Search found 39 matches

by gran turismo
Sat Mar 27, 2010 7:43 pm
Forum: Exhaust System
Topic: Secondary Pipe Tuning???
Replies: 20
Views: 8080

Re: Secondary Pipe Tuning???

Is all the data output as raw data in rows and columns? I can't find a single graph on that site. Is it worth the money? Yea, all of the output is in rows and columns. It it worth the money? Well it gives you dimensions for several different styles of exhaust header and for the entire exhaust syste...
by gran turismo
Fri Mar 26, 2010 6:46 am
Forum: Exhaust System
Topic: Secondary Pipe Tuning???
Replies: 20
Views: 8080

Re: Secondary Pipe Tuning???

Mats,

You can see what my calculations are based on here, they are not stock cams:
http://maxracesoftware.com/bulletinboar ... f=11&t=372

Jeff
by gran turismo
Thu Mar 25, 2010 1:23 pm
Forum: Exhaust System
Topic: Secondary Pipe Tuning???
Replies: 20
Views: 8080

Re: Secondary Pipe Tuning???

My software came up with 1.303" dia and 26" long. Has anyone found the smaller primaries to be restrictive?
by gran turismo
Thu Mar 25, 2010 12:17 pm
Forum: Exhaust System
Topic: Secondary Pipe Tuning???
Replies: 20
Views: 8080

Re: Secondary Pipe Tuning???

I have been using pipemax ($40 at http://www.maxracesoftware.com) to design some headers for my 3.0 and here is what I have found: 1. The secondary pipe that you are referring to is commonly known as a collector. The collector length and diameter apparently has a big impact on the performance. 2. Wi...
by gran turismo
Tue Mar 23, 2010 12:25 pm
Forum: Engine
Topic: Balancing factor of the 3.0 12v?
Replies: 69
Views: 23896

Re: Balancing factor of the 3.0 12v?

I also saw somewhere where Greg Gordon had a 2.5 balanced to 51% with no vibration issues. Just for further confirmation, after I had mine balanced I talked to another more experienced machinist who told me that virtually all V6 and V8 engines, even wierd ones like a VW VR6 are balanced to 50%-51%. ...
by gran turismo
Thu Mar 18, 2010 11:39 am
Forum: Engine
Topic: Balancing factor of the 3.0 12v?
Replies: 69
Views: 23896

Re: Balancing factor of the 3.0 12v?

kterkkila, 60% blance factor is suprisingly high. High balance factor is good for high rpm but too high may cause vibration at low rpm. But if in doubt I wouldn't change anything if it was running vibration free in the first place. My 3.0 12V was also balanced to 47% but hasn't run yet. My memory is...
by gran turismo
Wed Mar 10, 2010 1:04 pm
Forum: Introduce yourself - Gallery
Topic: Hello!
Replies: 2
Views: 1297

Re: Hello!

Here are a few pictures.
by gran turismo
Tue Mar 09, 2010 1:54 pm
Forum: Introduce yourself - Gallery
Topic: Hello!
Replies: 2
Views: 1297

Hello!

Hi, I live in Portland, Oregon USA and I have a white 1985 GTV6 that I have owned since 1999. This car has the slightly cheezy, dealer installed Gran Turismo decal package, cloth interior, and no sun roof. Suspension work by the previous owner includes heavy duty front and rear anti-sway bars, heavy...
by gran turismo
Tue Mar 09, 2010 1:51 pm
Forum: Introduce yourself - Gallery
Topic: Hello!
Replies: 1
Views: 963

Hello!

Hi, I live in Portland, Oregon USA and I have a white 1985 GTV6 that I have owned since 1999. This car has the slightly cheezy, dealer installed Gran Turismo decal package, cloth interior, and no sun roof. Suspension work by the previous owner includes heavy duty front and rear anti-sway bars, heavy...