GN1 R or TA aluminum ported head flow numbers

ttypewhite

Well-Known Member
Joined
Oct 1, 2001
I am curious to see what guys have gotten out of these heads fully ported. Please post your numbers or flow sheets. Also please keep this thread on track, this is not a Champion vs TA head competition, or turn around time etc. Just raw data.
 

Boost231

What's An Intercooler
Staff member
Joined
May 26, 2001
I'll go first. TA SI heads
954e97bb5345c3f1384724bbf905087b.jpg


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ronviper

Member
Joined
May 3, 2005
CHAMPION GNR HEADS

INTAKE EXHAUST

100 66.3 100 50.8
200 113.4 200 113.4
300 189.7 300 156.8
400 238.5 400 182.3
500 260.7 500 194.0
600 261.7 600 199.3
 

87GN_Bart

Active Member
Joined
Jul 12, 2016
Steve your middle numbers are very impressive to me, should make good power with the right compression, cam and turbo combo. Congrats.
 

ronviper

Member
Joined
May 3, 2005
I would like to "THANK THE CHAMPION RACING HEADS GROUP" the beautiful work and awesome turn around time to get these heads. Tom has been in the hospital with heavy surgery and i WISH HIM A SPEEDY RECOVERY. Thanks Tom to you and your crew best wishes from Ron and family.
 

proptop

Active Member
Joined
Jul 22, 2011
Sir,
Are the heads in the photos ported or as cast? In addition any flow numbers and cost to duplicate?
Thanks,
Bob
 

87GN_Bart

Active Member
Joined
Jul 12, 2016
The heads are CNC ported by Champion and flow excellent for my needs, machined, ported , assembled and shipped within 1week.
 

87GN_Bart

Active Member
Joined
Jul 12, 2016
The cost would depend on what springs, retainers,valves, porting etc you want. Call Champion at ( 1-386-446-4488) if you would like to get a price, i was very pleased with the price i paid.
 

~JM~

Wrinkled Member
Joined
Oct 31, 2007
The cost would depend on what springs, retainers,valves, porting etc you want. Call Champion at ( 1-386-446-4488) if you would like to get a price, i was very pleased with the price i paid.

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