I order a set of AFR's and was given the wrong heads. Not sure if AFR can get me my heads in time. I must be finished with the project by December and AFR may not be able to get me a set before I need them. Does anyone know what the trickflow 23deg heads flow at .400 &.500? I am sick about this whole deal with the AFR's. I really wanted them and i may have been screwed Anyhow, Trickflows are in stock and I can have them at my door in a week. This project must be finished by December.

 

Check out http://www.airflowresearch.com/Artic...e_archives.htm under flow to go, there you'll find some flow nbr's. I can recommend Canfield 195 cc heads www.canfieldheads.com they also is in the flow to go article.

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GTA -89:383, 4-bolt,Free flow muffler,dual 3" HF cats, Edelbrock headers, Canfield heads, 1.52 RR 7/16, ZZ-9 cam, Big Mouth, AS&M LTR, !plenum, 52 TB, MSD 6AL, TPIS level V prom, Superior shift-kit and all the minor mods,looking for a SR ...
http://www.itv.se/tacs/members_cars/m279/m279.html (Swedish Trans Am Club)

 

Try this link from Trick Flow. It's in Adobe. Look under Airflow chart.

http://www.trickflow.com/media/pr/pdf/23degree.pdf

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Mike

'90 IROC-Z , 5-speed, ZZ4, G1 Trick Flows
Moderator SEThirdgen

 

the flow #' are as follows

int. exh.
.40 223.77 169.80
.50 245.00 187.60

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87 IROC-Z
305 AUTO 2.73 OPEN REAR, T-TOPS, GUTTED AIRBOX, HOME MADE RAM AIR, AIRFOIL, UNDERDRIVE PULLEYS, ACCEL CAP & ROTOR, ACCEL COIL, TPIS WIRES, BOSCH PLATINUM PLUGS, JUST HIT 80,000 MILES