Dynamometer Results & Comparisons - dyno results 405rwhp and 380tq

its a 01 trans am 6 spd. what i have done
eps 226 234 cam
tfs 215 heads
arh long tube headders 1/78
catted arh y pipe
have the 42lb injectors not on yet
ls2 t chain
hi vol oil pump
3 inch slp cat back
racetronix fuel pump and harness

im happy i at least made 405rwp. i was told that this cam would make in the
450rwhp range so i was expecting a little morelike 430 ish rwhp.
what do you guys think is there more in this car. or is it right on for the setup i have.

Thats very low for a 6speed and trickflows, it should be closer to the 450 you expected, i just did 404/385 with unported 5.3 truck heads through a 4.11 35spline 9" rear that robs about 15hp and 10 torque compared to a stock 10 bolt rear. Id check compression, your about 50hp low or thats a VERY stingy dyno. How do other heads/cam ls1's do there?

im using stock ls6 intake tb and maf with slp lid. rest of my car is stock. my trick flows are at 64cc. we had a problem with the clutch after 3 or 4 pull clutch pedal was comong up very slow. had to let it cool down to do last pass. do you guys think its the clutch holdingmy car back it has 77000 km on it and its stock. should this be the first thing i take care of. or do you guys think its not th issue. thanks for your guys help.

tunner saaid the tb is holding me back and clutch. what do you guys think.

Could be, if the clutch isnt fully engaged and its slipping it wont put the power down. Throttlebody wont hold you back THAT much, maybe 5-10hp tops. And then again with a FAST 92 or 102 setup should be more like 460-470 with all your other top notch stuff you got. Id try a new clutch and check compression and redyno it.

Another thing i dont like is your cam choice. Trickflows have EXCELLENT exhaust flow and like cams with a closer duration. Your 226/234 would be better being something like 232/234 with these heads.

That cam is better suited for a GM cast head where they have great intake cfm but dont flow well out of the exhaust side

I think it is time to save for the Fast intake with a matching throttle body. I think that stuff is killing you. I dynoed the same as you back in the day, except I had stock heads, and crappy MAC midlength headers. But I had the Fast 90/90 combo.

I agree a FAST would help but even with an ls6 intake a setup like this usually does way higher. Its dynoing like it has a 97-00 ls1 intake

Also you probably did this but did you get the 7.5" length pushrods and roller rockers that trickflow's require/recommend? If you have stock length 7.4" you wont be getting enough valve lift

Those numbers seem very low for your setup and you tb and intake isn't the main culprit imo, i'd find out whats wrong before i'd buy more go fast parts.

I have yells terra 1.7 roller rockers. The pushrods were. 7 something I will check it out and tell you guys. If I had low compression wouldent the runner know or wouldent the car make less power. If I did the fast 92 and 92 tb. A under drive crank pully. Would I be at 450rwhp.

Should I start off by doing the clutch what do you guys think.

Check compression first to check if any cylinders are low and then do a clutch, sounds like you need one reguardless, and if you had low compression in say 1 cylinder it wouldnt be that noticeable especially being your cammed the car lopes anyway and low on compression would probably put you where you are at if it wasnt that bad. Underdrive pulley is worth about 5-10hp and intake about 20hp MAX on a stock cube ls1. But you seem to have more going then that. Like the guy above said i wouldnt spend more money on go fast stuff until you get it "fixed" if you got low compression or something wrong in the valvetrain an intake isnt gonna help.

I agree a FAST would help but even with an ls6 intake a setup like this usually does way higher. Its dynoing like it has a 97-00 ls1 intake

I agree....

Most H/C cam LS1 cars have been making 430+ rwhp for damn near 10-12 years with a stock LS6 intake and stock TB...even with a stock balancer...And that was using archaic/tiny 224* single pattern cams..

I would expect a MINIMUM of 430 rwhp with any head/cam combo and an M6.
Id be looking for another dyno as well as doing a compression/leak down test.

that cam works great with TFS heads.get a better clutch ,and you need a fast intake.your exhaust with cats are holding you back also.if you find any low compression do a ls383 short block .

i will check for compression soon. i have tfs 21407500 pushrods says 6-7.50x 5/16 on the
package. when we were dynoing it it never stoped making power.

Bet its because you still are running stock injectors...

Running 42lb racetronics injectors.

obviously a low number.

I checked compression it's good 120 on all cyl. What should I check next pushrod length.
If pushrod length checks out I gess it's just clutch problem. Car drives good on street with no issues with clutch so far.

Hello..what kind of dyno? If Mustang, you're in the ballpark. If Dynojet, I'd say you have a slipping clutch..at least. Graph please...

It a dyno jet. I put graph up tonite.

I agree....

Most H/C cam LS1 cars have been making 430+ rwhp for damn near 10-12 years with a stock LS6 intake and stock TB...even with a stock balancer...And that was using archaic/tiny 224* single pattern cams..

I would expect a MINIMUM of 430 rwhp with any head/cam combo and an M6.
Id be looking for another dyno as well as doing a compression/leak down test.

I'm with Alan, my stock LS6 makes 385 RWHP.

My buddy had a 2002 SS six speed with a cam only make 400rwhp (as many do).

Then he put as cast TFS with a light hand cleanup and a FAST 92 on it and made 460rwhp.

Something is amiss.

got time to get dyno graph up hope this help with figuring out whats going on
with the car. what spark plugs should i be using on it i think i have ngk tr6 in it.
and what should it be gapped to? the other thing i was thinking of was do i need to mill my heads down the tfs 215 are at whaterer they come at. i think 64 or 68cc. could that be the issue? thanks for the help. i will definatly be putting a clutch in it this winter.

any ideas

Did you put the larger injectors in? This may be the reason. My car with stock 853 heads and a streetsweeper cam did 405 rwhp.

Stock clutch will have no hope of holding the power of a H/C car. Get a Monster or TDP stage 2 in that thing ASAP!

That's a low number on a dyno jet for sure, TFS 215 out of the box is 64cc you could've mill it down to 59cc gain compression and still be good with P to V.
I'm going to install tfs215 milled to 61cc with torq V2 soon I'll let you know how it goes, with prc 2.5 ls6 heads and fast 102/92 the car made 413 on mustang dyno

Is it just me or 120 on compression seem low?

I have 42lb injectors on the car already. Are they enough for my
My setup. What should my compression be on a head and cam car.
My plans for this winter is a stage 3+ clutch new slave and master.
A ported tb. Thanks for the help.

I'm Gona re do compression test too this winter.
I might do leak down test too just to make shure everything is okay.
The car drives good and has lots of power.

I'm Gona re do compression test too this winter.
I might do leak down test too just to make shure everything is okay.
The car drives good and has lots of power.

Did you keep wot and made sure the engine turned over 5 times when you were checking ?