ok guys i jus got my car back and its a 1998 c5 auto and i got put on it a 3600 stall , cam 242/244 612/610 112 lsa and valve springs the double golds also trickflow push rods and a asp underdrive pulley 25% ok and i got a tune so the shop tells me i made 313hp so please tell me the deal about this what u think? and my car was jus stock till i got these parts put on.

 

oh yea but they said when i get headers and intake ill be a 400 sum hp lol come on now!!!!

 

From my experience, something does not add up. You possible need a second opinion.

Mike

 

no chart or print out of the dyno run? 313 is less than stock hp.

 

yea i kno i dont get this

 

That makes no sense. What kind of dyno? How does the car feel, stronger than it was when stock or worse?

 

way quicker then stock she pulls hard

 

Hey Will, its going to feel alot harder out of the hole do to the stall, but over all, its only alittle faster, right?

I am sure LT headers and a 3" offroad x-pipe and mid-pipe would help alot but not 87 rwhp, like they said.

Mike

 

Sounds like a problem with their dyno.

 

well i do think its 313 rwhp which not to the crank so crank is more

so tomarrow ima have them to email my dyno sheet

 

yea mike it a lil faster to me, but maybe its jus me im look for to much power that aint there

but my buddy that was with me say its fast as crap and way faster befor and he can tell a difference

 

Just off the top of my head:

The number you received as probably 313 rear wheel horsepower. This equates to about 380-385 horsepower at the crank. (If you factor in approximately 18% in drivetrain losses.) It also depends on what kind of dyno they used. Mustang Dyno's read lower than Dynojet Dyno's for the same car... so your numbers may be higher/lower than that by up to 10% or so.

Unless you changed it, your car has a LS1 intake vs. a LS6. It doesn't flow on the intake side like it should with the cam you picked. You might want to upgrade to the LS6, or a FAST intake.

You didn't mention if you had long tube headers. If you are running stock manifolds, you are restricting your flow for the cam you picked. Same holds true of you have stock cats and exhaust.

Seeing that we are on the subject of the cam... it's WAY too big for this application if you don't have the supporting mods. With a stock intake and exhaust, you probably should have gone no bigger than a 224-228 on a 114 LSA. Maybe a 112 LSA if you wanted it choppy. Anything bigger than that, and you are losing low end power while moving the overall power 'band' too high in your RPM range.

One last thing: A 3600 stall is probably going to make your overall HP numbers look low. While it's going to start to engage below 3600 RPM, it will not be transferring full power to the drivetrain until the higher RPM's... and unless you have bumped your rev limiter and shift points to 7000 RPM, you are now limited in the RPM range where you can deliver total power to the wheels.

Total average horsepower and torque (area under the curve) is much more important than any 'peak' numbers you get. Unless you just want bragging rights.

Hope this helps.

Mark

 

Is it a Mustang dyno? If so, that would partially explain it. Did they do a "before" pull so you could see the relative gain?

Stock heads and stock exhaust manifolds are going to limit your gains from a cam upgrade.

 

I would think that the cam alone was not a good idea. You need to flow more air in with this cam as well as exhaust it out. Change the intake as well as a set of LT headers and you will see a difference. Also that 313 is probably at the rear wheels and not the crank.
Keep us posted.

 

There is some good info in here from the guys. You need to bring in more air and push out more air. The only way you can do that is by changing your stock intake to the LS6 or something similar, but also get yourself a set of long tube headers so you can get rid of the exhaust. You are going to be surprised with those two mods alone to help that cam work better for you.

GL

 

thanks ur a big help guys but i have no intake manifold or headers jus slp exhaust. and theres nuttin wrong with the cam i luv it but ima get me a varam intake and some long tubes and i wanted to try a weiand intake manifold??? what ya think?

ok i want all the power i can get out of this cam so please tell me what to do and what i need and what i need to tell the shop to do to my car????? like i said i want my all over power!

also i got all my parts from hpe and these are the parts they said i need with this cam so can u guys help me get all the power it suppose to give me

 

dont kno what type dyno! but there goin to send me my dyno sheet tho

but th car do pull good from 0-120 but after that its not so strong like when it was stock ill have her at 150and 160 and she pulls good

 

Hey Will, if you remember what we talk about, that cam is way big for stock cubes but i no thats what you wanted for it to sound really awesome and I am sure it does.

Lets get you a good cold air intake and a FAST 92mm with some larger than stock injectors and for sure some GOOD long tube headers and mid-pipe, Ok.

Call me at the shop tomorrow, if you still want that Nitrous kt, Ok
1-864-268-6820

Thanks
Mike Yeager
Eastcoast Perf. & Corvette's
1-864-268-6820

 

ok buddy thanks man and yea u need too hook me up hahahah

but guyz im stuck i was jus about to buy these ccw classics which i might still get but i could take dat money and get the parts i need omg guyz i jus dont kno what to do i got the money jus dont kno which way to go.

then later i wanted to get a 408lsx so what should i do but im goin to still use the same cam but im sorry guyz my mind is jus everywhere

 

Yeah you def need better heads, ported fast 90, ported ls2 TB and Long tube headers to get the most out of that cam. That is a big cam for a little 346 ci motor.