what are the lift numbers on the b303? i would get the trick flow spring kit. its working good on my 89. i have .538 lift and turn to 6800+ rpm. i think your b303 will be close to that lift with the 1.72 rockers. nice numbers by the way!
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1990 5.0 Mustang LX, SBF 357 (.030), Speed Pro Hyper Pistons (for now, 427 later ), Camshaft? well its changed again, Nicely Ported Pro Comp 210cc Heads, Edlebrock Super Victor Intake, Barry Grant 850 Demon Carb, MAC 1 3/4 Long Tubes, TKO 500, Spec Stage 3 Clutch, 3 row radiater , Black Magic Elec. Fan, 6 point roll cage , Custom throught floor sub-frame connectors, 5 lug conversion, Rear disk brake conversion, and some Mickey Thompson ET Streests. AKA YOUR BASIC DAILY DRIVER
I think that this car would have probably "planed out" horsepower-wise within 500RPM of when we couldn't go farther. It probably would have made around 275 or so... I was leaning towards valve float myself... I've seen it before on a 5.0L supercharged at around 5800 or so, and with brand new manley springs, they had just sat in the head assembled for a while before the guy got around to finish building and bring to us for the tune. New valve springs and the first pull was 6500 no problems... worked heads.
Chris Rose
Tillman Speed Inc.
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Tillman Speed Inc.
Custom Tuning | In-House Dynojet 224xLC
3344 Market Street • Suite C • Aston, PA 19014 Sales: (610)497-5776 or 497-3736 Out-of-State Sales: (610)497-3711 Service / Dyno: (610)497-9683 PREMIER DEALER:Edelbrock E-Force Supercharger Systems - Kooks Custom Headers - Magnaflow Exhaust Systems - MORE!
im not sure what to do either..this weekend im going to try to check the springs,but they have like 3k miles on them and id hate to take it apart for nothing lol..i dont know,i still think it may be something to do with that factory tach acting silly,but who knows
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92 lx 5.0 vert-,stock plastic airbox,stock T-5,shifter & clutch,stock 19lb injectors and fuel pump,no radio,speakers or cruise control..antenna delete(for less wind resistance)
(new)best so far 12.712 @ 105.99mph 1.752 60ft
Like has been said many times different dynos different results. But 260-290 seems to be about the average for those heads. I made 284rwhp/327rwtq with those heads and a tfs stage 1 cam with stock rockers. Here's the vid it was 103 degrees in the dyno room! But overall I was very satisfied especially considering I only paid 200 for those heads.
Keep in mind, he's still got about 500RPM of a slight climb in HP before it plains out... he might have gotten another 5-10 horses before she flattened and dropped...
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Tillman Speed Inc.
Custom Tuning | In-House Dynojet 224xLC
3344 Market Street • Suite C • Aston, PA 19014 Sales: (610)497-5776 or 497-3736 Out-of-State Sales: (610)497-3711 Service / Dyno: (610)497-9683 PREMIER DEALER:Edelbrock E-Force Supercharger Systems - Kooks Custom Headers - Magnaflow Exhaust Systems - MORE!
so i just ordered some valve spring shims and a fuel pump lol...
i guess im going to throw some shims in there,the clown at ford tech told me they recommend 125 at the seat,mine are currently like 118,so it could be floating,as well as the tach being half assed
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92 lx 5.0 vert-,stock plastic airbox,stock T-5,shifter & clutch,stock 19lb injectors and fuel pump,no radio,speakers or cruise control..antenna delete(for less wind resistance)
(new)best so far 12.712 @ 105.99mph 1.752 60ft
what are the lift numbers on the b303? i would get the trick flow spring kit. its working good on my 89. i have .538 lift and turn to 6800+ rpm. i think your b303 will be close to that lift with the 1.72 rockers. nice numbers by the way!
i currenty have the crane 44308-1 springs which yield 118lbs at the seat at 1.950" installed height
the TF spring kit yields 110 at the seat with a 1.800 installed height..that would make the crane springs slightly beefier
i can shim them down to around 1.85,run an even higher seat pressure,and still have more room than the TF springs before coil bind occurs
also this quote is direct from trickflows website:
"TFS-2500100---Will work with hydraulic roller camshafts up to 0.520 in. lift."
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92 lx 5.0 vert-,stock plastic airbox,stock T-5,shifter & clutch,stock 19lb injectors and fuel pump,no radio,speakers or cruise control..antenna delete(for less wind resistance)
(new)best so far 12.712 @ 105.99mph 1.752 60ft
That is A rpm Limiter hitting! valve float will flatten out and not drop as drastic! 110lbs on the seat and 300 over the nose will go over 6000 RPM's all day!I have looked at your graph and if it were valve springs it would have went flat first! you were still climbing. I have a engine dyno and that is what the graph looks like when we hit the rpm limiter.And i have a mustang that does the same thing around 5500 RPM's
That is A rpm Limiter hitting! valve float will flatten out and not drop as drastic! 110lbs on the seat and 300 over the nose will go over 6000 RPM's all day!I have looked at your graph and if it were valve springs it would have went flat first! you were still climbing. I have a engine dyno and that is what the graph looks like when we hit the rpm limiter.And i have a mustang that does the same thing around 5500 RPM's
sounds good,but the stock rev limiter is 6250,and he raised the rev limiter while tuning to 7000rpms,so thats not it
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92 lx 5.0 vert-,stock plastic airbox,stock T-5,shifter & clutch,stock 19lb injectors and fuel pump,no radio,speakers or cruise control..antenna delete(for less wind resistance)
(new)best so far 12.712 @ 105.99mph 1.752 60ft
Than I would check for a fuel pump cut off.If you look at your graph you will see that it was still climbing and write before it drops there is a little glitch in the run were it drops and then go's up. this could be from the fuel pump cutting off!ask your tuner can he check for a fuel pump cut off that could be connected to the RPM limiter?you might have moved the RPM limiter up but the fuel pump doe's not no it. If you look at your graph your peak power happened after the glitch which means it probably leaned out which will make more power before it melts. but in your case with it being an electric fuel pump with a shut off it can't melt because there is no more fuel from that point on. Just something to check before you tare you motor apart.
), Camshaft? well its changed again, Nicely Ported Pro Comp 210cc Heads, Edlebrock Super Victor Intake, Barry Grant 850 Demon Carb, MAC 1 3/4 Long Tubes, TKO 500, Spec Stage 3 Clutch, 3 row radiater , Black Magic Elec. Fan, 6 point roll cage , Custom throught floor sub-frame connectors, 5 lug conversion, Rear disk brake conversion, and some Mickey Thompson ET Streests. AKA YOUR BASIC DAILY DRIVER
