HP estimate and ET's

[89LX boosted cobra]

i have an 89LX. fresh motor with about 20k on it. bored .30 over with 30 over pistons. heads were reworked but not ported. i have a powerdyne supercharger bd-11a with a 9lb pulley, but only see 6 lbs on the gauge, 73mm mass air meter, bbk shorty headers, off road x pipe, 2 chamber flowmasters, bassani tail pipes, 190lph fuel pump, king cobra clutch kit, pro 5.0 shifter, ford racing starter, aluminum radiator, full length frame connectors, strut tower brace, caster cambers, eibach sportline springs, kyb gr2 struts, sn-95 brakes, with cobras up front, 99 cobra wheels with 245/45/17 tires. everything else is pretty much still stock, intake, tb, etc. with stock 3.08 gears. what would be my est HP and ET before and after smaller pulley to get to 9lbs of boost, and 3.55 ford racing gears?

[goodyear1984]

well i wouldnt expect too much with the mostly stock engine,yea you have boost but u have to move all that air and feed it fuel.with 6psi and stock gears i would say like 13.3 in the 1/4 mile.if u up the boost and i would go with 373 mabey 12.8.but thats if u have tires that hook..i wouldnt go with 355 the 373 will help ur 60ft a little more.if you had cam intake heads bigger t-body bigger fuel pump bigger injectors and a good tune then u would be really talking about some 11sec time slips..goodluck dude

[89LX boosted cobra]

thanks for the advise. really trying to stay as a decent cruising car with moderate power, brakes, interior, and suspension. but still be a good competitor. decided to not go the all out drag car etc. i also know i will eventually go with more power is the reason for the 3.55's considering all the torque the car produces. i'm eventually going with a good set of gt40's, or maybe work in a set of afr's. E303 cam, gt40 intake, and maybe a little spray. thanks for all the data!!!

[USMC302]

Be sure to put a T-rex in addition to your 190lph or second inline fuel pump on that car if you are going to stay with boost. You will run lean without it.

[89LX boosted cobra]

ok, thanks. i also have another problem. my car unannounced, will start to surge when idling. sometimes it idles great then just start to surge, then usually straiten back out. i noticed when i had the supercharger belt off, the car idled great and never serged. any ideas?

[USMC302]

make sure the throttle body is clean, with the new boost, it's been sucking more air than usual, make sure all components are clean, including the air filter for the S/C

[suprchrg'dstang]

Sounds like a maf problem to me... 73 mm C&L? try clocking the maf to a different position. Also get a tune and some bigger injectors.
I was making ~5lb of boost with my SN2000 blower. And with stock everything cept TFS intake and full exhaust. And 42lbs injectors
I made 300rwhp 350rwtrq.

I'd guess you are around there too