...got everything installed....seems to have lost some low end power....a noticible bit.....anyone know why? timing? still havent got headers yet...so maybe that has something to do with it...anyone that has my setup please help....i also would like to up my fuel pressure but what do u think i should put it at??.i also want to install maybe a in car fuel pressure gauge...for nos later one....how could i do this?
thanks nathan

 

'course it's gonna lose low-end power.. adding to high-end power like that means sacrificng low-end power. If my understanding is correct, loss of air velocity due to the larger passages in the intake and the insanely higher lift and duration of the cam is the cause in this particular case. To my knowledge there's no real way to get it back without forced induction, but I really hope someone corrects me there

At any rate, your upper end gains should more than make up for the low end losses.

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'88 Camaro, hunter green metallic, T-top
LO3 305 TBI/700r4
Performance mods: MSD Coil
Audio mods: Pioneer DEH-P3000, Pioneer 6x9s, Optimum 260 watt 3 channel amp driving 6x9's, prepping to build sealed glass sub box for single 12"

'86 Camaro, ultra silver metallic /w dark blue metallic racing stripes
2.8l MPFI/700r4 /w special 2nd gear delete option
Misc Mods: Cut air box, '83 Firebird spoiler.
Performance Parts: Accel 8mm wires, SplitFire plugs, Gabriel hijackers, poly swaybar bushings.

My Homepage, with pics.

 

It might be the fact that you have other bottlenecks in the system. The headers should help.

I could tell no loss with my LT4 swap, only gains..but I have other mods and chip tuning.

What other mods do you have?

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91 RS 5.0 TBI....LT4 cam....Edelbrock headers....3"Dynomax exhaust....5spd.... 3.08.....Ultimate tbi....afpr...ZR 255-50's...Koni's

 

I have a diff rear end....semi posi....shift kit....edel tbi intake....96 lt1 cam....soon headers.....open element...msd blaster coil....but i mean most noticible power loss...is when i power brake it.oorr or just punch it......the wheels spins and gain speed slowly....but i had it better with b4..then i adjusted the fp and timing some...maybe i messed up....could so one give me some tips on tuning
thanks

 

With that major of a mod, you'll probably see a big benifit if you get a custom chip burned, or burn one yourself.

 

Did you line up the cam, and the crank correctly? You know, lining the two dots up on the timing chain sprockets?
An LT1 cam is not THAT big of a deal. It has a whopping 204/210 duration @.050" I forget the lift numbers.
I know my cam doesn't have the aggressive lift that a roller cam does, but I got the 206/212 @ .050, .425/.442 lift. NO loss of bottom end power...

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Black 1983 Trans Am
350 Cross-Fire Injection
T5 World Class
3.42 Locker
7747 ECM
Flowtech Headers
!Cat
Factory 98 WS6 muffler (oval tip)

 

Provided that everything is installed correctly and it seems to be running OK,do the headers/free flowing exhaust mod.Then tune the whole package.You will see a big gain from the exhaust mods,and you will need to tune anyway then.
Good luck,Dave

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92RS LO3 700R4
open air element
ultimate TBI mods
LT1 cam
Edelbrock TBI performer manifold
180 thermostat
Hooker headers
3"cat back
Zexel Torsen posi with 3.42 gears