jpr210

Im confused

Just finished getting my car tuned on the dyno with the following:

TEA 241 casting cnc heads

Lunati Vodoo cam: 262/268, 212/218@.050 .531"/.531"Lift,113/109 LSA/ICL 1500-6500 power range.

Headers +plus a 3" exhaust all the way to the back.

K&N fiilter with a 4" intake pipe.

I think but Im not sure if I have an LS6 plenum and stock throttle body. I got 338rwhp/343rwtq with a 13.1 afr across the board. Smooth curves without dips or peaks; they look text book.

Now, I was thinking that the above combo would put me close to the 375/370 mark but I dont know what would be holding me back. The engine is strong, with only 10K miles.

Any ideas apreciated.

Thanks

Jpr

BlkHwk

iTrader: (8)

What kinda dyno? Mustang?

VENGEANCE

You have TEA heads and a decent cam for an LS1 and you only made that? That sounds to me like theres a HUGE problem. With that size cam and heads you should have EASILY made in the 410's-420's, if not more......

Even if you are an auto car, you should have made 380-400......

1WICKDZ

iTrader: (2)

A4 or M6?

jpr210

Dynojet, engine is a 2001 z28ss motor. Short block is clean, no smoke, oil use or noises. I have noticed that it stumbles when you start it from being parked it takes a couple of blocks "get it together" and it runs smooth as butter after. Could it be that I have a bad lifter? (all new BTW comp 850's).

Jpr

Black Plague

iTrader: (13)

212/218@.050 .531"/.531"Lift Thats a verry small cam!

jpr210

Ok, but Im getting stock LS6 numbers and Ive got a bigger cam, freer flowing heads, headers, exhaust, intake and a dyno tune!

Jpr

Doomsday

iTrader: (8)

That is a small cam and you posted this thread because............

GR33N GoblinM6

iTrader: (14)

geez.. thats odd... i have 325rwhp on a dynaPack system, which report lower than any dyno.. and im using a fully stock 98 LS1 engine.. just full bolt on exhaust (with shorty headers to boot) and a performance tune from SpeedINC.

who is doing your tuning??

Azrael

iTrader: (10)

Uhhh... No Dynapak dynos usually read higher, YMMV. Unless they have been calibrated to be more conservative which is supposed to be close to a DynoJet.

Mustang Dynos usually are the most conservative...

jermzz

iTrader: (18)

Agreed, how could you dyno less power when you take your tires and rims off just to get all hooked up to the dyno?

Studytime

iTrader: (15)

He posted this because he's looking for his lost power and for help. Doomsday, even if this was the STOCK cam power numbers should be better than that.

I'd say check the small stuff. Pull all your plugs and check for cracked plug or damaged wire. Something's wrong. Even on a mustang dyno you should have made more power than that.

Ben T.

adillhoff

Well... That is a smaller than LS6 cam. I am pretty sure the LS6 was a .550"/.550". I can't remember the duration. Just because it is ported doesn't mean big power gains with a small cam. It will help a lot more if more air is going through harder and faster.

I had the LS6 cam in my LS1 with 853 casting heads (the driver's side was cracked between the intake and exhaust valve on piston 7) and it dynoed 360/350 with LTs.

I think that sounds about right, maybe a tad bit low for the cam you chose. I would try for a second opinion.

broken98

Imo I think your numbers sound horrible i think your a/f could be leaned out alittle more and timming could be an issue. DOes the cam have any timing ground in? It also maybe your tunner

DaddySS

You should be pulling more, I would think 360 to 380 is reasonable.

You may want to start with a leak down and compression test to establish what you are working with.

BrandonDrecksage

iTrader: (1)

what is your timing..maybe it is really conservative. Also.... EVERY DYNO IS DIFFERENT...not to mention..the peopel can tweak them to read low or high. I'd run the car at the track to see what you get. also, one major thing...WHAT WERE YOUR NUMBER BEFORE THIS STUFF? and were they on the same dyno because dyno should be used for tuning and seeing how much you gain with a mod..... not figuring hwo much power your actually making. As far as you know..you had a crappy car to start with and were only making 280rwhp....jump up 50hp or so wouldn't be so bad.

Beasst8

iTrader: (1)

I did 340/356 with lid, LT's,ORY and through a FLOWMASTER. You should be making more than that. Either the tune is complete crap, or somethings wrong. Good luck and let us know what you find.

NVR KNO

on my 99 ss, i put 352/360 with just lt headers/lid. and this was with my cutouts closed, so i should be around 365-370 with them open. that does sound low.

JL ws-6

iTrader: (50)

Take the car to a track, and see what it runs... that will solve more of the mystery. If it traps at 108 mph, then you are obviously actually making what your dyno told you, if it runs 118 or so, then you knwo that its' making alot more then you think.

It doesn't make sense, with better heads and the cam I'd think you should be ebtter then you are. Is the car an auto or a stick? If it's an auto car tht was dyno'ed with the converter unlocked, then that might be the whole issue right there.. if it's a stick car, then there's a big question mark as to what is going on.

Get it to a track either way and make a full blast, even if the traction isn't good, you can tell by the mph and the car weight something.

HeapaShifter

iTrader: (2)

I'd guess you're only running on 7 cylinders.