GN1-R's, Ported & Unported stock heads.

[rag231]

Bison, I agree 100%. My point was more aimed at the amount of money being spent to get to the nines with ported irons vs. the current GN1 selections. I had a car running 10.27 that had a pair of heads on it that I paid $600 dollars for with an unknown set of gold roller rockers. The 2nd owner did not know who ported them. I was the 3rd owner. When a pushrod and valve was bent on #4 cyl., I had the valves replaced, I ordered a set of 1.77 valves and they did not fit. The cylinder head shop said that they were bigger. They were a set of heads that ANS Performance had worked and sold that had the 1.8+ valve size ( I don't remeber the exact size at the moment but the paper work is at home). Those heads are ( from 1992-93 the year that they were originally ported by a local NASCAR teamshop for $875) a little tired and have close to 100,000 miles and needs to be refreshed. Valve spring and cam technology is much better now also. You beat me to the punch on the last set of Champion heads that were for sale on the board. I am still looking for the ANS receipt from early 2000.

 

[kjizzle]

These pictures don't work anymore. The links are bad. Turbo1dr, can you fix it?

 

[twin 93 svt]

These pictures don't work anymore. The links are bad. Turbo1dr, can you fix it?

These are my ported GN1 #'s with out moving valve location.

100 lift intake 64 exaust 52

200 lift intake 143 exaust 115

300 lift intake 206 exaust 149

400 lift intake 237 exaust 181

500 lift intake 244 exaust 197

 

[horndog]

Here are some pics comparing Champion ported irons vs GN1Rs

 

[Turbo1dr]

I've uploaded the pictures again to my personal site just to get the pictures to load back on this thread. They should be working again.

 

[Pronto]

When you can see those ports close up and compared, it's really amazing the stock heads support 11s.

 

[T-type Jones]

So how much do you want for the heads

 

[Turbo1dr]

So how much do you want for the heads

I don't have the iron heads anymore and I'm still using the R's on my car.

 

[forcefed3.8's]

When you can see those ports close up and compared, it's really amazing the stock heads support 11s.

Stock unported heads and stock cam have been 10.2s@129. Just proves that big flow isnt everything.

 

[Pronto]

Yes, that is very impressive.

 

[Mr.Spool]

Stock unported heads and stock cam have been 10.2s@129. Just proves that big flow isnt everything.

Yup!they sure do!

 

[Turbo1dr]

Stock unported heads and stock cam have been 10.2s@129. Just proves that big flow isnt everything.

Nope but pressure is.
View attachment

 

[krazy86t]

Champion GN1 Intake (not production unit) - Stock Ported Intake - Unported Stock Intake

struggling to find these pics of the ported intakes and heads - still posted somewhere?

 

[Turbo1dr]

struggling to find these pics of the ported intakes and heads - still posted

 

[krazy86t]

Thanks - helpful! I hoped to find pics for stock ported intake runners and how much material is removable inside of the gasket match; sort of like the head runners shown in these pics with the back-light quarter. A few of the images show "image not found"