Happa

iTrader: (1)

I have the G5X4 in and had only a street tune. I went to a dyno Sat and put down 391 rwhp and 382 ft/lbs. Does that seem low? My mods are LG Pro lt's, no cats, B&B bullets, CAI, stock heads, and stock manilfold. Its a 99 6spd coupe. w/ 70k miles

I ran a 7.4 @ 96 in a 1/8 and I kinda figured if I ran that shouldnt I be making more power to turn those times?

Plus a good friend had the same exact set up but with a G5X3 and had a dyno and street tune and made 415 rwhp and 391 ft/lbs. I know ever car is different but a bigger cam should make more power.

My question is should I get a Dyno tuned to sqeeze some more or is that it?

Thanks for input

jbusmc1986

iTrader: (1)

Is your car an auto? Otherwise yes that does sound low... if it was an auto was your convertor locked?

Happa

iTrader: (1)

I have a 6 spd. I kinda figured that was low. Do you think if I go to a tuner and get them to tweek on it should pull some more?

Larry

iTrader: (4)

I ran a 7.072 with a 95.82 mph 1/8 et. Sounds like you are just not launching very hard. You should have more than a 7.4 with that mph. What 60'? What gear are you running?

PA Z06

Does seem low, my only mods are LG street series, breathless CAI, and a tune.

scramblerman

iTrader: (16)

Definitely get the car dyno tuned! A street tune is no good for a cammed car. You should be at least 425rwhp if not more with that big of a cam.

Blacked Out

Agreed those numbers are low and you need a dyno tune!

SAM98WS6

A bigger cam will run worse without a tune. Why would you dyno without a proper tune? Did you measure A/F?

scramblerman

iTrader: (16)

btw I am thinking that 99 vettes had the LS1 intake, not exactly sure on that. Put on a LS2, LS6 or fast LSX-if you can afford it. That will get you 15-20 rear wheel extra ponies too. Then dyno tune it.

Azrael

iTrader: (10)

I don't know why you think your numbers should be that high with stock LS1 853 heads and a LS1 intake manifold. I think 391 is very respectable number for your car! I would agree your numbers would be low on a LS6 (Z06) but that is because of the better heads and intake.

Happa

iTrader: (1)

No i wasnt launching it hard, afraid to break somethings. Not sure what my 60' time was never got a time slip. Im runnin the stock gear.

I had called LG them selves and they said thats very low for my Coupe. I need a dyno tune to get the right power my car should be making.

I didnt know the Air/fuel ratio, my friends vette with the same set up but had the G5X3 made 415 and ran 93 mph. I know every car is different but I should at least make close if not higher. Im probley going to get a LS6 intake and get a dyno tune. Thanks everyone for the inputs

Happa

iTrader: (1)

Heres my dyno sheet

Pewtavert

I agree! Thats about 100 RWHP for a cam and LT's.....not too bad. A set of heads and a free flowing manifold would put you in the mid to upper 400's.

Happa

iTrader: (1)

I only gained 60 rwhp and 40 ftlbs with cam and LT's. thought you'd get more out of that. O'well time to spend more money so I can reach my goals.