head work

Blk-Jet · Post by **Blk-Jet** » Wed Jan 07, 2004 10:04 pm

hey guys,

Hi-tech Engine Services in Preston will be performing a 3 angle valve cut and valve seat lapping for approx $250. Anyone wanting this done needs to have there heads off by the latest next Thrusday so we can save some cash as a group thingy.

Cheers

p.s. yes there are noticible gains in doing this, followed by porting which will increase Hp by atleast 10-15 (educated guess)

Blk-Jet · Post by **Blk-Jet** » Tue Jan 13, 2004 11:10 pm

hey guys,

just updating you, i've started the porting work on my heads tonight, will have some pics and all the info, specs, dimensions etc all posted up when complete so you can do a DIY port polish job and save a bundle!

ruchi · Post by **ruchi** » Tue Jan 13, 2004 11:16 pm

Have you done a dyno test to set a benchmark, so you can see what improvements the modifications make?

Blk-Jet · Post by **Blk-Jet** » Tue Jan 13, 2004 11:29 pm

I never went to a dyno before, It would have been good to know exactly what figure i was getting, but i'm going to take the average of what i've been hearing which is about 90kW at the wheels for the 96 gpx.

Anyone think different?

ruchi · Post by **ruchi** » Tue Jan 13, 2004 11:32 pm

From what I understand, there is no standard calibration for dyno's, therefore if you took the same car to 3 different dyno's, you'd get 3 different results.

It's important when doing modification to always take it back to the same place, with ideally the same conditions, only then will you truly be able to tell if they modifications have made a difference.

If you are going to do a number of modifications and want to see what they yield, it is best to do a dyno test before you begin to set the benchmark, then as you go along you have something to compare it to.