Tuning questions
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From: REDMOND OREGON
Tuning questions
I have a 383 stroker with comp cam[***** Thumper] 1.6 roller rockers,TPIs mini ram, 52mm tb ,TPIS headers, HEI/hypertech,2400 stall speed conv. 373 gears. I am going to use ngk fr5 plugs with 8.5mm wires. NEED TO KNOW fuel pressure and plug gap. THANKS 
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Team Owner
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From: Hartford WI
http://corvetteinjectors.com/calculator.html
Le Mans Master
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From: WV
I believe what he meant is he put the stock prom back in,not the stock injectors back in............. Im also running #24 injectors in my 383 as per Jon at FIC , I have 10.25 to 1 compression and Im running FR-5 plugs, if you have 9.5 to 1 compression FR-5 plugs may be a little to cool for your motor and you may want to run one range hotter.....My fuel pressure is set at 43.5 with the vacuam line pulled.. My plug gap is set to the factory spec of .035 and that gap will work fine with 9.5 compression...Some guys keep opening the gap on the plugs to get a little more power, but I found the stock setting or just a few ticks above stock (.037 ) works fine without having to play with the gap...Good Luck...WW
Last edited by WW7; Jan 14, 2012 at 08:20 AM.
Team Owner
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From: Hartford WI
Interesting. How much power are you making? On the dyno, I made 410 RWHP which translates to no more than 500. Using that figure with a duty cycle of 80% and 0.5 BFSC you need 39pph injectors
Le Mans Master
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From: WV
Im no where near that , I have about 385 at the crank..Jon says #24 lb injectors can handle this and Mick Stevens agreed ...WW
Last edited by WW7; Jan 13, 2012 at 07:32 PM.
Team Owner
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From: Hartford WI
Holley Stealth Ram, 42# injectors, AFR 190 heads, 1.6 intake RR and 1.5 exhaust RR, 230/236 - 110 lobe sep, 108 intake centerline (2 deg. advanced), TPIS Long Tube Headers, Random Tech Cat, Borla exhaust, Rossler Trans, HiTech Motorsport tuned ECM.
Le Mans Master
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From: WV
.. ..WWMods
Pete Kane 383 Stroker w/Dart-180cc Pro 1 heads-Yella Terra 1.6 alum rockers-Erson 218/226 cam-Mega Ported Plenum-Accel high flow runners-Edelbrook High flow Intake-Stage 2 700r4 trans-EGR and AIR Delete Dewitts Radiator+Fan-Hooker headers-Blowerworks MAF sensor-Custom Mick Stevens(mseven) tune.
Last edited by WW7; Jan 13, 2012 at 07:45 PM.
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From: REDMOND OREGON
I live in bend oregon NO ONE any where around here has a dyno. closest place is portland/vancouver area. If anyone knows of someone reliable in that area i would be grateful for the info.
Race Director
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From: moraga ca
I was between you two when I had my 383. 10.4 compression and ran 30 lb injectors. Shifted at 6300 and ran low 11's. With my 406, I'm running 12.5 compression and 36 lb injectors. Both motors with the regulator at 42 with the hose off. I guess there is a wide range of tolerance.
Le Mans Master
Joined: Aug 2007
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From: WV
I was between you two when I had my 383. 10.4 compression and ran 30 lb injectors. Shifted at 6300 and ran low 11's. With my 406, I'm running 12.5 compression and 36 lb injectors. Both motors with the regulator at 42 with the hose off. I guess there is a wide range of tolerance.
..WW
Last edited by WW7; Jan 13, 2012 at 07:59 PM.
Le Mans Master
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From: WV
Marvin, Some of the bigger car shows now have portable Dyno's.. They always have one at Corvettes of Carlisle" near my home..Check out the bigger shows near you to see if they have a Dyno...WW
Team Owner
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From: Hartford WI
