Thread: GTiR 54C head flow data

I got another stock GTiR head the other day and decided to stick it on the flow bench. I've flowed a mildly ported one with a good valve grind but never a stock one. The exhaust flowed the same as all the other DET's out there... pretty crappy. the intake was great though.

@ 28"

.050" - 48cfm
.100" - 91
.150" - 135
.200" - 169
.250" - 200
.300" - 215
.350" - 230
.400" - 241
.450" - 249
.500" - 253
.550" - 254

Flows a lil better than a stock Low port head but much much better than a stock Highport head....

Exhaust only flows 170 @ .500"

nice do you have flow numbers for a stock low port vs high port

ive always have love for the lowport motors with my back yard experimenting ive found to make more power with them but every one loves highport motors for some reason

yeah, i'm not sure why highport motors are loved. that head is only designed after a 54C head and they had to modify it for a HLA instead of the 54C solid ones.

highport head only flows about 205cfm @ .500"
Lowport head flows around 245 @ .500"

thanks very much i always suspected that but these people on the forum no offense love to go by word of mouth and not try things them self.

this mean i should get to work on these bowls in my low port head

I have a DET lo port S14 head on my DET in my truck that flows 275cfm with stock valves IN and 210 CFM exhaust. just good simple port work with a killer valve grind.

nice ill just be cleaning up the castings minor deburring and lil work in the bowl nothing too fancy!

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I'm guessing this is the head only, rather than head and intake manifold? What are peoples thoughts on using the GTiR throttle bodies with the 54C head for an allmotor aplication?

You mean something like this??



hehehhee...

Cheers,

Yea, pretty much