ARAB

iTrader: (1)

i just put my car on the dyno last night at school and only did 291 hp 298 tq.....

Attachment 457156

here is my car info:

2000 Camaro SS
A4 built with shift kit and baby 2400 stall
3:73 gears
TSP 1 3/4" LT headers
TSP 3" ORY pipe
custom cat back with 10 series flowmaster
LS6 intake with 36lbs injectors
MTIRacing ported and polished throttle body
ported and polished MAF
K&N ram air intake set up
SLP U/D pulley
and a street tune

i am going to install my 243 heads which will be getting ported and polished, ms3 cam and yank ss 3600 stall, but now I'm debating about going any further because I'm trying to pass the 400 rwhp, and so far i don't think the head and cam swap is going to help me that much with these numbers, my instructors at uti said that those are normal results because stock ls1 put down about 260 rwhp...????? but everyone on here claims that those mods should put me in the 350 rwhp range... unless I'm reading it wrong, so I'm confused and disappointed because i got clowned when i really thought id be above 330 rwhp when i didn't, and another thing that gets me is i raced a 331 stroker foxbody that claims he putting 350 rwhp and i took him by about 2 cars... so please if anyone can help me out with advice/info or see if the dyno wasn't set up properly, anything that can bring me to a better mood will be appreciated.

1320Chicken

iTrader: (4)

A dyno is strictly a tool. I wouldn't put all my faith in dyno numbers. If they are claiming they see 260 from ls1 cars on that dyno then your numbers are in line I'd say. It's just that dyno. Not all read the same. Hell the same one won't give the same results from day to day.

Check afr and timing, take it to the strip and run it. Trap speed doesn't lie.

ARAB

iTrader: (1)

thanks for the insight i will check my air/fuel ratio and take it to the track and see what it does, hopefully this weekend, its really getting to me

Paul Bell

iTrader: (9)

My otherwise stock engine (with stock exhaust) made about the same numbers as yours did. With about 180,000 miles on the clock.

These numbers are a bit low for these engines but as stated above, dyno function can have an effect on the readings. These cars with the automatic should produce around 300 RWHP. I would think headers and no cats would help you see about 320 but you'd need a cam and tune to take full advantage of a better flowing exhaust.

What was the air temp when you did this? How many miles on it?

ARAB

iTrader: (1)

air temp was 87.47 degrees 19% humidity and about 162,xxx miles

madmike9396

iTrader: (29)

dyno is simply a tool like mentioned ! run the bitch at the track, that will tell the real story

Paul Bell

iTrader: (9)

Yeah....for that air temp and vehicle mileage, your numbers aren't that far off. Just a bit on the low side but that's what these cars usually do. Anything in the range of 290~310 RWHP is the norm.

Consider the amount or wear piston rings/cylinder walls have and PCV oil contamination in the intake tract and possibly on the backsides of the intake valves slowing down the airflow.

Paul Bell

iTrader: (9)

If it makes you feel any better, a factory stock 1970 Chevelle SS454 with the 450 HP LS6 engine puts down 290 RWHP.

ARAB

iTrader: (1)

i hope thats the case I'm really looking forward to this head and cam swap

ARAB

iTrader: (1)

lol that helped i also noticed that he cut my graph line at around 5250rpm which is about 1000 less before it shifts would that be his fault or does the program edit the final results

Paul Bell

iTrader: (9)

Naaa, those little mods don't really gain much. An underdrive pulley might make the engine run hotter. The headers would offer the best gain but they work with a better flowing engine.

This just tells us he doesn't have that power. Now go tell him your dyno results.

That's a step in the right direction. Get a proven package from one of our sponsors. Don't forget lifters, rockers with bearing trunnions, a FAST intake, timing chain, the list goes on.

ARAB

iTrader: (1)

i just ordered all that stuff ls7 lifters, ls2 trays, ls2 chain, mlx gasket, melling oil pump, trunion upgrade, lunati dual 660 spring kit, manley valves and so on money ran out and now I'm waiting so i can afford all the fluids and tune before i install

Paul Bell

iTrader: (9)

Sounds like you've done your homework and you're well on the way. Good luck and keep up posted.

Consider a 180 thermostat and a tune to get the fans on lower.

ARAB

iTrader: (1)

thanks to everyone on this site i know what to buy, will update once i solve this issue, thank you for the info

big hammer

a 1970 would still have been rated on the gross HP rating.

JRENIGAR

iTrader: (37)

I wonder how a stock LS1 fbody would compare to this on the same dyno?

big hammer

probably similar. in 1970 engines were still rated on the gross system. so no air cleaner, exhaust, etc. in 1971 they switched to the net ratings so the engines were rated as it would sit in the car, complete. this was a big part of the hp ratings drop for 1971. lower compression was another. but the actual output wasn't nearly drastic as people thought it was.

99Bluz28

iTrader: (35)

IMO, it's nice a see the big dyno numbers, but all they are is reference numbers used to get your tune dialed-in for the best performance from you engine. With the way it performed against that Foxbody it sounds like your performance is about where it should be, don't sweat it!

Now if you really want to mess with the guy driving that Foxbody make sure you tell him you car only put out 291 hp 298 tq on a dyno, this will have him thinking something is wrong with his motor.

ARAB

iTrader: (1)

lol yea i want to see his graph because he got me on take off but i took him once i caught traction, I'm also going to another machine with my tuner he can't believe it either, check out the video its only half but you can see take off pretty good

Attachment 457267

7GRANDGERNADE

Why did he cut off the graph at 5250 ?post it up
Ms3 and the 3600 stall and a good tuner with your other mods will get you to 400 easy .