


Andrew

[Frak]

Tim, I'll do the printouts this afternoon including the staggered lengths.

Assassin1000, the staggered lengths did sort of what I was expecting, I was hoping they would widen the torque band with little peak drop, didn't work out exactly like that, they did sound good and look unusual though!

[AJPS]

yeah this is what i did

and my motor has stock pipes on it as well

[Tim.duncan]

I dident realize the stock limit was 7800 I thought it was 7

Good to know!

[assassin10000]

Yeah it's 7200 on the auto version and 7800 on the manual version, IIRC.

Andrew

[Tim.duncan]

How much timing you running Dave?

[Celica RA45]

you should be able to go as far as 28 ign timming with 26 at the top end
and tim how long is your inlet track now from back of valve
are you anywhere near 380mm

[AJPS]

I think im running 26

and tims will be same length as mine i guess?