TPITuned Port Injection discussion and questions. LB9 and L98 tech, porting, tuning, and bolt-on aftermarket products.
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I'm doing a mock up of my engine and Dyno2003 needs to know TPI cfm flow @ 1.50 inHg.
I've got a TPIS 52mm TB, Air Foil, stock plenum, SLP runners, and an Accel base. All of them are port matched to each other perfectly.
What would you guess it would flow?
Thanks!
__________________ www.TheFoat.com/92GTA1992 Trans Am GTA SLP: GMPP optioned "SLP Performance Parts Package" GTA, 220K Miles, Dark Jade Gray Metallic, LB9, 4L60, T-Tops, and Gray Leather. Documentation includes Window Sticker, Factory Invoice, Etc.
I'll take a wild guess and say 225 CFM. I have seen where the stock ACCEL base flows 251 CFM. The ACCEl cast LTR flow at 242 CFM and I believe the SLP may be slighly less. So all bolted together with the stock plenum is my guess of 225 CFM. Allen
Umm, no, the induction flow they're looking for is at the throttle body, not the intake manifold. Guess around 850-900 cfm with the 52 MM throttle body. (though your intake tract before the TB could lower that)
__________________ Back in business, working on the Formula again. 409 Stealthram, 58mm tb, Ported systemax 2 heads, custom cam, 32lb injectors, 2 stage NX kit 250 total shot. Torque arm, control arms, lca's, panhard bar, headers, exhaust, etc etc.
Expanded 6E tunerpro Definition file available at
[http://home.comcast.net/~rhuarc1/pwp...6Eexpanded.xdf
Was, rhuarc30, moved to Il, L98 iron head part 4 finally up. Check it out on the TPI board. http://www.thirdgen.org/techbb2/show...hreadid=183264
The default value Dyno2003 put in there was 300 so I kinda thought
1989GTATransAm wasn't too far off there but it makes since that they would want the TB air flow, just like a carb cfm air flow you know. I put in 850 and the power curve looks a little more "realistic" now...
__________________ 1989 Pontiac GTA Nighthawk, 389 CID TPI, 448 HP 485 TQ. Vigilante 2800 stall Converter and TCI Steetfighter Trans. Spohn Suspension. 4th Gen. wing and hood, 92 GTA GFX front wheel back.
1/4 mile 11.742@117.8 on Drag Radials 12.22@118.0 on street tires, top speed over 180 mph.
Allen 
